static status WriteCues (AFfilehandle file)
{
int i, *markids, markCount;
uint32_t numCues, cueChunkSize, listChunkSize;
_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;
af_write_uint32_le(&cueChunkSize, file->fh);
numCues = markCount;
af_write_uint32_le(&numCues, 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++)
{
uint32_t identifier, position, chunkStart, blockStart;
uint32_t sampleOffset;
AFframecount markposition;
identifier = markids[i];
af_write_uint32_le(&identifier, file->fh);
position = i;
af_write_uint32_le(&position, 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 (uint32_t), 1, file->fh);
blockStart = 0;
af_fwrite(&blockStart, sizeof (uint32_t), 1, file->fh);
markposition = afGetMarkPosition(file, AF_DEFAULT_TRACK, markids[i]);
/* Sample offsets are stored in the WAVE file as frames. */
sampleOffset = markposition;
af_write_uint32_le(&sampleOffset, 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);
af_write_uint32_le(&listChunkSize, file->fh);
af_fwrite("adtl", 4, 1, file->fh);
for (i=0; i<markCount; i++)
{
const char *name;
uint32_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);
cuePointID = markids[i];
af_fwrite("labl", 4, 1, file->fh);
af_write_uint32_le(&labelSize, file->fh);
af_write_uint32_le(&cuePointID, 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)
{
uint8_t zero=0;
af_write_uint8(&zero, file->fh);
}
}
free(markids);
return AF_SUCCEED;
}
status WAVEFile::writeCues()
{
int *markids, markCount;
uint32_t numCues, cueChunkSize, listChunkSize;
markCount = afGetMarkIDs(this, AF_DEFAULT_TRACK, NULL);
if (markCount == 0)
return AF_SUCCEED;
if (markOffset == 0)
markOffset = fh->tell();
else
fh->seek(markOffset, File::SeekFromBeginning);
fh->write("cue ", 4);
/*
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;
writeU32(&cueChunkSize);
numCues = markCount;
writeU32(&numCues);
markids = (int *) _af_calloc(markCount, sizeof (int));
assert(markids != NULL);
afGetMarkIDs(this, AF_DEFAULT_TRACK, markids);
/* Write each marker to the file. */
for (int i=0; i < markCount; i++)
{
uint32_t identifier, position, chunkStart, blockStart;
uint32_t sampleOffset;
AFframecount markposition;
identifier = markids[i];
writeU32(&identifier);
position = i;
writeU32(&position);
/* For now the RIFF id is always the first data chunk. */
fh->write("data", 4);
/*
For an uncompressed WAVE file which contains
only one data chunk, chunkStart and blockStart
are zero.
*/
chunkStart = 0;
fh->write(&chunkStart, sizeof (uint32_t));
blockStart = 0;
fh->write(&blockStart, sizeof (uint32_t));
markposition = afGetMarkPosition(this, AF_DEFAULT_TRACK, markids[i]);
/* Sample offsets are stored in the WAVE file as frames. */
sampleOffset = markposition;
writeU32(&sampleOffset);
}
/*
Now write the cue names which is in a master list chunk
with a subchunk for each cue's name.
*/
listChunkSize = 4;
for (int i=0; i<markCount; i++)
{
const char *name;
name = afGetMarkName(this, 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);
}
fh->write("LIST", 4);
writeU32(&listChunkSize);
fh->write("adtl", 4);
for (int i=0; i<markCount; i++)
{
const char *name;
uint32_t labelSize, cuePointID;
name = afGetMarkName(this, AF_DEFAULT_TRACK, markids[i]);
/* Make labelSize even if it is not already. */
labelSize = 4+(strlen(name)+1) + ((strlen(name) + 1) % 2);
cuePointID = markids[i];
fh->write("labl", 4);
writeU32(&labelSize);
writeU32(&cuePointID);
fh->write(name, strlen(name) + 1);
/*
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)
{
uint8_t zero=0;
writeU8(&zero);
}
}
free(markids);
return AF_SUCCEED;
}
int testmarkers (int fileformat)
{
AFfilehandle file;
AFfilesetup setup;
int markids[] = {1, 2, 3, 4};
AFframecount markpositions[] = {14, 54, 23, 101};
const char *marknames[] = {"one", "two", "three", "four"};
short frames[FRAME_COUNT * 2] = {0};
int readmarkcount;
int readmarkids[4];
AFframecount frameswritten;
setup = afNewFileSetup();
ensure(setup != AF_NULL_FILESETUP, "Could not create file setup");
afInitFileFormat(setup, fileformat);
afInitChannels(setup, AF_DEFAULT_TRACK, 2);
afInitMarkIDs(setup, AF_DEFAULT_TRACK, markids, 4);
afInitMarkName(setup, AF_DEFAULT_TRACK, markids[0], marknames[0]);
afInitMarkName(setup, AF_DEFAULT_TRACK, markids[1], marknames[1]);
afInitMarkName(setup, AF_DEFAULT_TRACK, markids[2], marknames[2]);
afInitMarkName(setup, AF_DEFAULT_TRACK, markids[3], marknames[3]);
file = afOpenFile(sTestFileName, "w", setup);
ensure(file != AF_NULL_FILEHANDLE, "Could not open file for writing");
afFreeFileSetup(setup);
frameswritten = afWriteFrames(file, AF_DEFAULT_TRACK, frames, FRAME_COUNT);
ensure(frameswritten == FRAME_COUNT, "Error writing audio data");
afSetMarkPosition(file, AF_DEFAULT_TRACK, markids[0], markpositions[0]);
afSetMarkPosition(file, AF_DEFAULT_TRACK, markids[1], markpositions[1]);
afSetMarkPosition(file, AF_DEFAULT_TRACK, markids[2], markpositions[2]);
afSetMarkPosition(file, AF_DEFAULT_TRACK, markids[3], markpositions[3]);
afCloseFile(file);
file = afOpenFile(sTestFileName, "r", NULL);
ensure(file != AF_NULL_FILEHANDLE, "Could not open file for reading");
readmarkcount = afGetMarkIDs(file, AF_DEFAULT_TRACK, NULL);
ensure(readmarkcount == 4, "Number of markers is not correct");
afGetMarkIDs(file, AF_DEFAULT_TRACK, readmarkids);
for (int i=0; i<readmarkcount; i++)
ensure(readmarkids[i] = markids[i],
"Marker identification numbers do not match");
for (int i=0; i<readmarkcount; i++)
{
AFframecount readmarkposition;
const char *readmarkname;
readmarkposition = afGetMarkPosition(file, AF_DEFAULT_TRACK, readmarkids[i]);
readmarkname = afGetMarkName(file, AF_DEFAULT_TRACK, readmarkids[i]);
ensure(readmarkposition == markpositions[i],
"Marker positions do not match");
ensure(strcmp(readmarkname, marknames[i]) == 0,
"Marker names do not match");
}
afCloseFile(file);
return EXIT_SUCCESS;
}