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https://github.com/cookiengineer/audacity
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262 lines
15 KiB
C++
262 lines
15 KiB
C++
/* libFLAC++ - Free Lossless Audio Codec library
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* Copyright (C) 2002-2009 Josh Coalson
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* Copyright (C) 2011-2013 Xiph.Org Foundation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of the Xiph.org Foundation nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef FLACPP__ENCODER_H
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#define FLACPP__ENCODER_H
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#include "export.h"
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#include "FLAC/stream_encoder.h"
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#include "decoder.h"
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#include "metadata.h"
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/** \file include/FLAC++/encoder.h
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*
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* \brief
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* This module contains the classes which implement the various
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* encoders.
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*
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* See the detailed documentation in the
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* \link flacpp_encoder encoder \endlink module.
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*/
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/** \defgroup flacpp_encoder FLAC++/encoder.h: encoder classes
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* \ingroup flacpp
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*
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* \brief
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* This module describes the encoder layers provided by libFLAC++.
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*
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* The libFLAC++ encoder classes are object wrappers around their
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* counterparts in libFLAC. All encoding layers available in
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* libFLAC are also provided here. The interface is very similar;
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* make sure to read the \link flac_encoder libFLAC encoder module \endlink.
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*
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* There are only two significant differences here. First, instead of
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* passing in C function pointers for callbacks, you inherit from the
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* encoder class and provide implementations for the callbacks in your
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* derived class; because of this there is no need for a 'client_data'
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* property.
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*
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* Second, there are two stream encoder classes. FLAC::Encoder::Stream
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* is used for the same cases that FLAC__stream_encoder_init_stream() /
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* FLAC__stream_encoder_init_ogg_stream() are used, and FLAC::Encoder::File
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* is used for the same cases that
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* FLAC__stream_encoder_init_FILE() and FLAC__stream_encoder_init_file() /
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* FLAC__stream_encoder_init_ogg_FILE() and FLAC__stream_encoder_init_ogg_file()
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* are used.
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*/
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namespace FLAC {
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namespace Encoder {
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/** \ingroup flacpp_encoder
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* \brief
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* This class wraps the ::FLAC__StreamEncoder. If you are
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* encoding to a file, FLAC::Encoder::File may be more
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* convenient.
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*
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* The usage of this class is similar to FLAC__StreamEncoder,
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* except instead of providing callbacks to
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* FLAC__stream_encoder_init*_stream(), you will inherit from this
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* class and override the virtual callback functions with your
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* own implementations, then call init() or init_ogg(). The rest of
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* the calls work the same as in the C layer.
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*
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* Only the write callback is mandatory. The others are
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* optional; this class provides default implementations that do
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* nothing. In order for some STREAMINFO and SEEKTABLE data to
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* be written properly, you must overide seek_callback() and
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* tell_callback(); see FLAC__stream_encoder_init_stream() as to
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* why.
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*/
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class FLACPP_API Stream {
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public:
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/** This class is a wrapper around FLAC__StreamEncoderState.
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*/
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class FLACPP_API State {
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public:
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inline State(::FLAC__StreamEncoderState state): state_(state) { }
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inline operator ::FLAC__StreamEncoderState() const { return state_; }
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inline const char *as_cstring() const { return ::FLAC__StreamEncoderStateString[state_]; }
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inline const char *resolved_as_cstring(const Stream &encoder) const { return ::FLAC__stream_encoder_get_resolved_state_string(encoder.encoder_); }
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protected:
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::FLAC__StreamEncoderState state_;
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};
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Stream();
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virtual ~Stream();
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//@{
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/** Call after construction to check the that the object was created
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* successfully. If not, use get_state() to find out why not.
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*
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*/
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virtual bool is_valid() const;
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inline operator bool() const { return is_valid(); } ///< See is_valid()
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//@}
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virtual bool set_ogg_serial_number(long value); ///< See FLAC__stream_encoder_set_ogg_serial_number()
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virtual bool set_verify(bool value); ///< See FLAC__stream_encoder_set_verify()
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virtual bool set_streamable_subset(bool value); ///< See FLAC__stream_encoder_set_streamable_subset()
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virtual bool set_channels(unsigned value); ///< See FLAC__stream_encoder_set_channels()
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virtual bool set_bits_per_sample(unsigned value); ///< See FLAC__stream_encoder_set_bits_per_sample()
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virtual bool set_sample_rate(unsigned value); ///< See FLAC__stream_encoder_set_sample_rate()
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virtual bool set_compression_level(unsigned value); ///< See FLAC__stream_encoder_set_compression_level()
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virtual bool set_blocksize(unsigned value); ///< See FLAC__stream_encoder_set_blocksize()
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virtual bool set_do_mid_side_stereo(bool value); ///< See FLAC__stream_encoder_set_do_mid_side_stereo()
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virtual bool set_loose_mid_side_stereo(bool value); ///< See FLAC__stream_encoder_set_loose_mid_side_stereo()
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virtual bool set_apodization(const char *specification); ///< See FLAC__stream_encoder_set_apodization()
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virtual bool set_max_lpc_order(unsigned value); ///< See FLAC__stream_encoder_set_max_lpc_order()
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virtual bool set_qlp_coeff_precision(unsigned value); ///< See FLAC__stream_encoder_set_qlp_coeff_precision()
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virtual bool set_do_qlp_coeff_prec_search(bool value); ///< See FLAC__stream_encoder_set_do_qlp_coeff_prec_search()
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virtual bool set_do_escape_coding(bool value); ///< See FLAC__stream_encoder_set_do_escape_coding()
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virtual bool set_do_exhaustive_model_search(bool value); ///< See FLAC__stream_encoder_set_do_exhaustive_model_search()
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virtual bool set_min_residual_partition_order(unsigned value); ///< See FLAC__stream_encoder_set_min_residual_partition_order()
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virtual bool set_max_residual_partition_order(unsigned value); ///< See FLAC__stream_encoder_set_max_residual_partition_order()
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virtual bool set_rice_parameter_search_dist(unsigned value); ///< See FLAC__stream_encoder_set_rice_parameter_search_dist()
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virtual bool set_total_samples_estimate(FLAC__uint64 value); ///< See FLAC__stream_encoder_set_total_samples_estimate()
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virtual bool set_metadata(::FLAC__StreamMetadata **metadata, unsigned num_blocks); ///< See FLAC__stream_encoder_set_metadata()
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virtual bool set_metadata(FLAC::Metadata::Prototype **metadata, unsigned num_blocks); ///< See FLAC__stream_encoder_set_metadata()
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/* get_state() is not virtual since we want subclasses to be able to return their own state */
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State get_state() const; ///< See FLAC__stream_encoder_get_state()
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virtual Decoder::Stream::State get_verify_decoder_state() const; ///< See FLAC__stream_encoder_get_verify_decoder_state()
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virtual void get_verify_decoder_error_stats(FLAC__uint64 *absolute_sample, unsigned *frame_number, unsigned *channel, unsigned *sample, FLAC__int32 *expected, FLAC__int32 *got); ///< See FLAC__stream_encoder_get_verify_decoder_error_stats()
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virtual bool get_verify() const; ///< See FLAC__stream_encoder_get_verify()
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virtual bool get_streamable_subset() const; ///< See FLAC__stream_encoder_get_streamable_subset()
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virtual bool get_do_mid_side_stereo() const; ///< See FLAC__stream_encoder_get_do_mid_side_stereo()
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virtual bool get_loose_mid_side_stereo() const; ///< See FLAC__stream_encoder_get_loose_mid_side_stereo()
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virtual unsigned get_channels() const; ///< See FLAC__stream_encoder_get_channels()
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virtual unsigned get_bits_per_sample() const; ///< See FLAC__stream_encoder_get_bits_per_sample()
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virtual unsigned get_sample_rate() const; ///< See FLAC__stream_encoder_get_sample_rate()
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virtual unsigned get_blocksize() const; ///< See FLAC__stream_encoder_get_blocksize()
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virtual unsigned get_max_lpc_order() const; ///< See FLAC__stream_encoder_get_max_lpc_order()
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virtual unsigned get_qlp_coeff_precision() const; ///< See FLAC__stream_encoder_get_qlp_coeff_precision()
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virtual bool get_do_qlp_coeff_prec_search() const; ///< See FLAC__stream_encoder_get_do_qlp_coeff_prec_search()
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virtual bool get_do_escape_coding() const; ///< See FLAC__stream_encoder_get_do_escape_coding()
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virtual bool get_do_exhaustive_model_search() const; ///< See FLAC__stream_encoder_get_do_exhaustive_model_search()
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virtual unsigned get_min_residual_partition_order() const; ///< See FLAC__stream_encoder_get_min_residual_partition_order()
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virtual unsigned get_max_residual_partition_order() const; ///< See FLAC__stream_encoder_get_max_residual_partition_order()
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virtual unsigned get_rice_parameter_search_dist() const; ///< See FLAC__stream_encoder_get_rice_parameter_search_dist()
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virtual FLAC__uint64 get_total_samples_estimate() const; ///< See FLAC__stream_encoder_get_total_samples_estimate()
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virtual ::FLAC__StreamEncoderInitStatus init(); ///< See FLAC__stream_encoder_init_stream()
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virtual ::FLAC__StreamEncoderInitStatus init_ogg(); ///< See FLAC__stream_encoder_init_ogg_stream()
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virtual bool finish(); ///< See FLAC__stream_encoder_finish()
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virtual bool process(const FLAC__int32 * const buffer[], unsigned samples); ///< See FLAC__stream_encoder_process()
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virtual bool process_interleaved(const FLAC__int32 buffer[], unsigned samples); ///< See FLAC__stream_encoder_process_interleaved()
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protected:
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/// See FLAC__StreamEncoderReadCallback
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virtual ::FLAC__StreamEncoderReadStatus read_callback(FLAC__byte buffer[], size_t *bytes);
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/// See FLAC__StreamEncoderWriteCallback
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virtual ::FLAC__StreamEncoderWriteStatus write_callback(const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame) = 0;
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/// See FLAC__StreamEncoderSeekCallback
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virtual ::FLAC__StreamEncoderSeekStatus seek_callback(FLAC__uint64 absolute_byte_offset);
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/// See FLAC__StreamEncoderTellCallback
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virtual ::FLAC__StreamEncoderTellStatus tell_callback(FLAC__uint64 *absolute_byte_offset);
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/// See FLAC__StreamEncoderMetadataCallback
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virtual void metadata_callback(const ::FLAC__StreamMetadata *metadata);
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#if (defined _MSC_VER) || (defined __BORLANDC__) || (defined __GNUG__ && (__GNUG__ < 2 || (__GNUG__ == 2 && __GNUC_MINOR__ < 96))) || (defined __SUNPRO_CC)
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// lame hack: some MSVC/GCC versions can't see a protected encoder_ from nested State::resolved_as_cstring()
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friend State;
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#endif
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::FLAC__StreamEncoder *encoder_;
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static ::FLAC__StreamEncoderReadStatus read_callback_(const ::FLAC__StreamEncoder *encoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
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static ::FLAC__StreamEncoderWriteStatus write_callback_(const ::FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data);
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static ::FLAC__StreamEncoderSeekStatus seek_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data);
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static ::FLAC__StreamEncoderTellStatus tell_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
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static void metadata_callback_(const ::FLAC__StreamEncoder *encoder, const ::FLAC__StreamMetadata *metadata, void *client_data);
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private:
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// Private and undefined so you can't use them:
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Stream(const Stream &);
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void operator=(const Stream &);
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};
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/** \ingroup flacpp_encoder
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* \brief
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* This class wraps the ::FLAC__StreamEncoder. If you are
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* not encoding to a file, you may need to use
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* FLAC::Encoder::Stream.
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*
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* The usage of this class is similar to FLAC__StreamEncoder,
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* except instead of providing callbacks to
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* FLAC__stream_encoder_init*_FILE() or
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* FLAC__stream_encoder_init*_file(), you will inherit from this
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* class and override the virtual callback functions with your
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* own implementations, then call init() or init_ogg(). The rest
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* of the calls work the same as in the C layer.
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*
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* There are no mandatory callbacks; all the callbacks from
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* FLAC::Encoder::Stream are implemented here fully and support
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* full post-encode STREAMINFO and SEEKTABLE updating. There is
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* only an optional progress callback which you may override to
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* get periodic reports on the progress of the encode.
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*/
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class FLACPP_API File: public Stream {
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public:
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File();
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virtual ~File();
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virtual ::FLAC__StreamEncoderInitStatus init(FILE *file); ///< See FLAC__stream_encoder_init_FILE()
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virtual ::FLAC__StreamEncoderInitStatus init(const char *filename); ///< See FLAC__stream_encoder_init_file()
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virtual ::FLAC__StreamEncoderInitStatus init(const std::string &filename); ///< See FLAC__stream_encoder_init_file()
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virtual ::FLAC__StreamEncoderInitStatus init_ogg(FILE *file); ///< See FLAC__stream_encoder_init_ogg_FILE()
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virtual ::FLAC__StreamEncoderInitStatus init_ogg(const char *filename); ///< See FLAC__stream_encoder_init_ogg_file()
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virtual ::FLAC__StreamEncoderInitStatus init_ogg(const std::string &filename); ///< See FLAC__stream_encoder_init_ogg_file()
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protected:
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/// See FLAC__StreamEncoderProgressCallback
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virtual void progress_callback(FLAC__uint64 bytes_written, FLAC__uint64 samples_written, unsigned frames_written, unsigned total_frames_estimate);
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/// This is a dummy implementation to satisfy the pure virtual in Stream that is actually supplied internally by the C layer
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virtual ::FLAC__StreamEncoderWriteStatus write_callback(const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame);
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private:
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static void progress_callback_(const ::FLAC__StreamEncoder *encoder, FLAC__uint64 bytes_written, FLAC__uint64 samples_written, unsigned frames_written, unsigned total_frames_estimate, void *client_data);
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// Private and undefined so you can't use them:
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File(const Stream &);
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void operator=(const Stream &);
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};
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}
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}
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#endif
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