2
* Copyright (c) 2010, Google, Inc.
4
* This file is part of Libav.
6
* Libav is free software; you can redistribute it and/or
7
* modify it under the terms of the GNU Lesser General Public
8
* License as published by the Free Software Foundation; either
9
* version 2.1 of the License, or (at your option) any later version.
11
* Libav is distributed in the hope that it will be useful,
12
* but WITHOUT ANY WARRANTY; without even the implied warranty of
13
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14
* Lesser General Public License for more details.
16
* You should have received a copy of the GNU Lesser General Public
17
* License along with Libav; if not, write to the Free Software
18
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23
* VP8 decoder support via libvpx
26
#define VPX_CODEC_DISABLE_COMPAT 1
27
#include <vpx/vpx_decoder.h>
28
#include <vpx/vp8dx.h>
30
#include "libavutil/imgutils.h"
33
typedef struct VP8DecoderContext {
34
struct vpx_codec_ctx decoder;
37
static av_cold int vp8_init(AVCodecContext *avctx)
39
VP8Context *ctx = avctx->priv_data;
40
const struct vpx_codec_iface *iface = &vpx_codec_vp8_dx_algo;
41
struct vpx_codec_dec_cfg deccfg = {
42
/* token partitions+1 would be a decent choice */
43
.threads = FFMIN(avctx->thread_count, 16)
46
av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
47
av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
49
if (vpx_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != VPX_CODEC_OK) {
50
const char *error = vpx_codec_error(&ctx->decoder);
51
av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
53
return AVERROR(EINVAL);
56
avctx->pix_fmt = PIX_FMT_YUV420P;
60
static int vp8_decode(AVCodecContext *avctx,
61
void *data, int *data_size, AVPacket *avpkt)
63
VP8Context *ctx = avctx->priv_data;
64
AVFrame *picture = data;
65
const void *iter = NULL;
66
struct vpx_image *img;
68
if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
70
const char *error = vpx_codec_error(&ctx->decoder);
71
const char *detail = vpx_codec_error_detail(&ctx->decoder);
73
av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
75
av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n",
77
return AVERROR_INVALIDDATA;
80
if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) {
81
if (img->fmt != VPX_IMG_FMT_I420) {
82
av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d)\n",
84
return AVERROR_INVALIDDATA;
87
if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
88
av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
89
avctx->width, avctx->height, img->d_w, img->d_h);
90
if (av_image_check_size(img->d_w, img->d_h, 0, avctx))
91
return AVERROR_INVALIDDATA;
92
avcodec_set_dimensions(avctx, img->d_w, img->d_h);
94
picture->data[0] = img->planes[0];
95
picture->data[1] = img->planes[1];
96
picture->data[2] = img->planes[2];
97
picture->data[3] = NULL;
98
picture->linesize[0] = img->stride[0];
99
picture->linesize[1] = img->stride[1];
100
picture->linesize[2] = img->stride[2];
101
picture->linesize[3] = 0;
102
*data_size = sizeof(AVPicture);
107
static av_cold int vp8_free(AVCodecContext *avctx)
109
VP8Context *ctx = avctx->priv_data;
110
vpx_codec_destroy(&ctx->decoder);
114
AVCodec ff_libvpx_decoder = {
116
.type = AVMEDIA_TYPE_VIDEO,
118
.priv_data_size = sizeof(VP8Context),
121
.decode = vp8_decode,
122
.capabilities = CODEC_CAP_AUTO_THREADS,
123
.long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),