Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / libvpxdec.c
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1/*
2 * Copyright (c) 2010, Google, Inc.
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21/**
22 * @file
23 * VP8 decoder support via libvpx
24 */
25
26#define VPX_CODEC_DISABLE_COMPAT 1
27#include <vpx/vpx_decoder.h>
28#include <vpx/vp8dx.h>
29
30#include "libavutil/common.h"
31#include "libavutil/imgutils.h"
32#include "avcodec.h"
33#include "internal.h"
34#include "libvpx.h"
35
36typedef struct VP8DecoderContext {
37 struct vpx_codec_ctx decoder;
38} VP8Context;
39
40static av_cold int vpx_init(AVCodecContext *avctx,
41 const struct vpx_codec_iface *iface)
42{
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)
47 };
48
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());
51
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",
55 error);
56 return AVERROR(EINVAL);
57 }
58
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59 return 0;
60}
61
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62// returns 0 on success, AVERROR_INVALIDDATA otherwise
63static int set_pix_fmt(AVCodecContext *avctx, struct vpx_image *img) {
64 if (avctx->codec_id == AV_CODEC_ID_VP8 && img->fmt != VPX_IMG_FMT_I420)
65 return AVERROR_INVALIDDATA;
66 switch (img->fmt) {
67 case VPX_IMG_FMT_I420:
68 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
69 return 0;
70#if CONFIG_LIBVPX_VP9_DECODER
71 case VPX_IMG_FMT_I422:
72 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
73 return 0;
74 case VPX_IMG_FMT_I444:
75 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
76 return 0;
77#ifdef VPX_IMG_FMT_HIGHBITDEPTH
78 case VPX_IMG_FMT_I42016:
79 if (img->bit_depth == 10) {
80 avctx->pix_fmt = AV_PIX_FMT_YUV420P10LE;
81 return 0;
82 } else if (img->bit_depth == 12) {
83 avctx->pix_fmt = AV_PIX_FMT_YUV420P12LE;
84 return 0;
85 } else {
86 return AVERROR_INVALIDDATA;
87 }
88 case VPX_IMG_FMT_I42216:
89 if (img->bit_depth == 10) {
90 avctx->pix_fmt = AV_PIX_FMT_YUV422P10LE;
91 return 0;
92 } else if (img->bit_depth == 12) {
93 avctx->pix_fmt = AV_PIX_FMT_YUV422P12LE;
94 return 0;
95 } else {
96 return AVERROR_INVALIDDATA;
97 }
98 case VPX_IMG_FMT_I44416:
99 if (img->bit_depth == 10) {
100 avctx->pix_fmt = AV_PIX_FMT_YUV444P10LE;
101 return 0;
102 } else if (img->bit_depth == 12) {
103 avctx->pix_fmt = AV_PIX_FMT_YUV444P12LE;
104 return 0;
105 } else {
106 return AVERROR_INVALIDDATA;
107 }
108#endif
109#endif
110 default:
111 return AVERROR_INVALIDDATA;
112 }
113}
114
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115static int vp8_decode(AVCodecContext *avctx,
116 void *data, int *got_frame, AVPacket *avpkt)
117{
118 VP8Context *ctx = avctx->priv_data;
119 AVFrame *picture = data;
120 const void *iter = NULL;
121 struct vpx_image *img;
122 int ret;
123
124 if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
125 VPX_CODEC_OK) {
126 const char *error = vpx_codec_error(&ctx->decoder);
127 const char *detail = vpx_codec_error_detail(&ctx->decoder);
128
129 av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
130 if (detail)
131 av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n",
132 detail);
133 return AVERROR_INVALIDDATA;
134 }
135
136 if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) {
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137 if ((ret = set_pix_fmt(avctx, img)) < 0) {
138#ifdef VPX_IMG_FMT_HIGHBITDEPTH
139 av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d) / bit_depth (%d)\n",
140 img->fmt, img->bit_depth);
141#else
142 av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d) / bit_depth (%d)\n",
143 img->fmt, 8);
144#endif
145 return ret;
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146 }
147
148 if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
149 av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
150 avctx->width, avctx->height, img->d_w, img->d_h);
151 ret = ff_set_dimensions(avctx, img->d_w, img->d_h);
152 if (ret < 0)
153 return ret;
154 }
155 if ((ret = ff_get_buffer(avctx, picture, 0)) < 0)
156 return ret;
157 av_image_copy(picture->data, picture->linesize, (const uint8_t **)img->planes,
158 img->stride, avctx->pix_fmt, img->d_w, img->d_h);
159 *got_frame = 1;
160 }
161 return avpkt->size;
162}
163
164static av_cold int vp8_free(AVCodecContext *avctx)
165{
166 VP8Context *ctx = avctx->priv_data;
167 vpx_codec_destroy(&ctx->decoder);
168 return 0;
169}
170
171#if CONFIG_LIBVPX_VP8_DECODER
172static av_cold int vp8_init(AVCodecContext *avctx)
173{
174 return vpx_init(avctx, &vpx_codec_vp8_dx_algo);
175}
176
177AVCodec ff_libvpx_vp8_decoder = {
178 .name = "libvpx",
179 .long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),
180 .type = AVMEDIA_TYPE_VIDEO,
181 .id = AV_CODEC_ID_VP8,
182 .priv_data_size = sizeof(VP8Context),
183 .init = vp8_init,
184 .close = vp8_free,
185 .decode = vp8_decode,
186 .capabilities = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1,
187};
188#endif /* CONFIG_LIBVPX_VP8_DECODER */
189
190#if CONFIG_LIBVPX_VP9_DECODER
191static av_cold int vp9_init(AVCodecContext *avctx)
192{
193 return vpx_init(avctx, &vpx_codec_vp9_dx_algo);
194}
195
196AVCodec ff_libvpx_vp9_decoder = {
197 .name = "libvpx-vp9",
198 .long_name = NULL_IF_CONFIG_SMALL("libvpx VP9"),
199 .type = AVMEDIA_TYPE_VIDEO,
200 .id = AV_CODEC_ID_VP9,
201 .priv_data_size = sizeof(VP8Context),
202 .init = vp9_init,
203 .close = vp8_free,
204 .decode = vp8_decode,
205 .capabilities = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1,
206 .init_static_data = ff_vp9_init_static,
207};
208#endif /* CONFIG_LIBVPX_VP9_DECODER */