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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 | ||
36 | typedef struct VP8DecoderContext { | |
37 | struct vpx_codec_ctx decoder; | |
38 | } VP8Context; | |
39 | ||
40 | static 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 | ||
59 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; | |
60 | return 0; | |
61 | } | |
62 | ||
63 | static int vp8_decode(AVCodecContext *avctx, | |
64 | void *data, int *got_frame, AVPacket *avpkt) | |
65 | { | |
66 | VP8Context *ctx = avctx->priv_data; | |
67 | AVFrame *picture = data; | |
68 | const void *iter = NULL; | |
69 | struct vpx_image *img; | |
70 | int ret; | |
71 | ||
72 | if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) != | |
73 | VPX_CODEC_OK) { | |
74 | const char *error = vpx_codec_error(&ctx->decoder); | |
75 | const char *detail = vpx_codec_error_detail(&ctx->decoder); | |
76 | ||
77 | av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error); | |
78 | if (detail) | |
79 | av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n", | |
80 | detail); | |
81 | return AVERROR_INVALIDDATA; | |
82 | } | |
83 | ||
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", | |
87 | img->fmt); | |
88 | return AVERROR_INVALIDDATA; | |
89 | } | |
90 | ||
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); | |
95 | if (ret < 0) | |
96 | return ret; | |
97 | } | |
98 | if ((ret = ff_get_buffer(avctx, picture, 0)) < 0) | |
99 | return ret; | |
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); | |
102 | *got_frame = 1; | |
103 | } | |
104 | return avpkt->size; | |
105 | } | |
106 | ||
107 | static 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 | ||
114 | #if CONFIG_LIBVPX_VP8_DECODER | |
115 | static av_cold int vp8_init(AVCodecContext *avctx) | |
116 | { | |
117 | return vpx_init(avctx, &vpx_codec_vp8_dx_algo); | |
118 | } | |
119 | ||
120 | AVCodec ff_libvpx_vp8_decoder = { | |
121 | .name = "libvpx", | |
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), | |
126 | .init = vp8_init, | |
127 | .close = vp8_free, | |
128 | .decode = vp8_decode, | |
129 | .capabilities = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1, | |
130 | }; | |
131 | #endif /* CONFIG_LIBVPX_VP8_DECODER */ | |
132 | ||
133 | #if CONFIG_LIBVPX_VP9_DECODER | |
134 | static av_cold int vp9_init(AVCodecContext *avctx) | |
135 | { | |
136 | return vpx_init(avctx, &vpx_codec_vp9_dx_algo); | |
137 | } | |
138 | ||
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), | |
145 | .init = vp9_init, | |
146 | .close = vp8_free, | |
147 | .decode = vp8_decode, | |
148 | .capabilities = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1, | |
149 | .init_static_data = ff_vp9_init_static, | |
150 | }; | |
151 | #endif /* CONFIG_LIBVPX_VP9_DECODER */ |