public sDmaBuffer exportOutputBuffer(VideoDevice device, ref sPixelFormatMP pixelFormat)
{
sExportBuffer eb = device.exportOutputBuffer(bufferIndex);
sPlanePixelFormat planeFormat = pixelFormat.getPlaneFormat(0);
sDmaBuffer dma = new sDmaBuffer()
{
fd = eb.fd,
offset = 0,
stride = planeFormat.bytesPerLine,
imageSize = planeFormat.bytesPerLine * pixelFormat.size.cy,
sizePixels = pixelFormat.size,
bufferIndex = bufferIndex
};
return(dma);
}
public VideoTextures exportTextures(iGlesRenderDevice gles, VideoDevice device, ref sPixelFormatMP pixelFormat)
{
sExportBuffer eb = new sExportBuffer()
{
type = eBufferType.VideoCaptureMPlane,
index = bufferIndex,
plane = 0,
flags = eFileFlags.O_RDONLY | eFileFlags.O_CLOEXEC
};
device.file.call(eControlCode.EXPBUF, ref eb);
sPlanePixelFormat planeFormat = pixelFormat.getPlaneFormat(0);
sDmaBuffer dma = new sDmaBuffer()
{
fd = eb.fd,
offset = 0,
stride = planeFormat.bytesPerLine,
imageSize = planeFormat.bytesPerLine * pixelFormat.size.cy,
sizePixels = pixelFormat.size,
bufferIndex = bufferIndex
};
ITexture luma = gles.importLumaTexture(ref dma);
Logger.logVerbose("Exported luma texture: {0}", dma);
// I asked V4L2 for 2 planes, however QUERYBUF returned a single plane, with the complete NV12 image in it.
// No big deal, we have EGL_DMA_BUF_PLANE0_OFFSET_EXT for that; that's where the sDmaBuffer.offset field goes.
dma.offset = dma.imageSize;
dma.sizePixels = chromaSize(pixelFormat.size);
dma.imageSize = dma.stride * dma.sizePixels.cy;
ITexture chroma = gles.importChromaTexture(ref dma);
Logger.logVerbose("Exported chroma texture: {0}", dma);
return(new VideoTextures(luma, chroma));
}
