binary compatibility fix
[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 /**
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392 * width / height.
393 * - encoding: MUST be set by user.
394 * - decoding: set by user, some codecs might override / change it during playback
b71901e6 395 */
de6d9b64 396 int width, height;
b71901e6 397
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398#define FF_ASPECT_SQUARE 1
399#define FF_ASPECT_4_3_625 2
400#define FF_ASPECT_4_3_525 3
401#define FF_ASPECT_16_9_625 4
402#define FF_ASPECT_16_9_525 5
e769f053 403#define FF_ASPECT_EXTENDED 15
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404
405 /**
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406 * the number of pictures in a group of pitures, or 0 for intra_only.
407 * - encoding: set by user.
408 * - decoding: unused
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409 */
410 int gop_size;
411
412 /**
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413 * pixel format, see PIX_FMT_xxx.
414 * - encoding: unused
415 * - decoding: set by lavc.
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416 */
417 enum PixelFormat pix_fmt;
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418
419 /**
420 * Frame rate emulation. If not zero lower layer (i.e. format handler)
421 * has to read frames at native frame rate.
422 * - encoding: set by user.
423 * - decoding: unused.
424 */
425 int rate_emu;
426
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427 /**
428 * if non NULL, 'draw_horiz_band' is called by the libavcodec
429 * decoder to draw an horizontal band. It improve cache usage. Not
430 * all codecs can do that. You must check the codec capabilities
431 * before
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432 * - encoding: unused
433 * - decoding: set by user.
b71901e6 434 */
bf89e6b1 435 void (*draw_horiz_band)(struct AVCodecContext *s,
0c1a9eda 436 uint8_t **src_ptr, int linesize,
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437 int y, int width, int height);
438
de6d9b64 439 /* audio only */
64863965 440 int sample_rate; ///< samples per sec
de6d9b64 441 int channels;
64863965 442 int sample_fmt; ///< sample format, currenly unused
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443
444 /* the following data should not be initialized */
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445 int frame_size; ///< in samples, initialized when calling 'init'
446 int frame_number; ///< audio or video frame number
447 int real_pict_num; ///< returns the real picture number of previous encoded frame
1e491e29 448
b71901e6 449 /**
b71901e6 450 * number of frames the decoded output will be delayed relative to
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451 * the encoded input.
452 * - encoding: set by lavc.
453 * - decoding: unused
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454 */
455 int delay;
1ff662cc 456
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457 /* - encoding parameters */
458 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
459 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
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460
461 /**
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462 * minimum quantizer.
463 * - encoding: set by user.
464 * - decoding: unused
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465 */
466 int qmin;
467
468 /**
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469 * maximum quantizer.
470 * - encoding: set by user.
471 * - decoding: unused
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472 */
473 int qmax;
474
475 /**
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476 * maximum quantizer difference etween frames.
477 * - encoding: set by user.
478 * - decoding: unused
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479 */
480 int max_qdiff;
481
482 /**
64863965 483 * maximum number of b frames between non b frames.
b71901e6 484 * note: the output will be delayed by max_b_frames+1 relative to the input
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485 * - encoding: set by user.
486 * - decoding: unused
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487 */
488 int max_b_frames;
489
490 /**
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491 * qscale factor between ip and b frames.
492 * - encoding: set by user.
493 * - decoding: unused
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494 */
495 float b_quant_factor;
496
497 /** obsolete FIXME remove */
498 int rc_strategy;
8b4c7dbc 499 int b_frame_strategy;
9dbcbd92 500
b71901e6 501 /**
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502 * hurry up amount.
503 * - encoding: unused
504 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
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505 */
506 int hurry_up;
2417652e 507
de6d9b64 508 struct AVCodec *codec;
b71901e6 509
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510 void *priv_data;
511
644d98a4 512 /* The following data is for RTP friendly coding */
1f6b6e50 513 /* By now only H.263/H.263+/MPEG4 coder honours this */
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514 int rtp_mode; /* 1 for activate RTP friendly-mode */
515 /* highers numbers represent more error-prone */
516 /* enviroments, by now just "1" exist */
517
518 int rtp_payload_size; /* The size of the RTP payload, the coder will */
519 /* do it's best to deliver a chunk with size */
520 /* below rtp_payload_size, the chunk will start */
521 /* with a start code on some codecs like H.263 */
522 /* This doesn't take account of any particular */
523 /* headers inside the transmited RTP payload */
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524
525
526 /* The RTP callcack: This function is called */
527 /* every time the encoder as a packet to send */
528 /* Depends on the encoder if the data starts */
529 /* with a Start Code (it should) H.263 does */
530 void (*rtp_callback)(void *data, int size, int packet_number);
531
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532 /* statistics, used for 2-pass encoding */
533 int mv_bits;
534 int header_bits;
535 int i_tex_bits;
536 int p_tex_bits;
537 int i_count;
538 int p_count;
539 int skip_count;
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540 int misc_bits;
541
542 /**
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543 * number of bits used for the previously encoded frame.
544 * - encoding: set by lavc
7004ffb3 545 * - decoding: unused
b71901e6 546 */
098eefe1 547 int frame_bits;
7004ffb3 548
b71901e6 549 /**
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550 * private data of the user, can be used to carry app specific stuff.
551 * - encoding: set by user
552 * - decoding: set by user
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553 */
554 void *opaque;
555
de6d9b64 556 char codec_name[32];
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557 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
558 enum CodecID codec_id; /* see CODEC_ID_xxx */
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559
560 /**
561 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
562 * this is used to workaround some encoder bugs
563 * - encoding: unused
564 * - decoding: set by user, will be converted to upper case by lavc during init
565 */
566 unsigned int codec_tag;
92ba5ffb 567
b71901e6 568 /**
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569 * workaround bugs in encoders which sometimes cannot be detected automatically.
570 * - encoding: unused
571 * - decoding: set by user
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572 */
573 int workaround_bugs;
64863965 574#define FF_BUG_AUTODETECT 1 ///< autodetection
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575#define FF_BUG_OLD_MSMPEG4 2
576#define FF_BUG_XVID_ILACE 4
577#define FF_BUG_UMP4 8
578#define FF_BUG_NO_PADDING 16
579#define FF_BUG_AC_VLC 32
03e93d35 580#define FF_BUG_QPEL_CHROMA 64
db794953 581#define FF_BUG_STD_QPEL 128
36df8805 582#define FF_BUG_QPEL_CHROMA2 256
c40c3482 583#define FF_BUG_DIRECT_BLOCKSIZE 512
1c6dcb0f 584#define FF_BUG_EDGE 1024
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585//#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
586
b71901e6 587 /**
64863965
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588 * luma single coeff elimination threshold.
589 * - encoding: set by user
590 * - decoding: unused
b71901e6 591 */
1f6b6e50 592 int luma_elim_threshold;
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593
594 /**
64863965
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595 * chroma single coeff elimination threshold.
596 * - encoding: set by user
597 * - decoding: unused
b71901e6 598 */
1f6b6e50 599 int chroma_elim_threshold;
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600
601 /**
64863965
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602 * strictly follow the std (MPEG4, ...).
603 * - encoding: set by user
604 * - decoding: unused
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605 */
606 int strict_std_compliance;
607
608 /**
64863965 609 * qscale offset between ip and b frames.
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610 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
611 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
64863965
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612 * - encoding: set by user.
613 * - decoding: unused
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614 */
615 float b_quant_offset;
616
617 /**
ce3bcaed 618 * error resilience higher values will detect more errors but may missdetect
64863965
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619 * some more or less valid parts as errors.
620 * - encoding: unused
621 * - decoding: set by user
b71901e6 622 */
1f6b6e50 623 int error_resilience;
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624#define FF_ER_CAREFULL 1
625#define FF_ER_COMPLIANT 2
626#define FF_ER_AGGRESSIVE 3
627#define FF_ER_VERY_AGGRESSIVE 4
ae72cda6 628
6b72ac63 629 /**
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630 * called at the beginning of each frame to get a buffer for it.
631 * if pic.reference is set then the frame will be read later by lavc
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632 * - encoding: unused
633 * - decoding: set by lavc, user can override
b71901e6 634 */
492cd3a9 635 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
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636
637 /**
1e491e29
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638 * called to release buffers which where allocated with get_buffer.
639 * a released buffer can be reused in get_buffer()
640 * pic.data[*] must be set to NULL
64863965
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641 * - encoding: unused
642 * - decoding: set by lavc, user can override
b71901e6 643 */
492cd3a9 644 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
0fd90455 645
b71901e6 646 /**
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647 * is 1 if the decoded stream contains b frames, 0 otherwise.
648 * - encoding: unused
649 * - decoding: set by lavc
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650 */
651 int has_b_frames;
b71901e6 652
64863965 653 int block_align; ///< used by some WAV based audio codecs
ce980a95 654
64863965 655 int parse_only; /* - decoding only: if true, only parsing is done
917e06c8
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656 (function avcodec_parse_frame()). The frame
657 data is returned. Only MPEG codecs support this now. */
ce980a95 658
b71901e6 659 /**
64863965
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660 * 0-> h263 quant 1-> mpeg quant.
661 * - encoding: set by user.
662 * - decoding: unused
b71901e6
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663 */
664 int mpeg_quant;
ce980a95 665
b71901e6 666 /**
64863965
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667 * pass1 encoding statistics output buffer.
668 * - encoding: set by lavc
669 * - decoding: unused
b71901e6 670 */
64863965 671 char *stats_out;
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672
673 /**
674 * pass2 encoding statistics input buffer.
675 * concatenated stuff from stats_out of pass1 should be placed here
64863965
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676 * - encoding: allocated/set/freed by user
677 * - decoding: unused
b71901e6
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678 */
679 char *stats_in;
680
681 /**
64863965 682 * ratecontrol qmin qmax limiting method.
b71901e6 683 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
64863965
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684 * - encoding: set by user.
685 * - decoding: unused
b71901e6 686 */
ce980a95 687 float rc_qsquish;
b71901e6 688
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689 float rc_qmod_amp;
690 int rc_qmod_freq;
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691
692 /**
64863965
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693 * ratecontrol override, see RcOverride.
694 * - encoding: allocated/set/freed by user.
695 * - decoding: unused
b71901e6 696 */
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697 RcOverride *rc_override;
698 int rc_override_count;
b71901e6
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699
700 /**
64863965
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701 * rate control equation.
702 * - encoding: set by user
703 * - decoding: unused
b71901e6 704 */
ce980a95 705 char *rc_eq;
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706
707 /**
64863965
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708 * maximum bitrate.
709 * - encoding: set by user.
710 * - decoding: unused
b71901e6 711 */
ce980a95 712 int rc_max_rate;
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713
714 /**
64863965
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715 * minimum bitrate.
716 * - encoding: set by user.
717 * - decoding: unused
b71901e6 718 */
ce980a95 719 int rc_min_rate;
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720
721 /**
64863965
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722 * decoder bitstream buffer size.
723 * - encoding: set by user.
724 * - decoding: unused
b71901e6 725 */
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726 int rc_buffer_size;
727 float rc_buffer_aggressivity;
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728
729 /**
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730 * qscale factor between p and i frames.
731 * - encoding: set by user.
732 * - decoding: unused
b71901e6
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733 */
734 float i_quant_factor;
735
736 /**
64863965 737 * qscale offset between p and i frames.
b3a391e8
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738 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
739 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
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740 * - encoding: set by user.
741 * - decoding: unused
b71901e6
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742 */
743 float i_quant_offset;
744
745 /**
64863965
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746 * initial complexity for pass1 ratecontrol.
747 * - encoding: set by user.
748 * - decoding: unused
b71901e6 749 */
ce980a95 750 float rc_initial_cplx;
917e06c8 751
b71901e6 752 /**
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753 * dct algorithm, see FF_DCT_* below.
754 * - encoding: set by user
755 * - decoding: unused
b71901e6 756 */
28db7fce 757 int dct_algo;
c7e07931 758#define FF_DCT_AUTO 0
28db7fce 759#define FF_DCT_FASTINT 1
c7e07931
MO
760#define FF_DCT_INT 2
761#define FF_DCT_MMX 3
762#define FF_DCT_MLIB 4
05c4072b 763#define FF_DCT_ALTIVEC 5
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764
765 /**
64863965
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766 * luminance masking (0-> disabled).
767 * - encoding: set by user
768 * - decoding: unused
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769 */
770 float lumi_masking;
771
772 /**
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773 * temporary complexity masking (0-> disabled).
774 * - encoding: set by user
775 * - decoding: unused
c5d309f2
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776 */
777 float temporal_cplx_masking;
778
779 /**
64863965
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780 * spatial complexity masking (0-> disabled).
781 * - encoding: set by user
782 * - decoding: unused
c5d309f2
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783 */
784 float spatial_cplx_masking;
785
786 /**
64863965
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787 * p block masking (0-> disabled).
788 * - encoding: set by user
789 * - decoding: unused
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790 */
791 float p_masking;
15415af4 792
5e746b99 793 /**
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794 * darkness masking (0-> disabled).
795 * - encoding: set by user
796 * - decoding: unused
5e746b99
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797 */
798 float dark_masking;
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799
800 /**
64863965
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801 * idct algorithm, see FF_IDCT_* below.
802 * - encoding: set by user
803 * - decoding: set by user
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804 */
805 int idct_algo;
806#define FF_IDCT_AUTO 0
807#define FF_IDCT_INT 1
808#define FF_IDCT_SIMPLE 2
809#define FF_IDCT_SIMPLEMMX 3
810#define FF_IDCT_LIBMPEG2MMX 4
811#define FF_IDCT_PS2 5
812#define FF_IDCT_MLIB 6
813#define FF_IDCT_ARM 7
05c4072b 814#define FF_IDCT_ALTIVEC 8
2ad1516a 815
144f0625 816 /**
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817 * slice count.
818 * - encoding: set by lavc
819 * - decoding: set by user (or 0)
144f0625
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820 */
821 int slice_count;
822 /**
64863965
MN
823 * slice offsets in the frame in bytes.
824 * - encoding: set/allocated by lavc
825 * - decoding: set/allocated by user (or NULL)
144f0625
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826 */
827 int *slice_offset;
828
4d2858de 829 /**
64863965
MN
830 * error concealment flags.
831 * - encoding: unused
832 * - decoding: set by user
4d2858de
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833 */
834 int error_concealment;
835#define FF_EC_GUESS_MVS 1
836#define FF_EC_DEBLOCK 2
837
6b72ac63 838 /**
bec89a84 839 * dsp_mask could be add used to disable unwanted CPU features
8350df97 840 * CPU features (i.e. MMX, SSE. ...)
bec89a84
ZK
841 *
842 * with FORCE flag you may instead enable given CPU features
843 * (Dangerous: usable in case of misdetection, improper usage however will
844 * result into program crash)
845 */
846 unsigned dsp_mask;
847#define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
848 /* lower 16 bits - CPU features */
849#ifdef HAVE_MMX
850#define FF_MM_MMX 0x0001 /* standard MMX */
851#define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
852#define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
853#define FF_MM_SSE 0x0008 /* SSE functions */
854#define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
855#endif /* HAVE_MMX */
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856
857 /**
64863965
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858 * bits per sample/pixel from the demuxer (needed for huffyuv).
859 * - encoding: set by lavc
860 * - decoding: set by user
11f18faf
MN
861 */
862 int bits_per_sample;
863
864 /**
64863965
MN
865 * prediction method (needed for huffyuv).
866 * - encoding: set by user
867 * - decoding: unused
11f18faf
MN
868 */
869 int prediction_method;
870#define FF_PRED_LEFT 0
871#define FF_PRED_PLANE 1
872#define FF_PRED_MEDIAN 2
5d3cea3a
MN
873
874 /**
64863965
MN
875 * aspect ratio (0 if unknown).
876 * - encoding: set by user.
877 * - decoding: set by lavc.
5d3cea3a
MN
878 */
879 float aspect_ratio;
1e491e29
MN
880
881 /**
64863965
MN
882 * the picture in the bitstream.
883 * - encoding: set by lavc
884 * - decoding: set by lavc
1e491e29 885 */
492cd3a9 886 AVFrame *coded_frame;
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MN
887
888 /**
64863965
MN
889 * debug.
890 * - encoding: set by user.
891 * - decoding: set by user.
c8c437bc
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892 */
893 int debug;
894#define FF_DEBUG_PICT_INFO 1
895#define FF_DEBUG_RC 2
896#define FF_DEBUG_BITSTREAM 4
897#define FF_DEBUG_MB_TYPE 8
898#define FF_DEBUG_QP 16
899#define FF_DEBUG_MV 32
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900#define FF_DEBUG_VIS_MV 0x00000040
901#define FF_DEBUG_SKIP 0x00000080
902#define FF_DEBUG_STARTCODE 0x00000100
903#define FF_DEBUG_PTS 0x00000200
46b4feec 904#define FF_DEBUG_ER 0x00000400
140cb663
MN
905
906 /**
64863965
MN
907 * error.
908 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
909 * - decoding: unused
140cb663
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910 */
911 uint64_t error[4];
17a70fde
MN
912
913 /**
64863965
MN
914 * minimum MB quantizer.
915 * - encoding: set by user.
916 * - decoding: unused
17a70fde
MN
917 */
918 int mb_qmin;
919
920 /**
64863965
MN
921 * maximum MB quantizer.
922 * - encoding: set by user.
923 * - decoding: unused
17a70fde
MN
924 */
925 int mb_qmax;
1457ab52
MN
926
927 /**
64863965
MN
928 * motion estimation compare function.
929 * - encoding: set by user.
930 * - decoding: unused
1457ab52
MN
931 */
932 int me_cmp;
933 /**
64863965
MN
934 * subpixel motion estimation compare function.
935 * - encoding: set by user.
936 * - decoding: unused
1457ab52
MN
937 */
938 int me_sub_cmp;
939 /**
64863965
MN
940 * macroblock compare function (not supported yet).
941 * - encoding: set by user.
942 * - decoding: unused
1457ab52
MN
943 */
944 int mb_cmp;
945#define FF_CMP_SAD 0
946#define FF_CMP_SSE 1
947#define FF_CMP_SATD 2
948#define FF_CMP_DCT 3
949#define FF_CMP_PSNR 4
950#define FF_CMP_BIT 5
951#define FF_CMP_RD 6
952#define FF_CMP_ZERO 7
953#define FF_CMP_CHROMA 256
954
955 /**
64863965
MN
956 * ME diamond size & shape.
957 * - encoding: set by user.
958 * - decoding: unused
1457ab52
MN
959 */
960 int dia_size;
b07a5980
MN
961
962 /**
64863965
MN
963 * amount of previous MV predictors (2a+1 x 2a+1 square).
964 * - encoding: set by user.
965 * - decoding: unused
b07a5980
MN
966 */
967 int last_predictor_count;
70ac76c0 968
f5fb6b34 969 /**
64863965
MN
970 * pre pass for motion estimation.
971 * - encoding: set by user.
972 * - decoding: unused
f5fb6b34
MN
973 */
974 int pre_me;
b07a5980 975
70ac76c0 976 /**
64863965
MN
977 * motion estimation pre pass compare function.
978 * - encoding: set by user.
979 * - decoding: unused
70ac76c0
MN
980 */
981 int me_pre_cmp;
826f429a 982
70ac76c0 983 /**
64863965
MN
984 * ME pre pass diamond size & shape.
985 * - encoding: set by user.
986 * - decoding: unused
70ac76c0
MN
987 */
988 int pre_dia_size;
989
826f429a 990 /**
64863965
MN
991 * subpel ME quality.
992 * - encoding: set by user.
993 * - decoding: unused
826f429a
MN
994 */
995 int me_subpel_quality;
996
a33c7159 997 /**
64863965 998 * callback to negotiate the pixelFormat.
a33c7159
MN
999 * @param fmt is the list of formats which are supported by the codec,
1000 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1001 * the first is allways the native one
1002 * @return the choosen format
64863965
MN
1003 * - encoding: unused
1004 * - decoding: set by user, if not set then the native format will always be choosen
a33c7159
MN
1005 */
1006 enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
e2f9490e
FB
1007
1008 /**
1009 * DTG active format information (additionnal aspect ratio
1010 * information only used in DVB MPEG2 transport streams). 0 if
1011 * not set.
1012 *
64863965
MN
1013 * - encoding: unused.
1014 * - decoding: set by decoder
e2f9490e
FB
1015 */
1016 int dtg_active_format;
1017#define FF_DTG_AFD_SAME 8
1018#define FF_DTG_AFD_4_3 9
1019#define FF_DTG_AFD_16_9 10
1020#define FF_DTG_AFD_14_9 11
1021#define FF_DTG_AFD_4_3_SP_14_9 13
1022#define FF_DTG_AFD_16_9_SP_14_9 14
1023#define FF_DTG_AFD_SP_4_3 15
1024
ebbcdc9a
MN
1025 /**
1026 * Maximum motion estimation search range in subpel units.
1027 * if 0 then no limit
1028 *
64863965
MN
1029 * - encoding: set by user.
1030 * - decoding: unused.
ebbcdc9a 1031 */
59e0ac8e 1032 int me_range;
ebbcdc9a 1033
65f7062d
MN
1034 /**
1035 * frame_rate_base.
1036 * for variable fps this is 1
1037 * - encoding: set by user.
1038 * - decoding: set by lavc.
1039 * @todo move this after frame_rate
1040 */
1041 int frame_rate_base;
1042
de6d9b64
FB
1043} AVCodecContext;
1044
97d96aaa 1045
64863965
MN
1046/**
1047 * AVOption.
1048 */
97d96aaa
ZK
1049typedef struct AVOption {
1050 /** options' name */
1051 const char *name; /* if name is NULL, it indicates a link to next */
bec89a84
ZK
1052 /** short English text help or const struct AVOption* subpointer */
1053 const char *help; // const struct AVOption* sub;
97d96aaa
ZK
1054 /** offset to context structure where the parsed value should be stored */
1055 int offset;
1056 /** options' type */
1057 int type;
64863965
MN
1058#define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1059#define FF_OPT_TYPE_DOUBLE 2 ///< double
1060#define FF_OPT_TYPE_INT 3 ///< integer
1061#define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1062#define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
97d96aaa
ZK
1063//#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1064#define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1065#define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1066 /** min value (min == max -> no limits) */
1067 double min;
1068 /** maximum value for double/int */
1069 double max;
1070 /** default boo [0,1]l/double/int value */
1071 double defval;
1072 /**
1073 * default string value (with optional semicolon delimited extra option-list
1074 * i.e. option1;option2;option3
1075 * defval might select other then first argument as default
1076 */
1077 const char *defstr;
97d96aaa
ZK
1078#define FF_OPT_MAX_DEPTH 10
1079} AVOption;
1080
64863965 1081/**
bec89a84
ZK
1082 * Parse option(s) and sets fields in passed structure
1083 * @param strct structure where the parsed results will be written
1084 * @param list list with AVOptions
1085 * @param opts string with options for parsing
1086 */
1087int avoption_parse(void* strct, const AVOption* list, const char* opts);
1088
1089
1090/**
64863965
MN
1091 * AVCodec.
1092 */
de6d9b64 1093typedef struct AVCodec {
18f77016 1094 const char *name;
de6d9b64
FB
1095 int type;
1096 int id;
1097 int priv_data_size;
1098 int (*init)(AVCodecContext *);
0c1a9eda 1099 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
de6d9b64 1100 int (*close)(AVCodecContext *);
0fd90455 1101 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
0c1a9eda 1102 uint8_t *buf, int buf_size);
bf89e6b1 1103 int capabilities;
97d96aaa 1104 const AVOption *options;
de6d9b64
FB
1105 struct AVCodec *next;
1106} AVCodec;
1107
97d96aaa 1108/**
d7425f59
MN
1109 * four components are given, that's all.
1110 * the last component is alpha
1111 */
de6d9b64 1112typedef struct AVPicture {
0c1a9eda 1113 uint8_t *data[4];
d7425f59 1114 int linesize[4];
de6d9b64
FB
1115} AVPicture;
1116
1117extern AVCodec ac3_encoder;
1118extern AVCodec mp2_encoder;
9d36bdc9 1119extern AVCodec mp3lame_encoder;
81e0d0b4 1120extern AVCodec oggvorbis_encoder;
de6d9b64
FB
1121extern AVCodec mpeg1video_encoder;
1122extern AVCodec h263_encoder;
1123extern AVCodec h263p_encoder;
1124extern AVCodec rv10_encoder;
1125extern AVCodec mjpeg_encoder;
bf89e6b1 1126extern AVCodec mpeg4_encoder;
84afee34
MN
1127extern AVCodec msmpeg4v1_encoder;
1128extern AVCodec msmpeg4v2_encoder;
1129extern AVCodec msmpeg4v3_encoder;
0151a6f5
MN
1130extern AVCodec wmv1_encoder;
1131extern AVCodec wmv2_encoder;
11f18faf 1132extern AVCodec huffyuv_encoder;
de6d9b64
FB
1133
1134extern AVCodec h263_decoder;
bf89e6b1 1135extern AVCodec mpeg4_decoder;
84afee34
MN
1136extern AVCodec msmpeg4v1_decoder;
1137extern AVCodec msmpeg4v2_decoder;
1138extern AVCodec msmpeg4v3_decoder;
e1a9dbff 1139extern AVCodec wmv1_decoder;
0151a6f5 1140extern AVCodec wmv2_decoder;
de6d9b64
FB
1141extern AVCodec mpeg_decoder;
1142extern AVCodec h263i_decoder;
1143extern AVCodec rv10_decoder;
be8ffec9 1144extern AVCodec svq1_decoder;
020fcc94
FB
1145extern AVCodec dvvideo_decoder;
1146extern AVCodec dvaudio_decoder;
bc8d1857
FB
1147extern AVCodec wmav1_decoder;
1148extern AVCodec wmav2_decoder;
4e66ab3b 1149extern AVCodec mjpeg_decoder;
b135d9fb 1150extern AVCodec mjpegb_decoder;
4b1f4f23 1151extern AVCodec mp2_decoder;
a96b68b7 1152extern AVCodec mp3_decoder;
3f95e843
FR
1153extern AVCodec mace3_decoder;
1154extern AVCodec mace6_decoder;
11f18faf 1155extern AVCodec huffyuv_decoder;
3aca208a 1156extern AVCodec oggvorbis_decoder;
f70f7c6d 1157extern AVCodec cyuv_decoder;
de6d9b64 1158
a96b68b7
FB
1159/* pcm codecs */
1160#define PCM_CODEC(id, name) \
1161extern AVCodec name ## _decoder; \
f11d3f23 1162extern AVCodec name ## _encoder
a96b68b7
FB
1163
1164PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1165PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1166PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1167PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1168PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1169PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1170PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1171PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1172
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1173/* adpcm codecs */
1174
1175PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1176PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1177PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1178
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1179#undef PCM_CODEC
1180
1181/* dummy raw video codec */
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1182extern AVCodec rawvideo_codec;
1183
1184/* the following codecs use external GPL libs */
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1185extern AVCodec ac3_decoder;
1186
1187/* resample.c */
1188
1189struct ReSampleContext;
1190
1191typedef struct ReSampleContext ReSampleContext;
1192
1193ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1194 int output_rate, int input_rate);
1195int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1196void audio_resample_close(ReSampleContext *s);
1197
1198/* YUV420 format is assumed ! */
1199
1200struct ImgReSampleContext;
1201
1202typedef struct ImgReSampleContext ImgReSampleContext;
1203
1204ImgReSampleContext *img_resample_init(int output_width, int output_height,
1205 int input_width, int input_height);
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1206
1207ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1208 int iwidth, int iheight,
1209 int topBand, int bottomBand,
1210 int leftBand, int rightBand);
1211
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1212void img_resample(ImgReSampleContext *s,
1213 AVPicture *output, AVPicture *input);
1214
1215void img_resample_close(ImgReSampleContext *s);
1216
0c1a9eda 1217int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2d1a4094 1218 int pix_fmt, int width, int height);
219b06c6 1219int avpicture_get_size(int pix_fmt, int width, int height);
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1220void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1221const char *avcodec_get_pix_fmt_name(int pix_fmt);
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FB
1222
1223/* convert among pixel formats */
1224int img_convert(AVPicture *dst, int dst_pix_fmt,
1225 AVPicture *src, int pix_fmt,
1226 int width, int height);
1227
1228/* deinterlace a picture */
1229int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
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FB
1230 int pix_fmt, int width, int height);
1231
1232/* external high level API */
1233
1234extern AVCodec *first_avcodec;
1235
156e5023 1236/* returns LIBAVCODEC_VERSION_INT constant */
51a49663 1237unsigned avcodec_version(void);
8bceb6af 1238/* returns LIBAVCODEC_BUILD constant */
51a49663 1239unsigned avcodec_build(void);
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1240void avcodec_init(void);
1241
1242void register_avcodec(AVCodec *format);
1243AVCodec *avcodec_find_encoder(enum CodecID id);
98f3b098 1244AVCodec *avcodec_find_encoder_by_name(const char *name);
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FB
1245AVCodec *avcodec_find_decoder(enum CodecID id);
1246AVCodec *avcodec_find_decoder_by_name(const char *name);
1247void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1248
1e491e29 1249void avcodec_get_context_defaults(AVCodecContext *s);
7ffbb60e 1250AVCodecContext *avcodec_alloc_context(void);
492cd3a9 1251AVFrame *avcodec_alloc_frame(void);
1e491e29 1252
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1253int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1254void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1e491e29 1255
de6d9b64 1256int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
0c1a9eda 1257int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
de6d9b64 1258 int *frame_size_ptr,
0c1a9eda 1259 uint8_t *buf, int buf_size);
492cd3a9 1260int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
de6d9b64 1261 int *got_picture_ptr,
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1262 uint8_t *buf, int buf_size);
1263int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
917e06c8 1264 int *data_size_ptr,
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1265 uint8_t *buf, int buf_size);
1266int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
de6d9b64 1267 const short *samples);
0c1a9eda 1268int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
492cd3a9 1269 const AVFrame *pict);
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1270
1271int avcodec_close(AVCodecContext *avctx);
1272
1273void avcodec_register_all(void);
a96b68b7 1274
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1275void avcodec_flush_buffers(AVCodecContext *avctx);
1276
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1277/* misc usefull functions */
1278/**
1279 * reduce a fraction.
1280 * this is usefull for framerate calculations
1281 * @param max the maximum allowed for dst_nom & dst_den
1282 * @return 1 if exact, 0 otherwise
1283 */
1284int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1285
1286/**
1287 * rescale a 64bit integer.
1288 * a simple a*b/c isnt possible as it can overflow
1289 */
1290int64_t av_rescale(int64_t a, int b, int c);
628d601b 1291
628d601b 1292
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1293/**
1294 * Interface for 0.5.0 version
1295 *
1296 * do not even think about it's usage for this moment
1297 */
1298
1299typedef struct {
64863965 1300 /// compressed size used from given memory buffer
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1301 int size;
1302 /// I/P/B frame type
1303 int frame_type;
1304} avc_enc_result_t;
1305
1306/**
1307 * Commands
1308 * order can't be changed - once it was defined
1309 */
1310typedef enum {
1311 // general commands
1312 AVC_OPEN_BY_NAME = 0xACA000,
1313 AVC_OPEN_BY_CODEC_ID,
1314 AVC_OPEN_BY_FOURCC,
1315 AVC_CLOSE,
1316
1317 AVC_FLUSH,
1318 // pin - struct { uint8_t* src, uint_t src_size }
1319 // pout - struct { AVPicture* img, consumed_bytes,
1320 AVC_DECODE,
1321 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1322 // pout - uint_t used_from_dest_size
1323 AVC_ENCODE,
1324
1325 // query/get video commands
1326 AVC_GET_VERSION = 0xACB000,
1327 AVC_GET_WIDTH,
1328 AVC_GET_HEIGHT,
1329 AVC_GET_DELAY,
1330 AVC_GET_QUANT_TABLE,
1331 // ...
1332
1333 // query/get audio commands
1334 AVC_GET_FRAME_SIZE = 0xABC000,
1335
1336 // maybe define some simple structure which
1337 // might be passed to the user - but they can't
1338 // contain any codec specific parts and these
1339 // calls are usualy necessary only few times
1340
1341 // set video commands
1342 AVC_SET_WIDTH = 0xACD000,
1343 AVC_SET_HEIGHT,
1344
1345 // set video encoding commands
1346 AVC_SET_FRAME_RATE = 0xACD800,
1347 AVC_SET_QUALITY,
1348 AVC_SET_HURRY_UP,
1349
1350 // set audio commands
1351 AVC_SET_SAMPLE_RATE = 0xACE000,
1352 AVC_SET_CHANNELS,
1353
1354} avc_cmd_t;
1355
1356/**
1357 * \param handle allocated private structure by libavcodec
1358 * for initialization pass NULL - will be returned pout
1359 * user is supposed to know nothing about its structure
1360 * \param cmd type of operation to be performed
1361 * \param pint input parameter
1362 * \param pout output parameter
1363 *
1364 * \returns command status - eventually for query command it might return
1365 * integer resulting value
1366 */
1367int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1368
544eb99c 1369/* memory */
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1370void *av_malloc(unsigned int size);
1371void *av_mallocz(unsigned int size);
8e1e6f31 1372void *av_realloc(void *ptr, unsigned int size);
544eb99c 1373void av_free(void *ptr);
8e1e6f31 1374char *av_strdup(const char *s);
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FB
1375void __av_freep(void **ptr);
1376#define av_freep(p) __av_freep((void **)(p))
97d96aaa 1377void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
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ZK
1378/* for static data only */
1379/* call av_free_static to release all staticaly allocated tables */
628d601b 1380void av_free_static(void);
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ZK
1381void *__av_mallocz_static(void** location, unsigned int size);
1382#define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
544eb99c 1383
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1384#ifdef __cplusplus
1385}
1386#endif
1387
a96b68b7 1388#endif /* AVCODEC_H */