Autres/audacity
1
0
Fork 0
mirror of https://github.com/cookiengineer/audacity synced 2025-04-30 15:49:41 +02:00
Code Issues Releases Wiki Activity
audacity/lib-src/twolame/libtwolame/twolame.h
lllucius 3effa9693f Update twolame to 0.3.13.
2013-10-24 04:32:13 +00:00

924 lines
26 KiB
C
Raw Blame History

/*
* TwoLAME: an optimized MPEG Audio Layer Two encoder
*
* Copyright (C) 2001-2004 Michael Cheng
* Copyright (C) 2004-2006 The TwoLAME Project
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id$
*
*/
#ifndef __TWOLAME_H__
#define __TWOLAME_H__
#ifdef __cplusplus
extern "C" {
#endif
/** \file twolame.h */
/*
* ATTENTION WIN32 USERS!
*
* By default, when you use this header file, it is configured to use
* symbols from the "twolame.dll" file. If you use the static version of
* the library, define LIBTWOLAME_STATIC prior to including this header.
*/
#ifdef _WIN32
#ifdef LIBTWOLAME_STATIC
#define DLL_EXPORT
#else
#ifdef LIBTWOLAME_DLL_EXPORTS
#define DLL_EXPORT __declspec(dllexport)
#else
#define DLL_EXPORT __declspec(dllimport)
#endif
#endif
#else
#define DLL_EXPORT
#endif
#ifndef TRUE
#define TRUE (1)
#endif
#ifndef FALSE
#define FALSE (0)
#endif
/** MPEG modes */
typedef enum {
TWOLAME_AUTO_MODE = -1,
/**< Choose Mode Automatically */
TWOLAME_STEREO = 0, /**< Stereo */
TWOLAME_JOINT_STEREO,
/**< Joint Stereo */
TWOLAME_DUAL_CHANNEL,
/**< Dual Channel */
TWOLAME_MONO, /**< Mono */
TWOLAME_NOT_SET
} TWOLAME_MPEG_mode;
/** MPEG Version.
*
* MPEG2 is for Lower Sampling Frequencies - LSF < 32000.
*/
typedef enum {
TWOLAME_MPEG2 = 0,
/**< MPEG-2 - for sample rates less than 32k */
TWOLAME_MPEG1 /**< MPEG-1 */
} TWOLAME_MPEG_version;
/** Padding types. */
typedef enum {
TWOLAME_PAD_NO = 0, /**< No Padding */
TWOLAME_PAD_ALL /**< Pad all frames */
// TWOLAME_PAD_ADJUST // unsupported by twolame
} TWOLAME_Padding;
/** Emphasis types. */
typedef enum {
TWOLAME_EMPHASIS_N = 0,
/**< No Emphasis */
TWOLAME_EMPHASIS_5 = 1,
/**< 50/15 ms */
// reserved
TWOLAME_EMPHASIS_C = 3
/**< CCIT J.17 */
} TWOLAME_Emphasis;
/** Number of samples per frame of Layer 2 MPEG Audio */
#define TWOLAME_SAMPLES_PER_FRAME (1152)
/** Opaque structure for the twolame encoder options. */
struct twolame_options_struct;
/** Opaque data type for the twolame encoder options. */
typedef struct twolame_options_struct twolame_options;
/** Get the version number of the TwoLAME library.
* eg "0.3.1".
*
* \return The version number as a C string
*/
DLL_EXPORT const char *get_twolame_version(void);
/** Get the URL of the TwoLAME homepage.
* eg "http://www.twolame.org/".
*
* \return The url as a C string
*/
DLL_EXPORT const char *get_twolame_url(void);
/** Print the library version and
* encoder parameter settings to STDERR.
*
* Will display differnent ammounts of information
* depending on the verbosity setting.
* If verbosity is set to 0 then no message will be displayed.
*
* \param glopts Options pointer created by twolame_init()
*
*/
DLL_EXPORT void twolame_print_config(twolame_options * glopts);
/** Initialise the twolame encoder.
*
* Sets defaults for all parameters.
* Will return NULL if malloc() failed, otherwise
* returns a pointer which you then need to pass to
* all future API calls.
*
* \return a pointer to your new options data structure
*/
DLL_EXPORT twolame_options *twolame_init(void);
/** Prepare to start encoding.
*
* You must call twolame_init_params() before you start encoding.
* It will check call your parameters to make sure they are valid,
* as well as allocating buffers and initising internally used
* variables.
*
* \param glopts Options pointer created by twolame_init()
* \return 0 if all patameters are valid,
* non-zero if something is invalid
*/
DLL_EXPORT int twolame_init_params(twolame_options * glopts);
/** Encode some 16-bit PCM audio to MP2.
*
* Takes 16-bit PCM audio samples from seperate left and right
* buffers and places encoded audio into mp2buffer.
*
* \param glopts twolame options pointer
* \param leftpcm Left channel audio samples
* \param rightpcm Right channel audio samples
* \param num_samples Number of samples per channel
* \param mp2buffer Buffer to place encoded audio into
* \param mp2buffer_size Size of the output buffer
* \return The number of bytes put in output buffer
* or a negative value on error
*/
DLL_EXPORT int twolame_encode_buffer(twolame_options * glopts,
const short int leftpcm[],
const short int rightpcm[],
int num_samples,
unsigned char *mp2buffer, int mp2buffer_size);
/** Encode some 16-bit PCM audio to MP2.
*
* Takes interleaved 16-bit PCM audio samples from a single
* buffer and places encoded audio into mp2buffer.
*
* \param glopts twolame options pointer
* \param pcm Audio samples for left AND right channels
* \param num_samples Number of samples per channel
* \param mp2buffer Buffer to place encoded audio into
* \param mp2buffer_size Size of the output buffer
* \return The number of bytes put in output buffer
* or a negative value on error
*/
DLL_EXPORT int twolame_encode_buffer_interleaved(twolame_options * glopts,
const short int pcm[],
int num_samples,
unsigned char *mp2buffer, int mp2buffer_size);
/** Encode some 32-bit PCM audio to MP2.
*
* Takes 32-bit floating point PCM audio samples from seperate
* left and right buffers and places encoded audio into mp2buffer.
*
* Note: the 32-bit samples are currently scaled down to
* 16-bit samples internally.
*
* \param glopts twolame options pointer
* \param leftpcm Left channel audio samples
* \param rightpcm Right channel audio samples
* \param num_samples Number of samples per channel
* \param mp2buffer Buffer to place encoded audio into
* \param mp2buffer_size Size of the output buffer
* \return The number of bytes put in output buffer
* or a negative value on error
*/
DLL_EXPORT int twolame_encode_buffer_float32(twolame_options * glopts,
const float leftpcm[],
const float rightpcm[],
int num_samples,
unsigned char *mp2buffer, int mp2buffer_size);
/** Encode some 32-bit PCM audio to MP2.
*
* Takes 32-bit floating point PCM audio samples from a single
* buffer and places encoded audio into mp2buffer.
*
* \param glopts twolame options pointer
* \param pcm Audio samples for left AND right channels
* \param num_samples Number of samples per channel
* \param mp2buffer Buffer to place encoded audio into
* \param mp2buffer_size Size of the output buffer
* \return The number of bytes put in output buffer
* or a negative value on error
*/
int twolame_encode_buffer_float32_interleaved(twolame_options * glopts,
const float pcm[],
int num_samples,
unsigned char *mp2buffer, int mp2buffer_size);
/** Encode any remains buffered PCM audio to MP2.
*
* Encodes any remaining audio samples in the libtwolame
* internal sample buffer. This function will return at
* most a single frame of MPEG Audio, and at least 0 frames.
*
* \param glopts twolame options pointer
* \param mp2buffer Buffer to place encoded audio into
* \param mp2buffer_size Size of the output buffer
* \return The number of bytes put in output buffer
* or a negative value on error
*/
DLL_EXPORT int twolame_encode_flush(twolame_options * glopts,
unsigned char *mp2buffer, int mp2buffer_size);
/** Shut down the twolame encoder.
*
* Shuts down the twolame encoder and frees all memory
* that it previously allocated. You should call this
* once you have finished all your encoding. This function
* will set your glopts pointer to NULL for you.
*
* \param glopts pointer to twolame options pointer
*/
DLL_EXPORT void twolame_close(twolame_options ** glopts);
/** Set the verbosity of the encoder.
*
* Sets how verbose the encoder is with the debug and
* informational messages it displays. The higher the
* number, the more messages it will display.
* Set to 0 for no status messages to STDERR
* ( error messages will still be displayed ).
*
* Default: 1
*
* \param glopts pointer to twolame options pointer
* \param verbosity integer between 0 and 10
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_verbosity(twolame_options * glopts, int verbosity);
/** Get the verbosity of the encoder.
*
* \param glopts pointer to twolame options pointer
* \return integer indicating the verbosity of the encoder (0-10)
*/
DLL_EXPORT int twolame_get_verbosity(twolame_options * glopts);
/** Set the MPEG Audio Mode (Mono, Stereo, etc) for
* the output stream.
*
* Default: TWOLAME_AUTO_MODE
*
* \param glopts pointer to twolame options pointer
* \param mode the mode to set to
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_mode(twolame_options * glopts, TWOLAME_MPEG_mode mode);
/** Get the MPEG Audio mode of the output stream.
*
* \param glopts pointer to twolame options pointer
* \return the MPEG audio mode
*/
DLL_EXPORT TWOLAME_MPEG_mode twolame_get_mode(twolame_options * glopts);
/** Get a string name for the current MPEG Audio mode.
*
* \param glopts pointer to twolame options pointer
* \return the name of the MPEG audio mode as a string
*/
DLL_EXPORT const char *twolame_get_mode_name(twolame_options * glopts);
/** Set the MPEG version of the MPEG audio stream.
*
* Default: TWOLAME_MPEG1
*
* \param glopts pointer to twolame options pointer
* \param version the version to set to
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_version(twolame_options * glopts, TWOLAME_MPEG_version version);
/** Get the MPEG version of the output stream.
*
* \param glopts pointer to twolame options pointer
* \return the MPEG version
*/
DLL_EXPORT TWOLAME_MPEG_version twolame_get_version(twolame_options * glopts);
/** Get a string name for the current MPEG version.
*
* \param glopts pointer to twolame options pointer
* \return the name of the MPEG version as a string
*/
DLL_EXPORT const char *twolame_get_version_name(twolame_options * glopts);
/** Get the number of bytes per MPEG audio frame, for current settings.
*
* \param glopts pointer to twolame options pointer
* \return the number of bytes per frame
*
*/
DLL_EXPORT int twolame_get_framelength(twolame_options * glopts);
/** Set the Psychoacoustic Model used to encode the audio.
*
* Default: 3
*
* \param glopts pointer to twolame options pointer
* \param psymodel the psychoacoustic model number
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_psymodel(twolame_options * glopts, int psymodel);
/** Get the Psychoacoustic Model used to encode the audio.
*
* \param glopts pointer to twolame options pointer
* \return the psychoacoustic model number
*/
DLL_EXPORT int twolame_get_psymodel(twolame_options * glopts);
/** Set the number of channels in the input stream.
*
* If this is different the number of channels in
* the output stream (set by mode) then the encoder
* will automatically downmix/upmix the audio.
*
* Default: 2
*
* \param glopts pointer to twolame options pointer
* \param num_channels the number of input channels
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_num_channels(twolame_options * glopts, int num_channels);
/** Get the number of channels in the input stream.
*
* \param glopts pointer to twolame options pointer
* \return the number of channels
*/
DLL_EXPORT int twolame_get_num_channels(twolame_options * glopts);
/** Set the scaling level for audio before encoding.
*
* Set to 0 to disable.
*
* Default: 0
*
* \param glopts pointer to twolame options pointer
* \param scale the amount to scale by
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_scale(twolame_options * glopts, float scale);
/** Get the scaling level for audio before encoding.
*
* \param glopts pointer to twolame options pointer
* \return the amount to scale audio sample by
*/
DLL_EXPORT float twolame_get_scale(twolame_options * glopts);
/** Set the scaling level for left channel audio before encoding.
*
* Set to 0 to disable.
*
* Default: 0
*
* \param glopts pointer to twolame options pointer
* \param scale the amount to scale by
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_scale_left(twolame_options * glopts, float scale);
/** Get the scaling level for audio left channel before encoding.
*
* \param glopts pointer to twolame options pointer
* \return the amount to scale left channel audio samples by
*/
DLL_EXPORT float twolame_get_scale_left(twolame_options * glopts);
/** Set the scaling level for right channel audio before encoding.
*
* Set to 0 to disable.
*
* Default: 0
*
* \param glopts pointer to twolame options pointer
* \param scale the amount to scale by
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_scale_right(twolame_options * glopts, float scale);
/** Get the scaling level for audio right channel before encoding.
*
* \param glopts pointer to twolame options pointer
* \return the amount to scale right channel audio samples by
*/
DLL_EXPORT float twolame_get_scale_right(twolame_options * glopts);
/** Set the samplerate of the PCM audio input.
*
* Default: 44100
*
* \param glopts pointer to twolame options pointer
* \param samplerate the samplerate in Hz
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_in_samplerate(twolame_options * glopts, int samplerate);
/** Get the samplerate of the PCM audio input.
*
* \param glopts pointer to twolame options pointer
* \return the input samplerate
*/
DLL_EXPORT int twolame_get_in_samplerate(twolame_options * glopts);
/** Set the samplerate of the MPEG audio output.
*
* Default: 44100
*
* \param glopts pointer to twolame options pointer
* \param samplerate the samplerate in Hz
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_out_samplerate(twolame_options * glopts, int samplerate);
/** Get the samplerate of the MPEG audio output.
*
* \param glopts pointer to twolame options pointer
* \return the output samplerate
*/
DLL_EXPORT int twolame_get_out_samplerate(twolame_options * glopts);
/** Set the bitrate of the MPEG audio output stream.
*
* Default: 192
*
* \param glopts pointer to twolame options pointer
* \param bitrate the bitrate in kbps
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_bitrate(twolame_options * glopts, int bitrate);
/** Get the bitrate of the MPEG audio output.
*
* \param glopts pointer to twolame options pointer
* \return the output bitrate in kbps
*/
DLL_EXPORT int twolame_get_bitrate(twolame_options * glopts);
/** Set the bitrate of the MPEG audio output stream (LAME style).
*
* same as twolame_set_bitrate()
*/
DLL_EXPORT int twolame_set_brate(twolame_options * glopts, int bitrate);
/** Get the bitrate of the MPEG audio output stream (LAME style).
*
* same as twolame_get_bitrate()
*/
DLL_EXPORT int twolame_get_brate(twolame_options * glopts);
/** Set frame padding for the MPEG audio output stream.
*
* i.e. adjust frame sizes to achieve overall target bitrate
*
* Default: TWOLAME_PAD_NO
*
* \param glopts pointer to twolame options pointer
* \param padding the padding type
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_padding(twolame_options * glopts, TWOLAME_Padding padding);
/** Get the padding type of the MPEG audio output.
*
* \param glopts pointer to twolame options pointer
* \return the output bitrate in kbps
*/
DLL_EXPORT TWOLAME_Padding twolame_get_padding(twolame_options * glopts);
/** Enable/Disable Energy Level Extension.
*
* Enable writing the peak PCM level (energy level) at the end of each
* MPEG audio frame (in the ancillary bits). This function will
* automatically call twolame_set_num_ancillary_bits() to set the required
* number of ancillary bits for this feature.
*
* The energy level extension is commonly used in the broadcast industry
* for visualising the audio in editing applications without decoding.
*
* Default: FALSE
*
* \param glopts pointer to twolame options pointer
* \param energylevels energy level extension state (TRUE/FALSE)
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_energy_levels(twolame_options * glopts, int energylevels);
/** Get the Energy Level Extension state.
*
* \param glopts pointer to twolame options pointer
* \return state of the Energy Level Extension (TRUE/FALSE)
*/
DLL_EXPORT int twolame_get_energy_levels(twolame_options * glopts);
/** Set number of Ancillary Bits at end of frame.
*
* Default: 0
*
* \param glopts pointer to twolame options pointer
* \param num number of bits to reserve
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_num_ancillary_bits(twolame_options * glopts, int num);
/** Get the number of Ancillary Bits at end of frame.
*
* \param glopts pointer to twolame options pointer
* \return number of Ancillary Bits at end of frame
*/
DLL_EXPORT int twolame_get_num_ancillary_bits(twolame_options * glopts);
/** Set the type of pre-emphasis to be applied to the decoded audio.
*
* Default: TWOLAME_EMPHASIS_N
*
* \param glopts pointer to twolame options pointer
* \param emphasis the type of pre-emphasis
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_emphasis(twolame_options * glopts, TWOLAME_Emphasis emphasis);
/** Get the type of pre-emphasis to be applied to the decoded audio.
*
* \param glopts pointer to twolame options pointer
* \return the type of pre-emphasis
*/
DLL_EXPORT TWOLAME_Emphasis twolame_get_emphasis(twolame_options * glopts);
/** Enable/Disable CRC Error Protection.
*
* Default: FALSE
*
* \param glopts pointer to twolame options pointer
* \param err_protection error protection state (TRUE/FALSE)
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_error_protection(twolame_options * glopts, int err_protection);
/** Get the CRC Error Protection state.
*
* \param glopts pointer to twolame options pointer
* \return state of Error Protection (TRUE/FALSE)
*/
DLL_EXPORT int twolame_get_error_protection(twolame_options * glopts);
/** Set the MPEG Audio Copyright flag.
*
* Indicates that MPEG stream is copyrighted.
*
* Default: FALSE
*
* \param glopts pointer to twolame options pointer
* \param copyright copyright flag state (TRUE/FALSE)
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_copyright(twolame_options * glopts, int copyright);
/** Get the copright flag state
*
* \param glopts pointer to twolame options pointer
* \return state of the copyright flag (TRUE/FALSE)
*/
DLL_EXPORT int twolame_get_copyright(twolame_options * glopts);
/** Set the MPEG Audio Original flag.
*
* Default: FALSE
*
* \param glopts pointer to twolame options pointer
* \param original original flag state (TRUE/FALSE)
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_original(twolame_options * glopts, int original);
/** Get the origianl flag state.
*
* \param glopts pointer to twolame options pointer
* \return state of the original flag (TRUE/FALSE)
*/
DLL_EXPORT int twolame_get_original(twolame_options * glopts);
/** Enable/Disable VBR (Variable Bit Rate) mode.
*
* Default: FALSE
*
* \param glopts pointer to twolame options pointer
* \param vbr VBR state (TRUE/FALSE)
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_VBR(twolame_options * glopts, int vbr);
/** Get the VBR state.
*
* \param glopts pointer to twolame options pointer
* \return state of VBR (TRUE/FALSE)
*/
DLL_EXPORT int twolame_get_VBR(twolame_options * glopts);
/** Set the level/quality of the VBR audio.
*
* The level value can is a measurement of quality - the higher
* the level the higher the average bitrate of the resultant file.
*
* Default: 5.0
*
* \param glopts pointer to twolame options pointer
* \param level quality level (-10 to 10)
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_VBR_level(twolame_options * glopts, float level);
/** Get the level/quality of the VBR audio.
*
* \param glopts pointer to twolame options pointer
* \return quality value for VBR
*/
DLL_EXPORT float twolame_get_VBR_level(twolame_options * glopts);
/*
Using the twolame_set_VBR_q()/twolame_get_VBR_q functions
are deprecated, please use twolame_set_VBR_level() instead.
*/
DLL_EXPORT int twolame_set_VBR_q(twolame_options * glopts, float level);
DLL_EXPORT float twolame_get_VBR_q(twolame_options * glopts);
/** Set the adjustment (in dB) applied to the ATH for Psycho models 3 and 4.
*
* Default: 0.0
*
* \param glopts pointer to twolame options pointer
* \param level adjustment level in db
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_ATH_level(twolame_options * glopts, float level);
/** Get the adjustment (in dB) applied to the ATH for Psycho models 3 and 4.
*
* \param glopts pointer to twolame options pointer
* \return adjustment level in db
*/
DLL_EXPORT float twolame_get_ATH_level(twolame_options * glopts);
/** Set the upper bitrate for VBR
*
* Default: 0 (off)
*
* \param glopts pointer to twolame options pointer
* \param bitrate upper bitrate for VBR
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_VBR_max_bitrate_kbps(twolame_options * glopts, int bitrate);
/** Get the upper bitrate for VBR.
*
* \param glopts pointer to twolame options pointer
* \return the upper bitrate for VBR
*/
DLL_EXPORT int twolame_get_VBR_max_bitrate_kbps(twolame_options * glopts);
/** Enable/Disable the quick mode for psycho model calculation.
*
* Default: FALSE
*
* \param glopts pointer to twolame options pointer
* \param quickmode the state of quick mode (TRUE/FALSE)
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_quick_mode(twolame_options * glopts, int quickmode);
/** Get the state of quick mode.
*
* \param glopts pointer to twolame options pointer
* \return the state of quick mode (TRUE/FALSE)
*/
DLL_EXPORT int twolame_get_quick_mode(twolame_options * glopts);
/** Set how often the psy model is calculated.
*
* Default: 10
*
* \param glopts pointer to twolame options pointer
* \param quickcount number of frames between calculations
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_quick_count(twolame_options * glopts, int quickcount);
/** Get the how often the psy model is calculated.
*
* \param glopts pointer to twolame options pointer
* \return number of frames between calculations
*/
DLL_EXPORT int twolame_get_quick_count(twolame_options * glopts);
/* WARNING: DAB support is currently broken */
/** Enable/Disable the Eureka 147 DAB extensions for MP2.
*
* Default: FALSE
*
* \param glopts pointer to twolame options pointer
* \param dab state of DAB extensions (TRUE/FALSE)
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_DAB(twolame_options * glopts, int dab);
/** Get the state of the DAB extensions
*
* \param glopts pointer to twolame options pointer
* \return the state of DAB (TRUE/FALSE)
*/
DLL_EXPORT int twolame_get_DAB(twolame_options * glopts);
/** Set the number of bytes to reserve for DAB XPAD data.
*
* Default: 0
*
* \param glopts pointer to twolame options pointer
* \param length number of bytes to reserve
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_DAB_xpad_length(twolame_options * glopts, int length);
/** Get the number of bytes reserved for DAB XPAD data.
*
* \param glopts pointer to twolame options pointer
* \return number of XPAD bytes
*/
DLL_EXPORT int twolame_get_DAB_xpad_length(twolame_options * glopts);
/** Set the CRC error protection length for DAB.
*
* Default: 2
*
* \param glopts pointer to twolame options pointer
* \param length length of DAB CRC
* \return 0 if successful,
* non-zero on failure
*/
DLL_EXPORT int twolame_set_DAB_crc_length(twolame_options * glopts, int length);
/** Get the CRC error protection length for DAB.
*
* \param glopts pointer to twolame options pointer
* \return length of DAB CRC
*/
DLL_EXPORT int twolame_get_DAB_crc_length(twolame_options * glopts);
#ifdef __cplusplus
}
#endif
#endif /* _TWOLAME_H_ */
// vim:ts=4:sw=4:nowrap:
Reference in New Issue View Git Blame Copy Permalink