HRESULT D3DPresentEngine::createVideoSamples(IMFMediaType *format, QList<IMFSample*> &videoSampleQueue)
{
if (!format)
return MF_E_UNEXPECTED;
HRESULT hr = S_OK;
D3DPRESENT_PARAMETERS pp;
IDirect3DSwapChain9 *swapChain = NULL;
IMFSample *videoSample = NULL;
QMutexLocker locker(&m_mutex);
releaseResources();
// Get the swap chain parameters from the media type.
hr = getSwapChainPresentParameters(format, &pp);
if (FAILED(hr))
goto done;
// Create the video samples.
for (int i = 0; i < PRESENTER_BUFFER_COUNT; i++) {
// Create a new swap chain.
hr = m_device->CreateAdditionalSwapChain(&pp, &swapChain);
if (FAILED(hr))
goto done;
// Create the video sample from the swap chain.
hr = createD3DSample(swapChain, &videoSample);
if (FAILED(hr))
goto done;
// Add it to the list.
videoSample->AddRef();
videoSampleQueue.append(videoSample);
// Set the swap chain pointer as a custom attribute on the sample. This keeps
// a reference count on the swap chain, so that the swap chain is kept alive
// for the duration of the sample's lifetime.
hr = videoSample->SetUnknown(MFSamplePresenter_SampleSwapChain, swapChain);
if (FAILED(hr))
goto done;
qt_wmf_safeRelease(&videoSample);
qt_wmf_safeRelease(&swapChain);
}
done:
if (FAILED(hr))
releaseResources();
qt_wmf_safeRelease(&swapChain);
qt_wmf_safeRelease(&videoSample);
return hr;
}
HRESULT D3DPresentEngine::CreateVideoSamples(
IMFMediaType *pFormat,
VideoSampleList& videoSampleQueue
)
{
if (m_hwnd == NULL)
{
return MF_E_INVALIDREQUEST;
}
if (pFormat == NULL)
{
return MF_E_UNEXPECTED;
}
HRESULT hr = S_OK;
D3DPRESENT_PARAMETERS pp;
IDirect3DSwapChain9 *pSwapChain = NULL; // Swap chain
IMFSample *pVideoSample = NULL; // Sampl
AutoLock lock(m_ObjectLock);
ReleaseResources();
// Get the swap chain parameters from the media type.
CHECK_HR(hr = GetSwapChainPresentParameters(pFormat, &pp));
if(m_pRenderSurface)
{
SAFE_RELEASE(m_pRenderSurface);
}
// Create the video samples.
for (int i = 0; i < m_bufferCount; i++)
{
// Create a new swap chain.
CHECK_HR(hr = m_pDevice->CreateAdditionalSwapChain(&pp, &pSwapChain));
// Create the video sample from the swap chain.
CHECK_HR(hr = CreateD3DSample(pSwapChain, &pVideoSample));
// Add it to the list.
CHECK_HR(hr = videoSampleQueue.InsertBack(pVideoSample));
// Set the swap chain pointer as a custom attribute on the sample. This keeps
// a reference count on the swap chain, so that the swap chain is kept alive
// for the duration of the sample's lifetime.
CHECK_HR(hr = pVideoSample->SetUnknown(MFSamplePresenter_SampleSwapChain, pSwapChain));
SAFE_RELEASE(pVideoSample);
SAFE_RELEASE(pSwapChain);
}
// Let the derived class create any additional D3D resources that it needs.
CHECK_HR(hr = OnCreateVideoSamples(pp));
done:
if (FAILED(hr))
{
ReleaseResources();
}
SAFE_RELEASE(pSwapChain);
SAFE_RELEASE(pVideoSample);
return hr;
}
HRESULT WavStream::RequestSample(IUnknown* pToken)
{
if (m_pSource == NULL)
{
return E_UNEXPECTED;
}
HRESULT hr = S_OK;
IMFMediaSource *pSource = NULL;
IMFSample *pSample = NULL; // Sample to deliver.
EnterCriticalSection(&m_critSec);
// Check if we are shut down.
hr = CheckShutdown();
// Check if we already reached the end of the stream.
if (SUCCEEDED(hr))
{
if (m_EOS)
{
hr = MF_E_END_OF_STREAM;
}
}
// Check the source is stopped.
// GetState does not hold the source's critical section. Safe to call.
if (SUCCEEDED(hr))
{
if (m_pSource->GetState() == WavSource::STATE_STOPPED)
{
hr = MF_E_INVALIDREQUEST;
}
}
if (SUCCEEDED(hr))
{
// Create a new audio sample.
hr = CreateAudioSample(&pSample);
}
if (SUCCEEDED(hr))
{
// If the caller provided a token, attach it to the sample as
// an attribute.
// NOTE: If we processed sample requests asynchronously, we would
// need to call AddRef on the token and put the token onto a FIFO
// queue. See documenation for IMFMediaStream::RequestSample.
if (pToken)
{
hr = pSample->SetUnknown(MFSampleExtension_Token, pToken);
}
}
// If paused, queue the sample for later delivery. Otherwise, deliver the sample now.
if (SUCCEEDED(hr))
{
if (m_pSource->GetState() == WavSource::STATE_PAUSED)
{
hr = m_sampleQueue.Queue(pSample);
}
else
{
hr = DeliverSample(pSample);
}
}
// Cache a pointer to the source, prior to leaving the critical section.
if (SUCCEEDED(hr))
{
pSource = m_pSource;
pSource->AddRef();
}
LeaveCriticalSection(&m_critSec);
// We only have one stream, so the end of the stream is also the end of the
// presentation. Therefore, when we reach the end of the stream, we need to
// queue the end-of-presentation event from the source. Logically we would do
// this inside the CheckEndOfStream method. However, we cannot hold the
// source's critical section while holding the stream's critical section, at
// risk of deadlock.
if (SUCCEEDED(hr))
{
if (m_EOS)
{
hr = pSource->QueueEvent(MEEndOfPresentation, GUID_NULL, S_OK, NULL);
}
}
SafeRelease(&pSample);
SafeRelease(&pSource);
return hr;
}
HRESULT MPEG1Stream::DispatchSamples()
{
HRESULT hr = S_OK;
BOOL bNeedData = FALSE;
BOOL bEOS = FALSE;
IMFSample *pSample = NULL;
IUnknown *pToken = NULL;
SourceLock lock(m_pSource);
// It's possible that an I/O request completed after the source
// paused, stopped, or shut down. We should not deliver any samples
// unless the source is running.
if (m_state != STATE_STARTED)
{
hr = S_OK;
goto done;
}
// Deliver as many samples as we can.
while (!m_Samples.IsEmpty() && !m_Requests.IsEmpty())
{
// Pull the next sample from the queue.
CHECK_HR(hr = m_Samples.RemoveFront(&pSample));
// Pull the next request token from the queue. Tokens can be NULL.
CHECK_HR(hr = m_Requests.RemoveFront(&pToken));
if (pToken)
{
CHECK_HR(hr = pSample->SetUnknown(MFSampleExtension_Token, pToken));
}
CHECK_HR(hr = m_pEventQueue->QueueEventParamUnk(MEMediaSample, GUID_NULL, S_OK, pSample));
SAFE_RELEASE(pSample);
SAFE_RELEASE(pToken);
}
if (m_Samples.IsEmpty() && m_bEOS)
{
// The sample queue is empty AND we have reached the end of the source stream.
// Notify the pipeline by sending the end-of-stream event.
CHECK_HR(hr = m_pEventQueue->QueueEventParamVar(MEEndOfStream, GUID_NULL, S_OK, NULL));
// Also notify the source, so that it can send the end-of-presentation event.
CHECK_HR(hr = m_pSource->QueueAsyncOperation(SourceOp::OP_END_OF_STREAM));
}
else if (NeedsData())
{
// The sample queue is empty and the request queue is not empty (and we did not
// reach the end of the stream). Ask the source for more data.
CHECK_HR(hr = m_pSource->QueueAsyncOperation(SourceOp::OP_REQUEST_DATA));
}
done:
// If there was an error, queue MEError from the source (except after shutdown).
if (FAILED(hr) && (m_state != STATE_SHUTDOWN))
{
m_pSource->QueueEvent(MEError, GUID_NULL, hr, NULL);
}
SAFE_RELEASE(pSample);
SAFE_RELEASE(pToken);
return S_OK;
}
HRESULT PpboxStream::DispatchSamples()
{
HRESULT hr = S_OK;
BOOL bNeedData = FALSE;
BOOL bEOS = FALSE;
SourceLock lock(m_pSource);
// An I/O request can complete after the source is paused, stopped, or
// shut down. Do not deliver samples unless the source is running.
if (m_state != STATE_STARTED)
{
return S_OK;
}
IMFSample *pSample = NULL;
IUnknown *pToken = NULL;
// Deliver as many samples as we can.
while (!m_Samples.IsEmpty() && !m_Requests.IsEmpty())
{
// Pull the next sample from the queue.
hr = m_Samples.RemoveFront(&pSample);
if (FAILED(hr))
{
goto done;
}
// Pull the next request token from the queue. Tokens can be NULL.
hr = m_Requests.RemoveFront(&pToken);
if (FAILED(hr))
{
goto done;
}
if (pToken)
{
// Set the token on the sample.
hr = pSample->SetUnknown(MFSampleExtension_Token, pToken);
if (FAILED(hr))
{
goto done;
}
}
// Send an MEMediaSample event with the sample.
hr = m_pEventQueue->QueueEventParamUnk(
MEMediaSample, GUID_NULL, S_OK, pSample);
if (FAILED(hr))
{
goto done;
}
SafeRelease(&pSample);
SafeRelease(&pToken);
}
if (m_Samples.IsEmpty() && m_bEOS)
{
// The sample queue is empty AND we have reached the end of the source
// stream. Notify the pipeline by sending the end-of-stream event.
hr = m_pEventQueue->QueueEventParamVar(
MEEndOfStream, GUID_NULL, S_OK, NULL);
if (FAILED(hr))
{
goto done;
}
// Notify the source. It will send the end-of-presentation event.
hr = m_pSource->RequestSample();
if (FAILED(hr))
{
goto done;
}
}
else if (NeedsData())
{
// The sample queue is empty; the request queue is not empty; and we
// have not reached the end of the stream. Ask for more data.
hr = m_pSource->RequestSample();
if (FAILED(hr))
{
goto done;
}
} else {
hr = S_OK;
goto done;
}
done:
if (FAILED(hr) && (m_state != STATE_SHUTDOWN))
{
// An error occurred. Send an MEError even from the source,
// unless the source is already shut down.
m_pSource->QueueEvent(MEError, GUID_NULL, hr, NULL);
}
SafeRelease(&pSample);
SafeRelease(&pToken);
return S_OK;
}
