STDMETHODIMP CDelay::Process(ULONG ulSize, BYTE *pData, REFERENCE_TIME refTimeStart, DWORD dwFlags)
{
if (dwFlags &= ~DMO_INPLACE_ZERO)
return E_INVALIDARG;
if (!pData)
{
return E_POINTER;
}
ATLTRACE2(atlTraceGeneral, 3, "Process: %d bytes. Time stamp: %f\n",
ulSize, RefTime2Double(refTimeStart));
LockIt lock(this);
if (!InputTypeSet(0) || !OutputTypeSet(0))
{
return DMO_E_TYPE_NOT_SET;
}
// Make sure all streams have media types set and resources are allocated
HRESULT hr = AllocateStreamingResources();
if (SUCCEEDED(hr))
hr = DoProcessOutput(pData, pData, ulSize / m_pWave->nBlockAlign);
return hr;
// If this DMO supported an effect tail, it would return S_FALSE until
// the tail was processed. See IMediaObjectInPlace::Process documentation.
}
///////////////////////
//
// IMediaObjectInPlace::Process
//
// The Process method processes a block of data. The application supplies a
// pointer to a block of input data. The DMO processes the data in place.
//
// Parameters
//
// ulSize
// [in] Size of the data, in bytes.
//
// pData
// [in, out] Pointer to a buffer of size ulSize. On input, the buffer
// holds the input data. If the method returns successfully, the
// buffer contains the output data.
//
// refTimeStart
// [in] Start time of the data.
//
// dwFlags
// [in] Either DMO_INPLACE_NORMAL or DMO_INPLACE_ZERO. See Remarks
// for more information.
//
// Return Value
// S_FALSE Success. There is still data to process.
// S_TRUE Success. There is no remaining data to process.
// E_FAIL Failure.
//
// If the method fails, the buffer might contain garbage. The application
// should not use the contents of the buffer.
//
// The DMO might produce output data beyond the length of the input data. This
// is called an effect tail. For example, a reverb effect continues after the
// input reaches silence. If the DMO has an effect tail, this method returns
// S_FALSE.
//
// While the application has input data for processing, call the Process
// method with the dwFlags parameter set to DMO_INPLACE_NORMAL. If the last
// such call returns S_FALSE, call Process again, this time with a zeroed input
// buffer and the DMO_INPLACE_ZERO flag. The DMO will now fill the zeroed buffer
// with the effect tail. Continue calling Process in this way until the return
// value is S_TRUE, indicating that the DMO has finished processing the effect
// tail.
//
// If the DMO has no effect tail, this method always returns S_TRUE (or an error code).
//
HRESULT CHXAudioDeviceHookBase::Process(ULONG ulSize, BYTE *pData, REFERENCE_TIME refTimeStart, DWORD dwFlags)
{
// TODO: Modify implementation of Process() if necessary
HRESULT hr = S_OK;
if (!m_fInitialized)
{
hr = AllocateStreamingResources();
}
if (SUCCEEDED(hr))
{
// Process the data
hr = DoProcess(pData, pData, ulSize / WaveFormat()->nBlockAlign);
}
return hr;
}