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>
32 typedef struct VP8DecoderContext {
33 struct vpx_codec_ctx decoder;
36 static av_cold int vp8_init(AVCodecContext *avctx)
38 VP8Context *ctx = avctx->priv_data;
39 const struct vpx_codec_iface *iface = &vpx_codec_vp8_dx_algo;
40 struct vpx_codec_dec_cfg deccfg = {
41 /* token partitions+1 would be a decent choice */
42 .threads = FFMIN(avctx->thread_count, 16)
45 av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
46 av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
48 if (vpx_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != VPX_CODEC_OK) {
49 const char *error = vpx_codec_error(&ctx->decoder);
50 av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
52 return AVERROR(EINVAL);
55 avctx->pix_fmt = PIX_FMT_YUV420P;
59 static int vp8_decode(AVCodecContext *avctx,
60 void *data, int *data_size, AVPacket *avpkt)
62 VP8Context *ctx = avctx->priv_data;
63 AVFrame *picture = data;
64 const void *iter = NULL;
65 struct vpx_image *img;
67 if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
69 const char *error = vpx_codec_error(&ctx->decoder);
70 const char *detail = vpx_codec_error_detail(&ctx->decoder);
72 av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
74 av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n",
76 return AVERROR_INVALIDDATA;
79 if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) {
80 if (img->fmt != VPX_IMG_FMT_I420) {
81 av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d)\n",
83 return AVERROR_INVALIDDATA;
86 if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
87 av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
88 avctx->width, avctx->height, img->d_w, img->d_h);
89 if (avcodec_check_dimensions(avctx, img->d_w, img->d_h))
90 return AVERROR_INVALIDDATA;
91 avcodec_set_dimensions(avctx, img->d_w, img->d_h);
93 picture->data[0] = img->planes[0];
94 picture->data[1] = img->planes[1];
95 picture->data[2] = img->planes[2];
96 picture->data[3] = NULL;
97 picture->linesize[0] = img->stride[0];
98 picture->linesize[1] = img->stride[1];
99 picture->linesize[2] = img->stride[2];
100 picture->linesize[3] = 0;
101 *data_size = sizeof(AVPicture);
106 static av_cold int vp8_free(AVCodecContext *avctx)
108 VP8Context *ctx = avctx->priv_data;
109 vpx_codec_destroy(&ctx->decoder);
113 AVCodec libvpx_decoder = {
122 0, /* capabilities */
123 .long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),