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[libav.git] / libavcodec / avcodec.h
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1#ifndef AVCODEC_H
2#define AVCODEC_H
3
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4/**
5 * @file avcodec.h
d33c949c 6 * external api header.
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7 */
8
9
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10#ifdef __cplusplus
11extern "C" {
12#endif
13
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14#include "common.h"
15
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16#define LIBAVCODEC_VERSION_INT 0x000406
17#define LIBAVCODEC_VERSION "0.4.6"
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18#define LIBAVCODEC_BUILD 4662
19#define LIBAVCODEC_BUILD_STR "4662"
4b1f4f23 20
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21#define LIBAVCODEC_IDENT "FFmpeg" LIBAVCODEC_VERSION "b" LIBAVCODEC_BUILD_STR
22
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23enum CodecID {
24 CODEC_ID_NONE,
25 CODEC_ID_MPEG1VIDEO,
26 CODEC_ID_H263,
27 CODEC_ID_RV10,
28 CODEC_ID_MP2,
9d36bdc9 29 CODEC_ID_MP3LAME,
81e0d0b4 30 CODEC_ID_VORBIS,
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31 CODEC_ID_AC3,
32 CODEC_ID_MJPEG,
b135d9fb 33 CODEC_ID_MJPEGB,
bf89e6b1 34 CODEC_ID_MPEG4,
de6d9b64 35 CODEC_ID_RAWVIDEO,
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36 CODEC_ID_MSMPEG4V1,
37 CODEC_ID_MSMPEG4V2,
38 CODEC_ID_MSMPEG4V3,
e1a9dbff 39 CODEC_ID_WMV1,
b50eef3a 40 CODEC_ID_WMV2,
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41 CODEC_ID_H263P,
42 CODEC_ID_H263I,
be8ffec9 43 CODEC_ID_SVQ1,
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44 CODEC_ID_DVVIDEO,
45 CODEC_ID_DVAUDIO,
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46 CODEC_ID_WMAV1,
47 CODEC_ID_WMAV2,
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48 CODEC_ID_MACE3,
49 CODEC_ID_MACE6,
11f18faf 50 CODEC_ID_HUFFYUV,
f70f7c6d 51 CODEC_ID_CYUV,
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52
53 /* various pcm "codecs" */
54 CODEC_ID_PCM_S16LE,
55 CODEC_ID_PCM_S16BE,
56 CODEC_ID_PCM_U16LE,
57 CODEC_ID_PCM_U16BE,
58 CODEC_ID_PCM_S8,
59 CODEC_ID_PCM_U8,
60 CODEC_ID_PCM_MULAW,
61 CODEC_ID_PCM_ALAW,
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62
63 /* various adpcm codecs */
64 CODEC_ID_ADPCM_IMA_QT,
65 CODEC_ID_ADPCM_IMA_WAV,
66 CODEC_ID_ADPCM_MS,
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67};
68
69enum CodecType {
4a663d80 70 CODEC_TYPE_UNKNOWN = -1,
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71 CODEC_TYPE_VIDEO,
72 CODEC_TYPE_AUDIO,
73};
74
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75/**
76 * Pixel format.
77 */
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78enum PixelFormat {
79 PIX_FMT_YUV420P,
80 PIX_FMT_YUV422,
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81 PIX_FMT_RGB24, ///< 3 bytes, R is first
82 PIX_FMT_BGR24, ///< 3 bytes, B is first
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83 PIX_FMT_YUV422P,
84 PIX_FMT_YUV444P,
64863965 85 PIX_FMT_RGBA32, ///< always stored in cpu endianness
e9feea59 86 PIX_FMT_YUV410P,
a32072d0 87 PIX_FMT_YUV411P,
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88 PIX_FMT_RGB565, ///< always stored in cpu endianness
89 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
dab64ebc 90 PIX_FMT_GRAY8,
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91 PIX_FMT_MONOWHITE, ///< 0 is white
92 PIX_FMT_MONOBLACK, ///< 0 is black
93 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
dab64ebc 94 PIX_FMT_NB,
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95};
96
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97/* currently unused, may be used if 24/32 bits samples ever supported */
98enum SampleFormat {
64863965 99 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
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100};
101
de6d9b64 102/* in bytes */
bc8d1857 103#define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
de6d9b64 104
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105/**
106 * Required number of zero bytes at the end of the input bitstream for decoding.
107 * to avoid overreading (and possibly segfaulting)
108 */
109#define FF_INPUT_BUFFER_PADDING_SIZE 8
110
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111/* motion estimation type, EPZS by default */
112enum Motion_Est_ID {
101bea5f 113 ME_ZERO = 1,
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114 ME_FULL,
115 ME_LOG,
116 ME_PHODS,
117 ME_EPZS,
118 ME_X1
119};
120
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121typedef struct RcOverride{
122 int start_frame;
123 int end_frame;
124 int qscale; // if this is 0 then quality_factor will be used instead
125 float quality_factor;
126} RcOverride;
127
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128/* only for ME compatiblity with old apps */
129extern int motion_estimation_method;
130
e4986da9 131/* ME algos sorted by quality */
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132static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
133 ME_X1, ME_EPZS, ME_FULL };
de6d9b64 134
28db7fce 135
4e00e76b 136#define FF_MAX_B_FRAMES 8
9dbcbd92 137
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138/* encoding support
139 these flags can be passed in AVCodecContext.flags before initing
140 Note: note not everything is supported yet
141*/
de6d9b64 142
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143#define CODEC_FLAG_HQ 0x0001 ///< brute force MB-type decission mode (slow)
144#define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
145#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed
146#define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
147#define CODEC_FLAG_GMC 0x0020 ///< use GMC
148#define CODEC_FLAG_PART 0x0080 ///< use data partitioning
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149/* parent program gurantees that the input for b-frame containing streams is not written to
150 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
8b4c7dbc 151#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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152#define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
153#define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
154#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
155#define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
156#define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
157#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
158#define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
d7425f59 159 of only at frame boundaries */
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160#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
161#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
162#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay / will fail on b frames
163#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
164#define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
165#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
166#define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
21e59552 167/* Fx : Flag for h263+ extra options */
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168#define CODEC_FLAG_H263P_AIC 0x01000000 ///< Advanced intra coding
169#define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
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170/* For advanced prediction mode, we reuse the 4MV flag */
171/* Unsupported options :
172 * Syntax Arithmetic coding (SAC)
173 * Deblocking filter internal loop
174 * Slice structured
175 * Reference Picture Selection
176 * Independant Segment Decoding
177 * Alternative Inter * VLC
178 * Modified Quantization */
179/* /Fx */
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180/* codec capabilities */
181
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182#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
183#define CODEC_CAP_DR1 0x0002 ///< direct rendering method 1
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184/* if 'parse_only' field is true, then avcodec_parse_frame() can be
185 used */
186#define CODEC_CAP_PARSE_ONLY 0x0004
d7425f59 187#define CODEC_CAP_TRUNCATED 0x0008
bf89e6b1 188
492cd3a9 189#define FF_COMMON_FRAME \
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190 /**\
191 * pointer to the picture planes.\
192 * this might be different from the first allocated byte\
193 * - encoding: \
194 * - decoding: \
195 */\
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196 uint8_t *data[4];\
197 int linesize[4];\
198 /**\
32db2b1d 199 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
1e491e29 200 * this isnt used by lavc unless the default get/release_buffer() is used\
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201 * - encoding: \
202 * - decoding: \
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203 */\
204 uint8_t *base[4];\
205 /**\
206 * 1 -> keyframe, 0-> not\
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207 * - encoding: set by lavc\
208 * - decoding: set by lavc\
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209 */\
210 int key_frame;\
211\
212 /**\
213 * picture type of the frame, see ?_TYPE below\
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214 * - encoding: set by lavc for coded_picture (and set by user for input)\
215 * - decoding: set by lavc\
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216 */\
217 int pict_type;\
218\
219 /**\
220 * presentation timestamp in micro seconds (time when frame should be shown to user)\
221 * if 0 then the frame_rate will be used as reference\
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222 * - encoding: MUST be set by user\
223 * - decoding: set by lavc\
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224 */\
225 long long int pts;\
226\
227 /**\
228 * picture number in bitstream order.\
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229 * - encoding: set by\
230 * - decoding: set by lavc\
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231 */\
232 int coded_picture_number;\
233 /**\
1e491e29 234 * picture number in display order.\
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235 * - encoding: set by\
236 * - decoding: set by lavc\
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237 */\
238 int display_picture_number;\
239\
240 /**\
241 * quality (between 1 (good) and 31 (bad)) \
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242 * - encoding: set by lavc for coded_picture (and set by user for input)\
243 * - decoding: set by lavc\
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244 */\
245 float quality; \
246\
247 /**\
248 * buffer age (1->was last buffer and dint change, 2->..., ...).\
249 * set to something large if the buffer has not been used yet \
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250 * - encoding: unused\
251 * - decoding: MUST be set by get_buffer()\
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252 */\
253 int age;\
254\
255 /**\
256 * is this picture used as reference\
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257 * - encoding: unused\
258 * - decoding: set by lavc (before get_buffer() call))\
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259 */\
260 int reference;\
261\
262 /**\
263 * QP table\
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264 * - encoding: unused\
265 * - decoding: set by lavc\
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266 */\
267 int8_t *qscale_table;\
268 /**\
269 * QP store stride\
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270 * - encoding: unused\
271 * - decoding: set by lavc\
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272 */\
273 int qstride;\
274\
275 /**\
276 * mbskip_table[mb]>=1 if MB didnt change\
277 * stride= mb_width = (width+15)>>4\
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278 * - encoding: unused\
279 * - decoding: set by lavc\
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280 */\
281 uint8_t *mbskip_table;\
282\
283 /**\
284 * for some private data of the user\
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285 * - encoding: unused\
286 * - decoding: set by user\
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287 */\
288 void *opaque;\
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289\
290 /**\
291 * error\
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292 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
293 * - decoding: unused\
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294 */\
295 uint64_t error[4];\
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296\
297 /**\
298 * type of the buffer (to keep track of who has to dealloc data[*])\
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299 * - encoding: set by the one who allocs it\
300 * - decoding: set by the one who allocs it\
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301 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
302 */\
303 int type;\
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304 \
305 /**\
306 * when decoding, this signal how much the picture must be delayed.\
307 * extra_delay = repeat_pict / (2*fps)\
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308 * - encoding: unused\
309 * - decoding: set by lavc\
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310 */\
311 int repeat_pict;
312
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313
314#define FF_BUFFER_TYPE_INTERNAL 1
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315#define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers
316#define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc
4e00e76b 317
1e491e29 318
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319#define FF_I_TYPE 1 // Intra
320#define FF_P_TYPE 2 // Predicted
321#define FF_B_TYPE 3 // Bi-dir predicted
322#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
1e491e29 323
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324typedef struct AVFrame {
325 FF_COMMON_FRAME
326} AVFrame;
1e491e29 327
14bea432 328#define DEFAULT_FRAME_RATE_BASE 1001000
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329
330/**
331 * main external api structure.
332 */
de6d9b64 333typedef struct AVCodecContext {
b71901e6 334 /**
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335 * the average bitrate.
336 * - encoding: set by user. unused for constant quantizer encoding
337 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
b71901e6 338 */
de6d9b64 339 int bit_rate;
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340
341 /**
64863965 342 * number of bits the bitstream is allowed to diverge from the reference.
b71901e6 343 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
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344 * - encoding: set by user. unused for constant quantizer encoding
345 * - decoding: unused
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346 */
347 int bit_rate_tolerance;
348
349 /**
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350 * CODEC_FLAG_*.
351 * - encoding: set by user.
352 * - decoding: set by user.
b71901e6 353 */
de6d9b64 354 int flags;
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355
356 /**
357 * some codecs needs additionnal format info. It is stored here
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358 * - encoding: set by user.
359 * - decoding: set by lavc. (FIXME is this ok?)
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360 */
361 int sub_id;
362
363 /**
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364 * motion estimation algorithm used for video coding.
365 * - encoding: MUST be set by user.
366 * - decoding: unused
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367 */
368 int me_method;
369
370 /**
64863965 371 * some codecs need / can use extra-data like huffman tables.
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372 * mjpeg: huffman tables
373 * rv10: additional flags
b704e742 374 * mpeg4: global headers (they can be in the bitstream or here)
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375 * - encoding: set/allocated/freed by lavc.
376 * - decoding: set/allocated/freed by user.
b71901e6 377 */
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378 void *extradata;
379 int extradata_size;
380
de6d9b64 381 /* video only */
b71901e6 382 /**
14bea432 383 * frames per sec multiplied by frame_rate_base.
b71901e6 384 * for variable fps this is the precission, so if the timestamps
14bea432 385 * can be specified in msec precssion then this is 1000*frame_rate_base
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386 * - encoding: MUST be set by user
387 * - decoding: set by lavc. 0 or the frame_rate if available
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388 */
389 int frame_rate;
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390
391 /**
392 * frame_rate_base.
393 * for variable fps this is 1
394 * - encoding: set by user.
395 * - decoding: set by lavc.
396 */
397 int frame_rate_base;
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398
399 /**
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400 * width / height.
401 * - encoding: MUST be set by user.
402 * - decoding: set by user, some codecs might override / change it during playback
b71901e6 403 */
de6d9b64 404 int width, height;
b71901e6 405
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406#define FF_ASPECT_SQUARE 1
407#define FF_ASPECT_4_3_625 2
408#define FF_ASPECT_4_3_525 3
409#define FF_ASPECT_16_9_625 4
410#define FF_ASPECT_16_9_525 5
e769f053 411#define FF_ASPECT_EXTENDED 15
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412
413 /**
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414 * the number of pictures in a group of pitures, or 0 for intra_only.
415 * - encoding: set by user.
416 * - decoding: unused
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417 */
418 int gop_size;
419
420 /**
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421 * pixel format, see PIX_FMT_xxx.
422 * - encoding: unused
423 * - decoding: set by lavc.
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424 */
425 enum PixelFormat pix_fmt;
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426
427 /**
428 * Frame rate emulation. If not zero lower layer (i.e. format handler)
429 * has to read frames at native frame rate.
430 * - encoding: set by user.
431 * - decoding: unused.
432 */
433 int rate_emu;
434
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435 /**
436 * if non NULL, 'draw_horiz_band' is called by the libavcodec
437 * decoder to draw an horizontal band. It improve cache usage. Not
438 * all codecs can do that. You must check the codec capabilities
439 * before
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440 * - encoding: unused
441 * - decoding: set by user.
b71901e6 442 */
bf89e6b1 443 void (*draw_horiz_band)(struct AVCodecContext *s,
0c1a9eda 444 uint8_t **src_ptr, int linesize,
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445 int y, int width, int height);
446
de6d9b64 447 /* audio only */
64863965 448 int sample_rate; ///< samples per sec
de6d9b64 449 int channels;
64863965 450 int sample_fmt; ///< sample format, currenly unused
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451
452 /* the following data should not be initialized */
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453 int frame_size; ///< in samples, initialized when calling 'init'
454 int frame_number; ///< audio or video frame number
455 int real_pict_num; ///< returns the real picture number of previous encoded frame
1e491e29 456
b71901e6 457 /**
b71901e6 458 * number of frames the decoded output will be delayed relative to
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459 * the encoded input.
460 * - encoding: set by lavc.
461 * - decoding: unused
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462 */
463 int delay;
1ff662cc 464
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465 /* - encoding parameters */
466 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
467 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
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468
469 /**
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470 * minimum quantizer.
471 * - encoding: set by user.
472 * - decoding: unused
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473 */
474 int qmin;
475
476 /**
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477 * maximum quantizer.
478 * - encoding: set by user.
479 * - decoding: unused
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480 */
481 int qmax;
482
483 /**
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484 * maximum quantizer difference etween frames.
485 * - encoding: set by user.
486 * - decoding: unused
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487 */
488 int max_qdiff;
489
490 /**
64863965 491 * maximum number of b frames between non b frames.
b71901e6 492 * note: the output will be delayed by max_b_frames+1 relative to the input
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493 * - encoding: set by user.
494 * - decoding: unused
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495 */
496 int max_b_frames;
497
498 /**
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499 * qscale factor between ip and b frames.
500 * - encoding: set by user.
501 * - decoding: unused
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502 */
503 float b_quant_factor;
504
505 /** obsolete FIXME remove */
506 int rc_strategy;
8b4c7dbc 507 int b_frame_strategy;
9dbcbd92 508
b71901e6 509 /**
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510 * hurry up amount.
511 * - encoding: unused
512 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
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513 */
514 int hurry_up;
2417652e 515
de6d9b64 516 struct AVCodec *codec;
b71901e6 517
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518 void *priv_data;
519
644d98a4 520 /* The following data is for RTP friendly coding */
1f6b6e50 521 /* By now only H.263/H.263+/MPEG4 coder honours this */
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522 int rtp_mode; /* 1 for activate RTP friendly-mode */
523 /* highers numbers represent more error-prone */
524 /* enviroments, by now just "1" exist */
525
526 int rtp_payload_size; /* The size of the RTP payload, the coder will */
527 /* do it's best to deliver a chunk with size */
528 /* below rtp_payload_size, the chunk will start */
529 /* with a start code on some codecs like H.263 */
530 /* This doesn't take account of any particular */
531 /* headers inside the transmited RTP payload */
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532
533
534 /* The RTP callcack: This function is called */
535 /* every time the encoder as a packet to send */
536 /* Depends on the encoder if the data starts */
537 /* with a Start Code (it should) H.263 does */
538 void (*rtp_callback)(void *data, int size, int packet_number);
539
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540 /* statistics, used for 2-pass encoding */
541 int mv_bits;
542 int header_bits;
543 int i_tex_bits;
544 int p_tex_bits;
545 int i_count;
546 int p_count;
547 int skip_count;
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548 int misc_bits;
549
550 /**
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551 * number of bits used for the previously encoded frame.
552 * - encoding: set by lavc
7004ffb3 553 * - decoding: unused
b71901e6 554 */
098eefe1 555 int frame_bits;
7004ffb3 556
b71901e6 557 /**
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558 * private data of the user, can be used to carry app specific stuff.
559 * - encoding: set by user
560 * - decoding: set by user
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561 */
562 void *opaque;
563
de6d9b64 564 char codec_name[32];
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565 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
566 enum CodecID codec_id; /* see CODEC_ID_xxx */
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567
568 /**
569 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
570 * this is used to workaround some encoder bugs
571 * - encoding: unused
572 * - decoding: set by user, will be converted to upper case by lavc during init
573 */
574 unsigned int codec_tag;
92ba5ffb 575
b71901e6 576 /**
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577 * workaround bugs in encoders which sometimes cannot be detected automatically.
578 * - encoding: unused
579 * - decoding: set by user
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580 */
581 int workaround_bugs;
64863965 582#define FF_BUG_AUTODETECT 1 ///< autodetection
4d2858de
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583#define FF_BUG_OLD_MSMPEG4 2
584#define FF_BUG_XVID_ILACE 4
585#define FF_BUG_UMP4 8
586#define FF_BUG_NO_PADDING 16
587#define FF_BUG_AC_VLC 32
03e93d35 588#define FF_BUG_QPEL_CHROMA 64
db794953 589#define FF_BUG_STD_QPEL 128
36df8805 590#define FF_BUG_QPEL_CHROMA2 256
c40c3482 591#define FF_BUG_DIRECT_BLOCKSIZE 512
1c6dcb0f 592#define FF_BUG_EDGE 1024
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593//#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
594
b71901e6 595 /**
64863965
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596 * luma single coeff elimination threshold.
597 * - encoding: set by user
598 * - decoding: unused
b71901e6 599 */
1f6b6e50 600 int luma_elim_threshold;
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601
602 /**
64863965
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603 * chroma single coeff elimination threshold.
604 * - encoding: set by user
605 * - decoding: unused
b71901e6 606 */
1f6b6e50 607 int chroma_elim_threshold;
b71901e6
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608
609 /**
64863965
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610 * strictly follow the std (MPEG4, ...).
611 * - encoding: set by user
612 * - decoding: unused
b71901e6
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613 */
614 int strict_std_compliance;
615
616 /**
64863965 617 * qscale offset between ip and b frames.
b3a391e8
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618 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
619 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
64863965
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620 * - encoding: set by user.
621 * - decoding: unused
b71901e6
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622 */
623 float b_quant_offset;
624
625 /**
ce3bcaed 626 * error resilience higher values will detect more errors but may missdetect
64863965
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627 * some more or less valid parts as errors.
628 * - encoding: unused
629 * - decoding: set by user
b71901e6 630 */
1f6b6e50 631 int error_resilience;
ce3bcaed
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632#define FF_ER_CAREFULL 1
633#define FF_ER_COMPLIANT 2
634#define FF_ER_AGGRESSIVE 3
635#define FF_ER_VERY_AGGRESSIVE 4
ae72cda6 636
6b72ac63 637 /**
1e491e29
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638 * called at the beginning of each frame to get a buffer for it.
639 * if pic.reference is set then the frame will be read later by lavc
64863965
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640 * - encoding: unused
641 * - decoding: set by lavc, user can override
b71901e6 642 */
492cd3a9 643 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
b71901e6
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644
645 /**
1e491e29
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646 * called to release buffers which where allocated with get_buffer.
647 * a released buffer can be reused in get_buffer()
648 * pic.data[*] must be set to NULL
64863965
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649 * - encoding: unused
650 * - decoding: set by lavc, user can override
b71901e6 651 */
492cd3a9 652 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
0fd90455 653
b71901e6 654 /**
64863965
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655 * is 1 if the decoded stream contains b frames, 0 otherwise.
656 * - encoding: unused
657 * - decoding: set by lavc
b71901e6
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658 */
659 int has_b_frames;
b71901e6 660
64863965 661 int block_align; ///< used by some WAV based audio codecs
ce980a95 662
64863965 663 int parse_only; /* - decoding only: if true, only parsing is done
917e06c8
FB
664 (function avcodec_parse_frame()). The frame
665 data is returned. Only MPEG codecs support this now. */
ce980a95 666
b71901e6 667 /**
64863965
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668 * 0-> h263 quant 1-> mpeg quant.
669 * - encoding: set by user.
670 * - decoding: unused
b71901e6
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671 */
672 int mpeg_quant;
ce980a95 673
b71901e6 674 /**
64863965
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675 * pass1 encoding statistics output buffer.
676 * - encoding: set by lavc
677 * - decoding: unused
b71901e6 678 */
64863965 679 char *stats_out;
b71901e6
MN
680
681 /**
682 * pass2 encoding statistics input buffer.
683 * concatenated stuff from stats_out of pass1 should be placed here
64863965
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684 * - encoding: allocated/set/freed by user
685 * - decoding: unused
b71901e6
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686 */
687 char *stats_in;
688
689 /**
64863965 690 * ratecontrol qmin qmax limiting method.
b71901e6 691 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
64863965
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692 * - encoding: set by user.
693 * - decoding: unused
b71901e6 694 */
ce980a95 695 float rc_qsquish;
b71901e6 696
ce980a95
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697 float rc_qmod_amp;
698 int rc_qmod_freq;
b71901e6
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699
700 /**
64863965
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701 * ratecontrol override, see RcOverride.
702 * - encoding: allocated/set/freed by user.
703 * - decoding: unused
b71901e6 704 */
ce980a95
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705 RcOverride *rc_override;
706 int rc_override_count;
b71901e6
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707
708 /**
64863965
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709 * rate control equation.
710 * - encoding: set by user
711 * - decoding: unused
b71901e6 712 */
ce980a95 713 char *rc_eq;
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714
715 /**
64863965
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716 * maximum bitrate.
717 * - encoding: set by user.
718 * - decoding: unused
b71901e6 719 */
ce980a95 720 int rc_max_rate;
b71901e6
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721
722 /**
64863965
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723 * minimum bitrate.
724 * - encoding: set by user.
725 * - decoding: unused
b71901e6 726 */
ce980a95 727 int rc_min_rate;
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728
729 /**
64863965
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730 * decoder bitstream buffer size.
731 * - encoding: set by user.
732 * - decoding: unused
b71901e6 733 */
ce980a95
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734 int rc_buffer_size;
735 float rc_buffer_aggressivity;
b71901e6
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736
737 /**
64863965
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738 * qscale factor between p and i frames.
739 * - encoding: set by user.
740 * - decoding: unused
b71901e6
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741 */
742 float i_quant_factor;
743
744 /**
64863965 745 * qscale offset between p and i frames.
b3a391e8
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746 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
747 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
64863965
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748 * - encoding: set by user.
749 * - decoding: unused
b71901e6
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750 */
751 float i_quant_offset;
752
753 /**
64863965
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754 * initial complexity for pass1 ratecontrol.
755 * - encoding: set by user.
756 * - decoding: unused
b71901e6 757 */
ce980a95 758 float rc_initial_cplx;
917e06c8 759
b71901e6 760 /**
64863965
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761 * dct algorithm, see FF_DCT_* below.
762 * - encoding: set by user
763 * - decoding: unused
b71901e6 764 */
28db7fce 765 int dct_algo;
c7e07931 766#define FF_DCT_AUTO 0
28db7fce 767#define FF_DCT_FASTINT 1
c7e07931
MO
768#define FF_DCT_INT 2
769#define FF_DCT_MMX 3
770#define FF_DCT_MLIB 4
05c4072b 771#define FF_DCT_ALTIVEC 5
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772
773 /**
64863965
MN
774 * luminance masking (0-> disabled).
775 * - encoding: set by user
776 * - decoding: unused
c5d309f2
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777 */
778 float lumi_masking;
779
780 /**
64863965
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781 * temporary complexity masking (0-> disabled).
782 * - encoding: set by user
783 * - decoding: unused
c5d309f2
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784 */
785 float temporal_cplx_masking;
786
787 /**
64863965
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788 * spatial complexity masking (0-> disabled).
789 * - encoding: set by user
790 * - decoding: unused
c5d309f2
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791 */
792 float spatial_cplx_masking;
793
794 /**
64863965
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795 * p block masking (0-> disabled).
796 * - encoding: set by user
797 * - decoding: unused
c5d309f2
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798 */
799 float p_masking;
15415af4 800
5e746b99 801 /**
64863965
MN
802 * darkness masking (0-> disabled).
803 * - encoding: set by user
804 * - decoding: unused
5e746b99
MN
805 */
806 float dark_masking;
0c2dd16e
MN
807
808 /**
64863965
MN
809 * idct algorithm, see FF_IDCT_* below.
810 * - encoding: set by user
811 * - decoding: set by user
2ad1516a
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812 */
813 int idct_algo;
814#define FF_IDCT_AUTO 0
815#define FF_IDCT_INT 1
816#define FF_IDCT_SIMPLE 2
817#define FF_IDCT_SIMPLEMMX 3
818#define FF_IDCT_LIBMPEG2MMX 4
819#define FF_IDCT_PS2 5
820#define FF_IDCT_MLIB 6
821#define FF_IDCT_ARM 7
05c4072b 822#define FF_IDCT_ALTIVEC 8
2ad1516a 823
144f0625 824 /**
64863965
MN
825 * slice count.
826 * - encoding: set by lavc
827 * - decoding: set by user (or 0)
144f0625
MN
828 */
829 int slice_count;
830 /**
64863965
MN
831 * slice offsets in the frame in bytes.
832 * - encoding: set/allocated by lavc
833 * - decoding: set/allocated by user (or NULL)
144f0625
MN
834 */
835 int *slice_offset;
836
4d2858de 837 /**
64863965
MN
838 * error concealment flags.
839 * - encoding: unused
840 * - decoding: set by user
4d2858de
MN
841 */
842 int error_concealment;
843#define FF_EC_GUESS_MVS 1
844#define FF_EC_DEBLOCK 2
845
6b72ac63 846 /**
bec89a84 847 * dsp_mask could be add used to disable unwanted CPU features
8350df97 848 * CPU features (i.e. MMX, SSE. ...)
bec89a84
ZK
849 *
850 * with FORCE flag you may instead enable given CPU features
851 * (Dangerous: usable in case of misdetection, improper usage however will
852 * result into program crash)
853 */
854 unsigned dsp_mask;
855#define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
856 /* lower 16 bits - CPU features */
857#ifdef HAVE_MMX
858#define FF_MM_MMX 0x0001 /* standard MMX */
859#define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
860#define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
861#define FF_MM_SSE 0x0008 /* SSE functions */
862#define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
863#endif /* HAVE_MMX */
11f18faf
MN
864
865 /**
64863965
MN
866 * bits per sample/pixel from the demuxer (needed for huffyuv).
867 * - encoding: set by lavc
868 * - decoding: set by user
11f18faf
MN
869 */
870 int bits_per_sample;
871
872 /**
64863965
MN
873 * prediction method (needed for huffyuv).
874 * - encoding: set by user
875 * - decoding: unused
11f18faf
MN
876 */
877 int prediction_method;
878#define FF_PRED_LEFT 0
879#define FF_PRED_PLANE 1
880#define FF_PRED_MEDIAN 2
5d3cea3a
MN
881
882 /**
64863965
MN
883 * aspect ratio (0 if unknown).
884 * - encoding: set by user.
885 * - decoding: set by lavc.
5d3cea3a
MN
886 */
887 float aspect_ratio;
1e491e29
MN
888
889 /**
64863965
MN
890 * the picture in the bitstream.
891 * - encoding: set by lavc
892 * - decoding: set by lavc
1e491e29 893 */
492cd3a9 894 AVFrame *coded_frame;
c8c437bc
MN
895
896 /**
64863965
MN
897 * debug.
898 * - encoding: set by user.
899 * - decoding: set by user.
c8c437bc
MN
900 */
901 int debug;
902#define FF_DEBUG_PICT_INFO 1
903#define FF_DEBUG_RC 2
904#define FF_DEBUG_BITSTREAM 4
905#define FF_DEBUG_MB_TYPE 8
906#define FF_DEBUG_QP 16
907#define FF_DEBUG_MV 32
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908#define FF_DEBUG_VIS_MV 0x00000040
909#define FF_DEBUG_SKIP 0x00000080
910#define FF_DEBUG_STARTCODE 0x00000100
911#define FF_DEBUG_PTS 0x00000200
46b4feec 912#define FF_DEBUG_ER 0x00000400
140cb663
MN
913
914 /**
64863965
MN
915 * error.
916 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
917 * - decoding: unused
140cb663
MN
918 */
919 uint64_t error[4];
17a70fde
MN
920
921 /**
64863965
MN
922 * minimum MB quantizer.
923 * - encoding: set by user.
924 * - decoding: unused
17a70fde
MN
925 */
926 int mb_qmin;
927
928 /**
64863965
MN
929 * maximum MB quantizer.
930 * - encoding: set by user.
931 * - decoding: unused
17a70fde
MN
932 */
933 int mb_qmax;
1457ab52
MN
934
935 /**
64863965
MN
936 * motion estimation compare function.
937 * - encoding: set by user.
938 * - decoding: unused
1457ab52
MN
939 */
940 int me_cmp;
941 /**
64863965
MN
942 * subpixel motion estimation compare function.
943 * - encoding: set by user.
944 * - decoding: unused
1457ab52
MN
945 */
946 int me_sub_cmp;
947 /**
64863965
MN
948 * macroblock compare function (not supported yet).
949 * - encoding: set by user.
950 * - decoding: unused
1457ab52
MN
951 */
952 int mb_cmp;
953#define FF_CMP_SAD 0
954#define FF_CMP_SSE 1
955#define FF_CMP_SATD 2
956#define FF_CMP_DCT 3
957#define FF_CMP_PSNR 4
958#define FF_CMP_BIT 5
959#define FF_CMP_RD 6
960#define FF_CMP_ZERO 7
961#define FF_CMP_CHROMA 256
962
963 /**
64863965
MN
964 * ME diamond size & shape.
965 * - encoding: set by user.
966 * - decoding: unused
1457ab52
MN
967 */
968 int dia_size;
b07a5980
MN
969
970 /**
64863965
MN
971 * amount of previous MV predictors (2a+1 x 2a+1 square).
972 * - encoding: set by user.
973 * - decoding: unused
b07a5980
MN
974 */
975 int last_predictor_count;
70ac76c0 976
f5fb6b34 977 /**
64863965
MN
978 * pre pass for motion estimation.
979 * - encoding: set by user.
980 * - decoding: unused
f5fb6b34
MN
981 */
982 int pre_me;
b07a5980 983
70ac76c0 984 /**
64863965
MN
985 * motion estimation pre pass compare function.
986 * - encoding: set by user.
987 * - decoding: unused
70ac76c0
MN
988 */
989 int me_pre_cmp;
826f429a 990
70ac76c0 991 /**
64863965
MN
992 * ME pre pass diamond size & shape.
993 * - encoding: set by user.
994 * - decoding: unused
70ac76c0
MN
995 */
996 int pre_dia_size;
997
826f429a 998 /**
64863965
MN
999 * subpel ME quality.
1000 * - encoding: set by user.
1001 * - decoding: unused
826f429a
MN
1002 */
1003 int me_subpel_quality;
1004
a33c7159 1005 /**
64863965 1006 * callback to negotiate the pixelFormat.
a33c7159
MN
1007 * @param fmt is the list of formats which are supported by the codec,
1008 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1009 * the first is allways the native one
1010 * @return the choosen format
64863965
MN
1011 * - encoding: unused
1012 * - decoding: set by user, if not set then the native format will always be choosen
a33c7159
MN
1013 */
1014 enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
e2f9490e
FB
1015
1016 /**
1017 * DTG active format information (additionnal aspect ratio
1018 * information only used in DVB MPEG2 transport streams). 0 if
1019 * not set.
1020 *
64863965
MN
1021 * - encoding: unused.
1022 * - decoding: set by decoder
e2f9490e
FB
1023 */
1024 int dtg_active_format;
1025#define FF_DTG_AFD_SAME 8
1026#define FF_DTG_AFD_4_3 9
1027#define FF_DTG_AFD_16_9 10
1028#define FF_DTG_AFD_14_9 11
1029#define FF_DTG_AFD_4_3_SP_14_9 13
1030#define FF_DTG_AFD_16_9_SP_14_9 14
1031#define FF_DTG_AFD_SP_4_3 15
1032
ebbcdc9a
MN
1033 /**
1034 * Maximum motion estimation search range in subpel units.
1035 * if 0 then no limit
1036 *
64863965
MN
1037 * - encoding: set by user.
1038 * - decoding: unused.
ebbcdc9a 1039 */
59e0ac8e 1040 int me_range;
ebbcdc9a 1041
de6d9b64
FB
1042} AVCodecContext;
1043
97d96aaa 1044
64863965
MN
1045/**
1046 * AVOption.
1047 */
97d96aaa
ZK
1048typedef struct AVOption {
1049 /** options' name */
1050 const char *name; /* if name is NULL, it indicates a link to next */
bec89a84
ZK
1051 /** short English text help or const struct AVOption* subpointer */
1052 const char *help; // const struct AVOption* sub;
97d96aaa
ZK
1053 /** offset to context structure where the parsed value should be stored */
1054 int offset;
1055 /** options' type */
1056 int type;
64863965
MN
1057#define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1058#define FF_OPT_TYPE_DOUBLE 2 ///< double
1059#define FF_OPT_TYPE_INT 3 ///< integer
1060#define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1061#define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
97d96aaa
ZK
1062//#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1063#define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1064#define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1065 /** min value (min == max -> no limits) */
1066 double min;
1067 /** maximum value for double/int */
1068 double max;
1069 /** default boo [0,1]l/double/int value */
1070 double defval;
1071 /**
1072 * default string value (with optional semicolon delimited extra option-list
1073 * i.e. option1;option2;option3
1074 * defval might select other then first argument as default
1075 */
1076 const char *defstr;
97d96aaa
ZK
1077#define FF_OPT_MAX_DEPTH 10
1078} AVOption;
1079
64863965 1080/**
bec89a84
ZK
1081 * Parse option(s) and sets fields in passed structure
1082 * @param strct structure where the parsed results will be written
1083 * @param list list with AVOptions
1084 * @param opts string with options for parsing
1085 */
1086int avoption_parse(void* strct, const AVOption* list, const char* opts);
1087
1088
1089/**
64863965
MN
1090 * AVCodec.
1091 */
de6d9b64 1092typedef struct AVCodec {
18f77016 1093 const char *name;
de6d9b64
FB
1094 int type;
1095 int id;
1096 int priv_data_size;
1097 int (*init)(AVCodecContext *);
0c1a9eda 1098 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
de6d9b64 1099 int (*close)(AVCodecContext *);
0fd90455 1100 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
0c1a9eda 1101 uint8_t *buf, int buf_size);
bf89e6b1 1102 int capabilities;
97d96aaa 1103 const AVOption *options;
de6d9b64
FB
1104 struct AVCodec *next;
1105} AVCodec;
1106
97d96aaa 1107/**
d7425f59
MN
1108 * four components are given, that's all.
1109 * the last component is alpha
1110 */
de6d9b64 1111typedef struct AVPicture {
0c1a9eda 1112 uint8_t *data[4];
d7425f59 1113 int linesize[4];
de6d9b64
FB
1114} AVPicture;
1115
1116extern AVCodec ac3_encoder;
1117extern AVCodec mp2_encoder;
9d36bdc9 1118extern AVCodec mp3lame_encoder;
81e0d0b4 1119extern AVCodec oggvorbis_encoder;
de6d9b64
FB
1120extern AVCodec mpeg1video_encoder;
1121extern AVCodec h263_encoder;
1122extern AVCodec h263p_encoder;
1123extern AVCodec rv10_encoder;
1124extern AVCodec mjpeg_encoder;
bf89e6b1 1125extern AVCodec mpeg4_encoder;
84afee34
MN
1126extern AVCodec msmpeg4v1_encoder;
1127extern AVCodec msmpeg4v2_encoder;
1128extern AVCodec msmpeg4v3_encoder;
0151a6f5
MN
1129extern AVCodec wmv1_encoder;
1130extern AVCodec wmv2_encoder;
11f18faf 1131extern AVCodec huffyuv_encoder;
de6d9b64
FB
1132
1133extern AVCodec h263_decoder;
bf89e6b1 1134extern AVCodec mpeg4_decoder;
84afee34
MN
1135extern AVCodec msmpeg4v1_decoder;
1136extern AVCodec msmpeg4v2_decoder;
1137extern AVCodec msmpeg4v3_decoder;
e1a9dbff 1138extern AVCodec wmv1_decoder;
0151a6f5 1139extern AVCodec wmv2_decoder;
de6d9b64
FB
1140extern AVCodec mpeg_decoder;
1141extern AVCodec h263i_decoder;
1142extern AVCodec rv10_decoder;
be8ffec9 1143extern AVCodec svq1_decoder;
020fcc94
FB
1144extern AVCodec dvvideo_decoder;
1145extern AVCodec dvaudio_decoder;
bc8d1857
FB
1146extern AVCodec wmav1_decoder;
1147extern AVCodec wmav2_decoder;
4e66ab3b 1148extern AVCodec mjpeg_decoder;
b135d9fb 1149extern AVCodec mjpegb_decoder;
4b1f4f23 1150extern AVCodec mp2_decoder;
a96b68b7 1151extern AVCodec mp3_decoder;
3f95e843
FR
1152extern AVCodec mace3_decoder;
1153extern AVCodec mace6_decoder;
11f18faf 1154extern AVCodec huffyuv_decoder;
3aca208a 1155extern AVCodec oggvorbis_decoder;
f70f7c6d 1156extern AVCodec cyuv_decoder;
de6d9b64 1157
a96b68b7
FB
1158/* pcm codecs */
1159#define PCM_CODEC(id, name) \
1160extern AVCodec name ## _decoder; \
f11d3f23 1161extern AVCodec name ## _encoder
a96b68b7
FB
1162
1163PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1164PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1165PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1166PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1167PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1168PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1169PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1170PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1171
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FR
1172/* adpcm codecs */
1173
1174PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1175PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1176PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1177
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1178#undef PCM_CODEC
1179
1180/* dummy raw video codec */
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FB
1181extern AVCodec rawvideo_codec;
1182
1183/* the following codecs use external GPL libs */
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FB
1184extern AVCodec ac3_decoder;
1185
1186/* resample.c */
1187
1188struct ReSampleContext;
1189
1190typedef struct ReSampleContext ReSampleContext;
1191
1192ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1193 int output_rate, int input_rate);
1194int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1195void audio_resample_close(ReSampleContext *s);
1196
1197/* YUV420 format is assumed ! */
1198
1199struct ImgReSampleContext;
1200
1201typedef struct ImgReSampleContext ImgReSampleContext;
1202
1203ImgReSampleContext *img_resample_init(int output_width, int output_height,
1204 int input_width, int input_height);
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1205
1206ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1207 int iwidth, int iheight,
1208 int topBand, int bottomBand,
1209 int leftBand, int rightBand);
1210
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1211void img_resample(ImgReSampleContext *s,
1212 AVPicture *output, AVPicture *input);
1213
1214void img_resample_close(ImgReSampleContext *s);
1215
0c1a9eda 1216int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2d1a4094 1217 int pix_fmt, int width, int height);
219b06c6 1218int avpicture_get_size(int pix_fmt, int width, int height);
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1219void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1220const char *avcodec_get_pix_fmt_name(int pix_fmt);
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FB
1221
1222/* convert among pixel formats */
1223int img_convert(AVPicture *dst, int dst_pix_fmt,
1224 AVPicture *src, int pix_fmt,
1225 int width, int height);
1226
1227/* deinterlace a picture */
1228int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
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FB
1229 int pix_fmt, int width, int height);
1230
1231/* external high level API */
1232
1233extern AVCodec *first_avcodec;
1234
156e5023 1235/* returns LIBAVCODEC_VERSION_INT constant */
51a49663 1236unsigned avcodec_version(void);
8bceb6af 1237/* returns LIBAVCODEC_BUILD constant */
51a49663 1238unsigned avcodec_build(void);
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1239void avcodec_init(void);
1240
1241void register_avcodec(AVCodec *format);
1242AVCodec *avcodec_find_encoder(enum CodecID id);
98f3b098 1243AVCodec *avcodec_find_encoder_by_name(const char *name);
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FB
1244AVCodec *avcodec_find_decoder(enum CodecID id);
1245AVCodec *avcodec_find_decoder_by_name(const char *name);
1246void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1247
1e491e29 1248void avcodec_get_context_defaults(AVCodecContext *s);
7ffbb60e 1249AVCodecContext *avcodec_alloc_context(void);
492cd3a9 1250AVFrame *avcodec_alloc_frame(void);
1e491e29 1251
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1252int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1253void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1e491e29 1254
de6d9b64 1255int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
0c1a9eda 1256int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
de6d9b64 1257 int *frame_size_ptr,
0c1a9eda 1258 uint8_t *buf, int buf_size);
492cd3a9 1259int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
de6d9b64 1260 int *got_picture_ptr,
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1261 uint8_t *buf, int buf_size);
1262int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
917e06c8 1263 int *data_size_ptr,
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1264 uint8_t *buf, int buf_size);
1265int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
de6d9b64 1266 const short *samples);
0c1a9eda 1267int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
492cd3a9 1268 const AVFrame *pict);
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1269
1270int avcodec_close(AVCodecContext *avctx);
1271
1272void avcodec_register_all(void);
a96b68b7 1273
1c2a8c7f
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1274void avcodec_flush_buffers(AVCodecContext *avctx);
1275
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1276/* misc usefull functions */
1277/**
1278 * reduce a fraction.
1279 * this is usefull for framerate calculations
1280 * @param max the maximum allowed for dst_nom & dst_den
1281 * @return 1 if exact, 0 otherwise
1282 */
1283int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1284
1285/**
1286 * rescale a 64bit integer.
1287 * a simple a*b/c isnt possible as it can overflow
1288 */
1289int64_t av_rescale(int64_t a, int b, int c);
628d601b 1290
628d601b 1291
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1292/**
1293 * Interface for 0.5.0 version
1294 *
1295 * do not even think about it's usage for this moment
1296 */
1297
1298typedef struct {
64863965 1299 /// compressed size used from given memory buffer
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1300 int size;
1301 /// I/P/B frame type
1302 int frame_type;
1303} avc_enc_result_t;
1304
1305/**
1306 * Commands
1307 * order can't be changed - once it was defined
1308 */
1309typedef enum {
1310 // general commands
1311 AVC_OPEN_BY_NAME = 0xACA000,
1312 AVC_OPEN_BY_CODEC_ID,
1313 AVC_OPEN_BY_FOURCC,
1314 AVC_CLOSE,
1315
1316 AVC_FLUSH,
1317 // pin - struct { uint8_t* src, uint_t src_size }
1318 // pout - struct { AVPicture* img, consumed_bytes,
1319 AVC_DECODE,
1320 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1321 // pout - uint_t used_from_dest_size
1322 AVC_ENCODE,
1323
1324 // query/get video commands
1325 AVC_GET_VERSION = 0xACB000,
1326 AVC_GET_WIDTH,
1327 AVC_GET_HEIGHT,
1328 AVC_GET_DELAY,
1329 AVC_GET_QUANT_TABLE,
1330 // ...
1331
1332 // query/get audio commands
1333 AVC_GET_FRAME_SIZE = 0xABC000,
1334
1335 // maybe define some simple structure which
1336 // might be passed to the user - but they can't
1337 // contain any codec specific parts and these
1338 // calls are usualy necessary only few times
1339
1340 // set video commands
1341 AVC_SET_WIDTH = 0xACD000,
1342 AVC_SET_HEIGHT,
1343
1344 // set video encoding commands
1345 AVC_SET_FRAME_RATE = 0xACD800,
1346 AVC_SET_QUALITY,
1347 AVC_SET_HURRY_UP,
1348
1349 // set audio commands
1350 AVC_SET_SAMPLE_RATE = 0xACE000,
1351 AVC_SET_CHANNELS,
1352
1353} avc_cmd_t;
1354
1355/**
1356 * \param handle allocated private structure by libavcodec
1357 * for initialization pass NULL - will be returned pout
1358 * user is supposed to know nothing about its structure
1359 * \param cmd type of operation to be performed
1360 * \param pint input parameter
1361 * \param pout output parameter
1362 *
1363 * \returns command status - eventually for query command it might return
1364 * integer resulting value
1365 */
1366int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1367
544eb99c 1368/* memory */
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1369void *av_malloc(unsigned int size);
1370void *av_mallocz(unsigned int size);
8e1e6f31 1371void *av_realloc(void *ptr, unsigned int size);
544eb99c 1372void av_free(void *ptr);
8e1e6f31 1373char *av_strdup(const char *s);
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FB
1374void __av_freep(void **ptr);
1375#define av_freep(p) __av_freep((void **)(p))
97d96aaa 1376void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
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ZK
1377/* for static data only */
1378/* call av_free_static to release all staticaly allocated tables */
628d601b 1379void av_free_static(void);
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ZK
1380void *__av_mallocz_static(void** location, unsigned int size);
1381#define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
544eb99c 1382
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1383#ifdef __cplusplus
1384}
1385#endif
1386
a96b68b7 1387#endif /* AVCODEC_H */