public void captureSetup(iVideoTrack videoTrack, int decodedBuffersCount, sDecodedVideoSize decodedSize)
{
this.decodedSize = decodedSize;
if (pendingFrames.capacity != decodedBuffersCount)
{
pendingFrames = new PendingFrames(decodedBuffersCount);
}
// Set decoded format. Pi4 Linux failed to implement V4L2 stateful decoder setup workflow, instead computing everything manually, from parsed SPS.
sPixelFormatMP sdf = computeDecodedFormat(ref decodedSize);
device.setDataFormat(eBufferType.VideoCaptureMPlane, ref sdf);
// Apparently, Pi4 hardware or drivers is unable to process S_SELECTION request and crop the video. Cropping it later while rendering NV12 into RGB.
/* sSelection selection = default;
* selection.type = eBufferType.VideoCaptureMPlane;
* selection.target = eSelectionTarget.Compose;
* selection.flags = eSelectionFlags.LesserOrEqual;
* selection.rect = decodedSize.cropRect;
* device.file.call( eControlCode.S_SELECTION, ref selection );
* device.file.call( eControlCode.G_SELECTION, ref selection );
* CRect selectedRect = selection.rect;
* if( selectedRect == decodedSize.cropRect )
* Logger.logVerbose( "Video cropping: decoded size {0}, cropped to {1}", decodedSize.size, selectedRect );
* else
* Logger.logInfo( "Video cropping: decoded size {0}, asked to crop to {1}, GPU driver replaced with {2}", decodedSize.size, decodedSize.cropRect, selectedRect ); */
sdf = device.getDataFormat(eBufferType.VideoCaptureMPlane);
decoded = new DecodedQueue(device, decodedBuffersCount);
// decoded.exportTextures( renderDev, device, ref sdf );
// Start streaming of the output queue
device.startStreaming(eBufferType.VideoCaptureMPlane);
}