1/* 2 * AVCodecParameters functions for libavcodec 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 * AVCodecParameters functions for libavcodec. 24 */ 25 26#include <string.h> 27#include "libavutil/mem.h" 28#include "avcodec.h" 29#include "codec_par.h" 30 31static void codec_parameters_reset(AVCodecParameters *par) 32{ 33 av_freep(&par->extradata); 34 av_channel_layout_uninit(&par->ch_layout); 35 36 memset(par, 0, sizeof(*par)); 37 38 par->codec_type = AVMEDIA_TYPE_UNKNOWN; 39 par->codec_id = AV_CODEC_ID_NONE; 40 par->format = -1; 41 par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC; 42 par->field_order = AV_FIELD_UNKNOWN; 43 par->color_range = AVCOL_RANGE_UNSPECIFIED; 44 par->color_primaries = AVCOL_PRI_UNSPECIFIED; 45 par->color_trc = AVCOL_TRC_UNSPECIFIED; 46 par->color_space = AVCOL_SPC_UNSPECIFIED; 47 par->chroma_location = AVCHROMA_LOC_UNSPECIFIED; 48 par->sample_aspect_ratio = (AVRational){ 0, 1 }; 49 par->profile = FF_PROFILE_UNKNOWN; 50 par->level = FF_LEVEL_UNKNOWN; 51} 52 53AVCodecParameters *avcodec_parameters_alloc(void) 54{ 55 AVCodecParameters *par = av_mallocz(sizeof(*par)); 56 57 if (!par) 58 return NULL; 59 codec_parameters_reset(par); 60 return par; 61} 62 63void avcodec_parameters_free(AVCodecParameters **ppar) 64{ 65 AVCodecParameters *par = *ppar; 66 67 if (!par) 68 return; 69 codec_parameters_reset(par); 70 71 av_freep(ppar); 72} 73 74int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src) 75{ 76 int ret; 77 78 codec_parameters_reset(dst); 79 memcpy(dst, src, sizeof(*dst)); 80 81 dst->ch_layout = (AVChannelLayout){0}; 82 dst->extradata = NULL; 83 dst->extradata_size = 0; 84 if (src->extradata) { 85 dst->extradata = av_mallocz(src->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE); 86 if (!dst->extradata) 87 return AVERROR(ENOMEM); 88 memcpy(dst->extradata, src->extradata, src->extradata_size); 89 dst->extradata_size = src->extradata_size; 90 } 91 92 ret = av_channel_layout_copy(&dst->ch_layout, &src->ch_layout); 93 if (ret < 0) 94 return ret; 95 96 return 0; 97} 98 99int avcodec_parameters_from_context(AVCodecParameters *par, 100 const AVCodecContext *codec) 101{ 102 int ret; 103 104 codec_parameters_reset(par); 105 106 par->codec_type = codec->codec_type; 107 par->codec_id = codec->codec_id; 108 par->codec_tag = codec->codec_tag; 109 110 par->bit_rate = codec->bit_rate; 111 par->bits_per_coded_sample = codec->bits_per_coded_sample; 112 par->bits_per_raw_sample = codec->bits_per_raw_sample; 113 par->profile = codec->profile; 114 par->level = codec->level; 115 116 switch (par->codec_type) { 117 case AVMEDIA_TYPE_VIDEO: 118 par->format = codec->pix_fmt; 119 par->width = codec->width; 120 par->height = codec->height; 121 par->field_order = codec->field_order; 122 par->color_range = codec->color_range; 123 par->color_primaries = codec->color_primaries; 124 par->color_trc = codec->color_trc; 125 par->color_space = codec->colorspace; 126 par->chroma_location = codec->chroma_sample_location; 127 par->sample_aspect_ratio = codec->sample_aspect_ratio; 128 par->video_delay = codec->has_b_frames; 129 break; 130 case AVMEDIA_TYPE_AUDIO: 131 par->format = codec->sample_fmt; 132#if FF_API_OLD_CHANNEL_LAYOUT 133FF_DISABLE_DEPRECATION_WARNINGS 134 // if the old/new fields are set inconsistently, prefer the old ones 135 if ((codec->channels && codec->channels != codec->ch_layout.nb_channels) || 136 (codec->channel_layout && (codec->ch_layout.order != AV_CHANNEL_ORDER_NATIVE || 137 codec->ch_layout.u.mask != codec->channel_layout))) { 138 if (codec->channel_layout) 139 av_channel_layout_from_mask(&par->ch_layout, codec->channel_layout); 140 else { 141 par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC; 142 par->ch_layout.nb_channels = codec->channels; 143 } 144FF_ENABLE_DEPRECATION_WARNINGS 145 } else { 146#endif 147 ret = av_channel_layout_copy(&par->ch_layout, &codec->ch_layout); 148 if (ret < 0) 149 return ret; 150#if FF_API_OLD_CHANNEL_LAYOUT 151FF_DISABLE_DEPRECATION_WARNINGS 152 } 153 par->channel_layout = par->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ? 154 par->ch_layout.u.mask : 0; 155 par->channels = par->ch_layout.nb_channels; 156FF_ENABLE_DEPRECATION_WARNINGS 157#endif 158 par->sample_rate = codec->sample_rate; 159 par->block_align = codec->block_align; 160 par->frame_size = codec->frame_size; 161 par->initial_padding = codec->initial_padding; 162 par->trailing_padding = codec->trailing_padding; 163 par->seek_preroll = codec->seek_preroll; 164 break; 165 case AVMEDIA_TYPE_SUBTITLE: 166 par->width = codec->width; 167 par->height = codec->height; 168 break; 169 } 170 171 if (codec->extradata) { 172 par->extradata = av_mallocz(codec->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE); 173 if (!par->extradata) 174 return AVERROR(ENOMEM); 175 memcpy(par->extradata, codec->extradata, codec->extradata_size); 176 par->extradata_size = codec->extradata_size; 177 } 178 179 return 0; 180} 181 182int avcodec_parameters_to_context(AVCodecContext *codec, 183 const AVCodecParameters *par) 184{ 185 int ret; 186 187 codec->codec_type = par->codec_type; 188 codec->codec_id = par->codec_id; 189 codec->codec_tag = par->codec_tag; 190 191 codec->bit_rate = par->bit_rate; 192 codec->bits_per_coded_sample = par->bits_per_coded_sample; 193 codec->bits_per_raw_sample = par->bits_per_raw_sample; 194 codec->profile = par->profile; 195 codec->level = par->level; 196 197 switch (par->codec_type) { 198 case AVMEDIA_TYPE_VIDEO: 199 codec->pix_fmt = par->format; 200 codec->width = par->width; 201 codec->height = par->height; 202 codec->field_order = par->field_order; 203 codec->color_range = par->color_range; 204 codec->color_primaries = par->color_primaries; 205 codec->color_trc = par->color_trc; 206 codec->colorspace = par->color_space; 207 codec->chroma_sample_location = par->chroma_location; 208 codec->sample_aspect_ratio = par->sample_aspect_ratio; 209 codec->has_b_frames = par->video_delay; 210 break; 211 case AVMEDIA_TYPE_AUDIO: 212 codec->sample_fmt = par->format; 213#if FF_API_OLD_CHANNEL_LAYOUT 214FF_DISABLE_DEPRECATION_WARNINGS 215 // if the old/new fields are set inconsistently, prefer the old ones 216 if ((par->channels && par->channels != par->ch_layout.nb_channels) || 217 (par->channel_layout && (par->ch_layout.order != AV_CHANNEL_ORDER_NATIVE || 218 par->ch_layout.u.mask != par->channel_layout))) { 219 if (par->channel_layout) 220 av_channel_layout_from_mask(&codec->ch_layout, par->channel_layout); 221 else { 222 codec->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC; 223 codec->ch_layout.nb_channels = par->channels; 224 } 225FF_ENABLE_DEPRECATION_WARNINGS 226 } else { 227#endif 228 ret = av_channel_layout_copy(&codec->ch_layout, &par->ch_layout); 229 if (ret < 0) 230 return ret; 231#if FF_API_OLD_CHANNEL_LAYOUT 232FF_DISABLE_DEPRECATION_WARNINGS 233 } 234 codec->channel_layout = codec->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ? 235 codec->ch_layout.u.mask : 0; 236 codec->channels = codec->ch_layout.nb_channels; 237FF_ENABLE_DEPRECATION_WARNINGS 238#endif 239 codec->sample_rate = par->sample_rate; 240 codec->block_align = par->block_align; 241 codec->frame_size = par->frame_size; 242 codec->delay = 243 codec->initial_padding = par->initial_padding; 244 codec->trailing_padding = par->trailing_padding; 245 codec->seek_preroll = par->seek_preroll; 246 break; 247 case AVMEDIA_TYPE_SUBTITLE: 248 codec->width = par->width; 249 codec->height = par->height; 250 break; 251 } 252 253 if (par->extradata) { 254 av_freep(&codec->extradata); 255 codec->extradata = av_mallocz(par->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE); 256 if (!codec->extradata) 257 return AVERROR(ENOMEM); 258 memcpy(codec->extradata, par->extradata, par->extradata_size); 259 codec->extradata_size = par->extradata_size; 260 } 261 262 return 0; 263} 264