FFmpeg
nvdec_mjpeg.c
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1 /*
2  * MJPEG HW decode acceleration through NVDEC
3  *
4  * Copyright (c) 2017 Philip Langdale
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "avcodec.h"
24 #include "internal.h"
25 #include "mjpegdec.h"
26 #include "nvdec.h"
27 #include "decode.h"
28 
29 static int nvdec_mjpeg_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
30 {
31  MJpegDecodeContext *s = avctx->priv_data;
32 
34  CUVIDPICPARAMS *pp = &ctx->pic_params;
35  FrameDecodeData *fdd;
36  NVDECFrame *cf;
37  AVFrame *cur_frame = s->picture;
38 
39  int ret;
40 
41  ret = ff_nvdec_start_frame(avctx, cur_frame);
42  if (ret < 0)
43  return ret;
44 
45  fdd = (FrameDecodeData*)cur_frame->private_ref->data;
46  cf = (NVDECFrame*)fdd->hwaccel_priv;
47 
48  *pp = (CUVIDPICPARAMS) {
49  .PicWidthInMbs = (cur_frame->width + 15) / 16,
50  .FrameHeightInMbs = (cur_frame->height + 15) / 16,
51  .CurrPicIdx = cf->idx,
52 
53  .intra_pic_flag = 1,
54  .ref_pic_flag = 0,
55  };
56 
58 }
59 
60 static int nvdec_mjpeg_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
61 {
62  return 0;
63 }
64 
66  AVBufferRef *hw_frames_ctx)
67 {
68  // Only need storage for the current frame
69  return ff_nvdec_frame_params(avctx, hw_frames_ctx, 1, 0);
70 }
71 
72 #if CONFIG_MJPEG_NVDEC_HWACCEL
74  .name = "mjpeg_nvdec",
75  .type = AVMEDIA_TYPE_VIDEO,
76  .id = AV_CODEC_ID_MJPEG,
77  .pix_fmt = AV_PIX_FMT_CUDA,
78  .start_frame = nvdec_mjpeg_start_frame,
79  .end_frame = ff_nvdec_simple_end_frame,
80  .decode_slice = nvdec_mjpeg_decode_slice,
81  .frame_params = nvdec_mjpeg_frame_params,
82  .init = ff_nvdec_decode_init,
83  .uninit = ff_nvdec_decode_uninit,
84  .priv_data_size = sizeof(NVDECContext),
85 };
86 #endif
AV_PIX_FMT_CUDA
@ AV_PIX_FMT_CUDA
HW acceleration through CUDA.
Definition: pixfmt.h:225
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:92
FrameDecodeData
This struct stores per-frame lavc-internal data and is attached to it via private_ref.
Definition: decode.h:34
mjpegdec.h
nvdec_mjpeg_start_frame
static int nvdec_mjpeg_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: nvdec_mjpeg.c:29
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
AVFrame::width
int width
Definition: frame.h:361
internal.h
AVHWAccel
Definition: avcodec.h:2026
ff_nvdec_start_frame
int ff_nvdec_start_frame(AVCodecContext *avctx, AVFrame *frame)
Definition: nvdec.c:559
nvdec_mjpeg_decode_slice
static int nvdec_mjpeg_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: nvdec_mjpeg.c:60
s
#define s(width, name)
Definition: cbs_vp9.c:257
NVDECFrame
Definition: nvdec.h:44
ctx
AVFormatContext * ctx
Definition: movenc.c:48
decode.h
ff_nvdec_simple_end_frame
int ff_nvdec_simple_end_frame(AVCodecContext *avctx)
Definition: nvdec.c:665
nvdec_mjpeg_frame_params
static int nvdec_mjpeg_frame_params(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx)
Definition: nvdec_mjpeg.c:65
ff_nvdec_decode_init
int ff_nvdec_decode_init(AVCodecContext *avctx)
Definition: nvdec.c:330
AVCodecContext::internal
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:419
MJpegDecodeContext
Definition: mjpegdec.h:54
ff_mjpeg_nvdec_hwaccel
const AVHWAccel ff_mjpeg_nvdec_hwaccel
AVCodecInternal::hwaccel_priv_data
void * hwaccel_priv_data
hwaccel-specific private data
Definition: internal.h:182
NVDECFrame::idx
unsigned int idx
Definition: nvdec.h:45
size
int size
Definition: twinvq_data.h:10344
nvdec.h
ff_nvdec_decode_uninit
int ff_nvdec_decode_uninit(AVCodecContext *avctx)
Definition: nvdec.c:262
AVFrame::private_ref
AVBufferRef * private_ref
AVBufferRef for internal use by a single libav* library.
Definition: frame.h:647
AVHWAccel::name
const char * name
Name of the hardware accelerated codec.
Definition: avcodec.h:2032
AV_CODEC_ID_MJPEG
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:57
avcodec.h
ret
ret
Definition: filter_design.txt:187
AVCodecContext
main external API structure.
Definition: avcodec.h:384
AVFrame::height
int height
Definition: frame.h:361
ff_nvdec_simple_decode_slice
int ff_nvdec_simple_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: nvdec.c:673
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
ff_nvdec_frame_params
int ff_nvdec_frame_params(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx, int dpb_size, int supports_444)
Definition: nvdec.c:695
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:84
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:411
FrameDecodeData::hwaccel_priv
void * hwaccel_priv
Per-frame private data for hwaccels.
Definition: decode.h:52
NVDECContext
Definition: nvdec.h:52