Add ff_ prefix to data symbols of encoders, decoders, hwaccel, parsers, bsf.
[libav.git] / 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
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27#include <vpx/vpx_decoder.h>
28#include <vpx/vp8dx.h>
8299a7f8 29
18b95d85 30#include "libavcore/imgutils.h"
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31#include "avcodec.h"
32
33typedef struct VP8DecoderContext {
34 struct vpx_codec_ctx decoder;
35} VP8Context;
36
37static av_cold int vp8_init(AVCodecContext *avctx)
38{
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)
44 };
45
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());
48
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",
52 error);
53 return AVERROR(EINVAL);
54 }
55
56 avctx->pix_fmt = PIX_FMT_YUV420P;
57 return 0;
58}
59
60static int vp8_decode(AVCodecContext *avctx,
61 void *data, int *data_size, AVPacket *avpkt)
62{
63 VP8Context *ctx = avctx->priv_data;
64 AVFrame *picture = data;
65 const void *iter = NULL;
66 struct vpx_image *img;
67
68 if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
69 VPX_CODEC_OK) {
70 const char *error = vpx_codec_error(&ctx->decoder);
71 const char *detail = vpx_codec_error_detail(&ctx->decoder);
72
73 av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
74 if (detail)
75 av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n",
76 detail);
77 return AVERROR_INVALIDDATA;
78 }
79
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",
83 img->fmt);
84 return AVERROR_INVALIDDATA;
85 }
86
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);
e16f217c 90 if (av_image_check_size(img->d_w, img->d_h, 0, avctx))
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91 return AVERROR_INVALIDDATA;
92 avcodec_set_dimensions(avctx, img->d_w, img->d_h);
93 }
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);
103 }
104 return avpkt->size;
105}
106
107static av_cold int vp8_free(AVCodecContext *avctx)
108{
109 VP8Context *ctx = avctx->priv_data;
110 vpx_codec_destroy(&ctx->decoder);
111 return 0;
112}
113
d36beb3f 114AVCodec ff_libvpx_decoder = {
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115 "libvpx",
116 AVMEDIA_TYPE_VIDEO,
117 CODEC_ID_VP8,
118 sizeof(VP8Context),
119 vp8_init,
120 NULL, /* encode */
121 vp8_free,
122 vp8_decode,
123 0, /* capabilities */
124 .long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),
125};