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audacity/lib-src/libflac/src/libFLAC/stream_encoder.c
lllucius 8fb66c92a1 Update libflac to 1.3.0.
2013-10-24 16:08:56 +00:00

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/* libFLAC - Free Lossless Audio Codec library
* Copyright (C) 2000-2009 Josh Coalson
* Copyright (C) 2011-2013 Xiph.Org Foundation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of the Xiph.org Foundation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <limits.h>
#include <stdio.h>
#include <stdlib.h> /* for malloc() */
#include <string.h> /* for memcpy() */
#include <sys/types.h> /* for off_t */
#include "FLAC/assert.h"
#include "FLAC/stream_decoder.h"
#include "protected/stream_encoder.h"
#include "private/bitwriter.h"
#include "private/bitmath.h"
#include "private/crc.h"
#include "private/cpu.h"
#include "private/fixed.h"
#include "private/format.h"
#include "private/lpc.h"
#include "private/md5.h"
#include "private/memory.h"
#include "private/macros.h"
#if FLAC__HAS_OGG
#include "private/ogg_helper.h"
#include "private/ogg_mapping.h"
#endif
#include "private/stream_encoder_framing.h"
#include "private/window.h"
#include "share/alloc.h"
#include "share/compat.h"
#include "share/private.h"
/* Exact Rice codeword length calculation is off by default. The simple
* (and fast) estimation (of how many bits a residual value will be
* encoded with) in this encoder is very good, almost always yielding
* compression within 0.1% of exact calculation.
*/
#undef EXACT_RICE_BITS_CALCULATION
/* Rice parameter searching is off by default. The simple (and fast)
* parameter estimation in this encoder is very good, almost always
* yielding compression within 0.1% of the optimal parameters.
*/
#undef ENABLE_RICE_PARAMETER_SEARCH
typedef struct {
FLAC__int32 *data[FLAC__MAX_CHANNELS];
unsigned size; /* of each data[] in samples */
unsigned tail;
} verify_input_fifo;
typedef struct {
const FLAC__byte *data;
unsigned capacity;
unsigned bytes;
} verify_output;
typedef enum {
ENCODER_IN_MAGIC = 0,
ENCODER_IN_METADATA = 1,
ENCODER_IN_AUDIO = 2
} EncoderStateHint;
static struct CompressionLevels {
FLAC__bool do_mid_side_stereo;
FLAC__bool loose_mid_side_stereo;
unsigned max_lpc_order;
unsigned qlp_coeff_precision;
FLAC__bool do_qlp_coeff_prec_search;
FLAC__bool do_escape_coding;
FLAC__bool do_exhaustive_model_search;
unsigned min_residual_partition_order;
unsigned max_residual_partition_order;
unsigned rice_parameter_search_dist;
} compression_levels_[] = {
{ false, false, 0, 0, false, false, false, 0, 3, 0 },
{ true , true , 0, 0, false, false, false, 0, 3, 0 },
{ true , false, 0, 0, false, false, false, 0, 3, 0 },
{ false, false, 6, 0, false, false, false, 0, 4, 0 },
{ true , true , 8, 0, false, false, false, 0, 4, 0 },
{ true , false, 8, 0, false, false, false, 0, 5, 0 },
{ true , false, 8, 0, false, false, false, 0, 6, 0 },
{ true , false, 8, 0, false, false, true , 0, 6, 0 },
{ true , false, 12, 0, false, false, true , 0, 6, 0 }
};
/***********************************************************************
*
* Private class method prototypes
*
***********************************************************************/
static void set_defaults_(FLAC__StreamEncoder *encoder);
static void free_(FLAC__StreamEncoder *encoder);
static FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_blocksize);
static FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples, FLAC__bool is_last_block);
static FLAC__StreamEncoderWriteStatus write_frame_(FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, FLAC__bool is_last_block);
static void update_metadata_(const FLAC__StreamEncoder *encoder);
#if FLAC__HAS_OGG
static void update_ogg_metadata_(FLAC__StreamEncoder *encoder);
#endif
static FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block, FLAC__bool is_last_block);
static FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block);
static FLAC__bool process_subframe_(
FLAC__StreamEncoder *encoder,
unsigned min_partition_order,
unsigned max_partition_order,
const FLAC__FrameHeader *frame_header,
unsigned subframe_bps,
const FLAC__int32 integer_signal[],
FLAC__Subframe *subframe[2],
FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2],
FLAC__int32 *residual[2],
unsigned *best_subframe,
unsigned *best_bits
);
static FLAC__bool add_subframe_(
FLAC__StreamEncoder *encoder,
unsigned blocksize,
unsigned subframe_bps,
const FLAC__Subframe *subframe,
FLAC__BitWriter *frame
);
static unsigned evaluate_constant_subframe_(
FLAC__StreamEncoder *encoder,
const FLAC__int32 signal,
unsigned blocksize,
unsigned subframe_bps,
FLAC__Subframe *subframe
);
static unsigned evaluate_fixed_subframe_(
FLAC__StreamEncoder *encoder,
const FLAC__int32 signal[],
FLAC__int32 residual[],
FLAC__uint64 abs_residual_partition_sums[],
unsigned raw_bits_per_partition[],
unsigned blocksize,
unsigned subframe_bps,
unsigned order,
unsigned rice_parameter,
unsigned rice_parameter_limit,
unsigned min_partition_order,
unsigned max_partition_order,
FLAC__bool do_escape_coding,
unsigned rice_parameter_search_dist,
FLAC__Subframe *subframe,
FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
);
#ifndef FLAC__INTEGER_ONLY_LIBRARY
static unsigned evaluate_lpc_subframe_(
FLAC__StreamEncoder *encoder,
const FLAC__int32 signal[],
FLAC__int32 residual[],
FLAC__uint64 abs_residual_partition_sums[],
unsigned raw_bits_per_partition[],
const FLAC__real lp_coeff[],
unsigned blocksize,
unsigned subframe_bps,
unsigned order,
unsigned qlp_coeff_precision,
unsigned rice_parameter,
unsigned rice_parameter_limit,
unsigned min_partition_order,
unsigned max_partition_order,
FLAC__bool do_escape_coding,
unsigned rice_parameter_search_dist,
FLAC__Subframe *subframe,
FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
);
#endif
static unsigned evaluate_verbatim_subframe_(
FLAC__StreamEncoder *encoder,
const FLAC__int32 signal[],
unsigned blocksize,
unsigned subframe_bps,
FLAC__Subframe *subframe
);
static unsigned find_best_partition_order_(
struct FLAC__StreamEncoderPrivate *private_,
const FLAC__int32 residual[],
FLAC__uint64 abs_residual_partition_sums[],
unsigned raw_bits_per_partition[],
unsigned residual_samples,
unsigned predictor_order,
unsigned rice_parameter,
unsigned rice_parameter_limit,
unsigned min_partition_order,
unsigned max_partition_order,
unsigned bps,
FLAC__bool do_escape_coding,
unsigned rice_parameter_search_dist,
FLAC__EntropyCodingMethod *best_ecm
);
static void precompute_partition_info_sums_(
const FLAC__int32 residual[],
FLAC__uint64 abs_residual_partition_sums[],
unsigned residual_samples,
unsigned predictor_order,
unsigned min_partition_order,
unsigned max_partition_order,
unsigned bps
);
static void precompute_partition_info_escapes_(
const FLAC__int32 residual[],
unsigned raw_bits_per_partition[],
unsigned residual_samples,
unsigned predictor_order,
unsigned min_partition_order,
unsigned max_partition_order
);
static FLAC__bool set_partitioned_rice_(
#ifdef EXACT_RICE_BITS_CALCULATION
const FLAC__int32 residual[],
#endif
const FLAC__uint64 abs_residual_partition_sums[],
const unsigned raw_bits_per_partition[],
const unsigned residual_samples,
const unsigned predictor_order,
const unsigned suggested_rice_parameter,
const unsigned rice_parameter_limit,
const unsigned rice_parameter_search_dist,
const unsigned partition_order,
const FLAC__bool search_for_escapes,
FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
unsigned *bits
);
static unsigned get_wasted_bits_(FLAC__int32 signal[], unsigned samples);
/* verify-related routines: */
static void append_to_verify_fifo_(
verify_input_fifo *fifo,
const FLAC__int32 * const input[],
unsigned input_offset,
unsigned channels,
unsigned wide_samples
);
static void append_to_verify_fifo_interleaved_(
verify_input_fifo *fifo,
const FLAC__int32 input[],
unsigned input_offset,
unsigned channels,
unsigned wide_samples
);
static FLAC__StreamDecoderReadStatus verify_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
static FLAC__StreamDecoderWriteStatus verify_write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
static void verify_metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
static void verify_error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
static FLAC__StreamEncoderReadStatus file_read_callback_(const FLAC__StreamEncoder *encoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
static FLAC__StreamEncoderSeekStatus file_seek_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data);
static FLAC__StreamEncoderTellStatus file_tell_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
static FLAC__StreamEncoderWriteStatus file_write_callback_(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data);
static FILE *get_binary_stdout_(void);
/***********************************************************************
*
* Private class data
*
***********************************************************************/
typedef struct FLAC__StreamEncoderPrivate {
unsigned input_capacity; /* current size (in samples) of the signal and residual buffers */
FLAC__int32 *integer_signal[FLAC__MAX_CHANNELS]; /* the integer version of the input signal */
FLAC__int32 *integer_signal_mid_side[2]; /* the integer version of the mid-side input signal (stereo only) */
#ifndef FLAC__INTEGER_ONLY_LIBRARY
FLAC__real *real_signal[FLAC__MAX_CHANNELS]; /* (@@@ currently unused) the floating-point version of the input signal */
FLAC__real *real_signal_mid_side[2]; /* (@@@ currently unused) the floating-point version of the mid-side input signal (stereo only) */
FLAC__real *window[FLAC__MAX_APODIZATION_FUNCTIONS]; /* the pre-computed floating-point window for each apodization function */
FLAC__real *windowed_signal; /* the integer_signal[] * current window[] */
#endif
unsigned subframe_bps[FLAC__MAX_CHANNELS]; /* the effective bits per sample of the input signal (stream bps - wasted bits) */
unsigned subframe_bps_mid_side[2]; /* the effective bits per sample of the mid-side input signal (stream bps - wasted bits + 0/1) */
FLAC__int32 *residual_workspace[FLAC__MAX_CHANNELS][2]; /* each channel has a candidate and best workspace where the subframe residual signals will be stored */
FLAC__int32 *residual_workspace_mid_side[2][2];
FLAC__Subframe subframe_workspace[FLAC__MAX_CHANNELS][2];
FLAC__Subframe subframe_workspace_mid_side[2][2];
FLAC__Subframe *subframe_workspace_ptr[FLAC__MAX_CHANNELS][2];
FLAC__Subframe *subframe_workspace_ptr_mid_side[2][2];
FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace[FLAC__MAX_CHANNELS][2];
FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace_mid_side[FLAC__MAX_CHANNELS][2];
FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr[FLAC__MAX_CHANNELS][2];
FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr_mid_side[FLAC__MAX_CHANNELS][2];
unsigned best_subframe[FLAC__MAX_CHANNELS]; /* index (0 or 1) into 2nd dimension of the above workspaces */
unsigned best_subframe_mid_side[2];
unsigned best_subframe_bits[FLAC__MAX_CHANNELS]; /* size in bits of the best subframe for each channel */
unsigned best_subframe_bits_mid_side[2];
FLAC__uint64 *abs_residual_partition_sums; /* workspace where the sum of abs(candidate residual) for each partition is stored */
unsigned *raw_bits_per_partition; /* workspace where the sum of silog2(candidate residual) for each partition is stored */
FLAC__BitWriter *frame; /* the current frame being worked on */
unsigned loose_mid_side_stereo_frames; /* rounded number of frames the encoder will use before trying both independent and mid/side frames again */
unsigned loose_mid_side_stereo_frame_count; /* number of frames using the current channel assignment */
FLAC__ChannelAssignment last_channel_assignment;
FLAC__StreamMetadata streaminfo; /* scratchpad for STREAMINFO as it is built */
FLAC__StreamMetadata_SeekTable *seek_table; /* pointer into encoder->protected_->metadata_ where the seek table is */
unsigned current_sample_number;
unsigned current_frame_number;
FLAC__MD5Context md5context;
FLAC__CPUInfo cpuinfo;
#ifndef FLAC__INTEGER_ONLY_LIBRARY
unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]);
#else
unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__fixedpoint residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]);
#endif
#ifndef FLAC__INTEGER_ONLY_LIBRARY
void (*local_lpc_compute_autocorrelation)(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
void (*local_lpc_compute_residual_from_qlp_coefficients)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
void (*local_lpc_compute_residual_from_qlp_coefficients_64bit)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
void (*local_lpc_compute_residual_from_qlp_coefficients_16bit)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
#endif
FLAC__bool use_wide_by_block; /* use slow 64-bit versions of some functions because of the block size */
FLAC__bool use_wide_by_partition; /* use slow 64-bit versions of some functions because of the min partition order and blocksize */
FLAC__bool use_wide_by_order; /* use slow 64-bit versions of some functions because of the lpc order */
FLAC__bool disable_constant_subframes;
FLAC__bool disable_fixed_subframes;
FLAC__bool disable_verbatim_subframes;
#if FLAC__HAS_OGG
FLAC__bool is_ogg;
#endif
FLAC__StreamEncoderReadCallback read_callback; /* currently only needed for Ogg FLAC */
FLAC__StreamEncoderSeekCallback seek_callback;
FLAC__StreamEncoderTellCallback tell_callback;
FLAC__StreamEncoderWriteCallback write_callback;
FLAC__StreamEncoderMetadataCallback metadata_callback;
FLAC__StreamEncoderProgressCallback progress_callback;
void *client_data;
unsigned first_seekpoint_to_check;
FILE *file; /* only used when encoding to a file */
FLAC__uint64 bytes_written;
FLAC__uint64 samples_written;
unsigned frames_written;
unsigned total_frames_estimate;
/* unaligned (original) pointers to allocated data */
FLAC__int32 *integer_signal_unaligned[FLAC__MAX_CHANNELS];
FLAC__int32 *integer_signal_mid_side_unaligned[2];
#ifndef FLAC__INTEGER_ONLY_LIBRARY
FLAC__real *real_signal_unaligned[FLAC__MAX_CHANNELS]; /* (@@@ currently unused) */
FLAC__real *real_signal_mid_side_unaligned[2]; /* (@@@ currently unused) */
FLAC__real *window_unaligned[FLAC__MAX_APODIZATION_FUNCTIONS];
FLAC__real *windowed_signal_unaligned;
#endif
FLAC__int32 *residual_workspace_unaligned[FLAC__MAX_CHANNELS][2];
FLAC__int32 *residual_workspace_mid_side_unaligned[2][2];
FLAC__uint64 *abs_residual_partition_sums_unaligned;
unsigned *raw_bits_per_partition_unaligned;
/*
* These fields have been moved here from private function local
* declarations merely to save stack space during encoding.
*/
#ifndef FLAC__INTEGER_ONLY_LIBRARY
FLAC__real lp_coeff[FLAC__MAX_LPC_ORDER][FLAC__MAX_LPC_ORDER]; /* from process_subframe_() */
#endif
FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_extra[2]; /* from find_best_partition_order_() */
/*
* The data for the verify section
*/
struct {
FLAC__StreamDecoder *decoder;
EncoderStateHint state_hint;
FLAC__bool needs_magic_hack;
verify_input_fifo input_fifo;
verify_output output;
struct {
FLAC__uint64 absolute_sample;
unsigned frame_number;
unsigned channel;
unsigned sample;
FLAC__int32 expected;
FLAC__int32 got;
} error_stats;
} verify;
FLAC__bool is_being_deleted; /* if true, call to ..._finish() from ..._delete() will not call the callbacks */
} FLAC__StreamEncoderPrivate;
/***********************************************************************
*
* Public static class data
*
***********************************************************************/
FLAC_API const char * const FLAC__StreamEncoderStateString[] = {
"FLAC__STREAM_ENCODER_OK",
"FLAC__STREAM_ENCODER_UNINITIALIZED",
"FLAC__STREAM_ENCODER_OGG_ERROR",
"FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR",
"FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA",
"FLAC__STREAM_ENCODER_CLIENT_ERROR",
"FLAC__STREAM_ENCODER_IO_ERROR",
"FLAC__STREAM_ENCODER_FRAMING_ERROR",
"FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR"
};
FLAC_API const char * const FLAC__StreamEncoderInitStatusString[] = {
"FLAC__STREAM_ENCODER_INIT_STATUS_OK",
"FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR",
"FLAC__STREAM_ENCODER_INIT_STATUS_UNSUPPORTED_CONTAINER",
"FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_CALLBACKS",
"FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_NUMBER_OF_CHANNELS",
"FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BITS_PER_SAMPLE",
"FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_SAMPLE_RATE",
"FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BLOCK_SIZE",
"FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_MAX_LPC_ORDER",
"FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_QLP_COEFF_PRECISION",
"FLAC__STREAM_ENCODER_INIT_STATUS_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER",
"FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE",
"FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA",
"FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED"
};
FLAC_API const char * const FLAC__StreamEncoderReadStatusString[] = {
"FLAC__STREAM_ENCODER_READ_STATUS_CONTINUE",
"FLAC__STREAM_ENCODER_READ_STATUS_END_OF_STREAM",
"FLAC__STREAM_ENCODER_READ_STATUS_ABORT",
"FLAC__STREAM_ENCODER_READ_STATUS_UNSUPPORTED"
};
FLAC_API const char * const FLAC__StreamEncoderWriteStatusString[] = {
"FLAC__STREAM_ENCODER_WRITE_STATUS_OK",
"FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR"
};
FLAC_API const char * const FLAC__StreamEncoderSeekStatusString[] = {
"FLAC__STREAM_ENCODER_SEEK_STATUS_OK",
"FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR",
"FLAC__STREAM_ENCODER_SEEK_STATUS_UNSUPPORTED"
};
FLAC_API const char * const FLAC__StreamEncoderTellStatusString[] = {
"FLAC__STREAM_ENCODER_TELL_STATUS_OK",
"FLAC__STREAM_ENCODER_TELL_STATUS_ERROR",
"FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED"
};
/* Number of samples that will be overread to watch for end of stream. By
* 'overread', we mean that the FLAC__stream_encoder_process*() calls will
* always try to read blocksize+1 samples before encoding a block, so that
* even if the stream has a total sample count that is an integral multiple
* of the blocksize, we will still notice when we are encoding the last
* block. This is needed, for example, to correctly set the end-of-stream
* marker in Ogg FLAC.
*
* WATCHOUT: some parts of the code assert that OVERREAD_ == 1 and there's
* not really any reason to change it.
*/
static const unsigned OVERREAD_ = 1;
/***********************************************************************
*
* Class constructor/destructor
*
*/
FLAC_API FLAC__StreamEncoder *FLAC__stream_encoder_new(void)
{
FLAC__StreamEncoder *encoder;
unsigned i;
FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
encoder = calloc(1, sizeof(FLAC__StreamEncoder));
if(encoder == 0) {
return 0;
}
encoder->protected_ = calloc(1, sizeof(FLAC__StreamEncoderProtected));
if(encoder->protected_ == 0) {
free(encoder);
return 0;
}
encoder->private_ = calloc(1, sizeof(FLAC__StreamEncoderPrivate));
if(encoder->private_ == 0) {
free(encoder->protected_);
free(encoder);
return 0;
}
encoder->private_->frame = FLAC__bitwriter_new();
if(encoder->private_->frame == 0) {
free(encoder->private_);
free(encoder->protected_);
free(encoder);
return 0;
}
encoder->private_->file = 0;
set_defaults_(encoder);
encoder->private_->is_being_deleted = false;
for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
encoder->private_->subframe_workspace_ptr[i][0] = &encoder->private_->subframe_workspace[i][0];
encoder->private_->subframe_workspace_ptr[i][1] = &encoder->private_->subframe_workspace[i][1];
}
for(i = 0; i < 2; i++) {
encoder->private_->subframe_workspace_ptr_mid_side[i][0] = &encoder->private_->subframe_workspace_mid_side[i][0];
encoder->private_->subframe_workspace_ptr_mid_side[i][1] = &encoder->private_->subframe_workspace_mid_side[i][1];
}
for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
encoder->private_->partitioned_rice_contents_workspace_ptr[i][0] = &encoder->private_->partitioned_rice_contents_workspace[i][0];
encoder->private_->partitioned_rice_contents_workspace_ptr[i][1] = &encoder->private_->partitioned_rice_contents_workspace[i][1];
}
for(i = 0; i < 2; i++) {
encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][0] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0];
encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][1] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1];
}
for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][0]);
FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][1]);
}
for(i = 0; i < 2; i++) {
FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]);
FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]);
}
for(i = 0; i < 2; i++)
FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_extra[i]);
encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
return encoder;
}
FLAC_API void FLAC__stream_encoder_delete(FLAC__StreamEncoder *encoder)
{
unsigned i;
if (encoder == NULL)
return ;
FLAC__ASSERT(0 != encoder->protected_);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->private_->frame);
encoder->private_->is_being_deleted = true;
(void)FLAC__stream_encoder_finish(encoder);
if(0 != encoder->private_->verify.decoder)
FLAC__stream_decoder_delete(encoder->private_->verify.decoder);
for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][0]);
FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][1]);
}
for(i = 0; i < 2; i++) {
FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]);
FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]);
}
for(i = 0; i < 2; i++)
FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_extra[i]);
FLAC__bitwriter_delete(encoder->private_->frame);
free(encoder->private_);
free(encoder->protected_);
free(encoder);
}
/***********************************************************************
*
* Public class methods
*
***********************************************************************/
static FLAC__StreamEncoderInitStatus init_stream_internal_(
FLAC__StreamEncoder *encoder,
FLAC__StreamEncoderReadCallback read_callback,
FLAC__StreamEncoderWriteCallback write_callback,
FLAC__StreamEncoderSeekCallback seek_callback,
FLAC__StreamEncoderTellCallback tell_callback,
FLAC__StreamEncoderMetadataCallback metadata_callback,
void *client_data,
FLAC__bool is_ogg
)
{
unsigned i;
FLAC__bool metadata_has_seektable, metadata_has_vorbis_comment, metadata_picture_has_type1, metadata_picture_has_type2;
FLAC__ASSERT(0 != encoder);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED;
#if !FLAC__HAS_OGG
if(is_ogg)
return FLAC__STREAM_ENCODER_INIT_STATUS_UNSUPPORTED_CONTAINER;
#endif
if(0 == write_callback || (seek_callback && 0 == tell_callback))
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_CALLBACKS;
if(encoder->protected_->channels == 0 || encoder->protected_->channels > FLAC__MAX_CHANNELS)
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_NUMBER_OF_CHANNELS;
if(encoder->protected_->channels != 2) {
encoder->protected_->do_mid_side_stereo = false;
encoder->protected_->loose_mid_side_stereo = false;
}
else if(!encoder->protected_->do_mid_side_stereo)
encoder->protected_->loose_mid_side_stereo = false;
if(encoder->protected_->bits_per_sample >= 32)
encoder->protected_->do_mid_side_stereo = false; /* since we currenty do 32-bit math, the side channel would have 33 bps and overflow */
if(encoder->protected_->bits_per_sample < FLAC__MIN_BITS_PER_SAMPLE || encoder->protected_->bits_per_sample > FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE)
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BITS_PER_SAMPLE;
if(!FLAC__format_sample_rate_is_valid(encoder->protected_->sample_rate))
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_SAMPLE_RATE;
if(encoder->protected_->blocksize == 0) {
if(encoder->protected_->max_lpc_order == 0)
encoder->protected_->blocksize = 1152;
else
encoder->protected_->blocksize = 4096;
}
if(encoder->protected_->blocksize < FLAC__MIN_BLOCK_SIZE || encoder->protected_->blocksize > FLAC__MAX_BLOCK_SIZE)
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BLOCK_SIZE;
if(encoder->protected_->max_lpc_order > FLAC__MAX_LPC_ORDER)
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_MAX_LPC_ORDER;
if(encoder->protected_->blocksize < encoder->protected_->max_lpc_order)
return FLAC__STREAM_ENCODER_INIT_STATUS_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER;
if(encoder->protected_->qlp_coeff_precision == 0) {
if(encoder->protected_->bits_per_sample < 16) {
/* @@@ need some data about how to set this here w.r.t. blocksize and sample rate */
/* @@@ until then we'll make a guess */
encoder->protected_->qlp_coeff_precision = flac_max(FLAC__MIN_QLP_COEFF_PRECISION, 2 + encoder->protected_->bits_per_sample / 2);
}
else if(encoder->protected_->bits_per_sample == 16) {
if(encoder->protected_->blocksize <= 192)
encoder->protected_->qlp_coeff_precision = 7;
else if(encoder->protected_->blocksize <= 384)
encoder->protected_->qlp_coeff_precision = 8;
else if(encoder->protected_->blocksize <= 576)
encoder->protected_->qlp_coeff_precision = 9;
else if(encoder->protected_->blocksize <= 1152)
encoder->protected_->qlp_coeff_precision = 10;
else if(encoder->protected_->blocksize <= 2304)
encoder->protected_->qlp_coeff_precision = 11;
else if(encoder->protected_->blocksize <= 4608)
encoder->protected_->qlp_coeff_precision = 12;
else
encoder->protected_->qlp_coeff_precision = 13;
}
else {
if(encoder->protected_->blocksize <= 384)
encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-2;
else if(encoder->protected_->blocksize <= 1152)
encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-1;
else
encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION;
}
FLAC__ASSERT(encoder->protected_->qlp_coeff_precision <= FLAC__MAX_QLP_COEFF_PRECISION);
}
else if(encoder->protected_->qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION || encoder->protected_->qlp_coeff_precision > FLAC__MAX_QLP_COEFF_PRECISION)
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_QLP_COEFF_PRECISION;
if(encoder->protected_->streamable_subset) {
if(!FLAC__format_blocksize_is_subset(encoder->protected_->blocksize, encoder->protected_->sample_rate))
return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
if(!FLAC__format_sample_rate_is_subset(encoder->protected_->sample_rate))
return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
if(
encoder->protected_->bits_per_sample != 8 &&
encoder->protected_->bits_per_sample != 12 &&
encoder->protected_->bits_per_sample != 16 &&
encoder->protected_->bits_per_sample != 20 &&
encoder->protected_->bits_per_sample != 24
)
return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
if(encoder->protected_->max_residual_partition_order > FLAC__SUBSET_MAX_RICE_PARTITION_ORDER)
return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
if(
encoder->protected_->sample_rate <= 48000 &&
(
encoder->protected_->blocksize > FLAC__SUBSET_MAX_BLOCK_SIZE_48000HZ ||
encoder->protected_->max_lpc_order > FLAC__SUBSET_MAX_LPC_ORDER_48000HZ
)
) {
return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
}
}
if(encoder->protected_->max_residual_partition_order >= (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
encoder->protected_->max_residual_partition_order = (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN) - 1;
if(encoder->protected_->min_residual_partition_order >= encoder->protected_->max_residual_partition_order)
encoder->protected_->min_residual_partition_order = encoder->protected_->max_residual_partition_order;
#if FLAC__HAS_OGG
/* reorder metadata if necessary to ensure that any VORBIS_COMMENT is the first, according to the mapping spec */
if(is_ogg && 0 != encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 1) {
unsigned i1;
for(i1 = 1; i1 < encoder->protected_->num_metadata_blocks; i1++) {
if(0 != encoder->protected_->metadata[i1] && encoder->protected_->metadata[i1]->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
FLAC__StreamMetadata *vc = encoder->protected_->metadata[i1];
for( ; i1 > 0; i1--)
encoder->protected_->metadata[i1] = encoder->protected_->metadata[i1-1];
encoder->protected_->metadata[0] = vc;
break;
}
}
}
#endif
/* keep track of any SEEKTABLE block */
if(0 != encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 0) {
unsigned i2;
for(i2 = 0; i2 < encoder->protected_->num_metadata_blocks; i2++) {
if(0 != encoder->protected_->metadata[i2] && encoder->protected_->metadata[i2]->type == FLAC__METADATA_TYPE_SEEKTABLE) {
encoder->private_->seek_table = &encoder->protected_->metadata[i2]->data.seek_table;
break; /* take only the first one */
}
}
}
/* validate metadata */
if(0 == encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 0)
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
metadata_has_seektable = false;
metadata_has_vorbis_comment = false;
metadata_picture_has_type1 = false;
metadata_picture_has_type2 = false;
for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
const FLAC__StreamMetadata *m = encoder->protected_->metadata[i];
if(m->type == FLAC__METADATA_TYPE_STREAMINFO)
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
else if(m->type == FLAC__METADATA_TYPE_SEEKTABLE) {
if(metadata_has_seektable) /* only one is allowed */
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
metadata_has_seektable = true;
if(!FLAC__format_seektable_is_legal(&m->data.seek_table))
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
}
else if(m->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
if(metadata_has_vorbis_comment) /* only one is allowed */
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
metadata_has_vorbis_comment = true;
}
else if(m->type == FLAC__METADATA_TYPE_CUESHEET) {
if(!FLAC__format_cuesheet_is_legal(&m->data.cue_sheet, m->data.cue_sheet.is_cd, /*violation=*/0))
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
}
else if(m->type == FLAC__METADATA_TYPE_PICTURE) {
if(!FLAC__format_picture_is_legal(&m->data.picture, /*violation=*/0))
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD) {
if(metadata_picture_has_type1) /* there should only be 1 per stream */
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
metadata_picture_has_type1 = true;
/* standard icon must be 32x32 pixel PNG */
if(
m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD &&
(
(strcmp(m->data.picture.mime_type, "image/png") && strcmp(m->data.picture.mime_type, "-->")) ||
m->data.picture.width != 32 ||
m->data.picture.height != 32
)
)
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
}
else if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON) {
if(metadata_picture_has_type2) /* there should only be 1 per stream */
return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
metadata_picture_has_type2 = true;
}
}
}
encoder->private_->input_capacity = 0;
for(i = 0; i < encoder->protected_->channels; i++) {
encoder->private_->integer_signal_unaligned[i] = encoder->private_->integer_signal[i] = 0;
#ifndef FLAC__INTEGER_ONLY_LIBRARY
encoder->private_->real_signal_unaligned[i] = encoder->private_->real_signal[i] = 0;
#endif
}
for(i = 0; i < 2; i++) {
encoder->private_->integer_signal_mid_side_unaligned[i] = encoder->private_->integer_signal_mid_side[i] = 0;
#ifndef FLAC__INTEGER_ONLY_LIBRARY
encoder->private_->real_signal_mid_side_unaligned[i] = encoder->private_->real_signal_mid_side[i] = 0;
#endif
}
#ifndef FLAC__INTEGER_ONLY_LIBRARY
for(i = 0; i < encoder->protected_->num_apodizations; i++)
encoder->private_->window_unaligned[i] = encoder->private_->window[i] = 0;
encoder->private_->windowed_signal_unaligned = encoder->private_->windowed_signal = 0;
#endif
for(i = 0; i < encoder->protected_->channels; i++) {
encoder->private_->residual_workspace_unaligned[i][0] = encoder->private_->residual_workspace[i][0] = 0;
encoder->private_->residual_workspace_unaligned[i][1] = encoder->private_->residual_workspace[i][1] = 0;
encoder->private_->best_subframe[i] = 0;
}
for(i = 0; i < 2; i++) {
encoder->private_->residual_workspace_mid_side_unaligned[i][0] = encoder->private_->residual_workspace_mid_side[i][0] = 0;
encoder->private_->residual_workspace_mid_side_unaligned[i][1] = encoder->private_->residual_workspace_mid_side[i][1] = 0;
encoder->private_->best_subframe_mid_side[i] = 0;
}
encoder->private_->abs_residual_partition_sums_unaligned = encoder->private_->abs_residual_partition_sums = 0;
encoder->private_->raw_bits_per_partition_unaligned = encoder->private_->raw_bits_per_partition = 0;
#ifndef FLAC__INTEGER_ONLY_LIBRARY
encoder->private_->loose_mid_side_stereo_frames = (unsigned)((FLAC__double)encoder->protected_->sample_rate * 0.4 / (FLAC__double)encoder->protected_->blocksize + 0.5);
#else
/* 26214 is the approximate fixed-point equivalent to 0.4 (0.4 * 2^16) */
/* sample rate can be up to 655350 Hz, and thus use 20 bits, so we do the multiply&divide by hand */
FLAC__ASSERT(FLAC__MAX_SAMPLE_RATE <= 655350);
FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535);
FLAC__ASSERT(encoder->protected_->sample_rate <= 655350);
FLAC__ASSERT(encoder->protected_->blocksize <= 65535);
encoder->private_->loose_mid_side_stereo_frames = (unsigned)FLAC__fixedpoint_trunc((((FLAC__uint64)(encoder->protected_->sample_rate) * (FLAC__uint64)(26214)) << 16) / (encoder->protected_->blocksize<<16) + FLAC__FP_ONE_HALF);
#endif
if(encoder->private_->loose_mid_side_stereo_frames == 0)
encoder->private_->loose_mid_side_stereo_frames = 1;
encoder->private_->loose_mid_side_stereo_frame_count = 0;
encoder->private_->current_sample_number = 0;
encoder->private_->current_frame_number = 0;
encoder->private_->use_wide_by_block = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(encoder->protected_->blocksize)+1 > 30);
encoder->private_->use_wide_by_order = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(flac_max(encoder->protected_->max_lpc_order, FLAC__MAX_FIXED_ORDER))+1 > 30); /*@@@ need to use this? */
encoder->private_->use_wide_by_partition = (false); /*@@@ need to set this */
/*
* get the CPU info and set the function pointers
*/
FLAC__cpu_info(&encoder->private_->cpuinfo);
/* first default to the non-asm routines */
#ifndef FLAC__INTEGER_ONLY_LIBRARY
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation;
#endif
encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor;
#ifndef FLAC__INTEGER_ONLY_LIBRARY
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients;
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit = FLAC__lpc_compute_residual_from_qlp_coefficients_wide;
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients;
#endif
/* now override with asm where appropriate */
#ifndef FLAC__INTEGER_ONLY_LIBRARY
# ifndef FLAC__NO_ASM
if(encoder->private_->cpuinfo.use_asm) {
# ifdef FLAC__CPU_IA32
FLAC__ASSERT(encoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
# ifdef FLAC__HAS_NASM
if(encoder->private_->cpuinfo.data.ia32.sse) {
if(encoder->protected_->max_lpc_order < 4)
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_4;
else if(encoder->protected_->max_lpc_order < 8)
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_8;
else if(encoder->protected_->max_lpc_order < 12)
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_12;
else
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
}
else if(encoder->private_->cpuinfo.data.ia32._3dnow)
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_3dnow;
else
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
if(encoder->private_->cpuinfo.data.ia32.mmx) {
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx;
}
else {
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
}
if(encoder->private_->cpuinfo.data.ia32.mmx && encoder->private_->cpuinfo.data.ia32.cmov)
encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov;
# endif /* FLAC__HAS_NASM */
# endif /* FLAC__CPU_IA32 */
}
# endif /* !FLAC__NO_ASM */
#endif /* !FLAC__INTEGER_ONLY_LIBRARY */
/* finally override based on wide-ness if necessary */
if(encoder->private_->use_wide_by_block) {
encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_wide;
}
/* set state to OK; from here on, errors are fatal and we'll override the state then */
encoder->protected_->state = FLAC__STREAM_ENCODER_OK;
#if FLAC__HAS_OGG
encoder->private_->is_ogg = is_ogg;
if(is_ogg && !FLAC__ogg_encoder_aspect_init(&encoder->protected_->ogg_encoder_aspect)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
#endif
encoder->private_->read_callback = read_callback;
encoder->private_->write_callback = write_callback;
encoder->private_->seek_callback = seek_callback;
encoder->private_->tell_callback = tell_callback;
encoder->private_->metadata_callback = metadata_callback;
encoder->private_->client_data = client_data;
if(!resize_buffers_(encoder, encoder->protected_->blocksize)) {
/* the above function sets the state for us in case of an error */
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
if(!FLAC__bitwriter_init(encoder->private_->frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
/*
* Set up the verify stuff if necessary
*/
if(encoder->protected_->verify) {
/*
* First, set up the fifo which will hold the
* original signal to compare against
*/
encoder->private_->verify.input_fifo.size = encoder->protected_->blocksize+OVERREAD_;
for(i = 0; i < encoder->protected_->channels; i++) {
if(0 == (encoder->private_->verify.input_fifo.data[i] = safe_malloc_mul_2op_p(sizeof(FLAC__int32), /*times*/encoder->private_->verify.input_fifo.size))) {
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
}
encoder->private_->verify.input_fifo.tail = 0;
/*
* Now set up a stream decoder for verification
*/
if(0 == encoder->private_->verify.decoder) {
encoder->private_->verify.decoder = FLAC__stream_decoder_new();
if(0 == encoder->private_->verify.decoder) {
encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
}
if(FLAC__stream_decoder_init_stream(encoder->private_->verify.decoder, verify_read_callback_, /*seek_callback=*/0, /*tell_callback=*/0, /*length_callback=*/0, /*eof_callback=*/0, verify_write_callback_, verify_metadata_callback_, verify_error_callback_, /*client_data=*/encoder) != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
}
encoder->private_->verify.error_stats.absolute_sample = 0;
encoder->private_->verify.error_stats.frame_number = 0;
encoder->private_->verify.error_stats.channel = 0;
encoder->private_->verify.error_stats.sample = 0;
encoder->private_->verify.error_stats.expected = 0;
encoder->private_->verify.error_stats.got = 0;
/*
* These must be done before we write any metadata, because that
* calls the write_callback, which uses these values.
*/
encoder->private_->first_seekpoint_to_check = 0;
encoder->private_->samples_written = 0;
encoder->protected_->streaminfo_offset = 0;
encoder->protected_->seektable_offset = 0;
encoder->protected_->audio_offset = 0;
/*
* write the stream header
*/
if(encoder->protected_->verify)
encoder->private_->verify.state_hint = ENCODER_IN_MAGIC;
if(!FLAC__bitwriter_write_raw_uint32(encoder->private_->frame, FLAC__STREAM_SYNC, FLAC__STREAM_SYNC_LEN)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
if(!write_bitbuffer_(encoder, 0, /*is_last_block=*/false)) {
/* the above function sets the state for us in case of an error */
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
/*
* write the STREAMINFO metadata block
*/
if(encoder->protected_->verify)
encoder->private_->verify.state_hint = ENCODER_IN_METADATA;
encoder->private_->streaminfo.type = FLAC__METADATA_TYPE_STREAMINFO;
encoder->private_->streaminfo.is_last = false; /* we will have at a minimum a VORBIS_COMMENT afterwards */
encoder->private_->streaminfo.length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH;
encoder->private_->streaminfo.data.stream_info.min_blocksize = encoder->protected_->blocksize; /* this encoder uses the same blocksize for the whole stream */
encoder->private_->streaminfo.data.stream_info.max_blocksize = encoder->protected_->blocksize;
encoder->private_->streaminfo.data.stream_info.min_framesize = 0; /* we don't know this yet; have to fill it in later */
encoder->private_->streaminfo.data.stream_info.max_framesize = 0; /* we don't know this yet; have to fill it in later */
encoder->private_->streaminfo.data.stream_info.sample_rate = encoder->protected_->sample_rate;
encoder->private_->streaminfo.data.stream_info.channels = encoder->protected_->channels;
encoder->private_->streaminfo.data.stream_info.bits_per_sample = encoder->protected_->bits_per_sample;
encoder->private_->streaminfo.data.stream_info.total_samples = encoder->protected_->total_samples_estimate; /* we will replace this later with the real total */
memset(encoder->private_->streaminfo.data.stream_info.md5sum, 0, 16); /* we don't know this yet; have to fill it in later */
if(encoder->protected_->do_md5)
FLAC__MD5Init(&encoder->private_->md5context);
if(!FLAC__add_metadata_block(&encoder->private_->streaminfo, encoder->private_->frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
if(!write_bitbuffer_(encoder, 0, /*is_last_block=*/false)) {
/* the above function sets the state for us in case of an error */
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
/*
* Now that the STREAMINFO block is written, we can init this to an
* absurdly-high value...
*/
encoder->private_->streaminfo.data.stream_info.min_framesize = (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN) - 1;
/* ... and clear this to 0 */
encoder->private_->streaminfo.data.stream_info.total_samples = 0;
/*
* Check to see if the supplied metadata contains a VORBIS_COMMENT;
* if not, we will write an empty one (FLAC__add_metadata_block()
* automatically supplies the vendor string).
*
* WATCHOUT: the Ogg FLAC mapping requires us to write this block after
* the STREAMINFO. (In the case that metadata_has_vorbis_comment is
* true it will have already insured that the metadata list is properly
* ordered.)
*/
if(!metadata_has_vorbis_comment) {
FLAC__StreamMetadata vorbis_comment;
vorbis_comment.type = FLAC__METADATA_TYPE_VORBIS_COMMENT;
vorbis_comment.is_last = (encoder->protected_->num_metadata_blocks == 0);
vorbis_comment.length = 4 + 4; /* MAGIC NUMBER */
vorbis_comment.data.vorbis_comment.vendor_string.length = 0;
vorbis_comment.data.vorbis_comment.vendor_string.entry = 0;
vorbis_comment.data.vorbis_comment.num_comments = 0;
vorbis_comment.data.vorbis_comment.comments = 0;
if(!FLAC__add_metadata_block(&vorbis_comment, encoder->private_->frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
if(!write_bitbuffer_(encoder, 0, /*is_last_block=*/false)) {
/* the above function sets the state for us in case of an error */
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
}
/*
* write the user's metadata blocks
*/
for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
encoder->protected_->metadata[i]->is_last = (i == encoder->protected_->num_metadata_blocks - 1);
if(!FLAC__add_metadata_block(encoder->protected_->metadata[i], encoder->private_->frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
if(!write_bitbuffer_(encoder, 0, /*is_last_block=*/false)) {
/* the above function sets the state for us in case of an error */
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
}
/* now that all the metadata is written, we save the stream offset */
if(encoder->private_->tell_callback && encoder->private_->tell_callback(encoder, &encoder->protected_->audio_offset, encoder->private_->client_data) == FLAC__STREAM_ENCODER_TELL_STATUS_ERROR) { /* FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED just means we didn't get the offset; no error */
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
if(encoder->protected_->verify)
encoder->private_->verify.state_hint = ENCODER_IN_AUDIO;
return FLAC__STREAM_ENCODER_INIT_STATUS_OK;
}
FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_stream(
FLAC__StreamEncoder *encoder,
FLAC__StreamEncoderWriteCallback write_callback,
FLAC__StreamEncoderSeekCallback seek_callback,
FLAC__StreamEncoderTellCallback tell_callback,
FLAC__StreamEncoderMetadataCallback metadata_callback,
void *client_data
)
{
return init_stream_internal_(
encoder,
/*read_callback=*/0,
write_callback,
seek_callback,
tell_callback,
metadata_callback,
client_data,
/*is_ogg=*/false
);
}
FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_stream(
FLAC__StreamEncoder *encoder,
FLAC__StreamEncoderReadCallback read_callback,
FLAC__StreamEncoderWriteCallback write_callback,
FLAC__StreamEncoderSeekCallback seek_callback,
FLAC__StreamEncoderTellCallback tell_callback,
FLAC__StreamEncoderMetadataCallback metadata_callback,
void *client_data
)
{
return init_stream_internal_(
encoder,
read_callback,
write_callback,
seek_callback,
tell_callback,
metadata_callback,
client_data,
/*is_ogg=*/true
);
}
static FLAC__StreamEncoderInitStatus init_FILE_internal_(
FLAC__StreamEncoder *encoder,
FILE *file,
FLAC__StreamEncoderProgressCallback progress_callback,
void *client_data,
FLAC__bool is_ogg
)
{
FLAC__StreamEncoderInitStatus init_status;
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != file);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED;
/* double protection */
if(file == 0) {
encoder->protected_->state = FLAC__STREAM_ENCODER_IO_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
/*
* To make sure that our file does not go unclosed after an error, we
* must assign the FILE pointer before any further error can occur in
* this routine.
*/
if(file == stdout)
file = get_binary_stdout_(); /* just to be safe */
encoder->private_->file = file;
encoder->private_->progress_callback = progress_callback;
encoder->private_->bytes_written = 0;
encoder->private_->samples_written = 0;
encoder->private_->frames_written = 0;
init_status = init_stream_internal_(
encoder,
encoder->private_->file == stdout? 0 : is_ogg? file_read_callback_ : 0,
file_write_callback_,
encoder->private_->file == stdout? 0 : file_seek_callback_,
encoder->private_->file == stdout? 0 : file_tell_callback_,
/*metadata_callback=*/0,
client_data,
is_ogg
);
if(init_status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) {
/* the above function sets the state for us in case of an error */
return init_status;
}
{
unsigned blocksize = FLAC__stream_encoder_get_blocksize(encoder);
FLAC__ASSERT(blocksize != 0);
encoder->private_->total_frames_estimate = (unsigned)((FLAC__stream_encoder_get_total_samples_estimate(encoder) + blocksize - 1) / blocksize);
}
return init_status;
}
FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_FILE(
FLAC__StreamEncoder *encoder,
FILE *file,
FLAC__StreamEncoderProgressCallback progress_callback,
void *client_data
)
{
return init_FILE_internal_(encoder, file, progress_callback, client_data, /*is_ogg=*/false);
}
FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_FILE(
FLAC__StreamEncoder *encoder,
FILE *file,
FLAC__StreamEncoderProgressCallback progress_callback,
void *client_data
)
{
return init_FILE_internal_(encoder, file, progress_callback, client_data, /*is_ogg=*/true);
}
static FLAC__StreamEncoderInitStatus init_file_internal_(
FLAC__StreamEncoder *encoder,
const char *filename,
FLAC__StreamEncoderProgressCallback progress_callback,
void *client_data,
FLAC__bool is_ogg
)
{
FILE *file;
FLAC__ASSERT(0 != encoder);
/*
* To make sure that our file does not go unclosed after an error, we
* have to do the same entrance checks here that are later performed
* in FLAC__stream_encoder_init_FILE() before the FILE* is assigned.
*/
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED;
file = filename? flac_fopen(filename, "w+b") : stdout;
if(file == 0) {
encoder->protected_->state = FLAC__STREAM_ENCODER_IO_ERROR;
return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
}
return init_FILE_internal_(encoder, file, progress_callback, client_data, is_ogg);
}
FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_file(
FLAC__StreamEncoder *encoder,
const char *filename,
FLAC__StreamEncoderProgressCallback progress_callback,
void *client_data
)
{
return init_file_internal_(encoder, filename, progress_callback, client_data, /*is_ogg=*/false);
}
FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_file(
FLAC__StreamEncoder *encoder,
const char *filename,
FLAC__StreamEncoderProgressCallback progress_callback,
void *client_data
)
{
return init_file_internal_(encoder, filename, progress_callback, client_data, /*is_ogg=*/true);
}
FLAC_API FLAC__bool FLAC__stream_encoder_finish(FLAC__StreamEncoder *encoder)
{
FLAC__bool error = false;
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state == FLAC__STREAM_ENCODER_UNINITIALIZED)
return true;
if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) {
if(encoder->private_->current_sample_number != 0) {
const FLAC__bool is_fractional_block = encoder->protected_->blocksize != encoder->private_->current_sample_number;
encoder->protected_->blocksize = encoder->private_->current_sample_number;
if(!process_frame_(encoder, is_fractional_block, /*is_last_block=*/true))
error = true;
}
}
if(encoder->protected_->do_md5)
FLAC__MD5Final(encoder->private_->streaminfo.data.stream_info.md5sum, &encoder->private_->md5context);
if(!encoder->private_->is_being_deleted) {
if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK) {
if(encoder->private_->seek_callback) {
#if FLAC__HAS_OGG
if(encoder->private_->is_ogg)
update_ogg_metadata_(encoder);
else
#endif
update_metadata_(encoder);
/* check if an error occurred while updating metadata */
if(encoder->protected_->state != FLAC__STREAM_ENCODER_OK)
error = true;
}
if(encoder->private_->metadata_callback)
encoder->private_->metadata_callback(encoder, &encoder->private_->streaminfo, encoder->private_->client_data);
}
if(encoder->protected_->verify && 0 != encoder->private_->verify.decoder && !FLAC__stream_decoder_finish(encoder->private_->verify.decoder)) {
if(!error)
encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA;
error = true;
}
}
if(0 != encoder->private_->file) {
if(encoder->private_->file != stdout)
fclose(encoder->private_->file);
encoder->private_->file = 0;
}
#if FLAC__HAS_OGG
if(encoder->private_->is_ogg)
FLAC__ogg_encoder_aspect_finish(&encoder->protected_->ogg_encoder_aspect);
#endif
free_(encoder);
set_defaults_(encoder);
if(!error)
encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
return !error;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_ogg_serial_number(FLAC__StreamEncoder *encoder, long value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
#if FLAC__HAS_OGG
/* can't check encoder->private_->is_ogg since that's not set until init time */
FLAC__ogg_encoder_aspect_set_serial_number(&encoder->protected_->ogg_encoder_aspect, value);
return true;
#else
(void)value;
return false;
#endif
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_verify(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
#ifndef FLAC__MANDATORY_VERIFY_WHILE_ENCODING
encoder->protected_->verify = value;
#endif
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_streamable_subset(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->streamable_subset = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_do_md5(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->do_md5 = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_channels(FLAC__StreamEncoder *encoder, unsigned value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->channels = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_bits_per_sample(FLAC__StreamEncoder *encoder, unsigned value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->bits_per_sample = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_sample_rate(FLAC__StreamEncoder *encoder, unsigned value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->sample_rate = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_compression_level(FLAC__StreamEncoder *encoder, unsigned value)
{
FLAC__bool ok = true;
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
if(value >= sizeof(compression_levels_)/sizeof(compression_levels_[0]))
value = sizeof(compression_levels_)/sizeof(compression_levels_[0]) - 1;
ok &= FLAC__stream_encoder_set_do_mid_side_stereo (encoder, compression_levels_[value].do_mid_side_stereo);
ok &= FLAC__stream_encoder_set_loose_mid_side_stereo (encoder, compression_levels_[value].loose_mid_side_stereo);
#ifndef FLAC__INTEGER_ONLY_LIBRARY
#if 0
/* was: */
ok &= FLAC__stream_encoder_set_apodization (encoder, compression_levels_[value].apodization);
/* but it's too hard to specify the string in a locale-specific way */
#else
encoder->protected_->num_apodizations = 1;
encoder->protected_->apodizations[0].type = FLAC__APODIZATION_TUKEY;
encoder->protected_->apodizations[0].parameters.tukey.p = 0.5;
#endif
#endif
ok &= FLAC__stream_encoder_set_max_lpc_order (encoder, compression_levels_[value].max_lpc_order);
ok &= FLAC__stream_encoder_set_qlp_coeff_precision (encoder, compression_levels_[value].qlp_coeff_precision);
ok &= FLAC__stream_encoder_set_do_qlp_coeff_prec_search (encoder, compression_levels_[value].do_qlp_coeff_prec_search);
ok &= FLAC__stream_encoder_set_do_escape_coding (encoder, compression_levels_[value].do_escape_coding);
ok &= FLAC__stream_encoder_set_do_exhaustive_model_search (encoder, compression_levels_[value].do_exhaustive_model_search);
ok &= FLAC__stream_encoder_set_min_residual_partition_order(encoder, compression_levels_[value].min_residual_partition_order);
ok &= FLAC__stream_encoder_set_max_residual_partition_order(encoder, compression_levels_[value].max_residual_partition_order);
ok &= FLAC__stream_encoder_set_rice_parameter_search_dist (encoder, compression_levels_[value].rice_parameter_search_dist);
return ok;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_blocksize(FLAC__StreamEncoder *encoder, unsigned value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->blocksize = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_do_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->do_mid_side_stereo = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_loose_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->loose_mid_side_stereo = value;
return true;
}
/*@@@@add to tests*/
FLAC_API FLAC__bool FLAC__stream_encoder_set_apodization(FLAC__StreamEncoder *encoder, const char *specification)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
FLAC__ASSERT(0 != specification);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
#ifdef FLAC__INTEGER_ONLY_LIBRARY
(void)specification; /* silently ignore since we haven't integerized; will always use a rectangular window */
#else
encoder->protected_->num_apodizations = 0;
while(1) {
const char *s = strchr(specification, ';');
const size_t n = s? (size_t)(s - specification) : strlen(specification);
if (n==8 && 0 == strncmp("bartlett" , specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BARTLETT;
else if(n==13 && 0 == strncmp("bartlett_hann", specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BARTLETT_HANN;
else if(n==8 && 0 == strncmp("blackman" , specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BLACKMAN;
else if(n==26 && 0 == strncmp("blackman_harris_4term_92db", specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BLACKMAN_HARRIS_4TERM_92DB_SIDELOBE;
else if(n==6 && 0 == strncmp("connes" , specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_CONNES;
else if(n==7 && 0 == strncmp("flattop" , specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_FLATTOP;
else if(n>7 && 0 == strncmp("gauss(" , specification, 6)) {
FLAC__real stddev = (FLAC__real)strtod(specification+6, 0);
if (stddev > 0.0 && stddev <= 0.5) {
encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.gauss.stddev = stddev;
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_GAUSS;
}
}
else if(n==7 && 0 == strncmp("hamming" , specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_HAMMING;
else if(n==4 && 0 == strncmp("hann" , specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_HANN;
else if(n==13 && 0 == strncmp("kaiser_bessel", specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_KAISER_BESSEL;
else if(n==7 && 0 == strncmp("nuttall" , specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_NUTTALL;
else if(n==9 && 0 == strncmp("rectangle" , specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_RECTANGLE;
else if(n==8 && 0 == strncmp("triangle" , specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_TRIANGLE;
else if(n>7 && 0 == strncmp("tukey(" , specification, 6)) {
FLAC__real p = (FLAC__real)strtod(specification+6, 0);
if (p >= 0.0 && p <= 1.0) {
encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.tukey.p = p;
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_TUKEY;
}
}
else if(n==5 && 0 == strncmp("welch" , specification, n))
encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_WELCH;
if (encoder->protected_->num_apodizations == 32)
break;
if (s)
specification = s+1;
else
break;
}
if(encoder->protected_->num_apodizations == 0) {
encoder->protected_->num_apodizations = 1;
encoder->protected_->apodizations[0].type = FLAC__APODIZATION_TUKEY;
encoder->protected_->apodizations[0].parameters.tukey.p = 0.5;
}
#endif
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_max_lpc_order(FLAC__StreamEncoder *encoder, unsigned value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->max_lpc_order = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_qlp_coeff_precision(FLAC__StreamEncoder *encoder, unsigned value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->qlp_coeff_precision = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_do_qlp_coeff_prec_search(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->do_qlp_coeff_prec_search = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_do_escape_coding(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
#if 0
/*@@@ deprecated: */
encoder->protected_->do_escape_coding = value;
#else
(void)value;
#endif
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_do_exhaustive_model_search(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->do_exhaustive_model_search = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_min_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->min_residual_partition_order = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_max_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->max_residual_partition_order = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_rice_parameter_search_dist(FLAC__StreamEncoder *encoder, unsigned value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
#if 0
/*@@@ deprecated: */
encoder->protected_->rice_parameter_search_dist = value;
#else
(void)value;
#endif
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_total_samples_estimate(FLAC__StreamEncoder *encoder, FLAC__uint64 value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->protected_->total_samples_estimate = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_set_metadata(FLAC__StreamEncoder *encoder, FLAC__StreamMetadata **metadata, unsigned num_blocks)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
if(0 == metadata)
num_blocks = 0;
if(0 == num_blocks)
metadata = 0;
/* realloc() does not do exactly what we want so... */
if(encoder->protected_->metadata) {
free(encoder->protected_->metadata);
encoder->protected_->metadata = 0;
encoder->protected_->num_metadata_blocks = 0;
}
if(num_blocks) {
FLAC__StreamMetadata **m;
if(0 == (m = safe_malloc_mul_2op_p(sizeof(m[0]), /*times*/num_blocks)))
return false;
memcpy(m, metadata, sizeof(m[0]) * num_blocks);
encoder->protected_->metadata = m;
encoder->protected_->num_metadata_blocks = num_blocks;
}
#if FLAC__HAS_OGG
if(!FLAC__ogg_encoder_aspect_set_num_metadata(&encoder->protected_->ogg_encoder_aspect, num_blocks))
return false;
#endif
return true;
}
/*
* These three functions are not static, but not publically exposed in
* include/FLAC/ either. They are used by the test suite.
*/
FLAC_API FLAC__bool FLAC__stream_encoder_disable_constant_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->private_->disable_constant_subframes = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_disable_fixed_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->private_->disable_fixed_subframes = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_disable_verbatim_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
return false;
encoder->private_->disable_verbatim_subframes = value;
return true;
}
FLAC_API FLAC__StreamEncoderState FLAC__stream_encoder_get_state(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->state;
}
FLAC_API FLAC__StreamDecoderState FLAC__stream_encoder_get_verify_decoder_state(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->verify)
return FLAC__stream_decoder_get_state(encoder->private_->verify.decoder);
else
return FLAC__STREAM_DECODER_UNINITIALIZED;
}
FLAC_API const char *FLAC__stream_encoder_get_resolved_state_string(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR)
return FLAC__StreamEncoderStateString[encoder->protected_->state];
else
return FLAC__stream_decoder_get_resolved_state_string(encoder->private_->verify.decoder);
}
FLAC_API void FLAC__stream_encoder_get_verify_decoder_error_stats(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_sample, unsigned *frame_number, unsigned *channel, unsigned *sample, FLAC__int32 *expected, FLAC__int32 *got)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
if(0 != absolute_sample)
*absolute_sample = encoder->private_->verify.error_stats.absolute_sample;
if(0 != frame_number)
*frame_number = encoder->private_->verify.error_stats.frame_number;
if(0 != channel)
*channel = encoder->private_->verify.error_stats.channel;
if(0 != sample)
*sample = encoder->private_->verify.error_stats.sample;
if(0 != expected)
*expected = encoder->private_->verify.error_stats.expected;
if(0 != got)
*got = encoder->private_->verify.error_stats.got;
}
FLAC_API FLAC__bool FLAC__stream_encoder_get_verify(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->verify;
}
FLAC_API FLAC__bool FLAC__stream_encoder_get_streamable_subset(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->streamable_subset;
}
FLAC_API FLAC__bool FLAC__stream_encoder_get_do_md5(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->do_md5;
}
FLAC_API unsigned FLAC__stream_encoder_get_channels(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->channels;
}
FLAC_API unsigned FLAC__stream_encoder_get_bits_per_sample(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->bits_per_sample;
}
FLAC_API unsigned FLAC__stream_encoder_get_sample_rate(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->sample_rate;
}
FLAC_API unsigned FLAC__stream_encoder_get_blocksize(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->blocksize;
}
FLAC_API FLAC__bool FLAC__stream_encoder_get_do_mid_side_stereo(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->do_mid_side_stereo;
}
FLAC_API FLAC__bool FLAC__stream_encoder_get_loose_mid_side_stereo(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->loose_mid_side_stereo;
}
FLAC_API unsigned FLAC__stream_encoder_get_max_lpc_order(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->max_lpc_order;
}
FLAC_API unsigned FLAC__stream_encoder_get_qlp_coeff_precision(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->qlp_coeff_precision;
}
FLAC_API FLAC__bool FLAC__stream_encoder_get_do_qlp_coeff_prec_search(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->do_qlp_coeff_prec_search;
}
FLAC_API FLAC__bool FLAC__stream_encoder_get_do_escape_coding(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->do_escape_coding;
}
FLAC_API FLAC__bool FLAC__stream_encoder_get_do_exhaustive_model_search(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->do_exhaustive_model_search;
}
FLAC_API unsigned FLAC__stream_encoder_get_min_residual_partition_order(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->min_residual_partition_order;
}
FLAC_API unsigned FLAC__stream_encoder_get_max_residual_partition_order(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->max_residual_partition_order;
}
FLAC_API unsigned FLAC__stream_encoder_get_rice_parameter_search_dist(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->rice_parameter_search_dist;
}
FLAC_API FLAC__uint64 FLAC__stream_encoder_get_total_samples_estimate(const FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
return encoder->protected_->total_samples_estimate;
}
FLAC_API FLAC__bool FLAC__stream_encoder_process(FLAC__StreamEncoder *encoder, const FLAC__int32 * const buffer[], unsigned samples)
{
unsigned i, j = 0, channel;
const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
do {
const unsigned n = flac_min(blocksize+OVERREAD_-encoder->private_->current_sample_number, samples-j);
if(encoder->protected_->verify)
append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, n);
for(channel = 0; channel < channels; channel++)
memcpy(&encoder->private_->integer_signal[channel][encoder->private_->current_sample_number], &buffer[channel][j], sizeof(buffer[channel][0]) * n);
if(encoder->protected_->do_mid_side_stereo) {
FLAC__ASSERT(channels == 2);
/* "i <= blocksize" to overread 1 sample; see comment in OVERREAD_ decl */
for(i = encoder->private_->current_sample_number; i <= blocksize && j < samples; i++, j++) {
encoder->private_->integer_signal_mid_side[1][i] = buffer[0][j] - buffer[1][j];
encoder->private_->integer_signal_mid_side[0][i] = (buffer[0][j] + buffer[1][j]) >> 1; /* NOTE: not the same as 'mid = (buffer[0][j] + buffer[1][j]) / 2' ! */
}
}
else
j += n;
encoder->private_->current_sample_number += n;
/* we only process if we have a full block + 1 extra sample; final block is always handled by FLAC__stream_encoder_finish() */
if(encoder->private_->current_sample_number > blocksize) {
FLAC__ASSERT(encoder->private_->current_sample_number == blocksize+OVERREAD_);
FLAC__ASSERT(OVERREAD_ == 1); /* assert we only overread 1 sample which simplifies the rest of the code below */
if(!process_frame_(encoder, /*is_fractional_block=*/false, /*is_last_block=*/false))
return false;
/* move unprocessed overread samples to beginnings of arrays */
for(channel = 0; channel < channels; channel++)
encoder->private_->integer_signal[channel][0] = encoder->private_->integer_signal[channel][blocksize];
if(encoder->protected_->do_mid_side_stereo) {
encoder->private_->integer_signal_mid_side[0][0] = encoder->private_->integer_signal_mid_side[0][blocksize];
encoder->private_->integer_signal_mid_side[1][0] = encoder->private_->integer_signal_mid_side[1][blocksize];
}
encoder->private_->current_sample_number = 1;
}
} while(j < samples);
return true;
}
FLAC_API FLAC__bool FLAC__stream_encoder_process_interleaved(FLAC__StreamEncoder *encoder, const FLAC__int32 buffer[], unsigned samples)
{
unsigned i, j, k, channel;
FLAC__int32 x, mid, side;
const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
j = k = 0;
/*
* we have several flavors of the same basic loop, optimized for
* different conditions:
*/
if(encoder->protected_->do_mid_side_stereo && channels == 2) {
/*
* stereo coding: unroll channel loop
*/
do {
if(encoder->protected_->verify)
append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, flac_min(blocksize+OVERREAD_-encoder->private_->current_sample_number, samples-j));
/* "i <= blocksize" to overread 1 sample; see comment in OVERREAD_ decl */
for(i = encoder->private_->current_sample_number; i <= blocksize && j < samples; i++, j++) {
encoder->private_->integer_signal[0][i] = mid = side = buffer[k++];
x = buffer[k++];
encoder->private_->integer_signal[1][i] = x;
mid += x;
side -= x;
mid >>= 1; /* NOTE: not the same as 'mid = (left + right) / 2' ! */
encoder->private_->integer_signal_mid_side[1][i] = side;
encoder->private_->integer_signal_mid_side[0][i] = mid;
}
encoder->private_->current_sample_number = i;
/* we only process if we have a full block + 1 extra sample; final block is always handled by FLAC__stream_encoder_finish() */
if(i > blocksize) {
if(!process_frame_(encoder, /*is_fractional_block=*/false, /*is_last_block=*/false))
return false;
/* move unprocessed overread samples to beginnings of arrays */
FLAC__ASSERT(i == blocksize+OVERREAD_);
FLAC__ASSERT(OVERREAD_ == 1); /* assert we only overread 1 sample which simplifies the rest of the code below */
encoder->private_->integer_signal[0][0] = encoder->private_->integer_signal[0][blocksize];
encoder->private_->integer_signal[1][0] = encoder->private_->integer_signal[1][blocksize];
encoder->private_->integer_signal_mid_side[0][0] = encoder->private_->integer_signal_mid_side[0][blocksize];
encoder->private_->integer_signal_mid_side[1][0] = encoder->private_->integer_signal_mid_side[1][blocksize];
encoder->private_->current_sample_number = 1;
}
} while(j < samples);
}
else {
/*
* independent channel coding: buffer each channel in inner loop
*/
do {
if(encoder->protected_->verify)
append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, flac_min(blocksize+OVERREAD_-encoder->private_->current_sample_number, samples-j));
/* "i <= blocksize" to overread 1 sample; see comment in OVERREAD_ decl */
for(i = encoder->private_->current_sample_number; i <= blocksize && j < samples; i++, j++) {
for(channel = 0; channel < channels; channel++)
encoder->private_->integer_signal[channel][i] = buffer[k++];
}
encoder->private_->current_sample_number = i;
/* we only process if we have a full block + 1 extra sample; final block is always handled by FLAC__stream_encoder_finish() */
if(i > blocksize) {
if(!process_frame_(encoder, /*is_fractional_block=*/false, /*is_last_block=*/false))
return false;
/* move unprocessed overread samples to beginnings of arrays */
FLAC__ASSERT(i == blocksize+OVERREAD_);
FLAC__ASSERT(OVERREAD_ == 1); /* assert we only overread 1 sample which simplifies the rest of the code below */
for(channel = 0; channel < channels; channel++)
encoder->private_->integer_signal[channel][0] = encoder->private_->integer_signal[channel][blocksize];
encoder->private_->current_sample_number = 1;
}
} while(j < samples);
}
return true;
}
/***********************************************************************
*
* Private class methods
*
***********************************************************************/
void set_defaults_(FLAC__StreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
#ifdef FLAC__MANDATORY_VERIFY_WHILE_ENCODING
encoder->protected_->verify = true;
#else
encoder->protected_->verify = false;
#endif
encoder->protected_->streamable_subset = true;
encoder->protected_->do_md5 = true;
encoder->protected_->do_mid_side_stereo = false;
encoder->protected_->loose_mid_side_stereo = false;
encoder->protected_->channels = 2;
encoder->protected_->bits_per_sample = 16;
encoder->protected_->sample_rate = 44100;
encoder->protected_->blocksize = 0;
#ifndef FLAC__INTEGER_ONLY_LIBRARY
encoder->protected_->num_apodizations = 1;
encoder->protected_->apodizations[0].type = FLAC__APODIZATION_TUKEY;
encoder->protected_->apodizations[0].parameters.tukey.p = 0.5;
#endif
encoder->protected_->max_lpc_order = 0;
encoder->protected_->qlp_coeff_precision = 0;
encoder->protected_->do_qlp_coeff_prec_search = false;
encoder->protected_->do_exhaustive_model_search = false;
encoder->protected_->do_escape_coding = false;
encoder->protected_->min_residual_partition_order = 0;
encoder->protected_->max_residual_partition_order = 0;
encoder->protected_->rice_parameter_search_dist = 0;
encoder->protected_->total_samples_estimate = 0;
encoder->protected_->metadata = 0;
encoder->protected_->num_metadata_blocks = 0;
encoder->private_->seek_table = 0;
encoder->private_->disable_constant_subframes = false;
encoder->private_->disable_fixed_subframes = false;
encoder->private_->disable_verbatim_subframes = false;
#if FLAC__HAS_OGG
encoder->private_->is_ogg = false;
#endif
encoder->private_->read_callback = 0;
encoder->private_->write_callback = 0;
encoder->private_->seek_callback = 0;
encoder->private_->tell_callback = 0;
encoder->private_->metadata_callback = 0;
encoder->private_->progress_callback = 0;
encoder->private_->client_data = 0;
#if FLAC__HAS_OGG
FLAC__ogg_encoder_aspect_set_defaults(&encoder->protected_->ogg_encoder_aspect);
#endif
FLAC__stream_encoder_set_compression_level(encoder, 5);
}
void free_(FLAC__StreamEncoder *encoder)
{
unsigned i, channel;
FLAC__ASSERT(0 != encoder);
if(encoder->protected_->metadata) {
free(encoder->protected_->metadata);
encoder->protected_->metadata = 0;
encoder->protected_->num_metadata_blocks = 0;
}
for(i = 0; i < encoder->protected_->channels; i++) {
if(0 != encoder->private_->integer_signal_unaligned[i]) {
free(encoder->private_->integer_signal_unaligned[i]);
encoder->private_->integer_signal_unaligned[i] = 0;
}
#ifndef FLAC__INTEGER_ONLY_LIBRARY
if(0 != encoder->private_->real_signal_unaligned[i]) {
free(encoder->private_->real_signal_unaligned[i]);
encoder->private_->real_signal_unaligned[i] = 0;
}
#endif
}
for(i = 0; i < 2; i++) {
if(0 != encoder->private_->integer_signal_mid_side_unaligned[i]) {
free(encoder->private_->integer_signal_mid_side_unaligned[i]);
encoder->private_->integer_signal_mid_side_unaligned[i] = 0;
}
#ifndef FLAC__INTEGER_ONLY_LIBRARY
if(0 != encoder->private_->real_signal_mid_side_unaligned[i]) {
free(encoder->private_->real_signal_mid_side_unaligned[i]);
encoder->private_->real_signal_mid_side_unaligned[i] = 0;
}
#endif
}
#ifndef FLAC__INTEGER_ONLY_LIBRARY
for(i = 0; i < encoder->protected_->num_apodizations; i++) {
if(0 != encoder->private_->window_unaligned[i]) {
free(encoder->private_->window_unaligned[i]);
encoder->private_->window_unaligned[i] = 0;
}
}
if(0 != encoder->private_->windowed_signal_unaligned) {
free(encoder->private_->windowed_signal_unaligned);
encoder->private_->windowed_signal_unaligned = 0;
}
#endif
for(channel = 0; channel < encoder->protected_->channels; channel++) {
for(i = 0; i < 2; i++) {
if(0 != encoder->private_->residual_workspace_unaligned[channel][i]) {
free(encoder->private_->residual_workspace_unaligned[channel][i]);
encoder->private_->residual_workspace_unaligned[channel][i] = 0;
}
}
}
for(channel = 0; channel < 2; channel++) {
for(i = 0; i < 2; i++) {
if(0 != encoder->private_->residual_workspace_mid_side_unaligned[channel][i]) {
free(encoder->private_->residual_workspace_mid_side_unaligned[channel][i]);
encoder->private_->residual_workspace_mid_side_unaligned[channel][i] = 0;
}
}
}
if(0 != encoder->private_->abs_residual_partition_sums_unaligned) {
free(encoder->private_->abs_residual_partition_sums_unaligned);
encoder->private_->abs_residual_partition_sums_unaligned = 0;
}
if(0 != encoder->private_->raw_bits_per_partition_unaligned) {
free(encoder->private_->raw_bits_per_partition_unaligned);
encoder->private_->raw_bits_per_partition_unaligned = 0;
}
if(encoder->protected_->verify) {
for(i = 0; i < encoder->protected_->channels; i++) {
if(0 != encoder->private_->verify.input_fifo.data[i]) {
free(encoder->private_->verify.input_fifo.data[i]);
encoder->private_->verify.input_fifo.data[i] = 0;
}
}
}
FLAC__bitwriter_free(encoder->private_->frame);
}
FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_blocksize)
{
FLAC__bool ok;
unsigned i, channel;
FLAC__ASSERT(new_blocksize > 0);
FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
FLAC__ASSERT(encoder->private_->current_sample_number == 0);
/* To avoid excessive malloc'ing, we only grow the buffer; no shrinking. */
if(new_blocksize <= encoder->private_->input_capacity)
return true;
ok = true;
/* WATCHOUT: FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx()
* requires that the input arrays (in our case the integer signals)
* have a buffer of up to 3 zeroes in front (at negative indices) for
* alignment purposes; we use 4 in front to keep the data well-aligned.
*/
for(i = 0; ok && i < encoder->protected_->channels; i++) {
ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize+4+OVERREAD_, &encoder->private_->integer_signal_unaligned[i], &encoder->private_->integer_signal[i]);
memset(encoder->private_->integer_signal[i], 0, sizeof(FLAC__int32)*4);
encoder->private_->integer_signal[i] += 4;
#ifndef FLAC__INTEGER_ONLY_LIBRARY
#if 0 /* @@@ currently unused */
if(encoder->protected_->max_lpc_order > 0)
ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize+OVERREAD_, &encoder->private_->real_signal_unaligned[i], &encoder->private_->real_signal[i]);
#endif
#endif
}
for(i = 0; ok && i < 2; i++) {
ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize+4+OVERREAD_, &encoder->private_->integer_signal_mid_side_unaligned[i], &encoder->private_->integer_signal_mid_side[i]);
memset(encoder->private_->integer_signal_mid_side[i], 0, sizeof(FLAC__int32)*4);
encoder->private_->integer_signal_mid_side[i] += 4;
#ifndef FLAC__INTEGER_ONLY_LIBRARY
#if 0 /* @@@ currently unused */
if(encoder->protected_->max_lpc_order > 0)
ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize+OVERREAD_, &encoder->private_->real_signal_mid_side_unaligned[i], &encoder->private_->real_signal_mid_side[i]);
#endif
#endif
}
#ifndef FLAC__INTEGER_ONLY_LIBRARY
if(ok && encoder->protected_->max_lpc_order > 0) {
for(i = 0; ok && i < encoder->protected_->num_apodizations; i++)
ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->window_unaligned[i], &encoder->private_->window[i]);
ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->windowed_signal_unaligned, &encoder->private_->windowed_signal);
}
#endif
for(channel = 0; ok && channel < encoder->protected_->channels; channel++) {
for(i = 0; ok && i < 2; i++) {
ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize, &encoder->private_->residual_workspace_unaligned[channel][i], &encoder->private_->residual_workspace[channel][i]);
}
}
for(channel = 0; ok && channel < 2; channel++) {
for(i = 0; ok && i < 2; i++) {
ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize, &encoder->private_->residual_workspace_mid_side_unaligned[channel][i], &encoder->private_->residual_workspace_mid_side[channel][i]);
}
}
/* the *2 is an approximation to the series 1 + 1/2 + 1/4 + ... that sums tree occupies in a flat array */
/*@@@ new_blocksize*2 is too pessimistic, but to fix, we need smarter logic because a smaller new_blocksize can actually increase the # of partitions; would require moving this out into a separate function, then checking its capacity against the need of the current blocksize&min/max_partition_order (and maybe predictor order) */
ok = ok && FLAC__memory_alloc_aligned_uint64_array(new_blocksize * 2, &encoder->private_->abs_residual_partition_sums_unaligned, &encoder->private_->abs_residual_partition_sums);
if(encoder->protected_->do_escape_coding)
ok = ok && FLAC__memory_alloc_aligned_unsigned_array(new_blocksize * 2, &encoder->private_->raw_bits_per_partition_unaligned, &encoder->private_->raw_bits_per_partition);
/* now adjust the windows if the blocksize has changed */
#ifndef FLAC__INTEGER_ONLY_LIBRARY
if(ok && new_blocksize != encoder->private_->input_capacity && encoder->protected_->max_lpc_order > 0) {
for(i = 0; ok && i < encoder->protected_->num_apodizations; i++) {
switch(encoder->protected_->apodizations[i].type) {
case FLAC__APODIZATION_BARTLETT:
FLAC__window_bartlett(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_BARTLETT_HANN:
FLAC__window_bartlett_hann(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_BLACKMAN:
FLAC__window_blackman(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_BLACKMAN_HARRIS_4TERM_92DB_SIDELOBE:
FLAC__window_blackman_harris_4term_92db_sidelobe(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_CONNES:
FLAC__window_connes(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_FLATTOP:
FLAC__window_flattop(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_GAUSS:
FLAC__window_gauss(encoder->private_->window[i], new_blocksize, encoder->protected_->apodizations[i].parameters.gauss.stddev);
break;
case FLAC__APODIZATION_HAMMING:
FLAC__window_hamming(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_HANN:
FLAC__window_hann(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_KAISER_BESSEL:
FLAC__window_kaiser_bessel(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_NUTTALL:
FLAC__window_nuttall(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_RECTANGLE:
FLAC__window_rectangle(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_TRIANGLE:
FLAC__window_triangle(encoder->private_->window[i], new_blocksize);
break;
case FLAC__APODIZATION_TUKEY:
FLAC__window_tukey(encoder->private_->window[i], new_blocksize, encoder->protected_->apodizations[i].parameters.tukey.p);
break;
case FLAC__APODIZATION_WELCH:
FLAC__window_welch(encoder->private_->window[i], new_blocksize);
break;
default:
FLAC__ASSERT(0);
/* double protection */
FLAC__window_hann(encoder->private_->window[i], new_blocksize);
break;
}
}
}
#endif
if(ok)
encoder->private_->input_capacity = new_blocksize;
else
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
return ok;
}
FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples, FLAC__bool is_last_block)
{
const FLAC__byte *buffer;
size_t bytes;
FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(encoder->private_->frame));
if(!FLAC__bitwriter_get_buffer(encoder->private_->frame, &buffer, &bytes)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
return false;
}
if(encoder->protected_->verify) {
encoder->private_->verify.output.data = buffer;
encoder->private_->verify.output.bytes = bytes;
if(encoder->private_->verify.state_hint == ENCODER_IN_MAGIC) {
encoder->private_->verify.needs_magic_hack = true;
}
else {
if(!FLAC__stream_decoder_process_single(encoder->private_->verify.decoder)) {
FLAC__bitwriter_release_buffer(encoder->private_->frame);
FLAC__bitwriter_clear(encoder->private_->frame);
if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA)
encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
return false;
}
}
}
if(write_frame_(encoder, buffer, bytes, samples, is_last_block) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
FLAC__bitwriter_release_buffer(encoder->private_->frame);
FLAC__bitwriter_clear(encoder->private_->frame);
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return false;
}
FLAC__bitwriter_release_buffer(encoder->private_->frame);
FLAC__bitwriter_clear(encoder->private_->frame);
if(samples > 0) {
encoder->private_->streaminfo.data.stream_info.min_framesize = flac_min(bytes, encoder->private_->streaminfo.data.stream_info.min_framesize);
encoder->private_->streaminfo.data.stream_info.max_framesize = flac_max(bytes, encoder->private_->streaminfo.data.stream_info.max_framesize);
}
return true;
}
FLAC__StreamEncoderWriteStatus write_frame_(FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, FLAC__bool is_last_block)
{
FLAC__StreamEncoderWriteStatus status;
FLAC__uint64 output_position = 0;
#if FLAC__HAS_OGG == 0
(void)is_last_block;
#endif
/* FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED just means we didn't get the offset; no error */
if(encoder->private_->tell_callback && encoder->private_->tell_callback(encoder, &output_position, encoder->private_->client_data) == FLAC__STREAM_ENCODER_TELL_STATUS_ERROR) {
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
}
/*
* Watch for the STREAMINFO block and first SEEKTABLE block to go by and store their offsets.
*/
if(samples == 0) {
FLAC__MetadataType type = (buffer[0] & 0x7f);
if(type == FLAC__METADATA_TYPE_STREAMINFO)
encoder->protected_->streaminfo_offset = output_position;
else if(type == FLAC__METADATA_TYPE_SEEKTABLE && encoder->protected_->seektable_offset == 0)
encoder->protected_->seektable_offset = output_position;
}
/*
* Mark the current seek point if hit (if audio_offset == 0 that
* means we're still writing metadata and haven't hit the first
* frame yet)
*/
if(0 != encoder->private_->seek_table && encoder->protected_->audio_offset > 0 && encoder->private_->seek_table->num_points > 0) {
const unsigned blocksize = FLAC__stream_encoder_get_blocksize(encoder);
const FLAC__uint64 frame_first_sample = encoder->private_->samples_written;
const FLAC__uint64 frame_last_sample = frame_first_sample + (FLAC__uint64)blocksize - 1;
FLAC__uint64 test_sample;
unsigned i;
for(i = encoder->private_->first_seekpoint_to_check; i < encoder->private_->seek_table->num_points; i++) {
test_sample = encoder->private_->seek_table->points[i].sample_number;
if(test_sample > frame_last_sample) {
break;
}
else if(test_sample >= frame_first_sample) {
encoder->private_->seek_table->points[i].sample_number = frame_first_sample;
encoder->private_->seek_table->points[i].stream_offset = output_position - encoder->protected_->audio_offset;
encoder->private_->seek_table->points[i].frame_samples = blocksize;
encoder->private_->first_seekpoint_to_check++;
/* DO NOT: "break;" and here's why:
* The seektable template may contain more than one target
* sample for any given frame; we will keep looping, generating
* duplicate seekpoints for them, and we'll clean it up later,
* just before writing the seektable back to the metadata.
*/
}
else {
encoder->private_->first_seekpoint_to_check++;
}
}
}
#if FLAC__HAS_OGG
if(encoder->private_->is_ogg) {
status = FLAC__ogg_encoder_aspect_write_callback_wrapper(
&encoder->protected_->ogg_encoder_aspect,
buffer,
bytes,
samples,
encoder->private_->current_frame_number,
is_last_block,
(FLAC__OggEncoderAspectWriteCallbackProxy)encoder->private_->write_callback,
encoder,
encoder->private_->client_data
);
}
else
#endif
status = encoder->private_->write_callback(encoder, buffer, bytes, samples, encoder->private_->current_frame_number, encoder->private_->client_data);
if(status == FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
encoder->private_->bytes_written += bytes;
encoder->private_->samples_written += samples;
/* we keep a high watermark on the number of frames written because
* when the encoder goes back to write metadata, 'current_frame'
* will drop back to 0.
*/
encoder->private_->frames_written = flac_max(encoder->private_->frames_written, encoder->private_->current_frame_number+1);
}
else
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return status;
}
/* Gets called when the encoding process has finished so that we can update the STREAMINFO and SEEKTABLE blocks. */
void update_metadata_(const FLAC__StreamEncoder *encoder)
{
FLAC__byte b[flac_max(6u, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)];
const FLAC__StreamMetadata *metadata = &encoder->private_->streaminfo;
const FLAC__uint64 samples = metadata->data.stream_info.total_samples;
const unsigned min_framesize = metadata->data.stream_info.min_framesize;
const unsigned max_framesize = metadata->data.stream_info.max_framesize;
const unsigned bps = metadata->data.stream_info.bits_per_sample;
FLAC__StreamEncoderSeekStatus seek_status;
FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
/* All this is based on intimate knowledge of the stream header
* layout, but a change to the header format that would break this
* would also break all streams encoded in the previous format.
*/
/*
* Write MD5 signature
*/
{
const unsigned md5_offset =
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN
) / 8;
if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + md5_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return;
}
if(encoder->private_->write_callback(encoder, metadata->data.stream_info.md5sum, 16, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return;
}
}
/*
* Write total samples
*/
{
const unsigned total_samples_byte_offset =
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN
- 4
) / 8;
b[0] = ((FLAC__byte)(bps-1) << 4) | (FLAC__byte)((samples >> 32) & 0x0F);
b[1] = (FLAC__byte)((samples >> 24) & 0xFF);
b[2] = (FLAC__byte)((samples >> 16) & 0xFF);
b[3] = (FLAC__byte)((samples >> 8) & 0xFF);
b[4] = (FLAC__byte)(samples & 0xFF);
if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + total_samples_byte_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return;
}
if(encoder->private_->write_callback(encoder, b, 5, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return;
}
}
/*
* Write min/max framesize
*/
{
const unsigned min_framesize_offset =
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN
) / 8;
b[0] = (FLAC__byte)((min_framesize >> 16) & 0xFF);
b[1] = (FLAC__byte)((min_framesize >> 8) & 0xFF);
b[2] = (FLAC__byte)(min_framesize & 0xFF);
b[3] = (FLAC__byte)((max_framesize >> 16) & 0xFF);
b[4] = (FLAC__byte)((max_framesize >> 8) & 0xFF);
b[5] = (FLAC__byte)(max_framesize & 0xFF);
if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + min_framesize_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return;
}
if(encoder->private_->write_callback(encoder, b, 6, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return;
}
}
/*
* Write seektable
*/
if(0 != encoder->private_->seek_table && encoder->private_->seek_table->num_points > 0 && encoder->protected_->seektable_offset > 0) {
unsigned i;
FLAC__format_seektable_sort(encoder->private_->seek_table);
FLAC__ASSERT(FLAC__format_seektable_is_legal(encoder->private_->seek_table));
if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->seektable_offset + FLAC__STREAM_METADATA_HEADER_LENGTH, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return;
}
for(i = 0; i < encoder->private_->seek_table->num_points; i++) {
FLAC__uint64 xx;
unsigned x;
xx = encoder->private_->seek_table->points[i].sample_number;
b[7] = (FLAC__byte)xx; xx >>= 8;
b[6] = (FLAC__byte)xx; xx >>= 8;
b[5] = (FLAC__byte)xx; xx >>= 8;
b[4] = (FLAC__byte)xx; xx >>= 8;
b[3] = (FLAC__byte)xx; xx >>= 8;
b[2] = (FLAC__byte)xx; xx >>= 8;
b[1] = (FLAC__byte)xx; xx >>= 8;
b[0] = (FLAC__byte)xx; xx >>= 8;
xx = encoder->private_->seek_table->points[i].stream_offset;
b[15] = (FLAC__byte)xx; xx >>= 8;
b[14] = (FLAC__byte)xx; xx >>= 8;
b[13] = (FLAC__byte)xx; xx >>= 8;
b[12] = (FLAC__byte)xx; xx >>= 8;
b[11] = (FLAC__byte)xx; xx >>= 8;
b[10] = (FLAC__byte)xx; xx >>= 8;
b[9] = (FLAC__byte)xx; xx >>= 8;
b[8] = (FLAC__byte)xx; xx >>= 8;
x = encoder->private_->seek_table->points[i].frame_samples;
b[17] = (FLAC__byte)x; x >>= 8;
b[16] = (FLAC__byte)x; x >>= 8;
if(encoder->private_->write_callback(encoder, b, 18, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
return;
}
}
}
}
#if FLAC__HAS_OGG
/* Gets called when the encoding process has finished so that we can update the STREAMINFO and SEEKTABLE blocks. */
void update_ogg_metadata_(FLAC__StreamEncoder *encoder)
{
/* the # of bytes in the 1st packet that precede the STREAMINFO */
static const unsigned FIRST_OGG_PACKET_STREAMINFO_PREFIX_LENGTH =
FLAC__OGG_MAPPING_PACKET_TYPE_LENGTH +
FLAC__OGG_MAPPING_MAGIC_LENGTH +
FLAC__OGG_MAPPING_VERSION_MAJOR_LENGTH +
FLAC__OGG_MAPPING_VERSION_MINOR_LENGTH +
FLAC__OGG_MAPPING_NUM_HEADERS_LENGTH +
FLAC__STREAM_SYNC_LENGTH
;
FLAC__byte b[flac_max(6u, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)];
const FLAC__StreamMetadata *metadata = &encoder->private_->streaminfo;
const FLAC__uint64 samples = metadata->data.stream_info.total_samples;
const unsigned min_framesize = metadata->data.stream_info.min_framesize;
const unsigned max_framesize = metadata->data.stream_info.max_framesize;
ogg_page page;
FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
FLAC__ASSERT(0 != encoder->private_->seek_callback);
/* Pre-check that client supports seeking, since we don't want the
* ogg_helper code to ever have to deal with this condition.
*/
if(encoder->private_->seek_callback(encoder, 0, encoder->private_->client_data) == FLAC__STREAM_ENCODER_SEEK_STATUS_UNSUPPORTED)
return;
/* All this is based on intimate knowledge of the stream header
* layout, but a change to the header format that would break this
* would also break all streams encoded in the previous format.
*/
/**
** Write STREAMINFO stats
**/
simple_ogg_page__init(&page);
if(!simple_ogg_page__get_at(encoder, encoder->protected_->streaminfo_offset, &page, encoder->private_->seek_callback, encoder->private_->read_callback, encoder->private_->client_data)) {
simple_ogg_page__clear(&page);
return; /* state already set */
}
/*
* Write MD5 signature
*/
{
const unsigned md5_offset =
FIRST_OGG_PACKET_STREAMINFO_PREFIX_LENGTH +
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN
) / 8;
if(md5_offset + 16 > (unsigned)page.body_len) {
encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
simple_ogg_page__clear(&page);
return;
}
memcpy(page.body + md5_offset, metadata->data.stream_info.md5sum, 16);
}
/*
* Write total samples
*/
{
const unsigned total_samples_byte_offset =
FIRST_OGG_PACKET_STREAMINFO_PREFIX_LENGTH +
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN
- 4
) / 8;
if(total_samples_byte_offset + 5 > (unsigned)page.body_len) {
encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
simple_ogg_page__clear(&page);
return;
}
b[0] = (FLAC__byte)page.body[total_samples_byte_offset] & 0xF0;
b[0] |= (FLAC__byte)((samples >> 32) & 0x0F);
b[1] = (FLAC__byte)((samples >> 24) & 0xFF);
b[2] = (FLAC__byte)((samples >> 16) & 0xFF);
b[3] = (FLAC__byte)((samples >> 8) & 0xFF);
b[4] = (FLAC__byte)(samples & 0xFF);
memcpy(page.body + total_samples_byte_offset, b, 5);
}
/*
* Write min/max framesize
*/
{
const unsigned min_framesize_offset =
FIRST_OGG_PACKET_STREAMINFO_PREFIX_LENGTH +
FLAC__STREAM_METADATA_HEADER_LENGTH +
(
FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN
) / 8;
if(min_framesize_offset + 6 > (unsigned)page.body_len) {
encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
simple_ogg_page__clear(&page);
return;
}
b[0] = (FLAC__byte)((min_framesize >> 16) & 0xFF);
b[1] = (FLAC__byte)((min_framesize >> 8) & 0xFF);
b[2] = (FLAC__byte)(min_framesize & 0xFF);
b[3] = (FLAC__byte)((max_framesize >> 16) & 0xFF);
b[4] = (FLAC__byte)((max_framesize >> 8) & 0xFF);
b[5] = (FLAC__byte)(max_framesize & 0xFF);
memcpy(page.body + min_framesize_offset, b, 6);
}
if(!simple_ogg_page__set_at(encoder, encoder->protected_->streaminfo_offset, &page, encoder->private_->seek_callback, encoder->private_->write_callback, encoder->private_->client_data)) {
simple_ogg_page__clear(&page);
return; /* state already set */
}
simple_ogg_page__clear(&page);
/*
* Write seektable
*/
if(0 != encoder->private_->seek_table && encoder->private_->seek_table->num_points > 0 && encoder->protected_->seektable_offset > 0) {
unsigned i;
FLAC__byte *p;
FLAC__format_seektable_sort(encoder->private_->seek_table);
FLAC__ASSERT(FLAC__format_seektable_is_legal(encoder->private_->seek_table));
simple_ogg_page__init(&page);
if(!simple_ogg_page__get_at(encoder, encoder->protected_->seektable_offset, &page, encoder->private_->seek_callback, encoder->private_->read_callback, encoder->private_->client_data)) {
simple_ogg_page__clear(&page);
return; /* state already set */
}
if((FLAC__STREAM_METADATA_HEADER_LENGTH + 18*encoder->private_->seek_table->num_points) != (unsigned)page.body_len) {
encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
simple_ogg_page__clear(&page);
return;
}
for(i = 0, p = page.body + FLAC__STREAM_METADATA_HEADER_LENGTH; i < encoder->private_->seek_table->num_points; i++, p += 18) {
FLAC__uint64 xx;
unsigned x;
xx = encoder->private_->seek_table->points[i].sample_number;
b[7] = (FLAC__byte)xx; xx >>= 8;
b[6] = (FLAC__byte)xx; xx >>= 8;
b[5] = (FLAC__byte)xx; xx >>= 8;
b[4] = (FLAC__byte)xx; xx >>= 8;
b[3] = (FLAC__byte)xx; xx >>= 8;
b[2] = (FLAC__byte)xx; xx >>= 8;
b[1] = (FLAC__byte)xx; xx >>= 8;
b[0] = (FLAC__byte)xx; xx >>= 8;
xx = encoder->private_->seek_table->points[i].stream_offset;
b[15] = (FLAC__byte)xx; xx >>= 8;
b[14] = (FLAC__byte)xx; xx >>= 8;
b[13] = (FLAC__byte)xx; xx >>= 8;
b[12] = (FLAC__byte)xx; xx >>= 8;
b[11] = (FLAC__byte)xx; xx >>= 8;
b[10] = (FLAC__byte)xx; xx >>= 8;
b[9] = (FLAC__byte)xx; xx >>= 8;
b[8] = (FLAC__byte)xx; xx >>= 8;
x = encoder->private_->seek_table->points[i].frame_samples;
b[17] = (FLAC__byte)x; x >>= 8;
b[16] = (FLAC__byte)x; x >>= 8;
memcpy(p, b, 18);
}
if(!simple_ogg_page__set_at(encoder, encoder->protected_->seektable_offset, &page, encoder->private_->seek_callback, encoder->private_->write_callback, encoder->private_->client_data)) {
simple_ogg_page__clear(&page);
return; /* state already set */
}
simple_ogg_page__clear(&page);
}
}
#endif
FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block, FLAC__bool is_last_block)
{
FLAC__uint16 crc;
FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
/*
* Accumulate raw signal to the MD5 signature
*/
if(encoder->protected_->do_md5 && !FLAC__MD5Accumulate(&encoder->private_->md5context, (const FLAC__int32 * const *)encoder->private_->integer_signal, encoder->protected_->channels, encoder->protected_->blocksize, (encoder->protected_->bits_per_sample+7) / 8)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
return false;
}
/*
* Process the frame header and subframes into the frame bitbuffer
*/
if(!process_subframes_(encoder, is_fractional_block)) {
/* the above function sets the state for us in case of an error */
return false;
}
/*
* Zero-pad the frame to a byte_boundary
*/
if(!FLAC__bitwriter_zero_pad_to_byte_boundary(encoder->private_->frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
return false;
}
/*
* CRC-16 the whole thing
*/
FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(encoder->private_->frame));
if(
!FLAC__bitwriter_get_write_crc16(encoder->private_->frame, &crc) ||
!FLAC__bitwriter_write_raw_uint32(encoder->private_->frame, crc, FLAC__FRAME_FOOTER_CRC_LEN)
) {
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
return false;
}
/*
* Write it
*/
if(!write_bitbuffer_(encoder, encoder->protected_->blocksize, is_last_block)) {
/* the above function sets the state for us in case of an error */
return false;
}
/*
* Get ready for the next frame
*/
encoder->private_->current_sample_number = 0;
encoder->private_->current_frame_number++;
encoder->private_->streaminfo.data.stream_info.total_samples += (FLAC__uint64)encoder->protected_->blocksize;
return true;
}
FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block)
{
FLAC__FrameHeader frame_header;
unsigned channel, min_partition_order = encoder->protected_->min_residual_partition_order, max_partition_order;
FLAC__bool do_independent, do_mid_side;
/*
* Calculate the min,max Rice partition orders
*/
if(is_fractional_block) {
max_partition_order = 0;
}
else {
max_partition_order = FLAC__format_get_max_rice_partition_order_from_blocksize(encoder->protected_->blocksize);
max_partition_order = flac_min(max_partition_order, encoder->protected_->max_residual_partition_order);
}
min_partition_order = flac_min(min_partition_order, max_partition_order);
/*
* Setup the frame
*/
frame_header.blocksize = encoder->protected_->blocksize;
frame_header.sample_rate = encoder->protected_->sample_rate;
frame_header.channels = encoder->protected_->channels;
frame_header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT; /* the default unless the encoder determines otherwise */
frame_header.bits_per_sample = encoder->protected_->bits_per_sample;
frame_header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER;
frame_header.number.frame_number = encoder->private_->current_frame_number;
/*
* Figure out what channel assignments to try
*/
if(encoder->protected_->do_mid_side_stereo) {
if(encoder->protected_->loose_mid_side_stereo) {
if(encoder->private_->loose_mid_side_stereo_frame_count == 0) {
do_independent = true;
do_mid_side = true;
}
else {
do_independent = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT);
do_mid_side = !do_independent;
}
}
else {
do_independent = true;
do_mid_side = true;
}
}
else {
do_independent = true;
do_mid_side = false;
}
FLAC__ASSERT(do_independent || do_mid_side);
/*
* Check for wasted bits; set effective bps for each subframe
*/
if(do_independent) {
for(channel = 0; channel < encoder->protected_->channels; channel++) {
const unsigned w = get_wasted_bits_(encoder->private_->integer_signal[channel], encoder->protected_->blocksize);
encoder->private_->subframe_workspace[channel][0].wasted_bits = encoder->private_->subframe_workspace[channel][1].wasted_bits = w;
encoder->private_->subframe_bps[channel] = encoder->protected_->bits_per_sample - w;
}
}
if(do_mid_side) {
FLAC__ASSERT(encoder->protected_->channels == 2);
for(channel = 0; channel < 2; channel++) {
const unsigned w = get_wasted_bits_(encoder->private_->integer_signal_mid_side[channel], encoder->protected_->blocksize);
encoder->private_->subframe_workspace_mid_side[channel][0].wasted_bits = encoder->private_->subframe_workspace_mid_side[channel][1].wasted_bits = w;
encoder->private_->subframe_bps_mid_side[channel] = encoder->protected_->bits_per_sample - w + (channel==0? 0:1);
}
}
/*
* First do a normal encoding pass of each independent channel
*/
if(do_independent) {
for(channel = 0; channel < encoder->protected_->channels; channel++) {
if(!
process_subframe_(
encoder,
min_partition_order,
max_partition_order,
&frame_header,
encoder->private_->subframe_bps[channel],
encoder->private_->integer_signal[channel],
encoder->private_->subframe_workspace_ptr[channel],
encoder->private_->partitioned_rice_contents_workspace_ptr[channel],
encoder->private_->residual_workspace[channel],
encoder->private_->best_subframe+channel,
encoder->private_->best_subframe_bits+channel
)
)
return false;
}
}
/*
* Now do mid and side channels if requested
*/
if(do_mid_side) {
FLAC__ASSERT(encoder->protected_->channels == 2);
for(channel = 0; channel < 2; channel++) {
if(!
process_subframe_(
encoder,
min_partition_order,
max_partition_order,
&frame_header,
encoder->private_->subframe_bps_mid_side[channel],
encoder->private_->integer_signal_mid_side[channel],
encoder->private_->subframe_workspace_ptr_mid_side[channel],
encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[channel],
encoder->private_->residual_workspace_mid_side[channel],
encoder->private_->best_subframe_mid_side+channel,
encoder->private_->best_subframe_bits_mid_side+channel
)
)
return false;
}
}
/*
* Compose the frame bitbuffer
*/
if(do_mid_side) {
unsigned left_bps = 0, right_bps = 0; /* initialized only to prevent superfluous compiler warning */
FLAC__Subframe *left_subframe = 0, *right_subframe = 0; /* initialized only to prevent superfluous compiler warning */
FLAC__ChannelAssignment channel_assignment;
FLAC__ASSERT(encoder->protected_->channels == 2);
if(encoder->protected_->loose_mid_side_stereo && encoder->private_->loose_mid_side_stereo_frame_count > 0) {
channel_assignment = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT? FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT : FLAC__CHANNEL_ASSIGNMENT_MID_SIDE);
}
else {
unsigned bits[4]; /* WATCHOUT - indexed by FLAC__ChannelAssignment */
unsigned min_bits;
int ca;
FLAC__ASSERT(FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT == 0);
FLAC__ASSERT(FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE == 1);
FLAC__ASSERT(FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE == 2);
FLAC__ASSERT(FLAC__CHANNEL_ASSIGNMENT_MID_SIDE == 3);
FLAC__ASSERT(do_independent && do_mid_side);
/* We have to figure out which channel assignent results in the smallest frame */
bits[FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits [1];
bits[FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE ] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits_mid_side[1];
bits[FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE ] = encoder->private_->best_subframe_bits [1] + encoder->private_->best_subframe_bits_mid_side[1];
bits[FLAC__CHANNEL_ASSIGNMENT_MID_SIDE ] = encoder->private_->best_subframe_bits_mid_side[0] + encoder->private_->best_subframe_bits_mid_side[1];
channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT;
min_bits = bits[channel_assignment];
for(ca = 1; ca <= 3; ca++) {
if(bits[ca] < min_bits) {
min_bits = bits[ca];
channel_assignment = (FLAC__ChannelAssignment)ca;
}
}
}
frame_header.channel_assignment = channel_assignment;
if(!FLAC__frame_add_header(&frame_header, encoder->private_->frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return false;
}
switch(channel_assignment) {
case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]];
right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]];
break;
case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]];
right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
break;
case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
left_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]];
break;
case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
left_subframe = &encoder->private_->subframe_workspace_mid_side[0][encoder->private_->best_subframe_mid_side[0]];
right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
break;
default:
FLAC__ASSERT(0);
}
switch(channel_assignment) {
case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
left_bps = encoder->private_->subframe_bps [0];
right_bps = encoder->private_->subframe_bps [1];
break;
case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
left_bps = encoder->private_->subframe_bps [0];
right_bps = encoder->private_->subframe_bps_mid_side[1];
break;
case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
left_bps = encoder->private_->subframe_bps_mid_side[1];
right_bps = encoder->private_->subframe_bps [1];
break;
case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
left_bps = encoder->private_->subframe_bps_mid_side[0];
right_bps = encoder->private_->subframe_bps_mid_side[1];
break;
default:
FLAC__ASSERT(0);
}
/* note that encoder_add_subframe_ sets the state for us in case of an error */
if(!add_subframe_(encoder, frame_header.blocksize, left_bps , left_subframe , encoder->private_->frame))
return false;
if(!add_subframe_(encoder, frame_header.blocksize, right_bps, right_subframe, encoder->private_->frame))
return false;
}
else {
if(!FLAC__frame_add_header(&frame_header, encoder->private_->frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return false;
}
for(channel = 0; channel < encoder->protected_->channels; channel++) {
if(!add_subframe_(encoder, frame_header.blocksize, encoder->private_->subframe_bps[channel], &encoder->private_->subframe_workspace[channel][encoder->private_->best_subframe[channel]], encoder->private_->frame)) {
/* the above function sets the state for us in case of an error */
return false;
}
}
}
if(encoder->protected_->loose_mid_side_stereo) {
encoder->private_->loose_mid_side_stereo_frame_count++;
if(encoder->private_->loose_mid_side_stereo_frame_count >= encoder->private_->loose_mid_side_stereo_frames)
encoder->private_->loose_mid_side_stereo_frame_count = 0;
}
encoder->private_->last_channel_assignment = frame_header.channel_assignment;
return true;
}
FLAC__bool process_subframe_(
FLAC__StreamEncoder *encoder,
unsigned min_partition_order,
unsigned max_partition_order,
const FLAC__FrameHeader *frame_header,
unsigned subframe_bps,
const FLAC__int32 integer_signal[],
FLAC__Subframe *subframe[2],
FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2],
FLAC__int32 *residual[2],
unsigned *best_subframe,
unsigned *best_bits
)
{
#ifndef FLAC__INTEGER_ONLY_LIBRARY
FLAC__float fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1];
#else
FLAC__fixedpoint fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1];
#endif
#ifndef FLAC__INTEGER_ONLY_LIBRARY
FLAC__double lpc_residual_bits_per_sample;
FLAC__real autoc[FLAC__MAX_LPC_ORDER+1]; /* WATCHOUT: the size is important even though encoder->protected_->max_lpc_order might be less; some asm routines need all the space */
FLAC__double lpc_error[FLAC__MAX_LPC_ORDER];
unsigned min_lpc_order, max_lpc_order, lpc_order;
unsigned min_qlp_coeff_precision, max_qlp_coeff_precision, qlp_coeff_precision;
#endif
unsigned min_fixed_order, max_fixed_order, guess_fixed_order, fixed_order;
unsigned rice_parameter;
unsigned _candidate_bits, _best_bits;
unsigned _best_subframe;
/* only use RICE2 partitions if stream bps > 16 */
const unsigned rice_parameter_limit = FLAC__stream_encoder_get_bits_per_sample(encoder) > 16? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
FLAC__ASSERT(frame_header->blocksize > 0);
/* verbatim subframe is the baseline against which we measure other compressed subframes */
_best_subframe = 0;
if(encoder->private_->disable_verbatim_subframes && frame_header->blocksize >= FLAC__MAX_FIXED_ORDER)
_best_bits = UINT_MAX;
else
_best_bits = evaluate_verbatim_subframe_(encoder, integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]);
if(frame_header->blocksize >= FLAC__MAX_FIXED_ORDER) {
unsigned signal_is_constant = false;
guess_fixed_order = encoder->private_->local_fixed_compute_best_predictor(integer_signal+FLAC__MAX_FIXED_ORDER, frame_header->blocksize-FLAC__MAX_FIXED_ORDER, fixed_residual_bits_per_sample);
/* check for constant subframe */
if(
!encoder->private_->disable_constant_subframes &&
#ifndef FLAC__INTEGER_ONLY_LIBRARY
fixed_residual_bits_per_sample[1] == 0.0
#else
fixed_residual_bits_per_sample[1] == FLAC__FP_ZERO
#endif
) {
/* the above means it's possible all samples are the same value; now double-check it: */
unsigned i;
signal_is_constant = true;
for(i = 1; i < frame_header->blocksize; i++) {
if(integer_signal[0] != integer_signal[i]) {
signal_is_constant = false;
break;
}
}
}
if(signal_is_constant) {
_candidate_bits = evaluate_constant_subframe_(encoder, integer_signal[0], frame_header->blocksize, subframe_bps, subframe[!_best_subframe]);
if(_candidate_bits < _best_bits) {
_best_subframe = !_best_subframe;
_best_bits = _candidate_bits;
}
}
else {
if(!encoder->private_->disable_fixed_subframes || (encoder->protected_->max_lpc_order == 0 && _best_bits == UINT_MAX)) {
/* encode fixed */
if(encoder->protected_->do_exhaustive_model_search) {
min_fixed_order = 0;
max_fixed_order = FLAC__MAX_FIXED_ORDER;
}
else {
min_fixed_order = max_fixed_order = guess_fixed_order;
}
if(max_fixed_order >= frame_header->blocksize)
max_fixed_order = frame_header->blocksize - 1;
for(fixed_order = min_fixed_order; fixed_order <= max_fixed_order; fixed_order++) {
#ifndef FLAC__INTEGER_ONLY_LIBRARY
if(fixed_residual_bits_per_sample[fixed_order] >= (FLAC__float)subframe_bps)
continue; /* don't even try */
rice_parameter = (fixed_residual_bits_per_sample[fixed_order] > 0.0)? (unsigned)(fixed_residual_bits_per_sample[fixed_order]+0.5) : 0; /* 0.5 is for rounding */
#else
if(FLAC__fixedpoint_trunc(fixed_residual_bits_per_sample[fixed_order]) >= (int)subframe_bps)
continue; /* don't even try */
rice_parameter = (fixed_residual_bits_per_sample[fixed_order] > FLAC__FP_ZERO)? (unsigned)FLAC__fixedpoint_trunc(fixed_residual_bits_per_sample[fixed_order]+FLAC__FP_ONE_HALF) : 0; /* 0.5 is for rounding */
#endif
rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
if(rice_parameter >= rice_parameter_limit) {
#ifdef DEBUG_VERBOSE
fprintf(stderr, "clipping rice_parameter (%u -> %u) @0\n", rice_parameter, rice_parameter_limit - 1);
#endif
rice_parameter = rice_parameter_limit - 1;
}
_candidate_bits =
evaluate_fixed_subframe_(
encoder,
integer_signal,
residual[!_best_subframe],
encoder->private_->abs_residual_partition_sums,
encoder->private_->raw_bits_per_partition,
frame_header->blocksize,
subframe_bps,
fixed_order,
rice_parameter,
rice_parameter_limit,
min_partition_order,
max_partition_order,
encoder->protected_->do_escape_coding,
encoder->protected_->rice_parameter_search_dist,
subframe[!_best_subframe],
partitioned_rice_contents[!_best_subframe]
);
if(_candidate_bits < _best_bits) {
_best_subframe = !_best_subframe;
_best_bits = _candidate_bits;
}
}
}
#ifndef FLAC__INTEGER_ONLY_LIBRARY
/* encode lpc */
if(encoder->protected_->max_lpc_order > 0) {
if(encoder->protected_->max_lpc_order >= frame_header->blocksize)
max_lpc_order = frame_header->blocksize-1;
else
max_lpc_order = encoder->protected_->max_lpc_order;
if(max_lpc_order > 0) {
unsigned a;
for (a = 0; a < encoder->protected_->num_apodizations; a++) {
FLAC__lpc_window_data(integer_signal, encoder->private_->window[a], encoder->private_->windowed_signal, frame_header->blocksize);
encoder->private_->local_lpc_compute_autocorrelation(encoder->private_->windowed_signal, frame_header->blocksize, max_lpc_order+1, autoc);
/* if autoc[0] == 0.0, the signal is constant and we usually won't get here, but it can happen */
if(autoc[0] != 0.0) {
FLAC__lpc_compute_lp_coefficients(autoc, &max_lpc_order, encoder->private_->lp_coeff, lpc_error);
if(encoder->protected_->do_exhaustive_model_search) {
min_lpc_order = 1;
}
else {
const unsigned guess_lpc_order =
FLAC__lpc_compute_best_order(
lpc_error,
max_lpc_order,
frame_header->blocksize,
subframe_bps + (
encoder->protected_->do_qlp_coeff_prec_search?
FLAC__MIN_QLP_COEFF_PRECISION : /* have to guess; use the min possible size to avoid accidentally favoring lower orders */
encoder->protected_->qlp_coeff_precision
)
);
min_lpc_order = max_lpc_order = guess_lpc_order;
}
if(max_lpc_order >= frame_header->blocksize)
max_lpc_order = frame_header->blocksize - 1;
for(lpc_order = min_lpc_order; lpc_order <= max_lpc_order; lpc_order++) {
lpc_residual_bits_per_sample = FLAC__lpc_compute_expected_bits_per_residual_sample(lpc_error[lpc_order-1], frame_header->blocksize-lpc_order);
if(lpc_residual_bits_per_sample >= (FLAC__double)subframe_bps)
continue; /* don't even try */
rice_parameter = (lpc_residual_bits_per_sample > 0.0)? (unsigned)(lpc_residual_bits_per_sample+0.5) : 0; /* 0.5 is for rounding */
rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
if(rice_parameter >= rice_parameter_limit) {
#ifdef DEBUG_VERBOSE
fprintf(stderr, "clipping rice_parameter (%u -> %u) @1\n", rice_parameter, rice_parameter_limit - 1);
#endif
rice_parameter = rice_parameter_limit - 1;
}
if(encoder->protected_->do_qlp_coeff_prec_search) {
min_qlp_coeff_precision = FLAC__MIN_QLP_COEFF_PRECISION;
/* try to ensure a 32-bit datapath throughout for 16bps(+1bps for side channel) or less */
if(subframe_bps <= 17) {
max_qlp_coeff_precision = flac_min(32 - subframe_bps - lpc_order, FLAC__MAX_QLP_COEFF_PRECISION);
max_qlp_coeff_precision = flac_max(max_qlp_coeff_precision, min_qlp_coeff_precision);
}
else
max_qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION;
}
else {
min_qlp_coeff_precision = max_qlp_coeff_precision = encoder->protected_->qlp_coeff_precision;
}
for(qlp_coeff_precision = min_qlp_coeff_precision; qlp_coeff_precision <= max_qlp_coeff_precision; qlp_coeff_precision++) {
_candidate_bits =
evaluate_lpc_subframe_(
encoder,
integer_signal,
residual[!_best_subframe],
encoder->private_->abs_residual_partition_sums,
encoder->private_->raw_bits_per_partition,
encoder->private_->lp_coeff[lpc_order-1],
frame_header->blocksize,
subframe_bps,
lpc_order,
qlp_coeff_precision,
rice_parameter,
rice_parameter_limit,
min_partition_order,
max_partition_order,
encoder->protected_->do_escape_coding,
encoder->protected_->rice_parameter_search_dist,
subframe[!_best_subframe],
partitioned_rice_contents[!_best_subframe]
);
if(_candidate_bits > 0) { /* if == 0, there was a problem quantizing the lpcoeffs */
if(_candidate_bits < _best_bits) {
_best_subframe = !_best_subframe;
_best_bits = _candidate_bits;
}
}
}
}
}
}
}
}
#endif /* !defined FLAC__INTEGER_ONLY_LIBRARY */
}
}
/* under rare circumstances this can happen when all but lpc subframe types are disabled: */
if(_best_bits == UINT_MAX) {
FLAC__ASSERT(_best_subframe == 0);
_best_bits = evaluate_verbatim_subframe_(encoder, integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]);
}
*best_subframe = _best_subframe;
*best_bits = _best_bits;
return true;
}
FLAC__bool add_subframe_(
FLAC__StreamEncoder *encoder,
unsigned blocksize,
unsigned subframe_bps,
const FLAC__Subframe *subframe,
FLAC__BitWriter *frame
)
{
switch(subframe->type) {
case FLAC__SUBFRAME_TYPE_CONSTANT:
if(!FLAC__subframe_add_constant(&(subframe->data.constant), subframe_bps, subframe->wasted_bits, frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return false;
}
break;
case FLAC__SUBFRAME_TYPE_FIXED:
if(!FLAC__subframe_add_fixed(&(subframe->data.fixed), blocksize - subframe->data.fixed.order, subframe_bps, subframe->wasted_bits, frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return false;
}
break;
case FLAC__SUBFRAME_TYPE_LPC:
if(!FLAC__subframe_add_lpc(&(subframe->data.lpc), blocksize - subframe->data.lpc.order, subframe_bps, subframe->wasted_bits, frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return false;
}
break;
case FLAC__SUBFRAME_TYPE_VERBATIM:
if(!FLAC__subframe_add_verbatim(&(subframe->data.verbatim), blocksize, subframe_bps, subframe->wasted_bits, frame)) {
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
return false;
}
break;
default:
FLAC__ASSERT(0);
}
return true;
}
#define SPOTCHECK_ESTIMATE 0
#if SPOTCHECK_ESTIMATE
static void spotcheck_subframe_estimate_(
FLAC__StreamEncoder *encoder,
unsigned blocksize,
unsigned subframe_bps,
const FLAC__Subframe *subframe,
unsigned estimate
)
{
FLAC__bool ret;
FLAC__BitWriter *frame = FLAC__bitwriter_new();
if(frame == 0) {
fprintf(stderr, "EST: can't allocate frame\n");
return;
}
if(!FLAC__bitwriter_init(frame)) {
fprintf(stderr, "EST: can't init frame\n");
return;
}
ret = add_subframe_(encoder, blocksize, subframe_bps, subframe, frame);
FLAC__ASSERT(ret);
{
const unsigned actual = FLAC__bitwriter_get_input_bits_unconsumed(frame);
if(estimate != actual)
fprintf(stderr, "EST: bad, frame#%u sub#%%d type=%8s est=%u, actual=%u, delta=%d\n", encoder->private_->current_frame_number, FLAC__SubframeTypeString[subframe->type], estimate, actual, (int)actual-(int)estimate);
}
FLAC__bitwriter_delete(frame);
}
#endif
unsigned evaluate_constant_subframe_(
FLAC__StreamEncoder *encoder,
const FLAC__int32 signal,
unsigned blocksize,
unsigned subframe_bps,
FLAC__Subframe *subframe
)
{
unsigned estimate;
subframe->type = FLAC__SUBFRAME_TYPE_CONSTANT;
subframe->data.constant.value = signal;
estimate = FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe->wasted_bits + subframe_bps;
#if SPOTCHECK_ESTIMATE
spotcheck_subframe_estimate_(encoder, blocksize, subframe_bps, subframe, estimate);
#else
(void)encoder, (void)blocksize;
#endif
return estimate;
}
unsigned evaluate_fixed_subframe_(
FLAC__StreamEncoder *encoder,
const FLAC__int32 signal[],
FLAC__int32 residual[],
FLAC__uint64 abs_residual_partition_sums[],
unsigned raw_bits_per_partition[],
unsigned blocksize,
unsigned subframe_bps,
unsigned order,
unsigned rice_parameter,
unsigned rice_parameter_limit,
unsigned min_partition_order,
unsigned max_partition_order,
FLAC__bool do_escape_coding,
unsigned rice_parameter_search_dist,
FLAC__Subframe *subframe,
FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
)
{
unsigned i, residual_bits, estimate;
const unsigned residual_samples = blocksize - order;
FLAC__fixed_compute_residual(signal+order, residual_samples, order, residual);
subframe->type = FLAC__SUBFRAME_TYPE_FIXED;
subframe->data.fixed.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE;
subframe->data.fixed.entropy_coding_method.data.partitioned_rice.contents = partitioned_rice_contents;
subframe->data.fixed.residual = residual;
residual_bits =
find_best_partition_order_(
encoder->private_,
residual,
abs_residual_partition_sums,
raw_bits_per_partition,
residual_samples,
order,
rice_parameter,
rice_parameter_limit,
min_partition_order,
max_partition_order,
subframe_bps,
do_escape_coding,
rice_parameter_search_dist,
&subframe->data.fixed.entropy_coding_method
);
subframe->data.fixed.order = order;
for(i = 0; i < order; i++)
subframe->data.fixed.warmup[i] = signal[i];
estimate = FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe->wasted_bits + (order * subframe_bps) + residual_bits;
#if SPOTCHECK_ESTIMATE
spotcheck_subframe_estimate_(encoder, blocksize, subframe_bps, subframe, estimate);
#endif
return estimate;
}
#ifndef FLAC__INTEGER_ONLY_LIBRARY
unsigned evaluate_lpc_subframe_(
FLAC__StreamEncoder *encoder,
const FLAC__int32 signal[],
FLAC__int32 residual[],
FLAC__uint64 abs_residual_partition_sums[],
unsigned raw_bits_per_partition[],
const FLAC__real lp_coeff[],
unsigned blocksize,
unsigned subframe_bps,
unsigned order,
unsigned qlp_coeff_precision,
unsigned rice_parameter,
unsigned rice_parameter_limit,
unsigned min_partition_order,
unsigned max_partition_order,
FLAC__bool do_escape_coding,
unsigned rice_parameter_search_dist,
FLAC__Subframe *subframe,
FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
)
{
FLAC__int32 qlp_coeff[FLAC__MAX_LPC_ORDER];
unsigned i, residual_bits, estimate;
int quantization, ret;
const unsigned residual_samples = blocksize - order;
/* try to keep qlp coeff precision such that only 32-bit math is required for decode of <=16bps streams */
if(subframe_bps <= 16) {
FLAC__ASSERT(order > 0);
FLAC__ASSERT(order <= FLAC__MAX_LPC_ORDER);
qlp_coeff_precision = flac_min(qlp_coeff_precision, 32 - subframe_bps - FLAC__bitmath_ilog2(order));
}
ret = FLAC__lpc_quantize_coefficients(lp_coeff, order, qlp_coeff_precision, qlp_coeff, &quantization);
if(ret != 0)
return 0; /* this is a hack to indicate to the caller that we can't do lp at this order on this subframe */
if(subframe_bps + qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32)
if(subframe_bps <= 16 && qlp_coeff_precision <= 16)
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
else
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
else
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
subframe->type = FLAC__SUBFRAME_TYPE_LPC;
subframe->data.lpc.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE;
subframe->data.lpc.entropy_coding_method.data.partitioned_rice.contents = partitioned_rice_contents;
subframe->data.lpc.residual = residual;
residual_bits =
find_best_partition_order_(
encoder->private_,
residual,
abs_residual_partition_sums,
raw_bits_per_partition,
residual_samples,
order,
rice_parameter,
rice_parameter_limit,
min_partition_order,
max_partition_order,
subframe_bps,
do_escape_coding,
rice_parameter_search_dist,
&subframe->data.lpc.entropy_coding_method
);
subframe->data.lpc.order = order;
subframe->data.lpc.qlp_coeff_precision = qlp_coeff_precision;
subframe->data.lpc.quantization_level = quantization;
memcpy(subframe->data.lpc.qlp_coeff, qlp_coeff, sizeof(FLAC__int32)*FLAC__MAX_LPC_ORDER);
for(i = 0; i < order; i++)
subframe->data.lpc.warmup[i] = signal[i];
estimate = FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe->wasted_bits + FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN + FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN + (order * (qlp_coeff_precision + subframe_bps)) + residual_bits;
#if SPOTCHECK_ESTIMATE
spotcheck_subframe_estimate_(encoder, blocksize, subframe_bps, subframe, estimate);
#endif
return estimate;
}
#endif
unsigned evaluate_verbatim_subframe_(
FLAC__StreamEncoder *encoder,
const FLAC__int32 signal[],
unsigned blocksize,
unsigned subframe_bps,
FLAC__Subframe *subframe
)
{
unsigned estimate;
subframe->type = FLAC__SUBFRAME_TYPE_VERBATIM;
subframe->data.verbatim.data = signal;
estimate = FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe->wasted_bits + (blocksize * subframe_bps);
#if SPOTCHECK_ESTIMATE
spotcheck_subframe_estimate_(encoder, blocksize, subframe_bps, subframe, estimate);
#else
(void)encoder;
#endif
return estimate;
}
unsigned find_best_partition_order_(
FLAC__StreamEncoderPrivate *private_,
const FLAC__int32 residual[],
FLAC__uint64 abs_residual_partition_sums[],
unsigned raw_bits_per_partition[],
unsigned residual_samples,
unsigned predictor_order,
unsigned rice_parameter,
unsigned rice_parameter_limit,
unsigned min_partition_order,
unsigned max_partition_order,
unsigned bps,
FLAC__bool do_escape_coding,
unsigned rice_parameter_search_dist,
FLAC__EntropyCodingMethod *best_ecm
)
{
unsigned residual_bits, best_residual_bits = 0;
unsigned best_parameters_index = 0;
unsigned best_partition_order = 0;
const unsigned blocksize = residual_samples + predictor_order;
max_partition_order = FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order(max_partition_order, blocksize, predictor_order);
min_partition_order = flac_min(min_partition_order, max_partition_order);
precompute_partition_info_sums_(residual, abs_residual_partition_sums, residual_samples, predictor_order, min_partition_order, max_partition_order, bps);
if(do_escape_coding)
precompute_partition_info_escapes_(residual, raw_bits_per_partition, residual_samples, predictor_order, min_partition_order, max_partition_order);
{
int partition_order;
unsigned sum;
for(partition_order = (int)max_partition_order, sum = 0; partition_order >= (int)min_partition_order; partition_order--) {
if(!
set_partitioned_rice_(
#ifdef EXACT_RICE_BITS_CALCULATION
residual,
#endif
abs_residual_partition_sums+sum,
raw_bits_per_partition+sum,
residual_samples,
predictor_order,
rice_parameter,
rice_parameter_limit,
rice_parameter_search_dist,
(unsigned)partition_order,
do_escape_coding,
&private_->partitioned_rice_contents_extra[!best_parameters_index],
&residual_bits
)
)
{
FLAC__ASSERT(best_residual_bits != 0);
break;
}
sum += 1u << partition_order;
if(best_residual_bits == 0 || residual_bits < best_residual_bits) {
best_residual_bits = residual_bits;
best_parameters_index = !best_parameters_index;
best_partition_order = partition_order;
}
}
}
best_ecm->data.partitioned_rice.order = best_partition_order;
{
/*
* We are allowed to de-const the pointer based on our special
* knowledge; it is const to the outside world.
*/
FLAC__EntropyCodingMethod_PartitionedRiceContents* prc = (FLAC__EntropyCodingMethod_PartitionedRiceContents*)best_ecm->data.partitioned_rice.contents;
unsigned partition;
/* save best parameters and raw_bits */
FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(prc, flac_max(6u, best_partition_order));
memcpy(prc->parameters, private_->partitioned_rice_contents_extra[best_parameters_index].parameters, sizeof(unsigned)*(1<<(best_partition_order)));
if(do_escape_coding)
memcpy(prc->raw_bits, private_->partitioned_rice_contents_extra[best_parameters_index].raw_bits, sizeof(unsigned)*(1<<(best_partition_order)));
/*
* Now need to check if the type should be changed to
* FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2 based on the
* size of the rice parameters.
*/
for(partition = 0; partition < (1u<<best_partition_order); partition++) {
if(prc->parameters[partition] >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
best_ecm->type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2;
break;
}
}
}
return best_residual_bits;
}
#if defined(FLAC__CPU_IA32) && !defined FLAC__NO_ASM && defined FLAC__HAS_NASM
extern void precompute_partition_info_sums_32bit_asm_ia32_(
const FLAC__int32 residual[],
FLAC__uint64 abs_residual_partition_sums[],
unsigned blocksize,
unsigned predictor_order,
unsigned min_partition_order,
unsigned max_partition_order
);
#endif
void precompute_partition_info_sums_(
const FLAC__int32 residual[],
FLAC__uint64 abs_residual_partition_sums[],
unsigned residual_samples,
unsigned predictor_order,
unsigned min_partition_order,
unsigned max_partition_order,
unsigned bps
)
{
const unsigned default_partition_samples = (residual_samples + predictor_order) >> max_partition_order;
unsigned partitions = 1u << max_partition_order;
FLAC__ASSERT(default_partition_samples > predictor_order);
#if defined(FLAC__CPU_IA32) && !defined FLAC__NO_ASM && defined FLAC__HAS_NASM
/* slightly pessimistic but still catches all common cases */
/* WATCHOUT: "+ bps" is an assumption that the average residual magnitude will not be more than "bps" bits */
if(FLAC__bitmath_ilog2(default_partition_samples) + bps < 32) {
precompute_partition_info_sums_32bit_asm_ia32_(residual, abs_residual_partition_sums, residual_samples + predictor_order, predictor_order, min_partition_order, max_partition_order);
return;
}
#endif
/* first do max_partition_order */
{
unsigned partition, residual_sample, end = (unsigned)(-(int)predictor_order);
/* slightly pessimistic but still catches all common cases */
/* WATCHOUT: "+ bps" is an assumption that the average residual magnitude will not be more than "bps" bits */
if(FLAC__bitmath_ilog2(default_partition_samples) + bps < 32) {
FLAC__uint32 abs_residual_partition_sum;
for(partition = residual_sample = 0; partition < partitions; partition++) {
end += default_partition_samples;
abs_residual_partition_sum = 0;
for( ; residual_sample < end; residual_sample++)
abs_residual_partition_sum += abs(residual[residual_sample]); /* abs(INT_MIN) is undefined, but if the residual is INT_MIN we have bigger problems */
abs_residual_partition_sums[partition] = abs_residual_partition_sum;
}
}
else { /* have to pessimistically use 64 bits for accumulator */
FLAC__uint64 abs_residual_partition_sum;
for(partition = residual_sample = 0; partition < partitions; partition++) {
end += default_partition_samples;
abs_residual_partition_sum = 0;
for( ; residual_sample < end; residual_sample++)
abs_residual_partition_sum += abs(residual[residual_sample]); /* abs(INT_MIN) is undefined, but if the residual is INT_MIN we have bigger problems */
abs_residual_partition_sums[partition] = abs_residual_partition_sum;
}
}
}
/* now merge partitions for lower orders */
{
unsigned from_partition = 0, to_partition = partitions;
int partition_order;
for(partition_order = (int)max_partition_order - 1; partition_order >= (int)min_partition_order; partition_order--) {
unsigned i;
partitions >>= 1;
for(i = 0; i < partitions; i++) {
abs_residual_partition_sums[to_partition++] =
abs_residual_partition_sums[from_partition ] +
abs_residual_partition_sums[from_partition+1];
from_partition += 2;
}
}
}
}
void precompute_partition_info_escapes_(
const FLAC__int32 residual[],
unsigned raw_bits_per_partition[],
unsigned residual_samples,
unsigned predictor_order,
unsigned min_partition_order,
unsigned max_partition_order
)
{
int partition_order;
unsigned from_partition, to_partition = 0;
const unsigned blocksize = residual_samples + predictor_order;
/* first do max_partition_order */
for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) {
FLAC__int32 r;
FLAC__uint32 rmax;
unsigned partition, partition_sample, partition_samples, residual_sample;
const unsigned partitions = 1u << partition_order;
const unsigned default_partition_samples = blocksize >> partition_order;
FLAC__ASSERT(default_partition_samples > predictor_order);
for(partition = residual_sample = 0; partition < partitions; partition++) {
partition_samples = default_partition_samples;
if(partition == 0)
partition_samples -= predictor_order;
rmax = 0;
for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) {
r = residual[residual_sample++];
/* OPT: maybe faster: rmax |= r ^ (r>>31) */
if(r < 0)
rmax |= ~r;
else
rmax |= r;
}
/* now we know all residual values are in the range [-rmax-1,rmax] */
raw_bits_per_partition[partition] = rmax? FLAC__bitmath_ilog2(rmax) + 2 : 1;
}
to_partition = partitions;
break; /*@@@ yuck, should remove the 'for' loop instead */
}
/* now merge partitions for lower orders */
for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) {
unsigned m;
unsigned i;
const unsigned partitions = 1u << partition_order;
for(i = 0; i < partitions; i++) {
m = raw_bits_per_partition[from_partition];
from_partition++;
raw_bits_per_partition[to_partition] = flac_max(m, raw_bits_per_partition[from_partition]);
from_partition++;
to_partition++;
}
}
}
#ifdef EXACT_RICE_BITS_CALCULATION
static inline unsigned count_rice_bits_in_partition_(
const unsigned rice_parameter,
const unsigned partition_samples,
const FLAC__int32 *residual
)
{
unsigned i, partition_bits =
FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + /* actually could end up being FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN but err on side of 16bps */
(1+rice_parameter) * partition_samples /* 1 for unary stop bit + rice_parameter for the binary portion */
;
for(i = 0; i < partition_samples; i++)
partition_bits += ( (FLAC__uint32)((residual[i]<<1)^(residual[i]>>31)) >> rice_parameter );
return partition_bits;
}
#else
static inline unsigned count_rice_bits_in_partition_(
const unsigned rice_parameter,
const unsigned partition_samples,
const FLAC__uint64 abs_residual_partition_sum
)
{
return
FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + /* actually could end up being FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN but err on side of 16bps */
(1+rice_parameter) * partition_samples + /* 1 for unary stop bit + rice_parameter for the binary portion */
(
rice_parameter?
(unsigned)(abs_residual_partition_sum >> (rice_parameter-1)) /* rice_parameter-1 because the real coder sign-folds instead of using a sign bit */
: (unsigned)(abs_residual_partition_sum << 1) /* can't shift by negative number, so reverse */
)
- (partition_samples >> 1)
/* -(partition_samples>>1) to subtract out extra contributions to the abs_residual_partition_sum.
* The actual number of bits used is closer to the sum(for all i in the partition) of abs(residual[i])>>(rice_parameter-1)
* By using the abs_residual_partition sum, we also add in bits in the LSBs that would normally be shifted out.
* So the subtraction term tries to guess how many extra bits were contributed.
* If the LSBs are randomly distributed, this should average to 0.5 extra bits per sample.
*/
;
}
#endif
FLAC__bool set_partitioned_rice_(
#ifdef EXACT_RICE_BITS_CALCULATION
const FLAC__int32 residual[],
#endif
const FLAC__uint64 abs_residual_partition_sums[],
const unsigned raw_bits_per_partition[],
const unsigned residual_samples,
const unsigned predictor_order,
const unsigned suggested_rice_parameter,
const unsigned rice_parameter_limit,
const unsigned rice_parameter_search_dist,
const unsigned partition_order,
const FLAC__bool search_for_escapes,
FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
unsigned *bits
)
{
unsigned rice_parameter, partition_bits;
unsigned best_partition_bits, best_rice_parameter = 0;
unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN;
unsigned *parameters, *raw_bits;
#ifdef ENABLE_RICE_PARAMETER_SEARCH
unsigned min_rice_parameter, max_rice_parameter;
#else
(void)rice_parameter_search_dist;
#endif
FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER);
FLAC__ASSERT(rice_parameter_limit <= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER);
FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, flac_max(6u, partition_order));
parameters = partitioned_rice_contents->parameters;
raw_bits = partitioned_rice_contents->raw_bits;
if(partition_order == 0) {
best_partition_bits = (unsigned)(-1);
#ifdef ENABLE_RICE_PARAMETER_SEARCH
if(rice_parameter_search_dist) {
if(suggested_rice_parameter < rice_parameter_search_dist)
min_rice_parameter = 0;
else
min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist;
max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist;
if(max_rice_parameter >= rice_parameter_limit) {
#ifdef DEBUG_VERBOSE
fprintf(stderr, "clipping rice_parameter (%u -> %u) @5\n", max_rice_parameter, rice_parameter_limit - 1);
#endif
max_rice_parameter = rice_parameter_limit - 1;
}
}
else
min_rice_parameter = max_rice_parameter = suggested_rice_parameter;
for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
#else
rice_parameter = suggested_rice_parameter;
#endif
#ifdef EXACT_RICE_BITS_CALCULATION
partition_bits = count_rice_bits_in_partition_(rice_parameter, residual_samples, residual);
#else
partition_bits = count_rice_bits_in_partition_(rice_parameter, residual_samples, abs_residual_partition_sums[0]);
#endif
if(partition_bits < best_partition_bits) {
best_rice_parameter = rice_parameter;
best_partition_bits = partition_bits;
}
#ifdef ENABLE_RICE_PARAMETER_SEARCH
}
#endif
if(search_for_escapes) {
partition_bits = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN + raw_bits_per_partition[0] * residual_samples;
if(partition_bits <= best_partition_bits) {
raw_bits[0] = raw_bits_per_partition[0];
best_rice_parameter = 0; /* will be converted to appropriate escape parameter later */
best_partition_bits = partition_bits;
}
else
raw_bits[0] = 0;
}
parameters[0] = best_rice_parameter;
bits_ += best_partition_bits;
}
else {
unsigned partition, residual_sample;
unsigned partition_samples;
FLAC__uint64 mean, k;
const unsigned partitions = 1u << partition_order;
for(partition = residual_sample = 0; partition < partitions; partition++) {
partition_samples = (residual_samples+predictor_order) >> partition_order;
if(partition == 0) {
if(partition_samples <= predictor_order)
return false;
else
partition_samples -= predictor_order;
}
mean = abs_residual_partition_sums[partition];
/* we are basically calculating the size in bits of the
* average residual magnitude in the partition:
* rice_parameter = floor(log2(mean/partition_samples))
* 'mean' is not a good name for the variable, it is
* actually the sum of magnitudes of all residual values
* in the partition, so the actual mean is
* mean/partition_samples
*/
for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1)
;
if(rice_parameter >= rice_parameter_limit) {
#ifdef DEBUG_VERBOSE
fprintf(stderr, "clipping rice_parameter (%u -> %u) @6\n", rice_parameter, rice_parameter_limit - 1);
#endif
rice_parameter = rice_parameter_limit - 1;
}
best_partition_bits = (unsigned)(-1);
#ifdef ENABLE_RICE_PARAMETER_SEARCH
if(rice_parameter_search_dist) {
if(rice_parameter < rice_parameter_search_dist)
min_rice_parameter = 0;
else
min_rice_parameter = rice_parameter - rice_parameter_search_dist;
max_rice_parameter = rice_parameter + rice_parameter_search_dist;
if(max_rice_parameter >= rice_parameter_limit) {
#ifdef DEBUG_VERBOSE
fprintf(stderr, "clipping rice_parameter (%u -> %u) @7\n", max_rice_parameter, rice_parameter_limit - 1);
#endif
max_rice_parameter = rice_parameter_limit - 1;
}
}
else
min_rice_parameter = max_rice_parameter = rice_parameter;
for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
#endif
#ifdef EXACT_RICE_BITS_CALCULATION
partition_bits = count_rice_bits_in_partition_(rice_parameter, partition_samples, residual+residual_sample);
#else
partition_bits = count_rice_bits_in_partition_(rice_parameter, partition_samples, abs_residual_partition_sums[partition]);
#endif
if(partition_bits < best_partition_bits) {
best_rice_parameter = rice_parameter;
best_partition_bits = partition_bits;
}
#ifdef ENABLE_RICE_PARAMETER_SEARCH
}
#endif
if(search_for_escapes) {
partition_bits = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN + raw_bits_per_partition[partition] * partition_samples;
if(partition_bits <= best_partition_bits) {
raw_bits[partition] = raw_bits_per_partition[partition];
best_rice_parameter = 0; /* will be converted to appropriate escape parameter later */
best_partition_bits = partition_bits;
}
else
raw_bits[partition] = 0;
}
parameters[partition] = best_rice_parameter;
bits_ += best_partition_bits;
residual_sample += partition_samples;
}
}
*bits = bits_;
return true;
}
unsigned get_wasted_bits_(FLAC__int32 signal[], unsigned samples)
{
unsigned i, shift;
FLAC__int32 x = 0;
for(i = 0; i < samples && !(x&1); i++)
x |= signal[i];
if(x == 0) {
shift = 0;
}
else {
for(shift = 0; !(x&1); shift++)
x >>= 1;
}
if(shift > 0) {
for(i = 0; i < samples; i++)
signal[i] >>= shift;
}
return shift;
}
void append_to_verify_fifo_(verify_input_fifo *fifo, const FLAC__int32 * const input[], unsigned input_offset, unsigned channels, unsigned wide_samples)
{
unsigned channel;
for(channel = 0; channel < channels; channel++)
memcpy(&fifo->data[channel][fifo->tail], &input[channel][input_offset], sizeof(FLAC__int32) * wide_samples);
fifo->tail += wide_samples;
FLAC__ASSERT(fifo->tail <= fifo->size);
}
void append_to_verify_fifo_interleaved_(verify_input_fifo *fifo, const FLAC__int32 input[], unsigned input_offset, unsigned channels, unsigned wide_samples)
{
unsigned channel;
unsigned sample, wide_sample;
unsigned tail = fifo->tail;
sample = input_offset * channels;
for(wide_sample = 0; wide_sample < wide_samples; wide_sample++) {
for(channel = 0; channel < channels; channel++)
fifo->data[channel][tail] = input[sample++];
tail++;
}
fifo->tail = tail;
FLAC__ASSERT(fifo->tail <= fifo->size);
}
FLAC__StreamDecoderReadStatus verify_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
{
FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder*)client_data;
const size_t encoded_bytes = encoder->private_->verify.output.bytes;
(void)decoder;
if(encoder->private_->verify.needs_magic_hack) {
FLAC__ASSERT(*bytes >= FLAC__STREAM_SYNC_LENGTH);
*bytes = FLAC__STREAM_SYNC_LENGTH;
memcpy(buffer, FLAC__STREAM_SYNC_STRING, *bytes);
encoder->private_->verify.needs_magic_hack = false;
}
else {
if(encoded_bytes == 0) {
/*
* If we get here, a FIFO underflow has occurred,
* which means there is a bug somewhere.
*/
FLAC__ASSERT(0);
return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
}
else if(encoded_bytes < *bytes)
*bytes = encoded_bytes;
memcpy(buffer, encoder->private_->verify.output.data, *bytes);
encoder->private_->verify.output.data += *bytes;
encoder->private_->verify.output.bytes -= *bytes;
}
return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
}
FLAC__StreamDecoderWriteStatus verify_write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
{
FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder *)client_data;
unsigned channel;
const unsigned channels = frame->header.channels;
const unsigned blocksize = frame->header.blocksize;
const unsigned bytes_per_block = sizeof(FLAC__int32) * blocksize;
(void)decoder;
for(channel = 0; channel < channels; channel++) {
if(0 != memcmp(buffer[channel], encoder->private_->verify.input_fifo.data[channel], bytes_per_block)) {
unsigned i, sample = 0;
FLAC__int32 expect = 0, got = 0;
for(i = 0; i < blocksize; i++) {
if(buffer[channel][i] != encoder->private_->verify.input_fifo.data[channel][i]) {
sample = i;
expect = (FLAC__int32)encoder->private_->verify.input_fifo.data[channel][i];
got = (FLAC__int32)buffer[channel][i];
break;
}
}
FLAC__ASSERT(i < blocksize);
FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
encoder->private_->verify.error_stats.absolute_sample = frame->header.number.sample_number + sample;
encoder->private_->verify.error_stats.frame_number = (unsigned)(frame->header.number.sample_number / blocksize);
encoder->private_->verify.error_stats.channel = channel;
encoder->private_->verify.error_stats.sample = sample;
encoder->private_->verify.error_stats.expected = expect;
encoder->private_->verify.error_stats.got = got;
encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA;
return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
}
}
/* dequeue the frame from the fifo */
encoder->private_->verify.input_fifo.tail -= blocksize;
FLAC__ASSERT(encoder->private_->verify.input_fifo.tail <= OVERREAD_);
for(channel = 0; channel < channels; channel++)
memmove(&encoder->private_->verify.input_fifo.data[channel][0], &encoder->private_->verify.input_fifo.data[channel][blocksize], encoder->private_->verify.input_fifo.tail * sizeof(encoder->private_->verify.input_fifo.data[0][0]));
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}
void verify_metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
{
(void)decoder, (void)metadata, (void)client_data;
}
void verify_error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
{
FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder*)client_data;
(void)decoder, (void)status;
encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
}
FLAC__StreamEncoderReadStatus file_read_callback_(const FLAC__StreamEncoder *encoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
{
(void)client_data;
*bytes = fread(buffer, 1, *bytes, encoder->private_->file);
if (*bytes == 0) {
if (feof(encoder->private_->file))
return FLAC__STREAM_ENCODER_READ_STATUS_END_OF_STREAM;
else if (ferror(encoder->private_->file))
return FLAC__STREAM_ENCODER_READ_STATUS_ABORT;
}
return FLAC__STREAM_ENCODER_READ_STATUS_CONTINUE;
}
FLAC__StreamEncoderSeekStatus file_seek_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data)
{
(void)client_data;
if(fseeko(encoder->private_->file, (FLAC__off_t)absolute_byte_offset, SEEK_SET) < 0)
return FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR;
else
return FLAC__STREAM_ENCODER_SEEK_STATUS_OK;
}
FLAC__StreamEncoderTellStatus file_tell_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
{
FLAC__off_t offset;
(void)client_data;
offset = ftello(encoder->private_->file);
if(offset < 0) {
return FLAC__STREAM_ENCODER_TELL_STATUS_ERROR;
}
else {
*absolute_byte_offset = (FLAC__uint64)offset;
return FLAC__STREAM_ENCODER_TELL_STATUS_OK;
}
}
#ifdef FLAC__VALGRIND_TESTING
static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
{
size_t ret = fwrite(ptr, size, nmemb, stream);
if(!ferror(stream))
fflush(stream);
return ret;
}
#else
#define local__fwrite fwrite
#endif
FLAC__StreamEncoderWriteStatus file_write_callback_(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data)
{
(void)client_data, (void)current_frame;
if(local__fwrite(buffer, sizeof(FLAC__byte), bytes, encoder->private_->file) == bytes) {
FLAC__bool call_it = 0 != encoder->private_->progress_callback && (
#if FLAC__HAS_OGG
/* We would like to be able to use 'samples > 0' in the
* clause here but currently because of the nature of our
* Ogg writing implementation, 'samples' is always 0 (see
* ogg_encoder_aspect.c). The downside is extra progress
* callbacks.
*/
encoder->private_->is_ogg? true :
#endif
samples > 0
);
if(call_it) {
/* NOTE: We have to add +bytes, +samples, and +1 to the stats
* because at this point in the callback chain, the stats
* have not been updated. Only after we return and control
* gets back to write_frame_() are the stats updated
*/
encoder->private_->progress_callback(encoder, encoder->private_->bytes_written+bytes, encoder->private_->samples_written+samples, encoder->private_->frames_written+(samples?1:0), encoder->private_->total_frames_estimate, encoder->private_->client_data);
}
return FLAC__STREAM_ENCODER_WRITE_STATUS_OK;
}
else
return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
}
/*
* This will forcibly set stdout to binary mode (for OSes that require it)
*/
FILE *get_binary_stdout_(void)
{
/* if something breaks here it is probably due to the presence or
* absence of an underscore before the identifiers 'setmode',
* 'fileno', and/or 'O_BINARY'; check your system header files.
*/
#if defined _MSC_VER || defined __MINGW32__
_setmode(_fileno(stdout), _O_BINARY);
#elif defined __CYGWIN__
/* almost certainly not needed for any modern Cygwin, but let's be safe... */
setmode(_fileno(stdout), _O_BINARY);
#elif defined __EMX__
setmode(fileno(stdout), O_BINARY);
#endif
return stdout;
}
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