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ffmpeg / libavcodec / mpeg4videoenc.c @ 2912e87a

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1
/*
2
 * MPEG4 encoder.
3
 * Copyright (c) 2000,2001 Fabrice Bellard
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 * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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23
#include "mpegvideo.h"
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#include "h263.h"
25
#include "mpeg4video.h"
26

    
27
//The uni_DCtab_* tables below contain unified bits+length tables to encode DC
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//differences in mpeg4. Unified in the sense that the specification specifies
29
//this encoding in several steps.
30
static uint8_t uni_DCtab_lum_len[512];
31
static uint8_t uni_DCtab_chrom_len[512];
32
static uint16_t uni_DCtab_lum_bits[512];
33
static uint16_t uni_DCtab_chrom_bits[512];
34

    
35
//unified encoding tables for run length encoding of coefficients
36
//unified in the sense that the specification specifies the encoding in several steps.
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static uint32_t uni_mpeg4_intra_rl_bits[64*64*2*2];
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static uint8_t  uni_mpeg4_intra_rl_len [64*64*2*2];
39
static uint32_t uni_mpeg4_inter_rl_bits[64*64*2*2];
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static uint8_t  uni_mpeg4_inter_rl_len [64*64*2*2];
41
//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level))
42
//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64)
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#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level))
44

    
45
/* mpeg4
46
inter
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max level: 24/6
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max run: 53/63
49

50
intra
51
max level: 53/16
52
max run: 29/41
53
*/
54

    
55

    
56
/**
57
 * Return the number of bits that encoding the 8x8 block in block would need.
58
 * @param[in]  block_last_index last index in scantable order that refers to a non zero element in block.
59
 */
60
static inline int get_block_rate(MpegEncContext * s, DCTELEM block[64], int block_last_index, uint8_t scantable[64]){
61
    int last=0;
62
    int j;
63
    int rate=0;
64

    
65
    for(j=1; j<=block_last_index; j++){
66
        const int index= scantable[j];
67
        int level= block[index];
68
        if(level){
69
            level+= 64;
70
            if((level&(~127)) == 0){
71
                if(j<block_last_index) rate+= s->intra_ac_vlc_length     [UNI_AC_ENC_INDEX(j-last-1, level)];
72
                else                   rate+= s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j-last-1, level)];
73
            }else
74
                rate += s->ac_esc_length;
75

    
76
            last= j;
77
        }
78
    }
79

    
80
    return rate;
81
}
82

    
83

    
84
/**
85
 * Restore the ac coefficients in block that have been changed by decide_ac_pred().
86
 * This function also restores s->block_last_index.
87
 * @param[in,out] block MB coefficients, these will be restored
88
 * @param[in] dir ac prediction direction for each 8x8 block
89
 * @param[out] st scantable for each 8x8 block
90
 * @param[in] zigzag_last_index index refering to the last non zero coefficient in zigzag order
91
 */
92
static inline void restore_ac_coeffs(MpegEncContext * s, DCTELEM block[6][64], const int dir[6], uint8_t *st[6], const int zigzag_last_index[6])
93
{
94
    int i, n;
95
    memcpy(s->block_last_index, zigzag_last_index, sizeof(int)*6);
96

    
97
    for(n=0; n<6; n++){
98
        int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
99

    
100
        st[n]= s->intra_scantable.permutated;
101
        if(dir[n]){
102
            /* top prediction */
103
            for(i=1; i<8; i++){
104
                block[n][s->dsp.idct_permutation[i   ]] = ac_val[i+8];
105
            }
106
        }else{
107
            /* left prediction */
108
            for(i=1; i<8; i++){
109
                block[n][s->dsp.idct_permutation[i<<3]]= ac_val[i  ];
110
            }
111
        }
112
    }
113
}
114

    
115
/**
116
 * Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
117
 * This function will also update s->block_last_index and s->ac_val.
118
 * @param[in,out] block MB coefficients, these will be updated if 1 is returned
119
 * @param[in] dir ac prediction direction for each 8x8 block
120
 * @param[out] st scantable for each 8x8 block
121
 * @param[out] zigzag_last_index index refering to the last non zero coefficient in zigzag order
122
 */
123
static inline int decide_ac_pred(MpegEncContext * s, DCTELEM block[6][64], const int dir[6], uint8_t *st[6], int zigzag_last_index[6])
124
{
125
    int score= 0;
126
    int i, n;
127
    int8_t * const qscale_table= s->current_picture.qscale_table;
128

    
129
    memcpy(zigzag_last_index, s->block_last_index, sizeof(int)*6);
130

    
131
    for(n=0; n<6; n++){
132
        int16_t *ac_val, *ac_val1;
133

    
134
        score -= get_block_rate(s, block[n], s->block_last_index[n], s->intra_scantable.permutated);
135

    
136
        ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
137
        ac_val1= ac_val;
138
        if(dir[n]){
139
            const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride;
140
            /* top prediction */
141
            ac_val-= s->block_wrap[n]*16;
142
            if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){
143
                /* same qscale */
144
                for(i=1; i<8; i++){
145
                    const int level= block[n][s->dsp.idct_permutation[i   ]];
146
                    block[n][s->dsp.idct_permutation[i   ]] = level - ac_val[i+8];
147
                    ac_val1[i  ]=    block[n][s->dsp.idct_permutation[i<<3]];
148
                    ac_val1[i+8]= level;
149
                }
150
            }else{
151
                /* different qscale, we must rescale */
152
                for(i=1; i<8; i++){
153
                    const int level= block[n][s->dsp.idct_permutation[i   ]];
154
                    block[n][s->dsp.idct_permutation[i   ]] = level - ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale);
155
                    ac_val1[i  ]=    block[n][s->dsp.idct_permutation[i<<3]];
156
                    ac_val1[i+8]= level;
157
                }
158
            }
159
            st[n]= s->intra_h_scantable.permutated;
160
        }else{
161
            const int xy= s->mb_x-1 + s->mb_y*s->mb_stride;
162
            /* left prediction */
163
            ac_val-= 16;
164
            if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){
165
                /* same qscale */
166
                for(i=1; i<8; i++){
167
                    const int level= block[n][s->dsp.idct_permutation[i<<3]];
168
                    block[n][s->dsp.idct_permutation[i<<3]]= level - ac_val[i];
169
                    ac_val1[i  ]= level;
170
                    ac_val1[i+8]=    block[n][s->dsp.idct_permutation[i   ]];
171
                }
172
            }else{
173
                /* different qscale, we must rescale */
174
                for(i=1; i<8; i++){
175
                    const int level= block[n][s->dsp.idct_permutation[i<<3]];
176
                    block[n][s->dsp.idct_permutation[i<<3]]= level - ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale);
177
                    ac_val1[i  ]= level;
178
                    ac_val1[i+8]=    block[n][s->dsp.idct_permutation[i   ]];
179
                }
180
            }
181
            st[n]= s->intra_v_scantable.permutated;
182
        }
183

    
184
        for(i=63; i>0; i--) //FIXME optimize
185
            if(block[n][ st[n][i] ]) break;
186
        s->block_last_index[n]= i;
187

    
188
        score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
189
    }
190

    
191
    if(score < 0){
192
        return 1;
193
    }else{
194
        restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
195
        return 0;
196
    }
197
}
198

    
199
/**
200
 * modify mb_type & qscale so that encoding is acually possible in mpeg4
201
 */
202
void ff_clean_mpeg4_qscales(MpegEncContext *s){
203
    int i;
204
    int8_t * const qscale_table= s->current_picture.qscale_table;
205

    
206
    ff_clean_h263_qscales(s);
207

    
208
    if(s->pict_type== FF_B_TYPE){
209
        int odd=0;
210
        /* ok, come on, this isn't funny anymore, there's more code for handling this mpeg4 mess than for the actual adaptive quantization */
211

    
212
        for(i=0; i<s->mb_num; i++){
213
            int mb_xy= s->mb_index2xy[i];
214
            odd += qscale_table[mb_xy]&1;
215
        }
216

    
217
        if(2*odd > s->mb_num) odd=1;
218
        else                  odd=0;
219

    
220
        for(i=0; i<s->mb_num; i++){
221
            int mb_xy= s->mb_index2xy[i];
222
            if((qscale_table[mb_xy]&1) != odd)
223
                qscale_table[mb_xy]++;
224
            if(qscale_table[mb_xy] > 31)
225
                qscale_table[mb_xy]= 31;
226
        }
227

    
228
        for(i=1; i<s->mb_num; i++){
229
            int mb_xy= s->mb_index2xy[i];
230
            if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_DIRECT)){
231
                s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_BIDIR;
232
            }
233
        }
234
    }
235
}
236

    
237

    
238
/**
239
 * encodes the dc value.
240
 * @param n block index (0-3 are luma, 4-5 are chroma)
241
 */
242
static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n)
243
{
244
#if 1
245
    /* DC will overflow if level is outside the [-255,255] range. */
246
    level+=256;
247
    if (n < 4) {
248
        /* luminance */
249
        put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
250
    } else {
251
        /* chrominance */
252
        put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
253
    }
254
#else
255
    int size, v;
256
    /* find number of bits */
257
    size = 0;
258
    v = abs(level);
259
    while (v) {
260
        v >>= 1;
261
        size++;
262
    }
263

    
264
    if (n < 4) {
265
        /* luminance */
266
        put_bits(&s->pb, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]);
267
    } else {
268
        /* chrominance */
269
        put_bits(&s->pb, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]);
270
    }
271

    
272
    /* encode remaining bits */
273
    if (size > 0) {
274
        if (level < 0)
275
            level = (-level) ^ ((1 << size) - 1);
276
        put_bits(&s->pb, size, level);
277
        if (size > 8)
278
            put_bits(&s->pb, 1, 1);
279
    }
280
#endif
281
}
282

    
283
static inline int mpeg4_get_dc_length(int level, int n){
284
    if (n < 4) {
285
        return uni_DCtab_lum_len[level + 256];
286
    } else {
287
        return uni_DCtab_chrom_len[level + 256];
288
    }
289
}
290

    
291
/**
292
 * encodes a 8x8 block
293
 * @param n block index (0-3 are luma, 4-5 are chroma)
294
 */
295
static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
296
                               uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
297
{
298
    int i, last_non_zero;
299
#if 0 //variables for the outcommented version
300
    int code, sign, last;
301
#endif
302
    const RLTable *rl;
303
    uint32_t *bits_tab;
304
    uint8_t *len_tab;
305
    const int last_index = s->block_last_index[n];
306

    
307
    if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
308
        /* mpeg4 based DC predictor */
309
        mpeg4_encode_dc(dc_pb, intra_dc, n);
310
        if(last_index<1) return;
311
        i = 1;
312
        rl = &ff_mpeg4_rl_intra;
313
        bits_tab= uni_mpeg4_intra_rl_bits;
314
        len_tab = uni_mpeg4_intra_rl_len;
315
    } else {
316
        if(last_index<0) return;
317
        i = 0;
318
        rl = &ff_h263_rl_inter;
319
        bits_tab= uni_mpeg4_inter_rl_bits;
320
        len_tab = uni_mpeg4_inter_rl_len;
321
    }
322

    
323
    /* AC coefs */
324
    last_non_zero = i - 1;
325
#if 1
326
    for (; i < last_index; i++) {
327
        int level = block[ scan_table[i] ];
328
        if (level) {
329
            int run = i - last_non_zero - 1;
330
            level+=64;
331
            if((level&(~127)) == 0){
332
                const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
333
                put_bits(ac_pb, len_tab[index], bits_tab[index]);
334
            }else{ //ESC3
335
                put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(0<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
336
            }
337
            last_non_zero = i;
338
        }
339
    }
340
    /*if(i<=last_index)*/{
341
        int level = block[ scan_table[i] ];
342
        int run = i - last_non_zero - 1;
343
        level+=64;
344
        if((level&(~127)) == 0){
345
            const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
346
            put_bits(ac_pb, len_tab[index], bits_tab[index]);
347
        }else{ //ESC3
348
            put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(1<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
349
        }
350
    }
351
#else
352
    for (; i <= last_index; i++) {
353
        const int slevel = block[ scan_table[i] ];
354
        if (slevel) {
355
            int level;
356
            int run = i - last_non_zero - 1;
357
            last = (i == last_index);
358
            sign = 0;
359
            level = slevel;
360
            if (level < 0) {
361
                sign = 1;
362
                level = -level;
363
            }
364
            code = get_rl_index(rl, last, run, level);
365
            put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
366
            if (code == rl->n) {
367
                int level1, run1;
368
                level1 = level - rl->max_level[last][run];
369
                if (level1 < 1)
370
                    goto esc2;
371
                code = get_rl_index(rl, last, run, level1);
372
                if (code == rl->n) {
373
                esc2:
374
                    put_bits(ac_pb, 1, 1);
375
                    if (level > MAX_LEVEL)
376
                        goto esc3;
377
                    run1 = run - rl->max_run[last][level] - 1;
378
                    if (run1 < 0)
379
                        goto esc3;
380
                    code = get_rl_index(rl, last, run1, level);
381
                    if (code == rl->n) {
382
                    esc3:
383
                        /* third escape */
384
                        put_bits(ac_pb, 1, 1);
385
                        put_bits(ac_pb, 1, last);
386
                        put_bits(ac_pb, 6, run);
387
                        put_bits(ac_pb, 1, 1);
388
                        put_sbits(ac_pb, 12, slevel);
389
                        put_bits(ac_pb, 1, 1);
390
                    } else {
391
                        /* second escape */
392
                        put_bits(ac_pb, 1, 0);
393
                        put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
394
                        put_bits(ac_pb, 1, sign);
395
                    }
396
                } else {
397
                    /* first escape */
398
                    put_bits(ac_pb, 1, 0);
399
                    put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
400
                    put_bits(ac_pb, 1, sign);
401
                }
402
            } else {
403
                put_bits(ac_pb, 1, sign);
404
            }
405
            last_non_zero = i;
406
        }
407
    }
408
#endif
409
}
410

    
411
static int mpeg4_get_block_length(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
412
                               uint8_t *scan_table)
413
{
414
    int i, last_non_zero;
415
    uint8_t *len_tab;
416
    const int last_index = s->block_last_index[n];
417
    int len=0;
418

    
419
    if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
420
        /* mpeg4 based DC predictor */
421
        len += mpeg4_get_dc_length(intra_dc, n);
422
        if(last_index<1) return len;
423
        i = 1;
424
        len_tab = uni_mpeg4_intra_rl_len;
425
    } else {
426
        if(last_index<0) return 0;
427
        i = 0;
428
        len_tab = uni_mpeg4_inter_rl_len;
429
    }
430

    
431
    /* AC coefs */
432
    last_non_zero = i - 1;
433
    for (; i < last_index; i++) {
434
        int level = block[ scan_table[i] ];
435
        if (level) {
436
            int run = i - last_non_zero - 1;
437
            level+=64;
438
            if((level&(~127)) == 0){
439
                const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
440
                len += len_tab[index];
441
            }else{ //ESC3
442
                len += 7+2+1+6+1+12+1;
443
            }
444
            last_non_zero = i;
445
        }
446
    }
447
    /*if(i<=last_index)*/{
448
        int level = block[ scan_table[i] ];
449
        int run = i - last_non_zero - 1;
450
        level+=64;
451
        if((level&(~127)) == 0){
452
            const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
453
            len += len_tab[index];
454
        }else{ //ESC3
455
            len += 7+2+1+6+1+12+1;
456
        }
457
    }
458

    
459
    return len;
460
}
461

    
462
static inline void mpeg4_encode_blocks(MpegEncContext * s, DCTELEM block[6][64], int intra_dc[6],
463
                               uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb){
464
    int i;
465

    
466
    if(scan_table){
467
        if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
468
            for (i = 0; i < 6; i++) {
469
                skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, intra_dc[i], scan_table[i]));
470
            }
471
        }else{
472
            /* encode each block */
473
            for (i = 0; i < 6; i++) {
474
                mpeg4_encode_block(s, block[i], i, intra_dc[i], scan_table[i], dc_pb, ac_pb);
475
            }
476
        }
477
    }else{
478
        if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
479
            for (i = 0; i < 6; i++) {
480
                skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, 0, s->intra_scantable.permutated));
481
            }
482
        }else{
483
            /* encode each block */
484
            for (i = 0; i < 6; i++) {
485
                mpeg4_encode_block(s, block[i], i, 0, s->intra_scantable.permutated, dc_pb, ac_pb);
486
            }
487
        }
488
    }
489
}
490

    
491
//FIXME this is duplicated to h263.c
492
static const int dquant_code[5]= {1,0,9,2,3};
493

    
494
void mpeg4_encode_mb(MpegEncContext * s,
495
                    DCTELEM block[6][64],
496
                    int motion_x, int motion_y)
497
{
498
    int cbpc, cbpy, pred_x, pred_y;
499
    PutBitContext * const pb2    = s->data_partitioning                         ? &s->pb2    : &s->pb;
500
    PutBitContext * const tex_pb = s->data_partitioning && s->pict_type!=FF_B_TYPE ? &s->tex_pb : &s->pb;
501
    PutBitContext * const dc_pb  = s->data_partitioning && s->pict_type!=FF_I_TYPE ? &s->pb2    : &s->pb;
502
    const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
503

    
504
    if (!s->mb_intra) {
505
        int i, cbp;
506

    
507
        if(s->pict_type==FF_B_TYPE){
508
            static const int mb_type_table[8]= {-1, 3, 2, 1,-1,-1,-1, 0}; /* convert from mv_dir to type */
509
            int mb_type=  mb_type_table[s->mv_dir];
510

    
511
            if(s->mb_x==0){
512
                for(i=0; i<2; i++){
513
                    s->last_mv[i][0][0]=
514
                    s->last_mv[i][0][1]=
515
                    s->last_mv[i][1][0]=
516
                    s->last_mv[i][1][1]= 0;
517
                }
518
            }
519

    
520
            assert(s->dquant>=-2 && s->dquant<=2);
521
            assert((s->dquant&1)==0);
522
            assert(mb_type>=0);
523

    
524
            /* nothing to do if this MB was skipped in the next P Frame */
525
            if(s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]){ //FIXME avoid DCT & ...
526
                s->skip_count++;
527
                s->mv[0][0][0]=
528
                s->mv[0][0][1]=
529
                s->mv[1][0][0]=
530
                s->mv[1][0][1]= 0;
531
                s->mv_dir= MV_DIR_FORWARD; //doesn't matter
532
                s->qscale -= s->dquant;
533
//                s->mb_skipped=1;
534

    
535
                return;
536
            }
537

    
538
            cbp= get_b_cbp(s, block, motion_x, motion_y, mb_type);
539

    
540
            if ((cbp | motion_x | motion_y | mb_type) ==0) {
541
                /* direct MB with MV={0,0} */
542
                assert(s->dquant==0);
543

    
544
                put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
545

    
546
                if(interleaved_stats){
547
                    s->misc_bits++;
548
                    s->last_bits++;
549
                }
550
                s->skip_count++;
551
                return;
552
            }
553

    
554
            put_bits(&s->pb, 1, 0);     /* mb coded modb1=0 */
555
            put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ //FIXME merge
556
            put_bits(&s->pb, mb_type+1, 1); // this table is so simple that we don't need it :)
557
            if(cbp) put_bits(&s->pb, 6, cbp);
558

    
559
            if(cbp && mb_type){
560
                if(s->dquant)
561
                    put_bits(&s->pb, 2, (s->dquant>>2)+3);
562
                else
563
                    put_bits(&s->pb, 1, 0);
564
            }else
565
                s->qscale -= s->dquant;
566

    
567
            if(!s->progressive_sequence){
568
                if(cbp)
569
                    put_bits(&s->pb, 1, s->interlaced_dct);
570
                if(mb_type) // not direct mode
571
                    put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
572
            }
573

    
574
            if(interleaved_stats){
575
                s->misc_bits+= get_bits_diff(s);
576
            }
577

    
578
            if(mb_type == 0){
579
                assert(s->mv_dir & MV_DIRECT);
580
                ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
581
                s->b_count++;
582
                s->f_count++;
583
            }else{
584
                assert(mb_type > 0 && mb_type < 4);
585
                if(s->mv_type != MV_TYPE_FIELD){
586
                    if(s->mv_dir & MV_DIR_FORWARD){
587
                        ff_h263_encode_motion_vector(s, s->mv[0][0][0] - s->last_mv[0][0][0],
588
                                                        s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
589
                        s->last_mv[0][0][0]= s->last_mv[0][1][0]= s->mv[0][0][0];
590
                        s->last_mv[0][0][1]= s->last_mv[0][1][1]= s->mv[0][0][1];
591
                        s->f_count++;
592
                    }
593
                    if(s->mv_dir & MV_DIR_BACKWARD){
594
                        ff_h263_encode_motion_vector(s, s->mv[1][0][0] - s->last_mv[1][0][0],
595
                                                        s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
596
                        s->last_mv[1][0][0]= s->last_mv[1][1][0]= s->mv[1][0][0];
597
                        s->last_mv[1][0][1]= s->last_mv[1][1][1]= s->mv[1][0][1];
598
                        s->b_count++;
599
                    }
600
                }else{
601
                    if(s->mv_dir & MV_DIR_FORWARD){
602
                        put_bits(&s->pb, 1, s->field_select[0][0]);
603
                        put_bits(&s->pb, 1, s->field_select[0][1]);
604
                    }
605
                    if(s->mv_dir & MV_DIR_BACKWARD){
606
                        put_bits(&s->pb, 1, s->field_select[1][0]);
607
                        put_bits(&s->pb, 1, s->field_select[1][1]);
608
                    }
609
                    if(s->mv_dir & MV_DIR_FORWARD){
610
                        for(i=0; i<2; i++){
611
                            ff_h263_encode_motion_vector(s, s->mv[0][i][0] - s->last_mv[0][i][0]  ,
612
                                                            s->mv[0][i][1] - s->last_mv[0][i][1]/2, s->f_code);
613
                            s->last_mv[0][i][0]= s->mv[0][i][0];
614
                            s->last_mv[0][i][1]= s->mv[0][i][1]*2;
615
                        }
616
                        s->f_count++;
617
                    }
618
                    if(s->mv_dir & MV_DIR_BACKWARD){
619
                        for(i=0; i<2; i++){
620
                            ff_h263_encode_motion_vector(s, s->mv[1][i][0] - s->last_mv[1][i][0]  ,
621
                                                            s->mv[1][i][1] - s->last_mv[1][i][1]/2, s->b_code);
622
                            s->last_mv[1][i][0]= s->mv[1][i][0];
623
                            s->last_mv[1][i][1]= s->mv[1][i][1]*2;
624
                        }
625
                        s->b_count++;
626
                    }
627
                }
628
            }
629

    
630
            if(interleaved_stats){
631
                s->mv_bits+= get_bits_diff(s);
632
            }
633

    
634
            mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
635

    
636
            if(interleaved_stats){
637
                s->p_tex_bits+= get_bits_diff(s);
638
            }
639

    
640
        }else{ /* s->pict_type==FF_B_TYPE */
641
            cbp= get_p_cbp(s, block, motion_x, motion_y);
642

    
643
            if ((cbp | motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16) {
644
                /* check if the B frames can skip it too, as we must skip it if we skip here
645
                   why didn't they just compress the skip-mb bits instead of reusing them ?! */
646
                if(s->max_b_frames>0){
647
                    int i;
648
                    int x,y, offset;
649
                    uint8_t *p_pic;
650

    
651
                    x= s->mb_x*16;
652
                    y= s->mb_y*16;
653
                    if(x+16 > s->width)  x= s->width-16;
654
                    if(y+16 > s->height) y= s->height-16;
655

    
656
                    offset= x + y*s->linesize;
657
                    p_pic= s->new_picture.data[0] + offset;
658

    
659
                    s->mb_skipped=1;
660
                    for(i=0; i<s->max_b_frames; i++){
661
                        uint8_t *b_pic;
662
                        int diff;
663
                        Picture *pic= s->reordered_input_picture[i+1];
664

    
665
                        if(pic==NULL || pic->pict_type!=FF_B_TYPE) break;
666

    
667
                        b_pic= pic->data[0] + offset;
668
                        if(pic->type != FF_BUFFER_TYPE_SHARED)
669
                            b_pic+= INPLACE_OFFSET;
670
                        diff= s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
671
                        if(diff>s->qscale*70){ //FIXME check that 70 is optimal
672
                            s->mb_skipped=0;
673
                            break;
674
                        }
675
                    }
676
                }else
677
                    s->mb_skipped=1;
678

    
679
                if(s->mb_skipped==1){
680
                    /* skip macroblock */
681
                    put_bits(&s->pb, 1, 1);
682

    
683
                    if(interleaved_stats){
684
                        s->misc_bits++;
685
                        s->last_bits++;
686
                    }
687
                    s->skip_count++;
688

    
689
                    return;
690
                }
691
            }
692

    
693
            put_bits(&s->pb, 1, 0);     /* mb coded */
694
            cbpc = cbp & 3;
695
            cbpy = cbp >> 2;
696
            cbpy ^= 0xf;
697
            if(s->mv_type==MV_TYPE_16X16){
698
                if(s->dquant) cbpc+= 8;
699
                put_bits(&s->pb,
700
                        ff_h263_inter_MCBPC_bits[cbpc],
701
                        ff_h263_inter_MCBPC_code[cbpc]);
702

    
703
                put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
704
                if(s->dquant)
705
                    put_bits(pb2, 2, dquant_code[s->dquant+2]);
706

    
707
                if(!s->progressive_sequence){
708
                    if(cbp)
709
                        put_bits(pb2, 1, s->interlaced_dct);
710
                    put_bits(pb2, 1, 0);
711
                }
712

    
713
                if(interleaved_stats){
714
                    s->misc_bits+= get_bits_diff(s);
715
                }
716

    
717
                /* motion vectors: 16x16 mode */
718
                h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
719

    
720
                ff_h263_encode_motion_vector(s, motion_x - pred_x,
721
                                                motion_y - pred_y, s->f_code);
722
            }else if(s->mv_type==MV_TYPE_FIELD){
723
                if(s->dquant) cbpc+= 8;
724
                put_bits(&s->pb,
725
                        ff_h263_inter_MCBPC_bits[cbpc],
726
                        ff_h263_inter_MCBPC_code[cbpc]);
727

    
728
                put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
729
                if(s->dquant)
730
                    put_bits(pb2, 2, dquant_code[s->dquant+2]);
731

    
732
                assert(!s->progressive_sequence);
733
                if(cbp)
734
                    put_bits(pb2, 1, s->interlaced_dct);
735
                put_bits(pb2, 1, 1);
736

    
737
                if(interleaved_stats){
738
                    s->misc_bits+= get_bits_diff(s);
739
                }
740

    
741
                /* motion vectors: 16x8 interlaced mode */
742
                h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
743
                pred_y /=2;
744

    
745
                put_bits(&s->pb, 1, s->field_select[0][0]);
746
                put_bits(&s->pb, 1, s->field_select[0][1]);
747

    
748
                ff_h263_encode_motion_vector(s, s->mv[0][0][0] - pred_x,
749
                                                s->mv[0][0][1] - pred_y, s->f_code);
750
                ff_h263_encode_motion_vector(s, s->mv[0][1][0] - pred_x,
751
                                                s->mv[0][1][1] - pred_y, s->f_code);
752
            }else{
753
                assert(s->mv_type==MV_TYPE_8X8);
754
                put_bits(&s->pb,
755
                        ff_h263_inter_MCBPC_bits[cbpc+16],
756
                        ff_h263_inter_MCBPC_code[cbpc+16]);
757
                put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
758

    
759
                if(!s->progressive_sequence){
760
                    if(cbp)
761
                        put_bits(pb2, 1, s->interlaced_dct);
762
                }
763

    
764
                if(interleaved_stats){
765
                    s->misc_bits+= get_bits_diff(s);
766
                }
767

    
768
                for(i=0; i<4; i++){
769
                    /* motion vectors: 8x8 mode*/
770
                    h263_pred_motion(s, i, 0, &pred_x, &pred_y);
771

    
772
                    ff_h263_encode_motion_vector(s, s->current_picture.motion_val[0][ s->block_index[i] ][0] - pred_x,
773
                                                    s->current_picture.motion_val[0][ s->block_index[i] ][1] - pred_y, s->f_code);
774
                }
775
            }
776

    
777
            if(interleaved_stats){
778
                s->mv_bits+= get_bits_diff(s);
779
            }
780

    
781
            mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
782

    
783
            if(interleaved_stats){
784
                s->p_tex_bits+= get_bits_diff(s);
785
            }
786
            s->f_count++;
787
        }
788
    } else {
789
        int cbp;
790
        int dc_diff[6];   //dc values with the dc prediction subtracted
791
        int dir[6];  //prediction direction
792
        int zigzag_last_index[6];
793
        uint8_t *scan_table[6];
794
        int i;
795

    
796
        for(i=0; i<6; i++){
797
            dc_diff[i]= ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
798
        }
799

    
800
        if(s->flags & CODEC_FLAG_AC_PRED){
801
            s->ac_pred= decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
802
        }else{
803
            for(i=0; i<6; i++)
804
                scan_table[i]= s->intra_scantable.permutated;
805
        }
806

    
807
        /* compute cbp */
808
        cbp = 0;
809
        for (i = 0; i < 6; i++) {
810
            if (s->block_last_index[i] >= 1)
811
                cbp |= 1 << (5 - i);
812
        }
813

    
814
        cbpc = cbp & 3;
815
        if (s->pict_type == FF_I_TYPE) {
816
            if(s->dquant) cbpc+=4;
817
            put_bits(&s->pb,
818
                ff_h263_intra_MCBPC_bits[cbpc],
819
                ff_h263_intra_MCBPC_code[cbpc]);
820
        } else {
821
            if(s->dquant) cbpc+=8;
822
            put_bits(&s->pb, 1, 0);     /* mb coded */
823
            put_bits(&s->pb,
824
                ff_h263_inter_MCBPC_bits[cbpc + 4],
825
                ff_h263_inter_MCBPC_code[cbpc + 4]);
826
        }
827
        put_bits(pb2, 1, s->ac_pred);
828
        cbpy = cbp >> 2;
829
        put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
830
        if(s->dquant)
831
            put_bits(dc_pb, 2, dquant_code[s->dquant+2]);
832

    
833
        if(!s->progressive_sequence){
834
            put_bits(dc_pb, 1, s->interlaced_dct);
835
        }
836

    
837
        if(interleaved_stats){
838
            s->misc_bits+= get_bits_diff(s);
839
        }
840

    
841
        mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
842

    
843
        if(interleaved_stats){
844
            s->i_tex_bits+= get_bits_diff(s);
845
        }
846
        s->i_count++;
847

    
848
        /* restore ac coeffs & last_index stuff if we messed them up with the prediction */
849
        if(s->ac_pred)
850
            restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
851
    }
852
}
853

    
854
/**
855
 * add mpeg4 stuffing bits (01...1)
856
 */
857
void ff_mpeg4_stuffing(PutBitContext * pbc)
858
{
859
    int length;
860
    put_bits(pbc, 1, 0);
861
    length= (-put_bits_count(pbc))&7;
862
    if(length) put_bits(pbc, length, (1<<length)-1);
863
}
864

    
865
/* must be called before writing the header */
866
void ff_set_mpeg4_time(MpegEncContext * s){
867
    if(s->pict_type==FF_B_TYPE){
868
        ff_mpeg4_init_direct_mv(s);
869
    }else{
870
        s->last_time_base= s->time_base;
871
        s->time_base= s->time/s->avctx->time_base.den;
872
    }
873
}
874

    
875
static void mpeg4_encode_gop_header(MpegEncContext * s){
876
    int hours, minutes, seconds;
877
    int64_t time;
878

    
879
    put_bits(&s->pb, 16, 0);
880
    put_bits(&s->pb, 16, GOP_STARTCODE);
881

    
882
    time= s->current_picture_ptr->pts;
883
    if(s->reordered_input_picture[1])
884
        time= FFMIN(time, s->reordered_input_picture[1]->pts);
885
    time= time*s->avctx->time_base.num;
886

    
887
    seconds= time/s->avctx->time_base.den;
888
    minutes= seconds/60; seconds %= 60;
889
    hours= minutes/60; minutes %= 60;
890
    hours%=24;
891

    
892
    put_bits(&s->pb, 5, hours);
893
    put_bits(&s->pb, 6, minutes);
894
    put_bits(&s->pb, 1, 1);
895
    put_bits(&s->pb, 6, seconds);
896

    
897
    put_bits(&s->pb, 1, !!(s->flags&CODEC_FLAG_CLOSED_GOP));
898
    put_bits(&s->pb, 1, 0); //broken link == NO
899

    
900
    s->last_time_base= time / s->avctx->time_base.den;
901

    
902
    ff_mpeg4_stuffing(&s->pb);
903
}
904

    
905
static void mpeg4_encode_visual_object_header(MpegEncContext * s){
906
    int profile_and_level_indication;
907
    int vo_ver_id;
908

    
909
    if(s->avctx->profile != FF_PROFILE_UNKNOWN){
910
        profile_and_level_indication = s->avctx->profile << 4;
911
    }else if(s->max_b_frames || s->quarter_sample){
912
        profile_and_level_indication= 0xF0; // adv simple
913
    }else{
914
        profile_and_level_indication= 0x00; // simple
915
    }
916

    
917
    if(s->avctx->level != FF_LEVEL_UNKNOWN){
918
        profile_and_level_indication |= s->avctx->level;
919
    }else{
920
        profile_and_level_indication |= 1; //level 1
921
    }
922

    
923
    if(profile_and_level_indication>>4 == 0xF){
924
        vo_ver_id= 5;
925
    }else{
926
        vo_ver_id= 1;
927
    }
928

    
929
    //FIXME levels
930

    
931
    put_bits(&s->pb, 16, 0);
932
    put_bits(&s->pb, 16, VOS_STARTCODE);
933

    
934
    put_bits(&s->pb, 8, profile_and_level_indication);
935

    
936
    put_bits(&s->pb, 16, 0);
937
    put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
938

    
939
    put_bits(&s->pb, 1, 1);
940
        put_bits(&s->pb, 4, vo_ver_id);
941
        put_bits(&s->pb, 3, 1); //priority
942

    
943
    put_bits(&s->pb, 4, 1); //visual obj type== video obj
944

    
945
    put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME
946

    
947
    ff_mpeg4_stuffing(&s->pb);
948
}
949

    
950
static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number)
951
{
952
    int vo_ver_id;
953

    
954
    if (!CONFIG_MPEG4_ENCODER)  return;
955

    
956
    if(s->max_b_frames || s->quarter_sample){
957
        vo_ver_id= 5;
958
        s->vo_type= ADV_SIMPLE_VO_TYPE;
959
    }else{
960
        vo_ver_id= 1;
961
        s->vo_type= SIMPLE_VO_TYPE;
962
    }
963

    
964
    put_bits(&s->pb, 16, 0);
965
    put_bits(&s->pb, 16, 0x100 + vo_number);        /* video obj */
966
    put_bits(&s->pb, 16, 0);
967
    put_bits(&s->pb, 16, 0x120 + vol_number);       /* video obj layer */
968

    
969
    put_bits(&s->pb, 1, 0);             /* random access vol */
970
    put_bits(&s->pb, 8, s->vo_type);    /* video obj type indication */
971
    if(s->workaround_bugs & FF_BUG_MS) {
972
        put_bits(&s->pb, 1, 0);         /* is obj layer id= no */
973
    } else {
974
        put_bits(&s->pb, 1, 1);         /* is obj layer id= yes */
975
        put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
976
        put_bits(&s->pb, 3, 1);         /* is obj layer priority */
977
    }
978

    
979
    s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
980

    
981
    put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */
982
    if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){
983
        put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
984
        put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
985
    }
986

    
987
    if(s->workaround_bugs & FF_BUG_MS) { //
988
        put_bits(&s->pb, 1, 0);         /* vol control parameters= no @@@ */
989
    } else {
990
        put_bits(&s->pb, 1, 1);         /* vol control parameters= yes */
991
        put_bits(&s->pb, 2, 1);         /* chroma format YUV 420/YV12 */
992
        put_bits(&s->pb, 1, s->low_delay);
993
        put_bits(&s->pb, 1, 0);         /* vbv parameters= no */
994
    }
995

    
996
    put_bits(&s->pb, 2, RECT_SHAPE);    /* vol shape= rectangle */
997
    put_bits(&s->pb, 1, 1);             /* marker bit */
998

    
999
    put_bits(&s->pb, 16, s->avctx->time_base.den);
1000
    if (s->time_increment_bits < 1)
1001
        s->time_increment_bits = 1;
1002
    put_bits(&s->pb, 1, 1);             /* marker bit */
1003
    put_bits(&s->pb, 1, 0);             /* fixed vop rate=no */
1004
    put_bits(&s->pb, 1, 1);             /* marker bit */
1005
    put_bits(&s->pb, 13, s->width);     /* vol width */
1006
    put_bits(&s->pb, 1, 1);             /* marker bit */
1007
    put_bits(&s->pb, 13, s->height);    /* vol height */
1008
    put_bits(&s->pb, 1, 1);             /* marker bit */
1009
    put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
1010
    put_bits(&s->pb, 1, 1);             /* obmc disable */
1011
    if (vo_ver_id == 1) {
1012
        put_bits(&s->pb, 1, s->vol_sprite_usage);       /* sprite enable */
1013
    }else{
1014
        put_bits(&s->pb, 2, s->vol_sprite_usage);       /* sprite enable */
1015
    }
1016

    
1017
    put_bits(&s->pb, 1, 0);             /* not 8 bit == false */
1018
    put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
1019

    
1020
    if(s->mpeg_quant){
1021
        ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
1022
        ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
1023
    }
1024

    
1025
    if (vo_ver_id != 1)
1026
        put_bits(&s->pb, 1, s->quarter_sample);
1027
    put_bits(&s->pb, 1, 1);             /* complexity estimation disable */
1028
    s->resync_marker= s->rtp_mode;
1029
    put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */
1030
    put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
1031
    if(s->data_partitioning){
1032
        put_bits(&s->pb, 1, 0);         /* no rvlc */
1033
    }
1034

    
1035
    if (vo_ver_id != 1){
1036
        put_bits(&s->pb, 1, 0);         /* newpred */
1037
        put_bits(&s->pb, 1, 0);         /* reduced res vop */
1038
    }
1039
    put_bits(&s->pb, 1, 0);             /* scalability */
1040

    
1041
    ff_mpeg4_stuffing(&s->pb);
1042

    
1043
    /* user data */
1044
    if(!(s->flags & CODEC_FLAG_BITEXACT)){
1045
        put_bits(&s->pb, 16, 0);
1046
        put_bits(&s->pb, 16, 0x1B2);    /* user_data */
1047
        ff_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
1048
    }
1049
}
1050

    
1051
/* write mpeg4 VOP header */
1052
void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
1053
{
1054
    int time_incr;
1055
    int time_div, time_mod;
1056

    
1057
    if(s->pict_type==FF_I_TYPE){
1058
        if(!(s->flags&CODEC_FLAG_GLOBAL_HEADER)){
1059
            if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) //HACK, the reference sw is buggy
1060
                mpeg4_encode_visual_object_header(s);
1061
            if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number==0) //HACK, the reference sw is buggy
1062
                mpeg4_encode_vol_header(s, 0, 0);
1063
        }
1064
        if(!(s->workaround_bugs & FF_BUG_MS))
1065
            mpeg4_encode_gop_header(s);
1066
    }
1067

    
1068
    s->partitioned_frame= s->data_partitioning && s->pict_type!=FF_B_TYPE;
1069

    
1070
    put_bits(&s->pb, 16, 0);                /* vop header */
1071
    put_bits(&s->pb, 16, VOP_STARTCODE);    /* vop header */
1072
    put_bits(&s->pb, 2, s->pict_type - 1);  /* pict type: I = 0 , P = 1 */
1073

    
1074
    assert(s->time>=0);
1075
    time_div= s->time/s->avctx->time_base.den;
1076
    time_mod= s->time%s->avctx->time_base.den;
1077
    time_incr= time_div - s->last_time_base;
1078
    assert(time_incr >= 0);
1079
    while(time_incr--)
1080
        put_bits(&s->pb, 1, 1);
1081

    
1082
    put_bits(&s->pb, 1, 0);
1083

    
1084
    put_bits(&s->pb, 1, 1);                             /* marker */
1085
    put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1086
    put_bits(&s->pb, 1, 1);                             /* marker */
1087
    put_bits(&s->pb, 1, 1);                             /* vop coded */
1088
    if (    s->pict_type == FF_P_TYPE
1089
        || (s->pict_type == FF_S_TYPE && s->vol_sprite_usage==GMC_SPRITE)) {
1090
        put_bits(&s->pb, 1, s->no_rounding);    /* rounding type */
1091
    }
1092
    put_bits(&s->pb, 3, 0);     /* intra dc VLC threshold */
1093
    if(!s->progressive_sequence){
1094
         put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
1095
         put_bits(&s->pb, 1, s->alternate_scan);
1096
    }
1097
    //FIXME sprite stuff
1098

    
1099
    put_bits(&s->pb, 5, s->qscale);
1100

    
1101
    if (s->pict_type != FF_I_TYPE)
1102
        put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1103
    if (s->pict_type == FF_B_TYPE)
1104
        put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1105
}
1106

    
1107

    
1108
static void init_uni_dc_tab(void)
1109
{
1110
    int level, uni_code, uni_len;
1111

    
1112
    for(level=-256; level<256; level++){
1113
        int size, v, l;
1114
        /* find number of bits */
1115
        size = 0;
1116
        v = abs(level);
1117
        while (v) {
1118
            v >>= 1;
1119
            size++;
1120
        }
1121

    
1122
        if (level < 0)
1123
            l= (-level) ^ ((1 << size) - 1);
1124
        else
1125
            l= level;
1126

    
1127
        /* luminance */
1128
        uni_code= ff_mpeg4_DCtab_lum[size][0];
1129
        uni_len = ff_mpeg4_DCtab_lum[size][1];
1130

    
1131
        if (size > 0) {
1132
            uni_code<<=size; uni_code|=l;
1133
            uni_len+=size;
1134
            if (size > 8){
1135
                uni_code<<=1; uni_code|=1;
1136
                uni_len++;
1137
            }
1138
        }
1139
        uni_DCtab_lum_bits[level+256]= uni_code;
1140
        uni_DCtab_lum_len [level+256]= uni_len;
1141

    
1142
        /* chrominance */
1143
        uni_code= ff_mpeg4_DCtab_chrom[size][0];
1144
        uni_len = ff_mpeg4_DCtab_chrom[size][1];
1145

    
1146
        if (size > 0) {
1147
            uni_code<<=size; uni_code|=l;
1148
            uni_len+=size;
1149
            if (size > 8){
1150
                uni_code<<=1; uni_code|=1;
1151
                uni_len++;
1152
            }
1153
        }
1154
        uni_DCtab_chrom_bits[level+256]= uni_code;
1155
        uni_DCtab_chrom_len [level+256]= uni_len;
1156

    
1157
    }
1158
}
1159

    
1160
static void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){
1161
    int slevel, run, last;
1162

    
1163
    assert(MAX_LEVEL >= 64);
1164
    assert(MAX_RUN   >= 63);
1165

    
1166
    for(slevel=-64; slevel<64; slevel++){
1167
        if(slevel==0) continue;
1168
        for(run=0; run<64; run++){
1169
            for(last=0; last<=1; last++){
1170
                const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64);
1171
                int level= slevel < 0 ? -slevel : slevel;
1172
                int sign= slevel < 0 ? 1 : 0;
1173
                int bits, len, code;
1174
                int level1, run1;
1175

    
1176
                len_tab[index]= 100;
1177

    
1178
                /* ESC0 */
1179
                code= get_rl_index(rl, last, run, level);
1180
                bits= rl->table_vlc[code][0];
1181
                len=  rl->table_vlc[code][1];
1182
                bits=bits*2+sign; len++;
1183

    
1184
                if(code!=rl->n && len < len_tab[index]){
1185
                    bits_tab[index]= bits;
1186
                    len_tab [index]= len;
1187
                }
1188
                /* ESC1 */
1189
                bits= rl->table_vlc[rl->n][0];
1190
                len=  rl->table_vlc[rl->n][1];
1191
                bits=bits*2;    len++; //esc1
1192
                level1= level - rl->max_level[last][run];
1193
                if(level1>0){
1194
                    code= get_rl_index(rl, last, run, level1);
1195
                    bits<<= rl->table_vlc[code][1];
1196
                    len  += rl->table_vlc[code][1];
1197
                    bits += rl->table_vlc[code][0];
1198
                    bits=bits*2+sign; len++;
1199

    
1200
                    if(code!=rl->n && len < len_tab[index]){
1201
                        bits_tab[index]= bits;
1202
                        len_tab [index]= len;
1203
                    }
1204
                }
1205
                /* ESC2 */
1206
                bits= rl->table_vlc[rl->n][0];
1207
                len=  rl->table_vlc[rl->n][1];
1208
                bits=bits*4+2;    len+=2; //esc2
1209
                run1 = run - rl->max_run[last][level] - 1;
1210
                if(run1>=0){
1211
                    code= get_rl_index(rl, last, run1, level);
1212
                    bits<<= rl->table_vlc[code][1];
1213
                    len  += rl->table_vlc[code][1];
1214
                    bits += rl->table_vlc[code][0];
1215
                    bits=bits*2+sign; len++;
1216

    
1217
                    if(code!=rl->n && len < len_tab[index]){
1218
                        bits_tab[index]= bits;
1219
                        len_tab [index]= len;
1220
                    }
1221
                }
1222
                /* ESC3 */
1223
                bits= rl->table_vlc[rl->n][0];
1224
                len = rl->table_vlc[rl->n][1];
1225
                bits=bits*4+3;    len+=2; //esc3
1226
                bits=bits*2+last; len++;
1227
                bits=bits*64+run; len+=6;
1228
                bits=bits*2+1;    len++;  //marker
1229
                bits=bits*4096+(slevel&0xfff); len+=12;
1230
                bits=bits*2+1;    len++;  //marker
1231

    
1232
                if(len < len_tab[index]){
1233
                    bits_tab[index]= bits;
1234
                    len_tab [index]= len;
1235
                }
1236
            }
1237
        }
1238
    }
1239
}
1240

    
1241
static av_cold int encode_init(AVCodecContext *avctx)
1242
{
1243
    MpegEncContext *s = avctx->priv_data;
1244
    int ret;
1245
    static int done = 0;
1246

    
1247
    if((ret=MPV_encode_init(avctx)) < 0)
1248
        return ret;
1249

    
1250
    if (!done) {
1251
        done = 1;
1252

    
1253
        init_uni_dc_tab();
1254

    
1255
        init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
1256

    
1257
        init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
1258
        init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
1259
    }
1260

    
1261
    s->min_qcoeff= -2048;
1262
    s->max_qcoeff=  2047;
1263
    s->intra_ac_vlc_length     = uni_mpeg4_intra_rl_len;
1264
    s->intra_ac_vlc_last_length= uni_mpeg4_intra_rl_len + 128*64;
1265
    s->inter_ac_vlc_length     = uni_mpeg4_inter_rl_len;
1266
    s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64;
1267
    s->luma_dc_vlc_length= uni_DCtab_lum_len;
1268
    s->chroma_dc_vlc_length= uni_DCtab_chrom_len;
1269
    s->ac_esc_length= 7+2+1+6+1+12+1;
1270
    s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table;
1271
    s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
1272

    
1273
    if(s->flags & CODEC_FLAG_GLOBAL_HEADER){
1274

    
1275
        s->avctx->extradata= av_malloc(1024);
1276
        init_put_bits(&s->pb, s->avctx->extradata, 1024);
1277

    
1278
        if(!(s->workaround_bugs & FF_BUG_MS))
1279
            mpeg4_encode_visual_object_header(s);
1280
        mpeg4_encode_vol_header(s, 0, 0);
1281

    
1282
//            ff_mpeg4_stuffing(&s->pb); ?
1283
        flush_put_bits(&s->pb);
1284
        s->avctx->extradata_size= (put_bits_count(&s->pb)+7)>>3;
1285
    }
1286
    return 0;
1287
}
1288

    
1289
void ff_mpeg4_init_partitions(MpegEncContext *s)
1290
{
1291
    uint8_t *start= put_bits_ptr(&s->pb);
1292
    uint8_t *end= s->pb.buf_end;
1293
    int size= end - start;
1294
    int pb_size = (((intptr_t)start + size/3)&(~3)) - (intptr_t)start;
1295
    int tex_size= (size - 2*pb_size)&(~3);
1296

    
1297
    set_put_bits_buffer_size(&s->pb, pb_size);
1298
    init_put_bits(&s->tex_pb, start + pb_size           , tex_size);
1299
    init_put_bits(&s->pb2   , start + pb_size + tex_size, pb_size);
1300
}
1301

    
1302
void ff_mpeg4_merge_partitions(MpegEncContext *s)
1303
{
1304
    const int pb2_len   = put_bits_count(&s->pb2   );
1305
    const int tex_pb_len= put_bits_count(&s->tex_pb);
1306
    const int bits= put_bits_count(&s->pb);
1307

    
1308
    if(s->pict_type==FF_I_TYPE){
1309
        put_bits(&s->pb, 19, DC_MARKER);
1310
        s->misc_bits+=19 + pb2_len + bits - s->last_bits;
1311
        s->i_tex_bits+= tex_pb_len;
1312
    }else{
1313
        put_bits(&s->pb, 17, MOTION_MARKER);
1314
        s->misc_bits+=17 + pb2_len;
1315
        s->mv_bits+= bits - s->last_bits;
1316
        s->p_tex_bits+= tex_pb_len;
1317
    }
1318

    
1319
    flush_put_bits(&s->pb2);
1320
    flush_put_bits(&s->tex_pb);
1321

    
1322
    set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1323
    ff_copy_bits(&s->pb, s->pb2.buf   , pb2_len);
1324
    ff_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1325
    s->last_bits= put_bits_count(&s->pb);
1326
}
1327

    
1328

    
1329
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
1330
{
1331
    int mb_num_bits= av_log2(s->mb_num - 1) + 1;
1332

    
1333
    put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
1334
    put_bits(&s->pb, 1, 1);
1335

    
1336
    put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width);
1337
    put_bits(&s->pb, s->quant_precision, s->qscale);
1338
    put_bits(&s->pb, 1, 0); /* no HEC */
1339
}
1340

    
1341
AVCodec ff_mpeg4_encoder = {
1342
    "mpeg4",
1343
    AVMEDIA_TYPE_VIDEO,
1344
    CODEC_ID_MPEG4,
1345
    sizeof(MpegEncContext),
1346
    encode_init,
1347
    MPV_encode_picture,
1348
    MPV_encode_end,
1349
    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
1350
    .capabilities= CODEC_CAP_DELAY,
1351
    .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
1352
};