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_wave_write_init (AFfilesetup setup, AFfilehandle filehandle)
{
uint32_t zero = 0;
if (_af_filesetup_make_handle(setup, filehandle) == AF_FAIL)
return AF_FAIL;
filehandle->formatSpecific = waveinfo_new();
af_fseek(filehandle->fh, 0, SEEK_SET);
af_fwrite("RIFF", 4, 1, filehandle->fh);
af_fwrite(&zero, 4, 1, filehandle->fh);
af_fwrite("WAVE", 4, 1, filehandle->fh);
WriteMiscellaneous(filehandle);
WriteCues(filehandle);
WriteFormat(filehandle);
WriteFrameCount(filehandle);
WriteData(filehandle);
return AF_SUCCEED;
}
