* cleanup
[libav.git] / libavcodec / mpegvideo.h
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1/*
2 * Generic DCT based hybrid video encoder
3 * Copyright (c) 2000,2001 Gerard Lantau.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20/* Macros for picture code type. */
21#define I_TYPE 1
22#define P_TYPE 2
23#define B_TYPE 3
cc9ba006 24#define S_TYPE 4 //S(GMC)-VOP MPEG4
de6d9b64 25
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26#define FRAME_SKIPED 100 // return value for header parsers if frame is not coded
27
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28enum OutputFormat {
29 FMT_MPEG1,
30 FMT_H263,
9dbcbd92 31 FMT_MJPEG,
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32};
33
34#define MPEG_BUF_SIZE (16 * 1024)
35
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36#define QMAT_SHIFT_MMX 19
37#define QMAT_SHIFT 25
38
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39#define MAX_FCODE 7
40#define MAX_MV 2048
9dbcbd92 41#define REORDER_BUFFER_SIZE (FF_MAX_B_FRAMES+2)
45870f57 42
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43typedef struct Predictor{
44 double coeff;
45 double count;
46 double decay;
47} Predictor;
48
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49typedef struct RateControlEntry{
50 int pict_type;
51 int qscale;
52 int mv_bits;
53 int i_tex_bits;
54 int p_tex_bits;
55 int misc_bits;
56 uint64_t expected_bits;
57 int new_pict_type;
58 float new_qscale;
59}RateControlEntry;
60
61typedef struct RateControlContext{
62 FILE *stats_file;
63 int num_entries;
64 RateControlEntry *entry;
65}RateControlContext;
66
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67typedef struct ReorderBuffer{
68 UINT8 *picture[3];
69 int pict_type;
70 int qscale;
71 int force_type;
72 int picture_number;
73 int picture_in_gop_number;
74} ReorderBuffer;
75
de6d9b64 76typedef struct MpegEncContext {
58f26ba9 77 struct AVCodecContext *avctx;
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78 /* the following parameters must be initialized before encoding */
79 int width, height; /* picture size. must be a multiple of 16 */
80 int gop_size;
81 int frame_rate; /* number of frames per second */
82 int intra_only; /* if true, only intra pictures are generated */
83 int bit_rate; /* wanted bit rate */
9cdd6a24 84 int bit_rate_tolerance; /* amount of +- bits (>0)*/
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85 enum OutputFormat out_format; /* output format */
86 int h263_plus; /* h263 plus headers */
87 int h263_rv10; /* use RV10 variation for H263 */
58f26ba9 88 int h263_pred; /* use mpeg4/h263 ac/dc predictions */
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89 int h263_msmpeg4; /* generate MSMPEG4 compatible stream */
90 int h263_intel; /* use I263 intel h263 header */
91 int fixed_qscale; /* fixed qscale if non zero */
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92 float qcompress; /* amount of qscale change between easy & hard scenes (0.0-1.0) */
93 float qblur; /* amount of qscale smoothing over time (0.0-1.0) */
94 int qmin; /* min qscale */
95 int qmax; /* max qscale */
96 int max_qdiff; /* max qscale difference between frames */
3bb4e23a 97 int encoding; /* true if we are encoding (vs decoding) */
ba6802de 98 int flags; /* AVCodecContext.flags (HQ, MV4, ...) */
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99 int force_input_type;/* 0= no force, otherwise I_TYPE, P_TYPE, ... */
100 int max_b_frames; /* max number of b-frames for encoding */
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101 float b_quant_factor;/* qscale factor between ips and b frames */
102 int rc_strategy;
103 int b_frame_strategy;
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104 /* the following fields are managed internally by the encoder */
105
106 /* bit output */
107 PutBitContext pb;
108
109 /* sequence parameters */
110 int context_initialized;
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111 int input_picture_number;
112 int input_picture_in_gop_number; /* 0-> first pic in gop, ... */
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113 int picture_number;
114 int fake_picture_number; /* picture number at the bitstream frame rate */
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115 int gop_picture_number; /* index of the first picture of a GOP based on fake_pic_num & mpeg1 specific */
116 int picture_in_gop_number; /* 0-> first pic in gop, ... */
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117 int b_frames_since_non_b; /* used for encoding, relative to not yet reordered input */
118 int mb_width, mb_height; /* number of MBs horizontally & vertically */
e03c341e 119 int mb_num; /* number of MBs of a picture */
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120 int linesize; /* line size, in bytes, may be different from width */
121 UINT8 *new_picture[3]; /* picture to be compressed */
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122 UINT8 *picture_buffer[REORDER_BUFFER_SIZE][3]; /* internal buffers used for reordering of input pictures */
123 int picture_buffer_index;
124 ReorderBuffer coded_order[REORDER_BUFFER_SIZE];
125 UINT8 *last_picture[3]; /* previous picture */
de6d9b64 126 UINT8 *last_picture_base[3]; /* real start of the picture */
9dbcbd92 127 UINT8 *next_picture[3]; /* previous picture (for bidir pred) */
de6d9b64 128 UINT8 *next_picture_base[3]; /* real start of the picture */
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129 UINT8 *aux_picture[3]; /* aux picture (for B frames only) */
130 UINT8 *aux_picture_base[3]; /* real start of the picture */
131 UINT8 *current_picture[3]; /* buffer to store the decompressed current picture */
1c2a8c7f 132 int num_available_buffers; /* is 0 at the start & after seeking, after the first I frame its 1 after next I/P 2 */
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133 int last_dc[3]; /* last DC values for MPEG1 */
134 INT16 *dc_val[3]; /* used for mpeg4 DC prediction, all 3 arrays must be continuous */
de6d9b64 135 int y_dc_scale, c_dc_scale;
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136 UINT8 *coded_block; /* used for coded block pattern prediction (msmpeg4v3, wmv1)*/
137 INT16 (*ac_val[3])[16]; /* used for for mpeg4 AC prediction, all 3 arrays must be continuous */
de6d9b64 138 int ac_pred;
3bb4e23a 139 int mb_skiped; /* MUST BE SET only during DECODING */
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140 UINT8 *mbskip_table; /* used to avoid copy if macroblock skipped (for black regions for example)
141 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
142 UINT8 *mbintra_table; /* used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding */
de6d9b64 143
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144 int input_qscale; /* qscale prior to reordering of frames */
145 int input_pict_type; /* pict_type prior to reordering of frames */
146 int force_type; /* 0= no force, otherwise I_TYPE, P_TYPE, ... */
147 int qscale; /* QP */
8b4c7dbc 148 int last_non_b_qscale; /* QP of last non b frame used for b frame qscale*/
9dbcbd92 149 int pict_type; /* I_TYPE, P_TYPE, B_TYPE, ... */
8b4c7dbc 150 int last_non_b_pict_type; /* used for mpeg4 gmc b-frames & ratecontrol */
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151 int frame_rate_index;
152 /* motion compensation */
153 int unrestricted_mv;
154 int h263_long_vectors; /* use horrible h263v1 long vector mode */
155
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156 int f_code; /* forward MV resolution */
157 int b_code; /* backward MV resolution for B Frames (mpeg4) */
158 INT16 (*motion_val)[2]; /* used for MV prediction (4MV per MB) */
159 INT16 (*p_mv_table)[2]; /* MV table (1MV per MB) p-frame encoding */
160 INT16 (*last_p_mv_table)[2]; /* MV table (1MV per MB) p-frame encoding */
161 INT16 (*b_forw_mv_table)[2]; /* MV table (1MV per MB) forward mode b-frame encoding */
162 INT16 (*b_back_mv_table)[2]; /* MV table (1MV per MB) backward mode b-frame encoding */
163 INT16 (*b_bidir_forw_mv_table)[2]; /* MV table (1MV per MB) bidir mode b-frame encoding */
164 INT16 (*b_bidir_back_mv_table)[2]; /* MV table (1MV per MB) bidir mode b-frame encoding */
165 INT16 (*b_direct_forw_mv_table)[2];/* MV table (1MV per MB) direct mode b-frame encoding */
166 INT16 (*b_direct_back_mv_table)[2];/* MV table (1MV per MB) direct mode b-frame encoding */
167 INT16 (*b_direct_mv_table)[2]; /* MV table (1MV per MB) direct mode b-frame encoding */
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168 int me_method; /* ME algorithm */
169 uint8_t *me_scratchpad; /* data area for the me algo, so that the ME doesnt need to malloc/free */
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170 int mv_dir;
171#define MV_DIR_BACKWARD 1
172#define MV_DIR_FORWARD 2
6f91bcd1 173#define MV_DIRECT 4 // bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
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174 int mv_type;
175#define MV_TYPE_16X16 0 /* 1 vector for the whole mb */
45870f57 176#define MV_TYPE_8X8 1 /* 4 vectors (h263, mpeg4 4MV) */
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177#define MV_TYPE_16X8 2 /* 2 vectors, one per 16x8 block */
178#define MV_TYPE_FIELD 3 /* 2 vectors, one per field */
179#define MV_TYPE_DMV 4 /* 2 vectors, special mpeg2 Dual Prime Vectors */
180 /* motion vectors for a macroblock
181 first coordinate : 0 = forward 1 = backward
182 second " : depend on type
183 third " : 0 = x, 1 = y
184 */
185 int mv[2][4][2];
186 int field_select[2][2];
9dbcbd92 187 int last_mv[2][2][2]; /* last MV, used for MV prediction in MPEG1 & B-frame MPEG4 */
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188 UINT16 (*mv_penalty)[MAX_MV*2+1]; /* amount of bits needed to encode a MV, used for ME */
189 UINT8 *fcode_tab; /* smallest fcode needed for each MV */
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190
191 int has_b_frames;
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192 int no_rounding; /* apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
193 for b-frames rounding mode is allways 0 */
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194
195 /* macroblock layer */
196 int mb_x, mb_y;
197 int mb_incr;
198 int mb_intra;
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199 UINT16 *mb_var; /* Table for MB variances */
200 UINT8 *mb_type; /* Table for MB type */
201#define MB_TYPE_INTRA 0x01
202#define MB_TYPE_INTER 0x02
203#define MB_TYPE_INTER4V 0x04
204#define MB_TYPE_SKIPED 0x08
205#define MB_TYPE_DIRECT 0x10
206#define MB_TYPE_FORWARD 0x20
9dbcbd92 207#define MB_TYPE_BACKWARD 0x40
ba6802de 208#define MB_TYPE_BIDIR 0x80
4278e7a6 209
9dbcbd92 210 int block_index[6]; /* index to current MB in block based arrays with edges*/
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211 int block_wrap[6];
212
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213 /* matrix transmitted in the bitstream */
214 UINT16 intra_matrix[64];
215 UINT16 chroma_intra_matrix[64];
216 UINT16 non_intra_matrix[64];
217 UINT16 chroma_non_intra_matrix[64];
218 /* precomputed matrix (combine qscale and DCT renorm) */
219 int q_intra_matrix[64];
220 int q_non_intra_matrix[64];
2f349de2 221 /* identical to the above but for MMX & these are not permutated */
8b4c7dbc 222 UINT16 __align8 q_intra_matrix16[64];
2f349de2 223 UINT16 __align8 q_non_intra_matrix16[64];
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224 int block_last_index[6]; /* last non zero coefficient in block */
225
226 void *opaque; /* private data for the user */
227
228 /* bit rate control */
9dbcbd92 229 int I_frame_bits; //FIXME used in mpeg12 ...
e03c341e 230 int avg_mb_var; /* average MB variance for current frame */
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231 int mc_mb_var; /* motion compensated MB variance for current frame */
232 int last_non_b_mc_mb_var;/* motion compensated MB variance for last non b frame */
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233 INT64 wanted_bits;
234 INT64 total_bits;
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235 int frame_bits; /* bits used for the current frame */
236 int pb_frame_bits; /* bits of the last b...bp group */
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237 Predictor i_pred;
238 Predictor p_pred;
239 double qsum; /* sum of qscales */
240 double qcount; /* count of qscales */
241 double short_term_qsum; /* sum of recent qscales */
242 double short_term_qcount; /* count of recent qscales */
8b4c7dbc 243 RateControlContext rc_context;
9cdd6a24 244
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245 /* statistics, used for 2-pass encoding */
246 int mv_bits;
247 int header_bits;
248 int i_tex_bits;
249 int p_tex_bits;
250 int i_count;
251 int p_count;
252 int skip_count;
253 int misc_bits; // cbp, mb_type
254 int last_bits; //temp var used for calculating the above vars
255
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256 /* H.263 specific */
257 int gob_number;
644d98a4 258 int gob_index;
102d3908 259 int first_gob_line;
d140623f 260
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261 /* H.263+ specific */
262 int umvplus;
263 int umvplus_dec;
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264 int h263_aic; /* Advanded INTRA Coding (AIC) */
265 int h263_aic_dir; /* AIC direction: 0 = left, 1 = top */
544286b3 266
de6d9b64 267 /* mpeg4 specific */
6f91bcd1 268 int time_increment_resolution;
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269 int time_increment_bits; /* number of bits to represent the fractional part of time */
270 int last_time_base;
271 int time_base; /* time in seconds of last I,P,S Frame */
272 int64_t time; /* time of current frame */
273 int64_t last_non_b_time;
274 uint16_t pp_time; /* time distance between the last 2 p,s,i frames */
275 uint16_t bp_time; /* time distance between the last b and p,s,i frame */
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276 int shape;
277 int vol_sprite_usage;
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278 int sprite_width;
279 int sprite_height;
280 int sprite_left;
281 int sprite_top;
282 int sprite_brightness_change;
73c8e514 283 int num_sprite_warping_points;
44eb4951 284 int real_sprite_warping_points;
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285 int sprite_offset[2][2];
286 int sprite_delta[2][2][2];
287 int sprite_shift[2][2];
288 int mcsel;
1a565432 289 int quant_precision;
9dbcbd92 290 int quarter_sample; /* 1->qpel, 0->half pel ME/MC */
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291 int scalability;
292 int new_pred;
293 int reduced_res_vop;
294 int aspect_ratio_info;
295 int sprite_warping_accuracy;
296 int low_latency_sprite;
297 int data_partioning;
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298 int resync_marker;
299 int resync_x_pos;
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300 int low_delay; /* no reordering needed / has no b-frames */
301 int vo_type;
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302
303 /* divx specific, used to workaround (many) bugs in divx5 */
304 int divx_version;
305 int divx_build;
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306#define BITSTREAM_BUFFER_SIZE 1024*256
307 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
308 int bitstream_buffer_size;
309
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310 /* RV10 specific */
311 int rv10_version; /* RV10 version: 0 or 3 */
312 int rv10_first_dc_coded[3];
313
314 /* MJPEG specific */
315 struct MJpegContext *mjpeg_ctx;
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316 int mjpeg_vsample[3]; /* vertical sampling factors, default = {2, 1, 1} */
317 int mjpeg_hsample[3]; /* horizontal sampling factors, default = {2, 1, 1} */
318 int mjpeg_write_tables; /* do we want to have quantisation- and
319 huffmantables in the jpeg file ? */
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320
321 /* MSMPEG4 specific */
322 int mv_table_index;
323 int rl_table_index;
324 int rl_chroma_table_index;
325 int dc_table_index;
326 int use_skip_mb_code;
327 int slice_height; /* in macroblocks */
49092244 328 int first_slice_line; /* used in mpeg4 too to handle resync markers */
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329 int flipflop_rounding;
330 int bitrate;
84afee34 331 int msmpeg4_version; /* 1=mp41, 2=mp42, 3=mp43/divx3 */
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332 /* decompression specific */
333 GetBitContext gb;
334
335 /* MPEG2 specific - I wish I had not to support this mess. */
336 int progressive_sequence;
337 int mpeg_f_code[2][2];
338 int picture_structure;
339/* picture type */
340#define PICT_TOP_FIELD 1
341#define PICT_BOTTOM_FIELD 2
342#define PICT_FRAME 3
343
344 int intra_dc_precision;
345 int frame_pred_frame_dct;
346 int top_field_first;
347 int concealment_motion_vectors;
348 int q_scale_type;
349 int intra_vlc_format;
350 int alternate_scan;
351 int repeat_first_field;
352 int chroma_420_type;
353 int progressive_frame;
354 int mpeg2;
355 int full_pel[2];
356 int interlaced_dct;
357 int last_qscale;
358 int first_slice;
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359
360 /* RTP specific */
81401c1f 361 /* These are explained on avcodec.h */
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362 int rtp_mode;
363 int rtp_payload_size;
81401c1f 364 void (*rtp_callback)(void *data, int size, int packet_number);
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365 UINT8 *ptr_lastgob;
366 UINT8 *ptr_last_mb_line;
367 UINT32 mb_line_avgsize;
368
ba6802de 369 DCTELEM (*block)[64]; /* points to one of the following blocks */
91029be7 370 DCTELEM blocks[2][6][64] __align8; // for HQ mode we need to keep the best block
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371 void (*dct_unquantize_mpeg1)(struct MpegEncContext *s,
372 DCTELEM *block, int n, int qscale);
373 void (*dct_unquantize_mpeg2)(struct MpegEncContext *s,
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374 DCTELEM *block, int n, int qscale);
375 void (*dct_unquantize_h263)(struct MpegEncContext *s,
376 DCTELEM *block, int n, int qscale);
377 void (*dct_unquantize)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
21af69f7 378 DCTELEM *block, int n, int qscale);
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379} MpegEncContext;
380
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381int MPV_common_init(MpegEncContext *s);
382void MPV_common_end(MpegEncContext *s);
383void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
384void MPV_frame_start(MpegEncContext *s);
385void MPV_frame_end(MpegEncContext *s);
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386#ifdef HAVE_MMX
387void MPV_common_init_mmx(MpegEncContext *s);
388#endif
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389
390/* motion_est.c */
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391void ff_estimate_p_frame_motion(MpegEncContext * s,
392 int mb_x, int mb_y);
393void ff_estimate_b_frame_motion(MpegEncContext * s,
394 int mb_x, int mb_y);
395int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
396void ff_fix_long_p_mvs(MpegEncContext * s);
397void ff_fix_long_b_mvs(MpegEncContext * s, int16_t (*mv_table)[2], int f_code, int type);
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398
399/* mpeg12.c */
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400extern INT16 default_intra_matrix[64];
401extern INT16 default_non_intra_matrix[64];
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402
403void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
404void mpeg1_encode_mb(MpegEncContext *s,
405 DCTELEM block[6][64],
406 int motion_x, int motion_y);
11ce8834 407void mpeg1_encode_init(MpegEncContext *s);
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408
409/* h263enc.c */
410
411/* run length table */
412#define MAX_RUN 64
413#define MAX_LEVEL 64
414
415typedef struct RLTable {
416 int n; /* number of entries of table_vlc minus 1 */
417 int last; /* number of values for last = 0 */
418 const UINT16 (*table_vlc)[2];
419 const INT8 *table_run;
420 const INT8 *table_level;
421 UINT8 *index_run[2]; /* encoding only */
422 INT8 *max_level[2]; /* encoding & decoding */
423 INT8 *max_run[2]; /* encoding & decoding */
424 VLC vlc; /* decoding only */
425} RLTable;
426
427void init_rl(RLTable *rl);
428void init_vlc_rl(RLTable *rl);
429
3232bc88 430static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
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431{
432 int index;
433 index = rl->index_run[last][run];
434 if (index >= rl->n)
435 return rl->n;
436 if (level > rl->max_level[last][run])
437 return rl->n;
438 return index + level - 1;
439}
440
441void h263_encode_mb(MpegEncContext *s,
442 DCTELEM block[6][64],
443 int motion_x, int motion_y);
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444void mpeg4_encode_mb(MpegEncContext *s,
445 DCTELEM block[6][64],
446 int motion_x, int motion_y);
de6d9b64 447void h263_encode_picture_header(MpegEncContext *s, int picture_number);
644d98a4 448int h263_encode_gob_header(MpegEncContext * s, int mb_line);
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449void h263_dc_scale(MpegEncContext *s);
450INT16 *h263_pred_motion(MpegEncContext * s, int block,
451 int *px, int *py);
452void mpeg4_pred_ac(MpegEncContext * s, INT16 *block, int n,
453 int dir);
91029be7 454void ff_set_mpeg4_time(MpegEncContext * s, int picture_number);
de6d9b64 455void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
45870f57 456void h263_encode_init(MpegEncContext *s);
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457
458void h263_decode_init_vlc(MpegEncContext *s);
459int h263_decode_picture_header(MpegEncContext *s);
644d98a4 460int h263_decode_gob_header(MpegEncContext *s);
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461int mpeg4_decode_picture_header(MpegEncContext * s);
462int intel_h263_decode_picture_header(MpegEncContext *s);
463int h263_decode_mb(MpegEncContext *s,
464 DCTELEM block[6][64]);
465int h263_get_picture_format(int width, int height);
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466
467/* rv10.c */
468void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
469int rv_decode_dc(MpegEncContext *s, int n);
470
471/* msmpeg4.c */
472void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
ae40484c 473void msmpeg4_encode_ext_header(MpegEncContext * s);
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474void msmpeg4_encode_mb(MpegEncContext * s,
475 DCTELEM block[6][64],
476 int motion_x, int motion_y);
477void msmpeg4_dc_scale(MpegEncContext * s);
478int msmpeg4_decode_picture_header(MpegEncContext * s);
ae40484c 479int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
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480int msmpeg4_decode_mb(MpegEncContext *s,
481 DCTELEM block[6][64]);
482int msmpeg4_decode_init_vlc(MpegEncContext *s);
483
484/* mjpegenc.c */
485
486int mjpeg_init(MpegEncContext *s);
487void mjpeg_close(MpegEncContext *s);
488void mjpeg_encode_mb(MpegEncContext *s,
489 DCTELEM block[6][64]);
490void mjpeg_picture_header(MpegEncContext *s);
491void mjpeg_picture_trailer(MpegEncContext *s);
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492
493/* rate control */
494int ff_rate_control_init(MpegEncContext *s);
495int ff_rate_estimate_qscale(MpegEncContext *s);
496int ff_rate_estimate_qscale_pass2(MpegEncContext *s);
497void ff_write_pass1_stats(MpegEncContext *s);
498void ff_rate_control_uninit(MpegEncContext *s);
499
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502