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cuvid: support AVCodecContext.hw_device_ctx API 

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.
This commit is contained in:
wm4 2017-05-05 00:15:21 +02:00
parent 974ee16d6a
commit c0f17a905f
3 changed files with 17 additions and 4 deletions
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5
doc/APIchanges
View File

@ -15,6 +15,11 @@ libavutil: 2015-08-28
API changes, most recent first:
2017-05-05 - xxxxxxxxxx - lavc 57.94.100 - avcodec.h
The cuvid decoders now support AVCodecContext.hw_device_ctx, which removes
the requirement to set an incomplete AVCodecContext.hw_frames_ctx only to
set the Cuda device handle.
2017-04-11 - 8378466507 - lavu 55.61.100 - avstring.h
Add av_strireplace().

14
libavcodec/cuvid.c
View File

@ -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
libavcodec/version.h
View File

@ -28,7 +28,7 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 57
#define LIBAVCODEC_VERSION_MINOR 93
#define LIBAVCODEC_VERSION_MINOR 94
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \