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/common.h"
31 #include "libavutil/imgutils.h"
36 typedef struct VP8DecoderContext {
37 struct vpx_codec_ctx decoder;
40 static av_cold int vpx_init(AVCodecContext *avctx,
41 const struct vpx_codec_iface *iface)
43 VP8Context *ctx = avctx->priv_data;
44 struct vpx_codec_dec_cfg deccfg = {
45 /* token partitions+1 would be a decent choice */
46 .threads = FFMIN(avctx->thread_count, 16)
49 av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
50 av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
52 if (vpx_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != VPX_CODEC_OK) {
53 const char *error = vpx_codec_error(&ctx->decoder);
54 av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
56 return AVERROR(EINVAL);
59 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
63 static int vp8_decode(AVCodecContext *avctx,
64 void *data, int *got_frame, AVPacket *avpkt)
66 VP8Context *ctx = avctx->priv_data;
67 AVFrame *picture = data;
68 const void *iter = NULL;
69 struct vpx_image *img;
72 if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
74 const char *error = vpx_codec_error(&ctx->decoder);
75 const char *detail = vpx_codec_error_detail(&ctx->decoder);
77 av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
79 av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n",
81 return AVERROR_INVALIDDATA;
84 if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) {
85 if (img->fmt != VPX_IMG_FMT_I420) {
86 av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d)\n",
88 return AVERROR_INVALIDDATA;
91 if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
92 av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
93 avctx->width, avctx->height, img->d_w, img->d_h);
94 ret = ff_set_dimensions(avctx, img->d_w, img->d_h);
98 if ((ret = ff_get_buffer(avctx, picture, 0)) < 0)
100 av_image_copy(picture->data, picture->linesize, (const uint8_t **)img->planes,
101 img->stride, avctx->pix_fmt, img->d_w, img->d_h);
107 static av_cold int vp8_free(AVCodecContext *avctx)
109 VP8Context *ctx = avctx->priv_data;
110 vpx_codec_destroy(&ctx->decoder);
114 #if CONFIG_LIBVPX_VP8_DECODER
115 static av_cold int vp8_init(AVCodecContext *avctx)
117 return vpx_init(avctx, &vpx_codec_vp8_dx_algo);
120 AVCodec ff_libvpx_vp8_decoder = {
122 .long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),
123 .type = AVMEDIA_TYPE_VIDEO,
124 .id = AV_CODEC_ID_VP8,
125 .priv_data_size = sizeof(VP8Context),
128 .decode = vp8_decode,
129 .capabilities = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1,
131 #endif /* CONFIG_LIBVPX_VP8_DECODER */
133 #if CONFIG_LIBVPX_VP9_DECODER
134 static av_cold int vp9_init(AVCodecContext *avctx)
136 return vpx_init(avctx, &vpx_codec_vp9_dx_algo);
139 AVCodec ff_libvpx_vp9_decoder = {
140 .name = "libvpx-vp9",
141 .long_name = NULL_IF_CONFIG_SMALL("libvpx VP9"),
142 .type = AVMEDIA_TYPE_VIDEO,
143 .id = AV_CODEC_ID_VP9,
144 .priv_data_size = sizeof(VP8Context),
147 .decode = vp8_decode,
148 .capabilities = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1,
149 .init_static_data = ff_vp9_init_static,
151 #endif /* CONFIG_LIBVPX_VP9_DECODER */