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 * VP8/9 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 "libavutil/intreadwrite.h"
33 #include "avcodec.h"
34 #include "internal.h"
35 #include "libvpx.h"
36 #include "profiles.h"
37
38 typedef struct VPxDecoderContext {
39 struct vpx_codec_ctx decoder;
40 struct vpx_codec_ctx decoder_alpha;
41 int has_alpha_channel;
42 } VPxContext;
43
vpx_init(AVCodecContext * avctx,const struct vpx_codec_iface * iface,int is_alpha_decoder)44 static av_cold int vpx_init(AVCodecContext *avctx,
45 const struct vpx_codec_iface *iface,
46 int is_alpha_decoder)
47 {
48 VPxContext *ctx = avctx->priv_data;
49 struct vpx_codec_dec_cfg deccfg = {
50 .threads = FFMIN(avctx->thread_count ? avctx->thread_count : av_cpu_count(), 16)
51 };
52
53 av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
54 av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
55
56 if (vpx_codec_dec_init(
57 is_alpha_decoder ? &ctx->decoder_alpha : &ctx->decoder,
58 iface, &deccfg, 0) != VPX_CODEC_OK) {
59 const char *error = vpx_codec_error(&ctx->decoder);
60 av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
61 error);
62 return AVERROR(EINVAL);
63 }
64
65 return 0;
66 }
67
68 // returns 0 on success, AVERROR_INVALIDDATA otherwise
set_pix_fmt(AVCodecContext * avctx,struct vpx_image * img,int has_alpha_channel)69 static int set_pix_fmt(AVCodecContext *avctx, struct vpx_image *img,
70 int has_alpha_channel)
71 {
72 static const enum AVColorSpace colorspaces[8] = {
73 AVCOL_SPC_UNSPECIFIED, AVCOL_SPC_BT470BG, AVCOL_SPC_BT709, AVCOL_SPC_SMPTE170M,
74 AVCOL_SPC_SMPTE240M, AVCOL_SPC_BT2020_NCL, AVCOL_SPC_RESERVED, AVCOL_SPC_RGB,
75 };
76 #if VPX_IMAGE_ABI_VERSION >= 4
77 static const enum AVColorRange color_ranges[] = {
78 AVCOL_RANGE_MPEG, AVCOL_RANGE_JPEG
79 };
80 avctx->color_range = color_ranges[img->range];
81 #endif
82 avctx->colorspace = colorspaces[img->cs];
83 if (avctx->codec_id == AV_CODEC_ID_VP8 && img->fmt != VPX_IMG_FMT_I420)
84 return AVERROR_INVALIDDATA;
85 switch (img->fmt) {
86 case VPX_IMG_FMT_I420:
87 if (avctx->codec_id == AV_CODEC_ID_VP9)
88 avctx->profile = FF_PROFILE_VP9_0;
89 avctx->pix_fmt =
90 has_alpha_channel ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P;
91 return 0;
92 #if CONFIG_LIBVPX_VP9_DECODER
93 case VPX_IMG_FMT_I422:
94 avctx->profile = FF_PROFILE_VP9_1;
95 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
96 return 0;
97 case VPX_IMG_FMT_I440:
98 avctx->profile = FF_PROFILE_VP9_1;
99 avctx->pix_fmt = AV_PIX_FMT_YUV440P;
100 return 0;
101 case VPX_IMG_FMT_I444:
102 avctx->profile = FF_PROFILE_VP9_1;
103 avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ?
104 AV_PIX_FMT_GBRP : AV_PIX_FMT_YUV444P;
105 return 0;
106 case VPX_IMG_FMT_I42016:
107 avctx->profile = FF_PROFILE_VP9_2;
108 if (img->bit_depth == 10) {
109 avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
110 return 0;
111 } else if (img->bit_depth == 12) {
112 avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
113 return 0;
114 } else {
115 return AVERROR_INVALIDDATA;
116 }
117 case VPX_IMG_FMT_I42216:
118 avctx->profile = FF_PROFILE_VP9_3;
119 if (img->bit_depth == 10) {
120 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
121 return 0;
122 } else if (img->bit_depth == 12) {
123 avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
124 return 0;
125 } else {
126 return AVERROR_INVALIDDATA;
127 }
128 case VPX_IMG_FMT_I44016:
129 avctx->profile = FF_PROFILE_VP9_3;
130 if (img->bit_depth == 10) {
131 avctx->pix_fmt = AV_PIX_FMT_YUV440P10;
132 return 0;
133 } else if (img->bit_depth == 12) {
134 avctx->pix_fmt = AV_PIX_FMT_YUV440P12;
135 return 0;
136 } else {
137 return AVERROR_INVALIDDATA;
138 }
139 case VPX_IMG_FMT_I44416:
140 avctx->profile = FF_PROFILE_VP9_3;
141 if (img->bit_depth == 10) {
142 avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ?
143 AV_PIX_FMT_GBRP10 : AV_PIX_FMT_YUV444P10;
144 return 0;
145 } else if (img->bit_depth == 12) {
146 avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ?
147 AV_PIX_FMT_GBRP12 : AV_PIX_FMT_YUV444P12;
148 return 0;
149 } else {
150 return AVERROR_INVALIDDATA;
151 }
152 #endif
153 default:
154 return AVERROR_INVALIDDATA;
155 }
156 }
157
decode_frame(AVCodecContext * avctx,vpx_codec_ctx_t * decoder,uint8_t * data,uint32_t data_sz)158 static int decode_frame(AVCodecContext *avctx, vpx_codec_ctx_t *decoder,
159 uint8_t *data, uint32_t data_sz)
160 {
161 if (vpx_codec_decode(decoder, data, data_sz, NULL, 0) != VPX_CODEC_OK) {
162 const char *error = vpx_codec_error(decoder);
163 const char *detail = vpx_codec_error_detail(decoder);
164
165 av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
166 if (detail) {
167 av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n",
168 detail);
169 }
170 return AVERROR_INVALIDDATA;
171 }
172 return 0;
173 }
174
vpx_decode(AVCodecContext * avctx,void * data,int * got_frame,AVPacket * avpkt)175 static int vpx_decode(AVCodecContext *avctx,
176 void *data, int *got_frame, AVPacket *avpkt)
177 {
178 VPxContext *ctx = avctx->priv_data;
179 AVFrame *picture = data;
180 const void *iter = NULL;
181 const void *iter_alpha = NULL;
182 struct vpx_image *img, *img_alpha;
183 int ret;
184 uint8_t *side_data = NULL;
185 int side_data_size = 0;
186
187 ret = decode_frame(avctx, &ctx->decoder, avpkt->data, avpkt->size);
188 if (ret)
189 return ret;
190
191 side_data = av_packet_get_side_data(avpkt,
192 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
193 &side_data_size);
194 if (side_data_size > 1) {
195 const uint64_t additional_id = AV_RB64(side_data);
196 side_data += 8;
197 side_data_size -= 8;
198 if (additional_id == 1) { // 1 stands for alpha channel data.
199 if (!ctx->has_alpha_channel) {
200 ctx->has_alpha_channel = 1;
201 ret = vpx_init(avctx,
202 #if CONFIG_LIBVPX_VP8_DECODER && CONFIG_LIBVPX_VP9_DECODER
203 (avctx->codec_id == AV_CODEC_ID_VP8) ?
204 &vpx_codec_vp8_dx_algo : &vpx_codec_vp9_dx_algo,
205 #elif CONFIG_LIBVPX_VP8_DECODER
206 &vpx_codec_vp8_dx_algo,
207 #else
208 &vpx_codec_vp9_dx_algo,
209 #endif
210 1);
211 if (ret)
212 return ret;
213 }
214 ret = decode_frame(avctx, &ctx->decoder_alpha, side_data,
215 side_data_size);
216 if (ret)
217 return ret;
218 }
219 }
220
221 if ((img = vpx_codec_get_frame(&ctx->decoder, &iter)) &&
222 (!ctx->has_alpha_channel ||
223 (img_alpha = vpx_codec_get_frame(&ctx->decoder_alpha, &iter_alpha)))) {
224 uint8_t *planes[4];
225 int linesizes[4];
226
227 if (img->d_w > img->w || img->d_h > img->h) {
228 av_log(avctx, AV_LOG_ERROR, "Display dimensions %dx%d exceed storage %dx%d\n",
229 img->d_w, img->d_h, img->w, img->h);
230 return AVERROR_EXTERNAL;
231 }
232
233 if ((ret = set_pix_fmt(avctx, img, ctx->has_alpha_channel)) < 0) {
234 av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d) / bit_depth (%d)\n",
235 img->fmt, img->bit_depth);
236 return ret;
237 }
238
239 if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
240 av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
241 avctx->width, avctx->height, img->d_w, img->d_h);
242 ret = ff_set_dimensions(avctx, img->d_w, img->d_h);
243 if (ret < 0)
244 return ret;
245 }
246 if ((ret = ff_get_buffer(avctx, picture, 0)) < 0)
247 return ret;
248
249 planes[0] = img->planes[VPX_PLANE_Y];
250 planes[1] = img->planes[VPX_PLANE_U];
251 planes[2] = img->planes[VPX_PLANE_V];
252 planes[3] =
253 ctx->has_alpha_channel ? img_alpha->planes[VPX_PLANE_Y] : NULL;
254 linesizes[0] = img->stride[VPX_PLANE_Y];
255 linesizes[1] = img->stride[VPX_PLANE_U];
256 linesizes[2] = img->stride[VPX_PLANE_V];
257 linesizes[3] =
258 ctx->has_alpha_channel ? img_alpha->stride[VPX_PLANE_Y] : 0;
259 av_image_copy(picture->data, picture->linesize, (const uint8_t**)planes,
260 linesizes, avctx->pix_fmt, img->d_w, img->d_h);
261 *got_frame = 1;
262 }
263 return avpkt->size;
264 }
265
vpx_free(AVCodecContext * avctx)266 static av_cold int vpx_free(AVCodecContext *avctx)
267 {
268 VPxContext *ctx = avctx->priv_data;
269 vpx_codec_destroy(&ctx->decoder);
270 if (ctx->has_alpha_channel)
271 vpx_codec_destroy(&ctx->decoder_alpha);
272 return 0;
273 }
274
275 #if CONFIG_LIBVPX_VP8_DECODER
vp8_init(AVCodecContext * avctx)276 static av_cold int vp8_init(AVCodecContext *avctx)
277 {
278 return vpx_init(avctx, &vpx_codec_vp8_dx_algo, 0);
279 }
280
281 AVCodec ff_libvpx_vp8_decoder = {
282 .name = "libvpx",
283 .long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),
284 .type = AVMEDIA_TYPE_VIDEO,
285 .id = AV_CODEC_ID_VP8,
286 .priv_data_size = sizeof(VPxContext),
287 .init = vp8_init,
288 .close = vpx_free,
289 .decode = vpx_decode,
290 .capabilities = AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_DR1,
291 .wrapper_name = "libvpx",
292 };
293 #endif /* CONFIG_LIBVPX_VP8_DECODER */
294
295 #if CONFIG_LIBVPX_VP9_DECODER
vp9_init(AVCodecContext * avctx)296 static av_cold int vp9_init(AVCodecContext *avctx)
297 {
298 return vpx_init(avctx, &vpx_codec_vp9_dx_algo, 0);
299 }
300
301 AVCodec ff_libvpx_vp9_decoder = {
302 .name = "libvpx-vp9",
303 .long_name = NULL_IF_CONFIG_SMALL("libvpx VP9"),
304 .type = AVMEDIA_TYPE_VIDEO,
305 .id = AV_CODEC_ID_VP9,
306 .priv_data_size = sizeof(VPxContext),
307 .init = vp9_init,
308 .close = vpx_free,
309 .decode = vpx_decode,
310 .capabilities = AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_DR1,
311 .init_static_data = ff_vp9_init_static,
312 .profiles = NULL_IF_CONFIG_SMALL(ff_vp9_profiles),
313 .wrapper_name = "libvpx",
314 };
315 #endif /* CONFIG_LIBVPX_VP9_DECODER */
316