AudioFile::SampleType AudioFileReaderInternal::getSampleType() const throw()
{
const AudioFile::Encoding encoding = getEncoding();
const int bytesPerSample = getBytesPerSample();
const bool isPCM = encoding & AudioFile::EncodingFlagPCM;
const bool isFloat = encoding & AudioFile::EncodingFlagFloat;
if (isPCM)
{
switch (bytesPerSample)
{
case 2: return AudioFile::Short;
case 3: return AudioFile::Int24;
case 4: return AudioFile::Int;
case 1: return AudioFile::Char;
default: goto exit;
}
}
else if (isFloat)
{
switch (bytesPerSample)
{
case 4: return AudioFile::Float;
case 8: return AudioFile::Double;
default: goto exit;
}
}
exit:
return AudioFile::Invalid;
}
void AudioDecoderThread::planarToInterleaved(char* pOutput, AVFrame* pInputFrame, int numChannels,
int numSamples)
{
AVG_ASSERT(numChannels <= 8);
if (numSamples == 0) {
// Fishy, some ogg files have no proper frame_size set. But outputBufferSamples
// worked for sample ogg file.
numSamples = m_AP.m_OutputBufferSamples;
}
int i, j;
int bytesPerSample = getBytesPerSample(m_InputSampleFormat);
char * pPlanes[8] = {};
for (i=0; i<numChannels; i++) {
pPlanes[i] = (char*)(pInputFrame->data[i]);
}
for (i=0; i<numSamples; i++) {
for (j=0; j<numChannels; j++) {
memcpy(pOutput, pPlanes[j], bytesPerSample);
pOutput += bytesPerSample;
pPlanes[j] += bytesPerSample;
}
}
}
void AudioDecoderThread::decodePacket(AVPacket* pPacket)
{
char* pDecodedData = 0;
AVPacket* pTempPacket = new AVPacket;
av_init_packet(pTempPacket);
pTempPacket->data = pPacket->data;
pTempPacket->size = pPacket->size;
AVFrame* pDecodedFrame;
pDecodedFrame = avcodec_alloc_frame();
while (pTempPacket->size > 0) {
int gotFrame = 0;
int bytesDecoded;
int bytesConsumed = avcodec_decode_audio4(m_pStream->codec, pDecodedFrame,
&gotFrame, pTempPacket);
if (gotFrame) {
bytesDecoded = av_samples_get_buffer_size(0, m_pStream->codec->channels,
pDecodedFrame->nb_samples, m_pStream->codec->sample_fmt, 1);
pDecodedData = (char*)(pDecodedFrame->data[0]);
} else {
bytesDecoded = 0;
}
// This is triggered for some strange/broken videos.
// AVG_ASSERT(bytesConsumed != 0);
if (bytesConsumed < 0) {
// Error decoding -> throw away current packet.
bytesDecoded = 0;
pTempPacket->size = 0;
} else {
pTempPacket->data += bytesConsumed;
pTempPacket->size -= bytesConsumed;
}
if (bytesDecoded > 0) {
int framesDecoded = bytesDecoded/(m_pStream->codec->channels*
getBytesPerSample(m_InputSampleFormat));
AudioBufferPtr pBuffer;
bool bNeedsResample = (m_InputSampleRate != m_AP.m_SampleRate ||
m_InputSampleFormat != AV_SAMPLE_FMT_S16 ||
m_pStream->codec->channels != m_AP.m_Channels);
bool bIsPlanar = false;
#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(51, 27, 0)
bIsPlanar = av_sample_fmt_is_planar((AVSampleFormat)m_InputSampleFormat);
if (bIsPlanar) {
char* pPackedData = (char*)av_malloc(AVCODEC_MAX_AUDIO_FRAME_SIZE +
FF_INPUT_BUFFER_PADDING_SIZE);
planarToInterleaved(pPackedData, pDecodedFrame, m_pStream->codec->channels,
framesDecoded);
pBuffer = resampleAudio(pPackedData, framesDecoded,
av_get_packed_sample_fmt((AVSampleFormat)m_InputSampleFormat));
av_free(pPackedData);
bNeedsResample = false;
}
#endif
if (bNeedsResample) {
pBuffer = resampleAudio(pDecodedData, framesDecoded,
m_InputSampleFormat);
} else if (!bIsPlanar) {
pBuffer = AudioBufferPtr(new AudioBuffer(framesDecoded, m_AP));
memcpy(pBuffer->getData(), pDecodedData, bytesDecoded);
}
m_LastFrameTime += float(pBuffer->getNumFrames())/m_AP.m_SampleRate;
pushAudioMsg(pBuffer, m_LastFrameTime);
}
}
#if LIBAVCODEC_VERSION_MAJOR > 53
avcodec_free_frame(&pDecodedFrame);
delete pDecodedFrame;
#endif
delete pTempPacket;
}
TargetFileMediaFoundation::TargetFileMediaFoundation( const DataTargetRef &dataTarget, size_t sampleRate, size_t numChannels, SampleType sampleType, const std::string &extension )
: TargetFile( dataTarget, sampleRate, numChannels, sampleType ), mStreamIndex( 0 )
{
MediaFoundationInitializer::initMediaFoundation();
::IMFSinkWriter *sinkWriter;
HRESULT hr = ::MFCreateSinkWriterFromURL( dataTarget->getFilePath().wstring().c_str(), NULL, NULL, &sinkWriter );
if( hr != S_OK ) {
string errorString = string( "TargetFileMediaFoundation: Failed to create SinkWriter from URL: " ) + dataTarget->getFilePath().string();
if( hr == HRESULT_FROM_WIN32( ERROR_FILE_NOT_FOUND ) )
errorString += ", file not found.";
throw AudioFileExc( errorString );
}
mSinkWriter = ci::msw::makeComUnique( sinkWriter );
mSampleSize = getBytesPerSample( mSampleType );
const UINT32 bitsPerSample = 8 * mSampleSize;
const WORD blockAlignment = mNumChannels * mSampleSize;
const DWORD averageBytesPerSecond = mSampleRate * blockAlignment;
// Set the output media type.
IMFMediaType *mediaType;
hr = ::MFCreateMediaType( &mediaType );
CI_ASSERT( hr == S_OK );
auto mediaTypeManaged = ci::msw::makeComUnique( mediaType );
hr = mediaType->SetGUID( MF_MT_MAJOR_TYPE, MFMediaType_Audio );
CI_ASSERT( hr == S_OK );
const ::GUID audioFormat = getMfAudioFormat( mSampleType );
hr = mediaType->SetGUID( MF_MT_SUBTYPE, audioFormat );
CI_ASSERT( hr == S_OK );
hr = mediaType->SetUINT32( MF_MT_AUDIO_SAMPLES_PER_SECOND, (UINT32)mSampleRate );
CI_ASSERT( hr == S_OK );
hr = mediaType->SetUINT32( MF_MT_AUDIO_BITS_PER_SAMPLE, bitsPerSample );
CI_ASSERT( hr == S_OK );
hr = mediaType->SetUINT32( MF_MT_AUDIO_BLOCK_ALIGNMENT, blockAlignment );
CI_ASSERT( hr == S_OK );
hr = mediaType->SetUINT32( MF_MT_AUDIO_AVG_BYTES_PER_SECOND, averageBytesPerSecond );
CI_ASSERT( hr == S_OK );
hr = mediaType->SetUINT32( MF_MT_AUDIO_NUM_CHANNELS, (UINT32)mNumChannels );
CI_ASSERT( hr == S_OK );
hr = mediaType->SetUINT32( MF_MT_ALL_SAMPLES_INDEPENDENT, 1 );
CI_ASSERT( hr == S_OK );
hr = mediaType->SetUINT32( MF_MT_FIXED_SIZE_SAMPLES, 1 );
CI_ASSERT( hr == S_OK );
hr = mSinkWriter->AddStream( mediaType, &mStreamIndex );
CI_ASSERT( hr == S_OK );
// Tell the sink writer to start accepting data.
hr = mSinkWriter->BeginWriting();
CI_ASSERT( hr == S_OK );
}
// TODO: test setting MF_LOW_LATENCY attribute
void SourceFileMediaFoundation::initReader()
{
CI_ASSERT( mDataSource );
mFramesRemainingInReadBuffer = 0;
::IMFAttributes *attributes;
HRESULT hr = ::MFCreateAttributes( &attributes, 1 );
CI_ASSERT( hr == S_OK );
auto attributesPtr = ci::msw::makeComUnique( attributes );
::IMFSourceReader *sourceReader;
if( mDataSource->isFilePath() ) {
hr = ::MFCreateSourceReaderFromURL( mDataSource->getFilePath().wstring().c_str(), attributesPtr.get(), &sourceReader );
if( hr != S_OK ) {
string errorString = string( "SourceFileMediaFoundation: Failed to create SourceReader from URL: " ) + mDataSource->getFilePath().string();
if( hr == HRESULT_FROM_WIN32( ERROR_FILE_NOT_FOUND ) )
errorString += ", file not found.";
throw AudioFileExc( errorString );
}
}
else {
mComIStream = ci::msw::makeComUnique( new ci::msw::ComIStream( mDataSource->createStream() ) );
::IMFByteStream *byteStream;
hr = ::MFCreateMFByteStreamOnStream( mComIStream.get(), &byteStream );
CI_ASSERT( hr == S_OK );
mByteStream = ci::msw::makeComUnique( byteStream );
hr = ::MFCreateSourceReaderFromByteStream( byteStream, attributesPtr.get(), &sourceReader );
if( hr != S_OK )
throw AudioFileExc( "SourceFileMediaFoundation: Failed to create SourceReader from resource." );
}
mSourceReader = ci::msw::makeComUnique( sourceReader );
// get files native format
::IMFMediaType *nativeType;
::WAVEFORMATEX *nativeFormat;
UINT32 formatSize;
hr = mSourceReader->GetNativeMediaType( MF_SOURCE_READER_FIRST_AUDIO_STREAM, 0, &nativeType );
CI_ASSERT( hr == S_OK );
auto nativeTypeUnique = ci::msw::makeComUnique( nativeType );
hr = ::MFCreateWaveFormatExFromMFMediaType( nativeType, &nativeFormat, &formatSize );
CI_ASSERT( hr == S_OK );
mNumChannels = nativeFormat->nChannels;
mSampleRate = nativeFormat->nSamplesPerSec;
GUID outputSubType = MFAudioFormat_PCM; // default to PCM 16-bit int, upgrade if we can.
mSampleType = SampleType::INT_16;
if( nativeFormat->wBitsPerSample == 32 ) {
mSampleType = SampleType::FLOAT_32;
outputSubType = MFAudioFormat_Float;
}
else if( nativeFormat->wBitsPerSample == 24 ) {
mSampleType = SampleType::INT_24;
if( mNumChannels > 1 )
mBitConverterBuffer.setSize( getMaxFramesPerRead(), mNumChannels );
}
::CoTaskMemFree( nativeFormat );
mBytesPerSample = getBytesPerSample( mSampleType );
mReadBuffer.setSize( getMaxFramesPerRead(), mNumChannels );
// set output type, which loads the proper decoder:
::IMFMediaType *outputType;
hr = ::MFCreateMediaType( &outputType );
auto outputTypeRef = ci::msw::makeComUnique( outputType );
hr = outputTypeRef->SetGUID( MF_MT_MAJOR_TYPE, MFMediaType_Audio );
CI_ASSERT( hr == S_OK );
hr = outputTypeRef->SetGUID( MF_MT_SUBTYPE, outputSubType );
CI_ASSERT( hr == S_OK );
hr = mSourceReader->SetCurrentMediaType( MF_SOURCE_READER_FIRST_AUDIO_STREAM, 0, outputTypeRef.get() );
CI_ASSERT( hr == S_OK );
// after the decoder is loaded, we have to now get the 'complete' output type before retrieving its format
::IMFMediaType *completeOutputType;
hr = mSourceReader->GetCurrentMediaType( MF_SOURCE_READER_FIRST_AUDIO_STREAM, &completeOutputType );
CI_ASSERT( hr == S_OK );
::WAVEFORMATEX *format;
hr = ::MFCreateWaveFormatExFromMFMediaType( completeOutputType, &format, &formatSize );
CI_ASSERT( hr == S_OK );
::CoTaskMemFree( format );
// get seconds:
::PROPVARIANT durationProp;
hr = mSourceReader->GetPresentationAttribute( MF_SOURCE_READER_MEDIASOURCE, MF_PD_DURATION, &durationProp );
CI_ASSERT( hr == S_OK );
LONGLONG duration = durationProp.uhVal.QuadPart;
mSeconds = nanoSecondsToSeconds( duration );
mNumFrames = mFileNumFrames = size_t( mSeconds * (double)mSampleRate );
::PROPVARIANT seekProp;
hr = mSourceReader->GetPresentationAttribute( MF_SOURCE_READER_MEDIASOURCE, MF_SOURCE_READER_MEDIASOURCE_CHARACTERISTICS, &seekProp );
CI_ASSERT( hr == S_OK );
ULONG flags = seekProp.ulVal;
mCanSeek = ( ( flags & MFMEDIASOURCE_CAN_SEEK ) == MFMEDIASOURCE_CAN_SEEK );
}
IFrame* AudioFrameBuffer::getFrameSampleNb(const size_t sampleNb)
{
const size_t expectedSize = sampleNb * getBytesPerSample();
return getFrame(expectedSize);
}
