GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/mpeg4videoenc.c Lines: 617 784 78.7 %
Date: 2019-11-18 18:00:01 Branches: 301 438 68.7 %

Line Branch Exec Source
1
/*
2
 * MPEG-4 encoder
3
 * Copyright (c) 2000,2001 Fabrice Bellard
4
 * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
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
#include "libavutil/attributes.h"
24
#include "libavutil/log.h"
25
#include "libavutil/opt.h"
26
#include "mpegutils.h"
27
#include "mpegvideo.h"
28
#include "h263.h"
29
#include "mpeg4video.h"
30
31
/* The uni_DCtab_* tables below contain unified bits+length tables to encode DC
32
 * differences in MPEG-4. Unified in the sense that the specification specifies
33
 * this encoding in several steps. */
34
static uint8_t  uni_DCtab_lum_len[512];
35
static uint8_t  uni_DCtab_chrom_len[512];
36
static uint16_t uni_DCtab_lum_bits[512];
37
static uint16_t uni_DCtab_chrom_bits[512];
38
39
/* Unified encoding tables for run length encoding of coefficients.
40
 * Unified in the sense that the specification specifies the encoding in several steps. */
41
static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2];
42
static uint8_t  uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2];
43
static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2];
44
static uint8_t  uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2];
45
46
//#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level))
47
//#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64)
48
#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level))
49
50
/* MPEG-4
51
 * inter
52
 * max level: 24/6
53
 * max run: 53/63
54
 *
55
 * intra
56
 * max level: 53/16
57
 * max run: 29/41
58
 */
59
60
/**
61
 * Return the number of bits that encoding the 8x8 block in block would need.
62
 * @param[in]  block_last_index last index in scantable order that refers to a non zero element in block.
63
 */
64
585288
static inline int get_block_rate(MpegEncContext *s, int16_t block[64],
65
                                 int block_last_index, uint8_t scantable[64])
66
{
67
585288
    int last = 0;
68
    int j;
69
585288
    int rate = 0;
70
71
12547868
    for (j = 1; j <= block_last_index; j++) {
72
11962580
        const int index = scantable[j];
73
11962580
        int level = block[index];
74
11962580
        if (level) {
75
5655201
            level += 64;
76
5655201
            if ((level & (~127)) == 0) {
77
5653593
                if (j < block_last_index)
78
5215921
                    rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
79
                else
80
437672
                    rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
81
            } else
82
1608
                rate += s->ac_esc_length;
83
84
5655201
            last = j;
85
        }
86
    }
87
88
585288
    return rate;
89
}
90
91
/**
92
 * Restore the ac coefficients in block that have been changed by decide_ac_pred().
93
 * This function also restores s->block_last_index.
94
 * @param[in,out] block MB coefficients, these will be restored
95
 * @param[in] dir ac prediction direction for each 8x8 block
96
 * @param[out] st scantable for each 8x8 block
97
 * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order
98
 */
99
48774
static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64],
100
                                     const int dir[6], uint8_t *st[6],
101
                                     const int zigzag_last_index[6])
102
{
103
    int i, n;
104
48774
    memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6);
105
106
341418
    for (n = 0; n < 6; n++) {
107
292644
        int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
108
109
292644
        st[n] = s->intra_scantable.permutated;
110
292644
        if (dir[n]) {
111
            /* top prediction */
112
641160
            for (i = 1; i < 8; i++)
113
561015
                block[n][s->idsp.idct_permutation[i]] = ac_val[i + 8];
114
        } else {
115
            /* left prediction */
116
1699992
            for (i = 1; i < 8; i++)
117
1487493
                block[n][s->idsp.idct_permutation[i << 3]] = ac_val[i];
118
        }
119
    }
120
48774
}
121
122
/**
123
 * Return the optimal value (0 or 1) for the ac_pred element for the given MB in MPEG-4.
124
 * This function will also update s->block_last_index and s->ac_val.
125
 * @param[in,out] block MB coefficients, these will be updated if 1 is returned
126
 * @param[in] dir ac prediction direction for each 8x8 block
127
 * @param[out] st scantable for each 8x8 block
128
 * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order
129
 */
130
48774
static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64],
131
                                 const int dir[6], uint8_t *st[6],
132
                                 int zigzag_last_index[6])
133
{
134
48774
    int score = 0;
135
    int i, n;
136
48774
    int8_t *const qscale_table = s->current_picture.qscale_table;
137
138
48774
    memcpy(zigzag_last_index, s->block_last_index, sizeof(int) * 6);
139
140
341418
    for (n = 0; n < 6; n++) {
141
        int16_t *ac_val, *ac_val1;
142
143
585288
        score -= get_block_rate(s, block[n], s->block_last_index[n],
144
292644
                                s->intra_scantable.permutated);
145
146
292644
        ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;
147
292644
        ac_val1 = ac_val;
148
292644
        if (dir[n]) {
149
80145
            const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride;
150
            /* top prediction */
151
80145
            ac_val -= s->block_wrap[n] * 16;
152


80145
            if (s->mb_y == 0 || s->qscale == qscale_table[xy] || n == 2 || n == 3) {
153
                /* same qscale */
154
641160
                for (i = 1; i < 8; i++) {
155
561015
                    const int level = block[n][s->idsp.idct_permutation[i]];
156
561015
                    block[n][s->idsp.idct_permutation[i]] = level - ac_val[i + 8];
157
561015
                    ac_val1[i]     = block[n][s->idsp.idct_permutation[i << 3]];
158
561015
                    ac_val1[i + 8] = level;
159
                }
160
            } else {
161
                /* different qscale, we must rescale */
162
                for (i = 1; i < 8; i++) {
163
                    const int level = block[n][s->idsp.idct_permutation[i]];
164
                    block[n][s->idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale);
165
                    ac_val1[i]     = block[n][s->idsp.idct_permutation[i << 3]];
166
                    ac_val1[i + 8] = level;
167
                }
168
            }
169
80145
            st[n] = s->intra_h_scantable.permutated;
170
        } else {
171
212499
            const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride;
172
            /* left prediction */
173
212499
            ac_val -= 16;
174


212499
            if (s->mb_x == 0 || s->qscale == qscale_table[xy] || n == 1 || n == 3) {
175
                /* same qscale */
176
1699992
                for (i = 1; i < 8; i++) {
177
1487493
                    const int level = block[n][s->idsp.idct_permutation[i << 3]];
178
1487493
                    block[n][s->idsp.idct_permutation[i << 3]] = level - ac_val[i];
179
1487493
                    ac_val1[i]     = level;
180
1487493
                    ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
181
                }
182
            } else {
183
                /* different qscale, we must rescale */
184
                for (i = 1; i < 8; i++) {
185
                    const int level = block[n][s->idsp.idct_permutation[i << 3]];
186
                    block[n][s->idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale);
187
                    ac_val1[i]     = level;
188
                    ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
189
                }
190
            }
191
212499
            st[n] = s->intra_v_scantable.permutated;
192
        }
193
194
12538840
        for (i = 63; i > 0; i--)  // FIXME optimize
195
12470313
            if (block[n][st[n][i]])
196
224117
                break;
197
292644
        s->block_last_index[n] = i;
198
199
292644
        score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
200
    }
201
202
48774
    if (score < 0) {
203
7332
        return 1;
204
    } else {
205
41442
        restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
206
41442
        return 0;
207
    }
208
}
209
210
/**
211
 * modify mb_type & qscale so that encoding is actually possible in MPEG-4
212
 */
213
400
void ff_clean_mpeg4_qscales(MpegEncContext *s)
214
{
215
    int i;
216
400
    int8_t *const qscale_table = s->current_picture.qscale_table;
217
218
400
    ff_clean_h263_qscales(s);
219
220
400
    if (s->pict_type == AV_PICTURE_TYPE_B) {
221
256
        int odd = 0;
222
        /* ok, come on, this isn't funny anymore, there's more code for
223
         * handling this MPEG-4 mess than for the actual adaptive quantization */
224
225
76864
        for (i = 0; i < s->mb_num; i++) {
226
76608
            int mb_xy = s->mb_index2xy[i];
227
76608
            odd += qscale_table[mb_xy] & 1;
228
        }
229
230
256
        if (2 * odd > s->mb_num)
231
143
            odd = 1;
232
        else
233
113
            odd = 0;
234
235
76864
        for (i = 0; i < s->mb_num; i++) {
236
76608
            int mb_xy = s->mb_index2xy[i];
237
76608
            if ((qscale_table[mb_xy] & 1) != odd)
238
10413
                qscale_table[mb_xy]++;
239
76608
            if (qscale_table[mb_xy] > 31)
240
                qscale_table[mb_xy] = 31;
241
        }
242
243
76608
        for (i = 1; i < s->mb_num; i++) {
244
76352
            int mb_xy = s->mb_index2xy[i];
245
76352
            if (qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i - 1]] &&
246
13926
                (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) {
247
13915
                s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR;
248
            }
249
        }
250
    }
251
400
}
252
253
/**
254
 * Encode the dc value.
255
 * @param n block index (0-3 are luma, 4-5 are chroma)
256
 */
257
1205160
static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n)
258
{
259
    /* DC will overflow if level is outside the [-255,255] range. */
260
1205160
    level += 256;
261
1205160
    if (n < 4) {
262
        /* luminance */
263
803440
        put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
264
    } else {
265
        /* chrominance */
266
401720
        put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
267
    }
268
1205160
}
269
270
static inline int mpeg4_get_dc_length(int level, int n)
271
{
272
    if (n < 4)
273
        return uni_DCtab_lum_len[level + 256];
274
    else
275
        return uni_DCtab_chrom_len[level + 256];
276
}
277
278
/**
279
 * Encode an 8x8 block.
280
 * @param n block index (0-3 are luma, 4-5 are chroma)
281
 */
282
10110834
static inline void mpeg4_encode_block(MpegEncContext *s,
283
                                      int16_t *block, int n, int intra_dc,
284
                                      uint8_t *scan_table, PutBitContext *dc_pb,
285
                                      PutBitContext *ac_pb)
286
{
287
    int i, last_non_zero;
288
    uint32_t *bits_tab;
289
    uint8_t *len_tab;
290
10110834
    const int last_index = s->block_last_index[n];
291
292
10110834
    if (s->mb_intra) {  // Note gcc (3.2.1 at least) will optimize this away
293
        /* MPEG-4 based DC predictor */
294
1205160
        mpeg4_encode_dc(dc_pb, intra_dc, n);
295
1205160
        if (last_index < 1)
296
279085
            return;
297
926075
        i = 1;
298
926075
        bits_tab = uni_mpeg4_intra_rl_bits;
299
926075
        len_tab  = uni_mpeg4_intra_rl_len;
300
    } else {
301
8905674
        if (last_index < 0)
302
5123090
            return;
303
3782584
        i = 0;
304
3782584
        bits_tab = uni_mpeg4_inter_rl_bits;
305
3782584
        len_tab  = uni_mpeg4_inter_rl_len;
306
    }
307
308
    /* AC coefs */
309
4708659
    last_non_zero = i - 1;
310
131763528
    for (; i < last_index; i++) {
311
127054869
        int level = block[scan_table[i]];
312
127054869
        if (level) {
313
42037994
            int run = i - last_non_zero - 1;
314
42037994
            level += 64;
315
42037994
            if ((level & (~127)) == 0) {
316
42020003
                const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
317
42020003
                put_bits(ac_pb, len_tab[index], bits_tab[index]);
318
            } else {  // ESC3
319
17991
                put_bits(ac_pb,
320
                         7 + 2 + 1 + 6 + 1 + 12 + 1,
321
17991
                         (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) +
322
17991
                         (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
323
            }
324
42037994
            last_non_zero = i;
325
        }
326
    }
327
    /* if (i <= last_index) */ {
328
4708659
        int level = block[scan_table[i]];
329
4708659
        int run   = i - last_non_zero - 1;
330
4708659
        level += 64;
331
4708659
        if ((level & (~127)) == 0) {
332
4708252
            const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
333
4708252
            put_bits(ac_pb, len_tab[index], bits_tab[index]);
334
        } else {  // ESC3
335
407
            put_bits(ac_pb,
336
                     7 + 2 + 1 + 6 + 1 + 12 + 1,
337
407
                     (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) +
338
407
                     (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
339
        }
340
    }
341
}
342
343
static int mpeg4_get_block_length(MpegEncContext *s,
344
                                  int16_t *block, int n,
345
                                  int intra_dc, uint8_t *scan_table)
346
{
347
    int i, last_non_zero;
348
    uint8_t *len_tab;
349
    const int last_index = s->block_last_index[n];
350
    int len = 0;
351
352
    if (s->mb_intra) {  // Note gcc (3.2.1 at least) will optimize this away
353
        /* MPEG-4 based DC predictor */
354
        len += mpeg4_get_dc_length(intra_dc, n);
355
        if (last_index < 1)
356
            return len;
357
        i = 1;
358
        len_tab = uni_mpeg4_intra_rl_len;
359
    } else {
360
        if (last_index < 0)
361
            return 0;
362
        i = 0;
363
        len_tab = uni_mpeg4_inter_rl_len;
364
    }
365
366
    /* AC coefs */
367
    last_non_zero = i - 1;
368
    for (; i < last_index; i++) {
369
        int level = block[scan_table[i]];
370
        if (level) {
371
            int run = i - last_non_zero - 1;
372
            level += 64;
373
            if ((level & (~127)) == 0) {
374
                const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
375
                len += len_tab[index];
376
            } else {  // ESC3
377
                len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
378
            }
379
            last_non_zero = i;
380
        }
381
    }
382
    /* if (i <= last_index) */ {
383
        int level = block[scan_table[i]];
384
        int run   = i - last_non_zero - 1;
385
        level += 64;
386
        if ((level & (~127)) == 0) {
387
            const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
388
            len += len_tab[index];
389
        } else {  // ESC3
390
            len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
391
        }
392
    }
393
394
    return len;
395
}
396
397
1685139
static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64],
398
                                       int intra_dc[6], uint8_t **scan_table,
399
                                       PutBitContext *dc_pb,
400
                                       PutBitContext *ac_pb)
401
{
402
    int i;
403
404
1685139
    if (scan_table) {
405
200860
        if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) {
406
            for (i = 0; i < 6; i++)
407
                skip_put_bits(&s->pb,
408
                              mpeg4_get_block_length(s, block[i], i,
409
                                                     intra_dc[i], scan_table[i]));
410
        } else {
411
            /* encode each block */
412
1406020
            for (i = 0; i < 6; i++)
413
1205160
                mpeg4_encode_block(s, block[i], i,
414
1205160
                                   intra_dc[i], scan_table[i], dc_pb, ac_pb);
415
        }
416
    } else {
417
1484279
        if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) {
418
            for (i = 0; i < 6; i++)
419
                skip_put_bits(&s->pb,
420
                              mpeg4_get_block_length(s, block[i], i, 0,
421
                                                     s->intra_scantable.permutated));
422
        } else {
423
            /* encode each block */
424
10389953
            for (i = 0; i < 6; i++)
425
8905674
                mpeg4_encode_block(s, block[i], i, 0,
426
8905674
                                   s->intra_scantable.permutated, dc_pb, ac_pb);
427
        }
428
    }
429
1685139
}
430
431
765962
static inline int get_b_cbp(MpegEncContext *s, int16_t block[6][64],
432
                            int motion_x, int motion_y, int mb_type)
433
{
434
765962
    int cbp = 0, i;
435
436
765962
    if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
437
        int score        = 0;
438
        const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
439
440
        for (i = 0; i < 6; i++) {
441
            if (s->coded_score[i] < 0) {
442
                score += s->coded_score[i];
443
                cbp   |= 1 << (5 - i);
444
            }
445
        }
446
447
        if (cbp) {
448
            int zero_score = -6;
449
            if ((motion_x | motion_y | s->dquant | mb_type) == 0)
450
                zero_score -= 4;  // 2 * MV + mb_type + cbp bit
451
452
            zero_score *= lambda;
453
            if (zero_score <= score)
454
                cbp = 0;
455
        }
456
457
        for (i = 0; i < 6; i++) {
458
            if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
459
                s->block_last_index[i] = -1;
460
                s->bdsp.clear_block(s->block[i]);
461
            }
462
        }
463
    } else {
464
5361734
        for (i = 0; i < 6; i++) {
465
4595772
            if (s->block_last_index[i] >= 0)
466
1642053
                cbp |= 1 << (5 - i);
467
        }
468
    }
469
765962
    return cbp;
470
}
471
472
// FIXME this is duplicated to h263.c
473
static const int dquant_code[5] = { 1, 0, 9, 2, 3 };
474
475
1750611
void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64],
476
                        int motion_x, int motion_y)
477
{
478
    int cbpc, cbpy, pred_x, pred_y;
479
1750611
    PutBitContext *const pb2    = s->data_partitioning ? &s->pb2 : &s->pb;
480

1750611
    PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
481

1750611
    PutBitContext *const dc_pb  = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
482

1750611
    const int interleaved_stats = (s->avctx->flags & AV_CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
483
484
1750611
    if (!s->mb_intra) {
485
        int i, cbp;
486
487
1549751
        if (s->pict_type == AV_PICTURE_TYPE_B) {
488
            /* convert from mv_dir to type */
489
            static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 };
490
766080
            int mb_type = mb_type_table[s->mv_dir];
491
492
766080
            if (s->mb_x == 0) {
493
110403
                for (i = 0; i < 2; i++)
494
73602
                    s->last_mv[i][0][0] =
495
73602
                    s->last_mv[i][0][1] =
496
73602
                    s->last_mv[i][1][0] =
497
73602
                    s->last_mv[i][1][1] = 0;
498
            }
499
500
            av_assert2(s->dquant >= -2 && s->dquant <= 2);
501
            av_assert2((s->dquant & 1) == 0);
502
            av_assert2(mb_type >= 0);
503
504
            /* nothing to do if this MB was skipped in the next P-frame */
505
766080
            if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) {  // FIXME avoid DCT & ...
506
118
                s->skip_count++;
507
118
                s->mv[0][0][0] =
508
118
                s->mv[0][0][1] =
509
118
                s->mv[1][0][0] =
510
118
                s->mv[1][0][1] = 0;
511
118
                s->mv_dir  = MV_DIR_FORWARD;  // doesn't matter
512
118
                s->qscale -= s->dquant;
513
//                s->mb_skipped = 1;
514
515
65472
                return;
516
            }
517
518
765962
            cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type);
519
520
765962
            if ((cbp | motion_x | motion_y | mb_type) == 0) {
521
                /* direct MB with MV={0,0} */
522
                av_assert2(s->dquant == 0);
523
524
44007
                put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
525
526
44007
                if (interleaved_stats) {
527
                    s->misc_bits++;
528
                    s->last_bits++;
529
                }
530
44007
                s->skip_count++;
531
44007
                return;
532
            }
533
534
721955
            put_bits(&s->pb, 1, 0);            /* mb coded modb1=0 */
535
721955
            put_bits(&s->pb, 1, cbp ? 0 : 1);  /* modb2 */ // FIXME merge
536
721955
            put_bits(&s->pb, mb_type + 1, 1);  // this table is so simple that we don't need it :)
537
721955
            if (cbp)
538
480909
                put_bits(&s->pb, 6, cbp);
539
540

721955
            if (cbp && mb_type) {
541
333101
                if (s->dquant)
542
41971
                    put_bits(&s->pb, 2, (s->dquant >> 2) + 3);
543
                else
544
291130
                    put_bits(&s->pb, 1, 0);
545
            } else
546
388854
                s->qscale -= s->dquant;
547
548
721955
            if (!s->progressive_sequence) {
549
                if (cbp)
550
                    put_bits(&s->pb, 1, s->interlaced_dct);
551
                if (mb_type)                  // not direct mode
552
                    put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
553
            }
554
555
721955
            if (interleaved_stats)
556
                s->misc_bits += get_bits_diff(s);
557
558
721955
            if (!mb_type) {
559
                av_assert2(s->mv_dir & MV_DIRECT);
560
172311
                ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
561
172311
                s->b_count++;
562
172311
                s->f_count++;
563
            } else {
564
                av_assert2(mb_type > 0 && mb_type < 4);
565
549644
                if (s->mv_type != MV_TYPE_FIELD) {
566
549644
                    if (s->mv_dir & MV_DIR_FORWARD) {
567
372400
                        ff_h263_encode_motion_vector(s,
568
372400
                                                     s->mv[0][0][0] - s->last_mv[0][0][0],
569
372400
                                                     s->mv[0][0][1] - s->last_mv[0][0][1],
570
                                                     s->f_code);
571
372400
                        s->last_mv[0][0][0] =
572
372400
                        s->last_mv[0][1][0] = s->mv[0][0][0];
573
372400
                        s->last_mv[0][0][1] =
574
372400
                        s->last_mv[0][1][1] = s->mv[0][0][1];
575
372400
                        s->f_count++;
576
                    }
577
549644
                    if (s->mv_dir & MV_DIR_BACKWARD) {
578
375855
                        ff_h263_encode_motion_vector(s,
579
375855
                                                     s->mv[1][0][0] - s->last_mv[1][0][0],
580
375855
                                                     s->mv[1][0][1] - s->last_mv[1][0][1],
581
                                                     s->b_code);
582
375855
                        s->last_mv[1][0][0] =
583
375855
                        s->last_mv[1][1][0] = s->mv[1][0][0];
584
375855
                        s->last_mv[1][0][1] =
585
375855
                        s->last_mv[1][1][1] = s->mv[1][0][1];
586
375855
                        s->b_count++;
587
                    }
588
                } else {
589
                    if (s->mv_dir & MV_DIR_FORWARD) {
590
                        put_bits(&s->pb, 1, s->field_select[0][0]);
591
                        put_bits(&s->pb, 1, s->field_select[0][1]);
592
                    }
593
                    if (s->mv_dir & MV_DIR_BACKWARD) {
594
                        put_bits(&s->pb, 1, s->field_select[1][0]);
595
                        put_bits(&s->pb, 1, s->field_select[1][1]);
596
                    }
597
                    if (s->mv_dir & MV_DIR_FORWARD) {
598
                        for (i = 0; i < 2; i++) {
599
                            ff_h263_encode_motion_vector(s,
600
                                                         s->mv[0][i][0] - s->last_mv[0][i][0],
601
                                                         s->mv[0][i][1] - s->last_mv[0][i][1] / 2,
602
                                                         s->f_code);
603
                            s->last_mv[0][i][0] = s->mv[0][i][0];
604
                            s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
605
                        }
606
                        s->f_count++;
607
                    }
608
                    if (s->mv_dir & MV_DIR_BACKWARD) {
609
                        for (i = 0; i < 2; i++) {
610
                            ff_h263_encode_motion_vector(s,
611
                                                         s->mv[1][i][0] - s->last_mv[1][i][0],
612
                                                         s->mv[1][i][1] - s->last_mv[1][i][1] / 2,
613
                                                         s->b_code);
614
                            s->last_mv[1][i][0] = s->mv[1][i][0];
615
                            s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
616
                        }
617
                        s->b_count++;
618
                    }
619
                }
620
            }
621
622
721955
            if (interleaved_stats)
623
                s->mv_bits += get_bits_diff(s);
624
625
721955
            mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
626
627
721955
            if (interleaved_stats)
628
                s->p_tex_bits += get_bits_diff(s);
629
        } else { /* s->pict_type==AV_PICTURE_TYPE_B */
630
783671
            cbp = get_p_cbp(s, block, motion_x, motion_y);
631
632
783671
            if ((cbp | motion_x | motion_y | s->dquant) == 0 &&
633
50598
                s->mv_type == MV_TYPE_16X16) {
634
                /* Check if the B-frames can skip it too, as we must skip it
635
                 * if we skip here why didn't they just compress
636
                 * the skip-mb bits instead of reusing them ?! */
637
21667
                if (s->max_b_frames > 0) {
638
                    int i;
639
                    int x, y, offset;
640
                    uint8_t *p_pic;
641
642
686
                    x = s->mb_x * 16;
643
686
                    y = s->mb_y * 16;
644
645
686
                    offset = x + y * s->linesize;
646
686
                    p_pic  = s->new_picture.f->data[0] + offset;
647
648
686
                    s->mb_skipped = 1;
649
858
                    for (i = 0; i < s->max_b_frames; i++) {
650
                        uint8_t *b_pic;
651
                        int diff;
652
772
                        Picture *pic = s->reordered_input_picture[i + 1];
653
654

772
                        if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B)
655
                            break;
656
657
492
                        b_pic = pic->f->data[0] + offset;
658
492
                        if (!pic->shared)
659
492
                            b_pic += INPLACE_OFFSET;
660
661

492
                        if (x + 16 > s->width || y + 16 > s->height) {
662
                            int x1, y1;
663
                            int xe = FFMIN(16, s->width - x);
664
                            int ye = FFMIN(16, s->height - y);
665
                            diff = 0;
666
                            for (y1 = 0; y1 < ye; y1++) {
667
                                for (x1 = 0; x1 < xe; x1++) {
668
                                    diff += FFABS(p_pic[x1 + y1 * s->linesize] - b_pic[x1 + y1 * s->linesize]);
669
                                }
670
                            }
671
                            diff = diff * 256 / (xe * ye);
672
                        } else {
673
492
                            diff = s->mecc.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
674
                        }
675
492
                        if (diff > s->qscale * 70) {  // FIXME check that 70 is optimal
676
320
                            s->mb_skipped = 0;
677
320
                            break;
678
                        }
679
                    }
680
                } else
681
20981
                    s->mb_skipped = 1;
682
683
21667
                if (s->mb_skipped == 1) {
684
                    /* skip macroblock */
685
21347
                    put_bits(&s->pb, 1, 1);
686
687
21347
                    if (interleaved_stats) {
688
                        s->misc_bits++;
689
                        s->last_bits++;
690
                    }
691
21347
                    s->skip_count++;
692
693
21347
                    return;
694
                }
695
            }
696
697
762324
            put_bits(&s->pb, 1, 0);     /* mb coded */
698
762324
            cbpc  = cbp & 3;
699
762324
            cbpy  = cbp >> 2;
700
762324
            cbpy ^= 0xf;
701
762324
            if (s->mv_type == MV_TYPE_16X16) {
702
553114
                if (s->dquant)
703
43645
                    cbpc += 8;
704
553114
                put_bits(&s->pb,
705
553114
                         ff_h263_inter_MCBPC_bits[cbpc],
706
553114
                         ff_h263_inter_MCBPC_code[cbpc]);
707
708
553114
                put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
709
553114
                if (s->dquant)
710
43645
                    put_bits(pb2, 2, dquant_code[s->dquant + 2]);
711
712
553114
                if (!s->progressive_sequence) {
713
                    if (cbp)
714
                        put_bits(pb2, 1, s->interlaced_dct);
715
                    put_bits(pb2, 1, 0);
716
                }
717
718
553114
                if (interleaved_stats)
719
                    s->misc_bits += get_bits_diff(s);
720
721
                /* motion vectors: 16x16 mode */
722
553114
                ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
723
724
553114
                ff_h263_encode_motion_vector(s,
725
                                             motion_x - pred_x,
726
                                             motion_y - pred_y,
727
                                             s->f_code);
728
209210
            } else if (s->mv_type == MV_TYPE_FIELD) {
729
                if (s->dquant)
730
                    cbpc += 8;
731
                put_bits(&s->pb,
732
                         ff_h263_inter_MCBPC_bits[cbpc],
733
                         ff_h263_inter_MCBPC_code[cbpc]);
734
735
                put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
736
                if (s->dquant)
737
                    put_bits(pb2, 2, dquant_code[s->dquant + 2]);
738
739
                av_assert2(!s->progressive_sequence);
740
                if (cbp)
741
                    put_bits(pb2, 1, s->interlaced_dct);
742
                put_bits(pb2, 1, 1);
743
744
                if (interleaved_stats)
745
                    s->misc_bits += get_bits_diff(s);
746
747
                /* motion vectors: 16x8 interlaced mode */
748
                ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
749
                pred_y /= 2;
750
751
                put_bits(&s->pb, 1, s->field_select[0][0]);
752
                put_bits(&s->pb, 1, s->field_select[0][1]);
753
754
                ff_h263_encode_motion_vector(s,
755
                                             s->mv[0][0][0] - pred_x,
756
                                             s->mv[0][0][1] - pred_y,
757
                                             s->f_code);
758
                ff_h263_encode_motion_vector(s,
759
                                             s->mv[0][1][0] - pred_x,
760
                                             s->mv[0][1][1] - pred_y,
761
                                             s->f_code);
762
            } else {
763
                av_assert2(s->mv_type == MV_TYPE_8X8);
764
209210
                put_bits(&s->pb,
765
209210
                         ff_h263_inter_MCBPC_bits[cbpc + 16],
766
209210
                         ff_h263_inter_MCBPC_code[cbpc + 16]);
767
209210
                put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
768
769

209210
                if (!s->progressive_sequence && cbp)
770
                    put_bits(pb2, 1, s->interlaced_dct);
771
772
209210
                if (interleaved_stats)
773
                    s->misc_bits += get_bits_diff(s);
774
775
1046050
                for (i = 0; i < 4; i++) {
776
                    /* motion vectors: 8x8 mode*/
777
836840
                    ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
778
779
836840
                    ff_h263_encode_motion_vector(s,
780
836840
                                                 s->current_picture.motion_val[0][s->block_index[i]][0] - pred_x,
781
836840
                                                 s->current_picture.motion_val[0][s->block_index[i]][1] - pred_y,
782
                                                 s->f_code);
783
                }
784
            }
785
786
762324
            if (interleaved_stats)
787
                s->mv_bits += get_bits_diff(s);
788
789
762324
            mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
790
791
762324
            if (interleaved_stats)
792
                s->p_tex_bits += get_bits_diff(s);
793
794
762324
            s->f_count++;
795
        }
796
    } else {
797
        int cbp;
798
        int dc_diff[6];  // dc values with the dc prediction subtracted
799
        int dir[6];      // prediction direction
800
        int zigzag_last_index[6];
801
        uint8_t *scan_table[6];
802
        int i;
803
804
1406020
        for (i = 0; i < 6; i++)
805
1205160
            dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
806
807
200860
        if (s->avctx->flags & AV_CODEC_FLAG_AC_PRED) {
808
48774
            s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
809
        } else {
810
1064602
            for (i = 0; i < 6; i++)
811
912516
                scan_table[i] = s->intra_scantable.permutated;
812
        }
813
814
        /* compute cbp */
815
200860
        cbp = 0;
816
1406020
        for (i = 0; i < 6; i++)
817
1205160
            if (s->block_last_index[i] >= 1)
818
926075
                cbp |= 1 << (5 - i);
819
820
200860
        cbpc = cbp & 3;
821
200860
        if (s->pict_type == AV_PICTURE_TYPE_I) {
822
106386
            if (s->dquant)
823
26002
                cbpc += 4;
824
106386
            put_bits(&s->pb,
825
106386
                     ff_h263_intra_MCBPC_bits[cbpc],
826
106386
                     ff_h263_intra_MCBPC_code[cbpc]);
827
        } else {
828
94474
            if (s->dquant)
829
5678
                cbpc += 8;
830
94474
            put_bits(&s->pb, 1, 0);     /* mb coded */
831
94474
            put_bits(&s->pb,
832
94474
                     ff_h263_inter_MCBPC_bits[cbpc + 4],
833
94474
                     ff_h263_inter_MCBPC_code[cbpc + 4]);
834
        }
835
200860
        put_bits(pb2, 1, s->ac_pred);
836
200860
        cbpy = cbp >> 2;
837
200860
        put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
838
200860
        if (s->dquant)
839
31680
            put_bits(dc_pb, 2, dquant_code[s->dquant + 2]);
840
841
200860
        if (!s->progressive_sequence)
842
            put_bits(dc_pb, 1, s->interlaced_dct);
843
844
200860
        if (interleaved_stats)
845
            s->misc_bits += get_bits_diff(s);
846
847
200860
        mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
848
849
200860
        if (interleaved_stats)
850
            s->i_tex_bits += get_bits_diff(s);
851
200860
        s->i_count++;
852
853
        /* restore ac coeffs & last_index stuff
854
         * if we messed them up with the prediction */
855
200860
        if (s->ac_pred)
856
7332
            restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
857
    }
858
}
859
860
/**
861
 * add MPEG-4 stuffing bits (01...1)
862
 */
863
6494
void ff_mpeg4_stuffing(PutBitContext *pbc)
864
{
865
    int length;
866
6494
    put_bits(pbc, 1, 0);
867
6494
    length = (-put_bits_count(pbc)) & 7;
868
6494
    if (length)
869
5819
        put_bits(pbc, length, (1 << length) - 1);
870
6494
}
871
872
/* must be called before writing the header */
873
2490
void ff_set_mpeg4_time(MpegEncContext *s)
874
{
875
2490
    if (s->pict_type == AV_PICTURE_TYPE_B) {
876
640
        ff_mpeg4_init_direct_mv(s);
877
    } else {
878
1850
        s->last_time_base = s->time_base;
879
1850
        s->time_base      = FFUDIV(s->time, s->avctx->time_base.den);
880
    }
881
2490
}
882
883
255
static void mpeg4_encode_gop_header(MpegEncContext *s)
884
{
885
    int64_t hours, minutes, seconds;
886
    int64_t time;
887
888
255
    put_bits(&s->pb, 16, 0);
889
255
    put_bits(&s->pb, 16, GOP_STARTCODE);
890
891
255
    time = s->current_picture_ptr->f->pts;
892
255
    if (s->reordered_input_picture[1])
893
81
        time = FFMIN(time, s->reordered_input_picture[1]->f->pts);
894
255
    time = time * s->avctx->time_base.num;
895
255
    s->last_time_base = FFUDIV(time, s->avctx->time_base.den);
896
897
255
    seconds = FFUDIV(time, s->avctx->time_base.den);
898

255
    minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60);
899

255
    hours   = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60);
900
255
    hours   = FFUMOD(hours  , 24);
901
902
255
    put_bits(&s->pb, 5, hours);
903
255
    put_bits(&s->pb, 6, minutes);
904
255
    put_bits(&s->pb, 1, 1);
905
255
    put_bits(&s->pb, 6, seconds);
906
907
255
    put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP));
908
255
    put_bits(&s->pb, 1, 0);  // broken link == NO
909
910
255
    ff_mpeg4_stuffing(&s->pb);
911
255
}
912
913
213
static void mpeg4_encode_visual_object_header(MpegEncContext *s)
914
{
915
    int profile_and_level_indication;
916
    int vo_ver_id;
917
918
213
    if (s->avctx->profile != FF_PROFILE_UNKNOWN) {
919
        profile_and_level_indication = s->avctx->profile << 4;
920

213
    } else if (s->max_b_frames || s->quarter_sample) {
921
101
        profile_and_level_indication = 0xF0;  // adv simple
922
    } else {
923
112
        profile_and_level_indication = 0x00;  // simple
924
    }
925
926
213
    if (s->avctx->level != FF_LEVEL_UNKNOWN)
927
        profile_and_level_indication |= s->avctx->level;
928
    else
929
213
        profile_and_level_indication |= 1;   // level 1
930
931
213
    if (profile_and_level_indication >> 4 == 0xF)
932
101
        vo_ver_id = 5;
933
    else
934
112
        vo_ver_id = 1;
935
936
    // FIXME levels
937
938
213
    put_bits(&s->pb, 16, 0);
939
213
    put_bits(&s->pb, 16, VOS_STARTCODE);
940
941
213
    put_bits(&s->pb, 8, profile_and_level_indication);
942
943
213
    put_bits(&s->pb, 16, 0);
944
213
    put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
945
946
213
    put_bits(&s->pb, 1, 1);
947
213
    put_bits(&s->pb, 4, vo_ver_id);
948
213
    put_bits(&s->pb, 3, 1);     // priority
949
950
213
    put_bits(&s->pb, 4, 1);     // visual obj type== video obj
951
952
213
    put_bits(&s->pb, 1, 0);     // video signal type == no clue // FIXME
953
954
213
    ff_mpeg4_stuffing(&s->pb);
955
213
}
956
957
213
static void mpeg4_encode_vol_header(MpegEncContext *s,
958
                                    int vo_number,
959
                                    int vol_number)
960
{
961
    int vo_ver_id;
962
963
    if (!CONFIG_MPEG4_ENCODER)
964
        return;
965
966

213
    if (s->max_b_frames || s->quarter_sample) {
967
101
        vo_ver_id  = 5;
968
101
        s->vo_type = ADV_SIMPLE_VO_TYPE;
969
    } else {
970
112
        vo_ver_id  = 1;
971
112
        s->vo_type = SIMPLE_VO_TYPE;
972
    }
973
974
213
    put_bits(&s->pb, 16, 0);
975
213
    put_bits(&s->pb, 16, 0x100 + vo_number);        /* video obj */
976
213
    put_bits(&s->pb, 16, 0);
977
213
    put_bits(&s->pb, 16, 0x120 + vol_number);       /* video obj layer */
978
979
213
    put_bits(&s->pb, 1, 0);             /* random access vol */
980
213
    put_bits(&s->pb, 8, s->vo_type);    /* video obj type indication */
981
213
    if (s->workaround_bugs & FF_BUG_MS) {
982
        put_bits(&s->pb, 1, 0);         /* is obj layer id= no */
983
    } else {
984
213
        put_bits(&s->pb, 1, 1);         /* is obj layer id= yes */
985
213
        put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
986
213
        put_bits(&s->pb, 3, 1);         /* is obj layer priority */
987
    }
988
989
213
    s->aspect_ratio_info = ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
990
991
213
    put_bits(&s->pb, 4, s->aspect_ratio_info); /* aspect ratio info */
992
213
    if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) {
993
        av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den,
994
                   s->avctx->sample_aspect_ratio.num,  s->avctx->sample_aspect_ratio.den, 255);
995
        put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
996
        put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
997
    }
998
999
213
    if (s->workaround_bugs & FF_BUG_MS) {
1000
        put_bits(&s->pb, 1, 0);         /* vol control parameters= no @@@ */
1001
    } else {
1002
213
        put_bits(&s->pb, 1, 1);         /* vol control parameters= yes */
1003
213
        put_bits(&s->pb, 2, 1);         /* chroma format YUV 420/YV12 */
1004
213
        put_bits(&s->pb, 1, s->low_delay);
1005
213
        put_bits(&s->pb, 1, 0);         /* vbv parameters= no */
1006
    }
1007
1008
213
    put_bits(&s->pb, 2, RECT_SHAPE);    /* vol shape= rectangle */
1009
213
    put_bits(&s->pb, 1, 1);             /* marker bit */
1010
1011
213
    put_bits(&s->pb, 16, s->avctx->time_base.den);
1012
213
    if (s->time_increment_bits < 1)
1013
        s->time_increment_bits = 1;
1014
213
    put_bits(&s->pb, 1, 1);             /* marker bit */
1015
213
    put_bits(&s->pb, 1, 0);             /* fixed vop rate=no */
1016
213
    put_bits(&s->pb, 1, 1);             /* marker bit */
1017
213
    put_bits(&s->pb, 13, s->width);     /* vol width */
1018
213
    put_bits(&s->pb, 1, 1);             /* marker bit */
1019
213
    put_bits(&s->pb, 13, s->height);    /* vol height */
1020
213
    put_bits(&s->pb, 1, 1);             /* marker bit */
1021
213
    put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
1022
213
    put_bits(&s->pb, 1, 1);             /* obmc disable */
1023
213
    if (vo_ver_id == 1)
1024
112
        put_bits(&s->pb, 1, 0);       /* sprite enable */
1025
    else
1026
101
        put_bits(&s->pb, 2, 0);       /* sprite enable */
1027
1028
213
    put_bits(&s->pb, 1, 0);             /* not 8 bit == false */
1029
213
    put_bits(&s->pb, 1, s->mpeg_quant); /* quant type = (0 = H.263 style) */
1030
1031
213
    if (s->mpeg_quant) {
1032
        ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
1033
        ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
1034
    }
1035
1036
213
    if (vo_ver_id != 1)
1037
101
        put_bits(&s->pb, 1, s->quarter_sample);
1038
213
    put_bits(&s->pb, 1, 1);             /* complexity estimation disable */
1039
213
    put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */
1040
213
    put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
1041
213
    if (s->data_partitioning)
1042
60
        put_bits(&s->pb, 1, 0);         /* no rvlc */
1043
1044
213
    if (vo_ver_id != 1) {
1045
101
        put_bits(&s->pb, 1, 0);         /* newpred */
1046
101
        put_bits(&s->pb, 1, 0);         /* reduced res vop */
1047
    }
1048
213
    put_bits(&s->pb, 1, 0);             /* scalability */
1049
1050
213
    ff_mpeg4_stuffing(&s->pb);
1051
1052
    /* user data */
1053
213
    if (!(s->avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
1054
        put_bits(&s->pb, 16, 0);
1055
        put_bits(&s->pb, 16, 0x1B2);    /* user_data */
1056
        avpriv_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
1057
    }
1058
}
1059
1060
/* write MPEG-4 VOP header */
1061
2490
int ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number)
1062
{
1063
    uint64_t time_incr;
1064
    int64_t time_div, time_mod;
1065
1066
2490
    if (s->pict_type == AV_PICTURE_TYPE_I) {
1067
255
        if (!(s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) {
1068
196
            if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT)  // HACK, the reference sw is buggy
1069
196
                mpeg4_encode_visual_object_header(s);
1070

196
            if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number == 0)  // HACK, the reference sw is buggy
1071
196
                mpeg4_encode_vol_header(s, 0, 0);
1072
        }
1073
255
        if (!(s->workaround_bugs & FF_BUG_MS))
1074
255
            mpeg4_encode_gop_header(s);
1075
    }
1076
1077

2490
    s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B;
1078
1079
2490
    put_bits(&s->pb, 16, 0);                /* vop header */
1080
2490
    put_bits(&s->pb, 16, VOP_STARTCODE);    /* vop header */
1081
2490
    put_bits(&s->pb, 2, s->pict_type - 1);  /* pict type: I = 0 , P = 1 */
1082
1083
2490
    time_div  = FFUDIV(s->time, s->avctx->time_base.den);
1084
2490
    time_mod  = FFUMOD(s->time, s->avctx->time_base.den);
1085
2490
    time_incr = time_div - s->last_time_base;
1086
1087
    // This limits the frame duration to max 1 hour
1088
2490
    if (time_incr > 3600) {
1089
        av_log(s->avctx, AV_LOG_ERROR, "time_incr %"PRIu64" too large\n", time_incr);
1090
        return AVERROR(EINVAL);
1091
    }
1092
2571
    while (time_incr--)
1093
81
        put_bits(&s->pb, 1, 1);
1094
1095
2490
    put_bits(&s->pb, 1, 0);
1096
1097
2490
    put_bits(&s->pb, 1, 1);                             /* marker */
1098
2490
    put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1099
2490
    put_bits(&s->pb, 1, 1);                             /* marker */
1100
2490
    put_bits(&s->pb, 1, 1);                             /* vop coded */
1101
2490
    if (s->pict_type == AV_PICTURE_TYPE_P) {
1102
1595
        put_bits(&s->pb, 1, s->no_rounding);    /* rounding type */
1103
    }
1104
2490
    put_bits(&s->pb, 3, 0);     /* intra dc VLC threshold */
1105
2490
    if (!s->progressive_sequence) {
1106
        put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
1107
        put_bits(&s->pb, 1, s->alternate_scan);
1108
    }
1109
    // FIXME sprite stuff
1110
1111
2490
    put_bits(&s->pb, 5, s->qscale);
1112
1113
2490
    if (s->pict_type != AV_PICTURE_TYPE_I)
1114
2235
        put_bits(&s->pb, 3, s->f_code);  /* fcode_for */
1115
2490
    if (s->pict_type == AV_PICTURE_TYPE_B)
1116
640
        put_bits(&s->pb, 3, s->b_code);  /* fcode_back */
1117
1118
2490
    return 0;
1119
}
1120
1121
58
static av_cold void init_uni_dc_tab(void)
1122
{
1123
    int level, uni_code, uni_len;
1124
1125
29754
    for (level = -256; level < 256; level++) {
1126
        int size, v, l;
1127
        /* find number of bits */
1128
29696
        size = 0;
1129
29696
        v    = abs(level);
1130
238206
        while (v) {
1131
208510
            v >>= 1;
1132
208510
            size++;
1133
        }
1134
1135
29696
        if (level < 0)
1136
14848
            l = (-level) ^ ((1 << size) - 1);
1137
        else
1138
14848
            l = level;
1139
1140
        /* luminance */
1141
29696
        uni_code = ff_mpeg4_DCtab_lum[size][0];
1142
29696
        uni_len  = ff_mpeg4_DCtab_lum[size][1];
1143
1144
29696
        if (size > 0) {
1145
29638
            uni_code <<= size;
1146
29638
            uni_code  |= l;
1147
29638
            uni_len   += size;
1148
29638
            if (size > 8) {
1149
58
                uni_code <<= 1;
1150
58
                uni_code  |= 1;
1151
58
                uni_len++;
1152
            }
1153
        }
1154
29696
        uni_DCtab_lum_bits[level + 256] = uni_code;
1155
29696
        uni_DCtab_lum_len[level + 256]  = uni_len;
1156
1157
        /* chrominance */
1158
29696
        uni_code = ff_mpeg4_DCtab_chrom[size][0];
1159
29696
        uni_len  = ff_mpeg4_DCtab_chrom[size][1];
1160
1161
29696
        if (size > 0) {
1162
29638
            uni_code <<= size;
1163
29638
            uni_code  |= l;
1164
29638
            uni_len   += size;
1165
29638
            if (size > 8) {
1166
58
                uni_code <<= 1;
1167
58
                uni_code  |= 1;
1168
58
                uni_len++;
1169
            }
1170
        }
1171
29696
        uni_DCtab_chrom_bits[level + 256] = uni_code;
1172
29696
        uni_DCtab_chrom_len[level + 256]  = uni_len;
1173
    }
1174
58
}
1175
1176
116
static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab,
1177
                                          uint8_t *len_tab)
1178
{
1179
    int slevel, run, last;
1180
1181
    av_assert0(MAX_LEVEL >= 64);
1182
    av_assert0(MAX_RUN >= 63);
1183
1184
14964
    for (slevel = -64; slevel < 64; slevel++) {
1185
14848
        if (slevel == 0)
1186
116
            continue;
1187
957580
        for (run = 0; run < 64; run++) {
1188
2828544
            for (last = 0; last <= 1; last++) {
1189
1885696
                const int index = UNI_MPEG4_ENC_INDEX(last, run, slevel + 64);
1190
1885696
                int level       = slevel < 0 ? -slevel : slevel;
1191
1885696
                int sign        = slevel < 0 ? 1 : 0;
1192
                int bits, len, code;
1193
                int level1, run1;
1194
1195
1885696
                len_tab[index] = 100;
1196
1197
                /* ESC0 */
1198
1885696
                code = get_rl_index(rl, last, run, level);
1199
1885696
                bits = rl->table_vlc[code][0];
1200
1885696
                len  = rl->table_vlc[code][1];
1201
1885696
                bits = bits * 2 + sign;
1202
1885696
                len++;
1203
1204

1885696
                if (code != rl->n && len < len_tab[index]) {
1205
23664
                    bits_tab[index] = bits;
1206
23664
                    len_tab[index]  = len;
1207
                }
1208
                /* ESC1 */
1209
1885696
                bits = rl->table_vlc[rl->n][0];
1210
1885696
                len  = rl->table_vlc[rl->n][1];
1211
1885696
                bits = bits * 2;
1212
1885696
                len++;                 // esc1
1213
1885696
                level1 = level - rl->max_level[last][run];
1214
1885696
                if (level1 > 0) {
1215
1862032
                    code   = get_rl_index(rl, last, run, level1);
1216
1862032
                    bits <<= rl->table_vlc[code][1];
1217
1862032
                    len   += rl->table_vlc[code][1];
1218
1862032
                    bits  += rl->table_vlc[code][0];
1219
1862032
                    bits   = bits * 2 + sign;
1220
1862032
                    len++;
1221
1222

1862032
                    if (code != rl->n && len < len_tab[index]) {
1223
23664
                        bits_tab[index] = bits;
1224
23664
                        len_tab[index]  = len;
1225
                    }
1226
                }
1227
                /* ESC2 */
1228
1885696
                bits = rl->table_vlc[rl->n][0];
1229
1885696
                len  = rl->table_vlc[rl->n][1];
1230
1885696
                bits = bits * 4 + 2;
1231
1885696
                len += 2;                 // esc2
1232
1885696
                run1 = run - rl->max_run[last][level] - 1;
1233
1885696
                if (run1 >= 0) {
1234
1838368
                    code   = get_rl_index(rl, last, run1, level);
1235
1838368
                    bits <<= rl->table_vlc[code][1];
1236
1838368
                    len   += rl->table_vlc[code][1];
1237
1838368
                    bits  += rl->table_vlc[code][0];
1238
1838368
                    bits   = bits * 2 + sign;
1239
1838368
                    len++;
1240
1241

1838368
                    if (code != rl->n && len < len_tab[index]) {
1242
14384
                        bits_tab[index] = bits;
1243
14384
                        len_tab[index]  = len;
1244
                    }
1245
                }
1246
                /* ESC3 */
1247
1885696
                bits = rl->table_vlc[rl->n][0];
1248
1885696
                len  = rl->table_vlc[rl->n][1];
1249
1885696
                bits = bits * 4 + 3;
1250
1885696
                len += 2;                 // esc3
1251
1885696
                bits = bits * 2 + last;
1252
1885696
                len++;
1253
1885696
                bits = bits * 64 + run;
1254
1885696
                len += 6;
1255
1885696
                bits = bits * 2 + 1;
1256
1885696
                len++;                    // marker
1257
1885696
                bits = bits * 4096 + (slevel & 0xfff);
1258
1885696
                len += 12;
1259
1885696
                bits = bits * 2 + 1;
1260
1885696
                len++;                    // marker
1261
1262
1885696
                if (len < len_tab[index]) {
1263
1825492
                    bits_tab[index] = bits;
1264
1825492
                    len_tab[index]  = len;
1265
                }
1266
            }
1267
        }
1268
    }
1269
116
}
1270
1271
58
static av_cold int encode_init(AVCodecContext *avctx)
1272
{
1273
58
    MpegEncContext *s = avctx->priv_data;
1274
    int ret;
1275
    static int done = 0;
1276
1277

58
    if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) {
1278
        av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n");
1279
        return AVERROR(EINVAL);
1280
    }
1281
1282
58
    if ((ret = ff_mpv_encode_init(avctx)) < 0)
1283
        return ret;
1284
1285
58
    if (!done) {
1286
58
        done = 1;
1287
1288
58
        init_uni_dc_tab();
1289
1290
58
        ff_rl_init(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
1291
1292
58
        init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
1293
58
        init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
1294
    }
1295
1296
58
    s->min_qcoeff               = -2048;
1297
58
    s->max_qcoeff               = 2047;
1298
58
    s->intra_ac_vlc_length      = uni_mpeg4_intra_rl_len;
1299
58
    s->intra_ac_vlc_last_length = uni_mpeg4_intra_rl_len + 128 * 64;
1300
58
    s->inter_ac_vlc_length      = uni_mpeg4_inter_rl_len;
1301
58
    s->inter_ac_vlc_last_length = uni_mpeg4_inter_rl_len + 128 * 64;
1302
58
    s->luma_dc_vlc_length       = uni_DCtab_lum_len;
1303
58
    s->ac_esc_length            = 7 + 2 + 1 + 6 + 1 + 12 + 1;
1304
58
    s->y_dc_scale_table         = ff_mpeg4_y_dc_scale_table;
1305
58
    s->c_dc_scale_table         = ff_mpeg4_c_dc_scale_table;
1306
1307
58
    if (s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
1308
17
        s->avctx->extradata = av_malloc(1024);
1309
17
        init_put_bits(&s->pb, s->avctx->extradata, 1024);
1310
1311
17
        if (!(s->workaround_bugs & FF_BUG_MS))
1312
17
            mpeg4_encode_visual_object_header(s);
1313
17
        mpeg4_encode_vol_header(s, 0, 0);
1314
1315
//            ff_mpeg4_stuffing(&s->pb); ?
1316
17
        flush_put_bits(&s->pb);
1317
17
        s->avctx->extradata_size = (put_bits_count(&s->pb) + 7) >> 3;
1318
    }
1319
58
    return 0;
1320
}
1321
1322
1760
void ff_mpeg4_init_partitions(MpegEncContext *s)
1323
{
1324
1760
    uint8_t *start = put_bits_ptr(&s->pb);
1325
1760
    uint8_t *end   = s->pb.buf_end;
1326
1760
    int size       = end - start;
1327
1760
    int pb_size    = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start;
1328
1760
    int tex_size   = (size - 2 * pb_size) & (~3);
1329
1330
1760
    set_put_bits_buffer_size(&s->pb, pb_size);
1331
1760
    init_put_bits(&s->tex_pb, start + pb_size, tex_size);
1332
1760
    init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size);
1333
1760
}
1334
1335
1760
void ff_mpeg4_merge_partitions(MpegEncContext *s)
1336
{
1337
1760
    const int pb2_len    = put_bits_count(&s->pb2);
1338
1760
    const int tex_pb_len = put_bits_count(&s->tex_pb);
1339
1760
    const int bits       = put_bits_count(&s->pb);
1340
1341
1760
    if (s->pict_type == AV_PICTURE_TYPE_I) {
1342
512
        put_bits(&s->pb, 19, DC_MARKER);
1343
512
        s->misc_bits  += 19 + pb2_len + bits - s->last_bits;
1344
512
        s->i_tex_bits += tex_pb_len;
1345
    } else {
1346
1248
        put_bits(&s->pb, 17, MOTION_MARKER);
1347
1248
        s->misc_bits  += 17 + pb2_len;
1348
1248
        s->mv_bits    += bits - s->last_bits;
1349
1248
        s->p_tex_bits += tex_pb_len;
1350
    }
1351
1352
1760
    flush_put_bits(&s->pb2);
1353
1760
    flush_put_bits(&s->tex_pb);
1354
1355
1760
    set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1356
1760
    avpriv_copy_bits(&s->pb, s->pb2.buf, pb2_len);
1357
1760
    avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1358
1760
    s->last_bits = put_bits_count(&s->pb);
1359
1760
}
1360
1361
3323
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
1362
{
1363
3323
    int mb_num_bits = av_log2(s->mb_num - 1) + 1;
1364
1365
3323
    put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
1366
3323
    put_bits(&s->pb, 1, 1);
1367
1368
3323
    put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y * s->mb_width);
1369
3323
    put_bits(&s->pb, s->quant_precision, s->qscale);
1370
3323
    put_bits(&s->pb, 1, 0); /* no HEC */
1371
3323
}
1372
1373
#define OFFSET(x) offsetof(MpegEncContext, x)
1374
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1375
static const AVOption options[] = {
1376
    { "data_partitioning", "Use data partitioning.",      OFFSET(data_partitioning), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1377
    { "alternate_scan",    "Enable alternate scantable.", OFFSET(alternate_scan),    AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1378
    FF_MPV_COMMON_OPTS
1379
    { NULL },
1380
};
1381
1382
static const AVClass mpeg4enc_class = {
1383
    .class_name = "MPEG4 encoder",
1384
    .item_name  = av_default_item_name,
1385
    .option     = options,
1386
    .version    = LIBAVUTIL_VERSION_INT,
1387
};
1388
1389
AVCodec ff_mpeg4_encoder = {
1390
    .name           = "mpeg4",
1391
    .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
1392
    .type           = AVMEDIA_TYPE_VIDEO,
1393
    .id             = AV_CODEC_ID_MPEG4,
1394
    .priv_data_size = sizeof(MpegEncContext),
1395
    .init           = encode_init,
1396
    .encode2        = ff_mpv_encode_picture,
1397
    .close          = ff_mpv_encode_end,
1398
    .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
1399
    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1400
    .priv_class     = &mpeg4enc_class,
1401
};