1 /*
2 * MSMPEG4 encoder backend
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at>
7 *
8 * This file is part of FFmpeg.
9 *
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25 /**
26 * @file
27 * MSMPEG4 encoder backend
28 */
29
30 #include <stdint.h>
31 #include <string.h>
32
33 #include "libavutil/attributes.h"
34 #include "libavutil/avutil.h"
35 #include "libavutil/thread.h"
36 #include "codec_internal.h"
37 #include "mpegvideo.h"
38 #include "mpegvideoenc.h"
39 #include "h263.h"
40 #include "h263data.h"
41 #include "mpeg4video.h"
42 #include "msmpeg4.h"
43 #include "msmpeg4data.h"
44 #include "msmpeg4enc.h"
45 #include "put_bits.h"
46 #include "rl.h"
47
48 static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2];
49
50 /* build the table which associate a (x,y) motion vector to a vlc */
init_mv_table(MVTable *tab, uint16_t table_mv_index[4096])51 static av_cold void init_mv_table(MVTable *tab, uint16_t table_mv_index[4096])
52 {
53 int i, x, y;
54
55 tab->table_mv_index = table_mv_index;
56
57 /* mark all entries as not used */
58 for(i=0;i<4096;i++)
59 tab->table_mv_index[i] = MSMPEG4_MV_TABLES_NB_ELEMS;
60
61 for (i = 0; i < MSMPEG4_MV_TABLES_NB_ELEMS; i++) {
62 x = tab->table_mvx[i];
63 y = tab->table_mvy[i];
64 tab->table_mv_index[(x << 6) | y] = i;
65 }
66 }
67
ff_msmpeg4_code012(PutBitContext *pb, int n)68 void ff_msmpeg4_code012(PutBitContext *pb, int n)
69 {
70 if (n == 0) {
71 put_bits(pb, 1, 0);
72 } else {
73 put_bits(pb, 1, 1);
74 put_bits(pb, 1, (n >= 2));
75 }
76 }
77
get_size_of_code(const RLTable *rl, int last, int run, int level, int intra)78 static int get_size_of_code(const RLTable *rl, int last, int run,
79 int level, int intra)
80 {
81 int size=0;
82 int code;
83 int run_diff= intra ? 0 : 1;
84
85 code = get_rl_index(rl, last, run, level);
86 size+= rl->table_vlc[code][1];
87 if (code == rl->n) {
88 int level1, run1;
89
90 level1 = level - rl->max_level[last][run];
91 if (level1 < 1)
92 goto esc2;
93 code = get_rl_index(rl, last, run, level1);
94 if (code == rl->n) {
95 esc2:
96 size++;
97 if (level > MAX_LEVEL)
98 goto esc3;
99 run1 = run - rl->max_run[last][level] - run_diff;
100 if (run1 < 0)
101 goto esc3;
102 code = get_rl_index(rl, last, run1, level);
103 if (code == rl->n) {
104 esc3:
105 /* third escape */
106 size+=1+1+6+8;
107 } else {
108 /* second escape */
109 size+= 1+1+ rl->table_vlc[code][1];
110 }
111 } else {
112 /* first escape */
113 size+= 1+1+ rl->table_vlc[code][1];
114 }
115 } else {
116 size++;
117 }
118 return size;
119 }
120
msmpeg4_encode_init_static(void)121 static av_cold void msmpeg4_encode_init_static(void)
122 {
123 static uint16_t mv_index_tables[2][4096];
124 init_mv_table(&ff_mv_tables[0], mv_index_tables[0]);
125 init_mv_table(&ff_mv_tables[1], mv_index_tables[1]);
126
127 for (int i = 0; i < NB_RL_TABLES; i++) {
128 for (int level = 1; level <= MAX_LEVEL; level++) {
129 for (int run = 0; run <= MAX_RUN; run++) {
130 for (int last = 0; last < 2; last++) {
131 rl_length[i][level][run][last] = get_size_of_code(&ff_rl_table[i], last, run, level, 0);
132 }
133 }
134 }
135 }
136 }
137
ff_msmpeg4_encode_init(MpegEncContext *s)138 av_cold void ff_msmpeg4_encode_init(MpegEncContext *s)
139 {
140 static AVOnce init_static_once = AV_ONCE_INIT;
141
142 ff_msmpeg4_common_init(s);
143 if (s->msmpeg4_version >= 4) {
144 s->min_qcoeff = -255;
145 s->max_qcoeff = 255;
146 }
147
148 /* init various encoding tables */
149 ff_thread_once(&init_static_once, msmpeg4_encode_init_static);
150 }
151
find_best_tables(MSMPEG4EncContext *ms)152 static void find_best_tables(MSMPEG4EncContext *ms)
153 {
154 MpegEncContext *const s = &ms->s;
155 int i;
156 int best = 0, best_size = INT_MAX;
157 int chroma_best = 0, best_chroma_size = INT_MAX;
158
159 for(i=0; i<3; i++){
160 int level;
161 int chroma_size=0;
162 int size=0;
163
164 if(i>0){// ;)
165 size++;
166 chroma_size++;
167 }
168 for(level=0; level<=MAX_LEVEL; level++){
169 int run;
170 for(run=0; run<=MAX_RUN; run++){
171 int last;
172 const int last_size= size + chroma_size;
173 for(last=0; last<2; last++){
174 int inter_count = ms->ac_stats[0][0][level][run][last] + ms->ac_stats[0][1][level][run][last];
175 int intra_luma_count = ms->ac_stats[1][0][level][run][last];
176 int intra_chroma_count= ms->ac_stats[1][1][level][run][last];
177
178 if(s->pict_type==AV_PICTURE_TYPE_I){
179 size += intra_luma_count *rl_length[i ][level][run][last];
180 chroma_size+= intra_chroma_count*rl_length[i+3][level][run][last];
181 }else{
182 size+= intra_luma_count *rl_length[i ][level][run][last]
183 +intra_chroma_count*rl_length[i+3][level][run][last]
184 +inter_count *rl_length[i+3][level][run][last];
185 }
186 }
187 if(last_size == size+chroma_size) break;
188 }
189 }
190 if(size<best_size){
191 best_size= size;
192 best= i;
193 }
194 if(chroma_size<best_chroma_size){
195 best_chroma_size= chroma_size;
196 chroma_best= i;
197 }
198 }
199
200 if(s->pict_type==AV_PICTURE_TYPE_P) chroma_best= best;
201
202 memset(ms->ac_stats, 0, sizeof(ms->ac_stats));
203
204 s->rl_table_index = best;
205 s->rl_chroma_table_index= chroma_best;
206
207 if(s->pict_type != s->last_non_b_pict_type){
208 s->rl_table_index= 2;
209 if(s->pict_type==AV_PICTURE_TYPE_I)
210 s->rl_chroma_table_index= 1;
211 else
212 s->rl_chroma_table_index= 2;
213 }
214
215 }
216
217 /* write MSMPEG4 compatible frame header */
ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number)218 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
219 {
220 MSMPEG4EncContext *const ms = (MSMPEG4EncContext*)s;
221
222 find_best_tables(ms);
223
224 align_put_bits(&s->pb);
225 put_bits(&s->pb, 2, s->pict_type - 1);
226
227 put_bits(&s->pb, 5, s->qscale);
228 if(s->msmpeg4_version<=2){
229 s->rl_table_index = 2;
230 s->rl_chroma_table_index = 2;
231 }
232
233 s->dc_table_index = 1;
234 s->mv_table_index = 1; /* only if P-frame */
235 s->use_skip_mb_code = 1; /* only if P-frame */
236 s->per_mb_rl_table = 0;
237 if(s->msmpeg4_version==4)
238 s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==AV_PICTURE_TYPE_P);
239 ff_dlog(s, "%d %"PRId64" %d %d %d\n", s->pict_type, s->bit_rate,
240 s->inter_intra_pred, s->width, s->height);
241
242 if (s->pict_type == AV_PICTURE_TYPE_I) {
243 s->slice_height= s->mb_height/1;
244 put_bits(&s->pb, 5, 0x16 + s->mb_height/s->slice_height);
245
246 if(s->msmpeg4_version==4){
247 ff_msmpeg4_encode_ext_header(s);
248 if(s->bit_rate>MBAC_BITRATE)
249 put_bits(&s->pb, 1, s->per_mb_rl_table);
250 }
251
252 if(s->msmpeg4_version>2){
253 if(!s->per_mb_rl_table){
254 ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);
255 ff_msmpeg4_code012(&s->pb, s->rl_table_index);
256 }
257
258 put_bits(&s->pb, 1, s->dc_table_index);
259 }
260 } else {
261 put_bits(&s->pb, 1, s->use_skip_mb_code);
262
263 if(s->msmpeg4_version==4 && s->bit_rate>MBAC_BITRATE)
264 put_bits(&s->pb, 1, s->per_mb_rl_table);
265
266 if(s->msmpeg4_version>2){
267 if(!s->per_mb_rl_table)
268 ff_msmpeg4_code012(&s->pb, s->rl_table_index);
269
270 put_bits(&s->pb, 1, s->dc_table_index);
271
272 put_bits(&s->pb, 1, s->mv_table_index);
273 }
274 }
275
276 s->esc3_level_length= 0;
277 s->esc3_run_length= 0;
278 }
279
ff_msmpeg4_encode_ext_header(MpegEncContext * s)280 void ff_msmpeg4_encode_ext_header(MpegEncContext * s)
281 {
282 unsigned fps = s->avctx->time_base.den / s->avctx->time_base.num / FFMAX(s->avctx->ticks_per_frame, 1);
283 put_bits(&s->pb, 5, FFMIN(fps, 31)); //yes 29.97 -> 29
284
285 put_bits(&s->pb, 11, FFMIN(s->bit_rate/1024, 2047));
286
287 if(s->msmpeg4_version>=3)
288 put_bits(&s->pb, 1, s->flipflop_rounding);
289 else
290 av_assert0(s->flipflop_rounding==0);
291 }
292
ff_msmpeg4_encode_motion(MpegEncContext * s, int mx, int my)293 void ff_msmpeg4_encode_motion(MpegEncContext * s,
294 int mx, int my)
295 {
296 int code;
297 MVTable *mv;
298
299 /* modulo encoding */
300 /* WARNING : you cannot reach all the MVs even with the modulo
301 encoding. This is a somewhat strange compromise they took !!! */
302 if (mx <= -64)
303 mx += 64;
304 else if (mx >= 64)
305 mx -= 64;
306 if (my <= -64)
307 my += 64;
308 else if (my >= 64)
309 my -= 64;
310
311 mx += 32;
312 my += 32;
313 mv = &ff_mv_tables[s->mv_table_index];
314
315 code = mv->table_mv_index[(mx << 6) | my];
316 put_bits(&s->pb,
317 mv->table_mv_bits[code],
318 mv->table_mv_code[code]);
319 if (code == MSMPEG4_MV_TABLES_NB_ELEMS) {
320 /* escape : code literally */
321 put_bits(&s->pb, 6, mx);
322 put_bits(&s->pb, 6, my);
323 }
324 }
325
ff_msmpeg4_handle_slices(MpegEncContext *s)326 void ff_msmpeg4_handle_slices(MpegEncContext *s){
327 if (s->mb_x == 0) {
328 if (s->slice_height && (s->mb_y % s->slice_height) == 0) {
329 if(s->msmpeg4_version < 4){
330 ff_mpeg4_clean_buffers(s);
331 }
332 s->first_slice_line = 1;
333 } else {
334 s->first_slice_line = 0;
335 }
336 }
337 }
338
msmpeg4v2_encode_motion(MpegEncContext * s, int val)339 static void msmpeg4v2_encode_motion(MpegEncContext * s, int val)
340 {
341 int range, bit_size, sign, code, bits;
342
343 if (val == 0) {
344 /* zero vector */
345 code = 0;
346 put_bits(&s->pb, ff_mvtab[code][1], ff_mvtab[code][0]);
347 } else {
348 bit_size = s->f_code - 1;
349 range = 1 << bit_size;
350 if (val <= -64)
351 val += 64;
352 else if (val >= 64)
353 val -= 64;
354
355 if (val >= 0) {
356 sign = 0;
357 } else {
358 val = -val;
359 sign = 1;
360 }
361 val--;
362 code = (val >> bit_size) + 1;
363 bits = val & (range - 1);
364
365 put_bits(&s->pb, ff_mvtab[code][1] + 1, (ff_mvtab[code][0] << 1) | sign);
366 if (bit_size > 0) {
367 put_bits(&s->pb, bit_size, bits);
368 }
369 }
370 }
371
ff_msmpeg4_encode_mb(MpegEncContext * s, int16_t block[6][64], int motion_x, int motion_y)372 void ff_msmpeg4_encode_mb(MpegEncContext * s,
373 int16_t block[6][64],
374 int motion_x, int motion_y)
375 {
376 int cbp, coded_cbp, i;
377 int pred_x, pred_y;
378 uint8_t *coded_block;
379
380 ff_msmpeg4_handle_slices(s);
381
382 if (!s->mb_intra) {
383 /* compute cbp */
384 cbp = 0;
385 for (i = 0; i < 6; i++) {
386 if (s->block_last_index[i] >= 0)
387 cbp |= 1 << (5 - i);
388 }
389 if (s->use_skip_mb_code && (cbp | motion_x | motion_y) == 0) {
390 /* skip macroblock */
391 put_bits(&s->pb, 1, 1);
392 s->last_bits++;
393 s->misc_bits++;
394 s->skip_count++;
395
396 return;
397 }
398 if (s->use_skip_mb_code)
399 put_bits(&s->pb, 1, 0); /* mb coded */
400
401 if(s->msmpeg4_version<=2){
402 put_bits(&s->pb,
403 ff_v2_mb_type[cbp&3][1],
404 ff_v2_mb_type[cbp&3][0]);
405 if((cbp&3) != 3) coded_cbp= cbp ^ 0x3C;
406 else coded_cbp= cbp;
407
408 put_bits(&s->pb,
409 ff_h263_cbpy_tab[coded_cbp>>2][1],
410 ff_h263_cbpy_tab[coded_cbp>>2][0]);
411
412 s->misc_bits += get_bits_diff(s);
413
414 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
415 msmpeg4v2_encode_motion(s, motion_x - pred_x);
416 msmpeg4v2_encode_motion(s, motion_y - pred_y);
417 }else{
418 put_bits(&s->pb,
419 ff_table_mb_non_intra[cbp + 64][1],
420 ff_table_mb_non_intra[cbp + 64][0]);
421
422 s->misc_bits += get_bits_diff(s);
423
424 /* motion vector */
425 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
426 ff_msmpeg4_encode_motion(s, motion_x - pred_x,
427 motion_y - pred_y);
428 }
429
430 s->mv_bits += get_bits_diff(s);
431
432 for (i = 0; i < 6; i++) {
433 ff_msmpeg4_encode_block(s, block[i], i);
434 }
435 s->p_tex_bits += get_bits_diff(s);
436 } else {
437 /* compute cbp */
438 cbp = 0;
439 coded_cbp = 0;
440 for (i = 0; i < 6; i++) {
441 int val, pred;
442 val = (s->block_last_index[i] >= 1);
443 cbp |= val << (5 - i);
444 if (i < 4) {
445 /* predict value for close blocks only for luma */
446 pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
447 *coded_block = val;
448 val = val ^ pred;
449 }
450 coded_cbp |= val << (5 - i);
451 }
452
453 if(s->msmpeg4_version<=2){
454 if (s->pict_type == AV_PICTURE_TYPE_I) {
455 put_bits(&s->pb,
456 ff_v2_intra_cbpc[cbp&3][1], ff_v2_intra_cbpc[cbp&3][0]);
457 } else {
458 if (s->use_skip_mb_code)
459 put_bits(&s->pb, 1, 0); /* mb coded */
460 put_bits(&s->pb,
461 ff_v2_mb_type[(cbp&3) + 4][1],
462 ff_v2_mb_type[(cbp&3) + 4][0]);
463 }
464 put_bits(&s->pb, 1, 0); /* no AC prediction yet */
465 put_bits(&s->pb,
466 ff_h263_cbpy_tab[cbp>>2][1],
467 ff_h263_cbpy_tab[cbp>>2][0]);
468 }else{
469 if (s->pict_type == AV_PICTURE_TYPE_I) {
470 put_bits(&s->pb,
471 ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
472 } else {
473 if (s->use_skip_mb_code)
474 put_bits(&s->pb, 1, 0); /* mb coded */
475 put_bits(&s->pb,
476 ff_table_mb_non_intra[cbp][1],
477 ff_table_mb_non_intra[cbp][0]);
478 }
479 put_bits(&s->pb, 1, 0); /* no AC prediction yet */
480 if(s->inter_intra_pred){
481 s->h263_aic_dir=0;
482 put_bits(&s->pb, ff_table_inter_intra[s->h263_aic_dir][1], ff_table_inter_intra[s->h263_aic_dir][0]);
483 }
484 }
485 s->misc_bits += get_bits_diff(s);
486
487 for (i = 0; i < 6; i++) {
488 ff_msmpeg4_encode_block(s, block[i], i);
489 }
490 s->i_tex_bits += get_bits_diff(s);
491 s->i_count++;
492 }
493 }
494
msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr)495 static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr)
496 {
497 int sign, code;
498 int pred;
499
500 int16_t *dc_val;
501 pred = ff_msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);
502
503 /* update predictor */
504 if (n < 4) {
505 *dc_val = level * s->y_dc_scale;
506 } else {
507 *dc_val = level * s->c_dc_scale;
508 }
509
510 /* do the prediction */
511 level -= pred;
512
513 if(s->msmpeg4_version<=2){
514 if (n < 4) {
515 put_bits(&s->pb,
516 ff_v2_dc_lum_table[level + 256][1],
517 ff_v2_dc_lum_table[level + 256][0]);
518 }else{
519 put_bits(&s->pb,
520 ff_v2_dc_chroma_table[level + 256][1],
521 ff_v2_dc_chroma_table[level + 256][0]);
522 }
523 }else{
524 sign = 0;
525 if (level < 0) {
526 level = -level;
527 sign = 1;
528 }
529 code = level;
530 if (code > DC_MAX)
531 code = DC_MAX;
532
533 if (s->dc_table_index == 0) {
534 if (n < 4) {
535 put_bits(&s->pb, ff_table0_dc_lum[code][1], ff_table0_dc_lum[code][0]);
536 } else {
537 put_bits(&s->pb, ff_table0_dc_chroma[code][1], ff_table0_dc_chroma[code][0]);
538 }
539 } else {
540 if (n < 4) {
541 put_bits(&s->pb, ff_table1_dc_lum[code][1], ff_table1_dc_lum[code][0]);
542 } else {
543 put_bits(&s->pb, ff_table1_dc_chroma[code][1], ff_table1_dc_chroma[code][0]);
544 }
545 }
546
547 if (code == DC_MAX)
548 put_bits(&s->pb, 8, level);
549
550 if (level != 0) {
551 put_bits(&s->pb, 1, sign);
552 }
553 }
554 }
555
556 /* Encoding of a block; very similar to MPEG-4 except for a different
557 * escape coding (same as H.263) and more VLC tables. */
ff_msmpeg4_encode_block(MpegEncContext * s, int16_t * block, int n)558 void ff_msmpeg4_encode_block(MpegEncContext * s, int16_t * block, int n)
559 {
560 MSMPEG4EncContext *const ms = (MSMPEG4EncContext*)s;
561 int level, run, last, i, j, last_index;
562 int last_non_zero, sign, slevel;
563 int code, run_diff, dc_pred_dir;
564 const RLTable *rl;
565 const uint8_t *scantable;
566
567 if (s->mb_intra) {
568 msmpeg4_encode_dc(s, block[0], n, &dc_pred_dir);
569 i = 1;
570 if (n < 4) {
571 rl = &ff_rl_table[s->rl_table_index];
572 } else {
573 rl = &ff_rl_table[3 + s->rl_chroma_table_index];
574 }
575 run_diff = s->msmpeg4_version>=4;
576 scantable= s->intra_scantable.permutated;
577 } else {
578 i = 0;
579 rl = &ff_rl_table[3 + s->rl_table_index];
580 if(s->msmpeg4_version<=2)
581 run_diff = 0;
582 else
583 run_diff = 1;
584 scantable= s->inter_scantable.permutated;
585 }
586
587 /* recalculate block_last_index for M$ wmv1 */
588 if (s->msmpeg4_version >= 4 && s->block_last_index[n] > 0) {
589 for(last_index=63; last_index>=0; last_index--){
590 if(block[scantable[last_index]]) break;
591 }
592 s->block_last_index[n]= last_index;
593 }else
594 last_index = s->block_last_index[n];
595 /* AC coefs */
596 last_non_zero = i - 1;
597 for (; i <= last_index; i++) {
598 j = scantable[i];
599 level = block[j];
600 if (level) {
601 run = i - last_non_zero - 1;
602 last = (i == last_index);
603 sign = 0;
604 slevel = level;
605 if (level < 0) {
606 sign = 1;
607 level = -level;
608 }
609
610 if(level<=MAX_LEVEL && run<=MAX_RUN){
611 ms->ac_stats[s->mb_intra][n>3][level][run][last]++;
612 }
613
614 ms->ac_stats[s->mb_intra][n > 3][40][63][0]++; //esc3 like
615
616 code = get_rl_index(rl, last, run, level);
617 put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
618 if (code == rl->n) {
619 int level1, run1;
620
621 level1 = level - rl->max_level[last][run];
622 if (level1 < 1)
623 goto esc2;
624 code = get_rl_index(rl, last, run, level1);
625 if (code == rl->n) {
626 esc2:
627 put_bits(&s->pb, 1, 0);
628 if (level > MAX_LEVEL)
629 goto esc3;
630 run1 = run - rl->max_run[last][level] - run_diff;
631 if (run1 < 0)
632 goto esc3;
633 code = get_rl_index(rl, last, run1+1, level);
634 if (s->msmpeg4_version == 4 && code == rl->n)
635 goto esc3;
636 code = get_rl_index(rl, last, run1, level);
637 if (code == rl->n) {
638 esc3:
639 /* third escape */
640 put_bits(&s->pb, 1, 0);
641 put_bits(&s->pb, 1, last);
642 if(s->msmpeg4_version>=4){
643 if(s->esc3_level_length==0){
644 s->esc3_level_length=8;
645 s->esc3_run_length= 6;
646 //ESCLVLSZ + ESCRUNSZ
647 if(s->qscale<8)
648 put_bits(&s->pb, 6, 3);
649 else
650 put_bits(&s->pb, 8, 3);
651 }
652 put_bits(&s->pb, s->esc3_run_length, run);
653 put_bits(&s->pb, 1, sign);
654 put_bits(&s->pb, s->esc3_level_length, level);
655 }else{
656 put_bits(&s->pb, 6, run);
657 put_sbits(&s->pb, 8, slevel);
658 }
659 } else {
660 /* second escape */
661 put_bits(&s->pb, 1, 1);
662 put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
663 put_bits(&s->pb, 1, sign);
664 }
665 } else {
666 /* first escape */
667 put_bits(&s->pb, 1, 1);
668 put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
669 put_bits(&s->pb, 1, sign);
670 }
671 } else {
672 put_bits(&s->pb, 1, sign);
673 }
674 last_non_zero = i;
675 }
676 }
677 }
678
679 const FFCodec ff_msmpeg4v2_encoder = {
680 .p.name = "msmpeg4v2",
681 .p.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 2"),
682 .p.type = AVMEDIA_TYPE_VIDEO,
683 .p.id = AV_CODEC_ID_MSMPEG4V2,
684 .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
685 .p.priv_class = &ff_mpv_enc_class,
686 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
687 .priv_data_size = sizeof(MSMPEG4EncContext),
688 .init = ff_mpv_encode_init,
689 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
690 .close = ff_mpv_encode_end,
691 };
692
693 const FFCodec ff_msmpeg4v3_encoder = {
694 .p.name = "msmpeg4",
695 .p.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 3"),
696 .p.type = AVMEDIA_TYPE_VIDEO,
697 .p.id = AV_CODEC_ID_MSMPEG4V3,
698 .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
699 .p.priv_class = &ff_mpv_enc_class,
700 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
701 .priv_data_size = sizeof(MSMPEG4EncContext),
702 .init = ff_mpv_encode_init,
703 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
704 .close = ff_mpv_encode_end,
705 };
706
707 const FFCodec ff_wmv1_encoder = {
708 .p.name = "wmv1",
709 .p.long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 7"),
710 .p.type = AVMEDIA_TYPE_VIDEO,
711 .p.id = AV_CODEC_ID_WMV1,
712 .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
713 .p.priv_class = &ff_mpv_enc_class,
714 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
715 .priv_data_size = sizeof(MSMPEG4EncContext),
716 .init = ff_mpv_encode_init,
717 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
718 .close = ff_mpv_encode_end,
719 };
720