path: root/ffmpeg_cuvid.c (plain)
blob: 3ff3b40f17d0e291256546ea52a584c655984d4d

1	/*
2	* This file is part of FFmpeg.
3	*
4	* FFmpeg is free software; you can redistribute it and/or
5	* modify it under the terms of the GNU Lesser General Public
6	* License as published by the Free Software Foundation; either
7	* version 2.1 of the License, or (at your option) any later version.
8	*
9	* FFmpeg is distributed in the hope that it will be useful,
10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	* Lesser General Public License for more details.
13	*
14	* You should have received a copy of the GNU Lesser General Public
15	* License along with FFmpeg; if not, write to the Free Software
16	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17	*/
18
19	#include "libavutil/hwcontext.h"
20	#include "libavutil/pixdesc.h"
21
22	#include "ffmpeg.h"
23
24	static void cuvid_uninit(AVCodecContext *avctx)
25	{
26	InputStream *ist = avctx->opaque;
27	av_buffer_unref(&ist->hw_frames_ctx);
28	}
29
30	int cuvid_init(AVCodecContext *avctx)
31	{
32	InputStream *ist = avctx->opaque;
33	AVHWFramesContext *frames_ctx;
34	int ret;
35
36	av_log(avctx, AV_LOG_VERBOSE, "Initializing cuvid hwaccel\n");
37
38	if (!hw_device_ctx) {
39	ret = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_CUDA,
40	ist->hwaccel_device, NULL, 0);
41	if (ret < 0) {
42	av_log(avctx, AV_LOG_ERROR, "Error creating a CUDA device\n");
43	return ret;
44	}
45	}
46
47	av_buffer_unref(&ist->hw_frames_ctx);
48	ist->hw_frames_ctx = av_hwframe_ctx_alloc(hw_device_ctx);
49	if (!ist->hw_frames_ctx) {
50	av_log(avctx, AV_LOG_ERROR, "Error creating a CUDA frames context\n");
51	return AVERROR(ENOMEM);
52	}
53
54	frames_ctx = (AVHWFramesContext*)ist->hw_frames_ctx->data;
55
56	frames_ctx->format = AV_PIX_FMT_CUDA;
57	frames_ctx->sw_format = avctx->sw_pix_fmt;
58	frames_ctx->width = avctx->width;
59	frames_ctx->height = avctx->height;
60
61	av_log(avctx, AV_LOG_DEBUG, "Initializing CUDA frames context: sw_format = %s, width = %d, height = %d\n",
62	av_get_pix_fmt_name(frames_ctx->sw_format), frames_ctx->width, frames_ctx->height);
63
64	ret = av_hwframe_ctx_init(ist->hw_frames_ctx);
65	if (ret < 0) {
66	av_log(avctx, AV_LOG_ERROR, "Error initializing a CUDA frame pool\n");
67	return ret;
68	}
69
70	ist->hwaccel_uninit = cuvid_uninit;
71
72	return 0;
73	}
74