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Don't allow copyback rendering on RPi by default

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This commit is contained in:
Cameron Gutman 2022-01-04 20:35:17 -06:00
parent 67c801c4e7
commit 72065412a3
1 changed files with 14 additions and 0 deletions
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14
app/streaming/video/ffmpeg-renderers/sdlvid.cpp
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@ -538,6 +538,20 @@ bool SdlRenderer::testRenderFrame(AVFrame* frame)
// back to render it. Test that this can be done
// for the given frame successfully.
if (frame->hw_frames_ctx != nullptr) {
#ifdef HAVE_MMAL
// FFmpeg for Raspberry Pi has NEON-optimized routines that allow
// us to use av_hwframe_transfer_data() to convert from SAND frames
// to standard fully-planar YUV. Unfortunately, the combination of
// doing this conversion on the CPU and the slow GL texture upload
// performance on the Pi make the performance of this approach
// unacceptable. Don't use this copyback path on the Pi by default
// to ensure we fall back to H.264 (with the MMAL renderer) in X11
// rather than using HEVC+copyback and getting terrible performance.
if (qgetenv("RPI_ALLOW_COPYBACK_RENDER") != "1") {
return false;
}
#endif
if (!initializeReadBackFormat(frame->hw_frames_ctx, frame)) {
return false;
}