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
safe_get_ref_idx(VP8Frame * frame)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
nvdec_vp8_start_frame(AVCodecContext * avctx,const uint8_t * buffer,uint32_t size)34 static int nvdec_vp8_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
35 {
36 VP8Context *h = avctx->priv_data;
37
38 NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
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
nvdec_vp8_frame_params(AVCodecContext * avctx,AVBufferRef * hw_frames_ctx)86 static int nvdec_vp8_frame_params(AVCodecContext *avctx,
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
93 AVHWAccel ff_vp8_nvdec_hwaccel = {
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 };
106