static status WriteFrameCount (AFfilehandle file)
{
_Track *track = NULL;
_WAVEInfo *waveinfo = NULL;
u_int32_t factSize = 4;
u_int32_t totalFrameCount;
assert(file != NULL);
track = _af_filehandle_get_track(file, AF_DEFAULT_TRACK);
waveinfo = (_WAVEInfo *) file->formatSpecific;
/* We only write the fact chunk for compressed audio. */
if (track->f.compressionType == AF_COMPRESSION_NONE)
return AF_SUCCEED;
/*
If the offset for the fact chunk hasn't been set yet,
set it to the file's current position.
*/
if (waveinfo->factOffset == 0)
waveinfo->factOffset = af_ftell(file->fh);
else
af_fseek(file->fh, waveinfo->factOffset, SEEK_SET);
af_fwrite("fact", 4, 1, file->fh);
factSize = HOST_TO_LENDIAN_INT32(factSize);
af_fwrite(&factSize, 4, 1, file->fh);
totalFrameCount = HOST_TO_LENDIAN_INT32(track->totalfframes);
af_fwrite(&totalFrameCount, 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;
}
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;
}
status af_write_uint32_le (const uint32_t *value, AFvirtualfile *vf)
{
uint32_t v;
v = HOST_TO_LENDIAN_INT32(*value);
if (af_fwrite(&v, sizeof (v), 1, vf) != 1)
return AF_FAIL;
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;
}
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;
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)
{
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, AF_FALSE);
bitsPerSample = 8 * _af_format_sample_size(&track->f, AF_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;
}
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 (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);
}
return AF_SUCCEED;
}
static status WriteCues (AFfilehandle file)
{
int i, *markids, markCount;
u_int32_t numCues, cueChunkSize, listChunkSize;
_Track *track = &file->tracks[0];
_WAVEInfo *wave;
assert(file);
markCount = afGetMarkIDs(file, AF_DEFAULT_TRACK, NULL);
if (markCount == 0)
return AF_SUCCEED;
wave = file->formatSpecific;
if (wave->markOffset == 0)
wave->markOffset = af_ftell(file->fh);
else
af_fseek(file->fh, wave->markOffset, SEEK_SET);
af_fwrite("cue ", 4, 1, file->fh);
/*
The cue chunk consists of 4 bytes for the number of cue points
followed by 24 bytes for each cue point record.
*/
cueChunkSize = 4 + markCount * 24;
cueChunkSize = HOST_TO_LENDIAN_INT32(cueChunkSize);
af_fwrite(&cueChunkSize, sizeof (u_int32_t), 1, file->fh);
numCues = HOST_TO_LENDIAN_INT32(markCount);
af_fwrite(&numCues, sizeof (u_int32_t), 1, file->fh);
markids = _af_calloc(markCount, sizeof (int));
assert(markids != NULL);
afGetMarkIDs(file, AF_DEFAULT_TRACK, markids);
/* Write each marker to the file. */
for (i=0; i < markCount; i++)
{
u_int32_t identifier, position, chunkStart, blockStart;
u_int32_t sampleOffset;
AFframecount markposition;
identifier = HOST_TO_LENDIAN_INT32(markids[i]);
af_fwrite(&identifier, sizeof (u_int32_t), 1, file->fh);
position = HOST_TO_LENDIAN_INT32(i);
af_fwrite(&position, sizeof (u_int32_t), 1, file->fh);
/* For now the RIFF id is always the first data chunk. */
af_fwrite("data", 4, 1, file->fh);
/*
For an uncompressed WAVE file which contains
only one data chunk, chunkStart and blockStart
are zero.
*/
chunkStart = 0;
af_fwrite(&chunkStart, sizeof (u_int32_t), 1, file->fh);
blockStart = 0;
af_fwrite(&blockStart, sizeof (u_int32_t), 1, file->fh);
markposition = afGetMarkPosition(file, AF_DEFAULT_TRACK, markids[i]);
/* Sample offsets are stored in the WAVE file as frames. */
sampleOffset = HOST_TO_LENDIAN_INT32(markposition);
af_fwrite(&sampleOffset, sizeof (u_int32_t), 1, file->fh);
}
/*
Now write the cue names which is in a master list chunk
with a subchunk for each cue's name.
*/
listChunkSize = 4;
for (i=0; i<markCount; i++)
{
const char *name;
name = afGetMarkName(file, AF_DEFAULT_TRACK, markids[i]);
/*
Each label chunk consists of 4 bytes for the
"labl" chunk ID, 4 bytes for the chunk data
size, 4 bytes for the cue point ID, and then
the length of the label as a Pascal-style string.
In all, this is 12 bytes plus the length of the
string, its size byte, and a trailing pad byte
if the length of the chunk is otherwise odd.
*/
listChunkSize += 12 + (strlen(name) + 1) +
((strlen(name) + 1) % 2);
}
af_fwrite("LIST", 4, 1, file->fh);
listChunkSize = HOST_TO_LENDIAN_INT32(listChunkSize);
af_fwrite(&listChunkSize, sizeof (u_int32_t), 1, file->fh);
af_fwrite("adtl", 4, 1, file->fh);
for (i=0; i<markCount; i++)
{
const char *name;
u_int32_t labelSize, cuePointID;
name = afGetMarkName(file, AF_DEFAULT_TRACK, markids[i]);
/* Make labelSize even if it is not already. */
labelSize = 4+(strlen(name)+1) + ((strlen(name) + 1) % 2);
labelSize = HOST_TO_LENDIAN_INT32(labelSize);
cuePointID = HOST_TO_LENDIAN_INT32(markids[i]);
af_fwrite("labl", 4, 1, file->fh);
af_fwrite(&labelSize, 4, 1, file->fh);
af_fwrite(&cuePointID, 4, 1, file->fh);
af_fwrite(name, strlen(name) + 1, 1, file->fh);
/*
If the name plus the size byte comprises an odd
length, add another byte to make the string an
even length.
*/
if (((strlen(name) + 1) % 2) != 0)
{
u_int8_t c=0;
af_fwrite(&c, 1, 1, file->fh);
}
}
free(markids);
return AF_SUCCEED;
}
status WriteMiscellaneous (AFfilehandle filehandle)
{
_WAVEInfo *wave = (_WAVEInfo *) filehandle->formatSpecific;
if (filehandle->miscellaneousCount != 0)
{
int i;
u_int32_t miscellaneousBytes;
u_int32_t chunkSize;
/* Start at 12 to account for 'LIST', size, and 'INFO'. */
miscellaneousBytes = 12;
/* Then calculate the size of the whole INFO chunk. */
for (i=0; i<filehandle->miscellaneousCount; i++)
{
u_int32_t miscid;
/* Skip miscellaneous data of an unsupported type. */
if (misc_type_to_wave(filehandle->miscellaneous[i].type,
&miscid) == AF_FAIL)
continue;
/* Account for miscellaneous type and size. */
miscellaneousBytes += 8;
miscellaneousBytes += filehandle->miscellaneous[i].size;
/* Add a pad byte if necessary. */
if (filehandle->miscellaneous[i].size % 2 != 0)
miscellaneousBytes++;
assert(miscellaneousBytes % 2 == 0);
}
if (wave->miscellaneousStartOffset == 0)
wave->miscellaneousStartOffset = af_ftell(filehandle->fh);
else
af_fseek(filehandle->fh, wave->miscellaneousStartOffset, SEEK_SET);
wave->totalMiscellaneousSize = miscellaneousBytes;
/*
Write the data. On the first call to this
function (from _af_wave_write_init), the
data won't be available, af_fseek is used to
reserve space until the data has been provided.
On subseuent calls to this function (from
_af_wave_update), the data will really be written.
*/
/* Write 'LIST'. */
af_fwrite("LIST", 4, 1, filehandle->fh);
/* Write the size of the following chunk. */
chunkSize = miscellaneousBytes-8;
chunkSize = HOST_TO_LENDIAN_INT32(chunkSize);
af_fwrite(&chunkSize, sizeof (u_int32_t), 1, filehandle->fh);
/* Write 'INFO'. */
af_fwrite("INFO", 4, 1, filehandle->fh);
/* Write each miscellaneous chunk. */
for (i=0; i<filehandle->miscellaneousCount; i++)
{
u_int32_t miscsize = HOST_TO_LENDIAN_INT32(filehandle->miscellaneous[i].size);
u_int32_t miscid = 0;
/* Skip miscellaneous data of an unsupported type. */
if (misc_type_to_wave(filehandle->miscellaneous[i].type,
&miscid) == AF_FAIL)
continue;
af_fwrite(&miscid, 4, 1, filehandle->fh);
af_fwrite(&miscsize, 4, 1, filehandle->fh);
if (filehandle->miscellaneous[i].buffer != NULL)
{
u_int8_t zero = 0;
af_fwrite(filehandle->miscellaneous[i].buffer, filehandle->miscellaneous[i].size, 1, filehandle->fh);
/* Pad if necessary. */
if ((filehandle->miscellaneous[i].size%2) != 0)
af_fwrite(&zero, 1, 1, filehandle->fh);
}
else
{
int size;
size = filehandle->miscellaneous[i].size;
/* Pad if necessary. */
if ((size % 2) != 0)
size++;
af_fseek(filehandle->fh, size, SEEK_CUR);
}
}
}
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;
}
