1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*
* Copyright (c) 2010, Google, Inc.
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* VP8 decoder support via libvpx
*/
#define VPX_CODEC_DISABLE_COMPAT 1
#include <vpx/vpx_decoder.h>
#include <vpx/vp8dx.h>
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
typedef struct VP8DecoderContext {
struct vpx_codec_ctx decoder;
} VP8Context;
static av_cold int vpx_init(AVCodecContext *avctx,
const struct vpx_codec_iface *iface)
{
VP8Context *ctx = avctx->priv_data;
struct vpx_codec_dec_cfg deccfg = {
/* token partitions+1 would be a decent choice */
.threads = FFMIN(avctx->thread_count, 16)
};
av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
if (vpx_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != VPX_CODEC_OK) {
const char *error = vpx_codec_error(&ctx->decoder);
av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
error);
return AVERROR(EINVAL);
}
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
return 0;
}
static int vp8_decode(AVCodecContext *avctx,
void *data, int *got_frame, AVPacket *avpkt)
{
VP8Context *ctx = avctx->priv_data;
AVFrame *picture = data;
const void *iter = NULL;
struct vpx_image *img;
if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
VPX_CODEC_OK) {
const char *error = vpx_codec_error(&ctx->decoder);
const char *detail = vpx_codec_error_detail(&ctx->decoder);
av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
if (detail)
av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n",
detail);
return AVERROR_INVALIDDATA;
}
if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) {
if (img->fmt != VPX_IMG_FMT_I420) {
av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d)\n",
img->fmt);
return AVERROR_INVALIDDATA;
}
if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
avctx->width, avctx->height, img->d_w, img->d_h);
if (av_image_check_size(img->d_w, img->d_h, 0, avctx))
return AVERROR_INVALIDDATA;
avcodec_set_dimensions(avctx, img->d_w, img->d_h);
}
picture->data[0] = img->planes[0];
picture->data[1] = img->planes[1];
picture->data[2] = img->planes[2];
picture->data[3] = NULL;
picture->linesize[0] = img->stride[0];
picture->linesize[1] = img->stride[1];
picture->linesize[2] = img->stride[2];
picture->linesize[3] = 0;
*got_frame = 1;
}
return avpkt->size;
}
static av_cold int vp8_free(AVCodecContext *avctx)
{
VP8Context *ctx = avctx->priv_data;
vpx_codec_destroy(&ctx->decoder);
return 0;
}
#if CONFIG_LIBVPX_VP8_DECODER
static av_cold int vp8_init(AVCodecContext *avctx)
{
return vpx_init(avctx, &vpx_codec_vp8_dx_algo);
}
AVCodec ff_libvpx_vp8_decoder = {
.name = "libvpx",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VP8,
.priv_data_size = sizeof(VP8Context),
.init = vp8_init,
.close = vp8_free,
.decode = vp8_decode,
.capabilities = CODEC_CAP_AUTO_THREADS,
.long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),
};
#endif /* CONFIG_LIBVPX_VP8_DECODER */
#if CONFIG_LIBVPX_VP9_DECODER
static av_cold int vp9_init(AVCodecContext *avctx)
{
return vpx_init(avctx, &vpx_codec_vp9_dx_algo);
}
AVCodec ff_libvpx_vp9_decoder = {
.name = "libvpx-vp9",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VP9,
.priv_data_size = sizeof(VP8Context),
.init = vp9_init,
.close = vp8_free,
.decode = vp8_decode,
.capabilities = CODEC_CAP_AUTO_THREADS | CODEC_CAP_EXPERIMENTAL,
.long_name = NULL_IF_CONFIG_SMALL("libvpx VP9"),
};
#endif /* CONFIG_LIBVPX_VP9_DECODER */
|
