unsigned long decoder_read(unsigned long id, void* adata, unsigned long dsize)
{
HRESULT hres = 0;
DWORD i = 0;
INSSBuffer* ppSample;
QWORD pcnsSampleTime;
QWORD pcnsDuration;
DWORD pdwFlags;
DWORD pdwOutputNum;
WORD pwStreamNum;
DWORD lenret = 0;
unsigned char* ptbuff;
if(pstreams[id].buffersize && (pstreams[id].bufferpt < pstreams[id].buffersize))
{
memmove((char*)adata, pstreams[id].buffer + pstreams[id].bufferpt, min(dsize, pstreams[id].buffersize - pstreams[id].bufferpt));
i += min(dsize, pstreams[id].buffersize - pstreams[id].bufferpt);
pstreams[id].bufferpt += min(dsize, pstreams[id].buffersize - pstreams[id].bufferpt);
if(i >= dsize)return dsize;
}
while(1)
{
hres = pstreams[id].wmreader->GetNextSample((WORD)pstreams[id].wmaudioout, &ppSample, &pcnsSampleTime, &pcnsDuration, &pdwFlags, &pdwOutputNum, &pwStreamNum);
if(hres == NS_E_NO_MORE_SAMPLES || FAILED(hres))return 0;
ppSample->GetBufferAndLength(&ptbuff, &lenret);
if(!lenret)break;
memmove((char*)adata + i, ptbuff, min(dsize - i, lenret));
i += lenret;
if(i > dsize)
{
if(!pstreams[id].buffer)
{
pstreams[id].buffer = (char*)malloc(lenret);
pstreams[id].bufferallocsize = lenret;
pstreams[id].buffersize = lenret;
}else{
if(lenret > pstreams[id].bufferallocsize)
{
pstreams[id].buffer = (char*) realloc(pstreams[id].buffer, lenret);
pstreams[id].bufferallocsize = lenret;
}
pstreams[id].buffersize = lenret;
}
memcpy(pstreams[id].buffer, ptbuff, lenret);
pstreams[id].bufferpt = lenret - (i - dsize);
}
ppSample->Release();
if(i >= dsize)return dsize;
}
return i;
}
// THREADED, NO TOUCH
int CVideoInstance::NextFrame()
{
HRESULT hr = S_OK;
QWORD cnsSampleTime = 0;
QWORD cnsSampleDuration = 0;
DWORD dwFlags = 0;
if (!mySyncReader)
{
return 0;
}
INSSBuffer* iNSSBuffer;
hr = mySyncReader->GetNextSample(myVideoStreamNumber,
&iNSSBuffer,
&cnsSampleTime,
&cnsSampleDuration,
&dwFlags,
NULL,//&dwOutputNumber,
NULL);
if (hr == NS_E_NO_MORE_SAMPLES)
{
//no more samples to read in file
myIsStreamDone = true;
return 0;
}
if (SUCCEEDED(hr))
{
// TODO: Process the sample in whatever way is appropriate
// to your application. When finished, clean up.
if (dwFlags == WM_SF_CLEANPOINT) //this a clean point frame, a picture to take read sdk for explantion
{
// AfxMessageBox("found new sample");
//1. Get the Bitmap from the frame
//BYTE* meir;
unsigned char *buffer;
iNSSBuffer->GetBufferAndLength(&buffer, &myDwrdBitmapBufferLength);
if (myBitmapBuffer == NULL)
{
myBitmapBuffer = new unsigned char[myDwrdBitmapBufferLength];
}
memcpy(myBitmapBuffer, buffer, myDwrdBitmapBufferLength);
//calc the current postion in seconds
m_qwCurrrentPostionInSeconds = (cnsSampleTime * 100) / 1000000000;
myFramesRead++;
}
iNSSBuffer->Release();
iNSSBuffer = NULL;
}
return 1;
}
//------------------------------------------------------------------------------
// Name: FrameNumberToTime()
// Desc: Converts a frame number to a reference time (100-nanosecond units).
//
// pSyncReader: Pointer to the synchronous reader's IWMSyncReader interface.
// wFrameSeekStream: Specifies the stream number.
// qwFrame: Specifies the frame number.
// prtFrameTime: Receives the reference time.
//------------------------------------------------------------------------------
HRESULT FrameNumberToTime( IWMSyncReader * pSyncReader, WORD wFrameSeekStream,
QWORD qwFrame, REFERENCE_TIME * prtFrameTime )
{
if( !pSyncReader || !prtFrameTime )
return E_POINTER;
// Use the Windows Media Format SDK synchronous reader object to seek to
// the specified frame. The reader object returns the presentation time
// for the next sample.
// Seek to the specified frame number.
HRESULT hr = pSyncReader->SetRangeByFrame( wFrameSeekStream, qwFrame, 0 );
if( FAILED( hr ) )
{
_tprintf(_T("SetRangeByFrameFailed... hr=0x%x\nPlayback aborted.\n\n"), hr);
}
else
{
// Get the next sample and return the presentation time to the caller.
INSSBuffer * pINSSBuffer;
QWORD qwSampleTime, qwSampleDuration;
DWORD dwFlags;
WORD idStream;
hr = pSyncReader->GetNextSample(
wFrameSeekStream,
&pINSSBuffer,
&qwSampleTime,
&qwSampleDuration,
&dwFlags,
NULL,
&idStream );
if( SUCCEEDED( hr ) )
{
pINSSBuffer->Release();
*prtFrameTime = qwSampleTime;
}
}
return hr;
}
//----------------------------------------------------------------------------
//! @brief 次のサンプルを得る
//! @param pSample : サンプルを返すポインタのポインタ
//! @return エラーコード
//----------------------------------------------------------------------------
HRESULT CWMOutput::GetNextSample( IMediaSample **pSample )
{
HRESULT hr;
if( m_StreamNum == 0 || pSample == NULL )
return S_FALSE; // このストリームはない
INSSBuffer *pWMSample = NULL;
QWORD cnsSampleTime;
QWORD cnsDuration;
DWORD dwFlags;
if( FAILED(hr = WMReader()->GetNextSample( m_StreamNum, &pWMSample, &cnsSampleTime, &cnsDuration, &dwFlags, NULL, NULL )) )
{
if( hr == NS_E_NO_MORE_SAMPLES ) return S_FALSE;
return hr;
}
REFERENCE_TIME startTime = (REFERENCE_TIME)cnsSampleTime;
REFERENCE_TIME endTime = (REFERENCE_TIME)(cnsSampleTime + cnsDuration);
IMediaSample *pOutSample = reinterpret_cast<CWMBuffer*>(pWMSample)->GetSample();
pOutSample->AddRef();
pWMSample->Release();
pOutSample->SetMediaTime(&startTime, &endTime);
#if 0
if( startTime < Reader()->m_StartTime )
pOutSample->SetPreroll(TRUE);
else
pOutSample->SetPreroll(FALSE);
#endif
startTime -= Reader()->m_StartTime;
endTime -= Reader()->m_StartTime;
pOutSample->SetTime(&startTime, &endTime);
pOutSample->SetSyncPoint(dwFlags & WM_SF_CLEANPOINT);
*pSample = pOutSample;
return hr;
}
HRESULT CReader::ReadSamples()
{
HRESULT hr = S_OK;
INSSBuffer* pSample = NULL;
WORD wStream = 1;
WMT_STREAM_SELECTION wmtSS = WMT_ON;
QWORD cnsSampleTime = 0, cnsPrevSampleTime = 0;
QWORD cnsDuration = 0;
DWORD dwFlags = 0;
DWORD dwOutputNum = 0;
WORD wStreamNum = 0;
static DWORD dwVideoSamplesCnt = 0;
static DWORD dwAudioSamplesCnt = 0;
if( 0 != m_wAudioStreamNum )
{
if( m_fAudioStream )
{
wmtSS = WMT_ON;
}
else
{
wmtSS = WMT_OFF;
}
hr = m_pReader->SetStreamsSelected( 1, &m_wAudioStreamNum, &wmtSS );
if ( FAILED( hr ) )
{
_tprintf( _T( "SetStreamsSelected (hr=0x%08x).\n" ), hr );
return( hr );
}
hr = m_pReader->SetReadStreamSamples( m_wAudioStreamNum, m_fCompressed );
if ( FAILED( hr ) )
{
_tprintf( _T( "SetReadStreamSamples (hr=0x%08x).\n" ), hr );
return( hr );
}
}
if( 0 != m_wVideoStreamNum )
{
if( m_fVideoStream )
{
wmtSS = WMT_ON;
}
else
{
wmtSS = WMT_OFF;
}
hr = m_pReader->SetStreamsSelected( 1, &m_wVideoStreamNum, &wmtSS );
if ( FAILED( hr ) )
{
_tprintf( _T( "SetStreamsSelected (hr=0x%08x).\n" ), hr );
return( hr );
}
hr = m_pReader->SetReadStreamSamples( m_wVideoStreamNum, m_fCompressed );
if ( FAILED( hr ) )
{
_tprintf( _T( "SetReadStreamSamples (hr=0x%08x).\n" ), hr );
return( hr );
}
if( m_fRangeInFrames )
{
QWORD qwDuration = 0;
if( 0 != m_cnsEnd )
{
qwDuration = m_cnsEnd - m_cnsStart;
}
hr = m_pReader->SetRangeByFrame( m_wVideoStreamNum, m_cnsStart, qwDuration );
if ( FAILED( hr ) )
{
_tprintf( _T( "SetRangeByFrame (hr=0x%08x).\n" ), hr );
return( hr );
}
}
}
if( 0 == m_wVideoStreamNum || ( !m_fRangeInFrames && 0 != m_wVideoStreamNum ) )
{
QWORD qwDuration = 0;
if( 0 != m_cnsEnd )
{
qwDuration = ( m_cnsEnd - m_cnsStart ) * 10000L;
}
hr = m_pReader->SetRange( m_cnsStart * 10000L, qwDuration );
if ( FAILED( hr ) )
{
_tprintf( _T( "SetRange (hr=0x%08x).\n" ), hr );
return( hr );
}
}
_tprintf( _T( "\nGetting samples ...\n" ) );
while( SUCCEEDED( hr ) )
{
hr = m_pReader->GetNextSample( 0, &pSample,
&cnsSampleTime,
&cnsDuration,
&dwFlags,
&dwOutputNum,
&wStreamNum );
if( FAILED( hr ) )
{
if( NS_E_NO_MORE_SAMPLES == hr )
{
hr = S_OK;
_tprintf( _T( "\nLast sample reached.\n" ) );
_tprintf( _T( "\nLast sample time : %lu ms\n" ), cnsPrevSampleTime/10000 );
break;
}
else
{
_tprintf( _T( "GetNextSample() failed : (hr=0x%08x).\n" ), hr );
return( hr );
}
}
cnsPrevSampleTime = cnsSampleTime;
if( 0 == dwVideoSamplesCnt && 0 == dwAudioSamplesCnt )
{
_tprintf( _T( "\nFirst sample time : %lu ms\n" ), cnsSampleTime/10000 );
}
if( m_wVideoStreamNum == wStreamNum )
{
dwVideoSamplesCnt++;
if ( 0 == dwVideoSamplesCnt % 4 )
{
_tprintf( _T( "v" ) );
}
}
else if( m_wAudioStreamNum == wStreamNum )
{
dwAudioSamplesCnt++;
if ( 0 == dwAudioSamplesCnt % 4 )
{
_tprintf( _T( "a" ) );
}
}
pSample->Release();
}
return( hr );
}