public Nv12Texture exportNv12(iGlesRenderDevice gles, VideoDevice device, ref sPixelFormatMP pixelFormat, ref ColorFormat colorFormat)
{
device.file.call(eControlCode.QUERYBUF, ref buffer);
sDmaBuffer dma = exportOutputBuffer(device, ref pixelFormat);
ITexture texture = gles.importNv12Texture(ref dma, ref colorFormat);
// Logger.logVerbose( "Exported NV12 texture: {0}", dma );
return(new Nv12Texture(texture));
}
/// <summary>Export all buffers from V4L2, import them into GLES in Diligent Engine</summary>
public void exportTextures(IRenderDevice renderDevice, VideoDevice device, ref sPixelFormatMP pixelFormat, ref ColorFormat color)
{
iGlesRenderDevice gles = ComLightCast.cast <iGlesRenderDevice>(renderDevice);
textures = new Nv12Texture[buffers.Length];
for (int i = 0; i < buffers.Length; i++)
{
textures[i] = buffers[i].exportNv12(gles, device, ref pixelFormat, ref color);
}
}
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));
}
