This is a newer API that is intended for decoders like the cuvid
wrapper. Until now, the wrapper required to set an awkward
"incomplete" hw_frames_ctx to set the device. Now the device
can be set directly, and the user can get AV_PIX_FMT_CUDA output
for a specific device simply by setting hw_device_ctx.
This still does a dummy ff_get_format() call at init time, and should
be fully backward compatible.
---
Not sure how to test correctly - it worked with mpv even when I
accidentally didn't use the correct VO device.
---
libavcodec/cuvid.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/libavcodec/cuvid.c b/libavcodec/cuvid.c
index 288083423e..3453003965 100644
--- a/libavcodec/cuvid.c
+++ b/libavcodec/cuvid.c
@@ -802,9 +802,17 @@ static av_cold int cuvid_decode_init(AVCodecContext *avctx)
goto error;
}
} else {
- ret = av_hwdevice_ctx_create(&ctx->hwdevice, AV_HWDEVICE_TYPE_CUDA,
ctx->cu_gpu, NULL, 0);
- if (ret < 0)
- goto error;
+ if (avctx->hw_device_ctx) {
+ ctx->hwdevice = av_buffer_ref(avctx->hw_device_ctx);
+ if (!ctx->hwdevice) {
+ ret = AVERROR(ENOMEM);
+ goto error;
+ }
+ } else {
+ ret = av_hwdevice_ctx_create(&ctx->hwdevice,
AV_HWDEVICE_TYPE_CUDA, ctx->cu_gpu, NULL, 0);
+ if (ret < 0)
+ goto error;
+ }
ctx->hwframe = av_hwframe_ctx_alloc(ctx->hwdevice);
if (!ctx->hwframe) {
--
2.11.0
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