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"
36 #include "libavutil/log.h"
37 #include "libavutil/opt.h"
38 #include "libavutil/avassert.h"
39 #include "libavutil/timecode.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 AVRational bestq= (AVRational){0, 0};
113 AVRational target = av_inv_q(s->avctx->time_base);
116 if(s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && i>=9) break;
118 for (ext.num=1; ext.num <= 4; ext.num++) {
119 for (ext.den=1; ext.den <= 32; ext.den++) {
120 AVRational q = av_mul_q(ext, avpriv_frame_rate_tab[i]);
122 if(s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
124 if(av_gcd(ext.den, ext.num) != 1)
128 || av_nearer_q(target, bestq, q) < 0
129 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0){
131 s->frame_rate_index= i;
132 s->mpeg2_frame_rate_ext.num = ext.num;
133 s->mpeg2_frame_rate_ext.den = ext.den;
138 if(av_cmp_q(target, bestq))
144 static av_cold int encode_init(AVCodecContext *avctx)
146 MpegEncContext *s = avctx->priv_data;
148 if(ff_MPV_encode_init(avctx) < 0)
151 if(find_frame_rate_index(s) < 0){
152 if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
153 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
156 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);
160 if(avctx->profile == FF_PROFILE_UNKNOWN){
161 if(avctx->level != FF_LEVEL_UNKNOWN){
162 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
165 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
168 if(avctx->level == FF_LEVEL_UNKNOWN){
169 if(avctx->profile == 0){ /* 4:2:2 */
170 if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
171 else avctx->level = 2; /* High */
173 if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
174 av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
177 if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
178 else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */
179 else avctx->level = 4; /* High */
183 s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
184 if (s->drop_frame_timecode)
185 s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
186 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
187 av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
192 AVRational rate = avpriv_frame_rate_tab[s->frame_rate_index];
193 int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
196 s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
197 s->avctx->timecode_frame_start = s->tc.start;
199 s->avctx->timecode_frame_start = 0; // default is -1
204 static void put_header(MpegEncContext *s, int header)
206 avpriv_align_put_bits(&s->pb);
207 put_bits(&s->pb, 16, header>>16);
208 put_sbits(&s->pb, 16, header);
211 /* put sequence header if needed */
212 static void mpeg1_encode_sequence_header(MpegEncContext *s)
214 unsigned int vbv_buffer_size;
218 float best_aspect_error= 1E10;
219 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
220 int constraint_parameter_flag;
222 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
224 if (s->current_picture.f.key_frame) {
225 AVRational framerate= avpriv_frame_rate_tab[s->frame_rate_index];
227 /* mpeg1 header repeated every gop */
228 put_header(s, SEQ_START_CODE);
230 put_sbits(&s->pb, 12, s->width );
231 put_sbits(&s->pb, 12, s->height);
234 float error= aspect_ratio;
235 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <=1)
236 error-= 1.0/ff_mpeg1_aspect[i];
238 error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width;
242 if(error < best_aspect_error){
243 best_aspect_error= error;
244 s->aspect_ratio_info= i;
248 put_bits(&s->pb, 4, s->aspect_ratio_info);
249 put_bits(&s->pb, 4, s->frame_rate_index);
251 if(s->avctx->rc_max_rate){
252 v = (s->avctx->rc_max_rate + 399) / 400;
253 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
259 if(s->avctx->rc_buffer_size)
260 vbv_buffer_size = s->avctx->rc_buffer_size;
262 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
263 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
264 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
266 put_sbits(&s->pb, 18, v);
267 put_bits(&s->pb, 1, 1); /* marker */
268 put_sbits(&s->pb, 10, vbv_buffer_size);
270 constraint_parameter_flag=
271 s->width <= 768 && s->height <= 576 &&
272 s->mb_width * s->mb_height <= 396 &&
273 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
274 framerate.num <= framerate.den*30 &&
275 s->avctx->me_range && s->avctx->me_range < 128 &&
276 vbv_buffer_size <= 20 &&
278 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
280 put_bits(&s->pb, 1, constraint_parameter_flag);
282 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
283 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
285 if(s->codec_id == AV_CODEC_ID_MPEG2VIDEO){
286 put_header(s, EXT_START_CODE);
287 put_bits(&s->pb, 4, 1); //seq ext
289 put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
291 put_bits(&s->pb, 3, s->avctx->profile); //profile
292 put_bits(&s->pb, 4, s->avctx->level); //level
294 put_bits(&s->pb, 1, s->progressive_sequence);
295 put_bits(&s->pb, 2, s->chroma_format);
296 put_bits(&s->pb, 2, s->width >>12);
297 put_bits(&s->pb, 2, s->height>>12);
298 put_bits(&s->pb, 12, v>>18); //bitrate ext
299 put_bits(&s->pb, 1, 1); //marker
300 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
301 put_bits(&s->pb, 1, s->low_delay);
302 put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
303 put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
306 put_header(s, GOP_START_CODE);
307 put_bits(&s->pb, 1, s->drop_frame_timecode); /* drop frame flag */
308 /* time code : we must convert from the real frame rate to a
309 fake mpeg frame rate in case of low frame rate */
310 fps = (framerate.num + framerate.den/2)/ framerate.den;
311 time_code = s->current_picture_ptr->f.coded_picture_number + s->avctx->timecode_frame_start;
313 s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
314 av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
315 if (s->drop_frame_timecode)
316 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
317 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
318 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
319 put_bits(&s->pb, 1, 1);
320 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
321 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
322 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
323 put_bits(&s->pb, 1, 0); /* broken link */
327 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
329 put_bits(&s->pb, 11, 0x008);
332 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
333 ff_mpeg12_mbAddrIncrTable[run][0]);
336 static av_always_inline void put_qscale(MpegEncContext *s)
339 av_assert2(s->qscale>=1 && s->qscale <=12);
340 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
342 put_bits(&s->pb, 5, s->qscale);
346 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
347 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
348 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
349 put_bits(&s->pb, 3, s->mb_y >> 7); /* slice_vertical_position_extension */
351 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
354 put_bits(&s->pb, 1, 0); /* slice extra information */
357 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
359 mpeg1_encode_sequence_header(s);
361 /* mpeg1 picture header */
362 put_header(s, PICTURE_START_CODE);
363 /* temporal reference */
365 // RAL: s->picture_number instead of s->fake_picture_number
366 put_bits(&s->pb, 10, (s->picture_number -
367 s->gop_picture_number) & 0x3ff);
368 put_bits(&s->pb, 3, s->pict_type);
370 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
371 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
373 // RAL: Forward f_code also needed for B frames
374 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
375 put_bits(&s->pb, 1, 0); /* half pel coordinates */
376 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
377 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
379 put_bits(&s->pb, 3, 7); /* forward_f_code */
382 // RAL: Backward f_code necessary for B frames
383 if (s->pict_type == AV_PICTURE_TYPE_B) {
384 put_bits(&s->pb, 1, 0); /* half pel coordinates */
385 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
386 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
388 put_bits(&s->pb, 3, 7); /* backward_f_code */
391 put_bits(&s->pb, 1, 0); /* extra bit picture */
393 s->frame_pred_frame_dct = 1;
394 if(s->codec_id == AV_CODEC_ID_MPEG2VIDEO){
395 put_header(s, EXT_START_CODE);
396 put_bits(&s->pb, 4, 8); //pic ext
397 if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
398 put_bits(&s->pb, 4, s->f_code);
399 put_bits(&s->pb, 4, s->f_code);
401 put_bits(&s->pb, 8, 255);
403 if (s->pict_type == AV_PICTURE_TYPE_B) {
404 put_bits(&s->pb, 4, s->b_code);
405 put_bits(&s->pb, 4, s->b_code);
407 put_bits(&s->pb, 8, 255);
409 put_bits(&s->pb, 2, s->intra_dc_precision);
411 av_assert0(s->picture_structure == PICT_FRAME);
412 put_bits(&s->pb, 2, s->picture_structure);
413 if (s->progressive_sequence) {
414 put_bits(&s->pb, 1, 0); /* no repeat */
416 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
418 /* XXX: optimize the generation of this flag with entropy
420 s->frame_pred_frame_dct = s->progressive_sequence;
422 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
423 put_bits(&s->pb, 1, s->concealment_motion_vectors);
424 put_bits(&s->pb, 1, s->q_scale_type);
425 put_bits(&s->pb, 1, s->intra_vlc_format);
426 put_bits(&s->pb, 1, s->alternate_scan);
427 put_bits(&s->pb, 1, s->repeat_first_field);
428 s->progressive_frame = s->progressive_sequence;
429 put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
430 put_bits(&s->pb, 1, s->progressive_frame);
431 put_bits(&s->pb, 1, 0); //composite_display_flag
433 if (s->scan_offset) {
436 put_header(s, USER_START_CODE);
437 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
438 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
443 ff_mpeg1_encode_slice_header(s);
446 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
447 int has_mv, int field_motion)
449 put_bits(&s->pb, n, bits);
450 if (!s->frame_pred_frame_dct) {
452 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
453 put_bits(&s->pb, 1, s->interlaced_dct);
457 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
458 DCTELEM block[6][64],
459 int motion_x, int motion_y,
463 const int mb_x = s->mb_x;
464 const int mb_y = s->mb_y;
465 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
469 for(i=0;i<mb_block_count;i++) {
470 if (s->block_last_index[i] >= 0)
471 cbp |= 1 << (mb_block_count - 1 - i);
474 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
475 (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
476 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
477 (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) |
478 ((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))) {
480 s->qscale -= s->dquant;
484 if(s->pict_type == AV_PICTURE_TYPE_P){
485 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
486 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
490 av_assert0(s->mb_skip_run == 0);
491 encode_mb_skip_run(s, s->mb_x);
493 encode_mb_skip_run(s, s->mb_skip_run);
496 if (s->pict_type == AV_PICTURE_TYPE_I) {
497 if(s->dquant && cbp){
498 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
501 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
502 s->qscale -= s->dquant;
504 s->misc_bits+= get_bits_diff(s);
506 } else if (s->mb_intra) {
507 if(s->dquant && cbp){
508 put_mb_modes(s, 6, 0x01, 0, 0);
511 put_mb_modes(s, 5, 0x03, 0, 0);
512 s->qscale -= s->dquant;
514 s->misc_bits+= get_bits_diff(s);
516 memset(s->last_mv, 0, sizeof(s->last_mv));
517 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
518 if(s->mv_type == MV_TYPE_16X16){
520 if ((motion_x|motion_y) == 0) {
522 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
525 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
527 s->misc_bits+= get_bits_diff(s);
530 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
533 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
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->mv_bits+= get_bits_diff(s);
541 put_bits(&s->pb, 3, 1); /* motion only */
542 if (!s->frame_pred_frame_dct)
543 put_bits(&s->pb, 2, 2); /* motion_type: frame */
544 s->misc_bits+= get_bits_diff(s);
545 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
546 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
547 s->qscale -= s->dquant;
548 s->mv_bits+= get_bits_diff(s);
550 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
551 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
553 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
557 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
560 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
563 put_bits(&s->pb, 3, 1); /* motion only */
564 put_bits(&s->pb, 2, 1); /* motion_type: field */
565 s->qscale -= s->dquant;
567 s->misc_bits+= get_bits_diff(s);
569 put_bits(&s->pb, 1, s->field_select[0][i]);
570 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
571 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
572 s->last_mv[0][i][0]= s->mv[0][i][0];
573 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
575 s->mv_bits+= get_bits_diff(s);
578 if (s->chroma_y_shift) {
579 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
581 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
582 put_sbits(&s->pb, 2, cbp);
587 if(s->mv_type == MV_TYPE_16X16){
588 if (cbp){ // With coded bloc pattern
590 if(s->mv_dir == MV_DIR_FORWARD)
591 put_mb_modes(s, 6, 3, 1, 0);
593 put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);
596 put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);
598 }else{ // No coded bloc pattern
599 put_bits(&s->pb, 5-s->mv_dir, 2);
600 if (!s->frame_pred_frame_dct)
601 put_bits(&s->pb, 2, 2); /* motion_type: frame */
602 s->qscale -= s->dquant;
604 s->misc_bits += get_bits_diff(s);
605 if (s->mv_dir&MV_DIR_FORWARD){
606 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
607 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
608 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
609 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
612 if (s->mv_dir&MV_DIR_BACKWARD){
613 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
614 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
615 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
616 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
620 av_assert2(s->mv_type == MV_TYPE_FIELD);
621 av_assert2(!s->frame_pred_frame_dct);
622 if (cbp){ // With coded bloc pattern
624 if(s->mv_dir == MV_DIR_FORWARD)
625 put_mb_modes(s, 6, 3, 1, 1);
627 put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);
630 put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);
632 }else{ // No coded bloc pattern
633 put_bits(&s->pb, 5-s->mv_dir, 2);
634 put_bits(&s->pb, 2, 1); /* motion_type: field */
635 s->qscale -= s->dquant;
637 s->misc_bits += get_bits_diff(s);
638 if (s->mv_dir&MV_DIR_FORWARD){
640 put_bits(&s->pb, 1, s->field_select[0][i]);
641 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
642 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
643 s->last_mv[0][i][0]= s->mv[0][i][0];
644 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
648 if (s->mv_dir&MV_DIR_BACKWARD){
650 put_bits(&s->pb, 1, s->field_select[1][i]);
651 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
652 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
653 s->last_mv[1][i][0]= s->mv[1][i][0];
654 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
659 s->mv_bits += get_bits_diff(s);
661 if (s->chroma_y_shift) {
662 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
664 put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
665 put_sbits(&s->pb, 2, cbp);
669 for(i=0;i<mb_block_count;i++) {
670 if (cbp & (1 << (mb_block_count - 1 - i))) {
671 mpeg1_encode_block(s, block[i], i);
676 s->i_tex_bits+= get_bits_diff(s);
678 s->p_tex_bits+= get_bits_diff(s);
682 void ff_mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
684 if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
685 else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
688 // RAL: Parameter added: f_or_b_code
689 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
694 ff_mpeg12_mbMotionVectorTable[0][1],
695 ff_mpeg12_mbMotionVectorTable[0][0]);
697 int code, sign, bits;
698 int bit_size = f_or_b_code - 1;
699 int range = 1 << bit_size;
700 /* modulo encoding */
701 val = sign_extend(val, 5 + bit_size);
705 code = (val >> bit_size) + 1;
706 bits = val & (range - 1);
711 code = (val >> bit_size) + 1;
712 bits = val & (range - 1);
716 av_assert2(code > 0 && code <= 16);
719 ff_mpeg12_mbMotionVectorTable[code][1],
720 ff_mpeg12_mbMotionVectorTable[code][0]);
722 put_bits(&s->pb, 1, sign);
724 put_bits(&s->pb, bit_size, bits);
729 void ff_mpeg1_encode_init(MpegEncContext *s)
733 ff_mpeg12_common_init(s);
741 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
742 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
746 mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i];
747 mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i];
750 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
751 if(s->intra_vlc_format)
752 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
754 /* build unified dc encoding tables */
755 for(i=-255; i<256; i++)
763 index = av_log2(2*adiff);
765 bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;
766 code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
767 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
769 bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;
770 code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
771 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
774 for(f_code=1; f_code<=MAX_FCODE; f_code++){
775 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
778 if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];
780 int val, bit_size, code;
782 bit_size = f_code - 1;
788 code = (val >> bit_size) + 1;
790 len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;
792 len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;
796 mv_penalty[f_code][mv+MAX_MV]= len;
801 for(f_code=MAX_FCODE; f_code>0; f_code--){
802 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
803 fcode_tab[mv+MAX_MV]= f_code;
807 s->me.mv_penalty= mv_penalty;
808 s->fcode_tab= fcode_tab;
809 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){
816 if (s->intra_vlc_format) {
817 s->intra_ac_vlc_length=
818 s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
820 s->intra_ac_vlc_length=
821 s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
823 s->inter_ac_vlc_length=
824 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
827 static inline void encode_dc(MpegEncContext *s, int diff, int component)
829 if(((unsigned) (diff+255)) >= 511){
833 index= av_log2_16bit(-2*diff);
836 index= av_log2_16bit(2*diff);
838 if (component == 0) {
841 ff_mpeg12_vlc_dc_lum_bits[index] + index,
842 (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
846 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
847 (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
850 if (component == 0) {
853 mpeg1_lum_dc_uni[diff+255]&0xFF,
854 mpeg1_lum_dc_uni[diff+255]>>8);
858 mpeg1_chr_dc_uni[diff+255]&0xFF,
859 mpeg1_chr_dc_uni[diff+255]>>8);
864 static void mpeg1_encode_block(MpegEncContext *s,
868 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
870 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
872 last_index = s->block_last_index[n];
876 component = (n <= 3 ? 0 : (n&1) + 1);
877 dc = block[0]; /* overflow is impossible */
878 diff = dc - s->last_dc[component];
879 encode_dc(s, diff, component);
880 s->last_dc[component] = dc;
882 if (s->intra_vlc_format)
883 table_vlc = ff_rl_mpeg2.table_vlc;
885 /* encode the first coefficient : needs to be done here because
886 it is handled slightly differently */
888 if (abs(level) == 1) {
889 code = ((uint32_t)level >> 31); /* the sign bit */
890 put_bits(&s->pb, 2, code | 0x02);
899 /* now quantify & encode AC coefs */
900 last_non_zero = i - 1;
902 for(;i<=last_index;i++) {
903 j = s->intra_scantable.permutated[i];
906 /* encode using VLC */
908 run = i - last_non_zero - 1;
911 MASK_ABS(sign, alevel);
914 if (alevel <= mpeg1_max_level[0][run]){
915 code= mpeg1_index_run[0][run] + alevel - 1;
916 /* store the vlc & sign at once */
917 put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
919 /* escape seems to be pretty rare <5% so I do not optimize it */
920 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
921 /* escape: only clip in this case */
922 put_bits(&s->pb, 6, run);
923 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){
925 put_sbits(&s->pb, 8, level);
928 put_bits(&s->pb, 16, 0x8001 + level + 255);
930 put_sbits(&s->pb, 16, level);
934 put_sbits(&s->pb, 12, level);
941 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
944 #define OFFSET(x) offsetof(MpegEncContext, x)
945 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
947 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
948 { "intra_vlc", "Use MPEG-2 intra VLC table.", OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },\
949 { "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE}, \
950 { "scan_offset", "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
952 static const AVOption mpeg1_options[] = {
958 static const AVOption mpeg2_options[] = {
960 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
961 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
966 #define mpeg12_class(x)\
967 static const AVClass mpeg## x ##_class = {\
968 .class_name = "mpeg" #x "video encoder",\
969 .item_name = av_default_item_name,\
970 .option = mpeg## x ##_options,\
971 .version = LIBAVUTIL_VERSION_INT,\
977 AVCodec ff_mpeg1video_encoder = {
978 .name = "mpeg1video",
979 .type = AVMEDIA_TYPE_VIDEO,
980 .id = AV_CODEC_ID_MPEG1VIDEO,
981 .priv_data_size = sizeof(MpegEncContext),
983 .encode2 = ff_MPV_encode_picture,
984 .close = ff_MPV_encode_end,
985 .supported_framerates = avpriv_frame_rate_tab+1,
986 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
988 .capabilities = CODEC_CAP_DELAY,
989 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
990 .priv_class = &mpeg1_class,
993 AVCodec ff_mpeg2video_encoder = {
994 .name = "mpeg2video",
995 .type = AVMEDIA_TYPE_VIDEO,
996 .id = AV_CODEC_ID_MPEG2VIDEO,
997 .priv_data_size = sizeof(MpegEncContext),
999 .encode2 = ff_MPV_encode_picture,
1000 .close = ff_MPV_encode_end,
1001 .supported_framerates = ff_mpeg2_frame_rate_tab,
1002 .pix_fmts = (const enum AVPixelFormat[]){
1003 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE
1005 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1006 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1007 .priv_class = &mpeg2_class,