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
31 #include "mpegvideo.h"
34 #include "mpeg12data.h"
35 #include "bytestream.h"
37 #include "libavutil/log.h"
38 #include "libavutil/opt.h"
39 #include "libavutil/avassert.h"
41 static const uint8_t inv_non_linear_qscale[13] = {
43 9,10,11,12,13,14,15,16,
46 static const uint8_t svcd_scan_offset_placeholder[14] = {
54 static void mpeg1_encode_block(MpegEncContext *s,
57 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
59 static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
60 static uint8_t fcode_tab[MAX_MV*2+1];
62 static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
63 static uint8_t uni_mpeg2_ac_vlc_len [64*64*2];
65 /* simple include everything table for dc, first byte is bits number next 3 are code*/
66 static uint32_t mpeg1_lum_dc_uni[512];
67 static uint32_t mpeg1_chr_dc_uni[512];
69 static uint8_t mpeg1_index_run[2][64];
70 static int8_t mpeg1_max_level[2][64];
72 static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
80 for(run=0; run<64; run++){
83 int alevel= FFABS(level);
85 if (alevel > rl->max_level[0][run])
88 code= rl->index_run[0][run] + alevel - 1;
90 if (code < 111 /* rl->n */) {
91 /* length of vlc and sign */
92 len= rl->table_vlc[code][1]+1;
94 len= rl->table_vlc[111/*rl->n*/][1]+6;
103 uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
109 static int find_frame_rate_index(MpegEncContext *s){
111 int64_t dmin= INT64_MAX;
115 int64_t n0= 1001LL/avpriv_frame_rate_tab[i].den*avpriv_frame_rate_tab[i].num*s->avctx->time_base.num;
116 int64_t n1= 1001LL*s->avctx->time_base.den;
117 if(s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && i>=9) break;
122 s->frame_rate_index= i;
131 static av_cold int encode_init(AVCodecContext *avctx)
133 MpegEncContext *s = avctx->priv_data;
135 if(MPV_encode_init(avctx) < 0)
138 #if FF_API_MPEGVIDEO_GLOBAL_OPTS
139 if (avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE)
140 s->drop_frame_timecode = 1;
141 if (avctx->flags & CODEC_FLAG_SVCD_SCAN_OFFSET)
145 if(find_frame_rate_index(s) < 0){
146 if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
147 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
150 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);
154 if(avctx->profile == FF_PROFILE_UNKNOWN){
155 if(avctx->level != FF_LEVEL_UNKNOWN){
156 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
159 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
162 if(avctx->level == FF_LEVEL_UNKNOWN){
163 if(avctx->profile == 0){ /* 4:2:2 */
164 if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
165 else avctx->level = 2; /* High */
167 if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
168 av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
171 if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
172 else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */
173 else avctx->level = 4; /* High */
177 s->drop_frame_timecode = s->tc.drop = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
178 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
179 av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
184 s->tc.rate = avpriv_frame_rate_tab[s->frame_rate_index];
185 if (avpriv_init_smpte_timecode(s, &s->tc) < 0)
187 s->drop_frame_timecode = s->tc.drop;
188 s->avctx->timecode_frame_start = s->tc.start;
190 s->avctx->timecode_frame_start = 0; // default is -1
195 static void put_header(MpegEncContext *s, int header)
197 avpriv_align_put_bits(&s->pb);
198 put_bits(&s->pb, 16, header>>16);
199 put_sbits(&s->pb, 16, header);
202 /* put sequence header if needed */
203 static void mpeg1_encode_sequence_header(MpegEncContext *s)
205 unsigned int vbv_buffer_size;
209 float best_aspect_error= 1E10;
210 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
211 int constraint_parameter_flag;
213 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
215 if (s->current_picture.f.key_frame) {
216 AVRational framerate= avpriv_frame_rate_tab[s->frame_rate_index];
218 /* mpeg1 header repeated every gop */
219 put_header(s, SEQ_START_CODE);
221 put_sbits(&s->pb, 12, s->width );
222 put_sbits(&s->pb, 12, s->height);
225 float error= aspect_ratio;
226 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
227 error-= 1.0/ff_mpeg1_aspect[i];
229 error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width;
233 if(error < best_aspect_error){
234 best_aspect_error= error;
235 s->aspect_ratio_info= i;
239 put_bits(&s->pb, 4, s->aspect_ratio_info);
240 put_bits(&s->pb, 4, s->frame_rate_index);
242 if(s->avctx->rc_max_rate){
243 v = (s->avctx->rc_max_rate + 399) / 400;
244 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
250 if(s->avctx->rc_buffer_size)
251 vbv_buffer_size = s->avctx->rc_buffer_size;
253 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
254 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
255 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
257 put_sbits(&s->pb, 18, v);
258 put_bits(&s->pb, 1, 1); /* marker */
259 put_sbits(&s->pb, 10, vbv_buffer_size);
261 constraint_parameter_flag=
262 s->width <= 768 && s->height <= 576 &&
263 s->mb_width * s->mb_height <= 396 &&
264 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
265 framerate.num <= framerate.den*30 &&
266 s->avctx->me_range && s->avctx->me_range < 128 &&
267 vbv_buffer_size <= 20 &&
269 s->codec_id == CODEC_ID_MPEG1VIDEO;
271 put_bits(&s->pb, 1, constraint_parameter_flag);
273 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
274 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
276 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
277 put_header(s, EXT_START_CODE);
278 put_bits(&s->pb, 4, 1); //seq ext
280 put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
282 put_bits(&s->pb, 3, s->avctx->profile); //profile
283 put_bits(&s->pb, 4, s->avctx->level); //level
285 put_bits(&s->pb, 1, s->progressive_sequence);
286 put_bits(&s->pb, 2, s->chroma_format);
287 put_bits(&s->pb, 2, s->width >>12);
288 put_bits(&s->pb, 2, s->height>>12);
289 put_bits(&s->pb, 12, v>>18); //bitrate ext
290 put_bits(&s->pb, 1, 1); //marker
291 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
292 put_bits(&s->pb, 1, s->low_delay);
293 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
294 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
297 put_header(s, GOP_START_CODE);
298 put_bits(&s->pb, 1, s->drop_frame_timecode); /* drop frame flag */
299 /* time code : we must convert from the real frame rate to a
300 fake mpeg frame rate in case of low frame rate */
301 fps = (framerate.num + framerate.den/2)/ framerate.den;
302 time_code = s->current_picture_ptr->f.coded_picture_number + s->avctx->timecode_frame_start;
304 s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
305 av_assert0(s->drop_frame_timecode == s->tc.drop);
307 time_code = avpriv_framenum_to_drop_timecode(time_code);
308 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
309 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
310 put_bits(&s->pb, 1, 1);
311 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
312 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
313 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
314 put_bits(&s->pb, 1, 0); /* broken link */
318 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
320 put_bits(&s->pb, 11, 0x008);
323 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
324 ff_mpeg12_mbAddrIncrTable[run][0]);
327 static av_always_inline void put_qscale(MpegEncContext *s)
330 assert(s->qscale>=1 && s->qscale <=12);
331 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
333 put_bits(&s->pb, 5, s->qscale);
337 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
338 if (s->height > 2800) {
339 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
340 put_bits(&s->pb, 3, s->mb_y >> 7); /* slice_vertical_position_extension */
342 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
345 put_bits(&s->pb, 1, 0); /* slice extra information */
348 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
350 mpeg1_encode_sequence_header(s);
352 /* mpeg1 picture header */
353 put_header(s, PICTURE_START_CODE);
354 /* temporal reference */
356 // RAL: s->picture_number instead of s->fake_picture_number
357 put_bits(&s->pb, 10, (s->picture_number -
358 s->gop_picture_number) & 0x3ff);
359 put_bits(&s->pb, 3, s->pict_type);
361 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
362 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
364 // RAL: Forward f_code also needed for B frames
365 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
366 put_bits(&s->pb, 1, 0); /* half pel coordinates */
367 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
368 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
370 put_bits(&s->pb, 3, 7); /* forward_f_code */
373 // RAL: Backward f_code necessary for B frames
374 if (s->pict_type == AV_PICTURE_TYPE_B) {
375 put_bits(&s->pb, 1, 0); /* half pel coordinates */
376 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
377 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
379 put_bits(&s->pb, 3, 7); /* backward_f_code */
382 put_bits(&s->pb, 1, 0); /* extra bit picture */
384 s->frame_pred_frame_dct = 1;
385 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
386 put_header(s, EXT_START_CODE);
387 put_bits(&s->pb, 4, 8); //pic ext
388 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
389 put_bits(&s->pb, 4, s->f_code);
390 put_bits(&s->pb, 4, s->f_code);
392 put_bits(&s->pb, 8, 255);
394 if (s->pict_type == AV_PICTURE_TYPE_B) {
395 put_bits(&s->pb, 4, s->b_code);
396 put_bits(&s->pb, 4, s->b_code);
398 put_bits(&s->pb, 8, 255);
400 put_bits(&s->pb, 2, s->intra_dc_precision);
402 assert(s->picture_structure == PICT_FRAME);
403 put_bits(&s->pb, 2, s->picture_structure);
404 if (s->progressive_sequence) {
405 put_bits(&s->pb, 1, 0); /* no repeat */
407 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
409 /* XXX: optimize the generation of this flag with entropy
411 s->frame_pred_frame_dct = s->progressive_sequence;
413 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
414 put_bits(&s->pb, 1, s->concealment_motion_vectors);
415 put_bits(&s->pb, 1, s->q_scale_type);
416 put_bits(&s->pb, 1, s->intra_vlc_format);
417 put_bits(&s->pb, 1, s->alternate_scan);
418 put_bits(&s->pb, 1, s->repeat_first_field);
419 s->progressive_frame = s->progressive_sequence;
420 put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
421 put_bits(&s->pb, 1, s->progressive_frame);
422 put_bits(&s->pb, 1, 0); //composite_display_flag
424 if (s->scan_offset) {
427 put_header(s, USER_START_CODE);
428 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
429 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
434 ff_mpeg1_encode_slice_header(s);
437 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
438 int has_mv, int field_motion)
440 put_bits(&s->pb, n, bits);
441 if (!s->frame_pred_frame_dct) {
443 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
444 put_bits(&s->pb, 1, s->interlaced_dct);
448 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
449 DCTELEM block[6][64],
450 int motion_x, int motion_y,
454 const int mb_x = s->mb_x;
455 const int mb_y = s->mb_y;
456 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
460 for(i=0;i<mb_block_count;i++) {
461 if (s->block_last_index[i] >= 0)
462 cbp |= 1 << (mb_block_count - 1 - i);
465 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
466 (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
467 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
468 (s->pict_type == AV_PICTURE_TYPE_B && 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) |
469 ((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))) {
471 s->qscale -= s->dquant;
475 if(s->pict_type == AV_PICTURE_TYPE_P){
476 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
477 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
481 assert(s->mb_skip_run == 0);
482 encode_mb_skip_run(s, s->mb_x);
484 encode_mb_skip_run(s, s->mb_skip_run);
487 if (s->pict_type == AV_PICTURE_TYPE_I) {
488 if(s->dquant && cbp){
489 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
492 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
493 s->qscale -= s->dquant;
495 s->misc_bits+= get_bits_diff(s);
497 } else if (s->mb_intra) {
498 if(s->dquant && cbp){
499 put_mb_modes(s, 6, 0x01, 0, 0);
502 put_mb_modes(s, 5, 0x03, 0, 0);
503 s->qscale -= s->dquant;
505 s->misc_bits+= get_bits_diff(s);
507 memset(s->last_mv, 0, sizeof(s->last_mv));
508 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
509 if(s->mv_type == MV_TYPE_16X16){
511 if ((motion_x|motion_y) == 0) {
513 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
516 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
518 s->misc_bits+= get_bits_diff(s);
521 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
524 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
526 s->misc_bits+= get_bits_diff(s);
527 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
528 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
529 s->mv_bits+= get_bits_diff(s);
532 put_bits(&s->pb, 3, 1); /* motion only */
533 if (!s->frame_pred_frame_dct)
534 put_bits(&s->pb, 2, 2); /* motion_type: frame */
535 s->misc_bits+= get_bits_diff(s);
536 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
537 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
538 s->qscale -= s->dquant;
539 s->mv_bits+= get_bits_diff(s);
541 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
542 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
544 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
548 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
551 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
554 put_bits(&s->pb, 3, 1); /* motion only */
555 put_bits(&s->pb, 2, 1); /* motion_type: field */
556 s->qscale -= s->dquant;
558 s->misc_bits+= get_bits_diff(s);
560 put_bits(&s->pb, 1, s->field_select[0][i]);
561 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
562 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
563 s->last_mv[0][i][0]= s->mv[0][i][0];
564 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
566 s->mv_bits+= get_bits_diff(s);
569 if (s->chroma_y_shift) {
570 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
572 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
573 put_sbits(&s->pb, 2, cbp);
578 if(s->mv_type == MV_TYPE_16X16){
579 if (cbp){ // With coded bloc pattern
581 if(s->mv_dir == MV_DIR_FORWARD)
582 put_mb_modes(s, 6, 3, 1, 0);
584 put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);
587 put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);
589 }else{ // No coded bloc pattern
590 put_bits(&s->pb, 5-s->mv_dir, 2);
591 if (!s->frame_pred_frame_dct)
592 put_bits(&s->pb, 2, 2); /* motion_type: frame */
593 s->qscale -= s->dquant;
595 s->misc_bits += get_bits_diff(s);
596 if (s->mv_dir&MV_DIR_FORWARD){
597 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
598 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
599 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
600 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
603 if (s->mv_dir&MV_DIR_BACKWARD){
604 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
605 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
606 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
607 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
611 assert(s->mv_type == MV_TYPE_FIELD);
612 assert(!s->frame_pred_frame_dct);
613 if (cbp){ // With coded bloc pattern
615 if(s->mv_dir == MV_DIR_FORWARD)
616 put_mb_modes(s, 6, 3, 1, 1);
618 put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);
621 put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);
623 }else{ // No coded bloc pattern
624 put_bits(&s->pb, 5-s->mv_dir, 2);
625 put_bits(&s->pb, 2, 1); /* motion_type: field */
626 s->qscale -= s->dquant;
628 s->misc_bits += get_bits_diff(s);
629 if (s->mv_dir&MV_DIR_FORWARD){
631 put_bits(&s->pb, 1, s->field_select[0][i]);
632 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
633 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
634 s->last_mv[0][i][0]= s->mv[0][i][0];
635 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
639 if (s->mv_dir&MV_DIR_BACKWARD){
641 put_bits(&s->pb, 1, s->field_select[1][i]);
642 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
643 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
644 s->last_mv[1][i][0]= s->mv[1][i][0];
645 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
650 s->mv_bits += get_bits_diff(s);
652 if (s->chroma_y_shift) {
653 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
655 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
656 put_sbits(&s->pb, 2, cbp);
660 for(i=0;i<mb_block_count;i++) {
661 if (cbp & (1 << (mb_block_count - 1 - i))) {
662 mpeg1_encode_block(s, block[i], i);
667 s->i_tex_bits+= get_bits_diff(s);
669 s->p_tex_bits+= get_bits_diff(s);
673 void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
675 if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
676 else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
679 // RAL: Parameter added: f_or_b_code
680 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
685 ff_mpeg12_mbMotionVectorTable[0][1],
686 ff_mpeg12_mbMotionVectorTable[0][0]);
688 int code, sign, bits;
689 int bit_size = f_or_b_code - 1;
690 int range = 1 << bit_size;
691 /* modulo encoding */
692 val = sign_extend(val, 5 + bit_size);
696 code = (val >> bit_size) + 1;
697 bits = val & (range - 1);
702 code = (val >> bit_size) + 1;
703 bits = val & (range - 1);
707 assert(code > 0 && code <= 16);
710 ff_mpeg12_mbMotionVectorTable[code][1],
711 ff_mpeg12_mbMotionVectorTable[code][0]);
713 put_bits(&s->pb, 1, sign);
715 put_bits(&s->pb, bit_size, bits);
720 void ff_mpeg1_encode_init(MpegEncContext *s)
724 ff_mpeg12_common_init(s);
732 init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
733 init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
737 mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i];
738 mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i];
741 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
742 if(s->intra_vlc_format)
743 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
745 /* build unified dc encoding tables */
746 for(i=-255; i<256; i++)
754 index = av_log2(2*adiff);
756 bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;
757 code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
758 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
760 bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;
761 code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
762 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
765 for(f_code=1; f_code<=MAX_FCODE; f_code++){
766 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
769 if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];
771 int val, bit_size, code;
773 bit_size = f_code - 1;
779 code = (val >> bit_size) + 1;
781 len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;
783 len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;
787 mv_penalty[f_code][mv+MAX_MV]= len;
792 for(f_code=MAX_FCODE; f_code>0; f_code--){
793 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
794 fcode_tab[mv+MAX_MV]= f_code;
798 s->me.mv_penalty= mv_penalty;
799 s->fcode_tab= fcode_tab;
800 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
807 if (s->intra_vlc_format) {
808 s->intra_ac_vlc_length=
809 s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
811 s->intra_ac_vlc_length=
812 s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
814 s->inter_ac_vlc_length=
815 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
818 static inline void encode_dc(MpegEncContext *s, int diff, int component)
820 if(((unsigned) (diff+255)) >= 511){
824 index= av_log2_16bit(-2*diff);
827 index= av_log2_16bit(2*diff);
829 if (component == 0) {
832 ff_mpeg12_vlc_dc_lum_bits[index] + index,
833 (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
837 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
838 (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
841 if (component == 0) {
844 mpeg1_lum_dc_uni[diff+255]&0xFF,
845 mpeg1_lum_dc_uni[diff+255]>>8);
849 mpeg1_chr_dc_uni[diff+255]&0xFF,
850 mpeg1_chr_dc_uni[diff+255]>>8);
855 static void mpeg1_encode_block(MpegEncContext *s,
859 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
861 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
863 last_index = s->block_last_index[n];
867 component = (n <= 3 ? 0 : (n&1) + 1);
868 dc = block[0]; /* overflow is impossible */
869 diff = dc - s->last_dc[component];
870 encode_dc(s, diff, component);
871 s->last_dc[component] = dc;
873 if (s->intra_vlc_format)
874 table_vlc = ff_rl_mpeg2.table_vlc;
876 /* encode the first coefficient : needs to be done here because
877 it is handled slightly differently */
879 if (abs(level) == 1) {
880 code = ((uint32_t)level >> 31); /* the sign bit */
881 put_bits(&s->pb, 2, code | 0x02);
890 /* now quantify & encode AC coefs */
891 last_non_zero = i - 1;
893 for(;i<=last_index;i++) {
894 j = s->intra_scantable.permutated[i];
897 /* encode using VLC */
899 run = i - last_non_zero - 1;
902 MASK_ABS(sign, alevel)
905 if (alevel <= mpeg1_max_level[0][run]){
906 code= mpeg1_index_run[0][run] + alevel - 1;
907 /* store the vlc & sign at once */
908 put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
910 /* escape seems to be pretty rare <5% so I do not optimize it */
911 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
912 /* escape: only clip in this case */
913 put_bits(&s->pb, 6, run);
914 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
916 put_sbits(&s->pb, 8, level);
919 put_bits(&s->pb, 16, 0x8001 + level + 255);
921 put_sbits(&s->pb, 16, level);
925 put_sbits(&s->pb, 12, level);
932 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
935 #define OFFSET(x) offsetof(MpegEncContext, x)
936 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
938 {TIMECODE_OPT(MpegEncContext,\
939 AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)},\
940 { "intra_vlc", "Use MPEG-2 intra VLC table.", OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },\
941 { "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE}, \
942 { "scan_offset", "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
944 static const AVOption mpeg1_options[] = {
949 static const AVOption mpeg2_options[] = {
951 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
952 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
956 #define mpeg12_class(x)\
957 static const AVClass mpeg## x ##_class = {\
958 .class_name = "mpeg" #x "video encoder",\
959 .item_name = av_default_item_name,\
960 .option = mpeg## x ##_options,\
961 .version = LIBAVUTIL_VERSION_INT,\
967 AVCodec ff_mpeg1video_encoder = {
968 .name = "mpeg1video",
969 .type = AVMEDIA_TYPE_VIDEO,
970 .id = CODEC_ID_MPEG1VIDEO,
971 .priv_data_size = sizeof(MpegEncContext),
973 .encode = MPV_encode_picture,
974 .close = MPV_encode_end,
975 .supported_framerates= avpriv_frame_rate_tab+1,
976 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
977 .capabilities= CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
978 .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
979 .priv_class = &mpeg1_class,
982 AVCodec ff_mpeg2video_encoder = {
983 .name = "mpeg2video",
984 .type = AVMEDIA_TYPE_VIDEO,
985 .id = CODEC_ID_MPEG2VIDEO,
986 .priv_data_size = sizeof(MpegEncContext),
988 .encode = MPV_encode_picture,
989 .close = MPV_encode_end,
990 .supported_framerates= avpriv_frame_rate_tab+1,
991 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE},
992 .capabilities= CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
993 .long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"),
994 .priv_class = &mpeg2_class,