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authorPhilip Langdale <philipl@overt.org>2019-03-30 10:56:49 -0700
committerPhilip Langdale <philipl@overt.org>2019-03-30 10:56:49 -0700
commit52d8f35b14bc379572e74d042d3466b8d3b6e7cf (patch)
treea5b3bd2f587fbb237e7bd7daf142d5e2724e043f
parent5d90d1e36ef3abfa2843e54389d0ffd0fa7ca405 (diff)
downloadffmpeg-52d8f35b14bc379572e74d042d3466b8d3b6e7cf.tar.gz
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.
-rw-r--r--libavutil/hwcontext_cuda.c4
1 files changed, 0 insertions, 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));