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Introduced extraction of .au (but not its usage within cdrskin)

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This commit is contained in:
Thomas Schmitt
2006-10-24 07:50:31 +00:00
parent f78cc40041
commit 0d26beb2ed
5 changed files with 148 additions and 45 deletions
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45
libburn/libdax_audioxtr.h
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@@ -46,18 +46,19 @@ int libdax_audioxtr_new(struct libdax_audioxtr **xtr, char *path, int flag);
/** Obtain identification parameters of opened audio source.
@param xtr Opaque handle to extractor
@param fmt Gets pointed to the audio file format id text: ".wav"
@param fmt Gets pointed to the audio file format id text: ".wav" , ".au"
@param fmt_info Gets pointed to a format info text telling parameters
@param num_channels e.g. 1=mono, 2=stereo, etc
@param sample_rate e.g. 11025, 44100
@param bits_per_sample e.g. 8= 8 bits per sample, 16= 16 bits ...
@param msb_first Byte order of samples: 0=Intel 1=Motorola
@param flag Bitfield for control purposes (unused yet, submit 0)
@return >0 success, <=0 failure
*/
int libdax_audioxtr_get_id(struct libdax_audioxtr *xtr,
char **fmt, char **fmt_info,
int *num_channels, int *sample_rate,
int *bits_per_sample, int flag);
int *bits_per_sample, int *msb_first, int flag);
/** Obtain a prediction about the extracted size based on internal information
@@ -136,7 +137,7 @@ struct libdax_audioxtr {
/* Source of the encoded audio data */
char path[LIBDAX_AUDIOXTR_STRLEN];
/* File descriptor to path */
/* File descriptor to path. Anything else than 0 must be lseek-able */
int fd;
/* Format identifier. E.g. ".wav" */
@@ -145,6 +146,18 @@ struct libdax_audioxtr {
/* Format parameter info text */
char fmt_info[LIBDAX_AUDIOXTR_STRLEN];
/* 1= mono, 2= stereo, etc. */
int num_channels;
/* 8000, 44100, etc. */
int sample_rate;
/* 8 bits = 8, 16 bits = 16, etc. */
int bits_per_sample;
/* Byte order of samples: 0=Intel 1=Motorola */
int msb_first;
/* Number of bytes to extract (0= unknown/unlimited) */
off_t data_size;
@@ -157,19 +170,20 @@ struct libdax_audioxtr {
/* MS WAVE Format */
/* info used: http://ccrma.stanford.edu/courses/422/projects/WaveFormat/ */
/* 1= mono, 2= stereo, etc. */
int wav_num_channels;
/* 8000, 44100, etc. */
int wav_sample_rate;
/* 8 bits = 8, 16 bits = 16, etc. */
int wav_bits_per_sample;
/* == NumSamples * NumChannels * BitsPerSample/8
This is the number of bytes in the data. */
unsigned wav_subchunk2_size;
/* Sun Audio, .au */
/* info used: http://www.opengroup.org/public/pubs/external/auformat.html */
/* Number of bytes in non-payload header part */
unsigned au_data_location;
/* Number of payload bytes or 0xffffffff */
unsigned au_data_size;
};
@@ -186,8 +200,15 @@ static int libdax_audioxtr_open(struct libdax_audioxtr *o, int flag);
*/
static int libdax_audioxtr_identify(struct libdax_audioxtr *o, int flag);
/** Specialized identifier for .wav */
static int libdax_audioxtr_identify_wav(struct libdax_audioxtr *o, int flag);
/** Specialized identifier for .au */
static int libdax_audioxtr_identify_au(struct libdax_audioxtr *o, int flag);
/** Convert a byte string into a number (currently only little endian)
@param flag Bitfield for control purposes
bit0=msb_first
@return The resulting number
*/
static unsigned libdax_audioxtr_to_int(struct libdax_audioxtr *o,