void CMediaPlayer::PlayFunc(ThreadParam *pParam)
{
CMediaSource *pSource;
CMediaDecoder *pDecoder;
CMediaRenderer *pRenderer;
int nTime;
bool bDrop;
int nReadSize, nSrcSize, nDecSize, nRndSize;
unsigned char *pSrcFrame, *pDecFrame, *pRndFrame;
pSource = pParam->pSource;
pDecoder = pParam->pDecoder;
pRenderer = pParam->pRenderer;
nTime = 0;
bDrop = false;
if (pDecoder != NULL)
{
nReadSize = pDecoder->GetInputSize();
pSrcFrame = new unsigned char[nReadSize];
nDecSize = pDecoder->GetOutputSize();
pDecFrame = new unsigned char[nDecSize];
pRndFrame = pDecFrame;
}
else
{
nReadSize = 0x1000;
pSrcFrame = new unsigned char[nReadSize];
pDecFrame = NULL;
pRndFrame = pSrcFrame;
}
for (;;)
{
m_pSemaphore->Wait(); //when paused, this thread will be blocked here
if (m_nState == STATE_STOP)
{
m_pSemaphore->Release();
break;
}
if (!pParam->bReferenceClock)
if (nTime + 100 < m_pClock->GetTime()) //time stamp behind the clock too much
bDrop = true;
m_pMutex->Lock(); //only one thread can read data from media source
nSrcSize = pSource->ReadData(pParam->nIndex, bDrop? NULL : pSrcFrame, nReadSize); //read a frame
m_pMutex->Unlock();
if (nSrcSize == 0) //no more frame to render
{
pRenderer->Flush(true);
m_pSemaphore->Release();
break;
}
nTime = pSource->GetOutputTime(pParam->nIndex);
if (bDrop) //drop this frame
bDrop = false;
else
{
if (pDecoder != NULL)
{
if (pParam->type != RENDER_TYPE_SPDIF)
nDecSize = pDecoder->Decode(pSrcFrame, nSrcSize, pDecFrame);
else
nDecSize = pDecoder->SPDIF(pSrcFrame, nSrcSize, pDecFrame);
}
else
nDecSize = nSrcSize;
nRndSize = nDecSize;
if (!pParam->bReferenceClock)
m_pClock->WaitFor(nTime); //wait until this frame can be rendered
pRenderer->Write(pRndFrame, nRndSize); //render a frame
if (pParam->bReferenceClock && nTime > 0)
m_pClock->SetTime(nTime); //update clock
}
m_pSemaphore->Release();
} //while
if (pParam->pDecoder)
pParam->pDecoder->Flush();
delete[] pSrcFrame;
delete[] pDecFrame;
}
