OSStatus AudioConverter::create(const AudioStreamBasicDescription* inSourceFormat, const AudioStreamBasicDescription* inDestinationFormat, AudioConverter** out)
{
TRACE2(inSourceFormat, inDestinationFormat);
// TODO: non-interleaved audio
AVCodec *codecIn, *codecOut;
AVCodecContext *cIn;
AVCodecContext *cOut;
enum AVCodecID idIn, idOut;
*out = nullptr;
idIn = CACodecToAV(inSourceFormat);
idOut = CACodecToAV(inDestinationFormat);
if (idIn == AV_CODEC_ID_NONE || idOut == AV_CODEC_ID_NONE)
{
LOG << "AudioConverter::create(): Unsupported codec, format in = " << std::hex << inSourceFormat->mFormatID << ", out = " << inDestinationFormat->mFormatID << std::dec << std::endl;
return paramErr;
}
codecIn = avcodec_find_decoder(idIn);
codecOut = avcodec_find_encoder(idOut);
if (!codecIn || !codecOut)
{
LOG << "AudioConverter::create(): avcodec_find_*() failed, format in = " << std::hex << inSourceFormat->mFormatID << ", out = " << inDestinationFormat->mFormatID << std::dec << std::endl;
return paramErr;
}
*out = new AudioConverter(inSourceFormat, inDestinationFormat);
(*out)->m_decoder = cIn = avcodec_alloc_context3(codecIn);
if (inSourceFormat->mFormatID == kAudioFormatLinearPCM)
{
cIn->channels = inSourceFormat->mChannelsPerFrame;
cIn->sample_rate = inSourceFormat->mSampleRate;
LOG << "Converting from PCM with " << cIn->channels << " channels at " << cIn->sample_rate << " Hz\n";
}
if (avcodec_open2((*out)->m_decoder, codecIn, nullptr) < 0)
{
delete *out;
LOG << "AudioConverter::create(): avcodec_open() failed, format in = " << std::hex << inSourceFormat->mFormatID << ", out = " << inDestinationFormat->mFormatID << std::dec << std::endl;
return paramErr;
}
// The encoder will be initialized after we process the first packet
(*out)->m_encoder = cOut = avcodec_alloc_context3(codecOut);
(*out)->m_codecIn = codecIn;
(*out)->m_codecOut = codecOut;
return noErr;
}
OSStatus AudioConverter::create(const AudioStreamBasicDescription* inSourceFormat, const AudioStreamBasicDescription* inDestinationFormat, AudioConverter** out)
{
AVCodec *codecIn, *codecOut;
enum AVCodecID idIn, idOut;
*out = nullptr;
idIn = CACodecToAV(inSourceFormat);
idOut = CACodecToAV(inDestinationFormat);
if (idIn == AV_CODEC_ID_NONE || idOut == AV_CODEC_ID_NONE)
{
LOG << "AudioConverter::create(): Unsupported codec, format in = " << std::hex << inSourceFormat->mFormatID << ", out = " << inDestinationFormat->mFormatID << std::dec << std::endl;
return paramErr;
}
codecIn = avcodec_find_decoder(idIn);
codecOut = avcodec_find_encoder(idOut);
if (!codecIn || !codecOut)
{
LOG << "AudioConverter::create(): avcodec_find_*() failed, format in = " << std::hex << inSourceFormat->mFormatID << ", out = " << inDestinationFormat->mFormatID << std::dec << std::endl;
return paramErr;
}
*out = new AudioConverter(inSourceFormat, inDestinationFormat);
(*out)->m_decoder = avcodec_alloc_context3(codecIn);
if (avcodec_open2((*out)->m_decoder, codecIn, nullptr) < 0)
{
delete *out;
LOG << "AudioConverter::create(): avcodec_open() failed, format in = " << std::hex << inSourceFormat->mFormatID << ", out = " << inDestinationFormat->mFormatID << std::dec << std::endl;
return paramErr;
}
// The encoder will be initialized after we process the first packet
(*out)->m_encoder = avcodec_alloc_context3(codecOut);
return noErr;
}
