static status next_write_header (AFfilehandle file)
{
_Track *track;
int frameSize;
uint32_t offset, length, encoding, sampleRate, channelCount;
track = _af_filehandle_get_track(file, AF_DEFAULT_TRACK);
frameSize = _af_format_frame_size(&track->f, false);
offset = track->fpos_first_frame;
length = track->totalfframes * frameSize;
encoding = nextencodingtype(&track->f);
sampleRate = track->f.sampleRate;
channelCount = track->f.channelCount;
if (af_fseek(file->fh, 0, SEEK_SET) != 0)
_af_error(AF_BAD_LSEEK, "bad seek");
af_fwrite(".snd", 4, 1, file->fh);
af_write_uint32_be(&offset, file->fh);
af_write_uint32_be(&length, file->fh);
af_write_uint32_be(&encoding, file->fh);
af_write_uint32_be(&sampleRate, file->fh);
af_write_uint32_be(&channelCount, file->fh);
return AF_SUCCEED;
}
static status next_write_header (AFfilehandle file)
{
_Track *track;
int frameSize;
u_int32_t offset, length, encoding, sampleRate, channelCount;
track = _af_filehandle_get_track(file, AF_DEFAULT_TRACK);
frameSize = _af_format_frame_size(&track->f, AF_FALSE);
if (track->f.compressionType == AF_COMPRESSION_G711_ULAW ||
track->f.compressionType == AF_COMPRESSION_G711_ALAW)
frameSize = frameSize / 2;
offset = HOST_TO_BENDIAN_INT32(track->fpos_first_frame);
length = HOST_TO_BENDIAN_INT32(track->totalfframes * frameSize);
encoding = HOST_TO_BENDIAN_INT32(nextencodingtype(&track->f));
sampleRate = HOST_TO_BENDIAN_INT32(track->f.sampleRate);
channelCount = HOST_TO_BENDIAN_INT32(track->f.channelCount);
if (af_fseek(file->fh, 0, SEEK_SET) != 0)
_af_error(AF_BAD_LSEEK, "bad seek");
af_fwrite(".snd", 4, 1, file->fh);
af_fwrite(&offset, 4, 1, file->fh);
af_fwrite(&length, 4, 1, file->fh);
af_fwrite(&encoding, 4, 1, file->fh);
af_fwrite(&sampleRate, 4, 1, file->fh);
af_fwrite(&channelCount, 4, 1, file->fh);
return AF_SUCCEED;
}
status _af_wave_update (AFfilehandle file)
{
_Track *track;
track = _af_filehandle_get_track(file, AF_DEFAULT_TRACK);
if (track->fpos_first_frame != 0)
{
size_t dataLength, fileLength;
/*
We call _af_format_frame_size to calculate the
frame size of normal PCM data or compressed data.
*/
dataLength = track->totalfframes * _af_format_frame_size(&track->f, AF_FALSE);
dataLength = HOST_TO_LENDIAN_INT32(dataLength);
af_fseek(file->fh, track->fpos_first_frame - 4, SEEK_SET);
af_fwrite(&dataLength, 4, 1, file->fh);
fileLength = af_flength(file->fh);
fileLength -= 8;
fileLength = HOST_TO_LENDIAN_INT32(fileLength);
af_fseek(file->fh, 4, SEEK_SET);
af_fwrite(&fileLength, 4, 1, file->fh);
}
return AF_SUCCEED;
}
float afGetVirtualFrameSize (AFfilehandle file, int trackid, int stretch3to4)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
return _af_format_frame_size(&track->v, stretch3to4);
}
status RawFile::readInit(AFfilesetup fileSetup)
{
if (!fileSetup)
{
_af_error(AF_BAD_FILESETUP, "a valid AFfilesetup is required for reading raw data");
return AF_FAIL;
}
if (initFromSetup(fileSetup) == AF_FAIL)
return AF_FAIL;
TrackSetup *trackSetup = fileSetup->getTrack();
if (!trackSetup)
return AF_FAIL;
Track *track = getTrack();
/* Set the track's data offset. */
if (trackSetup->dataOffsetSet)
track->fpos_first_frame = trackSetup->dataOffset;
else
track->fpos_first_frame = 0;
/* Set the track's frame count. */
if (trackSetup->frameCountSet)
{
track->totalfframes = trackSetup->frameCount;
}
else
{
AFfileoffset filesize = m_fh->length();
if (filesize == -1)
track->totalfframes = -1;
else
{
/* Ensure that the data offset is valid. */
if (track->fpos_first_frame > filesize)
{
_af_error(AF_BAD_FILESETUP, "data offset is larger than file size");
return AF_FAIL;
}
filesize -= track->fpos_first_frame;
track->totalfframes = filesize / (int) _af_format_frame_size(&track->f, false);
}
track->data_size = filesize;
}
return AF_SUCCEED;
}
status _af_wave_update (AFfilehandle file)
{
_Track *track;
_WAVEInfo *wave = (_WAVEInfo *) file->formatSpecific;
track = _af_filehandle_get_track(file, AF_DEFAULT_TRACK);
if (track->fpos_first_frame != 0)
{
u_int32_t dataLength, fileLength;
/* Update the frame count chunk if present. */
WriteFrameCount(file);
/* Update the length of the data chunk. */
af_fseek(file->fh, wave->dataSizeOffset, SEEK_SET);
/*
We call _af_format_frame_size to calculate the
frame size of normal PCM data or compressed data.
*/
dataLength = (u_int32_t) track->totalfframes *
_af_format_frame_size(&track->f, AF_FALSE);
dataLength = HOST_TO_LENDIAN_INT32(dataLength);
af_fwrite(&dataLength, 4, 1, file->fh);
/* Update the length of the RIFF chunk. */
fileLength = (u_int32_t) af_flength(file->fh);
fileLength -= 8;
fileLength = HOST_TO_LENDIAN_INT32(fileLength);
af_fseek(file->fh, 4, SEEK_SET);
af_fwrite(&fileLength, 4, 1, file->fh);
}
/*
Write the actual data that was set after initializing
the miscellaneous IDs. The size of the data will be
unchanged.
*/
WriteMiscellaneous(file);
/* Write the new positions; the size of the data will be unchanged. */
WriteCues(file);
return AF_SUCCEED;
}
static status WriteData (AFfilehandle file)
{
_Track *track;
uint32_t chunkSize;
_WAVEInfo *waveinfo;
assert(file);
waveinfo = file->formatSpecific;
track = _af_filehandle_get_track(file, AF_DEFAULT_TRACK);
af_fwrite("data", 4, 1, file->fh);
waveinfo->dataSizeOffset = af_ftell(file->fh);
chunkSize = (int) _af_format_frame_size(&track->f, false) *
track->totalfframes;
af_write_uint32_le(&chunkSize, file->fh);
track->fpos_first_frame = af_ftell(file->fh);
return AF_SUCCEED;
}
static status WriteData (AFfilehandle file)
{
_Track *track;
u_int32_t frameSize, chunkSize;
_WAVEInfo *waveinfo;
assert(file);
waveinfo = file->formatSpecific;
track = _af_filehandle_get_track(file, AF_DEFAULT_TRACK);
af_fwrite("data", 4, 1, file->fh);
waveinfo->dataSizeOffset = af_ftell(file->fh);
frameSize = _af_format_frame_size(&track->f, AF_FALSE);
chunkSize = frameSize * track->totalfframes;
chunkSize = HOST_TO_LENDIAN_INT32(chunkSize);
af_fwrite(&chunkSize, 4, 1, file->fh);
track->fpos_first_frame = af_ftell(file->fh);
return AF_SUCCEED;
}
status WAVEFile::readInit(AFfilesetup setup)
{
Tag type, formtype;
uint32_t size;
uint32_t index = 0;
bool hasFormat = false;
bool hasData = false;
bool hasCue = false;
bool hasList = false;
bool hasPlayList = false;
bool hasFrameCount = false;
bool hasINST = false;
Track *track = allocateTrack();
fh->seek(0, File::SeekFromBeginning);
readTag(&type);
readU32(&size);
readTag(&formtype);
assert(type == "RIFF");
assert(formtype == "WAVE");
#ifdef DEBUG
printf("size: %d\n", size);
#endif
/* Include the offset of the form type. */
index += 4;
while (index < size)
{
Tag chunkid;
uint32_t chunksize = 0;
status result;
#ifdef DEBUG
printf("index: %d\n", index);
#endif
readTag(&chunkid);
readU32(&chunksize);
#ifdef DEBUG
printf("%s size: %d\n", chunkid.name().c_str(), chunksize);
#endif
if (chunkid == "fmt ")
{
result = parseFormat(chunkid, chunksize);
if (result == AF_FAIL)
return AF_FAIL;
hasFormat = true;
}
else if (chunkid == "data")
{
/* The format chunk must precede the data chunk. */
if (!hasFormat)
{
_af_error(AF_BAD_HEADER, "missing format chunk in WAVE file");
return AF_FAIL;
}
result = parseData(chunkid, chunksize);
if (result == AF_FAIL)
return AF_FAIL;
hasData = true;
}
else if (chunkid == "inst")
{
result = parseInstrument(chunkid, chunksize);
if (result == AF_FAIL)
return AF_FAIL;
}
else if (chunkid == "fact")
{
hasFrameCount = true;
result = parseFrameCount(chunkid, chunksize);
if (result == AF_FAIL)
return AF_FAIL;
}
else if (chunkid == "cue ")
{
hasCue = true;
result = parseCues(chunkid, chunksize);
if (result == AF_FAIL)
return AF_FAIL;
}
else if (chunkid == "LIST" || chunkid == "list")
{
hasList = true;
result = parseList(chunkid, chunksize);
if (result == AF_FAIL)
return AF_FAIL;
}
else if (chunkid == "INST")
{
hasINST = true;
result = parseInstrument(chunkid, chunksize);
if (result == AF_FAIL)
return AF_FAIL;
}
else if (chunkid == "plst")
{
hasPlayList = true;
result = parsePlayList(chunkid, chunksize);
if (result == AF_FAIL)
return AF_FAIL;
}
index += chunksize + 8;
/* All chunks must be aligned on an even number of bytes */
if ((index % 2) != 0)
index++;
fh->seek(index + 8, File::SeekFromBeginning);
}
/* The format chunk and the data chunk are required. */
if (!hasFormat || !hasData)
{
return AF_FAIL;
}
/*
At this point we know that the file has a format chunk
and a data chunk, so we can assume that track->f and
track->data_size have been initialized.
*/
if (!hasFrameCount)
{
track->totalfframes = track->data_size /
(int) _af_format_frame_size(&track->f, false);
}
if (track->f.compressionType != AF_COMPRESSION_NONE &&
(track->f.compressionType == AF_COMPRESSION_G711_ULAW ||
track->f.compressionType == AF_COMPRESSION_G711_ALAW))
{
track->totalfframes = track->data_size / track->f.channelCount;
}
/*
A return value of AF_SUCCEED indicates successful parsing.
*/
return AF_SUCCEED;
}
status WAVEFile::writeFormat()
{
uint16_t formatTag, channelCount;
uint32_t sampleRate, averageBytesPerSecond;
uint16_t blockAlign;
uint32_t chunkSize;
uint16_t bitsPerSample;
Track *track = getTrack();
fh->write("fmt ", 4);
switch (track->f.compressionType)
{
case AF_COMPRESSION_NONE:
chunkSize = 16;
if (track->f.sampleFormat == AF_SAMPFMT_FLOAT ||
track->f.sampleFormat == AF_SAMPFMT_DOUBLE)
{
formatTag = WAVE_FORMAT_IEEE_FLOAT;
}
else if (track->f.sampleFormat == AF_SAMPFMT_TWOSCOMP ||
track->f.sampleFormat == AF_SAMPFMT_UNSIGNED)
{
formatTag = WAVE_FORMAT_PCM;
}
else
{
_af_error(AF_BAD_COMPTYPE, "bad sample format");
return AF_FAIL;
}
blockAlign = _af_format_frame_size(&track->f, false);
bitsPerSample = 8 * _af_format_sample_size(&track->f, false);
break;
/*
G.711 compression uses eight bits per sample.
*/
case AF_COMPRESSION_G711_ULAW:
chunkSize = 18;
formatTag = IBM_FORMAT_MULAW;
blockAlign = track->f.channelCount;
bitsPerSample = 8;
break;
case AF_COMPRESSION_G711_ALAW:
chunkSize = 18;
formatTag = IBM_FORMAT_ALAW;
blockAlign = track->f.channelCount;
bitsPerSample = 8;
break;
default:
_af_error(AF_BAD_COMPTYPE, "bad compression type");
return AF_FAIL;
}
writeU32(&chunkSize);
writeU16(&formatTag);
channelCount = track->f.channelCount;
writeU16(&channelCount);
sampleRate = track->f.sampleRate;
writeU32(&sampleRate);
averageBytesPerSecond =
track->f.sampleRate * _af_format_frame_size(&track->f, false);
writeU32(&averageBytesPerSecond);
blockAlign = _af_format_frame_size(&track->f, false);
writeU16(&blockAlign);
writeU16(&bitsPerSample);
if (track->f.compressionType == AF_COMPRESSION_G711_ULAW ||
track->f.compressionType == AF_COMPRESSION_G711_ALAW)
{
uint16_t zero = 0;
writeU16(&zero);
}
return AF_SUCCEED;
}
static status WriteFormat (AFfilehandle file)
{
_Track *track = NULL;
uint16_t formatTag, channelCount;
uint32_t sampleRate, averageBytesPerSecond;
uint16_t blockAlign;
uint32_t chunkSize;
uint16_t bitsPerSample;
assert(file != NULL);
track = _af_filehandle_get_track(file, AF_DEFAULT_TRACK);
af_fwrite("fmt ", 4, 1, file->fh);
switch (track->f.compressionType)
{
case AF_COMPRESSION_NONE:
chunkSize = 16;
if (track->f.sampleFormat == AF_SAMPFMT_FLOAT ||
track->f.sampleFormat == AF_SAMPFMT_DOUBLE)
{
formatTag = WAVE_FORMAT_IEEE_FLOAT;
}
else if (track->f.sampleFormat == AF_SAMPFMT_TWOSCOMP ||
track->f.sampleFormat == AF_SAMPFMT_UNSIGNED)
{
formatTag = WAVE_FORMAT_PCM;
}
else
{
_af_error(AF_BAD_COMPTYPE, "bad sample format");
return AF_FAIL;
}
blockAlign = _af_format_frame_size(&track->f, false);
bitsPerSample = 8 * _af_format_sample_size(&track->f, false);
break;
/*
G.711 compression uses eight bits per sample.
*/
case AF_COMPRESSION_G711_ULAW:
chunkSize = 18;
formatTag = IBM_FORMAT_MULAW;
blockAlign = track->f.channelCount;
bitsPerSample = 8;
break;
case AF_COMPRESSION_G711_ALAW:
chunkSize = 18;
formatTag = IBM_FORMAT_ALAW;
blockAlign = track->f.channelCount;
bitsPerSample = 8;
break;
default:
_af_error(AF_BAD_COMPTYPE, "bad compression type");
return AF_FAIL;
}
af_write_uint32_le(&chunkSize, file->fh);
af_write_uint16_le(&formatTag, file->fh);
channelCount = track->f.channelCount;
af_write_uint16_le(&channelCount, file->fh);
sampleRate = track->f.sampleRate;
af_write_uint32_le(&sampleRate, file->fh);
averageBytesPerSecond =
track->f.sampleRate * _af_format_frame_size(&track->f, false);
af_write_uint32_le(&averageBytesPerSecond, file->fh);
blockAlign = _af_format_frame_size(&track->f, false);
af_write_uint16_le(&blockAlign, file->fh);
af_write_uint16_le(&bitsPerSample, file->fh);
if (track->f.compressionType == AF_COMPRESSION_G711_ULAW ||
track->f.compressionType == AF_COMPRESSION_G711_ALAW)
{
uint16_t zero = 0;
af_write_uint16_le(&zero, file->fh);
}
return AF_SUCCEED;
}
int afWriteFrames (AFfilehandle file, int trackid, const void *samples,
int nvframes2write)
{
_AFmoduleinst *firstmod;
_AFchunk *userc;
_Track *track;
int bytes_per_vframe;
AFframecount vframe;
if (!_af_filehandle_ok(file))
return -1;
if (!_af_filehandle_can_write(file))
return -1;
if ((track = _af_filehandle_get_track(file, trackid)) == NULL)
return -1;
if (track->ms.modulesdirty)
{
if (_AFsetupmodules(file, track) != AF_SUCCEED)
return -1;
}
/*if (file->seekok) {*/
if (af_fseek(file->fh, track->fpos_next_frame, SEEK_SET) < 0)
{
_af_error(AF_BAD_LSEEK, "unable to position write pointer at next frame");
return -1;
}
/* } */
bytes_per_vframe = _af_format_frame_size(&track->v, AF_TRUE);
firstmod = &track->ms.module[0];
userc = &track->ms.chunk[0];
track->filemodhappy = AF_TRUE;
vframe = 0;
#ifdef UNLIMITED_CHUNK_NVFRAMES
/*
OPTIMIZATION: see the comment at the very end of
arrangemodules() in modules.c for an explanation of this:
*/
if (!trk->ms.mustuseatomicnvframes)
{
userc->buf = (char *)buf;
userc->nframes = nvframes2write;
(*firstmod->mod->run_push)(firstmod);
/* Count this chunk if there was no i/o error. */
if (trk->filemodhappy)
vframe += userc->nframes;
}
else
#else
/* Optimization must be off. */
assert(track->ms.mustuseatomicnvframes);
#endif
{
while (vframe < nvframes2write)
{
userc->buf = (char *) samples + bytes_per_vframe * vframe;
if (vframe <= nvframes2write - _AF_ATOMIC_NVFRAMES)
userc->nframes = _AF_ATOMIC_NVFRAMES;
else
userc->nframes = nvframes2write - vframe;
(*firstmod->mod->run_push)(firstmod);
if (track->filemodhappy == AF_FALSE)
break;
vframe += userc->nframes;
}
}
track->nextvframe += vframe;
track->totalvframes += vframe;
return vframe;
}
int afReadFrames (AFfilehandle file, int trackid, void *samples,
int nvframeswanted)
{
_Track *track;
_AFmoduleinst *firstmod;
_AFchunk *userc;
AFframecount nvframesleft, nvframes2read;
int bytes_per_vframe;
AFframecount vframe;
if (!_af_filehandle_ok(file))
return -1;
if (!_af_filehandle_can_read(file))
return -1;
if ((track = _af_filehandle_get_track(file, trackid)) == NULL)
return -1;
if (track->ms.modulesdirty)
{
if (_AFsetupmodules(file, track) != AF_SUCCEED)
return -1;
}
/*if (file->seekok) {*/
if (af_fseek(file->fh, track->fpos_next_frame, SEEK_SET) < 0)
{
_af_error(AF_BAD_LSEEK, "unable to position read pointer at next frame");
return -1;
}
/* } */
if (track->totalvframes == -1)
nvframes2read = nvframeswanted;
else
{
nvframesleft = track->totalvframes - track->nextvframe;
nvframes2read = (nvframeswanted > nvframesleft) ?
nvframesleft : nvframeswanted;
}
bytes_per_vframe = _af_format_frame_size(&track->v, AF_TRUE);
firstmod = &track->ms.module[track->ms.nmodules-1];
userc = &track->ms.chunk[track->ms.nmodules];
track->filemodhappy = AF_TRUE;
vframe = 0;
if (!track->ms.mustuseatomicnvframes)
{
assert(track->frames2ignore == 0);
userc->buf = samples;
userc->nframes = nvframes2read;
(*firstmod->mod->run_pull)(firstmod);
if (track->filemodhappy)
vframe += userc->nframes;
}
else
{
bool eof = AF_FALSE;
if (track->frames2ignore != 0)
{
userc->nframes = track->frames2ignore;
userc->buf = _af_malloc(track->frames2ignore * bytes_per_vframe);
if (userc->buf == AF_NULL)
return 0;
(*firstmod->mod->run_pull)(firstmod);
/* Have we hit EOF? */
if (userc->nframes < track->frames2ignore)
eof = AF_TRUE;
track->frames2ignore = 0;
free(userc->buf);
userc->buf = NULL;
}
/*
Now start reading useful frames, until EOF or
premature EOF.
*/
while (track->filemodhappy && !eof && vframe < nvframes2read)
{
AFframecount nvframes2pull;
userc->buf = (char *) samples + bytes_per_vframe * vframe;
if (vframe <= nvframes2read - _AF_ATOMIC_NVFRAMES)
nvframes2pull = _AF_ATOMIC_NVFRAMES;
else
nvframes2pull = nvframes2read - vframe;
userc->nframes = nvframes2pull;
(*firstmod->mod->run_pull)(firstmod);
if (track->filemodhappy)
{
vframe += userc->nframes;
if (userc->nframes < nvframes2pull)
eof = AF_TRUE;
}
}
}
track->nextvframe += vframe;
return vframe;
}
status NeXTFile::readInit(AFfilesetup setup)
{
uint32_t id, offset, length, encoding, sampleRate, channelCount;
fh->seek(0, File::SeekFromBeginning);
fh->read(&id, 4);
assert(!memcmp(&id, ".snd", 4));
readU32(&offset);
readU32(&length);
readU32(&encoding);
readU32(&sampleRate);
readU32(&channelCount);
#ifdef DEBUG
printf("id, offset, length, encoding, sampleRate, channelCount:\n"
" %d %d %d %d %d %d\n",
id, offset, length, encoding, sampleRate, channelCount);
#endif
Track *track = allocateTrack();
if (!track)
return AF_FAIL;
track->f.byteOrder = AF_BYTEORDER_BIGENDIAN;
/* Override the compression type later if necessary. */
track->f.compressionType = AF_COMPRESSION_NONE;
track->fpos_first_frame = offset;
off_t lengthAvailable = fh->length() - offset;
if (length == _AU_LENGTH_UNSPECIFIED || static_cast<off_t>(length) > lengthAvailable)
length = lengthAvailable;
track->data_size = length;
switch (encoding)
{
case _AU_FORMAT_MULAW_8:
track->f.sampleWidth = 16;
track->f.sampleFormat = AF_SAMPFMT_TWOSCOMP;
track->f.compressionType = AF_COMPRESSION_G711_ULAW;
break;
case _AU_FORMAT_ALAW_8:
track->f.sampleWidth = 16;
track->f.sampleFormat = AF_SAMPFMT_TWOSCOMP;
track->f.compressionType = AF_COMPRESSION_G711_ALAW;
break;
case _AU_FORMAT_LINEAR_8:
track->f.sampleWidth = 8;
track->f.sampleFormat = AF_SAMPFMT_TWOSCOMP;
break;
case _AU_FORMAT_LINEAR_16:
track->f.sampleWidth = 16;
track->f.sampleFormat = AF_SAMPFMT_TWOSCOMP;
break;
case _AU_FORMAT_LINEAR_24:
track->f.sampleWidth = 24;
track->f.sampleFormat = AF_SAMPFMT_TWOSCOMP;
break;
case _AU_FORMAT_LINEAR_32:
track->f.sampleWidth = 32;
track->f.sampleFormat = AF_SAMPFMT_TWOSCOMP;
break;
case _AU_FORMAT_FLOAT:
track->f.sampleWidth = 32;
track->f.sampleFormat = AF_SAMPFMT_FLOAT;
break;
case _AU_FORMAT_DOUBLE:
track->f.sampleWidth = 64;
track->f.sampleFormat = AF_SAMPFMT_DOUBLE;
break;
default:
/*
This encoding method is not recognized.
*/
_af_error(AF_BAD_SAMPFMT, "bad sample format");
return AF_FAIL;
}
_af_set_sample_format(&track->f, track->f.sampleFormat, track->f.sampleWidth);
track->f.sampleRate = sampleRate;
track->f.channelCount = channelCount;
int frameSize = _af_format_frame_size(&track->f, false);
track->totalfframes = length / frameSize;
#ifdef DEBUG
printf("_af_next_read_init\n");
_af_print_filehandle(file);
#endif
/* The file has been parsed successfully. */
return AF_SUCCEED;
}
static status WriteFormat (AFfilehandle file)
{
_Track *track = NULL;
u_int16_t formatTag, channelCount;
u_int32_t sampleRate, averageBytesPerSecond;
u_int16_t blockAlign;
u_int32_t chunkSize;
u_int16_t bitsPerSample;
_WAVEInfo *waveinfo = NULL;
assert(file != NULL);
track = _af_filehandle_get_track(file, AF_DEFAULT_TRACK);
waveinfo = (_WAVEInfo *) file->formatSpecific;
af_fwrite("fmt ", 4, 1, file->fh);
switch (track->f.compressionType)
{
case AF_COMPRESSION_NONE:
chunkSize = 16;
formatTag = WAVE_FORMAT_PCM;
blockAlign = _af_format_frame_size(&track->f, AF_FALSE);
bitsPerSample = 8 * _af_format_sample_size(&track->f, AF_FALSE);
break;
case AF_COMPRESSION_G711_ULAW:
chunkSize = 18;
formatTag = IBM_FORMAT_MULAW;
blockAlign = _af_format_frame_size(&track->f, AF_FALSE);
bitsPerSample = 8 * _af_format_sample_size(&track->f, AF_FALSE);
break;
case AF_COMPRESSION_G711_ALAW:
chunkSize = 18;
formatTag = IBM_FORMAT_ALAW;
blockAlign = _af_format_frame_size(&track->f, AF_FALSE);
bitsPerSample = 8 * _af_format_sample_size(&track->f, AF_FALSE);
break;
default:
_af_error(AF_BAD_COMPTYPE, "bad compression type");
return AF_FAIL;
}
chunkSize = HOST_TO_LENDIAN_INT32(chunkSize);
af_fwrite(&chunkSize, 4, 1, file->fh);
formatTag = HOST_TO_LENDIAN_INT16(formatTag);
af_fwrite(&formatTag, 2, 1, file->fh);
formatTag = LENDIAN_TO_HOST_INT16(formatTag);
channelCount = track->f.channelCount;
channelCount = HOST_TO_LENDIAN_INT16(channelCount);
af_fwrite(&channelCount, 2, 1, file->fh);
sampleRate = track->f.sampleRate;
sampleRate = HOST_TO_LENDIAN_INT32(sampleRate);
af_fwrite(&sampleRate, 4, 1, file->fh);
averageBytesPerSecond =
track->f.sampleRate * _af_format_frame_size(&track->f, AF_FALSE);
averageBytesPerSecond = HOST_TO_LENDIAN_INT32(averageBytesPerSecond);
af_fwrite(&averageBytesPerSecond, 4, 1, file->fh);
blockAlign = _af_format_frame_size(&track->f, AF_FALSE);
blockAlign = HOST_TO_LENDIAN_INT16(blockAlign);
af_fwrite(&blockAlign, 2, 1, file->fh);
bitsPerSample = HOST_TO_LENDIAN_INT16(bitsPerSample);
af_fwrite(&bitsPerSample, 2, 1, file->fh);
/*
If the data is compressed we have additional
format-specific information to write as well as the
'fact' (frame count) chunk.
*/
if (track->f.compressionType != AF_COMPRESSION_NONE)
{
u_int32_t factSize = 4;
u_int32_t totalFrameCount = 0;
if (track->f.compressionType == AF_COMPRESSION_G711_ULAW ||
track->f.compressionType == AF_COMPRESSION_G711_ALAW)
{
u_int16_t zero = 0;
af_fwrite(&zero, 2, 1, file->fh);
}
af_fwrite("fact", 4, 1, file->fh);
factSize = HOST_TO_LENDIAN_INT32(factSize);
af_fwrite(&factSize, 4, 1, file->fh);
waveinfo->fileSizeOffset = af_ftell(file->fh);
totalFrameCount = HOST_TO_LENDIAN_INT32(totalFrameCount);
af_fwrite(&totalFrameCount, 4, 1, file->fh);
}
return AF_SUCCEED;
}
