static PyObject *Snd_GetCompressionInfo(PyObject *_self, PyObject *_args)
{
PyObject *_res = NULL;
OSErr _err;
short compressionID;
OSType format;
short numChannels;
short sampleSize;
CompressionInfo cp__out__;
if (!PyArg_ParseTuple(_args, "hO&hh",
&compressionID,
PyMac_GetOSType, &format,
&numChannels,
&sampleSize))
return NULL;
_err = GetCompressionInfo(compressionID,
format,
numChannels,
sampleSize,
&cp__out__);
if (_err != noErr) return PyMac_Error(_err);
_res = Py_BuildValue("s#",
(char *)&cp__out__, (int)sizeof(CompressionInfo));
return _res;
}
void SMACscom::GetInfo(SoundSource inSourceID, OSType inSelector, void* outData)
{
switch(inSelector)
{
case siCompressionFactor:
GetCompressionInfo(*static_cast<CompressionInfo*>(outData));
break;
case siCompressionParams:
GetCompressionParams(outData);
break;
default:
ThrowIf(mSourceComponent == NULL, siUnknownInfoType, "SMACscom::GetInfo: no source to pass request to")
ComponentResult theError = SoundComponentGetInfo(mSourceComponent, inSourceID, inSelector, outData);
ThrowIfError(theError, (CAException)theError, "SMACscom::GetInfo: got an error from SoundComponentGetInfo");
break;
};
}
void TLevelWriter3gp::saveSoundTrack(TSoundTrack *st)
{
Track theTrack;
OSErr myErr = noErr;
SoundDescriptionV1Handle mySampleDesc;
Media myMedia;
Handle myDestHandle;
SoundComponentData sourceInfo;
SoundComponentData destInfo;
SoundConverter converter;
CompressionInfo compressionInfo;
int err;
if (!st)
throw TException("null reference to soundtrack");
if (st->getBitPerSample() != 16) {
throw TImageException(m_path, "Only 16 bits per sample is supported");
}
theTrack = NewMovieTrack(m_movie, 0, 0, kFullVolume);
myErr = GetMoviesError();
if (myErr != noErr)
throw TImageException(m_path, "error creating audio track");
FailIf(myErr != noErr, CompressErr);
myDestHandle = NewHandle(0);
FailWithAction(myDestHandle == NULL, myErr = MemError(), NoDest);
*myDestHandle = (char *)st->getRawData();
//////////
//
// create a media for the track passed in
//
//////////
// set new track to be a sound track
m_soundDataRef = nil;
m_hSoundMovieData = NewHandle(0);
// Construct the Handle data reference
err = PtrToHand(&m_hSoundMovieData, &m_soundDataRef, sizeof(Handle));
if ((err = GetMoviesError() != noErr))
throw TImageException(getFilePath(), "can't create Data Ref");
myMedia = NewTrackMedia(theTrack, SoundMediaType, st->getSampleRate(), m_soundDataRef, HandleDataHandlerSubType); //track->rate >> 16
myErr = GetMoviesError();
if (myErr != noErr)
throw TImageException(m_path, "error setting audio track");
FailIf(myErr != noErr, Exit);
// start a media editing session
myErr = BeginMediaEdits(myMedia);
if (myErr != noErr)
throw TImageException(m_path, "error beginning edit audio track");
FailIf(myErr != noErr, Exit);
sourceInfo.flags = 0x0;
sourceInfo.format = kSoundNotCompressed;
sourceInfo.numChannels = st->getChannelCount();
sourceInfo.sampleSize = st->getBitPerSample();
sourceInfo.sampleRate = st->getSampleRate();
sourceInfo.sampleCount = st->getSampleCount();
sourceInfo.buffer = (unsigned char *)st->getRawData();
sourceInfo.reserved = 0x0;
destInfo.flags = kNoSampleRateConversion | kNoSampleSizeConversion |
kNoSampleFormatConversion | kNoChannelConversion |
kNoDecompression | kNoVolumeConversion |
kNoRealtimeProcessing;
destInfo.format = k16BitNativeEndianFormat;
destInfo.numChannels = st->getChannelCount();
destInfo.sampleSize = st->getBitPerSample();
destInfo.sampleRate = st->getSampleRate();
destInfo.sampleCount = st->getSampleCount();
destInfo.buffer = (unsigned char *)st->getRawData();
destInfo.reserved = 0x0;
SoundConverterOpen(&sourceInfo, &destInfo, &converter);
myErr = SoundConverterGetInfo(converter, siCompressionFactor, &compressionInfo);
if (myErr != noErr)
throw TImageException(m_path, "error getting audio converter info");
myErr = GetCompressionInfo(fixedCompression, sourceInfo.format, sourceInfo.numChannels, sourceInfo.sampleSize, &compressionInfo);
if (myErr != noErr)
throw TImageException(m_path, "error getting audio compression info");
FailIf(myErr != noErr, ConverterErr);
compressionInfo.bytesPerFrame = compressionInfo.bytesPerPacket * destInfo.numChannels;
//////////
//
// create a sound sample description
//
//////////
// use the SoundDescription format 1 because it adds fields for data size information
// and is required by AddSoundDescriptionExtension if an extension is required for the compression format
mySampleDesc = (SoundDescriptionV1Handle)NewHandleClear(sizeof(SoundDescriptionV1));
FailWithAction(myErr != noErr, myErr = MemError(), Exit);
(**mySampleDesc).desc.descSize = sizeof(SoundDescriptionV1);
(**mySampleDesc).desc.dataFormat = destInfo.format;
(**mySampleDesc).desc.resvd1 = 0;
(**mySampleDesc).desc.resvd2 = 0;
(**mySampleDesc).desc.dataRefIndex = 1;
(**mySampleDesc).desc.version = 1;
(**mySampleDesc).desc.revlevel = 0;
(**mySampleDesc).desc.vendor = 0;
(**mySampleDesc).desc.numChannels = destInfo.numChannels;
(**mySampleDesc).desc.sampleSize = destInfo.sampleSize;
(**mySampleDesc).desc.compressionID = 0;
(**mySampleDesc).desc.packetSize = 0;
(**mySampleDesc).desc.sampleRate = st->getSampleRate() << 16;
(**mySampleDesc).samplesPerPacket = compressionInfo.samplesPerPacket;
(**mySampleDesc).bytesPerPacket = compressionInfo.bytesPerPacket;
(**mySampleDesc).bytesPerFrame = compressionInfo.bytesPerFrame;
(**mySampleDesc).bytesPerSample = compressionInfo.bytesPerSample;
//////////
//
// add samples to the media
//
//////////
myErr = AddMediaSample(myMedia, myDestHandle,
0,
destInfo.sampleCount * compressionInfo.bytesPerFrame,
1,
(SampleDescriptionHandle)mySampleDesc,
destInfo.sampleCount * compressionInfo.samplesPerPacket,
0,
NULL);
if (myErr != noErr)
throw TImageException(m_path, "error adding audio samples");
FailIf(myErr != noErr, MediaErr);
myErr = EndMediaEdits(myMedia);
if (myErr != noErr)
throw TImageException(m_path, "error ending audio edit");
FailIf(myErr != noErr, MediaErr);
//////////
//
// insert the media into the track
//
//////////
myErr = InsertMediaIntoTrack(theTrack, 0, 0, GetMediaDuration(myMedia), fixed1);
if (myErr != noErr)
throw TImageException(m_path, "error inserting audio track");
FailIf(myErr != noErr, MediaErr);
goto Done;
ConverterErr:
NoDest:
CompressErr:
Exit:
Done:
MediaErr:
if (mySampleDesc != NULL)
DisposeHandle((Handle)mySampleDesc);
if (converter)
SoundConverterClose(converter);
if (myErr != noErr)
throw TImageException(m_path, "error saving audio track");
}
