Approved hunks for VAAPI / our new shiny hwaccel API
[libav.git] / libavcodec / avcodec.h
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1/*
2 * copyright (c) 2001 Fabrice Bellard
3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
04d7f601 10 *
b78e7197 11 * FFmpeg is distributed in the hope that it will be useful,
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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
b78e7197 17 * License along with FFmpeg; if not, write to the Free Software
e5a389a1 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
20
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21#ifndef AVCODEC_AVCODEC_H
22#define AVCODEC_AVCODEC_H
a96b68b7 23
36df8805 24/**
bad5537e 25 * @file libavcodec/avcodec.h
f5bccd85 26 * external API header
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27 */
28
c60208e7 29#include <errno.h>
76a448ed 30#include "libavutil/avutil.h"
de6d9b64 31
dd1c8f3e 32#define LIBAVCODEC_VERSION_MAJOR 52
b1fa4942 33#define LIBAVCODEC_VERSION_MINOR 18
7b1454c4 34#define LIBAVCODEC_VERSION_MICRO 0
e97ac1e6 35
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36#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
37 LIBAVCODEC_VERSION_MINOR, \
38 LIBAVCODEC_VERSION_MICRO)
39#define LIBAVCODEC_VERSION AV_VERSION(LIBAVCODEC_VERSION_MAJOR, \
40 LIBAVCODEC_VERSION_MINOR, \
41 LIBAVCODEC_VERSION_MICRO)
bb270c08 42#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
5aa083ee 43
bb270c08 44#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
ce2749d2 45
8da9266c 46#define AV_NOPTS_VALUE INT64_C(0x8000000000000000)
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47#define AV_TIME_BASE 1000000
48#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
9740beff 49
7ebf5927 50/**
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51 * Identifies the syntax and semantics of the bitstream.
52 * The principle is roughly:
53 * Two decoders with the same ID can decode the same streams.
54 * Two encoders with the same ID can encode compatible streams.
55 * There may be slight deviations from the principle due to implementation
56 * details.
7ebf5927 57 *
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58 * If you add a codec ID to this list, add it so that
59 * 1. no value of a existing codec ID changes (that would break ABI),
60 * 2. it is as close as possible to similar codecs.
7ebf5927 61 */
de6d9b64 62enum CodecID {
115329f1 63 CODEC_ID_NONE,
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64
65 /* video codecs */
de6d9b64 66 CODEC_ID_MPEG1VIDEO,
0e373b95 67 CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
fb364ada 68 CODEC_ID_MPEG2VIDEO_XVMC,
c6148de2 69 CODEC_ID_H261,
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70 CODEC_ID_H263,
71 CODEC_ID_RV10,
68b94c35 72 CODEC_ID_RV20,
de6d9b64 73 CODEC_ID_MJPEG,
b135d9fb 74 CODEC_ID_MJPEGB,
b1e6b355 75 CODEC_ID_LJPEG,
5e83dec4 76 CODEC_ID_SP5X,
5639729b 77 CODEC_ID_JPEGLS,
bf89e6b1 78 CODEC_ID_MPEG4,
de6d9b64 79 CODEC_ID_RAWVIDEO,
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80 CODEC_ID_MSMPEG4V1,
81 CODEC_ID_MSMPEG4V2,
82 CODEC_ID_MSMPEG4V3,
e1a9dbff 83 CODEC_ID_WMV1,
b50eef3a 84 CODEC_ID_WMV2,
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85 CODEC_ID_H263P,
86 CODEC_ID_H263I,
d4f5d74a 87 CODEC_ID_FLV1,
be8ffec9 88 CODEC_ID_SVQ1,
8b82a956 89 CODEC_ID_SVQ3,
020fcc94 90 CODEC_ID_DVVIDEO,
11f18faf 91 CODEC_ID_HUFFYUV,
f70f7c6d 92 CODEC_ID_CYUV,
0da71265 93 CODEC_ID_H264,
deabd4fd 94 CODEC_ID_INDEO3,
d86053a4 95 CODEC_ID_VP3,
f44ee2c3 96 CODEC_ID_THEORA,
3d2e8cce 97 CODEC_ID_ASV1,
9b56edf5 98 CODEC_ID_ASV2,
5e20f836 99 CODEC_ID_FFV1,
e2a7bb28 100 CODEC_ID_4XM,
be3564ed 101 CODEC_ID_VCR1,
3aff069b 102 CODEC_ID_CLJR,
c3bf0288 103 CODEC_ID_MDEC,
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104 CODEC_ID_ROQ,
105 CODEC_ID_INTERPLAY_VIDEO,
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106 CODEC_ID_XAN_WC3,
107 CODEC_ID_XAN_WC4,
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108 CODEC_ID_RPZA,
109 CODEC_ID_CINEPAK,
110 CODEC_ID_WS_VQA,
111 CODEC_ID_MSRLE,
112 CODEC_ID_MSVIDEO1,
4120a53a 113 CODEC_ID_IDCIN,
1dc1ed99 114 CODEC_ID_8BPS,
11e29a41 115 CODEC_ID_SMC,
42cad81a 116 CODEC_ID_FLIC,
9a4117d5 117 CODEC_ID_TRUEMOTION1,
fafa0b75 118 CODEC_ID_VMDVIDEO,
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119 CODEC_ID_MSZH,
120 CODEC_ID_ZLIB,
070ed1bc 121 CODEC_ID_QTRLE,
791e7b83 122 CODEC_ID_SNOW,
9d53d58e 123 CODEC_ID_TSCC,
d0a0bbd2 124 CODEC_ID_ULTI,
d08d7142 125 CODEC_ID_QDRAW,
ab711b3c 126 CODEC_ID_VIXL,
acfd8f0f 127 CODEC_ID_QPEG,
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128 CODEC_ID_XVID,
129 CODEC_ID_PNG,
130 CODEC_ID_PPM,
131 CODEC_ID_PBM,
132 CODEC_ID_PGM,
133 CODEC_ID_PGMYUV,
134 CODEC_ID_PAM,
f37b9768 135 CODEC_ID_FFVHUFF,
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136 CODEC_ID_RV30,
137 CODEC_ID_RV40,
10b9c374 138 CODEC_ID_VC1,
21aa398f 139 CODEC_ID_WMV3,
9c7fb608 140 CODEC_ID_LOCO,
a8a15e9d 141 CODEC_ID_WNV1,
589f8220 142 CODEC_ID_AASC,
856dbbff 143 CODEC_ID_INDEO2,
b81f8949 144 CODEC_ID_FRAPS,
64af6168 145 CODEC_ID_TRUEMOTION2,
9fa62f2a 146 CODEC_ID_BMP,
e0f80bd7 147 CODEC_ID_CSCD,
4e114829 148 CODEC_ID_MMVIDEO,
9c8d8e84 149 CODEC_ID_ZMBV,
26376701 150 CODEC_ID_AVS,
348efc18 151 CODEC_ID_SMACKVIDEO,
dfca23e3 152 CODEC_ID_NUV,
fd7b1991 153 CODEC_ID_KMVC,
0919e788 154 CODEC_ID_FLASHSV,
20ffddb9 155 CODEC_ID_CAVS,
f31065f6 156 CODEC_ID_JPEG2000,
eb57c889 157 CODEC_ID_VMNC,
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158 CODEC_ID_VP5,
159 CODEC_ID_VP6,
160 CODEC_ID_VP6F,
3689cf16 161 CODEC_ID_TARGA,
72450e50 162 CODEC_ID_DSICINVIDEO,
29f86228 163 CODEC_ID_TIERTEXSEQVIDEO,
a991b1fe 164 CODEC_ID_TIFF,
06d392a7 165 CODEC_ID_GIF,
3edeab82 166 CODEC_ID_FFH264,
33a0dd37 167 CODEC_ID_DXA,
52b6bad2 168 CODEC_ID_DNXHD,
efb0c399 169 CODEC_ID_THP,
2d99eed1 170 CODEC_ID_SGI,
9a0ddd09 171 CODEC_ID_C93,
1e6c6759 172 CODEC_ID_BETHSOFTVID,
b46d68c6 173 CODEC_ID_PTX,
1ca779e7 174 CODEC_ID_TXD,
91fc2cf1 175 CODEC_ID_VP6A,
8787d837 176 CODEC_ID_AMV,
66f7679c 177 CODEC_ID_VB,
b4abe1d1 178 CODEC_ID_PCX,
d43df959 179 CODEC_ID_SUNRAST,
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180 CODEC_ID_INDEO4,
181 CODEC_ID_INDEO5,
a7129de5 182 CODEC_ID_MIMIC,
975cdc8f 183 CODEC_ID_RL2,
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184 CODEC_ID_8SVX_EXP,
185 CODEC_ID_8SVX_FIB,
40d26273 186 CODEC_ID_ESCAPE124,
782a58ec 187 CODEC_ID_DIRAC,
b64c096b 188 CODEC_ID_BFI,
495900f7 189 CODEC_ID_CMV,
974e0eee 190 CODEC_ID_MOTIONPIXELS,
cfc78718 191 CODEC_ID_TGV,
42b30357 192 CODEC_ID_TGQ,
d8964f3a 193 CODEC_ID_TQI,
a96b68b7 194
f5bccd85 195 /* various PCM "codecs" */
17179d2d 196 CODEC_ID_PCM_S16LE= 0x10000,
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197 CODEC_ID_PCM_S16BE,
198 CODEC_ID_PCM_U16LE,
199 CODEC_ID_PCM_U16BE,
200 CODEC_ID_PCM_S8,
201 CODEC_ID_PCM_U8,
202 CODEC_ID_PCM_MULAW,
203 CODEC_ID_PCM_ALAW,
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204 CODEC_ID_PCM_S32LE,
205 CODEC_ID_PCM_S32BE,
206 CODEC_ID_PCM_U32LE,
207 CODEC_ID_PCM_U32BE,
208 CODEC_ID_PCM_S24LE,
209 CODEC_ID_PCM_S24BE,
210 CODEC_ID_PCM_U24LE,
211 CODEC_ID_PCM_U24BE,
212 CODEC_ID_PCM_S24DAUD,
a11c2a2c 213 CODEC_ID_PCM_ZORK,
725d86bf 214 CODEC_ID_PCM_S16LE_PLANAR,
1472b7dd 215 CODEC_ID_PCM_DVD,
aa29709e 216 CODEC_ID_PCM_F32BE,
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217 CODEC_ID_PCM_F32LE,
218 CODEC_ID_PCM_F64BE,
219 CODEC_ID_PCM_F64LE,
0147f198 220
f5bccd85 221 /* various ADPCM codecs */
17179d2d 222 CODEC_ID_ADPCM_IMA_QT= 0x11000,
0147f198 223 CODEC_ID_ADPCM_IMA_WAV,
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224 CODEC_ID_ADPCM_IMA_DK3,
225 CODEC_ID_ADPCM_IMA_DK4,
2fdf638b 226 CODEC_ID_ADPCM_IMA_WS,
7d8379f2 227 CODEC_ID_ADPCM_IMA_SMJPEG,
0147f198 228 CODEC_ID_ADPCM_MS,
e2a7bb28 229 CODEC_ID_ADPCM_4XM,
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230 CODEC_ID_ADPCM_XA,
231 CODEC_ID_ADPCM_ADX,
7d8379f2 232 CODEC_ID_ADPCM_EA,
e5966052 233 CODEC_ID_ADPCM_G726,
b3bfb299 234 CODEC_ID_ADPCM_CT,
659c3692 235 CODEC_ID_ADPCM_SWF,
2ff4524e 236 CODEC_ID_ADPCM_YAMAHA,
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237 CODEC_ID_ADPCM_SBPRO_4,
238 CODEC_ID_ADPCM_SBPRO_3,
239 CODEC_ID_ADPCM_SBPRO_2,
d1e0d21f 240 CODEC_ID_ADPCM_THP,
3a7f5d07 241 CODEC_ID_ADPCM_IMA_AMV,
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242 CODEC_ID_ADPCM_EA_R1,
243 CODEC_ID_ADPCM_EA_R3,
244 CODEC_ID_ADPCM_EA_R2,
7bb65d89 245 CODEC_ID_ADPCM_IMA_EA_SEAD,
fac84d3c 246 CODEC_ID_ADPCM_IMA_EA_EACS,
271b4095 247 CODEC_ID_ADPCM_EA_XAS,
861c63a2 248 CODEC_ID_ADPCM_EA_MAXIS_XA,
055dc116 249 CODEC_ID_ADPCM_IMA_ISS,
891f64b3 250
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251 /* AMR */
252 CODEC_ID_AMR_NB= 0x12000,
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253 CODEC_ID_AMR_WB,
254
b8414bbd 255 /* RealAudio codecs*/
17179d2d 256 CODEC_ID_RA_144= 0x13000,
b8414bbd 257 CODEC_ID_RA_288,
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258
259 /* various DPCM codecs */
17179d2d 260 CODEC_ID_ROQ_DPCM= 0x14000,
3ef8be2b 261 CODEC_ID_INTERPLAY_DPCM,
9937e686 262 CODEC_ID_XAN_DPCM,
d08d7142 263 CODEC_ID_SOL_DPCM,
115329f1 264
ba0dabbf 265 /* audio codecs */
17179d2d 266 CODEC_ID_MP2= 0x15000,
0e373b95 267 CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
17179d2d 268 CODEC_ID_AAC,
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269 CODEC_ID_AC3,
270 CODEC_ID_DTS,
271 CODEC_ID_VORBIS,
272 CODEC_ID_DVAUDIO,
273 CODEC_ID_WMAV1,
274 CODEC_ID_WMAV2,
275 CODEC_ID_MACE3,
276 CODEC_ID_MACE6,
277 CODEC_ID_VMDAUDIO,
278 CODEC_ID_SONIC,
279 CODEC_ID_SONIC_LS,
ac2570a8 280 CODEC_ID_FLAC,
1ede228a 281 CODEC_ID_MP3ADU,
d2a7718d 282 CODEC_ID_MP3ON4,
85ad5695 283 CODEC_ID_SHORTEN,
5df8a0c6 284 CODEC_ID_ALAC,
034eeaa1 285 CODEC_ID_WESTWOOD_SND1,
0e373b95 286 CODEC_ID_GSM, ///< as in Berlin toast format
d9b1c197 287 CODEC_ID_QDM2,
e0f7e329 288 CODEC_ID_COOK,
bf3027c8 289 CODEC_ID_TRUESPEECH,
a24c4a2a 290 CODEC_ID_TTA,
348efc18 291 CODEC_ID_SMACKAUDIO,
6c496518 292 CODEC_ID_QCELP,
730581f3 293 CODEC_ID_WAVPACK,
72450e50 294 CODEC_ID_DSICINAUDIO,
84ed36da 295 CODEC_ID_IMC,
185c7b6b 296 CODEC_ID_MUSEPACK7,
aad512b4 297 CODEC_ID_MLP,
f5bccd85 298 CODEC_ID_GSM_MS, /* as found in WAV */
10e26bc7 299 CODEC_ID_ATRAC3,
8950f828 300 CODEC_ID_VOXWARE,
bf4a1f17 301 CODEC_ID_APE,
636b13c5 302 CODEC_ID_NELLYMOSER,
12877faf 303 CODEC_ID_MUSEPACK8,
cb4ddf77 304 CODEC_ID_SPEEX,
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305 CODEC_ID_WMAVOICE,
306 CODEC_ID_WMAPRO,
800b9c24 307 CODEC_ID_WMALOSSLESS,
b339f0c6 308 CODEC_ID_ATRAC3P,
2988c93d 309 CODEC_ID_EAC3,
faeedbbb 310 CODEC_ID_SIPR,
7f507b2d 311 CODEC_ID_MP1,
115329f1 312
240c1657 313 /* subtitle codecs */
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314 CODEC_ID_DVD_SUBTITLE= 0x17000,
315 CODEC_ID_DVB_SUBTITLE,
0e373b95 316 CODEC_ID_TEXT, ///< raw UTF-8 text
7e2643ae 317 CODEC_ID_XSUB,
f9a9b350 318 CODEC_ID_SSA,
cc8c2c6a 319 CODEC_ID_MOV_TEXT,
115329f1 320
7ce68923 321 /* other specific kind of codecs (generally used for attachments) */
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322 CODEC_ID_TTF= 0x18000,
323
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324 CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
325
0e373b95 326 CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
f5bccd85 327 * stream (only used by libavformat) */
de6d9b64 328};
dcedf586 329
de6d9b64 330enum CodecType {
4a663d80 331 CODEC_TYPE_UNKNOWN = -1,
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332 CODEC_TYPE_VIDEO,
333 CODEC_TYPE_AUDIO,
985180a1 334 CODEC_TYPE_DATA,
240c1657 335 CODEC_TYPE_SUBTITLE,
f8d7c9d3 336 CODEC_TYPE_ATTACHMENT,
9ff77d17 337 CODEC_TYPE_NB
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338};
339
0e373b95 340/**
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341 * all in native-endian format
342 */
a96b68b7 343enum SampleFormat {
9076fee4 344 SAMPLE_FMT_NONE = -1,
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345 SAMPLE_FMT_U8, ///< unsigned 8 bits
346 SAMPLE_FMT_S16, ///< signed 16 bits
115329f1 347 SAMPLE_FMT_S32, ///< signed 32 bits
a3a5f4d6 348 SAMPLE_FMT_FLT, ///< float
e06b00f3 349 SAMPLE_FMT_DBL, ///< double
88a07af7 350 SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec
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351};
352
0d72e7d0 353/* Audio channel masks */
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354#define CH_FRONT_LEFT 0x00000001
355#define CH_FRONT_RIGHT 0x00000002
356#define CH_FRONT_CENTER 0x00000004
357#define CH_LOW_FREQUENCY 0x00000008
358#define CH_BACK_LEFT 0x00000010
359#define CH_BACK_RIGHT 0x00000020
360#define CH_FRONT_LEFT_OF_CENTER 0x00000040
361#define CH_FRONT_RIGHT_OF_CENTER 0x00000080
362#define CH_BACK_CENTER 0x00000100
363#define CH_SIDE_LEFT 0x00000200
364#define CH_SIDE_RIGHT 0x00000400
365#define CH_TOP_CENTER 0x00000800
366#define CH_TOP_FRONT_LEFT 0x00001000
367#define CH_TOP_FRONT_CENTER 0x00002000
368#define CH_TOP_FRONT_RIGHT 0x00004000
369#define CH_TOP_BACK_LEFT 0x00008000
370#define CH_TOP_BACK_CENTER 0x00010000
371#define CH_TOP_BACK_RIGHT 0x00020000
372#define CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
373#define CH_STEREO_RIGHT 0x40000000 ///< See CH_STEREO_LEFT.
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374
375/* Audio channel convenience macros */
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376#define CH_LAYOUT_MONO (CH_FRONT_CENTER)
377#define CH_LAYOUT_STEREO (CH_FRONT_LEFT|CH_FRONT_RIGHT)
378#define CH_LAYOUT_SURROUND (CH_LAYOUT_STEREO|CH_FRONT_CENTER)
379#define CH_LAYOUT_QUAD (CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT)
380#define CH_LAYOUT_5POINT0 (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT)
381#define CH_LAYOUT_5POINT1 (CH_LAYOUT_5POINT0|CH_LOW_FREQUENCY)
382#define CH_LAYOUT_7POINT1 (CH_LAYOUT_5POINT1|CH_BACK_LEFT|CH_BACK_RIGHT)
383#define CH_LAYOUT_7POINT1_WIDE (CH_LAYOUT_SURROUND|CH_LOW_FREQUENCY|\
384 CH_BACK_LEFT|CH_BACK_RIGHT|\
385 CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER)
386#define CH_LAYOUT_STEREO_DOWNMIX (CH_STEREO_LEFT|CH_STEREO_RIGHT)
0d72e7d0 387
de6d9b64 388/* in bytes */
8170e5fb 389#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
de6d9b64 390
d7425f59 391/**
cf713bb8 392 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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393 * This is mainly needed because some optimized bitstream readers read
394 * 32 or 64 bit at once and could read over the end.<br>
395 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
396 * MPEG bitstreams could cause overread and segfault.
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397 */
398#define FF_INPUT_BUFFER_PADDING_SIZE 8
399
0ecca7a4 400/**
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401 * minimum encoding buffer size
402 * Used to avoid some checks during header writing.
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403 */
404#define FF_MIN_BUFFER_SIZE 16384
405
47146dfb 406
0e373b95 407/**
bafc102b 408 * motion estimation type.
0e373b95 409 */
e4986da9 410enum Motion_Est_ID {
9b4dd1b8 411 ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
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412 ME_FULL,
413 ME_LOG,
414 ME_PHODS,
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415 ME_EPZS, ///< enhanced predictive zonal search
416 ME_X1, ///< reserved for experiments
417 ME_HEX, ///< hexagon based search
418 ME_UMH, ///< uneven multi-hexagon search
419 ME_ITER, ///< iterative search
359bbdab 420 ME_TESA, ///< transformed exhaustive search algorithm
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421};
422
8c3eba7c 423enum AVDiscard{
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424 /* We leave some space between them for extensions (drop some
425 * keyframes for intra-only or drop just some bidir frames). */
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426 AVDISCARD_NONE =-16, ///< discard nothing
427 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
428 AVDISCARD_NONREF = 8, ///< discard all non reference
429 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
430 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
431 AVDISCARD_ALL = 48, ///< discard all
432};
433
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434typedef struct RcOverride{
435 int start_frame;
436 int end_frame;
f5bccd85 437 int qscale; // If this is 0 then quality_factor will be used instead.
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438 float quality_factor;
439} RcOverride;
440
b0ec9efd 441#define FF_MAX_B_FRAMES 16
9dbcbd92 442
a949d72e 443/* encoding support
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444 These flags can be passed in AVCodecContext.flags before initialization.
445 Note: Not everything is supported yet.
a949d72e 446*/
de6d9b64 447
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448#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
449#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
450#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
451#define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
452#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
453#define CODEC_FLAG_PART 0x0080 ///< Use data partitioning.
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454/**
455 * The parent program guarantees that the input for B-frames containing
f5bccd85 456 * streams is not written to for at least s->max_b_frames+1 frames, if
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457 * this is not set the input will be copied.
458 */
8b4c7dbc 459#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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460#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
461#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
462#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
463#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
464#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
465#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
466#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
467 location instead of only at frame boundaries. */
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468#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
469#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
470#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
471#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan.
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472#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
473#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
21e59552 474/* Fx : Flag for h263+ extra options */
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475#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
476#define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector
477#define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
478#define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
479#define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC
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480#define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
481#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
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482#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
483#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
f5bccd85 484#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
f3eec1cf 485#define CODEC_FLAG_CLOSED_GOP 0x80000000
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486#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
487#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
488#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
489#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
490#define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references.
491#define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames
d3075ed5 492#define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
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493#define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
494#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
495#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
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496#define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization
497#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table.
498#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
499#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
500#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
501#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
502#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
f1618fd9 503#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
6fc5b059 504
21e59552 505/* Unsupported options :
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506 * Syntax Arithmetic coding (SAC)
507 * Reference Picture Selection
eafcac6a 508 * Independent Segment Decoding */
21e59552 509/* /Fx */
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510/* codec capabilities */
511
f5bccd85 512#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
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513/**
514 * Codec uses get_buffer() for allocating buffers.
515 * direct rendering method 1
516 */
517#define CODEC_CAP_DR1 0x0002
f5bccd85 518/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
917e06c8 519#define CODEC_CAP_PARSE_ONLY 0x0004
d7425f59 520#define CODEC_CAP_TRUNCATED 0x0008
f5bccd85 521/* Codec can export data for HW decoding (XvMC). */
5e5c247a 522#define CODEC_CAP_HWACCEL 0x0010
115329f1 523/**
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524 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
525 * If this is not set, the codec is guaranteed to never be fed with NULL data.
934982c4 526 */
6f824977 527#define CODEC_CAP_DELAY 0x0020
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528/**
529 * Codec can be fed a final frame with a smaller size.
530 * This can be used to prevent truncation of the last audio samples.
531 */
532#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
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533/**
534 * Codec can export data for HW decoding (VDPAU).
535 */
536#define CODEC_CAP_HWACCEL_VDPAU 0x0080
bf89e6b1 537
f5bccd85 538//The following defines may change, don't expect compatibility if you use them.
8d7ec294 539#define MB_TYPE_INTRA4x4 0x0001
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540#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
541#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
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542#define MB_TYPE_16x16 0x0008
543#define MB_TYPE_16x8 0x0010
544#define MB_TYPE_8x16 0x0020
545#define MB_TYPE_8x8 0x0040
546#define MB_TYPE_INTERLACED 0x0080
273b0cd3 547#define MB_TYPE_DIRECT2 0x0100 //FIXME
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548#define MB_TYPE_ACPRED 0x0200
549#define MB_TYPE_GMC 0x0400
550#define MB_TYPE_SKIP 0x0800
551#define MB_TYPE_P0L0 0x1000
552#define MB_TYPE_P1L0 0x2000
553#define MB_TYPE_P0L1 0x4000
554#define MB_TYPE_P1L1 0x8000
555#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
556#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
557#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
558#define MB_TYPE_QUANT 0x00010000
559#define MB_TYPE_CBP 0x00020000
560//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
561
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562/**
563 * Pan Scan area.
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564 * This specifies the area which should be displayed.
565 * Note there may be multiple such areas for one frame.
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566 */
567typedef struct AVPanScan{
568 /**
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569 * id
570 * - encoding: Set by user.
571 * - decoding: Set by libavcodec.
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572 */
573 int id;
574
575 /**
576 * width and height in 1/16 pel
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577 * - encoding: Set by user.
578 * - decoding: Set by libavcodec.
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579 */
580 int width;
581 int height;
582
583 /**
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584 * position of the top left corner in 1/16 pel for up to 3 fields/frames
585 * - encoding: Set by user.
586 * - decoding: Set by libavcodec.
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587 */
588 int16_t position[3][2];
589}AVPanScan;
590
492cd3a9 591#define FF_COMMON_FRAME \
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592 /**\
593 * pointer to the picture planes.\
f5bccd85 594 * This might be different from the first allocated byte\
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595 * - encoding: \
596 * - decoding: \
597 */\
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598 uint8_t *data[4];\
599 int linesize[4];\
600 /**\
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601 * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
602 * This isn't used by libavcodec unless the default get/release_buffer() is used.\
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603 * - encoding: \
604 * - decoding: \
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605 */\
606 uint8_t *base[4];\
607 /**\
608 * 1 -> keyframe, 0-> not\
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609 * - encoding: Set by libavcodec.\
610 * - decoding: Set by libavcodec.\
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611 */\
612 int key_frame;\
613\
614 /**\
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615 * Picture type of the frame, see ?_TYPE below.\
616 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
617 * - decoding: Set by libavcodec.\
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618 */\
619 int pict_type;\
620\
621 /**\
c0df9d75 622 * presentation timestamp in time_base units (time when frame should be shown to user)\
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623 * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
624 * - encoding: MUST be set by user.\
625 * - decoding: Set by libavcodec.\
1e491e29 626 */\
be6784dc 627 int64_t pts;\
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628\
629 /**\
f5bccd85 630 * picture number in bitstream order\
64863965 631 * - encoding: set by\
f5bccd85 632 * - decoding: Set by libavcodec.\
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633 */\
634 int coded_picture_number;\
635 /**\
f5bccd85 636 * picture number in display order\
64863965 637 * - encoding: set by\
f5bccd85 638 * - decoding: Set by libavcodec.\
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639 */\
640 int display_picture_number;\
641\
642 /**\
158c7f05 643 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
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644 * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
645 * - decoding: Set by libavcodec.\
1e491e29 646 */\
158c7f05 647 int quality; \
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648\
649 /**\
650 * buffer age (1->was last buffer and dint change, 2->..., ...).\
f5bccd85 651 * Set to INT_MAX if the buffer has not been used yet.\
64863965 652 * - encoding: unused\
f5bccd85 653 * - decoding: MUST be set by get_buffer().\
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654 */\
655 int age;\
656\
657 /**\
658 * is this picture used as reference\
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659 * The values for this are the same as the MpegEncContext.picture_structure\
660 * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
64863965 661 * - encoding: unused\
f5bccd85 662 * - decoding: Set by libavcodec. (before get_buffer() call)).\
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663 */\
664 int reference;\
665\
666 /**\
667 * QP table\
64863965 668 * - encoding: unused\
f5bccd85 669 * - decoding: Set by libavcodec.\
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670 */\
671 int8_t *qscale_table;\
672 /**\
673 * QP store stride\
64863965 674 * - encoding: unused\
f5bccd85 675 * - decoding: Set by libavcodec.\
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676 */\
677 int qstride;\
678\
679 /**\
f5bccd85 680 * mbskip_table[mb]>=1 if MB didn't change\
1e491e29 681 * stride= mb_width = (width+15)>>4\
64863965 682 * - encoding: unused\
f5bccd85 683 * - decoding: Set by libavcodec.\
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684 */\
685 uint8_t *mbskip_table;\
686\
687 /**\
f5bccd85 688 * motion vector table\
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689 * @code\
690 * example:\
691 * int mv_sample_log2= 4 - motion_subsample_log2;\
692 * int mb_width= (width+15)>>4;\
693 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
694 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
695 * @endcode\
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696 * - encoding: Set by user.\
697 * - decoding: Set by libavcodec.\
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698 */\
699 int16_t (*motion_val[2])[2];\
700\
701 /**\
f5bccd85 702 * macroblock type table\
8d7ec294 703 * mb_type_base + mb_width + 2\
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704 * - encoding: Set by user.\
705 * - decoding: Set by libavcodec.\
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706 */\
707 uint32_t *mb_type;\
708\
709 /**\
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710 * log2 of the size of the block which a single vector in motion_val represents: \
711 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
8d7ec294 712 * - encoding: unused\
f5bccd85 713 * - decoding: Set by libavcodec.\
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714 */\
715 uint8_t motion_subsample_log2;\
716\
717 /**\
1e491e29 718 * for some private data of the user\
64863965 719 * - encoding: unused\
f5bccd85 720 * - decoding: Set by user.\
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721 */\
722 void *opaque;\
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723\
724 /**\
725 * error\
f5bccd85 726 * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
64863965 727 * - decoding: unused\
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728 */\
729 uint64_t error[4];\
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730\
731 /**\
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732 * type of the buffer (to keep track of who has to deallocate data[*])\
733 * - encoding: Set by the one who allocates it.\
734 * - decoding: Set by the one who allocates it.\
735 * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
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736 */\
737 int type;\
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738 \
739 /**\
f5bccd85 740 * When decoding, this signals how much the picture must be delayed.\
2ec23b6d 741 * extra_delay = repeat_pict / (2*fps)\
64863965 742 * - encoding: unused\
f5bccd85 743 * - decoding: Set by libavcodec.\
2ec23b6d 744 */\
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745 int repeat_pict;\
746 \
747 /**\
748 * \
749 */\
750 int qscale_type;\
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751 \
752 /**\
753 * The content of the picture is interlaced.\
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754 * - encoding: Set by user.\
755 * - decoding: Set by libavcodec. (default 0)\
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756 */\
757 int interlaced_frame;\
758 \
759 /**\
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760 * If the content is interlaced, is top field displayed first.\
761 * - encoding: Set by user.\
762 * - decoding: Set by libavcodec.\
2744ca9a 763 */\
9dad924e 764 int top_field_first;\
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765 \
766 /**\
767 * Pan scan.\
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768 * - encoding: Set by user.\
769 * - decoding: Set by libavcodec.\
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770 */\
771 AVPanScan *pan_scan;\
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772 \
773 /**\
f5bccd85 774 * Tell user application that palette has changed from previous frame.\
2a2bbcb0 775 * - encoding: ??? (no palette-enabled encoder yet)\
f5bccd85 776 * - decoding: Set by libavcodec. (default 0).\
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777 */\
778 int palette_has_changed;\
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779 \
780 /**\
f5bccd85 781 * codec suggestion on buffer type if != 0\
074c4ca7 782 * - encoding: unused\
f5bccd85 783 * - decoding: Set by libavcodec. (before get_buffer() call)).\
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RT
784 */\
785 int buffer_hints;\
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786\
787 /**\
f5bccd85 788 * DCT coefficients\
8289c6fa 789 * - encoding: unused\
f5bccd85 790 * - decoding: Set by libavcodec.\
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791 */\
792 short *dct_coeff;\
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793\
794 /**\
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795 * motion referece frame index\
796 * - encoding: Set by user.\
797 * - decoding: Set by libavcodec.\
a4d36c11 798 */\
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799 int8_t *ref_index[2];\
800\
801 /**\
802 * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
803 * output in AVFrame.reordered_opaque\
804 * - encoding: unused\
805 * - decoding: Read by user.\
806 */\
807 int64_t reordered_opaque;\
808
2ec23b6d 809
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810#define FF_QSCALE_TYPE_MPEG1 0
811#define FF_QSCALE_TYPE_MPEG2 1
812#define FF_QSCALE_TYPE_H264 2
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813
814#define FF_BUFFER_TYPE_INTERNAL 1
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815#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
816#define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
817#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
4e00e76b 818
1e491e29 819
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820#define FF_I_TYPE 1 ///< Intra
821#define FF_P_TYPE 2 ///< Predicted
822#define FF_B_TYPE 3 ///< Bi-dir predicted
823#define FF_S_TYPE 4 ///< S(GMC)-VOP MPEG4
824#define FF_SI_TYPE 5 ///< Switching Intra
825#define FF_SP_TYPE 6 ///< Switching Predicted
48d533e6 826#define FF_BI_TYPE 7
1e491e29 827
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DB
828#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
829#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
830#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
831#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
074c4ca7 832
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MN
833/**
834 * Audio Video Frame.
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835 * New fields can be added to the end of FF_COMMON_FRAME with minor version
836 * bumps.
8bfb108b 837 * Removal, reordering and changes to existing fields require a major
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838 * version bump. No fields should be added into AVFrame before or after
839 * FF_COMMON_FRAME!
8bfb108b 840 * sizeof(AVFrame) must not be used outside libav*.
0da71265 841 */
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842typedef struct AVFrame {
843 FF_COMMON_FRAME
844} AVFrame;
1e491e29 845
d33c949c 846/**
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847 * main external API structure.
848 * New fields can be added to the end with minor version bumps.
8bfb108b 849 * Removal, reordering and changes to existing fields require a major
252f17e2 850 * version bump.
8bfb108b 851 * sizeof(AVCodecContext) must not be used outside libav*.
d33c949c 852 */
de6d9b64 853typedef struct AVCodecContext {
b71901e6 854 /**
f5bccd85 855 * information on struct for av_log
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856 * - set by avcodec_alloc_context
857 */
d42a814e 858 const AVClass *av_class;
bc874dae 859 /**
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860 * the average bitrate
861 * - encoding: Set by user; unused for constant quantizer encoding.
862 * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
b71901e6 863 */
de6d9b64 864 int bit_rate;
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865
866 /**
64863965 867 * number of bits the bitstream is allowed to diverge from the reference.
b71901e6 868 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
f5bccd85 869 * - encoding: Set by user; unused for constant quantizer encoding.
64863965 870 * - decoding: unused
b71901e6 871 */
115329f1 872 int bit_rate_tolerance;
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873
874 /**
64863965 875 * CODEC_FLAG_*.
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876 * - encoding: Set by user.
877 * - decoding: Set by user.
b71901e6 878 */
de6d9b64 879 int flags;
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880
881 /**
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882 * Some codecs need additional format info. It is stored here.
883 * If any muxer uses this then ALL demuxers/parsers AND encoders for the
884 * specific codec MUST set it correctly otherwise stream copy breaks.
885 * In general use of this field by muxers is not recommanded.
886 * - encoding: Set by libavcodec.
887 * - decoding: Set by libavcodec. (FIXME: Is this OK?)
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888 */
889 int sub_id;
890
891 /**
f5bccd85 892 * Motion estimation algorithm used for video coding.
58f7833e 893 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
89223ef6 894 * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
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895 * - encoding: MUST be set by user.
896 * - decoding: unused
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897 */
898 int me_method;
899
900 /**
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901 * some codecs need / can use extradata like Huffman tables.
902 * mjpeg: Huffman tables
b71901e6 903 * rv10: additional flags
b704e742 904 * mpeg4: global headers (they can be in the bitstream or here)
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DB
905 * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
906 * than extradata_size to avoid prolems if it is read with the bitstream reader.
907 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
908 * - encoding: Set/allocated/freed by libavcodec.
909 * - decoding: Set/allocated/freed by user.
b71901e6 910 */
58f2a4b0 911 uint8_t *extradata;
e84c31dc 912 int extradata_size;
115329f1 913
b71901e6 914 /**
f5bccd85
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915 * This is the fundamental unit of time (in seconds) in terms
916 * of which frame timestamps are represented. For fixed-fps content,
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917 * timebase should be 1/framerate and timestamp increments should be
918 * identically 1.
f5bccd85
DB
919 * - encoding: MUST be set by user.
920 * - decoding: Set by libavcodec.
b71901e6 921 */
c0df9d75 922 AVRational time_base;
115329f1 923
5b28c8c3 924 /* video only */
14bea432 925 /**
21adafec 926 * picture width / height.
115329f1 927 * - encoding: MUST be set by user.
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DB
928 * - decoding: Set by libavcodec.
929 * Note: For compatibility it is possible to set this instead of
930 * coded_width/height before decoding.
b71901e6 931 */
de6d9b64 932 int width, height;
115329f1 933
e769f053 934#define FF_ASPECT_EXTENDED 15
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935
936 /**
f5bccd85
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937 * the number of pictures in a group of pictures, or 0 for intra_only
938 * - encoding: Set by user.
64863965 939 * - decoding: unused
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940 */
941 int gop_size;
942
943 /**
f5bccd85
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944 * Pixel format, see PIX_FMT_xxx.
945 * - encoding: Set by user.
946 * - decoding: Set by libavcodec.
b71901e6 947 */
e4eadb4b 948 enum PixelFormat pix_fmt;
115329f1 949
bdfcbbed 950 /**
f5bccd85 951 * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
bdfcbbed 952 * has to read frames at native frame rate.
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953 * - encoding: Set by user.
954 * - decoding: unused
bdfcbbed
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955 */
956 int rate_emu;
115329f1 957
b71901e6 958 /**
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959 * If non NULL, 'draw_horiz_band' is called by the libavcodec
960 * decoder to draw a horizontal band. It improves cache usage. Not
b71901e6 961 * all codecs can do that. You must check the codec capabilities
f5bccd85 962 * beforehand.
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963 * The function is also used by hardware acceleration APIs.
964 * It is called at least once during frame decoding to pass
965 * the data needed for hardware render.
966 * In that mode instead of pixel data, AVFrame points to
967 * a structure specific to the acceleration API. The application
968 * reads the structure and can change some fields to indicate progress
969 * or mark state.
64863965 970 * - encoding: unused
f5bccd85 971 * - decoding: Set by user.
3bb07d61
MN
972 * @param height the height of the slice
973 * @param y the y position of the slice
974 * @param type 1->top field, 2->bottom field, 3->frame
975 * @param offset offset into the AVFrame.data from which the slice should be read
b71901e6 976 */
bf89e6b1 977 void (*draw_horiz_band)(struct AVCodecContext *s,
da64ecc3 978 const AVFrame *src, int offset[4],
3bb07d61 979 int y, int type, int height);
bf89e6b1 980
de6d9b64 981 /* audio only */
f5bccd85 982 int sample_rate; ///< samples per second
5fcc4a23 983 int channels; ///< number of audio channels
a3a5f4d6
MN
984
985 /**
f5bccd85
DB
986 * audio sample format
987 * - encoding: Set by user.
988 * - decoding: Set by libavcodec.
a3a5f4d6 989 */
f5bccd85 990 enum SampleFormat sample_fmt; ///< sample format, currently unused
de6d9b64 991
f5bccd85 992 /* The following data should not be initialized. */
718b27a7 993 /**
f5bccd85 994 * Samples per packet, initialized when calling 'init'.
718b27a7
MN
995 */
996 int frame_size;
115329f1 997 int frame_number; ///< audio or video frame number
f5bccd85 998 int real_pict_num; ///< Returns the real picture number of previous encoded frame.
115329f1 999
b71901e6 1000 /**
f5bccd85 1001 * Number of frames the decoded output will be delayed relative to
64863965 1002 * the encoded input.
f5bccd85 1003 * - encoding: Set by libavcodec.
64863965 1004 * - decoding: unused
b71901e6
MN
1005 */
1006 int delay;
115329f1 1007
64863965
MN
1008 /* - encoding parameters */
1009 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
115329f1
DB
1010 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
1011
b71901e6 1012 /**
f5bccd85
DB
1013 * minimum quantizer
1014 * - encoding: Set by user.
64863965 1015 * - decoding: unused
b71901e6
MN
1016 */
1017 int qmin;
1018
1019 /**
f5bccd85
DB
1020 * maximum quantizer
1021 * - encoding: Set by user.
64863965 1022 * - decoding: unused
b71901e6
MN
1023 */
1024 int qmax;
1025
1026 /**
f5bccd85
DB
1027 * maximum quantizer difference between frames
1028 * - encoding: Set by user.
64863965 1029 * - decoding: unused
b71901e6
MN
1030 */
1031 int max_qdiff;
1032
1033 /**
f5bccd85
DB
1034 * maximum number of B-frames between non-B-frames
1035 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1036 * - encoding: Set by user.
64863965 1037 * - decoding: unused
b71901e6
MN
1038 */
1039 int max_b_frames;
1040
1041 /**
f5bccd85 1042 * qscale factor between IP and B-frames
662e5411 1043 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1044 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
f5bccd85 1045 * - encoding: Set by user.
64863965 1046 * - decoding: unused
b71901e6
MN
1047 */
1048 float b_quant_factor;
115329f1 1049
b71901e6
MN
1050 /** obsolete FIXME remove */
1051 int rc_strategy;
64b7c5b6
MN
1052#define FF_RC_STRATEGY_XVID 1
1053
8b4c7dbc 1054 int b_frame_strategy;
9dbcbd92 1055
b71901e6 1056 /**
f5bccd85 1057 * hurry up amount
64863965 1058 * - encoding: unused
f5bccd85 1059 * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
f9ec0aa1 1060 * @deprecated Deprecated in favor of skip_idct and skip_frame.
b71901e6
MN
1061 */
1062 int hurry_up;
115329f1 1063
de6d9b64 1064 struct AVCodec *codec;
115329f1 1065
de6d9b64
FB
1066 void *priv_data;
1067
bb628dae 1068 int rtp_payload_size; /* The size of the RTP payload: the coder will */
f5bccd85 1069 /* do its best to deliver a chunk with size */
644d98a4 1070 /* below rtp_payload_size, the chunk will start */
f5bccd85 1071 /* with a start code on some codecs like H.263. */
644d98a4 1072 /* This doesn't take account of any particular */
f5bccd85 1073 /* headers inside the transmitted RTP payload. */
81401c1f 1074
115329f1 1075
f5bccd85
DB
1076 /* The RTP callback: This function is called */
1077 /* every time the encoder has a packet to send. */
1078 /* It depends on the encoder if the data starts */
1079 /* with a Start Code (it should). H.263 does. */
1080 /* mb_nb contains the number of macroblocks */
1081 /* encoded in the RTP payload. */
115329f1 1082 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
81401c1f 1083
098eefe1
MN
1084 /* statistics, used for 2-pass encoding */
1085 int mv_bits;
1086 int header_bits;
1087 int i_tex_bits;
1088 int p_tex_bits;
1089 int i_count;
1090 int p_count;
1091 int skip_count;
b71901e6 1092 int misc_bits;
115329f1 1093
b71901e6 1094 /**
f5bccd85
DB
1095 * number of bits used for the previously encoded frame
1096 * - encoding: Set by libavcodec.
7004ffb3 1097 * - decoding: unused
b71901e6 1098 */
098eefe1 1099 int frame_bits;
7004ffb3 1100
b71901e6 1101 /**
f5bccd85
DB
1102 * Private data of the user, can be used to carry app specific stuff.
1103 * - encoding: Set by user.
1104 * - decoding: Set by user.
b71901e6
MN
1105 */
1106 void *opaque;
1107
de6d9b64 1108 char codec_name[32];
4a663d80
PG
1109 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1110 enum CodecID codec_id; /* see CODEC_ID_xxx */
115329f1 1111
7004ffb3
MN
1112 /**
1113 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
f5bccd85
DB
1114 * This is used to work around some encoder bugs.
1115 * A demuxer should set this to what is stored in the field used to identify the codec.
1116 * If there are multiple such fields in a container then the demuxer should choose the one
1117 * which maximizes the information about the used codec.
1118 * If the codec tag field in a container is larger then 32 bits then the demuxer should
1119 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
47bbf8a7 1120 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
f5bccd85
DB
1121 * first.
1122 * - encoding: Set by user, if not then the default based on codec_id will be used.
1123 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
7004ffb3
MN
1124 */
1125 unsigned int codec_tag;
115329f1 1126
b71901e6 1127 /**
f5bccd85
DB
1128 * Work around bugs in encoders which sometimes cannot be detected automatically.
1129 * - encoding: Set by user
1130 * - decoding: Set by user
b71901e6
MN
1131 */
1132 int workaround_bugs;
64863965 1133#define FF_BUG_AUTODETECT 1 ///< autodetection
4d2858de
MN
1134#define FF_BUG_OLD_MSMPEG4 2
1135#define FF_BUG_XVID_ILACE 4
1136#define FF_BUG_UMP4 8
1137#define FF_BUG_NO_PADDING 16
3116cb14 1138#define FF_BUG_AMV 32
f5bccd85 1139#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
03e93d35 1140#define FF_BUG_QPEL_CHROMA 64
db794953 1141#define FF_BUG_STD_QPEL 128
36df8805 1142#define FF_BUG_QPEL_CHROMA2 256
c40c3482 1143#define FF_BUG_DIRECT_BLOCKSIZE 512
1c6dcb0f 1144#define FF_BUG_EDGE 1024
b44bdf7e 1145#define FF_BUG_HPEL_CHROMA 2048
4ccde216 1146#define FF_BUG_DC_CLIP 4096
f5bccd85
DB
1147#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
1148//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
115329f1 1149
b71901e6 1150 /**
f5bccd85
DB
1151 * luma single coefficient elimination threshold
1152 * - encoding: Set by user.
64863965 1153 * - decoding: unused
b71901e6 1154 */
1f6b6e50 1155 int luma_elim_threshold;
115329f1 1156
b71901e6 1157 /**
f5bccd85
DB
1158 * chroma single coeff elimination threshold
1159 * - encoding: Set by user.
64863965 1160 * - decoding: unused
b71901e6 1161 */
1f6b6e50 1162 int chroma_elim_threshold;
115329f1 1163
b71901e6 1164 /**
f5bccd85
DB
1165 * strictly follow the standard (MPEG4, ...).
1166 * - encoding: Set by user.
5771b2c3
MN
1167 * - decoding: Set by user.
1168 * Setting this to STRICT or higher means the encoder and decoder will
1169 * generally do stupid things. While setting it to inofficial or lower
1170 * will mean the encoder might use things that are not supported by all
1171 * spec compliant decoders. Decoders make no difference between normal,
1172 * inofficial and experimental, that is they always try to decode things
1173 * when they can unless they are explicitly asked to behave stupid
1174 * (=strictly conform to the specs)
b71901e6
MN
1175 */
1176 int strict_std_compliance;
f5bccd85
DB
1177#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to a older more strict version of the spec or reference software.
1178#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
9cd81798 1179#define FF_COMPLIANCE_NORMAL 0
f5bccd85
DB
1180#define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions.
1181#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
9cd81798 1182
b71901e6 1183 /**
f5bccd85 1184 * qscale offset between IP and B-frames
f5bccd85 1185 * - encoding: Set by user.
64863965 1186 * - decoding: unused
b71901e6
MN
1187 */
1188 float b_quant_offset;
115329f1 1189
b71901e6 1190 /**
047599a4 1191 * Error recognization; higher values will detect more errors but may
f5bccd85 1192 * misdetect some more or less valid parts as errors.
64863965 1193 * - encoding: unused
f5bccd85 1194 * - decoding: Set by user.
b71901e6 1195 */
047599a4 1196 int error_recognition;
1471c6c2 1197#define FF_ER_CAREFUL 1
ce3bcaed
MN
1198#define FF_ER_COMPLIANT 2
1199#define FF_ER_AGGRESSIVE 3
1200#define FF_ER_VERY_AGGRESSIVE 4
115329f1 1201
6b72ac63 1202 /**
f5bccd85
DB
1203 * Called at the beginning of each frame to get a buffer for it.
1204 * If pic.reference is set then the frame will be read later by libavcodec.
2b5296d2 1205 * avcodec_align_dimensions() should be used to find the required width and
f5bccd85 1206 * height, as they normally need to be rounded up to the next multiple of 16.
64863965 1207 * - encoding: unused
f5bccd85 1208 * - decoding: Set by libavcodec., user can override.
b71901e6 1209 */
492cd3a9 1210 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
115329f1 1211
b71901e6 1212 /**
69b192ac 1213 * Called to release buffers which were allocated with get_buffer.
f5bccd85
DB
1214 * A released buffer can be reused in get_buffer().
1215 * pic.data[*] must be set to NULL.
64863965 1216 * - encoding: unused
f5bccd85 1217 * - decoding: Set by libavcodec., user can override.
b71901e6 1218 */
492cd3a9 1219 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
0fd90455 1220
b71901e6 1221 /**
eb8a25c8 1222 * Size of the frame reordering buffer in the decoder.
2d7b0560 1223 * For MPEG-2 it is 1 IPB or 0 low delay IP.
f5bccd85
DB
1224 * - encoding: Set by libavcodec.
1225 * - decoding: Set by libavcodec.
b71901e6
MN
1226 */
1227 int has_b_frames;
718b27a7
MN
1228
1229 /**
1230 * number of bytes per packet if constant and known or 0
f5bccd85 1231 * Used by some WAV based audio codecs.
718b27a7
MN
1232 */
1233 int block_align;
115329f1 1234
f5bccd85 1235 int parse_only; /* - decoding only: If true, only parsing is done
917e06c8
FB
1236 (function avcodec_parse_frame()). The frame
1237 data is returned. Only MPEG codecs support this now. */
115329f1 1238
b71901e6 1239 /**
f5bccd85
DB
1240 * 0-> h263 quant 1-> mpeg quant
1241 * - encoding: Set by user.
64863965 1242 * - decoding: unused
b71901e6
MN
1243 */
1244 int mpeg_quant;
115329f1 1245
b71901e6 1246 /**
f5bccd85
DB
1247 * pass1 encoding statistics output buffer
1248 * - encoding: Set by libavcodec.
64863965 1249 * - decoding: unused
b71901e6 1250 */
64863965 1251 char *stats_out;
115329f1 1252
b71901e6 1253 /**
f5bccd85
DB
1254 * pass2 encoding statistics input buffer
1255 * Concatenated stuff from stats_out of pass1 should be placed here.
1256 * - encoding: Allocated/set/freed by user.
64863965 1257 * - decoding: unused
b71901e6
MN
1258 */
1259 char *stats_in;
115329f1 1260
b71901e6 1261 /**
f5bccd85
DB
1262 * ratecontrol qmin qmax limiting method
1263 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1264 * - encoding: Set by user.
64863965 1265 * - decoding: unused
b71901e6 1266 */
ce980a95 1267 float rc_qsquish;
b71901e6 1268
ce980a95
MN
1269 float rc_qmod_amp;
1270 int rc_qmod_freq;
115329f1 1271
b71901e6 1272 /**
f5bccd85
DB
1273 * ratecontrol override, see RcOverride
1274 * - encoding: Allocated/set/freed by user.
64863965 1275 * - decoding: unused
b71901e6 1276 */
ce980a95
MN
1277 RcOverride *rc_override;
1278 int rc_override_count;
115329f1 1279
b71901e6 1280 /**
f5bccd85
DB
1281 * rate control equation
1282 * - encoding: Set by user
64863965 1283 * - decoding: unused
b71901e6 1284 */
6881b8e5 1285 const char *rc_eq;
115329f1 1286
b71901e6 1287 /**
f5bccd85
DB
1288 * maximum bitrate
1289 * - encoding: Set by user.
64863965 1290 * - decoding: unused
b71901e6 1291 */
ce980a95 1292 int rc_max_rate;
115329f1 1293
b71901e6 1294 /**
f5bccd85
DB
1295 * minimum bitrate
1296 * - encoding: Set by user.
64863965 1297 * - decoding: unused
b71901e6 1298 */
ce980a95 1299 int rc_min_rate;
115329f1 1300
b71901e6 1301 /**
f5bccd85
DB
1302 * decoder bitstream buffer size
1303 * - encoding: Set by user.
64863965 1304 * - decoding: unused
b71901e6 1305 */
ce980a95
MN
1306 int rc_buffer_size;
1307 float rc_buffer_aggressivity;
b71901e6
MN
1308
1309 /**
f5bccd85
DB
1310 * qscale factor between P and I-frames
1311 * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1312 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1313 * - encoding: Set by user.
64863965 1314 * - decoding: unused
b71901e6
MN
1315 */
1316 float i_quant_factor;
115329f1 1317
b71901e6 1318 /**
f5bccd85
DB
1319 * qscale offset between P and I-frames
1320 * - encoding: Set by user.
64863965 1321 * - decoding: unused
b71901e6
MN
1322 */
1323 float i_quant_offset;
115329f1 1324
b71901e6 1325 /**
f5bccd85
DB
1326 * initial complexity for pass1 ratecontrol
1327 * - encoding: Set by user.
64863965 1328 * - decoding: unused
b71901e6 1329 */
ce980a95 1330 float rc_initial_cplx;
917e06c8 1331
b71901e6 1332 /**
f5bccd85
DB
1333 * DCT algorithm, see FF_DCT_* below
1334 * - encoding: Set by user.
64863965 1335 * - decoding: unused
b71901e6 1336 */
28db7fce 1337 int dct_algo;
c7e07931 1338#define FF_DCT_AUTO 0
28db7fce 1339#define FF_DCT_FASTINT 1
c7e07931
MO
1340#define FF_DCT_INT 2
1341#define FF_DCT_MMX 3
1342#define FF_DCT_MLIB 4
05c4072b 1343#define FF_DCT_ALTIVEC 5
65e4c8c9 1344#define FF_DCT_FAAN 6
115329f1 1345
c5d309f2 1346 /**
f5bccd85
DB
1347 * luminance masking (0-> disabled)
1348 * - encoding: Set by user.
64863965 1349 * - decoding: unused
c5d309f2
MN
1350 */
1351 float lumi_masking;
115329f1 1352
c5d309f2 1353 /**
f5bccd85
DB
1354 * temporary complexity masking (0-> disabled)
1355 * - encoding: Set by user.
64863965 1356 * - decoding: unused
c5d309f2
MN
1357 */
1358 float temporal_cplx_masking;
115329f1 1359
c5d309f2 1360 /**
f5bccd85
DB
1361 * spatial complexity masking (0-> disabled)
1362 * - encoding: Set by user.
64863965 1363 * - decoding: unused
c5d309f2
MN
1364 */
1365 float spatial_cplx_masking;
115329f1 1366
c5d309f2 1367 /**
f5bccd85
DB
1368 * p block masking (0-> disabled)
1369 * - encoding: Set by user.
64863965 1370 * - decoding: unused
c5d309f2
MN
1371 */
1372 float p_masking;
15415af4 1373
5e746b99 1374 /**
f5bccd85
DB
1375 * darkness masking (0-> disabled)
1376 * - encoding: Set by user.
64863965 1377 * - decoding: unused
5e746b99
MN
1378 */
1379 float dark_masking;
115329f1 1380
0c2dd16e 1381 /**
f5bccd85
DB
1382 * IDCT algorithm, see FF_IDCT_* below.
1383 * - encoding: Set by user.
1384 * - decoding: Set by user.
2ad1516a
MN
1385 */
1386 int idct_algo;
273b0cd3
DB
1387#define FF_IDCT_AUTO 0
1388#define FF_IDCT_INT 1
1389#define FF_IDCT_SIMPLE 2
1390#define FF_IDCT_SIMPLEMMX 3
1391#define FF_IDCT_LIBMPEG2MMX 4
1392#define FF_IDCT_PS2 5
1393#define FF_IDCT_MLIB 6
1394#define FF_IDCT_ARM 7
1395#define FF_IDCT_ALTIVEC 8
1396#define FF_IDCT_SH4 9
1397#define FF_IDCT_SIMPLEARM 10
1398#define FF_IDCT_H264 11
1399#define FF_IDCT_VP3 12
1400#define FF_IDCT_IPP 13
1401#define FF_IDCT_XVIDMMX 14
1402#define FF_IDCT_CAVS 15
a0403006 1403#define FF_IDCT_SIMPLEARMV5TE 16
273b0cd3 1404#define FF_IDCT_SIMPLEARMV6 17
d9420d4d 1405#define FF_IDCT_SIMPLEVIS 18
9abc7e0f 1406#define FF_IDCT_WMV2 19
6f08c541 1407#define FF_IDCT_FAAN 20
42b30357 1408#define FF_IDCT_EA 21
7eec4328 1409#define FF_IDCT_SIMPLENEON 22
74c47463 1410#define FF_IDCT_SIMPLEALPHA 23
2ad1516a 1411
144f0625 1412 /**
f5bccd85
DB
1413 * slice count
1414 * - encoding: Set by libavcodec.
1415 * - decoding: Set by user (or 0).
144f0625
MN
1416 */
1417 int slice_count;
1418 /**
f5bccd85
DB
1419 * slice offsets in the frame in bytes
1420 * - encoding: Set/allocated by libavcodec.
1421 * - decoding: Set/allocated by user (or NULL).
144f0625
MN
1422 */
1423 int *slice_offset;
1424
4d2858de 1425 /**
f5bccd85 1426 * error concealment flags
64863965 1427 * - encoding: unused
f5bccd85 1428 * - decoding: Set by user.
4d2858de
MN
1429 */
1430 int error_concealment;
1431#define FF_EC_GUESS_MVS 1
1432#define FF_EC_DEBLOCK 2
1433
6b72ac63 1434 /**
bec89a84 1435 * dsp_mask could be add used to disable unwanted CPU features
8350df97 1436 * CPU features (i.e. MMX, SSE. ...)
bec89a84 1437 *
f5bccd85
DB
1438 * With the FORCE flag you may instead enable given CPU features.
1439 * (Dangerous: Usable in case of misdetection, improper usage however will
1440 * result into program crash.)
bec89a84
ZK
1441 */
1442 unsigned dsp_mask;
f5bccd85 1443#define FF_MM_FORCE 0x80000000 /* Force usage of selected flags (OR) */
bec89a84 1444 /* lower 16 bits - CPU features */
0cd60abf
MN
1445#define FF_MM_MMX 0x0001 ///< standard MMX
1446#define FF_MM_3DNOW 0x0004 ///< AMD 3DNOW
1447#define FF_MM_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
1448#define FF_MM_SSE 0x0008 ///< SSE functions
1449#define FF_MM_SSE2 0x0010 ///< PIV SSE2 functions
1450#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1451#define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions
1452#define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions
1453#define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT
82d1605f 1454#define FF_MM_ALTIVEC 0x0001 ///< standard AltiVec
11f18faf
MN
1455
1456 /**
64863965 1457 * bits per sample/pixel from the demuxer (needed for huffyuv).
f5bccd85
DB
1458 * - encoding: Set by libavcodec.
1459 * - decoding: Set by user.
11f18faf 1460 */
46a73068 1461 int bits_per_coded_sample;
115329f1 1462
11f18faf 1463 /**
f5bccd85
DB
1464 * prediction method (needed for huffyuv)
1465 * - encoding: Set by user.
64863965 1466 * - decoding: unused
11f18faf
MN
1467 */
1468 int prediction_method;
1469#define FF_PRED_LEFT 0
1470#define FF_PRED_PLANE 1
1471#define FF_PRED_MEDIAN 2
115329f1 1472
5d3cea3a 1473 /**
f5bccd85 1474 * sample aspect ratio (0 if unknown)
8e5af7a6 1475 * That is the width of a pixel divided by the height of the pixel.
f5bccd85
DB
1476 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1477 * - encoding: Set by user.
1478 * - decoding: Set by libavcodec.
5d3cea3a 1479 */
5ff85f1d 1480 AVRational sample_aspect_ratio;
1e491e29
MN
1481
1482 /**
f5bccd85
DB
1483 * the picture in the bitstream
1484 * - encoding: Set by libavcodec.
1485 * - decoding: Set by libavcodec.
1e491e29 1486 */
492cd3a9 1487 AVFrame *coded_frame;
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1488
1489 /**
f5bccd85
DB
1490 * debug
1491 * - encoding: Set by user.
1492 * - decoding: Set by user.
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1493 */
1494 int debug;
273b0cd3
DB
1495#define FF_DEBUG_PICT_INFO 1
1496#define FF_DEBUG_RC 2
1497#define FF_DEBUG_BITSTREAM 4
1498#define FF_DEBUG_MB_TYPE 8
1499#define FF_DEBUG_QP 16
1500#define FF_DEBUG_MV 32
1501#define FF_DEBUG_DCT_COEFF 0x00000040
1502#define FF_DEBUG_SKIP 0x00000080
1503#define FF_DEBUG_STARTCODE 0x00000100
1504#define FF_DEBUG_PTS 0x00000200
1505#define FF_DEBUG_ER 0x00000400
1506#define FF_DEBUG_MMCO 0x00000800
1507#define FF_DEBUG_BUGS 0x00001000
1508#define FF_DEBUG_VIS_QP 0x00002000
864119b6 1509#define FF_DEBUG_VIS_MB_TYPE 0x00004000
385c820b 1510#define FF_DEBUG_BUFFERS 0x00008000
115329f1 1511
140cb663 1512 /**
f5bccd85
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1513 * debug
1514 * - encoding: Set by user.
1515 * - decoding: Set by user.
0c9bbaec
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1516 */
1517 int debug_mv;
1518#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1519#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1520#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1521
1522 /**
f5bccd85
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1523 * error
1524 * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
64863965 1525 * - decoding: unused
140cb663
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1526 */
1527 uint64_t error[4];
115329f1 1528
17a70fde 1529 /**
f5bccd85 1530 * minimum MB quantizer
6e0d8c06 1531 * - encoding: unused
64863965 1532 * - decoding: unused
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1533 */
1534 int mb_qmin;
1535
1536 /**
f5bccd85 1537 * maximum MB quantizer
6e0d8c06 1538 * - encoding: unused
64863965 1539 * - decoding: unused
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1540 */
1541 int mb_qmax;
115329f1 1542
1457ab52 1543 /**
f5bccd85
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1544 * motion estimation comparison function
1545 * - encoding: Set by user.
64863965 1546 * - decoding: unused
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1547 */
1548 int me_cmp;
1549 /**
f5bccd85
DB
1550 * subpixel motion estimation comparison function
1551 * - encoding: Set by user.
64863965 1552 * - decoding: unused
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MN
1553 */
1554 int me_sub_cmp;
1555 /**
f5bccd85
DB
1556 * macroblock comparison function (not supported yet)
1557 * - encoding: Set by user.
64863965 1558 * - decoding: unused
1457ab52
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1559 */
1560 int mb_cmp;
622348f9 1561 /**
f5bccd85
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1562 * interlaced DCT comparison function
1563 * - encoding: Set by user.
622348f9
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1564 * - decoding: unused
1565 */
1566 int ildct_cmp;
273b0cd3
DB
1567#define FF_CMP_SAD 0
1568#define FF_CMP_SSE 1
1569#define FF_CMP_SATD 2
1570#define FF_CMP_DCT 3
1571#define FF_CMP_PSNR 4
1572#define FF_CMP_BIT 5
1573#define FF_CMP_RD 6
1574#define FF_CMP_ZERO 7
1575#define FF_CMP_VSAD 8
1576#define FF_CMP_VSSE 9
1577#define FF_CMP_NSSE 10
1578#define FF_CMP_W53 11
1579#define FF_CMP_W97 12
0fd6aea1 1580#define FF_CMP_DCTMAX 13
27c61ac5 1581#define FF_CMP_DCT264 14
1457ab52 1582#define FF_CMP_CHROMA 256
115329f1 1583
1457ab52 1584 /**
f5bccd85
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1585 * ME diamond size & shape
1586 * - encoding: Set by user.
64863965 1587 * - decoding: unused
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1588 */
1589 int dia_size;
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MN
1590
1591 /**
f5bccd85
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1592 * amount of previous MV predictors (2a+1 x 2a+1 square)
1593 * - encoding: Set by user.
64863965 1594 * - decoding: unused
b07a5980
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1595 */
1596 int last_predictor_count;
70ac76c0 1597
f5fb6b34 1598 /**
f5bccd85
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1599 * prepass for motion estimation
1600 * - encoding: Set by user.
64863965 1601 * - decoding: unused
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1602 */
1603 int pre_me;
b07a5980 1604
70ac76c0 1605 /**
f5bccd85
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1606 * motion estimation prepass comparison function
1607 * - encoding: Set by user.
64863965 1608 * - decoding: unused
70ac76c0
MN
1609 */
1610 int me_pre_cmp;
826f429a 1611
70ac76c0 1612 /**
f5bccd85
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1613 * ME prepass diamond size & shape
1614 * - encoding: Set by user.
64863965 1615 * - decoding: unused
70ac76c0
MN
1616 */
1617 int pre_dia_size;
1618
826f429a 1619 /**
f5bccd85
DB
1620 * subpel ME quality
1621 * - encoding: Set by user.
64863965 1622 * - decoding: unused
826f429a
MN
1623 */
1624 int me_subpel_quality;
1625
a33c7159 1626 /**
f5bccd85 1627 * callback to negotiate the pixelFormat
a33c7159 1628 * @param fmt is the list of formats which are supported by the codec,
f5bccd85
DB
1629 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1630 * The first is always the native one.
1631 * @return the chosen format
64863965 1632 * - encoding: unused
f5bccd85 1633 * - decoding: Set by user, if not set the native format will be chosen.
a33c7159 1634 */
494c56d3 1635 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
e2f9490e
FB
1636
1637 /**
f5bccd85
DB
1638 * DTG active format information (additional aspect ratio
1639 * information only used in DVB MPEG-2 transport streams)
1640 * 0 if not set.
115329f1 1641 *
f5bccd85
DB
1642 * - encoding: unused
1643 * - decoding: Set by decoder.
e2f9490e
FB
1644 */
1645 int dtg_active_format;
1646#define FF_DTG_AFD_SAME 8
1647#define FF_DTG_AFD_4_3 9
1648#define FF_DTG_AFD_16_9 10
1649#define FF_DTG_AFD_14_9 11
1650#define FF_DTG_AFD_4_3_SP_14_9 13
1651#define FF_DTG_AFD_16_9_SP_14_9 14
1652#define FF_DTG_AFD_SP_4_3 15
1653
ebbcdc9a 1654 /**
f5bccd85
DB
1655 * maximum motion estimation search range in subpel units
1656 * If 0 then no limit.
115329f1 1657 *
f5bccd85
DB
1658 * - encoding: Set by user.
1659 * - decoding: unused
ebbcdc9a 1660 */
59e0ac8e 1661 int me_range;
ebbcdc9a 1662
65f7062d 1663 /**
f5bccd85
DB
1664 * intra quantizer bias
1665 * - encoding: Set by user.
1984f635
MN
1666 * - decoding: unused
1667 */
1668 int intra_quant_bias;
1669#define FF_DEFAULT_QUANT_BIAS 999999
115329f1 1670
1984f635 1671 /**
f5bccd85
DB
1672 * inter quantizer bias
1673 * - encoding: Set by user.
1984f635
MN
1674 * - decoding: unused
1675 */
1676 int inter_quant_bias;
5cd62665
ZK
1677
1678 /**
f5bccd85
DB
1679 * color table ID
1680 * - encoding: unused
1681 * - decoding: Which clrtable should be used for 8bit RGB images.
1682 * Tables have to be stored somewhere. FIXME
5cd62665
ZK
1683 */
1684 int color_table_id;
115329f1 1685
d90cf87b 1686 /**
f5bccd85
DB
1687 * internal_buffer count
1688 * Don't touch, used by libavcodec default_get_buffer().
d90cf87b
MN
1689 */
1690 int internal_buffer_count;
115329f1 1691
d90cf87b 1692 /**
f5bccd85
DB
1693 * internal_buffers
1694 * Don't touch, used by libavcodec default_get_buffer().
d90cf87b
MN
1695 */
1696 void *internal_buffer;
158c7f05
MN
1697
1698#define FF_LAMBDA_SHIFT 7
1699#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1700#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1701#define FF_LAMBDA_MAX (256*128-1)
1702
1703#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
3d2e8cce 1704 /**
f5bccd85
DB
1705 * Global quality for codecs which cannot change it per frame.
1706 * This should be proportional to MPEG-1/2/4 qscale.
1707 * - encoding: Set by user.
3d2e8cce
MN
1708 * - decoding: unused
1709 */
1710 int global_quality;
115329f1 1711
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MN
1712#define FF_CODER_TYPE_VLC 0
1713#define FF_CODER_TYPE_AC 1
f87459e4
KN
1714#define FF_CODER_TYPE_RAW 2
1715#define FF_CODER_TYPE_RLE 3
1716#define FF_CODER_TYPE_DEFLATE 4
11e659c2
MN
1717 /**
1718 * coder type
f5bccd85 1719 * - encoding: Set by user.
11e659c2
MN
1720 * - decoding: unused
1721 */
1722 int coder_type;
1723
1724 /**
1725 * context model
f5bccd85 1726 * - encoding: Set by user.
11e659c2
MN
1727 * - decoding: unused
1728 */
1729 int context_model;
5639729b
MN
1730#if 0
1731 /**
1732 *
1733 * - encoding: unused
f5bccd85 1734 * - decoding: Set by user.
5639729b
MN
1735 */
1736 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1737#endif
115329f1 1738
3bb07d61
MN
1739 /**
1740 * slice flags
1741 * - encoding: unused
f5bccd85 1742 * - decoding: Set by user.
3bb07d61
MN
1743 */
1744 int slice_flags;
1745#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1746#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1747#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1748
fb364ada
IK
1749 /**
1750 * XVideo Motion Acceleration
1751 * - encoding: forbidden
1752 * - decoding: set by decoder
1753 */
1754 int xvmc_acceleration;
115329f1 1755
7d1c3fc1
MN
1756 /**
1757 * macroblock decision mode
f5bccd85 1758 * - encoding: Set by user.
7d1c3fc1
MN
1759 * - decoding: unused
1760 */
1761 int mb_decision;
1762#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1763#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
e6dba5df 1764#define FF_MB_DECISION_RD 2 ///< rate distortion
d6eb3c50
MN
1765
1766 /**
1767 * custom intra quantization matrix
f5bccd85
DB
1768 * - encoding: Set by user, can be NULL.
1769 * - decoding: Set by libavcodec.
d6eb3c50
MN
1770 */
1771 uint16_t *intra_matrix;
1772
1773 /**
1774 * custom inter quantization matrix
f5bccd85
DB
1775 * - encoding: Set by user, can be NULL.
1776 * - decoding: Set by libavcodec.
d6eb3c50
MN
1777 */
1778 uint16_t *inter_matrix;
115329f1 1779
541ae140
MN
1780 /**
1781 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
f5bccd85 1782 * This is used to work around some encoder bugs.
541ae140 1783 * - encoding: unused
f5bccd85 1784 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
541ae140
MN
1785 */
1786 unsigned int stream_codec_tag;
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MN
1787
1788 /**
f5bccd85
DB
1789 * scene change detection threshold
1790 * 0 is default, larger means fewer detected scene changes.
1791 * - encoding: Set by user.
05fbd0a2
MN
1792 * - decoding: unused
1793 */
1794 int scenechange_threshold;
158c7f05
MN
1795
1796 /**
f5bccd85
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1797 * minimum Lagrange multipler
1798 * - encoding: Set by user.
158c7f05
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1799 * - decoding: unused
1800 */
1801 int lmin;
1802
1803 /**
f5bccd85
DB
1804 * maximum Lagrange multipler
1805 * - encoding: Set by user.
158c7f05
MN
1806 * - decoding: unused
1807 */
1808 int lmax;
2a2bbcb0
MM
1809
1810 /**
f5bccd85 1811 * palette control structure
2a2bbcb0 1812 * - encoding: ??? (no palette-enabled encoder yet)
f5bccd85 1813 * - decoding: Set by user.
2a2bbcb0
MM
1814 */
1815 struct AVPaletteControl *palctrl;
821cb11f
MN
1816
1817 /**
1818 * noise reduction strength
f5bccd85 1819 * - encoding: Set by user.
821cb11f
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1820 * - decoding: unused
1821 */
1822 int noise_reduction;
115329f1 1823
074c4ca7 1824 /**
f5bccd85
DB
1825 * Called at the beginning of a frame to get cr buffer for it.
1826 * Buffer type (size, hints) must be the same. libavcodec won't check it.
1827 * libavcodec will pass previous buffer in pic, function should return
e1c2a5a0 1828 * same buffer or new buffer with old frame "painted" into it.
f5bccd85 1829 * If pic.data[0] == NULL must behave like get_buffer().
074c4ca7 1830 * - encoding: unused
f5bccd85 1831 * - decoding: Set by libavcodec., user can override
074c4ca7 1832 */
e1c2a5a0 1833 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
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MN
1834
1835 /**
f5bccd85
DB
1836 * Number of bits which should be loaded into the rc buffer before decoding starts.
1837 * - encoding: Set by user.
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1838 * - decoding: unused
1839 */
1840 int rc_initial_buffer_occupancy;
1841
1842 /**
1843 *
f5bccd85 1844 * - encoding: Set by user.
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MN
1845 * - decoding: unused
1846 */
1847 int inter_threshold;
1848
1849 /**
f5bccd85
DB
1850 * CODEC_FLAG2_*
1851 * - encoding: Set by user.
1852 * - decoding: Set by user.
ba58dabc
MN
1853 */
1854 int flags2;
7ebfc0ea
MN
1855
1856 /**
f5bccd85
DB
1857 * Simulates errors in the bitstream to test error concealment.
1858 * - encoding: Set by user.
1859 * - decoding: unused
7ebfc0ea
MN
1860 */
1861 int error_rate;
115329f1 1862
a1e257b2
MN
1863 /**
1864 * MP3 antialias algorithm, see FF_AA_* below.
1865 * - encoding: unused
f5bccd85 1866 * - decoding: Set by user.
a1e257b2
MN
1867 */
1868 int antialias_algo;
1869#define FF_AA_AUTO 0
1870#define FF_AA_FASTINT 1 //not implemented yet
1871#define FF_AA_INT 2
1872#define FF_AA_FLOAT 3
77ea0d4b 1873 /**
f5bccd85
DB
1874 * quantizer noise shaping
1875 * - encoding: Set by user.
77ea0d4b
MN
1876 * - decoding: unused
1877 */
1878 int quantizer_noise_shaping;
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MN
1879
1880 /**
f5bccd85 1881 * thread count
eafcac6a 1882 * is used to decide how many independent tasks should be passed to execute()
f5bccd85
DB
1883 * - encoding: Set by user.
1884 * - decoding: Set by user.
9c3d33d6
MN
1885 */
1886 int thread_count;
115329f1 1887
9c3d33d6 1888 /**
f5bccd85
DB
1889 * The codec may call this to execute several independent things.
1890 * It will return only after finishing all tasks.
1891 * The user may replace this with some multithreaded implementation,
1892 * the default implementation will execute the parts serially.
399cec2f 1893 * @param count the number of things to execute
f5bccd85
DB
1894 * - encoding: Set by libavcodec, user can override.
1895 * - decoding: Set by libavcodec, user can override.
9c3d33d6 1896 */
3a84713a 1897 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
115329f1 1898
9c3d33d6 1899 /**
f5bccd85
DB
1900 * thread opaque
1901 * Can be used by execute() to store some per AVCodecContext stuff.
9c3d33d6
MN
1902 * - encoding: set by execute()
1903 * - decoding: set by execute()
1904 */
1905 void *thread_opaque;
a4d36c11
MN
1906
1907 /**
f5bccd85
DB
1908 * Motion estimation threshold below which no motion estimation is
1909 * performed, but instead the user specified motion vectors are used.
115329f1 1910 *
f5bccd85 1911 * - encoding: Set by user.
f20f8a8b 1912 * - decoding: unused
a4d36c11 1913 */
2750b827 1914 int me_threshold;
f20f8a8b
MN
1915
1916 /**
f5bccd85
DB
1917 * Macroblock threshold below which the user specified macroblock types will be used.
1918 * - encoding: Set by user.
f20f8a8b
MN
1919 * - decoding: unused
1920 */
1921 int mb_threshold;
bf266e19
MN
1922
1923 /**
f5bccd85
DB
1924 * precision of the intra DC coefficient - 8
1925 * - encoding: Set by user.
bf266e19
MN
1926 * - decoding: unused
1927 */
1928 int intra_dc_precision;
d4c5d2ad
MN
1929
1930 /**
f5bccd85
DB
1931 * noise vs. sse weight for the nsse comparsion function
1932 * - encoding: Set by user.
d4c5d2ad
MN
1933 * - decoding: unused
1934 */
1935 int nsse_weight;
0dfd33c3
MN
1936
1937 /**
f5bccd85 1938 * Number of macroblock rows at the top which are skipped.
0dfd33c3 1939 * - encoding: unused
f5bccd85 1940 * - decoding: Set by user.
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MN
1941 */
1942 int skip_top;
1943
1944 /**
f5bccd85 1945 * Number of macroblock rows at the bottom which are skipped.
0dfd33c3 1946 * - encoding: unused
f5bccd85 1947 * - decoding: Set by user.
0dfd33c3
MN
1948 */
1949 int skip_bottom;
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MN
1950
1951 /**
1952 * profile
f5bccd85
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1953 * - encoding: Set by user.
1954 * - decoding: Set by libavcodec.
baced9f5
MN
1955 */
1956 int profile;
1957#define FF_PROFILE_UNKNOWN -99
4f2c36ac 1958#define FF_PROFILE_AAC_MAIN 0
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DB
1959#define FF_PROFILE_AAC_LOW 1
1960#define FF_PROFILE_AAC_SSR 2
1961#define FF_PROFILE_AAC_LTP 3
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MN
1962
1963 /**
1964 * level
f5bccd85
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1965 * - encoding: Set by user.
1966 * - decoding: Set by libavcodec.
baced9f5
MN
1967 */
1968 int level;
1969#define FF_LEVEL_UNKNOWN -99
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MN
1970
1971 /**
f5bccd85 1972 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
178fcca8 1973 * - encoding: unused
f5bccd85 1974 * - decoding: Set by user.
178fcca8
MN
1975 */
1976 int lowres;
21adafec
MN
1977
1978 /**
f5bccd85
DB
1979 * Bitstream width / height, may be different from width/height if lowres
1980 * or other things are used.
21adafec 1981 * - encoding: unused
f5bccd85 1982 * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
21adafec
MN
1983 */
1984 int coded_width, coded_height;
bbf18b21
MN
1985
1986 /**
1987 * frame skip threshold
f5bccd85 1988 * - encoding: Set by user.
bbf18b21
MN
1989 * - decoding: unused
1990 */
1991 int frame_skip_threshold;
1992
1993 /**
1994 * frame skip factor
f5bccd85 1995 * - encoding: Set by user.
bbf18b21
MN
1996 * - decoding: unused
1997 */
1998 int frame_skip_factor;
0fd6aea1
MN
1999
2000 /**
2001 * frame skip exponent
f5bccd85 2002 * - encoding: Set by user.
0fd6aea1
MN
2003 * - decoding: unused
2004 */
2005 int frame_skip_exp;
2006
2007 /**
f5bccd85
DB
2008 * frame skip comparison function
2009 * - encoding: Set by user.
0fd6aea1
MN
2010 * - decoding: unused
2011 */
2012 int frame_skip_cmp;
957c743a
CM
2013
2014 /**
f5bccd85 2015 * Border processing masking, raises the quantizer for mbs on the borders
957c743a 2016 * of the picture.
f5bccd85 2017 * - encoding: Set by user.
957c743a
CM
2018 * - decoding: unused
2019 */
2020 float border_masking;
6e0d8c06
MN
2021
2022 /**
f5bccd85
DB
2023 * minimum MB lagrange multipler
2024 * - encoding: Set by user.
6e0d8c06
MN
2025 * - decoding: unused
2026 */
2027 int mb_lmin;
2028
2029 /**
f5bccd85
DB
2030 * maximum MB lagrange multipler
2031 * - encoding: Set by user.
6e0d8c06
MN
2032 * - decoding: unused
2033 */
2034 int mb_lmax;
09c3e44e
MN
2035
2036 /**
115329f1 2037 *
f5bccd85 2038 * - encoding: Set by user.
09c3e44e
MN
2039 * - decoding: unused
2040 */
2041 int me_penalty_compensation;
8c3eba7c
MN
2042
2043 /**
115329f1 2044 *
8c3eba7c 2045 * - encoding: unused
f5bccd85 2046 * - decoding: Set by user.
8c3eba7c
MN
2047 */
2048 enum AVDiscard skip_loop_filter;
2049
2050 /**
115329f1 2051 *
8c3eba7c 2052 * - encoding: unused
f5bccd85 2053 * - decoding: Set by user.
8c3eba7c
MN
2054 */
2055 enum AVDiscard skip_idct;
2056
2057 /**
115329f1 2058 *
8c3eba7c 2059 * - encoding: unused
f5bccd85 2060 * - decoding: Set by user.
8c3eba7c
MN
2061 */
2062 enum AVDiscard skip_frame;
316a2ec8
MN
2063
2064 /**
2065 *
f5bccd85 2066 * - encoding: Set by user.
316a2ec8
MN
2067 * - decoding: unused
2068 */
2069 int bidir_refine;
e8501c93
MN
2070
2071 /**
2072 *
f5bccd85 2073 * - encoding: Set by user.
e8501c93
MN
2074 * - decoding: unused
2075 */
2076 int brd_scale;
58f7833e
RS
2077
2078 /**
2079 * constant rate factor - quality-based VBR - values ~correspond to qps
f5bccd85 2080 * - encoding: Set by user.
58f7833e
RS
2081 * - decoding: unused
2082 */
9f1c1c99 2083 float crf;
58f7833e
RS
2084
2085 /**
2086 * constant quantization parameter rate control method
f5bccd85 2087 * - encoding: Set by user.
58f7833e
RS
2088 * - decoding: unused
2089 */
2090 int cqp;
2091
2092 /**
f5bccd85
DB
2093 * minimum GOP size
2094 * - encoding: Set by user.
58f7833e
RS
2095 * - decoding: unused
2096 */
2097 int keyint_min;
2098
2099 /**
2100 * number of reference frames
f5bccd85 2101 * - encoding: Set by user.
53d55e9e 2102 * - decoding: Set by lavc.
58f7833e
RS
2103 */
2104 int refs;
2105
2106 /**
2107 * chroma qp offset from luma
f5bccd85 2108 * - encoding: Set by user.
58f7833e
RS
2109 * - decoding: unused
2110 */
2111 int chromaoffset;
2112
2113 /**
f5bccd85
DB
2114 * Influences how often B-frames are used.
2115 * - encoding: Set by user.
58f7833e
RS
2116 * - decoding: unused
2117 */
2118 int bframebias;
2119
2120 /**
2121 * trellis RD quantization
f5bccd85 2122 * - encoding: Set by user.
58f7833e
RS
2123 * - decoding: unused
2124 */
2125 int trellis;
2126
2127 /**
f5bccd85
DB
2128 * Reduce fluctuations in qp (before curve compression).
2129 * - encoding: Set by user.
58f7833e
RS
2130 * - decoding: unused
2131 */
2132 float complexityblur;
2133
2134 /**
2135 * in-loop deblocking filter alphac0 parameter
2136 * alpha is in the range -6...6
f5bccd85 2137 * - encoding: Set by user.
58f7833e
RS
2138 * - decoding: unused
2139 */
2140 int deblockalpha;
2141
2142 /**
2143 * in-loop deblocking filter beta parameter
2144 * beta is in the range -6...6
f5bccd85 2145 * - encoding: Set by user.
58f7833e
RS
2146 * - decoding: unused
2147 */
2148 int deblockbeta;
2149
2150 /**
2151 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
f5bccd85 2152 * - encoding: Set by user.
58f7833e
RS
2153 * - decoding: unused
2154 */
2155 int partitions;
56cc85a0
DB
2156#define X264_PART_I4X4 0x001 /* Analyze i4x4 */
2157#define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
2158#define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
2159#define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
2160#define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
58f7833e
RS
2161
2162 /**
30ab4ded 2163 * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
f5bccd85 2164 * - encoding: Set by user.
58f7833e
RS
2165 * - decoding: unused
2166 */
2167 int directpred;
4f59b684 2168
14f0c8e2 2169 /**
02c164c1 2170 * Audio cutoff bandwidth (0 means "automatic")
f5bccd85 2171 * - encoding: Set by user.
14f0c8e2
LA
2172 * - decoding: unused
2173 */
2174 int cutoff;
39a64e30
CH
2175
2176 /**
f5bccd85
DB
2177 * Multiplied by qscale for each frame and added to scene_change_score.
2178 * - encoding: Set by user.
39a64e30
CH
2179 * - decoding: unused
2180 */
2181 int scenechange_factor;
1dd509b1
MN
2182
2183 /**
2184 *
f5bccd85
DB
2185 * Note: Value depends upon the compare function used for fullpel ME.
2186 * - encoding: Set by user.
1dd509b1
MN
2187 * - decoding: unused
2188 */
2189 int mv0_threshold;
f9243d34
CH
2190
2191 /**
f5bccd85
DB
2192 * Adjusts sensitivity of b_frame_strategy 1.
2193 * - encoding: Set by user.
f9243d34
CH
2194 * - decoding: unused
2195 */
2196 int b_sensitivity;
a403fc03
JR
2197
2198 /**
f5bccd85 2199 * - encoding: Set by user.
a403fc03
JR
2200 * - decoding: unused
2201 */
2202 int compression_level;
2203#define FF_COMPRESSION_DEFAULT -1
2204
2205 /**
f5bccd85
DB
2206 * Sets whether to use LPC mode - used by FLAC encoder.
2207 * - encoding: Set by user.
2208 * - decoding: unused
a403fc03
JR
2209 */
2210 int use_lpc;
2211
2212 /**
2213 * LPC coefficient precision - used by FLAC encoder
f5bccd85
DB
2214 * - encoding: Set by user.
2215 * - decoding: unused
a403fc03
JR
2216 */
2217 int lpc_coeff_precision;
2218
2219 /**
f5bccd85
DB
2220 * - encoding: Set by user.
2221 * - decoding: unused
a403fc03
JR
2222 */
2223 int min_prediction_order;
2224
2225 /**
f5bccd85
DB
2226 * - encoding: Set by user.
2227 * - decoding: unused
a403fc03
JR
2228 */
2229 int max_prediction_order;
2230
2231 /**
2232 * search method for selecting prediction order
f5bccd85
DB
2233 * - encoding: Set by user.
2234 * - decoding: unused
a403fc03
JR
2235 */
2236 int prediction_order_method;
2237
2238 /**
f5bccd85
DB
2239 * - encoding: Set by user.
2240 * - decoding: unused
a403fc03
JR
2241 */
2242 int min_partition_order;
2243
2244 /**
f5bccd85
DB
2245 * - encoding: Set by user.
2246 * - decoding: unused
a403fc03
JR
2247 */
2248 int max_partition_order;
80d617f5
BC
2249
2250 /**
2251 * GOP timecode frame start number, in non drop frame format
f5bccd85
DB
2252 * - encoding: Set by user.
2253 * - decoding: unused
80d617f5
BC
2254 */
2255 int64_t timecode_frame_start;
b1ec601f 2256
0d72e7d0 2257#if LIBAVCODEC_VERSION_MAJOR < 53
b1ec601f
RD
2258 /**
2259 * Decoder should decode to this many channels if it can (0 for default)
2260 * - encoding: unused
2261 * - decoding: Set by user.
0d72e7d0 2262 * @deprecated Deprecated in favor of request_channel_layout.
b1ec601f
RD
2263 */
2264 int request_channels;
0d72e7d0 2265#endif
1408352a
JR
2266
2267 /**
2268 * Percentage of dynamic range compression to be applied by the decoder.
2269 * The default value is 1.0, corresponding to full compression.
2270 * - encoding: unused
2271 * - decoding: Set by user.
2272 */
2273 float drc_scale;
79de84f2
MN
2274
2275 /**
2276 * opaque 64bit number (generally a PTS) that will be reordered and
2277 * output in AVFrame.reordered_opaque
2278 * - encoding: unused
2279 * - decoding: Set by user.
2280 */
2281 int64_t reordered_opaque;
312420f3
PR
2282
2283 /**
2284 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2285 * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
2286 * - encoding: set by user.
2287 * - decoding: set by libavcodec.
2288 */
2289 int bits_per_raw_sample;
0d72e7d0
PR
2290
2291 /**
2292 * Audio channel layout.
2293 * - encoding: set by user.
2294 * - decoding: set by libavcodec.
2295 */
2296 int64_t channel_layout;
2297
2298 /**
2299 * Request decoder to use this channel layout if it can (0 for default)
2300 * - encoding: unused
2301 * - decoding: Set by user.
2302 */
2303 int64_t request_channel_layout;
3bff4d8b
BC
2304
2305 /**
2306 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2307 * - encoding: Set by user.
2308 * - decoding: unused.
2309 */
2310 float rc_max_available_vbv_use;
2311
2312 /**
2313 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2314 * - encoding: Set by user.
2315 * - decoding: unused.
2316 */
2317 float rc_min_vbv_overflow_use;
de6d9b64
FB
2318} AVCodecContext;
2319
64863965
MN
2320/**
2321 * AVCodec.
2322 */
de6d9b64 2323typedef struct AVCodec {
6b0cdb6e
NG
2324 /**
2325 * Name of the codec implementation.
2326 * The name is globally unique among encoders and among decoders (but an
2327 * encoder and a decoder can share the same name).
2328 * This is the primary way to find a codec from the user perspective.
2329 */
18f77016 2330 const char *name;
5d234974 2331 enum CodecType type;
9297ddd3 2332 enum CodecID id;
de6d9b64
FB
2333 int priv_data_size;
2334 int (*init)(AVCodecContext *);
0c1a9eda 2335 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
de6d9b64 2336 int (*close)(AVCodecContext *);
0fd90455 2337 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
6ddaa63c 2338 const uint8_t *buf, int buf_size);
a2d11246
MN
2339 /**
2340 * Codec capabilities.
2341 * see CODEC_CAP_*
2342 */
bf89e6b1 2343 int capabilities;
de6d9b64 2344 struct AVCodec *next;
c8cf325a
MN
2345 /**
2346 * Flush buffers.
2347 * Will be called when seeking
2348 */
7a06ff14 2349 void (*flush)(AVCodecContext *);
716e31ea 2350 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
1beb670a 2351 const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
fe4bf374
SS
2352 /**
2353 * Descriptive name for the codec, meant to be more human readable than \p name.
2354 * You \e should use the NULL_IF_CONFIG_SMALL() macro to define it.
2355 */
2356 const char *long_name;
3ade5d56 2357 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
88a07af7 2358 const enum SampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
0d72e7d0 2359 const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
de6d9b64
FB
2360} AVCodec;
2361
97d96aaa 2362/**
d7425f59
MN
2363 * four components are given, that's all.
2364 * the last component is alpha
2365 */
de6d9b64 2366typedef struct AVPicture {
0c1a9eda 2367 uint8_t *data[4];
cd394651 2368 int linesize[4]; ///< number of bytes per line
de6d9b64
FB
2369} AVPicture;
2370
ba118447
MM
2371/**
2372 * AVPaletteControl
2373 * This structure defines a method for communicating palette changes
2374 * between and demuxer and a decoder.
671adb17
MC
2375 *
2376 * @deprecated Use AVPacket to send palette changes instead.
2377 * This is totally broken.
ba118447 2378 */
2e99641b 2379#define AVPALETTE_SIZE 1024
432d84c3 2380#define AVPALETTE_COUNT 256
ba118447
MM
2381typedef struct AVPaletteControl {
2382
f5bccd85
DB
2383 /* Demuxer sets this to 1 to indicate the palette has changed;
2384 * decoder resets to 0. */
ba118447
MM
2385 int palette_changed;
2386
2a2bbcb0
MM
2387 /* 4-byte ARGB palette entries, stored in native byte order; note that
2388 * the individual palette components should be on a 8-bit scale; if
f5bccd85
DB
2389 * the palette data comes from an IBM VGA native format, the component
2390 * data is probably 6 bits in size and needs to be scaled. */
2e99641b 2391 unsigned int palette[AVPALETTE_COUNT];
ba118447 2392
18239edf 2393} AVPaletteControl attribute_deprecated;
ba118447 2394
c66216ed
MN
2395enum AVSubtitleType {
2396 SUBTITLE_NONE,
2397
2398 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
2399
2400 /**
2401 * Plain text, the text field must be set by the decoder and is
2402 * authoritative. ass and pict fields may contain approximations.
2403 */
2404 SUBTITLE_TEXT,
2405
2406 /**
2407 * Formatted text, the ass field must be set by the decoder and is
2408 * authoritative. pict and text fields may contain approximations.
2409 */
2410 SUBTITLE_ASS,
2411};
2412
c6ec28b1 2413typedef struct AVSubtitleRect {
ebc466bb
MN
2414 int x; ///< top left corner of pict, undefined when pict is not set
2415 int y; ///< top left corner of pict, undefined when pict is not set
2416 int w; ///< width of pict, undefined when pict is not set
2417 int h; ///< height of pict, undefined when pict is not set
2418 int nb_colors; ///< number of colors in pict, undefined when pict is not set
25b4c651
MN
2419
2420 /**
2421 * data+linesize for the bitmap of this subtitle.
2422 * can be set for text/ass as well once they where rendered
2423 */
2424 AVPicture pict;
f656106f
MN
2425 enum AVSubtitleType type;
2426
2427 char *text; ///< 0 terminated plain UTF-8 text
2428
2429 /**
2430 * 0 terminated ASS/SSA compatible event line.
2431 * The pressentation of this is unaffected by the other values in this
2432 * struct.
2433 */
2434 char *ass;
c6ec28b1
MN
2435} AVSubtitleRect;
2436
2437typedef struct AVSubtitle {
2438 uint16_t format; /* 0 = graphics */
2439 uint32_t start_display_time; /* relative to packet pts, in ms */
2440 uint32_t end_display_time; /* relative to packet pts, in ms */
ebc466bb 2441 unsigned num_rects;
db4fac64 2442 AVSubtitleRect **rects;
240c1657
FB
2443} AVSubtitle;
2444
240c1657 2445
de6d9b64
FB
2446/* resample.c */
2447
2448struct ReSampleContext;
aaaf1635 2449struct AVResampleContext;
de6d9b64
FB
2450
2451typedef struct ReSampleContext ReSampleContext;
2452
d1e3c6fd
BC
2453#if LIBAVCODEC_VERSION_MAJOR < 53
2454/**
2455 * @deprecated Use av_audio_resample_init() instead.
2456 */
2457attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2458 int output_rate, int input_rate);
2459#endif
2460/**
2461 * Initializes audio resampling context
2462 *
2463 * @param output_channels number of output channels
2464 * @param input_channels number of input channels
2465 * @param output_rate output sample rate
2466 * @param input_rate input sample rate
2467 * @param sample_fmt_out requested output sample format
2468 * @param sample_fmt_in input sample format
2469 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2470 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2471 * @param linear If 1 then the used FIR filter will be linearly interpolated
2472 between the 2 closest, if 0 the closest will be used
2473 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
2474 * @return allocated ReSampleContext, NULL if error occured
2475 */
2476ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
2477 int output_rate, int input_rate,
2478 enum SampleFormat sample_fmt_out,
2479 enum SampleFormat sample_fmt_in,
2480 int filter_length, int log2_phase_count,
2481 int linear, double cutoff);
2482
de6d9b64
FB
2483int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2484void audio_resample_close(ReSampleContext *s);
2485
3136fcf4
MN
2486
2487/**
2488 * Initializes an audio resampler.
2489 * Note, if either rate is not an integer then simply scale both rates up so they are.
990058bd
MN
2490 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2491 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2492 * @param linear If 1 then the used FIR filter will be linearly interpolated
2493 between the 2 closest, if 0 the closest will be used
2494 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3136fcf4 2495 */
6e225de2 2496struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3136fcf4
MN
2497
2498/**
2499 * resamples.
2500 * @param src an array of unconsumed samples
2501 * @param consumed the number of samples of src which have been consumed are returned here
2502 * @param src_size the number of unconsumed samples available
2503 * @param dst_size the amount of space in samples available in dst
2504 * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
2505 * @return the number of samples written in dst or -1 if an error occurred
2506 */
aaaf1635 2507int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3136fcf4
MN
2508
2509
2510/**
2511 * Compensates samplerate/timestamp drift. The compensation is done by changing
2512 * the resampler parameters, so no audible clicks or similar distortions occur
2513 * @param compensation_distance distance in output samples over which the compensation should be performed
2514 * @param sample_delta number of output samples which should be output less
2515 *
2516 * example: av_resample_compensate(c, 10, 500)
2517 * here instead of 510 samples only 500 samples would be output
2518 *
2519 * note, due to rounding the actual compensation might be slightly different,
2520 * especially if the compensation_distance is large and the in_rate used during init is small
2521 */
2d48eddd 2522void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
d88443ae 2523void av_resample_close(struct AVResampleContext *c);
aaaf1635 2524
75917b88
DH
2525/**
2526 * Allocate memory for a picture. Call avpicture_free to free it.
2527 *
f5bccd85
DB
2528 * @param picture the picture to be filled in
2529 * @param pix_fmt the format of the picture
2530 * @param width the width of the picture
2531 * @param height the height of the picture
2532 * @return zero if successful, a negative value if not
75917b88
DH
2533 */
2534int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2535
8fc3d25c
PI
2536/**
2537 * Free a picture previously allocated by avpicture_alloc().
2538 *
f5bccd85 2539 * @param picture the AVPicture to be freed
8fc3d25c 2540 */
75917b88
DH
2541void avpicture_free(AVPicture *picture);
2542
392cf77a 2543/**
f5bccd85 2544 * Fill in the AVPicture fields.
392cf77a
PI
2545 * The fields of the given AVPicture are filled in by using the 'ptr' address
2546 * which points to the image data buffer. Depending on the specified picture
2547 * format, one or multiple image data pointers and line sizes will be set.
2548 * If a planar format is specified, several pointers will be set pointing to
2549 * the different picture planes and the line sizes of the different planes
2550 * will be stored in the lines_sizes array.
2551 *
f5bccd85 2552 * @param picture AVPicture whose fields are to be filled in
392cf77a 2553 * @param ptr Buffer which will contain or contains the actual image data
f5bccd85
DB
2554 * @param pix_fmt The format in which the picture data is stored.
2555 * @param width the width of the image in pixels
2556 * @param height the height of the image in pixels
2557 * @return size of the image data in bytes
392cf77a 2558 */
0c1a9eda 2559int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2d1a4094 2560 int pix_fmt, int width, int height);
da64ecc3 2561int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
63167088 2562 unsigned char *dest, int dest_size);
392cf77a
PI
2563
2564/**
2565 * Calculate the size in bytes that a picture of the given width and height
2566 * would occupy if stored in the given picture format.
2567 *
f5bccd85
DB
2568 * @param pix_fmt the given picture format
2569 * @param width the width of the image
2570 * @param height the height of the image
392cf77a
PI
2571 * @return Image data size in bytes
2572 */
219b06c6 2573int avpicture_get_size(int pix_fmt, int width, int height);
dab64ebc
FB
2574void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2575const char *avcodec_get_pix_fmt_name(int pix_fmt);
21adafec 2576void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
63167088 2577enum PixelFormat avcodec_get_pix_fmt(const char* name);
d07730dd 2578unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
219b06c6 2579
81299d42
PI
2580#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
2581#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
2582#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
2583#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
2584#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
2585#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
fab21997 2586
392cf77a 2587/**
81299d42
PI
2588 * Computes what kind of losses will occur when converting from one specific
2589 * pixel format to another.
2590 * When converting from one pixel format to another, information loss may occur.
2591 * For example, when converting from RGB24 to GRAY, the color information will
2592 * be lost. Similarly, other losses occur when converting from some formats to
2593 * other formats. These losses can involve loss of chroma, but also loss of
2594 * resolution, loss of color depth, loss due to the color space conversion, loss
2595 * of the alpha bits or loss due to color quantization.
f5bccd85
DB
2596 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
2597 * which will occur when converting from one pixel format to another.
81299d42 2598 *
f5bccd85
DB
2599 * @param[in] dst_pix_fmt destination pixel format
2600 * @param[in] src_pix_fmt source pixel format
81299d42
PI
2601 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2602 * @return Combination of flags informing you what kind of losses will occur.
392cf77a 2603 */
fab21997
FB
2604int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2605 int has_alpha);
392cf77a
PI
2606
2607/**
81299d42
PI
2608 * Finds the best pixel format to convert to given a certain source pixel
2609 * format. When converting from one pixel format to another, information loss
2610 * may occur. For example, when converting from RGB24 to GRAY, the color
2611 * information will be lost. Similarly, other losses occur when converting from
2612 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
f5bccd85
DB
2613 * the given pixel formats should be used to suffer the least amount of loss.
2614 * The pixel formats from which it chooses one, are determined by the
81299d42
PI
2615 * \p pix_fmt_mask parameter.
2616 *
2617 * @code
2618 * src_pix_fmt = PIX_FMT_YUV420P;
2619 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2620 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2621 * @endcode
2622 *
f5bccd85
DB
2623 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
2624 * @param[in] src_pix_fmt source pixel format
81299d42
PI
2625 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2626 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2627 * @return The best pixel format to convert to or -1 if none was found.
392cf77a 2628 */
9d214947 2629int avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, int src_pix_fmt,
fab21997
FB
2630 int has_alpha, int *loss_ptr);
2631
c3b95b1d
SS
2632
2633/**
2634 * Print in buf the string corresponding to the pixel format with
2635 * number pix_fmt, or an header if pix_fmt is negative.
2636 *
9bd51b9a
PI
2637 * @param[in] buf the buffer where to write the string
2638 * @param[in] buf_size the size of buf
2639 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
c3b95b1d
SS
2640 * a negative value to print the corresponding header.
2641 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
2642 */
2643void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt);
2644
0469baf1
FB
2645#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2646#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
392cf77a
PI
2647
2648/**
2649 * Tell if an image really has transparent alpha values.
2650 * @return ored mask of FF_ALPHA_xxx constants
2651 */
da64ecc3 2652int img_get_alpha_info(const AVPicture *src,
bb270c08 2653 int pix_fmt, int width, int height);
0469baf1 2654
219b06c6 2655/* deinterlace a picture */
392cf77a 2656/* deinterlace - if not supported return -1 */
da64ecc3 2657int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
de6d9b64
FB
2658 int pix_fmt, int width, int height);
2659
2660/* external high level API */
2661
0334f799
SS
2662/**
2663 * If c is NULL, returns the first registered codec,
c1b02101 2664 * if c is non-NULL, returns the next registered codec after c,
0334f799
SS
2665 * or NULL if c is the last one.
2666 */
55b9e69a 2667AVCodec *av_codec_next(AVCodec *c);
de6d9b64 2668
96afa6be
SS
2669/**
2670 * Returns the LIBAVCODEC_VERSION_INT constant.
2671 */
51a49663 2672unsigned avcodec_version(void);
96afa6be 2673
f9ec0aa1
PI
2674/**
2675 * Initializes libavcodec.
2676 *
2677 * @warning This function \e must be called before any other libavcodec
2678 * function.
2679 */
de6d9b64
FB
2680void avcodec_init(void);
2681
9d385cfe 2682#if LIBAVCODEC_VERSION_MAJOR < 53
d1ca187f 2683/**
85662f49
SS
2684 * @deprecated Deprecated in favor of avcodec_register().
2685 */
2686attribute_deprecated void register_avcodec(AVCodec *codec);
9d385cfe 2687#endif
85662f49
SS
2688
2689/**
d1ca187f
SS
2690 * Register the codec \p codec and initialize libavcodec.
2691 *
2692 * @see avcodec_init()
2693 */
85662f49 2694void avcodec_register(AVCodec *codec);
f9ec0aa1
PI
2695
2696/**
645f7879 2697 * Finds a registered encoder with a matching codec ID.
f9ec0aa1 2698 *
f5bccd85 2699 * @param id CodecID of the requested encoder
f9ec0aa1
PI
2700 * @return An encoder if one was found, NULL otherwise.
2701 */
de6d9b64 2702AVCodec *avcodec_find_encoder(enum CodecID id);
f9ec0aa1
PI
2703
2704/**
645f7879 2705 * Finds a registered encoder with the specified name.
f9ec0aa1 2706 *
f5bccd85 2707 * @param name name of the requested encoder
f9ec0aa1
PI
2708 * @return An encoder if one was found, NULL otherwise.
2709 */
98f3b098 2710AVCodec *avcodec_find_encoder_by_name(const char *name);
f9ec0aa1
PI
2711
2712/**
645f7879 2713 * Finds a registered decoder with a matching codec ID.
f9ec0aa1 2714 *
f5bccd85 2715 * @param id CodecID of the requested decoder
f9ec0aa1
PI
2716 * @return A decoder if one was found, NULL otherwise.
2717 */
de6d9b64 2718AVCodec *avcodec_find_decoder(enum CodecID id);
f9ec0aa1
PI
2719
2720/**
645f7879 2721 * Finds a registered decoder with the specified name.
f9ec0aa1 2722 *
f5bccd85 2723 * @param name name of the requested decoder
f9ec0aa1
PI
2724 * @return A decoder if one was found, NULL otherwise.
2725 */
de6d9b64
FB
2726AVCodec *avcodec_find_decoder_by_name(const char *name);
2727void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2728
f9ec0aa1
PI
2729/**
2730 * Sets the fields of the given AVCodecContext to default values.
2731 *
2732 * @param s The AVCodecContext of which the fields should be set to default values.
2733 */
1e491e29 2734void avcodec_get_context_defaults(AVCodecContext *s);
f9ec0aa1 2735
29301573
MN
2736/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2737 * we WILL change its arguments and name a few times! */
2738void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2739
f9ec0aa1
PI
2740/**
2741 * Allocates an AVCodecContext and sets its fields to default values. The
2742 * resulting struct can be deallocated by simply calling av_free().
2743 *
2744 * @return An AVCodecContext filled with default values or NULL on failure.
2745 * @see avcodec_get_context_defaults
2746 */
7ffbb60e 2747AVCodecContext *avcodec_alloc_context(void);
f9ec0aa1 2748
29301573
MN
2749/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2750 * we WILL change its arguments and name a few times! */
2751AVCodecContext *avcodec_alloc_context2(enum CodecType);
2752
f9ec0aa1
PI
2753/**
2754 * Sets the fields of the given AVFrame to default values.
2755 *
2756 * @param pic The AVFrame of which the fields should be set to default values.
2757 */
7906085f 2758void avcodec_get_frame_defaults(AVFrame *pic);
f9ec0aa1
PI
2759
2760/**
2761 * Allocates an AVFrame and sets its fields to default values. The resulting
2762 * struct can be deallocated by simply calling av_free().
2763 *
2764 * @return An AVFrame filled with default values or NULL on failure.
2765 * @see avcodec_get_frame_defaults
2766 */
492cd3a9 2767AVFrame *avcodec_alloc_frame(void);
1e491e29 2768
492cd3a9
MN
2769int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2770void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3a569751
MN
2771int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2772void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
f9ec0aa1
PI
2773
2774/**
2775 * Checks if the given dimension of a picture is valid, meaning that all
2776 * bytes of the picture can be addressed with a signed int.
2777 *
2778 * @param[in] w Width of the picture.
2779 * @param[in] h Height of the picture.
2780 * @return Zero if valid, a negative value if invalid.
2781 */
0ecca7a4 2782int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3a569751 2783enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
1e491e29 2784
5a815088
MN
2785int avcodec_thread_init(AVCodecContext *s, int thread_count);
2786void avcodec_thread_free(AVCodecContext *s);
3a84713a
RS
2787int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
2788int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
9c3d33d6
MN
2789//FIXME func typedef
2790
7a06ff14 2791/**
f9ec0aa1
PI
2792 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2793 * function the context has to be allocated.
2794 *
2795 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2796 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2797 * retrieving a codec.
2798 *
f5bccd85 2799 * @warning This function is not thread safe!
f9ec0aa1
PI
2800 *
2801 * @code
c9823f05 2802 * avcodec_register_all();
f9ec0aa1
PI
2803 * codec = avcodec_find_decoder(CODEC_ID_H264);
2804 * if (!codec)
2805 * exit(1);
2806 *
2807 * context = avcodec_alloc_context();
2808 *
2809 * if (avcodec_open(context, codec) < 0)
2810 * exit(1);
2811 * @endcode
2812 *
f5bccd85 2813 * @param avctx The context which will be set up to use the given codec.
f9ec0aa1 2814 * @param codec The codec to use within the context.
f5bccd85 2815 * @return zero on success, a negative value on error
f9ec0aa1 2816 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
7a06ff14 2817 */
de6d9b64 2818int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
7a06ff14 2819
f9ec0aa1 2820/**
f9ec0aa1 2821 * Decodes an audio frame from \p buf into \p samples.
f5bccd85 2822 * The avcodec_decode_audio2() function decodes an audio frame from the input
f9ec0aa1 2823 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
f5bccd85 2824 * audio codec which was coupled with \p avctx using avcodec_open(). The
f9ec0aa1
PI
2825 * resulting decoded frame is stored in output buffer \p samples. If no frame
2826 * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2827 * decompressed frame size in \e bytes.
2828 *
2829 * @warning You \e must set \p frame_size_ptr to the allocated size of the
2830 * output buffer before calling avcodec_decode_audio2().
2831 *
2832 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2833 * the actual read bytes because some optimized bitstream readers read 32 or 64
2834 * bits at once and could read over the end.
2835 *
2836 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2837 * no overreading happens for damaged MPEG streams.
98145875 2838 *
f9ec0aa1 2839 * @note You might have to align the input buffer \p buf and output buffer \p
f5bccd85 2840 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
f9ec0aa1
PI
2841 * necessary at all, on others it won't work at all if not aligned and on others
2842 * it will work but it will have an impact on performance. In practice, the
2843 * bitstream should have 4 byte alignment at minimum and all sample data should
2844 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2845 * the linesize is not a multiple of 16 then there's no sense in aligning the
2846 * start of the buffer to 16.
2847 *
f5bccd85
DB
2848 * @param avctx the codec context
2849 * @param[out] samples the output buffer
2850 * @param[in,out] frame_size_ptr the output buffer size in bytes
2851 * @param[in] buf the input buffer
2852 * @param[in] buf_size the input buffer size in bytes
f9ec0aa1
PI
2853 * @return On error a negative value is returned, otherwise the number of bytes
2854 * used or zero if no frame could be decompressed.
98145875 2855 */
ac66834c 2856int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
de6d9b64 2857 int *frame_size_ptr,
2efa7fd1 2858 const uint8_t *buf, int buf_size);
f9ec0aa1
PI
2859
2860/**
2861 * Decodes a video frame from \p buf into \p picture.
f5bccd85 2862 * The avcodec_decode_video() function decodes a video frame from the input
f9ec0aa1 2863 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
f5bccd85 2864 * video codec which was coupled with \p avctx using avcodec_open(). The
f9ec0aa1
PI
2865 * resulting decoded frame is stored in \p picture.
2866 *
2867 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2868 * the actual read bytes because some optimized bitstream readers read 32 or 64
2869 * bits at once and could read over the end.
2870 *
2871 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2872 * no overreading happens for damaged MPEG streams.
2873 *
2874 * @note You might have to align the input buffer \p buf and output buffer \p
2875 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2876 * necessary at all, on others it won't work at all if not aligned and on others
2877 * it will work but it will have an impact on performance. In practice, the
2878 * bitstream should have 4 byte alignment at minimum and all sample data should
2879 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2880 * the linesize is not a multiple of 16 then there's no sense in aligning the
2881 * start of the buffer to 16.
2882 *
1b9bbf86
MN
2883 * @note Some codecs have a delay between input and output, these need to be
2884 * feeded with buf=NULL, buf_size=0 at the end to return the remaining frames.
2885 *
f5bccd85 2886 * @param avctx the codec context
f9ec0aa1 2887 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
f5bccd85
DB
2888 * @param[in] buf the input buffer
2889 * @param[in] buf_size the size of the input buffer in bytes
2890 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
f9ec0aa1
PI
2891 * @return On error a negative value is returned, otherwise the number of bytes
2892 * used or zero if no frame could be decompressed.
2893 */
115329f1 2894int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
de6d9b64 2895 int *got_picture_ptr,
2efa7fd1 2896 const uint8_t *buf, int buf_size);
8ab4861c 2897
f5bccd85
DB
2898/* Decode a subtitle message. Return -1 if error, otherwise return the
2899 * number of bytes used. If no subtitle could be decompressed,
2900 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
240c1657
FB
2901int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2902 int *got_sub_ptr,
2903 const uint8_t *buf, int buf_size);
115329f1 2904int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
917e06c8 2905 int *data_size_ptr,
0c1a9eda 2906 uint8_t *buf, int buf_size);
f9ec0aa1
PI
2907
2908/**
2909 * Encodes an audio frame from \p samples into \p buf.
f5bccd85
DB
2910 * The avcodec_encode_audio() function encodes an audio frame from the input
2911 * buffer \p samples. To encode it, it makes use of the audio codec which was
f9ec0aa1
PI
2912 * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2913 * stored in output buffer \p buf.
2914 *
2915 * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2916 *
f5bccd85
DB
2917 * @param avctx the codec context
2918 * @param[out] buf the output buffer
2919 * @param[in] buf_size the output buffer size
2920 * @param[in] samples the input buffer containing the samples
0fe93f07
SS
2921 * The number of samples read from this buffer is frame_size*channels,
2922 * both of which are defined in \p avctx.
5231f101
SS
2923 * For PCM audio the number of samples read from \p samples is equal to
2924 * \p buf_size * input_sample_size / output_sample_size.
7338d368 2925 * @return On error a negative value is returned, on success zero or the number
0fe93f07 2926 * of bytes used to encode the data read from the input buffer.
f9ec0aa1 2927 */
115329f1 2928int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
de6d9b64 2929 const short *samples);
f9ec0aa1
PI
2930
2931/**
2932 * Encodes a video frame from \p pict into \p buf.
f5bccd85
DB
2933 * The avcodec_encode_video() function encodes a video frame from the input
2934 * \p pict. To encode it, it makes use of the video codec which was coupled with
f9ec0aa1
PI
2935 * \p avctx using avcodec_open(). The resulting encoded bytes representing the
2936 * frame are stored in the output buffer \p buf. The input picture should be
2937 * stored using a specific format, namely \c avctx.pix_fmt.
2938 *
f5bccd85
DB
2939 * @param avctx the codec context
2940 * @param[out] buf the output buffer for the bitstream of encoded frame
2941 * @param[in] buf_size the size of the output buffer in bytes
2942 * @param[in] pict the input picture to encode
f9ec0aa1 2943 * @return On error a negative value is returned, on success zero or the number
99b38122 2944 * of bytes used from the output buffer.
f9ec0aa1 2945 */
115329f1 2946int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
492cd3a9 2947 const AVFrame *pict);
115329f1 2948int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
240c1657 2949 const AVSubtitle *sub);
de6d9b64
FB
2950
2951int avcodec_close(AVCodecContext *avctx);
2952
d0a01fe8
SS
2953/**
2954 * Register all the codecs, parsers and bitstream filters which were enabled at
2955 * configuration time. If you do not call this function you can select exactly
2956 * which formats you want to support, by using the individual registration
2957 * functions.
2958 *
9be26823 2959 * @see avcodec_register
d0a01fe8
SS
2960 * @see av_register_codec_parser
2961 * @see av_register_bitstream_filter
2962 */
de6d9b64 2963void avcodec_register_all(void);
a96b68b7 2964
8ab4861c
PI
2965/**
2966 * Flush buffers, should be called when seeking or when switching to a different stream.
2967 */
1c2a8c7f
MN
2968void avcodec_flush_buffers(AVCodecContext *avctx);
2969
88730be6
MR
2970void avcodec_default_free_buffers(AVCodecContext *s);
2971
85975aa9 2972/* misc useful functions */
d8085ea7
MN
2973
2974/**
8f6260af
PI
2975 * Returns a single letter to describe the given picture type \p pict_type.
2976 *
f5bccd85 2977 * @param[in] pict_type the picture type
8f6260af 2978 * @return A single character representing the picture type.
d8085ea7
MN
2979 */
2980char av_get_pict_type_char(int pict_type);
2981
ac3e1834 2982/**
2fa378a7
PI
2983 * Returns codec bits per sample.
2984 *
f5bccd85 2985 * @param[in] codec_id the codec
2fa378a7 2986 * @return Number of bits per sample or zero if unknown for the given codec.
ac3e1834
BC
2987 */
2988int av_get_bits_per_sample(enum CodecID codec_id);
2e8f2c20 2989
42c71907
DC
2990/**
2991 * Returns sample format bits per sample.
2992 *
2993 * @param[in] sample_fmt the sample format
2994 * @return Number of bits per sample or zero if unknown for the given sample format.
2995 */
2996int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
2997
8424cf50
FB
2998/* frame parsing */
2999typedef struct AVCodecParserContext {
3000 void *priv_data;
3001 struct AVCodecParser *parser;
3002 int64_t frame_offset; /* offset of the current frame */
115329f1 3003 int64_t cur_offset; /* current offset
8424cf50 3004 (incremented by each av_parser_parse()) */
26f23725 3005 int64_t next_frame_offset; /* offset of the next frame */
8424cf50 3006 /* video info */
f5bccd85 3007 int pict_type; /* XXX: Put it back in AVCodecContext. */
346db3ef
IS
3008 /**
3009 * This field is used for proper frame duration computation in lavf.
3010 * It signals, how much longer the frame duration of the current frame
3011 * is compared to normal frame duration.
3012 *
3013 * frame_duration = (2 + repeat_pict) / (2*fps)
3014 *
3015 * It is used by codecs like H.264 to display telecined material.
3016 *
3017 * @note This field can also be set to -1 for half-frame duration in case
3018 * of field pictures.
3019 */
f5bccd85 3020 int repeat_pict; /* XXX: Put it back in AVCodecContext. */
b84f2a35
FB
3021 int64_t pts; /* pts of the current frame */
3022 int64_t dts; /* dts of the current frame */
3023
3024 /* private data */
3025 int64_t last_pts;
3026 int64_t last_dts;
a62aecce 3027 int fetch_timestamp;
b84f2a35
FB
3028
3029#define AV_PARSER_PTS_NB 4
3030 int cur_frame_start_index;
3031 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3032 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3033 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
115329f1 3034
7cbaa7ba
MN
3035 int flags;
3036#define PARSER_FLAG_COMPLETE_FRAMES 0x0001
a74008a4
JP
3037
3038 int64_t offset; ///< byte offset from starting packet start
5c027f88 3039 int64_t cur_frame_end[AV_PARSER_PTS_NB];
6363af44
IS
3040
3041 /*!
3042 * Set by parser to 1 for key frames and 0 for non-key frames.
3043 * It is initialized to -1, so if the parser doesn't set this flag,
3044 * old-style fallback using FF_I_TYPE picture type as key frames
3045 * will be used.
3046 */
3047 int key_frame;
b1fa4942
IS
3048
3049 /**
3050 * Time difference in stream time base units from the pts of this
3051 * packet to the point at which the output from the decoder has converged
3052 * independent from the availability of previous frames. That is, the
3053 * frames are virtually identical no matter if decoding started from
3054 * the very first frame or from this keyframe.
3055 * Is AV_NOPTS_VALUE if unknown.
3056 * This field is not the display duration of the current frame.
3057 *
3058 * The purpose of this field is to allow seeking in streams that have no
3059 * keyframes in the conventional sense. It corresponds to the
3060 * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3061 * essential for some types of subtitle streams to ensure that all
3062 * subtitles are correctly displayed after seeking.
3063 */
3064 int64_t convergence_duration;
8424cf50
FB
3065} AVCodecParserContext;
3066
3067typedef struct AVCodecParser {
99f06236 3068 int codec_ids[5]; /* several codec IDs are permitted */
8424cf50
FB
3069 int priv_data_size;
3070 int (*parser_init)(AVCodecParserContext *s);
115329f1 3071 int (*parser_parse)(AVCodecParserContext *s,
8424cf50 3072 AVCodecContext *avctx,
c53d2d90 3073 const uint8_t **poutbuf, int *poutbuf_size,
8424cf50
FB
3074 const uint8_t *buf, int buf_size);
3075 void (*parser_close)(AVCodecParserContext *s);
90ad92b3 3076 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
8424cf50
FB
3077 struct AVCodecParser *next;
3078} AVCodecParser;
3079
55b9e69a 3080AVCodecParser *av_parser_next(AVCodecParser *c);
8424cf50
FB
3081
3082void av_register_codec_parser(AVCodecParser *parser);
3083AVCodecParserContext *av_parser_init(int codec_id);
115329f1 3084int av_parser_parse(AVCodecParserContext *s,
8424cf50 3085 AVCodecContext *avctx,