2 * Copyright (c) 2010, Google, Inc.
4 * This file is part of FFmpeg.
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 .long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),