LoaderSourceFileWindowsMedia::LoaderSourceFileWindowsMedia( SourceFileWindowsMedia * source, Target * target )
: Loader(), mSource( source ), mSampleOffset( 0 ), mSrcSampleRate( 0 ), mSrcChannelCount( 0 ), mSrcBitsPerSample( 0 )
{
::HRESULT hr;
//setup readers
IWMSyncReader * IWMReaderP = NULL;
hr = ::WMCreateSyncReader(0, 0, &IWMReaderP );
if( FAILED( hr ) ) {
throw IoExceptionFailedLoad();
}
mReader = msw::makeComShared<IWMSyncReader>( IWMReaderP );
IWMHeaderInfo * IWMHeaderInfoP = NULL;
hr = mReader->QueryInterface( IID_IWMHeaderInfo, (void**)&IWMHeaderInfoP );
if( FAILED(hr) ) {
throw IoExceptionFailedLoad();
}
mHeaderInfo = msw::makeComShared<IWMHeaderInfo>( IWMHeaderInfoP );
//turn data into stream
::IStream * iStreamP = NULL;
hr = ::CreateStreamOnHGlobal( mSource->mMemHandle.get(), FALSE, &iStreamP );
if(FAILED(hr)) {
throw IoExceptionFailedLoad();
}
std::shared_ptr<::IStream> pStream = msw::makeComShared<::IStream>( iStreamP );
hr = mReader->OpenStream( pStream.get() );
if( FAILED(hr) ) {
throw IoExceptionFailedLoad();
}
DWORD nOutputFormatCount;
hr = mReader->GetOutputFormatCount(0, &nOutputFormatCount);
if( FAILED(hr) ) {
throw IoExceptionFailedLoad();
}
DWORD nFormatSize = 0;
BYTE* pBuf = 0;
IWMOutputMediaProps* pProps = 0;
for( uint32_t j = 0; j < nOutputFormatCount; j++ ) {
hr = mReader->GetOutputFormat( 0, j, &pProps );
if(FAILED(hr)) {
continue;
}
//get required size of the media type structure
DWORD nNewSize = 0;
hr = pProps->GetMediaType( NULL, & nNewSize );
if( FAILED(hr) ) {
continue;
}
if(nNewSize > nFormatSize)
{
if( pBuf ) {
delete [] pBuf;
pBuf = 0;
}
nFormatSize = nNewSize;
pBuf = new BYTE[nFormatSize];
}
WM_MEDIA_TYPE* pType = (WM_MEDIA_TYPE*) pBuf;
size_t acrunk = sizeof( WM_MEDIA_TYPE );
hr = pProps->GetMediaType( pType, &nFormatSize );
if(FAILED(hr))
continue;
if( IsEqualIID( WMFORMAT_WaveFormatEx, pType->formattype ) )
{
//casting format buffer as WAVEFORMATEX
//when formattype == WMFORMAT_WaveFormatEx, pbFormat will be
//WAVEFORMATEX or WAVEFORMATEXTENSIBLE, both of which can be cast
//safely as WAVEFORMATEX
mOutputFormat = *((WAVEFORMATEX *)pType->pbFormat);
if( ( mOutputFormat.wFormatTag == ( ( target->isFloat() ) ? WAVE_FORMAT_IEEE_FLOAT : WAVE_FORMAT_PCM ) ) &&
( mOutputFormat.nChannels == target->getChannelCount() ) &&
( mOutputFormat.wBitsPerSample == target->getBitsPerSample() ) &&
( mOutputFormat.nSamplesPerSec == target->getSampleRate() ) &&
( mOutputFormat.nBlockAlign == target->getBlockAlign() )
) {
mSrcSampleRate = mOutputFormat.nSamplesPerSec;
mSrcChannelCount = mOutputFormat.nChannels;
mSrcBitsPerSample = mOutputFormat.wBitsPerSample;
mSrcBlockAlign = mOutputFormat.nBlockAlign;
break;
}
}
if( pProps ) {
pProps->Release();
pProps = 0;
}
}
if( pBuf ) {
delete [] pBuf;
pBuf = 0;
}
hr = mReader->SetOutputProps( 0, pProps );
if( FAILED( hr ) ) {
throw IoExceptionFailedLoad();
}
if( pProps ) {
pProps->Release();
pProps = 0;
}
WORD wStreamNum = 0;
WMT_ATTR_DATATYPE Type;
QWORD dwDuration = 0;
WORD wLength = 8;
hr = mHeaderInfo->GetAttributeByName( &wStreamNum, g_wszWMDuration, &Type, (BYTE*)&dwDuration, &wLength );
if( FAILED( hr ) ) {
throw IoExceptionFailedLoad();
}
//divide by 10 million to get seconds
double fTime = double( dwDuration ) / 10000000.0f;
mStreamSize = (uint32_t)( fTime * mOutputFormat.nAvgBytesPerSec * 1.5 );
DWORD tempMaxBufferSize = 0;
mMaxBufferSize = 0;
hr = mReader->GetMaxOutputSampleSize( 0, &tempMaxBufferSize );
mMaxBufferSize = tempMaxBufferSize;
if( FAILED( hr ) ) {
throw IoExceptionFailedLoad();
}
//set data to not be compressed
/*hr = mReader->SetReadStreamSamples( 0, FALSE );
if( FAILED( hr ) ) {
throw IoExceptionFailedLoad();
}*/
}
int decoder_load(unsigned long id, const string sname)
{
HRESULT hres;
IWMOutputMediaProps* ppProps;
WM_MEDIA_TYPE* wmt = 0;
DWORD wmpz = 0;
WAVEFORMATEX wfx;
DWORD i, outcount = 0;
IWMHeaderInfo* wminfo;
WORD wmistream = 0;
WMT_ATTR_DATATYPE Type;
WORD wmilen;
CoInitialize(0);
hres = WMCreateSyncReader(0, 0, &pstreams[id].wmreader);
if(FAILED(hres))return 0;
hres = pstreams[id].wmreader->Open(sname);
pstreams[id].wmreader->GetOutputCount(&outcount);
for(i=0; i<outcount; i++)
{
hres = pstreams[id].wmreader->GetOutputProps(i, &ppProps);
if(FAILED(hres))
{
ppProps->Release();
continue;
}
hres = ppProps->GetMediaType(0, &wmpz);
if(FAILED(hres))
{
ppProps->Release();
continue;
}
wmt = (WM_MEDIA_TYPE*) malloc(wmpz);
hres = ppProps->GetMediaType(wmt, &wmpz);
if(WMMEDIATYPE_Audio != wmt->majortype)
{
ppProps->Release();
free(wmt);
continue;
}
memcpy(&wfx, wmt->pbFormat, wmt->cbFormat);
pstreams[id].channels = wfx.nChannels;
pstreams[id].frequency = wfx.nSamplesPerSec;
pstreams[id].bitspersample = wfx.wBitsPerSample;
pstreams[id].wmaudioout = i;
free(wmt);
ppProps->Release();
break;
}
pstreams[id].buffer = 0;
pstreams[id].buffersize = 0;
/* get information */
hres = pstreams[id].wmreader->QueryInterface(IID_IWMHeaderInfo, (VOID **)&wminfo);
if(FAILED(hres))return 0;
wmistream = 0;
hres = wminfo->GetAttributeByName(&wmistream, g_wszWMDuration, &Type, 0, &wmilen);
if(hres == S_OK)
{
QWORD dur;
wminfo->GetAttributeByName(&wmistream, g_wszWMDuration, &Type, (BYTE*)&dur,&wmilen);
pstreams[id].duration = (DWORD)(dur / 10000);
}
wminfo->Release();
return 1;
}
