FFmpeg  4.4
nvdec_vp8.c
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1 /*
2  * VP8 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 "nvdec.h"
25 #include "decode.h"
26 #include "internal.h"
27 #include "vp8.h"
28 
29 static unsigned char safe_get_ref_idx(VP8Frame *frame)
30 {
31  return frame ? ff_nvdec_get_ref_idx(frame->tf.f) : 255;
32 }
33 
34 static int nvdec_vp8_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
35 {
36  VP8Context *h = avctx->priv_data;
37 
39  CUVIDPICPARAMS *pp = &ctx->pic_params;
40  FrameDecodeData *fdd;
41  NVDECFrame *cf;
42  AVFrame *cur_frame = h->framep[VP56_FRAME_CURRENT]->tf.f;
43 
44  int ret;
45 
46  ret = ff_nvdec_start_frame(avctx, cur_frame);
47  if (ret < 0)
48  return ret;
49 
50  fdd = (FrameDecodeData*)cur_frame->private_ref->data;
51  cf = (NVDECFrame*)fdd->hwaccel_priv;
52 
53  *pp = (CUVIDPICPARAMS) {
54  .PicWidthInMbs = (cur_frame->width + 15) / 16,
55  .FrameHeightInMbs = (cur_frame->height + 15) / 16,
56  .CurrPicIdx = cf->idx,
57 
58  .CodecSpecific.vp8 = {
59  .width = cur_frame->width,
60  .height = cur_frame->height,
61 
62  .first_partition_size = h->header_partition_size,
63 
64  .LastRefIdx = safe_get_ref_idx(h->framep[VP56_FRAME_PREVIOUS]),
65  .GoldenRefIdx = safe_get_ref_idx(h->framep[VP56_FRAME_GOLDEN]),
66  .AltRefIdx = safe_get_ref_idx(h->framep[VP56_FRAME_GOLDEN2]),
67  /*
68  * Explicit braces for anonymous inners and unnamed fields
69  * to work around limitations in ancient versions of gcc.
70  */
71  { // union
72  { // struct
73  !h->keyframe, // frame_type
74  h->profile, // version
75  !h->invisible, // show_frame
76  h->segmentation.enabled ? // update_mb_segmentation_data
77  h->segmentation.update_feature_data : 0,
78  }
79  }
80  }
81  };
82 
83  return 0;
84 }
85 
87  AVBufferRef *hw_frames_ctx)
88 {
89  // VP8 uses a fixed size pool of 3 possible reference frames
90  return ff_nvdec_frame_params(avctx, hw_frames_ctx, 3, 0);
91 }
92 
94  .name = "vp8_nvdec",
95  .type = AVMEDIA_TYPE_VIDEO,
96  .id = AV_CODEC_ID_VP8,
97  .pix_fmt = AV_PIX_FMT_CUDA,
98  .start_frame = nvdec_vp8_start_frame,
99  .end_frame = ff_nvdec_simple_end_frame,
100  .decode_slice = ff_nvdec_simple_decode_slice,
101  .frame_params = nvdec_vp8_frame_params,
102  .init = ff_nvdec_decode_init,
103  .uninit = ff_nvdec_decode_uninit,
104  .priv_data_size = sizeof(NVDECContext),
105 };
uint8_t
Libavcodec external API header.
static AVFrame * frame
@ AV_CODEC_ID_VP8
Definition: codec_id.h:189
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
common internal API header
int ff_nvdec_frame_params(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx, int dpb_size, int supports_444)
Definition: nvdec.c:695
int ff_nvdec_simple_end_frame(AVCodecContext *avctx)
Definition: nvdec.c:665
int ff_nvdec_simple_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: nvdec.c:673
int ff_nvdec_decode_init(AVCodecContext *avctx)
Definition: nvdec.c:330
int ff_nvdec_get_ref_idx(AVFrame *frame)
Definition: nvdec.c:747
int ff_nvdec_start_frame(AVCodecContext *avctx, AVFrame *frame)
Definition: nvdec.c:559
int ff_nvdec_decode_uninit(AVCodecContext *avctx)
Definition: nvdec.c:262
static int nvdec_vp8_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: nvdec_vp8.c:34
static int nvdec_vp8_frame_params(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx)
Definition: nvdec_vp8.c:86
static unsigned char safe_get_ref_idx(VP8Frame *frame)
Definition: nvdec_vp8.c:29
AVHWAccel ff_vp8_nvdec_hwaccel
Definition: nvdec_vp8.c:93
@ AV_PIX_FMT_CUDA
HW acceleration through CUDA.
Definition: pixfmt.h:235
static char buffer[20]
Definition: seek.c:32
A reference to a data buffer.
Definition: buffer.h:84
uint8_t * data
The data buffer.
Definition: buffer.h:92
main external API structure.
Definition: avcodec.h:536
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:571
void * priv_data
Definition: avcodec.h:563
void * hwaccel_priv_data
hwaccel-specific private data
Definition: internal.h:175
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
int width
Definition: frame.h:376
int height
Definition: frame.h:376
AVBufferRef * private_ref
AVBufferRef for internal use by a single libav* library.
Definition: frame.h:697
const char * name
Name of the hardware accelerated codec.
Definition: avcodec.h:2444
This struct stores per-frame lavc-internal data and is attached to it via private_ref.
Definition: decode.h:34
void * hwaccel_priv
Per-frame private data for hwaccels.
Definition: decode.h:52
unsigned int idx
Definition: nvdec.h:45
Definition: vp8.h:139
AVFormatContext * ctx
Definition: movenc.c:48
int size
@ VP56_FRAME_GOLDEN2
Definition: vp56.h:47
@ VP56_FRAME_GOLDEN
Definition: vp56.h:46
@ VP56_FRAME_CURRENT
Definition: vp56.h:44
@ VP56_FRAME_PREVIOUS
Definition: vp56.h:45