3
* Copyright (c) 2000,2001 Fabrice Bellard
4
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6
* This file is part of FFmpeg.
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.
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.
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
30
#include "mpegvideo.h"
33
#include "mpeg12data.h"
34
#include "bytestream.h"
37
static const uint8_t inv_non_linear_qscale[13] = {
39
9,10,11,12,13,14,15,16,
42
static const uint8_t svcd_scan_offset_placeholder[14] = {
50
static void mpeg1_encode_block(MpegEncContext *s,
53
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
55
static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
56
static uint8_t fcode_tab[MAX_MV*2+1];
58
static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
59
static uint8_t uni_mpeg2_ac_vlc_len [64*64*2];
61
/* simple include everything table for dc, first byte is bits number next 3 are code*/
62
static uint32_t mpeg1_lum_dc_uni[512];
63
static uint32_t mpeg1_chr_dc_uni[512];
65
static uint8_t mpeg1_index_run[2][64];
66
static int8_t mpeg1_max_level[2][64];
68
static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
74
for(run=0; run<64; run++){
77
int alevel= FFABS(level);
78
int sign= (level>>31)&1;
80
if (alevel > rl->max_level[0][run])
83
code= rl->index_run[0][run] + alevel - 1;
85
if (code < 111 /* rl->n */) {
86
/* store the vlc & sign at once */
87
len= rl->table_vlc[code][1]+1;
88
bits= (rl->table_vlc[code][0]<<1) + sign;
90
len= rl->table_vlc[111/*rl->n*/][1]+6;
91
bits= rl->table_vlc[111/*rl->n*/][0]<<6;
101
bits|= 0x8001 + level + 255;
103
bits|= level & 0xffff;
108
uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
114
static int find_frame_rate_index(MpegEncContext *s){
116
int64_t dmin= INT64_MAX;
120
int64_t n0= 1001LL/ff_frame_rate_tab[i].den*ff_frame_rate_tab[i].num*s->avctx->time_base.num;
121
int64_t n1= 1001LL*s->avctx->time_base.den;
122
if(s->avctx->strict_std_compliance > FF_COMPLIANCE_INOFFICIAL && i>=9) break;
127
s->frame_rate_index= i;
136
static av_cold int encode_init(AVCodecContext *avctx)
138
MpegEncContext *s = avctx->priv_data;
140
if(MPV_encode_init(avctx) < 0)
143
if(find_frame_rate_index(s) < 0){
144
if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
145
av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
148
av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num);
152
if(avctx->profile == FF_PROFILE_UNKNOWN){
153
if(avctx->level != FF_LEVEL_UNKNOWN){
154
av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
157
avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
160
if(avctx->level == FF_LEVEL_UNKNOWN){
161
if(avctx->profile == 0){ /* 4:2:2 */
162
if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
163
else avctx->level = 2; /* High */
165
if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
166
av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
169
if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
170
else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */
171
else avctx->level = 4; /* High */
175
if((avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) && s->frame_rate_index != 4){
176
av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
183
static void put_header(MpegEncContext *s, int header)
185
align_put_bits(&s->pb);
186
put_bits(&s->pb, 16, header>>16);
187
put_sbits(&s->pb, 16, header);
190
/* put sequence header if needed */
191
static void mpeg1_encode_sequence_header(MpegEncContext *s)
193
unsigned int vbv_buffer_size;
197
float best_aspect_error= 1E10;
198
float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
199
int constraint_parameter_flag;
201
if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
203
if (s->current_picture.key_frame) {
204
AVRational framerate= ff_frame_rate_tab[s->frame_rate_index];
206
/* mpeg1 header repeated every gop */
207
put_header(s, SEQ_START_CODE);
209
put_sbits(&s->pb, 12, s->width );
210
put_sbits(&s->pb, 12, s->height);
213
float error= aspect_ratio;
214
if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
215
error-= 1.0/ff_mpeg1_aspect[i];
217
error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width;
221
if(error < best_aspect_error){
222
best_aspect_error= error;
223
s->aspect_ratio_info= i;
227
put_bits(&s->pb, 4, s->aspect_ratio_info);
228
put_bits(&s->pb, 4, s->frame_rate_index);
230
if(s->avctx->rc_max_rate){
231
v = (s->avctx->rc_max_rate + 399) / 400;
232
if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
238
if(s->avctx->rc_buffer_size)
239
vbv_buffer_size = s->avctx->rc_buffer_size;
241
/* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
242
vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
243
vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
245
put_sbits(&s->pb, 18, v);
246
put_bits(&s->pb, 1, 1); /* marker */
247
put_sbits(&s->pb, 10, vbv_buffer_size);
249
constraint_parameter_flag=
250
s->width <= 768 && s->height <= 576 &&
251
s->mb_width * s->mb_height <= 396 &&
252
s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
253
framerate.num <= framerate.den*30 &&
254
s->avctx->me_range && s->avctx->me_range < 128 &&
255
vbv_buffer_size <= 20 &&
257
s->codec_id == CODEC_ID_MPEG1VIDEO;
259
put_bits(&s->pb, 1, constraint_parameter_flag);
261
ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
262
ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
264
if(s->codec_id == CODEC_ID_MPEG2VIDEO){
265
put_header(s, EXT_START_CODE);
266
put_bits(&s->pb, 4, 1); //seq ext
268
put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
270
put_bits(&s->pb, 3, s->avctx->profile); //profile
271
put_bits(&s->pb, 4, s->avctx->level); //level
273
put_bits(&s->pb, 1, s->progressive_sequence);
274
put_bits(&s->pb, 2, s->chroma_format);
275
put_bits(&s->pb, 2, s->width >>12);
276
put_bits(&s->pb, 2, s->height>>12);
277
put_bits(&s->pb, 12, v>>18); //bitrate ext
278
put_bits(&s->pb, 1, 1); //marker
279
put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
280
put_bits(&s->pb, 1, s->low_delay);
281
put_bits(&s->pb, 2, 0); // frame_rate_ext_n
282
put_bits(&s->pb, 5, 0); // frame_rate_ext_d
285
put_header(s, GOP_START_CODE);
286
put_bits(&s->pb, 1, !!(s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE)); /* drop frame flag */
287
/* time code : we must convert from the real frame rate to a
288
fake mpeg frame rate in case of low frame rate */
289
fps = (framerate.num + framerate.den/2)/ framerate.den;
290
time_code = s->current_picture_ptr->coded_picture_number + s->avctx->timecode_frame_start;
292
s->gop_picture_number = s->current_picture_ptr->coded_picture_number;
293
if (s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) {
294
/* only works for NTSC 29.97 */
295
int d = time_code / 17982;
296
int m = time_code % 17982;
297
//if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
298
time_code += 18 * d + 2 * ((m - 2) / 1798);
300
put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
301
put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
302
put_bits(&s->pb, 1, 1);
303
put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
304
put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
305
put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
306
put_bits(&s->pb, 1, 0); /* broken link */
310
static inline void encode_mb_skip_run(MpegEncContext *s, int run){
312
put_bits(&s->pb, 11, 0x008);
315
put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
316
ff_mpeg12_mbAddrIncrTable[run][0]);
319
static av_always_inline void put_qscale(MpegEncContext *s)
322
assert(s->qscale>=1 && s->qscale <=12);
323
put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
325
put_bits(&s->pb, 5, s->qscale);
329
void ff_mpeg1_encode_slice_header(MpegEncContext *s){
330
if (s->height > 2800) {
331
put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
332
put_bits(&s->pb, 3, s->mb_y >> 7); /* slice_vertical_position_extension */
334
put_header(s, SLICE_MIN_START_CODE + s->mb_y);
337
put_bits(&s->pb, 1, 0); /* slice extra information */
340
void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
342
mpeg1_encode_sequence_header(s);
344
/* mpeg1 picture header */
345
put_header(s, PICTURE_START_CODE);
346
/* temporal reference */
348
// RAL: s->picture_number instead of s->fake_picture_number
349
put_bits(&s->pb, 10, (s->picture_number -
350
s->gop_picture_number) & 0x3ff);
351
put_bits(&s->pb, 3, s->pict_type);
353
s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
354
put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
356
// RAL: Forward f_code also needed for B frames
357
if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) {
358
put_bits(&s->pb, 1, 0); /* half pel coordinates */
359
if(s->codec_id == CODEC_ID_MPEG1VIDEO)
360
put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
362
put_bits(&s->pb, 3, 7); /* forward_f_code */
365
// RAL: Backward f_code necessary for B frames
366
if (s->pict_type == FF_B_TYPE) {
367
put_bits(&s->pb, 1, 0); /* half pel coordinates */
368
if(s->codec_id == CODEC_ID_MPEG1VIDEO)
369
put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
371
put_bits(&s->pb, 3, 7); /* backward_f_code */
374
put_bits(&s->pb, 1, 0); /* extra bit picture */
376
s->frame_pred_frame_dct = 1;
377
if(s->codec_id == CODEC_ID_MPEG2VIDEO){
378
put_header(s, EXT_START_CODE);
379
put_bits(&s->pb, 4, 8); //pic ext
380
if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) {
381
put_bits(&s->pb, 4, s->f_code);
382
put_bits(&s->pb, 4, s->f_code);
384
put_bits(&s->pb, 8, 255);
386
if (s->pict_type == FF_B_TYPE) {
387
put_bits(&s->pb, 4, s->b_code);
388
put_bits(&s->pb, 4, s->b_code);
390
put_bits(&s->pb, 8, 255);
392
put_bits(&s->pb, 2, s->intra_dc_precision);
394
assert(s->picture_structure == PICT_FRAME);
395
put_bits(&s->pb, 2, s->picture_structure);
396
if (s->progressive_sequence) {
397
put_bits(&s->pb, 1, 0); /* no repeat */
399
put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
401
/* XXX: optimize the generation of this flag with entropy
403
s->frame_pred_frame_dct = s->progressive_sequence;
405
put_bits(&s->pb, 1, s->frame_pred_frame_dct);
406
put_bits(&s->pb, 1, s->concealment_motion_vectors);
407
put_bits(&s->pb, 1, s->q_scale_type);
408
put_bits(&s->pb, 1, s->intra_vlc_format);
409
put_bits(&s->pb, 1, s->alternate_scan);
410
put_bits(&s->pb, 1, s->repeat_first_field);
411
s->progressive_frame = s->progressive_sequence;
412
put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
413
put_bits(&s->pb, 1, s->progressive_frame);
414
put_bits(&s->pb, 1, 0); //composite_display_flag
416
if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
419
put_header(s, USER_START_CODE);
420
for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
421
put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
426
ff_mpeg1_encode_slice_header(s);
429
static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
430
int has_mv, int field_motion)
432
put_bits(&s->pb, n, bits);
433
if (!s->frame_pred_frame_dct) {
435
put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
436
put_bits(&s->pb, 1, s->interlaced_dct);
440
static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
441
DCTELEM block[6][64],
442
int motion_x, int motion_y,
446
const int mb_x = s->mb_x;
447
const int mb_y = s->mb_y;
448
const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
452
for(i=0;i<mb_block_count;i++) {
453
if (s->block_last_index[i] >= 0)
454
cbp |= 1 << (mb_block_count - 1 - i);
457
if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
458
(mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
459
((s->pict_type == FF_P_TYPE && (motion_x | motion_y) == 0) ||
460
(s->pict_type == FF_B_TYPE && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
461
((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
463
s->qscale -= s->dquant;
467
if(s->pict_type == FF_P_TYPE){
468
s->last_mv[0][1][0]= s->last_mv[0][0][0]=
469
s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
473
assert(s->mb_skip_run == 0);
474
encode_mb_skip_run(s, s->mb_x);
476
encode_mb_skip_run(s, s->mb_skip_run);
479
if (s->pict_type == FF_I_TYPE) {
480
if(s->dquant && cbp){
481
put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
484
put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
485
s->qscale -= s->dquant;
487
s->misc_bits+= get_bits_diff(s);
489
} else if (s->mb_intra) {
490
if(s->dquant && cbp){
491
put_mb_modes(s, 6, 0x01, 0, 0);
494
put_mb_modes(s, 5, 0x03, 0, 0);
495
s->qscale -= s->dquant;
497
s->misc_bits+= get_bits_diff(s);
499
memset(s->last_mv, 0, sizeof(s->last_mv));
500
} else if (s->pict_type == FF_P_TYPE) {
501
if(s->mv_type == MV_TYPE_16X16){
503
if ((motion_x|motion_y) == 0) {
505
put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
508
put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
510
s->misc_bits+= get_bits_diff(s);
513
put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
516
put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
518
s->misc_bits+= get_bits_diff(s);
519
mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
520
mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
521
s->mv_bits+= get_bits_diff(s);
524
put_bits(&s->pb, 3, 1); /* motion only */
525
if (!s->frame_pred_frame_dct)
526
put_bits(&s->pb, 2, 2); /* motion_type: frame */
527
s->misc_bits+= get_bits_diff(s);
528
mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
529
mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
530
s->qscale -= s->dquant;
531
s->mv_bits+= get_bits_diff(s);
533
s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
534
s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
536
assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
540
put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
543
put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
546
put_bits(&s->pb, 3, 1); /* motion only */
547
put_bits(&s->pb, 2, 1); /* motion_type: field */
548
s->qscale -= s->dquant;
550
s->misc_bits+= get_bits_diff(s);
552
put_bits(&s->pb, 1, s->field_select[0][i]);
553
mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
554
mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
555
s->last_mv[0][i][0]= s->mv[0][i][0];
556
s->last_mv[0][i][1]= 2*s->mv[0][i][1];
558
s->mv_bits+= get_bits_diff(s);
561
if (s->chroma_y_shift) {
562
put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
564
put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
565
put_sbits(&s->pb, 2, cbp);
570
if(s->mv_type == MV_TYPE_16X16){
571
if (cbp){ // With coded bloc pattern
573
if(s->mv_dir == MV_DIR_FORWARD)
574
put_mb_modes(s, 6, 3, 1, 0);
576
put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);
579
put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);
581
}else{ // No coded bloc pattern
582
put_bits(&s->pb, 5-s->mv_dir, 2);
583
if (!s->frame_pred_frame_dct)
584
put_bits(&s->pb, 2, 2); /* motion_type: frame */
585
s->qscale -= s->dquant;
587
s->misc_bits += get_bits_diff(s);
588
if (s->mv_dir&MV_DIR_FORWARD){
589
mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
590
mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
591
s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
592
s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
595
if (s->mv_dir&MV_DIR_BACKWARD){
596
mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
597
mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
598
s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
599
s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
603
assert(s->mv_type == MV_TYPE_FIELD);
604
assert(!s->frame_pred_frame_dct);
605
if (cbp){ // With coded bloc pattern
607
if(s->mv_dir == MV_DIR_FORWARD)
608
put_mb_modes(s, 6, 3, 1, 1);
610
put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);
613
put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);
615
}else{ // No coded bloc pattern
616
put_bits(&s->pb, 5-s->mv_dir, 2);
617
put_bits(&s->pb, 2, 1); /* motion_type: field */
618
s->qscale -= s->dquant;
620
s->misc_bits += get_bits_diff(s);
621
if (s->mv_dir&MV_DIR_FORWARD){
623
put_bits(&s->pb, 1, s->field_select[0][i]);
624
mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
625
mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
626
s->last_mv[0][i][0]= s->mv[0][i][0];
627
s->last_mv[0][i][1]= 2*s->mv[0][i][1];
631
if (s->mv_dir&MV_DIR_BACKWARD){
633
put_bits(&s->pb, 1, s->field_select[1][i]);
634
mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
635
mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
636
s->last_mv[1][i][0]= s->mv[1][i][0];
637
s->last_mv[1][i][1]= 2*s->mv[1][i][1];
642
s->mv_bits += get_bits_diff(s);
644
if (s->chroma_y_shift) {
645
put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
647
put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
648
put_sbits(&s->pb, 2, cbp);
652
for(i=0;i<mb_block_count;i++) {
653
if (cbp & (1 << (mb_block_count - 1 - i))) {
654
mpeg1_encode_block(s, block[i], i);
659
s->i_tex_bits+= get_bits_diff(s);
661
s->p_tex_bits+= get_bits_diff(s);
665
void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
667
if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
668
else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
671
// RAL: Parameter added: f_or_b_code
672
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
677
ff_mpeg12_mbMotionVectorTable[0][1],
678
ff_mpeg12_mbMotionVectorTable[0][0]);
680
int code, sign, bits;
681
int bit_size = f_or_b_code - 1;
682
int range = 1 << bit_size;
683
/* modulo encoding */
684
int l= INT_BIT - 5 - bit_size;
689
code = (val >> bit_size) + 1;
690
bits = val & (range - 1);
695
code = (val >> bit_size) + 1;
696
bits = val & (range - 1);
700
assert(code > 0 && code <= 16);
703
ff_mpeg12_mbMotionVectorTable[code][1],
704
ff_mpeg12_mbMotionVectorTable[code][0]);
706
put_bits(&s->pb, 1, sign);
708
put_bits(&s->pb, bit_size, bits);
713
void ff_mpeg1_encode_init(MpegEncContext *s)
717
ff_mpeg12_common_init(s);
725
init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
726
init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
730
mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i];
731
mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i];
734
init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
735
if(s->intra_vlc_format)
736
init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
738
/* build unified dc encoding tables */
739
for(i=-255; i<256; i++)
747
index = av_log2(2*adiff);
749
bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;
750
code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
751
mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
753
bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;
754
code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
755
mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
758
for(f_code=1; f_code<=MAX_FCODE; f_code++){
759
for(mv=-MAX_MV; mv<=MAX_MV; mv++){
762
if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];
764
int val, bit_size, range, code;
766
bit_size = f_code - 1;
767
range = 1 << bit_size;
773
code = (val >> bit_size) + 1;
775
len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;
777
len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;
781
mv_penalty[f_code][mv+MAX_MV]= len;
786
for(f_code=MAX_FCODE; f_code>0; f_code--){
787
for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
788
fcode_tab[mv+MAX_MV]= f_code;
792
s->me.mv_penalty= mv_penalty;
793
s->fcode_tab= fcode_tab;
794
if(s->codec_id == CODEC_ID_MPEG1VIDEO){
801
if (s->intra_vlc_format) {
802
s->intra_ac_vlc_length=
803
s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
805
s->intra_ac_vlc_length=
806
s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
808
s->inter_ac_vlc_length=
809
s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
812
static inline void encode_dc(MpegEncContext *s, int diff, int component)
814
if(((unsigned) (diff+255)) >= 511){
818
index= av_log2_16bit(-2*diff);
821
index= av_log2_16bit(2*diff);
823
if (component == 0) {
826
ff_mpeg12_vlc_dc_lum_bits[index] + index,
827
(ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
831
ff_mpeg12_vlc_dc_chroma_bits[index] + index,
832
(ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
835
if (component == 0) {
838
mpeg1_lum_dc_uni[diff+255]&0xFF,
839
mpeg1_lum_dc_uni[diff+255]>>8);
843
mpeg1_chr_dc_uni[diff+255]&0xFF,
844
mpeg1_chr_dc_uni[diff+255]>>8);
849
static void mpeg1_encode_block(MpegEncContext *s,
853
int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
855
const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
857
last_index = s->block_last_index[n];
861
component = (n <= 3 ? 0 : (n&1) + 1);
862
dc = block[0]; /* overflow is impossible */
863
diff = dc - s->last_dc[component];
864
encode_dc(s, diff, component);
865
s->last_dc[component] = dc;
867
if (s->intra_vlc_format)
868
table_vlc = ff_rl_mpeg2.table_vlc;
870
/* encode the first coefficient : needs to be done here because
871
it is handled slightly differently */
873
if (abs(level) == 1) {
874
code = ((uint32_t)level >> 31); /* the sign bit */
875
put_bits(&s->pb, 2, code | 0x02);
884
/* now quantify & encode AC coefs */
885
last_non_zero = i - 1;
887
for(;i<=last_index;i++) {
888
j = s->intra_scantable.permutated[i];
893
dprintf(s->avctx, "level[%d]=%d\n", i, level);
895
/* encode using VLC */
897
run = i - last_non_zero - 1;
900
MASK_ABS(sign, alevel)
903
if (alevel <= mpeg1_max_level[0][run]){
904
code= mpeg1_index_run[0][run] + alevel - 1;
905
/* store the vlc & sign at once */
906
put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
908
/* escape seems to be pretty rare <5% so I do not optimize it */
909
put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
910
/* escape: only clip in this case */
911
put_bits(&s->pb, 6, run);
912
if(s->codec_id == CODEC_ID_MPEG1VIDEO){
914
put_sbits(&s->pb, 8, level);
917
put_bits(&s->pb, 16, 0x8001 + level + 255);
919
put_sbits(&s->pb, 16, level);
923
put_sbits(&s->pb, 12, level);
930
put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
933
AVCodec mpeg1video_encoder = {
937
sizeof(MpegEncContext),
941
.supported_framerates= ff_frame_rate_tab+1,
942
.pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
943
.capabilities= CODEC_CAP_DELAY,
944
.long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
947
AVCodec mpeg2video_encoder = {
951
sizeof(MpegEncContext),
955
.supported_framerates= ff_frame_rate_tab+1,
956
.pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE},
957
.capabilities= CODEC_CAP_DELAY,
958
.long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"),