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ffmpeg_cuvid.c
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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;
28 }
29 
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) {
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 
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 
65  if (ret < 0) {
66  av_log(avctx, AV_LOG_ERROR, "Error initializing a CUDA frame pool\n");
67  return ret;
68  }
69 
71 
72  return 0;
73 }
#define NULL
Definition: coverity.c:32
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
AVBufferRef * hw_frames_ctx
Definition: ffmpeg.h:379
int width
The allocated dimensions of the frames in this pool.
Definition: hwcontext.h:227
enum AVPixelFormat format
The pixel format identifying the underlying HW surface type.
Definition: hwcontext.h:207
int av_hwdevice_ctx_create(AVBufferRef **pdevice_ref, enum AVHWDeviceType type, const char *device, AVDictionary *opts, int flags)
Open a device of the specified type and create an AVHWDeviceContext for it.
Definition: hwcontext.c:565
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static AVBufferRef * hw_device_ctx
Definition: hw_decode.c:43
void(* hwaccel_uninit)(AVCodecContext *s)
Definition: ffmpeg.h:374
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int av_hwframe_ctx_init(AVBufferRef *ref)
Finalize the context before use.
Definition: hwcontext.c:325
int width
picture width / height.
Definition: avcodec.h:1660
HW acceleration through CUDA.
Definition: pixfmt.h:231
main external API structure.
Definition: avcodec.h:1488
uint8_t * data
The data buffer.
Definition: buffer.h:89
This struct describes a set or pool of "hardware" frames (i.e.
Definition: hwcontext.h:122
int cuvid_init(AVCodecContext *avctx)
Definition: ffmpeg_cuvid.c:30
AVBufferRef * av_hwframe_ctx_alloc(AVBufferRef *device_ref_in)
Allocate an AVHWFramesContext tied to a given device context.
Definition: hwcontext.c:239
char * hwaccel_device
Definition: ffmpeg.h:369
static void cuvid_uninit(AVCodecContext *avctx)
Definition: ffmpeg_cuvid.c:24
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2279
enum AVPixelFormat sw_format
The pixel format identifying the actual data layout of the hardware frames.
Definition: hwcontext.h:220
enum AVPixelFormat sw_pix_fmt
Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:3005
void * opaque
Private data of the user, can be used to carry app specific stuff.
Definition: avcodec.h:1530