float _af_format_frame_size (const AudioFormat *fmt, bool stretch3to4)
{
const CompressionUnit *unit = _af_compression_unit_from_id(fmt->compressionType);
float squishFactor = unit->squishFactor;
return _af_format_frame_size_uncompressed(fmt, stretch3to4) /
squishFactor;
}
void _af_print_audioformat (AudioFormat *fmt)
{
/* sampleRate, channelCount */
printf("{ %7.2f Hz %d ch ", fmt->sampleRate, fmt->channelCount);
/* sampleFormat, sampleWidth */
switch (fmt->sampleFormat)
{
case AF_SAMPFMT_TWOSCOMP:
printf("%db 2 ", fmt->sampleWidth);
break;
case AF_SAMPFMT_UNSIGNED:
printf("%db u ", fmt->sampleWidth);
break;
case AF_SAMPFMT_FLOAT:
printf("flt ");
break;
case AF_SAMPFMT_DOUBLE:
printf("dbl ");
break;
default:
printf("%dsampfmt? ", fmt->sampleFormat);
}
/* pcm */
printf("(%.30g+-%.30g [%.30g,%.30g]) ",
fmt->pcm.intercept, fmt->pcm.slope,
fmt->pcm.minClip, fmt->pcm.maxClip);
/* byteOrder */
switch (fmt->byteOrder)
{
case AF_BYTEORDER_BIGENDIAN:
printf("big ");
break;
case AF_BYTEORDER_LITTLEENDIAN:
printf("little ");
break;
default:
printf("%dbyteorder? ", fmt->byteOrder);
break;
}
/* compression */
{
const CompressionUnit *unit = _af_compression_unit_from_id(fmt->compressionType);
if (!unit)
printf("%dcompression?", fmt->compressionType);
else if (fmt->compressionType == AF_COMPRESSION_NONE)
printf("pcm");
else
printf("%s", unit->label);
}
printf(" }");
}
status ModuleState::initFileModule(AFfilehandle file, Track *track)
{
const CompressionUnit *unit = _af_compression_unit_from_id(track->f.compressionType);
if (!unit)
return AF_FAIL;
// Validate compression format and parameters.
if (!unit->fmtok(&track->f))
return AF_FAIL;
if (file->m_seekok &&
file->m_fh->seek(track->fpos_first_frame, File::SeekFromBeginning) !=
track->fpos_first_frame)
{
_af_error(AF_BAD_LSEEK, "unable to position file handle at beginning of sound data");
return AF_FAIL;
}
AFframecount chunkFrames;
if (file->m_access == _AF_READ_ACCESS)
m_fileModule = unit->initdecompress(track, file->m_fh, file->m_seekok,
file->m_fileFormat == AF_FILE_RAWDATA, &chunkFrames);
else
m_fileModule = unit->initcompress(track, file->m_fh, file->m_seekok,
file->m_fileFormat == AF_FILE_RAWDATA, &chunkFrames);
if (unit->needsRebuffer)
{
assert(unit->nativeSampleFormat == AF_SAMPFMT_TWOSCOMP);
RebufferModule::Direction direction =
file->m_access == _AF_WRITE_ACCESS ?
RebufferModule::VariableToFixed : RebufferModule::FixedToVariable;
m_fileRebufferModule = new RebufferModule(direction,
track->f.bytesPerFrame(false), chunkFrames,
unit->multiple_of);
}
track->filemodhappy = true;
return AF_SUCCEED;
}
/* ARGSUSED0 */
AUpvlist _afQueryCompression (int arg1, int arg2, int arg3, int arg4)
{
const CompressionUnit *unit = NULL;
switch (arg1)
{
case AF_QUERY_ID_COUNT:
{
int count = 0;
for (int i = 0; i < _AF_NUM_COMPRESSION; i++)
if (_af_compression[i].implemented)
count++;
return _af_pv_long(count);
}
case AF_QUERY_IDS:
{
int *buf = (int *) _af_calloc(_AF_NUM_COMPRESSION, sizeof (int));
if (!buf)
return AU_NULL_PVLIST;
int count = 0;
for (int i = 0; i < _AF_NUM_COMPRESSION; i++)
{
if (_af_compression[i].implemented)
buf[count++] = _af_compression[i].compressionID;
}
return _af_pv_pointer(buf);
}
case AF_QUERY_IMPLEMENTED:
unit = _af_compression_unit_from_id(arg2);
if (!unit)
return _af_pv_long(0);
return _af_pv_long(unit->implemented);
case AF_QUERY_NATIVE_SAMPFMT:
unit = _af_compression_unit_from_id(arg2);
if (!unit)
return AU_NULL_PVLIST;
return _af_pv_long(unit->nativeSampleFormat);
case AF_QUERY_NATIVE_SAMPWIDTH:
unit = _af_compression_unit_from_id(arg2);
if (!unit)
return AU_NULL_PVLIST;
return _af_pv_long(unit->nativeSampleWidth);
case AF_QUERY_LABEL:
unit = _af_compression_unit_from_id(arg2);
if (!unit)
return AU_NULL_PVLIST;
return _af_pv_pointer(const_cast<char *>(unit->label));
case AF_QUERY_NAME:
unit = _af_compression_unit_from_id(arg2);
if (!unit)
return AU_NULL_PVLIST;
return _af_pv_pointer(const_cast<char *>(unit->shortname));
case AF_QUERY_DESC:
unit = _af_compression_unit_from_id(arg2);
if (!unit)
return AU_NULL_PVLIST;
return _af_pv_pointer(const_cast<char *>(unit->name));
}
_af_error(AF_BAD_QUERY, "unrecognized query selector %d\n", arg1);
return AU_NULL_PVLIST;
}
