3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of Libav.
8 * Libav 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 * Libav 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 Libav; 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"
36 #include "libavutil/attributes.h"
37 #include "libavutil/log.h"
38 #include "libavutil/opt.h"
40 static const uint8_t inv_non_linear_qscale[13] = {
42 9,10,11,12,13,14,15,16,
45 static const uint8_t svcd_scan_offset_placeholder[14] = {
53 static void mpeg1_encode_block(MpegEncContext *s,
56 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
58 static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
59 static uint8_t fcode_tab[MAX_MV*2+1];
61 static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
62 static uint8_t uni_mpeg2_ac_vlc_len [64*64*2];
64 /* simple include everything table for dc, first byte is bits number next 3 are code*/
65 static uint32_t mpeg1_lum_dc_uni[512];
66 static uint32_t mpeg1_chr_dc_uni[512];
68 static uint8_t mpeg1_index_run[2][64];
69 static int8_t mpeg1_max_level[2][64];
71 static av_cold 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 / ff_mpeg12_frame_rate_tab[i].den * ff_mpeg12_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(ff_MPV_encode_init(avctx) < 0)
138 if(find_frame_rate_index(s) < 0){
139 if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
140 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
143 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);
147 if(avctx->profile == FF_PROFILE_UNKNOWN){
148 if(avctx->level != FF_LEVEL_UNKNOWN){
149 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
152 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
155 if(avctx->level == FF_LEVEL_UNKNOWN){
156 if(avctx->profile == 0){ /* 4:2:2 */
157 if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
158 else avctx->level = 2; /* High */
160 if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
161 av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
164 if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
165 else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */
166 else avctx->level = 4; /* High */
170 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
171 av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
178 static void put_header(MpegEncContext *s, int header)
180 avpriv_align_put_bits(&s->pb);
181 put_bits(&s->pb, 16, header>>16);
182 put_sbits(&s->pb, 16, header);
185 /* put sequence header if needed */
186 static void mpeg1_encode_sequence_header(MpegEncContext *s)
188 unsigned int vbv_buffer_size;
192 float best_aspect_error= 1E10;
193 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
194 int constraint_parameter_flag;
196 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
198 if (s->current_picture.f.key_frame) {
199 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
201 /* mpeg1 header repeated every gop */
202 put_header(s, SEQ_START_CODE);
204 put_sbits(&s->pb, 12, s->width );
205 put_sbits(&s->pb, 12, s->height);
208 float error= aspect_ratio;
209 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <=1)
210 error-= 1.0/ff_mpeg1_aspect[i];
212 error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width;
216 if(error < best_aspect_error){
217 best_aspect_error= error;
218 s->aspect_ratio_info= i;
222 put_bits(&s->pb, 4, s->aspect_ratio_info);
223 put_bits(&s->pb, 4, s->frame_rate_index);
225 if(s->avctx->rc_max_rate){
226 v = (s->avctx->rc_max_rate + 399) / 400;
227 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
233 if(s->avctx->rc_buffer_size)
234 vbv_buffer_size = s->avctx->rc_buffer_size;
236 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
237 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
238 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
240 put_sbits(&s->pb, 18, v);
241 put_bits(&s->pb, 1, 1); /* marker */
242 put_sbits(&s->pb, 10, vbv_buffer_size);
244 constraint_parameter_flag=
245 s->width <= 768 && s->height <= 576 &&
246 s->mb_width * s->mb_height <= 396 &&
247 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
248 framerate.num <= framerate.den*30 &&
249 s->avctx->me_range && s->avctx->me_range < 128 &&
250 vbv_buffer_size <= 20 &&
252 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
254 put_bits(&s->pb, 1, constraint_parameter_flag);
256 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
257 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
259 if(s->codec_id == AV_CODEC_ID_MPEG2VIDEO){
260 put_header(s, EXT_START_CODE);
261 put_bits(&s->pb, 4, 1); //seq ext
263 put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
265 put_bits(&s->pb, 3, s->avctx->profile); //profile
266 put_bits(&s->pb, 4, s->avctx->level); //level
268 put_bits(&s->pb, 1, s->progressive_sequence);
269 put_bits(&s->pb, 2, s->chroma_format);
270 put_bits(&s->pb, 2, s->width >>12);
271 put_bits(&s->pb, 2, s->height>>12);
272 put_bits(&s->pb, 12, v>>18); //bitrate ext
273 put_bits(&s->pb, 1, 1); //marker
274 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
275 put_bits(&s->pb, 1, s->low_delay);
276 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
277 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
280 put_header(s, GOP_START_CODE);
281 put_bits(&s->pb, 1, s->drop_frame_timecode); /* drop frame flag */
282 /* time code : we must convert from the real frame rate to a
283 fake mpeg frame rate in case of low frame rate */
284 fps = (framerate.num + framerate.den/2)/ framerate.den;
285 time_code = s->current_picture_ptr->f.coded_picture_number + s->avctx->timecode_frame_start;
287 s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
288 if (s->drop_frame_timecode) {
289 /* only works for NTSC 29.97 */
290 int d = time_code / 17982;
291 int m = time_code % 17982;
292 //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
293 time_code += 18 * d + 2 * ((m - 2) / 1798);
295 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
296 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
297 put_bits(&s->pb, 1, 1);
298 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
299 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
300 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
301 put_bits(&s->pb, 1, 0); /* broken link */
305 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
307 put_bits(&s->pb, 11, 0x008);
310 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
311 ff_mpeg12_mbAddrIncrTable[run][0]);
314 static av_always_inline void put_qscale(MpegEncContext *s)
317 assert(s->qscale>=1 && s->qscale <=12);
318 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
320 put_bits(&s->pb, 5, s->qscale);
324 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
325 if (s->height > 2800) {
326 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
327 put_bits(&s->pb, 3, s->mb_y >> 7); /* slice_vertical_position_extension */
329 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
332 put_bits(&s->pb, 1, 0); /* slice extra information */
335 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
337 mpeg1_encode_sequence_header(s);
339 /* mpeg1 picture header */
340 put_header(s, PICTURE_START_CODE);
341 /* temporal reference */
343 // RAL: s->picture_number instead of s->fake_picture_number
344 put_bits(&s->pb, 10, (s->picture_number -
345 s->gop_picture_number) & 0x3ff);
346 put_bits(&s->pb, 3, s->pict_type);
348 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
349 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
351 // RAL: Forward f_code also needed for B frames
352 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
353 put_bits(&s->pb, 1, 0); /* half pel coordinates */
354 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
355 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
357 put_bits(&s->pb, 3, 7); /* forward_f_code */
360 // RAL: Backward f_code necessary for B frames
361 if (s->pict_type == AV_PICTURE_TYPE_B) {
362 put_bits(&s->pb, 1, 0); /* half pel coordinates */
363 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
364 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
366 put_bits(&s->pb, 3, 7); /* backward_f_code */
369 put_bits(&s->pb, 1, 0); /* extra bit picture */
371 s->frame_pred_frame_dct = 1;
372 if(s->codec_id == AV_CODEC_ID_MPEG2VIDEO){
373 put_header(s, EXT_START_CODE);
374 put_bits(&s->pb, 4, 8); //pic ext
375 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
376 put_bits(&s->pb, 4, s->f_code);
377 put_bits(&s->pb, 4, s->f_code);
379 put_bits(&s->pb, 8, 255);
381 if (s->pict_type == AV_PICTURE_TYPE_B) {
382 put_bits(&s->pb, 4, s->b_code);
383 put_bits(&s->pb, 4, s->b_code);
385 put_bits(&s->pb, 8, 255);
387 put_bits(&s->pb, 2, s->intra_dc_precision);
389 assert(s->picture_structure == PICT_FRAME);
390 put_bits(&s->pb, 2, s->picture_structure);
391 if (s->progressive_sequence) {
392 put_bits(&s->pb, 1, 0); /* no repeat */
394 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
396 /* XXX: optimize the generation of this flag with entropy
398 s->frame_pred_frame_dct = s->progressive_sequence;
400 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
401 put_bits(&s->pb, 1, s->concealment_motion_vectors);
402 put_bits(&s->pb, 1, s->q_scale_type);
403 put_bits(&s->pb, 1, s->intra_vlc_format);
404 put_bits(&s->pb, 1, s->alternate_scan);
405 put_bits(&s->pb, 1, s->repeat_first_field);
406 s->progressive_frame = s->progressive_sequence;
407 put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
408 put_bits(&s->pb, 1, s->progressive_frame);
409 put_bits(&s->pb, 1, 0); //composite_display_flag
411 if (s->scan_offset) {
414 put_header(s, USER_START_CODE);
415 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
416 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
421 ff_mpeg1_encode_slice_header(s);
424 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
425 int has_mv, int field_motion)
427 put_bits(&s->pb, n, bits);
428 if (!s->frame_pred_frame_dct) {
430 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
431 put_bits(&s->pb, 1, s->interlaced_dct);
435 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
436 int16_t block[6][64],
437 int motion_x, int motion_y,
441 const int mb_x = s->mb_x;
442 const int mb_y = s->mb_y;
443 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
447 for(i=0;i<mb_block_count;i++) {
448 if (s->block_last_index[i] >= 0)
449 cbp |= 1 << (mb_block_count - 1 - i);
452 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
453 (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
454 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
455 (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) |
456 ((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))) {
458 s->qscale -= s->dquant;
462 if(s->pict_type == AV_PICTURE_TYPE_P){
463 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
464 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
468 assert(s->mb_skip_run == 0);
469 encode_mb_skip_run(s, s->mb_x);
471 encode_mb_skip_run(s, s->mb_skip_run);
474 if (s->pict_type == AV_PICTURE_TYPE_I) {
475 if(s->dquant && cbp){
476 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
479 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
480 s->qscale -= s->dquant;
482 s->misc_bits+= get_bits_diff(s);
484 } else if (s->mb_intra) {
485 if(s->dquant && cbp){
486 put_mb_modes(s, 6, 0x01, 0, 0);
489 put_mb_modes(s, 5, 0x03, 0, 0);
490 s->qscale -= s->dquant;
492 s->misc_bits+= get_bits_diff(s);
494 memset(s->last_mv, 0, sizeof(s->last_mv));
495 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
496 if(s->mv_type == MV_TYPE_16X16){
498 if ((motion_x|motion_y) == 0) {
500 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
503 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
505 s->misc_bits+= get_bits_diff(s);
508 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
511 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
513 s->misc_bits+= get_bits_diff(s);
514 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
515 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
516 s->mv_bits+= get_bits_diff(s);
519 put_bits(&s->pb, 3, 1); /* motion only */
520 if (!s->frame_pred_frame_dct)
521 put_bits(&s->pb, 2, 2); /* motion_type: frame */
522 s->misc_bits+= get_bits_diff(s);
523 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
524 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
525 s->qscale -= s->dquant;
526 s->mv_bits+= get_bits_diff(s);
528 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
529 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
531 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
535 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
538 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
541 put_bits(&s->pb, 3, 1); /* motion only */
542 put_bits(&s->pb, 2, 1); /* motion_type: field */
543 s->qscale -= s->dquant;
545 s->misc_bits+= get_bits_diff(s);
547 put_bits(&s->pb, 1, s->field_select[0][i]);
548 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
549 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
550 s->last_mv[0][i][0]= s->mv[0][i][0];
551 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
553 s->mv_bits+= get_bits_diff(s);
556 if (s->chroma_y_shift) {
557 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
559 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
560 put_sbits(&s->pb, 2, cbp);
565 if(s->mv_type == MV_TYPE_16X16){
566 if (cbp){ // With coded bloc pattern
568 if(s->mv_dir == MV_DIR_FORWARD)
569 put_mb_modes(s, 6, 3, 1, 0);
571 put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);
574 put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);
576 }else{ // No coded bloc pattern
577 put_bits(&s->pb, 5-s->mv_dir, 2);
578 if (!s->frame_pred_frame_dct)
579 put_bits(&s->pb, 2, 2); /* motion_type: frame */
580 s->qscale -= s->dquant;
582 s->misc_bits += get_bits_diff(s);
583 if (s->mv_dir&MV_DIR_FORWARD){
584 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
585 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
586 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
587 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
590 if (s->mv_dir&MV_DIR_BACKWARD){
591 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
592 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
593 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
594 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
598 assert(s->mv_type == MV_TYPE_FIELD);
599 assert(!s->frame_pred_frame_dct);
600 if (cbp){ // With coded bloc pattern
602 if(s->mv_dir == MV_DIR_FORWARD)
603 put_mb_modes(s, 6, 3, 1, 1);
605 put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);
608 put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);
610 }else{ // No coded bloc pattern
611 put_bits(&s->pb, 5-s->mv_dir, 2);
612 put_bits(&s->pb, 2, 1); /* motion_type: field */
613 s->qscale -= s->dquant;
615 s->misc_bits += get_bits_diff(s);
616 if (s->mv_dir&MV_DIR_FORWARD){
618 put_bits(&s->pb, 1, s->field_select[0][i]);
619 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
620 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
621 s->last_mv[0][i][0]= s->mv[0][i][0];
622 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
626 if (s->mv_dir&MV_DIR_BACKWARD){
628 put_bits(&s->pb, 1, s->field_select[1][i]);
629 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
630 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
631 s->last_mv[1][i][0]= s->mv[1][i][0];
632 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
637 s->mv_bits += get_bits_diff(s);
639 if (s->chroma_y_shift) {
640 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
642 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
643 put_sbits(&s->pb, 2, cbp);
647 for(i=0;i<mb_block_count;i++) {
648 if (cbp & (1 << (mb_block_count - 1 - i))) {
649 mpeg1_encode_block(s, block[i], i);
654 s->i_tex_bits+= get_bits_diff(s);
656 s->p_tex_bits+= get_bits_diff(s);
660 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
662 if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
663 else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
666 // RAL: Parameter added: f_or_b_code
667 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
672 ff_mpeg12_mbMotionVectorTable[0][1],
673 ff_mpeg12_mbMotionVectorTable[0][0]);
675 int code, sign, bits;
676 int bit_size = f_or_b_code - 1;
677 int range = 1 << bit_size;
678 /* modulo encoding */
679 val = sign_extend(val, 5 + bit_size);
683 code = (val >> bit_size) + 1;
684 bits = val & (range - 1);
689 code = (val >> bit_size) + 1;
690 bits = val & (range - 1);
694 assert(code > 0 && code <= 16);
697 ff_mpeg12_mbMotionVectorTable[code][1],
698 ff_mpeg12_mbMotionVectorTable[code][0]);
700 put_bits(&s->pb, 1, sign);
702 put_bits(&s->pb, bit_size, bits);
707 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
711 ff_mpeg12_common_init(s);
719 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
720 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
724 mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i];
725 mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i];
728 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
729 if(s->intra_vlc_format)
730 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
732 /* build unified dc encoding tables */
733 for(i=-255; i<256; i++)
741 index = av_log2(2*adiff);
743 bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;
744 code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
745 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
747 bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;
748 code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
749 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
752 for(f_code=1; f_code<=MAX_FCODE; f_code++){
753 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
756 if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];
758 int val, bit_size, code;
760 bit_size = f_code - 1;
766 code = (val >> bit_size) + 1;
768 len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;
770 len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;
774 mv_penalty[f_code][mv+MAX_MV]= len;
779 for(f_code=MAX_FCODE; f_code>0; f_code--){
780 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
781 fcode_tab[mv+MAX_MV]= f_code;
785 s->me.mv_penalty= mv_penalty;
786 s->fcode_tab= fcode_tab;
787 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){
794 if (s->intra_vlc_format) {
795 s->intra_ac_vlc_length=
796 s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
798 s->intra_ac_vlc_length=
799 s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
801 s->inter_ac_vlc_length=
802 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
805 static inline void encode_dc(MpegEncContext *s, int diff, int component)
807 if(((unsigned) (diff+255)) >= 511){
811 index= av_log2_16bit(-2*diff);
814 index= av_log2_16bit(2*diff);
816 if (component == 0) {
819 ff_mpeg12_vlc_dc_lum_bits[index] + index,
820 (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
824 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
825 (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
828 if (component == 0) {
831 mpeg1_lum_dc_uni[diff+255]&0xFF,
832 mpeg1_lum_dc_uni[diff+255]>>8);
836 mpeg1_chr_dc_uni[diff+255]&0xFF,
837 mpeg1_chr_dc_uni[diff+255]>>8);
842 static void mpeg1_encode_block(MpegEncContext *s,
846 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
848 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
850 last_index = s->block_last_index[n];
854 component = (n <= 3 ? 0 : (n&1) + 1);
855 dc = block[0]; /* overflow is impossible */
856 diff = dc - s->last_dc[component];
857 encode_dc(s, diff, component);
858 s->last_dc[component] = dc;
860 if (s->intra_vlc_format)
861 table_vlc = ff_rl_mpeg2.table_vlc;
863 /* encode the first coefficient : needs to be done here because
864 it is handled slightly differently */
866 if (abs(level) == 1) {
867 code = ((uint32_t)level >> 31); /* the sign bit */
868 put_bits(&s->pb, 2, code | 0x02);
877 /* now quantify & encode AC coefs */
878 last_non_zero = i - 1;
880 for(;i<=last_index;i++) {
881 j = s->intra_scantable.permutated[i];
884 /* encode using VLC */
886 run = i - last_non_zero - 1;
889 MASK_ABS(sign, alevel);
892 if (alevel <= mpeg1_max_level[0][run]){
893 code= mpeg1_index_run[0][run] + alevel - 1;
894 /* store the vlc & sign at once */
895 put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
897 /* escape seems to be pretty rare <5% so I do not optimize it */
898 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
899 /* escape: only clip in this case */
900 put_bits(&s->pb, 6, run);
901 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){
903 put_sbits(&s->pb, 8, level);
906 put_bits(&s->pb, 16, 0x8001 + level + 255);
908 put_sbits(&s->pb, 16, level);
912 put_sbits(&s->pb, 12, level);
919 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
922 #define OFFSET(x) offsetof(MpegEncContext, x)
923 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
925 { "intra_vlc", "Use MPEG-2 intra VLC table.", OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },\
926 { "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE}, \
927 { "scan_offset", "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
929 static const AVOption mpeg1_options[] = {
935 static const AVOption mpeg2_options[] = {
937 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
938 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
943 #define mpeg12_class(x)\
944 static const AVClass mpeg## x ##_class = {\
945 .class_name = "mpeg" #x "video encoder",\
946 .item_name = av_default_item_name,\
947 .option = mpeg## x ##_options,\
948 .version = LIBAVUTIL_VERSION_INT,\
954 AVCodec ff_mpeg1video_encoder = {
955 .name = "mpeg1video",
956 .type = AVMEDIA_TYPE_VIDEO,
957 .id = AV_CODEC_ID_MPEG1VIDEO,
958 .priv_data_size = sizeof(MpegEncContext),
960 .encode2 = ff_MPV_encode_picture,
961 .close = ff_MPV_encode_end,
962 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
963 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
965 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
966 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
967 .priv_class = &mpeg1_class,
970 AVCodec ff_mpeg2video_encoder = {
971 .name = "mpeg2video",
972 .type = AVMEDIA_TYPE_VIDEO,
973 .id = AV_CODEC_ID_MPEG2VIDEO,
974 .priv_data_size = sizeof(MpegEncContext),
976 .encode2 = ff_MPV_encode_picture,
977 .close = ff_MPV_encode_end,
978 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
979 .pix_fmts = (const enum AVPixelFormat[]){
980 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE
982 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
983 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
984 .priv_class = &mpeg2_class,