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"); }