int qDecodeAPI(QDecoder *decoder, char* bytes, int byteSize)
{
OSErr err;
ICMFrameTimeRecord frameTime = {{0}};
TimeValue time;
decoder->inFrameCount++;
time = decoder->inFrameCount * 100; // make up something plausible
frameTime.recordSize = sizeof(ICMFrameTimeRecord);
*(TimeValue64 *)&frameTime.value = time;
frameTime.scale = decoder->timeScale;
frameTime.rate = fixed1;
frameTime.frameNumber = decoder->inFrameCount;
frameTime.flags = icmFrameTimeIsNonScheduledDisplayTime;
err = ICMDecompressionSessionDecodeFrame(decoder->session, (UInt8*)bytes, byteSize, NULL, &frameTime, NULL);
if (err != noErr) {
fprintf(QSTDERR, "\nqDecodeQT(): cannot decode frame");
fprintf(QSTDERR, "\n\tQUICKTIME ERROR CODE: %d", err);
return -5;
}
ICMDecompressionSessionSetNonScheduledDisplayTime(decoder->session, time, decoder->timeScale, 0 );
return noErr;
}
static HRESULT WINAPI QTVDecoder_Receive(TransformFilter *tf, IMediaSample *pSample)
{
QTVDecoderImpl* This = impl_from_TransformFilter(tf);
HRESULT hr;
DWORD cbSrcStream;
LPBYTE pbSrcStream;
ICMFrameTimeRecord frameTime = {{0}};
TimeValue time = 1;
TimeScale timeScale = 1;
OSStatus err = noErr;
LONGLONG tStart, tStop;
hr = IMediaSample_GetPointer(pSample, &pbSrcStream);
if (FAILED(hr))
{
ERR("Cannot get pointer to sample data (%x)\n", hr);
goto error;
}
cbSrcStream = IMediaSample_GetActualDataLength(pSample);
if (IMediaSample_GetTime(pSample, &tStart, &tStop) != S_OK)
tStart = tStop = 0;
time = tStart;
frameTime.recordSize = sizeof(ICMFrameTimeRecord);
*(TimeValue64 *)&frameTime.value = tStart;
frameTime.scale = 1;
frameTime.rate = fixed1;
frameTime.duration = tStop - tStart;
frameTime.frameNumber = 0;
frameTime.flags = icmFrameTimeIsNonScheduledDisplayTime;
err = ICMDecompressionSessionDecodeFrame(This->decompressionSession,
(UInt8 *)pbSrcStream, cbSrcStream, NULL, &frameTime, pSample);
if (err != noErr)
{
ERR("Error with ICMDecompressionSessionDecodeFrame\n");
hr = E_FAIL;
goto error;
}
ICMDecompressionSessionSetNonScheduledDisplayTime(This->decompressionSession, time, timeScale, 0);
ICMDecompressionSessionFlush(This->decompressionSession);
hr = This->decodeHR;
error:
return hr;
}
QTPixelBuffer QTDecompressionSession::decompress(QTPixelBuffer inBuffer)
{
if (!canDecompress(inBuffer))
return QTPixelBuffer();
inBuffer.lockBaseAddress();
ICMDecompressionSessionDecodeFrame(m_session,
static_cast<UInt8*>(inBuffer.baseAddress()),
inBuffer.dataSize(),
0, // frameOptions
0, // frameTime
0); // sourceFrameRefCon
// Because we passed in 0 for frameTime, the above function
// is synchronous, and the client callback will have been
// called before the function returns, and m_latestFrame
// will contain the newly decompressed frame.
return m_latestFrame;
}
