| 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 "avcodec.h" | ||
| 26 | #include "codec.h" | ||
| 27 | #include "config.h" | ||
| 28 | |||
| 29 | /** | ||
| 30 | * The codec is not known to be init-threadsafe (i.e. it might be unsafe | ||
| 31 | * to initialize this codec and another codec concurrently, typically because | ||
| 32 | * the codec calls external APIs that are not known to be thread-safe). | ||
| 33 | * Therefore calling the codec's init function needs to be guarded with a lock. | ||
| 34 | */ | ||
| 35 | #define FF_CODEC_CAP_NOT_INIT_THREADSAFE (1 << 0) | ||
| 36 | /** | ||
| 37 | * The codec allows calling the close function for deallocation even if | ||
| 38 | * the init function returned a failure. Without this capability flag, a | ||
| 39 | * codec does such cleanup internally when returning failures from the | ||
| 40 | * init function and does not expect the close function to be called at | ||
| 41 | * all. | ||
| 42 | */ | ||
| 43 | #define FF_CODEC_CAP_INIT_CLEANUP (1 << 1) | ||
| 44 | /** | ||
| 45 | * Decoders marked with FF_CODEC_CAP_SETS_PKT_DTS want to set | ||
| 46 | * AVFrame.pkt_dts manually. If the flag is set, decode.c won't overwrite | ||
| 47 | * this field. If it's unset, decode.c tries to guess the pkt_dts field | ||
| 48 | * from the input AVPacket. | ||
| 49 | */ | ||
| 50 | #define FF_CODEC_CAP_SETS_PKT_DTS (1 << 2) | ||
| 51 | /** | ||
| 52 | * The decoder extracts and fills its parameters even if the frame is | ||
| 53 | * skipped due to the skip_frame setting. | ||
| 54 | */ | ||
| 55 | #define FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM (1 << 3) | ||
| 56 | /** | ||
| 57 | * The decoder sets the cropping fields in the output frames manually. | ||
| 58 | * If this cap is set, the generic code will initialize output frame | ||
| 59 | * dimensions to coded rather than display values. | ||
| 60 | */ | ||
| 61 | #define FF_CODEC_CAP_EXPORTS_CROPPING (1 << 4) | ||
| 62 | /** | ||
| 63 | * Codec initializes slice-based threading with a main function | ||
| 64 | */ | ||
| 65 | #define FF_CODEC_CAP_SLICE_THREAD_HAS_MF (1 << 5) | ||
| 66 | /** | ||
| 67 | * The decoder might make use of the ProgressFrame API. | ||
| 68 | */ | ||
| 69 | #define FF_CODEC_CAP_USES_PROGRESSFRAMES (1 << 6) | ||
| 70 | /** | ||
| 71 | * Codec handles avctx->thread_count == 0 (auto) internally. | ||
| 72 | */ | ||
| 73 | #define FF_CODEC_CAP_AUTO_THREADS (1 << 7) | ||
| 74 | /** | ||
| 75 | * Codec handles output frame properties internally instead of letting the | ||
| 76 | * internal logic derive them from AVCodecInternal.last_pkt_props. | ||
| 77 | */ | ||
| 78 | #define FF_CODEC_CAP_SETS_FRAME_PROPS (1 << 8) | ||
| 79 | /** | ||
| 80 | * Codec supports embedded ICC profiles (AV_FRAME_DATA_ICC_PROFILE). | ||
| 81 | */ | ||
| 82 | #define FF_CODEC_CAP_ICC_PROFILES (1 << 9) | ||
| 83 | /** | ||
| 84 | * The encoder has AV_CODEC_CAP_DELAY set, but does not actually have delay - it | ||
| 85 | * only wants to be flushed at the end to update some context variables (e.g. | ||
| 86 | * 2pass stats) or produce a trailing packet. Besides that it immediately | ||
| 87 | * produces exactly one output packet per each input frame, just as no-delay | ||
| 88 | * encoders do. | ||
| 89 | */ | ||
| 90 | #define FF_CODEC_CAP_EOF_FLUSH (1 << 10) | ||
| 91 | |||
| 92 | /** | ||
| 93 | * FFCodec.codec_tags termination value | ||
| 94 | */ | ||
| 95 | #define FF_CODEC_TAGS_END -1 | ||
| 96 | |||
| 97 | typedef struct FFCodecDefault { | ||
| 98 | const char *key; | ||
| 99 | const char *value; | ||
| 100 | } FFCodecDefault; | ||
| 101 | |||
| 102 | struct AVCodecContext; | ||
| 103 | struct AVSubtitle; | ||
| 104 | struct AVPacket; | ||
| 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:27; | ||
| 137 | |||
| 138 | /** | ||
| 139 | * This field determines the video color ranges supported by an encoder. | ||
| 140 | * Should be set to a bitmask of AVCOL_RANGE_MPEG and AVCOL_RANGE_JPEG. | ||
| 141 | */ | ||
| 142 | unsigned color_ranges:2; | ||
| 143 | |||
| 144 | /** | ||
| 145 | * This field determines the type of the codec (decoder/encoder) | ||
| 146 | * and also the exact callback cb implemented by the codec. | ||
| 147 | * cb_type uses enum FFCodecType values. | ||
| 148 | */ | ||
| 149 | unsigned cb_type:3; | ||
| 150 | |||
| 151 | int priv_data_size; | ||
| 152 | /** | ||
| 153 | * @name Frame-level threading support functions | ||
| 154 | * @{ | ||
| 155 | */ | ||
| 156 | /** | ||
| 157 | * Copy necessary context variables from a previous thread context to the current one. | ||
| 158 | * If not defined, the next thread will start automatically; otherwise, the codec | ||
| 159 | * must call ff_thread_finish_setup(). | ||
| 160 | * | ||
| 161 | * dst and src will (rarely) point to the same context, in which case memcpy should be skipped. | ||
| 162 | */ | ||
| 163 | int (*update_thread_context)(struct AVCodecContext *dst, const struct AVCodecContext *src); | ||
| 164 | |||
| 165 | /** | ||
| 166 | * Copy variables back to the user-facing context | ||
| 167 | */ | ||
| 168 | int (*update_thread_context_for_user)(struct AVCodecContext *dst, const struct AVCodecContext *src); | ||
| 169 | /** @} */ | ||
| 170 | |||
| 171 | /** | ||
| 172 | * Private codec-specific defaults. | ||
| 173 | */ | ||
| 174 | const FFCodecDefault *defaults; | ||
| 175 | |||
| 176 | int (*init)(struct AVCodecContext *); | ||
| 177 | |||
| 178 | union { | ||
| 179 | /** | ||
| 180 | * Decode to an AVFrame. | ||
| 181 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_DECODE. | ||
| 182 | * | ||
| 183 | * @param avctx codec context | ||
| 184 | * @param[out] frame AVFrame for output | ||
| 185 | * @param[out] got_frame_ptr decoder sets to 0 or 1 to indicate that | ||
| 186 | * a non-empty frame was returned in frame. | ||
| 187 | * @param[in] avpkt AVPacket containing the data to be decoded | ||
| 188 | * @return amount of bytes read from the packet on success, | ||
| 189 | * negative error code on failure | ||
| 190 | */ | ||
| 191 | int (*decode)(struct AVCodecContext *avctx, struct AVFrame *frame, | ||
| 192 | int *got_frame_ptr, struct AVPacket *avpkt); | ||
| 193 | /** | ||
| 194 | * Decode subtitle data to an AVSubtitle. | ||
| 195 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_DECODE_SUB. | ||
| 196 | * | ||
| 197 | * Apart from that this is like the decode callback. | ||
| 198 | */ | ||
| 199 | int (*decode_sub)(struct AVCodecContext *avctx, struct AVSubtitle *sub, | ||
| 200 | int *got_frame_ptr, const struct AVPacket *avpkt); | ||
| 201 | /** | ||
| 202 | * Decode API with decoupled packet/frame dataflow. | ||
| 203 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_RECEIVE_FRAME. | ||
| 204 | * | ||
| 205 | * This function is called to get one output frame. It should call | ||
| 206 | * ff_decode_get_packet() to obtain input data. | ||
| 207 | */ | ||
| 208 | int (*receive_frame)(struct AVCodecContext *avctx, struct AVFrame *frame); | ||
| 209 | /** | ||
| 210 | * Encode data to an AVPacket. | ||
| 211 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_ENCODE | ||
| 212 | * | ||
| 213 | * @param avctx codec context | ||
| 214 | * @param[out] avpkt output AVPacket | ||
| 215 | * @param[in] frame AVFrame containing the input to be encoded | ||
| 216 | * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a | ||
| 217 | * non-empty packet was returned in avpkt. | ||
| 218 | * @return 0 on success, negative error code on failure | ||
| 219 | */ | ||
| 220 | int (*encode)(struct AVCodecContext *avctx, struct AVPacket *avpkt, | ||
| 221 | const struct AVFrame *frame, int *got_packet_ptr); | ||
| 222 | /** | ||
| 223 | * Encode subtitles to a raw buffer. | ||
| 224 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_ENCODE_SUB. | ||
| 225 | */ | ||
| 226 | int (*encode_sub)(struct AVCodecContext *avctx, uint8_t *buf, | ||
| 227 | int buf_size, const struct AVSubtitle *sub); | ||
| 228 | /** | ||
| 229 | * Encode API with decoupled frame/packet dataflow. | ||
| 230 | * cb is in this state if cb_type is FF_CODEC_CB_TYPE_RECEIVE_PACKET. | ||
| 231 | * | ||
| 232 | * This function is called to get one output packet. | ||
| 233 | * It should call ff_encode_get_frame() to obtain input data. | ||
| 234 | */ | ||
| 235 | int (*receive_packet)(struct AVCodecContext *avctx, struct AVPacket *avpkt); | ||
| 236 | } cb; | ||
| 237 | |||
| 238 | int (*close)(struct AVCodecContext *); | ||
| 239 | |||
| 240 | /** | ||
| 241 | * Flush buffers. | ||
| 242 | * Will be called when seeking | ||
| 243 | */ | ||
| 244 | void (*flush)(struct AVCodecContext *); | ||
| 245 | |||
| 246 | /** | ||
| 247 | * Decoding only, a comma-separated list of bitstream filters to apply to | ||
| 248 | * packets before decoding. | ||
| 249 | */ | ||
| 250 | const char *bsfs; | ||
| 251 | |||
| 252 | /** | ||
| 253 | * Array of pointers to hardware configurations supported by the codec, | ||
| 254 | * or NULL if no hardware supported. The array is terminated by a NULL | ||
| 255 | * pointer. | ||
| 256 | * | ||
| 257 | * The user can only access this field via avcodec_get_hw_config(). | ||
| 258 | */ | ||
| 259 | const struct AVCodecHWConfigInternal *const *hw_configs; | ||
| 260 | |||
| 261 | /** | ||
| 262 | * List of supported codec_tags, terminated by FF_CODEC_TAGS_END. | ||
| 263 | */ | ||
| 264 | const uint32_t *codec_tags; | ||
| 265 | |||
| 266 | /** | ||
| 267 | * Custom callback for avcodec_get_supported_config(). If absent, | ||
| 268 | * ff_default_get_supported_config() will be used. `out_num_configs` will | ||
| 269 | * always be set to a valid pointer. | ||
| 270 | */ | ||
| 271 | int (*get_supported_config)(const AVCodecContext *avctx, | ||
| 272 | const AVCodec *codec, | ||
| 273 | enum AVCodecConfig config, | ||
| 274 | unsigned flags, | ||
| 275 | const void **out_configs, | ||
| 276 | int *out_num_configs); | ||
| 277 | } FFCodec; | ||
| 278 | |||
| 279 | /** | ||
| 280 | * Default implementation for avcodec_get_supported_config(). Will return the | ||
| 281 | * relevant fields from AVCodec if present, or NULL otherwise. | ||
| 282 | * | ||
| 283 | * For AVCODEC_CONFIG_COLOR_RANGE, the output will depend on the bitmask in | ||
| 284 | * FFCodec.color_ranges, with a value of 0 returning NULL. | ||
| 285 | */ | ||
| 286 | int ff_default_get_supported_config(const AVCodecContext *avctx, | ||
| 287 | const AVCodec *codec, | ||
| 288 | enum AVCodecConfig config, | ||
| 289 | unsigned flags, | ||
| 290 | const void **out_configs, | ||
| 291 | int *out_num_configs); | ||
| 292 | |||
| 293 | #if CONFIG_SMALL | ||
| 294 | #define CODEC_LONG_NAME(str) .p.long_name = NULL | ||
| 295 | #else | ||
| 296 | #define CODEC_LONG_NAME(str) .p.long_name = str | ||
| 297 | #endif | ||
| 298 | |||
| 299 | #if HAVE_THREADS | ||
| 300 | #define UPDATE_THREAD_CONTEXT(func) \ | ||
| 301 | .update_thread_context = (func) | ||
| 302 | #define UPDATE_THREAD_CONTEXT_FOR_USER(func) \ | ||
| 303 | .update_thread_context_for_user = (func) | ||
| 304 | #else | ||
| 305 | #define UPDATE_THREAD_CONTEXT(func) \ | ||
| 306 | .update_thread_context = NULL | ||
| 307 | #define UPDATE_THREAD_CONTEXT_FOR_USER(func) \ | ||
| 308 | .update_thread_context_for_user = NULL | ||
| 309 | #endif | ||
| 310 | |||
| 311 | #define FF_CODEC_DECODE_CB(func) \ | ||
| 312 | .cb_type = FF_CODEC_CB_TYPE_DECODE, \ | ||
| 313 | .cb.decode = (func) | ||
| 314 | #define FF_CODEC_DECODE_SUB_CB(func) \ | ||
| 315 | .cb_type = FF_CODEC_CB_TYPE_DECODE_SUB, \ | ||
| 316 | .cb.decode_sub = (func) | ||
| 317 | #define FF_CODEC_RECEIVE_FRAME_CB(func) \ | ||
| 318 | .cb_type = FF_CODEC_CB_TYPE_RECEIVE_FRAME, \ | ||
| 319 | .cb.receive_frame = (func) | ||
| 320 | #define FF_CODEC_ENCODE_CB(func) \ | ||
| 321 | .cb_type = FF_CODEC_CB_TYPE_ENCODE, \ | ||
| 322 | .cb.encode = (func) | ||
| 323 | #define FF_CODEC_ENCODE_SUB_CB(func) \ | ||
| 324 | .cb_type = FF_CODEC_CB_TYPE_ENCODE_SUB, \ | ||
| 325 | .cb.encode_sub = (func) | ||
| 326 | #define FF_CODEC_RECEIVE_PACKET_CB(func) \ | ||
| 327 | .cb_type = FF_CODEC_CB_TYPE_RECEIVE_PACKET, \ | ||
| 328 | .cb.receive_packet = (func) | ||
| 329 | |||
| 330 | 26067433 | static av_always_inline const FFCodec *ffcodec(const AVCodec *codec) | |
| 331 | { | ||
| 332 | 26067433 | return (const FFCodec*)codec; | |
| 333 | } | ||
| 334 | |||
| 335 | #endif /* AVCODEC_CODEC_INTERNAL_H */ | ||
| 336 |