Statistics
| Branch: | Revision:

ffmpeg / libavcodec / mpegvideo.h @ cbcd6c8c

History | View | Annotate | Download (37.6 KB)

1
/*
2
 * Generic DCT based hybrid video encoder
3
 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
4
 * Copyright (c) 2002-2004 Michael Niedermayer
5
 *
6
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
13
 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * Lesser General Public License for more details.
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
19
 * License along with FFmpeg; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22

    
23
/**
24
 * @file mpegvideo.h
25
 * mpegvideo header.
26
 */
27

    
28
#ifndef FFMPEG_MPEGVIDEO_H
29
#define FFMPEG_MPEGVIDEO_H
30

    
31
#include "dsputil.h"
32
#include "bitstream.h"
33
#include "ratecontrol.h"
34
#include "parser.h"
35
#include "mpeg12data.h"
36
#include "rl.h"
37

    
38
#define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
39

    
40
enum OutputFormat {
41
    FMT_MPEG1,
42
    FMT_H261,
43
    FMT_H263,
44
    FMT_MJPEG,
45
    FMT_H264,
46
};
47

    
48
#define MPEG_BUF_SIZE (16 * 1024)
49

    
50
#define QMAT_SHIFT_MMX 16
51
#define QMAT_SHIFT 22
52

    
53
#define MAX_FCODE 7
54
#define MAX_MV 2048
55

    
56
#define MAX_THREADS 8
57

    
58
#define MAX_PICTURE_COUNT 32
59

    
60
#define ME_MAP_SIZE 64
61
#define ME_MAP_SHIFT 3
62
#define ME_MAP_MV_BITS 11
63

    
64
#define I_TYPE FF_I_TYPE  ///< Intra
65
#define P_TYPE FF_P_TYPE  ///< Predicted
66
#define B_TYPE FF_B_TYPE  ///< Bi-dir predicted
67
#define S_TYPE FF_S_TYPE  ///< S(GMC)-VOP MPEG4
68
#define SI_TYPE FF_SI_TYPE  ///< Switching Intra
69
#define SP_TYPE FF_SP_TYPE  ///< Switching Predicted
70

    
71
#define MAX_MB_BYTES (30*16*16*3/8 + 120)
72

    
73
#define INPLACE_OFFSET 16
74

    
75
/* Start codes. */
76
#define SEQ_END_CODE            0x000001b7
77
#define SEQ_START_CODE          0x000001b3
78
#define GOP_START_CODE          0x000001b8
79
#define PICTURE_START_CODE      0x00000100
80
#define SLICE_MIN_START_CODE    0x00000101
81
#define SLICE_MAX_START_CODE    0x000001af
82
#define EXT_START_CODE          0x000001b5
83
#define USER_START_CODE         0x000001b2
84

    
85
/**
86
 * Picture.
87
 */
88
typedef struct Picture{
89
    FF_COMMON_FRAME
90

    
91
    /**
92
     * halfpel luma planes.
93
     */
94
    uint8_t *interpolated[3];
95
    int16_t (*motion_val_base[2])[2];
96
    uint32_t *mb_type_base;
97
#define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
98
#define IS_INTRA4x4(a)   ((a)&MB_TYPE_INTRA4x4)
99
#define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
100
#define IS_PCM(a)        ((a)&MB_TYPE_INTRA_PCM)
101
#define IS_INTRA(a)      ((a)&7)
102
#define IS_INTER(a)      ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
103
#define IS_SKIP(a)       ((a)&MB_TYPE_SKIP)
104
#define IS_INTRA_PCM(a)  ((a)&MB_TYPE_INTRA_PCM)
105
#define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
106
#define IS_DIRECT(a)     ((a)&MB_TYPE_DIRECT2)
107
#define IS_GMC(a)        ((a)&MB_TYPE_GMC)
108
#define IS_16X16(a)      ((a)&MB_TYPE_16x16)
109
#define IS_16X8(a)       ((a)&MB_TYPE_16x8)
110
#define IS_8X16(a)       ((a)&MB_TYPE_8x16)
111
#define IS_8X8(a)        ((a)&MB_TYPE_8x8)
112
#define IS_SUB_8X8(a)    ((a)&MB_TYPE_16x16) //note reused
113
#define IS_SUB_8X4(a)    ((a)&MB_TYPE_16x8)  //note reused
114
#define IS_SUB_4X8(a)    ((a)&MB_TYPE_8x16)  //note reused
115
#define IS_SUB_4X4(a)    ((a)&MB_TYPE_8x8)   //note reused
116
#define IS_ACPRED(a)     ((a)&MB_TYPE_ACPRED)
117
#define IS_QUANT(a)      ((a)&MB_TYPE_QUANT)
118
#define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
119
#define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0|MB_TYPE_P1L0)<<(2*(list)))) ///< does this mb use listX, note does not work if subMBs
120
#define HAS_CBP(a)        ((a)&MB_TYPE_CBP)
121

    
122
    int field_poc[2];           ///< h264 top/bottom POC
123
    int poc;                    ///< h264 frame POC
124
    int frame_num;              ///< h264 frame_num (raw frame_num from slice header)
125
    int pic_id;                 /**< h264 pic_num (short -> no wrap version of pic_num,
126
                                     pic_num & max_pic_num; long -> long_pic_num) */
127
    int long_ref;               ///< 1->long term reference 0->short term reference
128
    int ref_poc[2][16];         ///< h264 POCs of the frames used as reference
129
    int ref_count[2];           ///< number of entries in ref_poc
130

    
131
    int mb_var_sum;             ///< sum of MB variance for current frame
132
    int mc_mb_var_sum;          ///< motion compensated MB variance for current frame
133
    uint16_t *mb_var;           ///< Table for MB variances
134
    uint16_t *mc_mb_var;        ///< Table for motion compensated MB variances
135
    uint8_t *mb_mean;           ///< Table for MB luminance
136
    int32_t *mb_cmp_score;      ///< Table for MB cmp scores, for mb decision FIXME remove
137
    int b_frame_score;          /* */
138
} Picture;
139

    
140
struct MpegEncContext;
141

    
142
/**
143
 * Motion estimation context.
144
 */
145
typedef struct MotionEstContext{
146
    AVCodecContext *avctx;
147
    int skip;                          ///< set if ME is skipped for the current MB
148
    int co_located_mv[4][2];           ///< mv from last P-frame for direct mode ME
149
    int direct_basis_mv[4][2];
150
    uint8_t *scratchpad;               ///< data area for the ME algo, so that the ME does not need to malloc/free
151
    uint8_t *best_mb;
152
    uint8_t *temp_mb[2];
153
    uint8_t *temp;
154
    int best_bits;
155
    uint32_t *map;                     ///< map to avoid duplicate evaluations
156
    uint32_t *score_map;               ///< map to store the scores
157
    int map_generation;
158
    int pre_penalty_factor;
159
    int penalty_factor;                /*!< an estimate of the bits required to
160
                                        code a given mv value, e.g. (1,0) takes
161
                                        more bits than (0,0). We have to
162
                                        estimate whether any reduction in
163
                                        residual is worth the extra bits. */
164
    int sub_penalty_factor;
165
    int mb_penalty_factor;
166
    int flags;
167
    int sub_flags;
168
    int mb_flags;
169
    int pre_pass;                      ///< = 1 for the pre pass
170
    int dia_size;
171
    int xmin;
172
    int xmax;
173
    int ymin;
174
    int ymax;
175
    int pred_x;
176
    int pred_y;
177
    uint8_t *src[4][4];
178
    uint8_t *ref[4][4];
179
    int stride;
180
    int uvstride;
181
    /* temp variables for picture complexity calculation */
182
    int mc_mb_var_sum_temp;
183
    int mb_var_sum_temp;
184
    int scene_change_score;
185
/*    cmp, chroma_cmp;*/
186
    op_pixels_func (*hpel_put)[4];
187
    op_pixels_func (*hpel_avg)[4];
188
    qpel_mc_func (*qpel_put)[16];
189
    qpel_mc_func (*qpel_avg)[16];
190
    uint8_t (*mv_penalty)[MAX_MV*2+1];  ///< amount of bits needed to encode a MV
191
    uint8_t *current_mv_penalty;
192
    int (*sub_motion_search)(struct MpegEncContext * s,
193
                                  int *mx_ptr, int *my_ptr, int dmin,
194
                                  int src_index, int ref_index,
195
                                  int size, int h);
196
}MotionEstContext;
197

    
198
/**
199
 * MpegEncContext.
200
 */
201
typedef struct MpegEncContext {
202
    struct AVCodecContext *avctx;
203
    /* the following parameters must be initialized before encoding */
204
    int width, height;///< picture size. must be a multiple of 16
205
    int gop_size;
206
    int intra_only;   ///< if true, only intra pictures are generated
207
    int bit_rate;     ///< wanted bit rate
208
    enum OutputFormat out_format; ///< output format
209
    int h263_pred;    ///< use mpeg4/h263 ac/dc predictions
210

    
211
/* the following codec id fields are deprecated in favor of codec_id */
212
    int h263_plus;    ///< h263 plus headers
213
    int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
214
    int h263_flv;     ///< use flv h263 header
215

    
216
    enum CodecID codec_id;     /* see CODEC_ID_xxx */
217
    int fixed_qscale; ///< fixed qscale if non zero
218
    int encoding;     ///< true if we are encoding (vs decoding)
219
    int flags;        ///< AVCodecContext.flags (HQ, MV4, ...)
220
    int flags2;       ///< AVCodecContext.flags2
221
    int max_b_frames; ///< max number of b-frames for encoding
222
    int luma_elim_threshold;
223
    int chroma_elim_threshold;
224
    int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
225
    int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically
226
    int codec_tag;             ///< internal codec_tag upper case converted from avctx codec_tag
227
    int stream_codec_tag;      ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
228
    /* the following fields are managed internally by the encoder */
229

    
230
    /** bit output */
231
    PutBitContext pb;
232

    
233
    /* sequence parameters */
234
    int context_initialized;
235
    int input_picture_number;  ///< used to set pic->display_picture_number, should not be used for/by anything else
236
    int coded_picture_number;  ///< used to set pic->coded_picture_number, should not be used for/by anything else
237
    int picture_number;       //FIXME remove, unclear definition
238
    int picture_in_gop_number; ///< 0-> first pic in gop, ...
239
    int b_frames_since_non_b;  ///< used for encoding, relative to not yet reordered input
240
    int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
241
    int mb_width, mb_height;   ///< number of MBs horizontally & vertically
242
    int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
243
    int b8_stride;             ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
244
    int b4_stride;             ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
245
    int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
246
    int mb_num;                ///< number of MBs of a picture
247
    int linesize;              ///< line size, in bytes, may be different from width
248
    int uvlinesize;            ///< line size, for chroma in bytes, may be different from width
249
    Picture *picture;          ///< main picture buffer
250
    Picture **input_picture;   ///< next pictures on display order for encoding
251
    Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
252

    
253
    int start_mb_y;            ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
254
    int end_mb_y;              ///< end   mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
255
    struct MpegEncContext *thread_context[MAX_THREADS];
256

    
257
    /**
258
     * copy of the previous picture structure.
259
     * note, linesize & data, might not match the previous picture (for field pictures)
260
     */
261
    Picture last_picture;
262

    
263
    /**
264
     * copy of the next picture structure.
265
     * note, linesize & data, might not match the next picture (for field pictures)
266
     */
267
    Picture next_picture;
268

    
269
    /**
270
     * copy of the source picture structure for encoding.
271
     * note, linesize & data, might not match the source picture (for field pictures)
272
     */
273
    Picture new_picture;
274

    
275
    /**
276
     * copy of the current picture structure.
277
     * note, linesize & data, might not match the current picture (for field pictures)
278
     */
279
    Picture current_picture;    ///< buffer to store the decompressed current picture
280

    
281
    Picture *last_picture_ptr;     ///< pointer to the previous picture.
282
    Picture *next_picture_ptr;     ///< pointer to the next picture (for bidir pred)
283
    Picture *current_picture_ptr;  ///< pointer to the current picture
284
    uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization
285
    int last_dc[3];                ///< last DC values for MPEG1
286
    int16_t *dc_val_base;
287
    int16_t *dc_val[3];            ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
288
    int16_t dc_cache[4*5];
289
    int y_dc_scale, c_dc_scale;
290
    const uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table
291
    const uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table
292
    const uint8_t *chroma_qscale_table;  ///< qscale -> chroma_qscale (h263)
293
    uint8_t *coded_block_base;
294
    uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
295
    int16_t (*ac_val_base)[16];
296
    int16_t (*ac_val[3])[16];      ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
297
    int ac_pred;
298
    uint8_t *prev_pict_types;     ///< previous picture types in bitstream order, used for mb skip
299
#define PREV_PICT_TYPES_BUFFER_SIZE 256
300
    int mb_skipped;                ///< MUST BE SET only during DECODING
301
    uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example)
302
                                   and used for b-frame encoding & decoding (contains skip table of next P Frame) */
303
    uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
304
    uint8_t *cbp_table;           ///< used to store cbp, ac_pred for partitioned decoding
305
    uint8_t *pred_dir_table;      ///< used to store pred_dir for partitioned decoding
306
    uint8_t *allocated_edge_emu_buffer;
307
    uint8_t *edge_emu_buffer;     ///< points into the middle of allocated_edge_emu_buffer
308
    uint8_t *rd_scratchpad;       ///< scratchpad for rate distortion mb decision
309
    uint8_t *obmc_scratchpad;
310
    uint8_t *b_scratchpad;        ///< scratchpad used for writing into write only buffers
311

    
312
    int qscale;                 ///< QP
313
    int chroma_qscale;          ///< chroma QP
314
    unsigned int lambda;        ///< lagrange multipler used in rate distortion
315
    unsigned int lambda2;       ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
316
    int *lambda_table;
317
    int adaptive_quant;         ///< use adaptive quantization
318
    int dquant;                 ///< qscale difference to prev qscale
319
    int pict_type;              ///< I_TYPE, P_TYPE, B_TYPE, ...
320
    int last_pict_type; //FIXME removes
321
    int last_non_b_pict_type;   ///< used for mpeg4 gmc b-frames & ratecontrol
322
    int dropable;
323
    int frame_rate_index;
324
    int last_lambda_for[5];     ///< last lambda for a specific pict type
325
    int skipdct;                ///< skip dct and code zero residual
326

    
327
    /* motion compensation */
328
    int unrestricted_mv;        ///< mv can point outside of the coded picture
329
    int h263_long_vectors;      ///< use horrible h263v1 long vector mode
330
    int decode;                 ///< if 0 then decoding will be skipped (for encoding b frames for example)
331

    
332
    DSPContext dsp;             ///< pointers for accelerated dsp functions
333
    int f_code;                 ///< forward MV resolution
334
    int b_code;                 ///< backward MV resolution for B Frames (mpeg4)
335
    int16_t (*p_mv_table_base)[2];
336
    int16_t (*b_forw_mv_table_base)[2];
337
    int16_t (*b_back_mv_table_base)[2];
338
    int16_t (*b_bidir_forw_mv_table_base)[2];
339
    int16_t (*b_bidir_back_mv_table_base)[2];
340
    int16_t (*b_direct_mv_table_base)[2];
341
    int16_t (*p_field_mv_table_base[2][2])[2];
342
    int16_t (*b_field_mv_table_base[2][2][2])[2];
343
    int16_t (*p_mv_table)[2];            ///< MV table (1MV per MB) p-frame encoding
344
    int16_t (*b_forw_mv_table)[2];       ///< MV table (1MV per MB) forward mode b-frame encoding
345
    int16_t (*b_back_mv_table)[2];       ///< MV table (1MV per MB) backward mode b-frame encoding
346
    int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
347
    int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
348
    int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode b-frame encoding
349
    int16_t (*p_field_mv_table[2][2])[2];   ///< MV table (2MV per MB) interlaced p-frame encoding
350
    int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
351
    uint8_t (*p_field_select_table[2]);
352
    uint8_t (*b_field_select_table[2][2]);
353
    int me_method;                       ///< ME algorithm
354
    int mv_dir;
355
#define MV_DIR_FORWARD   1
356
#define MV_DIR_BACKWARD  2
357
#define MV_DIRECT        4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
358
    int mv_type;
359
#define MV_TYPE_16X16       0   ///< 1 vector for the whole mb
360
#define MV_TYPE_8X8         1   ///< 4 vectors (h263, mpeg4 4MV)
361
#define MV_TYPE_16X8        2   ///< 2 vectors, one per 16x8 block
362
#define MV_TYPE_FIELD       3   ///< 2 vectors, one per field
363
#define MV_TYPE_DMV         4   ///< 2 vectors, special mpeg2 Dual Prime Vectors
364
    /**motion vectors for a macroblock
365
       first coordinate : 0 = forward 1 = backward
366
       second "         : depend on type
367
       third  "         : 0 = x, 1 = y
368
    */
369
    int mv[2][4][2];
370
    int field_select[2][2];
371
    int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
372
    uint8_t *fcode_tab;               ///< smallest fcode needed for each MV
373
    int16_t direct_scale_mv[2][64];   ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
374

    
375
    MotionEstContext me;
376

    
377
    int no_rounding;  /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
378
                        for b-frames rounding mode is always 0 */
379

    
380
    int hurry_up;     /**< when set to 1 during decoding, b frames will be skipped
381
                         when set to 2 idct/dequant will be skipped too */
382

    
383
    /* macroblock layer */
384
    int mb_x, mb_y;
385
    int mb_skip_run;
386
    int mb_intra;
387
    uint16_t *mb_type;           ///< Table for candidate MB types for encoding
388
#define CANDIDATE_MB_TYPE_INTRA    0x01
389
#define CANDIDATE_MB_TYPE_INTER    0x02
390
#define CANDIDATE_MB_TYPE_INTER4V  0x04
391
#define CANDIDATE_MB_TYPE_SKIPPED   0x08
392
//#define MB_TYPE_GMC      0x10
393

    
394
#define CANDIDATE_MB_TYPE_DIRECT   0x10
395
#define CANDIDATE_MB_TYPE_FORWARD  0x20
396
#define CANDIDATE_MB_TYPE_BACKWARD 0x40
397
#define CANDIDATE_MB_TYPE_BIDIR    0x80
398

    
399
#define CANDIDATE_MB_TYPE_INTER_I    0x100
400
#define CANDIDATE_MB_TYPE_FORWARD_I  0x200
401
#define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
402
#define CANDIDATE_MB_TYPE_BIDIR_I    0x800
403

    
404
#define CANDIDATE_MB_TYPE_DIRECT0    0x1000
405

    
406
    int block_index[6]; ///< index to current MB in block based arrays with edges
407
    int block_wrap[6];
408
    uint8_t *dest[3];
409

    
410
    int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride
411

    
412
    /** matrix transmitted in the bitstream */
413
    uint16_t intra_matrix[64];
414
    uint16_t chroma_intra_matrix[64];
415
    uint16_t inter_matrix[64];
416
    uint16_t chroma_inter_matrix[64];
417
#define QUANT_BIAS_SHIFT 8
418
    int intra_quant_bias;    ///< bias for the quantizer
419
    int inter_quant_bias;    ///< bias for the quantizer
420
    int min_qcoeff;          ///< minimum encodable coefficient
421
    int max_qcoeff;          ///< maximum encodable coefficient
422
    int ac_esc_length;       ///< num of bits needed to encode the longest esc
423
    uint8_t *intra_ac_vlc_length;
424
    uint8_t *intra_ac_vlc_last_length;
425
    uint8_t *inter_ac_vlc_length;
426
    uint8_t *inter_ac_vlc_last_length;
427
    uint8_t *luma_dc_vlc_length;
428
    uint8_t *chroma_dc_vlc_length;
429
#define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
430

    
431
    int coded_score[8];
432

    
433
    /** precomputed matrix (combine qscale and DCT renorm) */
434
    int (*q_intra_matrix)[64];
435
    int (*q_inter_matrix)[64];
436
    /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
437
    uint16_t (*q_intra_matrix16)[2][64];
438
    uint16_t (*q_inter_matrix16)[2][64];
439
    int block_last_index[12];  ///< last non zero coefficient in block
440
    /* scantables */
441
    DECLARE_ALIGNED_8(ScanTable, intra_scantable);
442
    ScanTable intra_h_scantable;
443
    ScanTable intra_v_scantable;
444
    ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
445

    
446
    /* noise reduction */
447
    int (*dct_error_sum)[64];
448
    int dct_count[2];
449
    uint16_t (*dct_offset)[64];
450

    
451
    void *opaque;              ///< private data for the user
452

    
453
    /* bit rate control */
454
    int64_t wanted_bits;
455
    int64_t total_bits;
456
    int frame_bits;                ///< bits used for the current frame
457
    int next_lambda;               ///< next lambda used for retrying to encode a frame
458
    RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
459

    
460
    /* statistics, used for 2-pass encoding */
461
    int mv_bits;
462
    int header_bits;
463
    int i_tex_bits;
464
    int p_tex_bits;
465
    int i_count;
466
    int f_count;
467
    int b_count;
468
    int skip_count;
469
    int misc_bits; ///< cbp, mb_type
470
    int last_bits; ///< temp var used for calculating the above vars
471

    
472
    /* error concealment / resync */
473
    int error_count;
474
    uint8_t *error_status_table;       ///< table of the error status of each MB
475
#define VP_START            1          ///< current MB is the first after a resync marker
476
#define AC_ERROR            2
477
#define DC_ERROR            4
478
#define MV_ERROR            8
479
#define AC_END              16
480
#define DC_END              32
481
#define MV_END              64
482
//FIXME some prefix?
483

    
484
    int resync_mb_x;                 ///< x position of last resync marker
485
    int resync_mb_y;                 ///< y position of last resync marker
486
    GetBitContext last_resync_gb;    ///< used to search for the next resync marker
487
    int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)
488
    int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed b frames
489
    int error_resilience;
490

    
491
    ParseContext parse_context;
492

    
493
    /* H.263 specific */
494
    int gob_index;
495
    int obmc;                       ///< overlapped block motion compensation
496

    
497
    /* H.263+ specific */
498
    int umvplus;                    ///< == H263+ && unrestricted_mv
499
    int h263_aic;                   ///< Advanded INTRA Coding (AIC)
500
    int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top
501
    int h263_slice_structured;
502
    int alt_inter_vlc;              ///< alternative inter vlc
503
    int modified_quant;
504
    int loop_filter;
505
    int custom_pcf;
506

    
507
    /* mpeg4 specific */
508
    int time_increment_bits;        ///< number of bits to represent the fractional part of time
509
    int last_time_base;
510
    int time_base;                  ///< time in seconds of last I,P,S Frame
511
    int64_t time;                   ///< time of current frame
512
    int64_t last_non_b_time;
513
    uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames
514
    uint16_t pb_time;               ///< time distance between the last b and p,s,i frame
515
    uint16_t pp_field_time;
516
    uint16_t pb_field_time;         ///< like above, just for interlaced
517
    int shape;
518
    int vol_sprite_usage;
519
    int sprite_width;
520
    int sprite_height;
521
    int sprite_left;
522
    int sprite_top;
523
    int sprite_brightness_change;
524
    int num_sprite_warping_points;
525
    int real_sprite_warping_points;
526
    int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY]
527
    int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]
528
    int sprite_shift[2];             ///< sprite shift [isChroma]
529
    int mcsel;
530
    int quant_precision;
531
    int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC
532
    int scalability;
533
    int hierachy_type;
534
    int enhancement_type;
535
    int new_pred;
536
    int reduced_res_vop;
537
    int aspect_ratio_info; //FIXME remove
538
    int sprite_warping_accuracy;
539
    int low_latency_sprite;
540
    int data_partitioning;           ///< data partitioning flag from header
541
    int partitioned_frame;           ///< is current frame partitioned
542
    int rvlc;                        ///< reversible vlc
543
    int resync_marker;               ///< could this stream contain resync markers
544
    int low_delay;                   ///< no reordering needed / has no b-frames
545
    int vo_type;
546
    int vol_control_parameters;      ///< does the stream contain the low_delay flag, used to workaround buggy encoders
547
    int intra_dc_threshold;          ///< QP above whch the ac VLC should be used for intra dc
548
    int use_intra_dc_vlc;
549
    PutBitContext tex_pb;            ///< used for data partitioned VOPs
550
    PutBitContext pb2;               ///< used for data partitioned VOPs
551
    int mpeg_quant;
552
    int t_frame;                       ///< time distance of first I -> B, used for interlaced b frames
553
    int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG4
554

    
555
    /* divx specific, used to workaround (many) bugs in divx5 */
556
    int divx_version;
557
    int divx_build;
558
    int divx_packed;
559
    uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
560
    int bitstream_buffer_size;
561
    unsigned int allocated_bitstream_buffer_size;
562

    
563
    int xvid_build;
564

    
565
    /* lavc specific stuff, used to workaround bugs in libavcodec */
566
    int lavc_build;
567

    
568
    /* RV10 specific */
569
    int rv10_version; ///< RV10 version: 0 or 3
570
    int rv10_first_dc_coded[3];
571

    
572
    /* MJPEG specific */
573
    struct MJpegContext *mjpeg_ctx;
574
    int mjpeg_vsample[3];       ///< vertical sampling factors, default = {2, 1, 1}
575
    int mjpeg_hsample[3];       ///< horizontal sampling factors, default = {2, 1, 1}
576

    
577
    /* MSMPEG4 specific */
578
    int mv_table_index;
579
    int rl_table_index;
580
    int rl_chroma_table_index;
581
    int dc_table_index;
582
    int use_skip_mb_code;
583
    int slice_height;      ///< in macroblocks
584
    int first_slice_line;  ///< used in mpeg4 too to handle resync markers
585
    int flipflop_rounding;
586
    int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
587
    int per_mb_rl_table;
588
    int esc3_level_length;
589
    int esc3_run_length;
590
    /** [mb_intra][isChroma][level][run][last] */
591
    int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
592
    int inter_intra_pred;
593
    int mspel;
594

    
595
    /* decompression specific */
596
    GetBitContext gb;
597

    
598
    /* Mpeg1 specific */
599
    int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
600
    int last_mv_dir;         ///< last mv_dir, used for b frame encoding
601
    int broken_link;         ///< no_output_of_prior_pics_flag
602
    uint8_t *vbv_delay_ptr;  ///< pointer to vbv_delay in the bitstream
603

    
604
    /* MPEG2 specific - I wish I had not to support this mess. */
605
    int progressive_sequence;
606
    int mpeg_f_code[2][2];
607
    int picture_structure;
608
/* picture type */
609
#define PICT_TOP_FIELD     1
610
#define PICT_BOTTOM_FIELD  2
611
#define PICT_FRAME         3
612

    
613
    int intra_dc_precision;
614
    int frame_pred_frame_dct;
615
    int top_field_first;
616
    int concealment_motion_vectors;
617
    int q_scale_type;
618
    int intra_vlc_format;
619
    int alternate_scan;
620
    int repeat_first_field;
621
    int chroma_420_type;
622
    int chroma_format;
623
#define CHROMA_420 1
624
#define CHROMA_422 2
625
#define CHROMA_444 3
626
    int chroma_x_shift;//depend on pix_format, that depend on chroma_format
627
    int chroma_y_shift;
628

    
629
    int progressive_frame;
630
    int full_pel[2];
631
    int interlaced_dct;
632
    int first_slice;
633
    int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
634

    
635
    /* RTP specific */
636
    int rtp_mode;
637

    
638
    uint8_t *ptr_lastgob;
639
    int swap_uv;//vcr2 codec is mpeg2 varint with UV swaped
640
    short * pblocks[12];
641

    
642
    DCTELEM (*block)[64]; ///< points to one of the following blocks
643
    DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
644
    int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
645
#define SLICE_OK         0
646
#define SLICE_ERROR     -1
647
#define SLICE_END       -2 ///<end marker found
648
#define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded
649

    
650
    void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
651
                           DCTELEM *block/*align 16*/, int n, int qscale);
652
    void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
653
                           DCTELEM *block/*align 16*/, int n, int qscale);
654
    void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
655
                           DCTELEM *block/*align 16*/, int n, int qscale);
656
    void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
657
                           DCTELEM *block/*align 16*/, int n, int qscale);
658
    void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
659
                           DCTELEM *block/*align 16*/, int n, int qscale);
660
    void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
661
                           DCTELEM *block/*align 16*/, int n, int qscale);
662
    void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
663
                           DCTELEM *block/*align 16*/, int n, int qscale);
664
    void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
665
                           DCTELEM *block/*align 16*/, int n, int qscale);
666
    void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
667
                           DCTELEM *block/*align 16*/, int n, int qscale);
668
    void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
669
                           DCTELEM *block/*align 16*/, int n, int qscale);
670
    int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
671
    int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
672
    void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
673
} MpegEncContext;
674

    
675

    
676
void MPV_decode_defaults(MpegEncContext *s);
677
int MPV_common_init(MpegEncContext *s);
678
void MPV_common_end(MpegEncContext *s);
679
void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
680
int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
681
void MPV_frame_end(MpegEncContext *s);
682
int MPV_encode_init(AVCodecContext *avctx);
683
int MPV_encode_end(AVCodecContext *avctx);
684
int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
685
void MPV_common_init_mmx(MpegEncContext *s);
686
void MPV_common_init_axp(MpegEncContext *s);
687
void MPV_common_init_mlib(MpegEncContext *s);
688
void MPV_common_init_mmi(MpegEncContext *s);
689
void MPV_common_init_armv4l(MpegEncContext *s);
690
void MPV_common_init_altivec(MpegEncContext *s);
691
void ff_clean_intra_table_entries(MpegEncContext *s);
692
void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
693
void ff_mpeg_flush(AVCodecContext *avctx);
694
void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
695
void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
696
int ff_find_unused_picture(MpegEncContext *s, int shared);
697
void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
698
void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
699
const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
700

    
701
void ff_er_frame_start(MpegEncContext *s);
702
void ff_er_frame_end(MpegEncContext *s);
703
void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
704

    
705
int ff_dct_common_init(MpegEncContext *s);
706
void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
707
                       const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
708

    
709
void ff_init_block_index(MpegEncContext *s);
710

    
711
static inline void ff_update_block_index(MpegEncContext *s){
712
    const int block_size= 8>>s->avctx->lowres;
713

    
714
    s->block_index[0]+=2;
715
    s->block_index[1]+=2;
716
    s->block_index[2]+=2;
717
    s->block_index[3]+=2;
718
    s->block_index[4]++;
719
    s->block_index[5]++;
720
    s->dest[0]+= 2*block_size;
721
    s->dest[1]+= block_size;
722
    s->dest[2]+= block_size;
723
}
724

    
725
static inline int get_bits_diff(MpegEncContext *s){
726
    const int bits= put_bits_count(&s->pb);
727
    const int last= s->last_bits;
728

    
729
    s->last_bits = bits;
730

    
731
    return bits - last;
732
}
733

    
734
static inline int ff_h263_round_chroma(int x){
735
    static const uint8_t h263_chroma_roundtab[16] = {
736
    //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
737
        0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
738
    };
739
    return h263_chroma_roundtab[x & 0xf] + (x >> 3);
740
}
741

    
742
/* motion_est.c */
743
void ff_estimate_p_frame_motion(MpegEncContext * s,
744
                             int mb_x, int mb_y);
745
void ff_estimate_b_frame_motion(MpegEncContext * s,
746
                             int mb_x, int mb_y);
747
int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
748
void ff_fix_long_p_mvs(MpegEncContext * s);
749
void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
750
                     int16_t (*mv_table)[2], int f_code, int type, int truncate);
751
void ff_init_me(MpegEncContext *s);
752
int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
753
int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
754
                             int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
755
                             int ref_mv_scale, int size, int h);
756
int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
757
                               int ref_index, int size, int h, int add_rate);
758

    
759
/* mpeg12.c */
760
extern const uint8_t ff_mpeg1_dc_scale_table[128];
761

    
762
void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
763
void mpeg1_encode_mb(MpegEncContext *s,
764
                     DCTELEM block[6][64],
765
                     int motion_x, int motion_y);
766
void ff_mpeg1_encode_init(MpegEncContext *s);
767
void ff_mpeg1_encode_slice_header(MpegEncContext *s);
768
void ff_mpeg1_clean_buffers(MpegEncContext *s);
769
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
770

    
771
extern const uint8_t ff_mpeg4_y_dc_scale_table[32];
772
extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
773
extern const uint8_t ff_aic_dc_scale_table[32];
774
extern const int16_t ff_mpeg4_default_intra_matrix[64];
775
extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
776
extern const uint8_t ff_h263_chroma_qscale_table[32];
777
extern const uint8_t ff_h263_loop_filter_strength[32];
778

    
779
/* h261.c */
780
void ff_h261_loop_filter(MpegEncContext *s);
781
void ff_h261_reorder_mb_index(MpegEncContext* s);
782
void ff_h261_encode_mb(MpegEncContext *s,
783
                    DCTELEM block[6][64],
784
                    int motion_x, int motion_y);
785
void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
786
void ff_h261_encode_init(MpegEncContext *s);
787
int ff_h261_get_picture_format(int width, int height);
788

    
789

    
790
/* h263.c, h263dec.c */
791
int ff_h263_decode_init(AVCodecContext *avctx);
792
int ff_h263_decode_frame(AVCodecContext *avctx,
793
                             void *data, int *data_size,
794
                             const uint8_t *buf, int buf_size);
795
int ff_h263_decode_end(AVCodecContext *avctx);
796
void h263_encode_mb(MpegEncContext *s,
797
                    DCTELEM block[6][64],
798
                    int motion_x, int motion_y);
799
void mpeg4_encode_mb(MpegEncContext *s,
800
                    DCTELEM block[6][64],
801
                    int motion_x, int motion_y);
802
void h263_encode_picture_header(MpegEncContext *s, int picture_number);
803
void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
804
void h263_encode_gob_header(MpegEncContext * s, int mb_line);
805
int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
806
                        int *px, int *py);
807
void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
808
                   int dir);
809
void ff_set_mpeg4_time(MpegEncContext * s);
810
void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
811
void h263_encode_init(MpegEncContext *s);
812
void h263_decode_init_vlc(MpegEncContext *s);
813
int h263_decode_picture_header(MpegEncContext *s);
814
int ff_h263_decode_gob_header(MpegEncContext *s);
815
int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
816
void ff_h263_update_motion_val(MpegEncContext * s);
817
void ff_h263_loop_filter(MpegEncContext * s);
818
void ff_set_qscale(MpegEncContext * s, int qscale);
819
int ff_h263_decode_mba(MpegEncContext *s);
820
void ff_h263_encode_mba(MpegEncContext *s);
821

    
822
int intel_h263_decode_picture_header(MpegEncContext *s);
823
int flv_h263_decode_picture_header(MpegEncContext *s);
824
int ff_h263_decode_mb(MpegEncContext *s,
825
                      DCTELEM block[6][64]);
826
int ff_mpeg4_decode_mb(MpegEncContext *s,
827
                      DCTELEM block[6][64]);
828
int h263_get_picture_format(int width, int height);
829
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
830
void ff_mpeg4_clean_buffers(MpegEncContext *s);
831
void ff_mpeg4_stuffing(PutBitContext * pbc);
832
void ff_mpeg4_init_partitions(MpegEncContext *s);
833
void ff_mpeg4_merge_partitions(MpegEncContext *s);
834
void ff_clean_mpeg4_qscales(MpegEncContext *s);
835
void ff_clean_h263_qscales(MpegEncContext *s);
836
int ff_mpeg4_decode_partitions(MpegEncContext *s);
837
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
838
int ff_h263_resync(MpegEncContext *s);
839
int ff_h263_get_gob_height(MpegEncContext *s);
840
void ff_mpeg4_init_direct_mv(MpegEncContext *s);
841
int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
842
void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
843

    
844

    
845
/* rv10.c */
846
void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
847
int rv_decode_dc(MpegEncContext *s, int n);
848
void rv20_encode_picture_header(MpegEncContext *s, int picture_number);
849

    
850

    
851
/* msmpeg4.c */
852
void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
853
void msmpeg4_encode_ext_header(MpegEncContext * s);
854
void msmpeg4_encode_mb(MpegEncContext * s,
855
                       DCTELEM block[6][64],
856
                       int motion_x, int motion_y);
857
int msmpeg4_decode_picture_header(MpegEncContext * s);
858
int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
859
int ff_msmpeg4_decode_init(MpegEncContext *s);
860
void ff_msmpeg4_encode_init(MpegEncContext *s);
861
int ff_wmv2_decode_picture_header(MpegEncContext * s);
862
int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
863
void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
864
void ff_mspel_motion(MpegEncContext *s,
865
                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
866
                               uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
867
                               int motion_x, int motion_y, int h);
868
int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
869
void ff_wmv2_encode_mb(MpegEncContext * s,
870
                       DCTELEM block[6][64],
871
                       int motion_x, int motion_y);
872

    
873
#endif /* FFMPEG_MPEGVIDEO_H */
874