path: root/ffmpeg_qsv.c (plain)
blob: 74427500291a5e10e83c109e118683dcf0115ee1

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 <mfx/mfxvideo.h>
20	#include <stdlib.h>
21
22	#include "libavutil/dict.h"
23	#include "libavutil/hwcontext.h"
24	#include "libavutil/hwcontext_qsv.h"
25	#include "libavutil/mem.h"
26	#include "libavutil/opt.h"
27	#include "libavcodec/qsv.h"
28
29	#include "ffmpeg.h"
30
31	char *qsv_device = NULL;
32
33	static int qsv_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
34	{
35	InputStream *ist = s->opaque;
36
37	return av_hwframe_get_buffer(ist->hw_frames_ctx, frame, 0);
38	}
39
40	static void qsv_uninit(AVCodecContext *s)
41	{
42	InputStream *ist = s->opaque;
43	av_buffer_unref(&ist->hw_frames_ctx);
44	}
45
46	static int qsv_device_init(InputStream *ist)
47	{
48	int err;
49	AVDictionary *dict = NULL;
50
51	if (qsv_device) {
52	err = av_dict_set(&dict, "child_device", qsv_device, 0);
53	if (err < 0)
54	return err;
55	}
56
57	err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_QSV,
58	ist->hwaccel_device, dict, 0);
59	if (err < 0) {
60	av_log(NULL, AV_LOG_ERROR, "Error creating a QSV device\n");
61	goto err_out;
62	}
63
64	err_out:
65	if (dict)
66	av_dict_free(&dict);
67
68	return err;
69	}
70
71	int qsv_init(AVCodecContext *s)
72	{
73	InputStream *ist = s->opaque;
74	AVHWFramesContext *frames_ctx;
75	AVQSVFramesContext *frames_hwctx;
76	int ret;
77
78	if (!hw_device_ctx) {
79	ret = qsv_device_init(ist);
80	if (ret < 0)
81	return ret;
82	}
83
84	av_buffer_unref(&ist->hw_frames_ctx);
85	ist->hw_frames_ctx = av_hwframe_ctx_alloc(hw_device_ctx);
86	if (!ist->hw_frames_ctx)
87	return AVERROR(ENOMEM);
88
89	frames_ctx = (AVHWFramesContext*)ist->hw_frames_ctx->data;
90	frames_hwctx = frames_ctx->hwctx;
91
92	frames_ctx->width = FFALIGN(s->coded_width, 32);
93	frames_ctx->height = FFALIGN(s->coded_height, 32);
94	frames_ctx->format = AV_PIX_FMT_QSV;
95	frames_ctx->sw_format = s->sw_pix_fmt;
96	frames_ctx->initial_pool_size = 64;
97	frames_hwctx->frame_type = MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
98
99	ret = av_hwframe_ctx_init(ist->hw_frames_ctx);
100	if (ret < 0) {
101	av_log(NULL, AV_LOG_ERROR, "Error initializing a QSV frame pool\n");
102	return ret;
103	}
104
105	ist->hwaccel_get_buffer = qsv_get_buffer;
106	ist->hwaccel_uninit = qsv_uninit;
107
108	return 0;
109	}
110