From 52d8f35b14bc379572e74d042d3466b8d3b6e7cf Mon Sep 17 00:00:00 2001 From: Philip Langdale Date: Sat, 30 Mar 2019 10:56:49 -0700 Subject: [PATCH] avutil/hcontext_cuda: Remove unnecessary stream synchronisation Similarly to the previous changes, we don't need to synchronise after a memcpy to device memory. On the other hand, we need to keep synchronising after a copy to host memory, otherwise there's no guarantee that subsequent host reads will return valid data. --- libavutil/hwcontext_cuda.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/libavutil/hwcontext_cuda.c b/libavutil/hwcontext_cuda.c index 540a7610ef..cca39e9fc7 100644 --- a/libavutil/hwcontext_cuda.c +++ b/libavutil/hwcontext_cuda.c @@ -268,10 +268,6 @@ static int cuda_transfer_data_to(AVHWFramesContext *ctx, AVFrame *dst, goto exit; } - ret = CHECK_CU(cu->cuStreamSynchronize(hwctx->stream)); - if (ret < 0) - goto exit; - exit: CHECK_CU(cu->cuCtxPopCurrent(&dummy));