| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | #ifndef AVCODEC_CODEC_INTERNAL_H | ||
| 20 | #define AVCODEC_CODEC_INTERNAL_H | ||
| 21 | |||
| 22 | #include <stdint.h> | ||
| 23 | |||
| 24 | #include "libavutil/attributes.h" | ||
| 25 | #include "codec.h" | ||
| 26 | #include "config.h" | ||
| 27 | |||
| 28 | /** | ||
| 29 | * The codec is not known to be init-threadsafe (i.e. it might be unsafe | ||
| 30 | * to initialize this codec and another codec concurrently, typically because | ||
| 31 | * the codec calls external APIs that are not known to be thread-safe). | ||
| 32 | * Therefore calling the codec's init function needs to be guarded with a lock. | ||
| 33 | */ | ||
| 34 | #define FF_CODEC_CAP_NOT_INIT_THREADSAFE (1 << 0) | ||
| 35 | /** | ||
| 36 | * The codec allows calling the close function for deallocation even if | ||
| 37 | * the init function returned a failure. Without this capability flag, a | ||
| 38 | * codec does such cleanup internally when returning failures from the | ||
| 39 | * init function and does not expect the close function to be called at | ||
| 40 | * all. | ||
| 41 | */ | ||
| 42 | #define FF_CODEC_CAP_INIT_CLEANUP (1 << 1) | ||
| 43 | /** | ||
| 44 | * Decoders marked with FF_CODEC_CAP_SETS_PKT_DTS want to set | ||
| 45 | * AVFrame.pkt_dts manually. If the flag is set, decode.c won't overwrite | ||
| 46 | * this field. If it's unset, decode.c tries to guess the pkt_dts field | ||
| 47 | * from the input AVPacket. | ||
| 48 | */ | ||
| 49 | #define FF_CODEC_CAP_SETS_PKT_DTS (1 << 2) | ||
| 50 | /** | ||
| 51 | * The decoder extracts and fills its parameters even if the frame is | ||
| 52 | * skipped due to the skip_frame setting. | ||
| 53 | */ | ||
| 54 | #define FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM (1 << 3) | ||
| 55 | /** | ||
| 56 | * The decoder sets the cropping fields in the output frames manually. | ||
| 57 | * If this cap is set, the generic code will initialize output frame | ||
| 58 | * dimensions to coded rather than display values. | ||
| 59 | */ | ||
| 60 | #define FF_CODEC_CAP_EXPORTS_CROPPING (1 << 4) | ||
| 61 | /** | ||
| 62 | * Codec initializes slice-based threading with a main function | ||
| 63 | */ | ||
| 64 | #define FF_CODEC_CAP_SLICE_THREAD_HAS_MF (1 << 5) | ||
| 65 | /** | ||
| 66 | * The decoder might make use of the ProgressFrame API. | ||
| 67 | */ | ||
| 68 | #define FF_CODEC_CAP_USES_PROGRESSFRAMES (1 << 6) | ||
| 69 | /** | ||
| 70 | * Codec handles avctx->thread_count == 0 (auto) internally. | ||
| 71 | */ | ||
| 72 | #define FF_CODEC_CAP_AUTO_THREADS (1 << 7) | ||
| 73 | /** | ||
| 74 | * Codec handles output frame properties internally instead of letting the | ||
| 75 | * internal logic derive them from AVCodecInternal.last_pkt_props. | ||
| 76 | */ | ||
| 77 | #define FF_CODEC_CAP_SETS_FRAME_PROPS (1 << 8) | ||
| 78 | /** | ||
| 79 | * Codec supports embedded ICC profiles (AV_FRAME_DATA_ICC_PROFILE). | ||
| 80 | */ | ||
| 81 | #define FF_CODEC_CAP_ICC_PROFILES (1 << 9) | ||
| 82 | /** | ||
| 83 | * The encoder has AV_CODEC_CAP_DELAY set, but does not actually have delay - it | ||
| 84 | * only wants to be flushed at the end to update some context variables (e.g. | ||
| 85 | * 2pass stats) or produce a trailing packet. Besides that it immediately | ||
| 86 | * produces exactly one output packet per each input frame, just as no-delay | ||
| 87 | * encoders do. | ||
| 88 | */ | ||
| 89 | #define FF_CODEC_CAP_EOF_FLUSH (1 << 10) | ||
| 90 | |||
| 91 | /** | ||
| 92 | * FFCodec.codec_tags termination value | ||
| 93 | */ | ||
| 94 | #define FF_CODEC_TAGS_END -1 | ||
| 95 | |||
| 96 | typedef struct FFCodecDefault { | ||
| 97 | const char *key; | ||
| 98 | const char *value; | ||
| 99 | } FFCodecDefault; | ||
| 100 | |||
| 101 | struct AVCodecContext; | ||
| 102 | struct AVSubtitle; | ||
| 103 | struct AVPacket; | ||
| 104 | enum AVCodecConfig; | ||
| 105 | |||
| 106 | enum FFCodecType { | ||
| 107 | /* The codec is a decoder using the decode callback; | ||
| 108 | * audio and video codecs only. */ | ||
| 109 | FF_CODEC_CB_TYPE_DECODE, | ||
| 110 | /* The codec is a decoder using the decode_sub callback; | ||
| 111 | * subtitle codecs only. */ | ||
| 112 | FF_CODEC_CB_TYPE_DECODE_SUB, | ||
| 113 | /* The codec is a decoder using the receive_frame callback; | ||
| 114 | * audio and video codecs only. */ | ||
| 115 | FF_CODEC_CB_TYPE_RECEIVE_FRAME, | ||
| 116 | /* The codec is an encoder using the encode callback; | ||
| 117 | * audio and video codecs only. */ | ||
| 118 | FF_CODEC_CB_TYPE_ENCODE, | ||
| 119 | /* The codec is an encoder using the encode_sub callback; | ||
| 120 | * subtitle codecs only. */ | ||
| 121 | FF_CODEC_CB_TYPE_ENCODE_SUB, | ||
| 122 | /* The codec is an encoder using the receive_packet callback; | ||
| 123 | * audio and video codecs only. */ | ||
| 124 | FF_CODEC_CB_TYPE_RECEIVE_PACKET, | ||
| 125 | }; | ||
| 126 | |||
| 127 | typedef struct FFCodec { | ||
| 128 | /** | ||
| 129 | * The public AVCodec. See codec.h for it. | ||
| 130 | */ | ||
| 131 | AVCodec p; | ||
| 132 | |||
| 133 | /** | ||
| 134 | * Internal codec capabilities FF_CODEC_CAP_*. | ||
| 135 | */ | ||
| 136 | unsigned caps_internal:26; | ||
| 137 | |||
| 138 | /** | ||
| 139 | * Is this a decoder? | ||
| 140 | */ | ||
| 141 | unsigned is_decoder:1; | ||
| 142 | |||
| 143 | /** | ||
| 144 | * This field determines the video color ranges supported by an encoder. | ||
| 145 | * Should be set to a bitmask of AVCOL_RANGE_MPEG and AVCOL_RANGE_JPEG. | ||
| 146 | */ | ||
| 147 | unsigned color_ranges:2; | ||
| 148 | |||
| 149 | /** | ||
| 150 | * This field determines the type of the codec (decoder/encoder) | ||
| 151 | * and also the exact callback cb implemented by the codec. | ||
| 152 | * cb_type uses enum FFCodecType values. | ||
| 153 | */ | ||
| 154 | unsigned cb_type:3; | ||
| 155 | |||
| 156 | /** | ||
| 157 | * This field determines the alpha modes supported by an encoder. | ||
| 158 | */ | ||
| 159 | const enum AVAlphaMode *alpha_modes; | ||
| 160 | |||
| 161 | int priv_data_size; | ||
| 162 | /** | ||
| 163 | * @name Frame-level threading support functions | ||
| 164 | * @{ | ||
| 165 | */ | ||
| 166 | /** | ||
| 167 | * Copy necessary context variables from a previous thread context to the current one. | ||
| 168 | * If not defined, the next thread will start automatically; otherwise, the codec | ||
| 169 | * must call ff_thread_finish_setup(). | ||
| 170 | * | ||
| 171 | * dst and src will (rarely) point to the same context, in which case memcpy should be skipped. | ||
| 172 | */ | ||
| 173 | int (*update_thread_context)(struct AVCodecContext *dst, const struct AVCodecContext *src); | ||
| 174 | |||
| 175 | /** | ||
| 176 | * Copy variables back to the user-facing context | ||
| 177 | */ | ||
| 178 | int (*update_thread_context_for_user)(struct AVCodecContext *dst, const struct AVCodecContext *src); | ||
| 179 | /** @} */ | ||
| 180 | |||
| 181 | /** | ||
| 182 | * Private codec-specific defaults. | ||
| 183 | */ | ||
| 184 | const FFCodecDefault *defaults; | ||
| 185 | |||
| 186 | int (*init)(struct AVCodecContext *); | ||
| 187 | |||
| 188 | union { | ||
| 189 | /** | ||
| 190 | * Decode to an AVFrame. | ||
| 191 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_DECODE. | ||
| 192 | * | ||
| 193 | * @param avctx codec context | ||
| 194 | * @param[out] frame AVFrame for output | ||
| 195 | * @param[out] got_frame_ptr decoder sets to 0 or 1 to indicate that | ||
| 196 | * a non-empty frame was returned in frame. | ||
| 197 | * @param[in] avpkt AVPacket containing the data to be decoded | ||
| 198 | * @return amount of bytes read from the packet on success, | ||
| 199 | * negative error code on failure | ||
| 200 | */ | ||
| 201 | int (*decode)(struct AVCodecContext *avctx, struct AVFrame *frame, | ||
| 202 | int *got_frame_ptr, struct AVPacket *avpkt); | ||
| 203 | /** | ||
| 204 | * Decode subtitle data to an AVSubtitle. | ||
| 205 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_DECODE_SUB. | ||
| 206 | * | ||
| 207 | * Apart from that this is like the decode callback. | ||
| 208 | */ | ||
| 209 | int (*decode_sub)(struct AVCodecContext *avctx, struct AVSubtitle *sub, | ||
| 210 | int *got_frame_ptr, const struct AVPacket *avpkt); | ||
| 211 | /** | ||
| 212 | * Decode API with decoupled packet/frame dataflow. | ||
| 213 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_RECEIVE_FRAME. | ||
| 214 | * | ||
| 215 | * This function is called to get one output frame. It should call | ||
| 216 | * ff_decode_get_packet() to obtain input data. | ||
| 217 | */ | ||
| 218 | int (*receive_frame)(struct AVCodecContext *avctx, struct AVFrame *frame); | ||
| 219 | /** | ||
| 220 | * Encode data to an AVPacket. | ||
| 221 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_ENCODE | ||
| 222 | * | ||
| 223 | * @param avctx codec context | ||
| 224 | * @param[out] avpkt output AVPacket | ||
| 225 | * @param[in] frame AVFrame containing the input to be encoded | ||
| 226 | * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a | ||
| 227 | * non-empty packet was returned in avpkt. | ||
| 228 | * @return 0 on success, negative error code on failure | ||
| 229 | */ | ||
| 230 | int (*encode)(struct AVCodecContext *avctx, struct AVPacket *avpkt, | ||
| 231 | const struct AVFrame *frame, int *got_packet_ptr); | ||
| 232 | /** | ||
| 233 | * Encode subtitles to a raw buffer. | ||
| 234 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_ENCODE_SUB. | ||
| 235 | */ | ||
| 236 | int (*encode_sub)(struct AVCodecContext *avctx, uint8_t *buf, | ||
| 237 | int buf_size, const struct AVSubtitle *sub); | ||
| 238 | /** | ||
| 239 | * Encode API with decoupled frame/packet dataflow. | ||
| 240 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_RECEIVE_PACKET. | ||
| 241 | * | ||
| 242 | * This function is called to get one output packet. | ||
| 243 | * It should call ff_encode_get_frame() to obtain input data. | ||
| 244 | */ | ||
| 245 | int (*receive_packet)(struct AVCodecContext *avctx, struct AVPacket *avpkt); | ||
| 246 | } cb; | ||
| 247 | |||
| 248 | int (*close)(struct AVCodecContext *); | ||
| 249 | |||
| 250 | /** | ||
| 251 | * Flush buffers. | ||
| 252 | * Will be called when seeking | ||
| 253 | */ | ||
| 254 | void (*flush)(struct AVCodecContext *); | ||
| 255 | |||
| 256 | /** | ||
| 257 | * Decoding only, a comma-separated list of bitstream filters to apply to | ||
| 258 | * packets before decoding. | ||
| 259 | */ | ||
| 260 | const char *bsfs; | ||
| 261 | |||
| 262 | /** | ||
| 263 | * Array of pointers to hardware configurations supported by the codec, | ||
| 264 | * or NULL if no hardware supported. The array is terminated by a NULL | ||
| 265 | * pointer. | ||
| 266 | * | ||
| 267 | * The user can only access this field via avcodec_get_hw_config(). | ||
| 268 | */ | ||
| 269 | const struct AVCodecHWConfigInternal *const *hw_configs; | ||
| 270 | |||
| 271 | /** | ||
| 272 | * List of supported codec_tags, terminated by FF_CODEC_TAGS_END. | ||
| 273 | */ | ||
| 274 | const uint32_t *codec_tags; | ||
| 275 | |||
| 276 | /** | ||
| 277 | * Custom callback for avcodec_get_supported_config(). If absent, | ||
| 278 | * ff_default_get_supported_config() will be used. `out_num_configs` will | ||
| 279 | * always be set to a valid pointer. | ||
| 280 | */ | ||
| 281 | int (*get_supported_config)(const struct AVCodecContext *avctx, | ||
| 282 | const AVCodec *codec, | ||
| 283 | enum AVCodecConfig config, | ||
| 284 | unsigned flags, | ||
| 285 | const void **out_configs, | ||
| 286 | int *out_num_configs); | ||
| 287 | } FFCodec; | ||
| 288 | |||
| 289 | 26205053 | static av_always_inline const FFCodec *ffcodec(const AVCodec *codec) | |
| 290 | { | ||
| 291 | 26205053 | return (const FFCodec*)codec; | |
| 292 | } | ||
| 293 | |||
| 294 | /** | ||
| 295 | * Internal version of av_codec_is_encoder(). Must not be called with | ||
| 296 | * a NULL AVCodec*. | ||
| 297 | */ | ||
| 298 | 6335768 | static inline int ff_codec_is_encoder(const AVCodec *avcodec) | |
| 299 | { | ||
| 300 | 6335768 | const FFCodec *const codec = ffcodec(avcodec); | |
| 301 | 6335768 | return !codec->is_decoder; | |
| 302 | } | ||
| 303 | |||
| 304 | /** | ||
| 305 | * Internal version of av_codec_is_decoder(). Must not be called with | ||
| 306 | * a NULL AVCodec*. | ||
| 307 | */ | ||
| 308 | 11617882 | static inline int ff_codec_is_decoder(const AVCodec *avcodec) | |
| 309 | { | ||
| 310 | 11617882 | const FFCodec *const codec = ffcodec(avcodec); | |
| 311 | 11617882 | return codec->is_decoder; | |
| 312 | } | ||
| 313 | |||
| 314 | /** | ||
| 315 | * Default implementation for avcodec_get_supported_config(). Will return the | ||
| 316 | * relevant fields from AVCodec if present, or NULL otherwise. | ||
| 317 | * | ||
| 318 | * For AVCODEC_CONFIG_COLOR_RANGE, the output will depend on the bitmask in | ||
| 319 | * FFCodec.color_ranges, with a value of 0 returning NULL. | ||
| 320 | */ | ||
| 321 | int ff_default_get_supported_config(const struct AVCodecContext *avctx, | ||
| 322 | const AVCodec *codec, | ||
| 323 | enum AVCodecConfig config, | ||
| 324 | unsigned flags, | ||
| 325 | const void **out_configs, | ||
| 326 | int *out_num_configs); | ||
| 327 | |||
| 328 | #if CONFIG_SMALL | ||
| 329 | #define CODEC_LONG_NAME(str) .p.long_name = NULL | ||
| 330 | #else | ||
| 331 | #define CODEC_LONG_NAME(str) .p.long_name = str | ||
| 332 | #endif | ||
| 333 | |||
| 334 | #if HAVE_THREADS | ||
| 335 | #define UPDATE_THREAD_CONTEXT(func) \ | ||
| 336 | .update_thread_context = (func) | ||
| 337 | #define UPDATE_THREAD_CONTEXT_FOR_USER(func) \ | ||
| 338 | .update_thread_context_for_user = (func) | ||
| 339 | #else | ||
| 340 | #define UPDATE_THREAD_CONTEXT(func) \ | ||
| 341 | .update_thread_context = NULL | ||
| 342 | #define UPDATE_THREAD_CONTEXT_FOR_USER(func) \ | ||
| 343 | .update_thread_context_for_user = NULL | ||
| 344 | #endif | ||
| 345 | |||
| 346 | #define FF_CODEC_DECODE_CB(func) \ | ||
| 347 | .is_decoder = 1, \ | ||
| 348 | .cb_type = FF_CODEC_CB_TYPE_DECODE, \ | ||
| 349 | .cb.decode = (func) | ||
| 350 | #define FF_CODEC_DECODE_SUB_CB(func) \ | ||
| 351 | .is_decoder = 1, \ | ||
| 352 | .cb_type = FF_CODEC_CB_TYPE_DECODE_SUB, \ | ||
| 353 | .cb.decode_sub = (func) | ||
| 354 | #define FF_CODEC_RECEIVE_FRAME_CB(func) \ | ||
| 355 | .is_decoder = 1, \ | ||
| 356 | .cb_type = FF_CODEC_CB_TYPE_RECEIVE_FRAME, \ | ||
| 357 | .cb.receive_frame = (func) | ||
| 358 | #define FF_CODEC_ENCODE_CB(func) \ | ||
| 359 | .is_decoder = 0, \ | ||
| 360 | .cb_type = FF_CODEC_CB_TYPE_ENCODE, \ | ||
| 361 | .cb.encode = (func) | ||
| 362 | #define FF_CODEC_ENCODE_SUB_CB(func) \ | ||
| 363 | .is_decoder = 0, \ | ||
| 364 | .cb_type = FF_CODEC_CB_TYPE_ENCODE_SUB, \ | ||
| 365 | .cb.encode_sub = (func) | ||
| 366 | #define FF_CODEC_RECEIVE_PACKET_CB(func) \ | ||
| 367 | .is_decoder = 0, \ | ||
| 368 | .cb_type = FF_CODEC_CB_TYPE_RECEIVE_PACKET, \ | ||
| 369 | .cb.receive_packet = (func) | ||
| 370 | |||
| 371 | #ifdef __clang__ | ||
| 372 | #define DISABLE_DEPRECATION_WARNINGS FF_DISABLE_DEPRECATION_WARNINGS | ||
| 373 | #define ENABLE_DEPRECATION_WARNINGS FF_ENABLE_DEPRECATION_WARNINGS | ||
| 374 | #else | ||
| 375 | #define DISABLE_DEPRECATION_WARNINGS | ||
| 376 | #define ENABLE_DEPRECATION_WARNINGS | ||
| 377 | #endif | ||
| 378 | |||
| 379 | #define CODEC_CH_LAYOUTS(...) CODEC_CH_LAYOUTS_ARRAY(((const AVChannelLayout[]) { __VA_ARGS__, { 0 } })) | ||
| 380 | #define CODEC_CH_LAYOUTS_ARRAY(array) CODEC_ARRAY(ch_layouts, (array)) | ||
| 381 | |||
| 382 | #define CODEC_SAMPLERATES(...) CODEC_SAMPLERATES_ARRAY(((const int[]) { __VA_ARGS__, 0 })) | ||
| 383 | #define CODEC_SAMPLERATES_ARRAY(array) CODEC_ARRAY(supported_samplerates, (array)) | ||
| 384 | |||
| 385 | #define CODEC_SAMPLEFMTS(...) CODEC_SAMPLEFMTS_ARRAY(((const enum AVSampleFormat[]) { __VA_ARGS__, AV_SAMPLE_FMT_NONE })) | ||
| 386 | #define CODEC_SAMPLEFMTS_ARRAY(array) CODEC_ARRAY(sample_fmts, (array)) | ||
| 387 | |||
| 388 | #define CODEC_FRAMERATES(...) CODEC_FRAMERATES_ARRAY(((const AVRational[]) { __VA_ARGS__, { 0, 0 } })) | ||
| 389 | #define CODEC_FRAMERATES_ARRAY(array) CODEC_ARRAY(supported_framerates, (array)) | ||
| 390 | |||
| 391 | #define CODEC_PIXFMTS(...) CODEC_PIXFMTS_ARRAY(((const enum AVPixelFormat[]) { __VA_ARGS__, AV_PIX_FMT_NONE })) | ||
| 392 | #define CODEC_PIXFMTS_ARRAY(array) CODEC_ARRAY(pix_fmts, (array)) | ||
| 393 | |||
| 394 | #define CODEC_ARRAY(field, array) \ | ||
| 395 | DISABLE_DEPRECATION_WARNINGS \ | ||
| 396 | .p.field = (array) \ | ||
| 397 | ENABLE_DEPRECATION_WARNINGS | ||
| 398 | |||
| 399 | #endif /* AVCODEC_CODEC_INTERNAL_H */ | ||
| 400 |