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 "libavutil/attributes.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/log.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/timecode.h"
35 #include "libavutil/stereo3d.h"
38 #include "bytestream.h"
41 #include "mpeg12data.h"
42 #include "mpegutils.h"
43 #include "mpegvideo.h"
46 static const uint8_t inv_non_linear_qscale[] = {
47 0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
50 static const uint8_t svcd_scan_offset_placeholder[] = {
51 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
52 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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
62 * number next 3 are code */
63 static uint32_t mpeg1_lum_dc_uni[512];
64 static uint32_t mpeg1_chr_dc_uni[512];
66 static uint8_t mpeg1_index_run[2][64];
67 static int8_t mpeg1_max_level[2][64];
69 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
73 for (i = 0; i < 128; i++) {
78 for (run = 0; run < 64; run++) {
80 int alevel = FFABS(level);
82 if (alevel > rl->max_level[0][run])
83 code = 111; /* rl->n */
85 code = rl->index_run[0][run] + alevel - 1;
87 if (code < 111) { /* rl->n */
88 /* length of VLC and sign */
89 len = rl->table_vlc[code][1] + 1;
91 len = rl->table_vlc[111 /* rl->n */][1] + 6;
99 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
104 static int find_frame_rate_index(MpegEncContext *s)
107 AVRational bestq = (AVRational) {0, 0};
109 AVRational target = av_inv_q(s->avctx->time_base);
111 for (i = 1; i < 14; i++) {
112 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
116 for (ext.num=1; ext.num <= 4; ext.num++) {
117 for (ext.den=1; ext.den <= 32; ext.den++) {
118 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
120 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
122 if (av_gcd(ext.den, ext.num) != 1)
126 || av_nearer_q(target, bestq, q) < 0
127 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
129 s->frame_rate_index = i;
130 s->mpeg2_frame_rate_ext.num = ext.num;
131 s->mpeg2_frame_rate_ext.den = ext.den;
137 if (av_cmp_q(target, bestq))
143 static av_cold int encode_init(AVCodecContext *avctx)
145 MpegEncContext *s = avctx->priv_data;
147 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
148 avctx->thread_count = 1;
150 if (ff_MPV_encode_init(avctx) < 0)
153 if (find_frame_rate_index(s) < 0) {
154 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
155 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
156 avctx->time_base.den, avctx->time_base.num);
159 av_log(avctx, AV_LOG_INFO,
160 "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
161 avctx->time_base.den, avctx->time_base.num);
165 if (avctx->profile == FF_PROFILE_UNKNOWN) {
166 if (avctx->level != FF_LEVEL_UNKNOWN) {
167 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
171 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
174 if (avctx->level == FF_LEVEL_UNKNOWN) {
175 if (avctx->profile == 0) { /* 4:2:2 */
176 if (avctx->width <= 720 && avctx->height <= 608)
177 avctx->level = 5; /* Main */
179 avctx->level = 2; /* High */
181 if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
182 av_log(avctx, AV_LOG_ERROR,
183 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
186 if (avctx->width <= 720 && avctx->height <= 576)
187 avctx->level = 8; /* Main */
188 else if (avctx->width <= 1440)
189 avctx->level = 6; /* High 1440 */
191 avctx->level = 4; /* High */
195 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
196 av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
197 return AVERROR(EINVAL);
200 if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
201 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
202 av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiplies of 4096\n"
203 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
204 return AVERROR(EINVAL);
208 s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
209 if (s->drop_frame_timecode)
210 s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
211 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
212 av_log(avctx, AV_LOG_ERROR,
213 "Drop frame time code only allowed with 1001/30000 fps\n");
218 AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
219 int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
222 s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
223 s->avctx->timecode_frame_start = s->tc.start;
225 s->avctx->timecode_frame_start = 0; // default is -1
230 static void put_header(MpegEncContext *s, int header)
232 avpriv_align_put_bits(&s->pb);
233 put_bits(&s->pb, 16, header >> 16);
234 put_sbits(&s->pb, 16, header);
237 /* put sequence header if needed */
238 static void mpeg1_encode_sequence_header(MpegEncContext *s)
240 unsigned int vbv_buffer_size, fps, v;
241 int i, constraint_parameter_flag;
243 float best_aspect_error = 1E10;
244 float aspect_ratio = av_q2d(s->avctx->sample_aspect_ratio);
246 if (aspect_ratio == 0.0)
247 aspect_ratio = 1.0; // pixel aspect 1.1 (VGA)
249 if (s->current_picture.f.key_frame) {
250 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
252 /* mpeg1 header repeated every gop */
253 put_header(s, SEQ_START_CODE);
255 put_sbits(&s->pb, 12, s->width & 0xFFF);
256 put_sbits(&s->pb, 12, s->height & 0xFFF);
258 for (i = 1; i < 15; i++) {
259 float error = aspect_ratio;
260 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
261 error -= 1.0 / ff_mpeg1_aspect[i];
263 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
265 error = FFABS(error);
267 if (error < best_aspect_error) {
268 best_aspect_error = error;
269 s->aspect_ratio_info = i;
273 put_bits(&s->pb, 4, s->aspect_ratio_info);
274 put_bits(&s->pb, 4, s->frame_rate_index);
276 if (s->avctx->rc_max_rate) {
277 v = (s->avctx->rc_max_rate + 399) / 400;
278 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
284 if (s->avctx->rc_buffer_size)
285 vbv_buffer_size = s->avctx->rc_buffer_size;
287 /* VBV calculation: Scaled so that a VCD has the proper
288 * VBV size of 40 kilobytes */
289 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
290 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
292 put_sbits(&s->pb, 18, v);
293 put_bits(&s->pb, 1, 1); // marker
294 put_sbits(&s->pb, 10, vbv_buffer_size);
296 constraint_parameter_flag =
299 s->mb_width * s->mb_height <= 396 &&
300 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
301 framerate.num <= framerate.den * 30 &&
302 s->avctx->me_range &&
303 s->avctx->me_range < 128 &&
304 vbv_buffer_size <= 20 &&
305 v <= 1856000 / 400 &&
306 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
308 put_bits(&s->pb, 1, constraint_parameter_flag);
310 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
311 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
313 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
314 put_header(s, EXT_START_CODE);
315 put_bits(&s->pb, 4, 1); // seq ext
317 put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
319 put_bits(&s->pb, 3, s->avctx->profile); // profile
320 put_bits(&s->pb, 4, s->avctx->level); // level
322 put_bits(&s->pb, 1, s->progressive_sequence);
323 put_bits(&s->pb, 2, s->chroma_format);
324 put_bits(&s->pb, 2, s->width >> 12);
325 put_bits(&s->pb, 2, s->height >> 12);
326 put_bits(&s->pb, 12, v >> 18); // bitrate ext
327 put_bits(&s->pb, 1, 1); // marker
328 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
329 put_bits(&s->pb, 1, s->low_delay);
330 put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
331 put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
334 put_header(s, GOP_START_CODE);
335 put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
336 /* time code: we must convert from the real frame rate to a
337 * fake MPEG frame rate in case of low frame rate */
338 fps = (framerate.num + framerate.den / 2) / framerate.den;
339 time_code = s->current_picture_ptr->f.coded_picture_number +
340 s->avctx->timecode_frame_start;
342 s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
344 av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
345 if (s->drop_frame_timecode)
346 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
348 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
349 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
350 put_bits(&s->pb, 1, 1);
351 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
352 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
353 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
354 put_bits(&s->pb, 1, 0); // broken link
358 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
361 put_bits(&s->pb, 11, 0x008);
364 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
365 ff_mpeg12_mbAddrIncrTable[run][0]);
368 static av_always_inline void put_qscale(MpegEncContext *s)
370 if (s->q_scale_type) {
371 av_assert2(s->qscale >= 1 && s->qscale <= 12);
372 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
374 put_bits(&s->pb, 5, s->qscale);
378 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
380 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
381 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
382 /* slice_vertical_position_extension */
383 put_bits(&s->pb, 3, s->mb_y >> 7);
385 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
388 /* slice extra information */
389 put_bits(&s->pb, 1, 0);
392 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
394 AVFrameSideData *side_data;
395 mpeg1_encode_sequence_header(s);
397 /* mpeg1 picture header */
398 put_header(s, PICTURE_START_CODE);
399 /* temporal reference */
401 // RAL: s->picture_number instead of s->fake_picture_number
403 (s->picture_number - s->gop_picture_number) & 0x3ff);
404 put_bits(&s->pb, 3, s->pict_type);
406 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
407 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
409 // RAL: Forward f_code also needed for B-frames
410 if (s->pict_type == AV_PICTURE_TYPE_P ||
411 s->pict_type == AV_PICTURE_TYPE_B) {
412 put_bits(&s->pb, 1, 0); /* half pel coordinates */
413 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
414 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
416 put_bits(&s->pb, 3, 7); /* forward_f_code */
419 // RAL: Backward f_code necessary for B-frames
420 if (s->pict_type == AV_PICTURE_TYPE_B) {
421 put_bits(&s->pb, 1, 0); /* half pel coordinates */
422 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
423 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
425 put_bits(&s->pb, 3, 7); /* backward_f_code */
428 put_bits(&s->pb, 1, 0); /* extra bit picture */
430 s->frame_pred_frame_dct = 1;
431 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
432 put_header(s, EXT_START_CODE);
433 put_bits(&s->pb, 4, 8); /* pic ext */
434 if (s->pict_type == AV_PICTURE_TYPE_P ||
435 s->pict_type == AV_PICTURE_TYPE_B) {
436 put_bits(&s->pb, 4, s->f_code);
437 put_bits(&s->pb, 4, s->f_code);
439 put_bits(&s->pb, 8, 255);
441 if (s->pict_type == AV_PICTURE_TYPE_B) {
442 put_bits(&s->pb, 4, s->b_code);
443 put_bits(&s->pb, 4, s->b_code);
445 put_bits(&s->pb, 8, 255);
447 put_bits(&s->pb, 2, s->intra_dc_precision);
449 av_assert0(s->picture_structure == PICT_FRAME);
450 put_bits(&s->pb, 2, s->picture_structure);
451 if (s->progressive_sequence)
452 put_bits(&s->pb, 1, 0); /* no repeat */
454 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
455 /* XXX: optimize the generation of this flag with entropy measures */
456 s->frame_pred_frame_dct = s->progressive_sequence;
458 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
459 put_bits(&s->pb, 1, s->concealment_motion_vectors);
460 put_bits(&s->pb, 1, s->q_scale_type);
461 put_bits(&s->pb, 1, s->intra_vlc_format);
462 put_bits(&s->pb, 1, s->alternate_scan);
463 put_bits(&s->pb, 1, s->repeat_first_field);
464 s->progressive_frame = s->progressive_sequence;
465 /* chroma_420_type */
466 put_bits(&s->pb, 1, s->chroma_format ==
467 CHROMA_420 ? s->progressive_frame : 0);
468 put_bits(&s->pb, 1, s->progressive_frame);
469 put_bits(&s->pb, 1, 0); /* composite_display_flag */
471 if (s->scan_offset) {
474 put_header(s, USER_START_CODE);
475 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
476 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
478 side_data = av_frame_get_side_data(&s->current_picture_ptr->f,
479 AV_FRAME_DATA_STEREO3D);
481 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
484 switch (stereo->type) {
485 case AV_STEREO3D_SIDEBYSIDE:
488 case AV_STEREO3D_TOPBOTTOM:
494 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
503 put_header(s, USER_START_CODE);
504 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
505 put_bits(&s->pb, 8, 'P');
506 put_bits(&s->pb, 8, '3');
507 put_bits(&s->pb, 8, 'D');
508 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
510 put_bits(&s->pb, 1, 1); // reserved_bit
511 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
512 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
513 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
518 ff_mpeg1_encode_slice_header(s);
521 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
522 int has_mv, int field_motion)
524 put_bits(&s->pb, n, bits);
525 if (!s->frame_pred_frame_dct) {
527 /* motion_type: frame/field */
528 put_bits(&s->pb, 2, 2 - field_motion);
529 put_bits(&s->pb, 1, s->interlaced_dct);
533 // RAL: Parameter added: f_or_b_code
534 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
539 ff_mpeg12_mbMotionVectorTable[0][1],
540 ff_mpeg12_mbMotionVectorTable[0][0]);
542 int code, sign, bits;
543 int bit_size = f_or_b_code - 1;
544 int range = 1 << bit_size;
545 /* modulo encoding */
546 val = sign_extend(val, 5 + bit_size);
550 code = (val >> bit_size) + 1;
551 bits = val & (range - 1);
556 code = (val >> bit_size) + 1;
557 bits = val & (range - 1);
561 av_assert2(code > 0 && code <= 16);
564 ff_mpeg12_mbMotionVectorTable[code][1],
565 ff_mpeg12_mbMotionVectorTable[code][0]);
567 put_bits(&s->pb, 1, sign);
569 put_bits(&s->pb, bit_size, bits);
573 static inline void encode_dc(MpegEncContext *s, int diff, int component)
575 if (((unsigned) (diff + 255)) >= 511) {
579 index = av_log2_16bit(-2 * diff);
582 index = av_log2_16bit(2 * diff);
586 ff_mpeg12_vlc_dc_lum_bits[index] + index,
587 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
588 (diff & ((1 << index) - 1)));
591 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
592 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
593 (diff & ((1 << index) - 1)));
597 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
598 mpeg1_lum_dc_uni[diff + 255] >> 8);
601 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
602 mpeg1_chr_dc_uni[diff + 255] >> 8);
606 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
608 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
610 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
612 last_index = s->block_last_index[n];
616 component = (n <= 3 ? 0 : (n & 1) + 1);
617 dc = block[0]; /* overflow is impossible */
618 diff = dc - s->last_dc[component];
619 encode_dc(s, diff, component);
620 s->last_dc[component] = dc;
622 if (s->intra_vlc_format)
623 table_vlc = ff_rl_mpeg2.table_vlc;
625 /* encode the first coefficient: needs to be done here because
626 * it is handled slightly differently */
628 if (abs(level) == 1) {
629 code = ((uint32_t)level >> 31); /* the sign bit */
630 put_bits(&s->pb, 2, code | 0x02);
639 /* now quantify & encode AC coefs */
640 last_non_zero = i - 1;
642 for (; i <= last_index; i++) {
643 j = s->intra_scantable.permutated[i];
647 /* encode using VLC */
649 run = i - last_non_zero - 1;
652 MASK_ABS(sign, alevel);
655 if (alevel <= mpeg1_max_level[0][run]) {
656 code = mpeg1_index_run[0][run] + alevel - 1;
657 /* store the VLC & sign at once */
658 put_bits(&s->pb, table_vlc[code][1] + 1,
659 (table_vlc[code][0] << 1) + sign);
661 /* escape seems to be pretty rare <5% so I do not optimize it */
662 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
663 /* escape: only clip in this case */
664 put_bits(&s->pb, 6, run);
665 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
667 put_sbits(&s->pb, 8, level);
670 put_bits(&s->pb, 16, 0x8001 + level + 255);
672 put_sbits(&s->pb, 16, level);
675 put_sbits(&s->pb, 12, level);
682 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
685 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
686 int16_t block[6][64],
687 int motion_x, int motion_y,
691 const int mb_x = s->mb_x;
692 const int mb_y = s->mb_y;
693 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
697 for (i = 0; i < mb_block_count; i++)
698 if (s->block_last_index[i] >= 0)
699 cbp |= 1 << (mb_block_count - 1 - i);
701 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
702 (mb_x != s->mb_width - 1 ||
703 (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
704 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
705 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
706 (((s->mv_dir & MV_DIR_FORWARD)
707 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
708 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
709 ((s->mv_dir & MV_DIR_BACKWARD)
710 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
711 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
713 s->qscale -= s->dquant;
717 if (s->pict_type == AV_PICTURE_TYPE_P) {
718 s->last_mv[0][0][0] =
719 s->last_mv[0][0][1] =
720 s->last_mv[0][1][0] =
721 s->last_mv[0][1][1] = 0;
725 av_assert0(s->mb_skip_run == 0);
726 encode_mb_skip_run(s, s->mb_x);
728 encode_mb_skip_run(s, s->mb_skip_run);
731 if (s->pict_type == AV_PICTURE_TYPE_I) {
732 if (s->dquant && cbp) {
733 /* macroblock_type: macroblock_quant = 1 */
734 put_mb_modes(s, 2, 1, 0, 0);
737 /* macroblock_type: macroblock_quant = 0 */
738 put_mb_modes(s, 1, 1, 0, 0);
739 s->qscale -= s->dquant;
741 s->misc_bits += get_bits_diff(s);
743 } else if (s->mb_intra) {
744 if (s->dquant && cbp) {
745 put_mb_modes(s, 6, 0x01, 0, 0);
748 put_mb_modes(s, 5, 0x03, 0, 0);
749 s->qscale -= s->dquant;
751 s->misc_bits += get_bits_diff(s);
753 memset(s->last_mv, 0, sizeof(s->last_mv));
754 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
755 if (s->mv_type == MV_TYPE_16X16) {
757 if ((motion_x | motion_y) == 0) {
759 /* macroblock_pattern & quant */
760 put_mb_modes(s, 5, 1, 0, 0);
763 /* macroblock_pattern only */
764 put_mb_modes(s, 2, 1, 0, 0);
766 s->misc_bits += get_bits_diff(s);
769 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
772 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
774 s->misc_bits += get_bits_diff(s);
775 // RAL: f_code parameter added
776 mpeg1_encode_motion(s,
777 motion_x - s->last_mv[0][0][0],
779 // RAL: f_code parameter added
780 mpeg1_encode_motion(s,
781 motion_y - s->last_mv[0][0][1],
783 s->mv_bits += get_bits_diff(s);
786 put_bits(&s->pb, 3, 1); /* motion only */
787 if (!s->frame_pred_frame_dct)
788 put_bits(&s->pb, 2, 2); /* motion_type: frame */
789 s->misc_bits += get_bits_diff(s);
790 // RAL: f_code parameter added
791 mpeg1_encode_motion(s,
792 motion_x - s->last_mv[0][0][0],
794 // RAL: f_code parameter added
795 mpeg1_encode_motion(s,
796 motion_y - s->last_mv[0][0][1],
798 s->qscale -= s->dquant;
799 s->mv_bits += get_bits_diff(s);
801 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
802 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
804 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
808 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
811 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
814 put_bits(&s->pb, 3, 1); /* motion only */
815 put_bits(&s->pb, 2, 1); /* motion_type: field */
816 s->qscale -= s->dquant;
818 s->misc_bits += get_bits_diff(s);
819 for (i = 0; i < 2; i++) {
820 put_bits(&s->pb, 1, s->field_select[0][i]);
821 mpeg1_encode_motion(s,
822 s->mv[0][i][0] - s->last_mv[0][i][0],
824 mpeg1_encode_motion(s,
825 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
827 s->last_mv[0][i][0] = s->mv[0][i][0];
828 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
830 s->mv_bits += get_bits_diff(s);
833 if (s->chroma_y_shift) {
835 ff_mpeg12_mbPatTable[cbp][1],
836 ff_mpeg12_mbPatTable[cbp][0]);
839 ff_mpeg12_mbPatTable[cbp >> 2][1],
840 ff_mpeg12_mbPatTable[cbp >> 2][0]);
841 put_sbits(&s->pb, 2, cbp);
846 if (s->mv_type == MV_TYPE_16X16) {
847 if (cbp) { // With coded bloc pattern
849 if (s->mv_dir == MV_DIR_FORWARD)
850 put_mb_modes(s, 6, 3, 1, 0);
852 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
855 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
857 } else { // No coded bloc pattern
858 put_bits(&s->pb, 5 - s->mv_dir, 2);
859 if (!s->frame_pred_frame_dct)
860 put_bits(&s->pb, 2, 2); /* motion_type: frame */
861 s->qscale -= s->dquant;
863 s->misc_bits += get_bits_diff(s);
864 if (s->mv_dir & MV_DIR_FORWARD) {
865 mpeg1_encode_motion(s,
866 s->mv[0][0][0] - s->last_mv[0][0][0],
868 mpeg1_encode_motion(s,
869 s->mv[0][0][1] - s->last_mv[0][0][1],
871 s->last_mv[0][0][0] =
872 s->last_mv[0][1][0] = s->mv[0][0][0];
873 s->last_mv[0][0][1] =
874 s->last_mv[0][1][1] = s->mv[0][0][1];
877 if (s->mv_dir & MV_DIR_BACKWARD) {
878 mpeg1_encode_motion(s,
879 s->mv[1][0][0] - s->last_mv[1][0][0],
881 mpeg1_encode_motion(s,
882 s->mv[1][0][1] - s->last_mv[1][0][1],
884 s->last_mv[1][0][0] =
885 s->last_mv[1][1][0] = s->mv[1][0][0];
886 s->last_mv[1][0][1] =
887 s->last_mv[1][1][1] = s->mv[1][0][1];
891 av_assert2(s->mv_type == MV_TYPE_FIELD);
892 av_assert2(!s->frame_pred_frame_dct);
893 if (cbp) { // With coded bloc pattern
895 if (s->mv_dir == MV_DIR_FORWARD)
896 put_mb_modes(s, 6, 3, 1, 1);
898 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
901 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
903 } else { // No coded bloc pattern
904 put_bits(&s->pb, 5 - s->mv_dir, 2);
905 put_bits(&s->pb, 2, 1); /* motion_type: field */
906 s->qscale -= s->dquant;
908 s->misc_bits += get_bits_diff(s);
909 if (s->mv_dir & MV_DIR_FORWARD) {
910 for (i = 0; i < 2; i++) {
911 put_bits(&s->pb, 1, s->field_select[0][i]);
912 mpeg1_encode_motion(s,
913 s->mv[0][i][0] - s->last_mv[0][i][0],
915 mpeg1_encode_motion(s,
916 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
918 s->last_mv[0][i][0] = s->mv[0][i][0];
919 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
923 if (s->mv_dir & MV_DIR_BACKWARD) {
924 for (i = 0; i < 2; i++) {
925 put_bits(&s->pb, 1, s->field_select[1][i]);
926 mpeg1_encode_motion(s,
927 s->mv[1][i][0] - s->last_mv[1][i][0],
929 mpeg1_encode_motion(s,
930 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
932 s->last_mv[1][i][0] = s->mv[1][i][0];
933 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
938 s->mv_bits += get_bits_diff(s);
940 if (s->chroma_y_shift) {
942 ff_mpeg12_mbPatTable[cbp][1],
943 ff_mpeg12_mbPatTable[cbp][0]);
946 ff_mpeg12_mbPatTable[cbp >> 2][1],
947 ff_mpeg12_mbPatTable[cbp >> 2][0]);
948 put_sbits(&s->pb, 2, cbp);
952 for (i = 0; i < mb_block_count; i++)
953 if (cbp & (1 << (mb_block_count - 1 - i)))
954 mpeg1_encode_block(s, block[i], i);
957 s->i_tex_bits += get_bits_diff(s);
959 s->p_tex_bits += get_bits_diff(s);
963 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
964 int motion_x, int motion_y)
966 if (s->chroma_format == CHROMA_420)
967 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
969 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
972 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
976 ff_mpeg12_common_init(s);
984 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
985 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
987 for (i = 0; i < 64; i++) {
988 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
989 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
992 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
993 if (s->intra_vlc_format)
994 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
996 /* build unified dc encoding tables */
997 for (i = -255; i < 256; i++) {
1002 adiff = FFABS(diff);
1005 index = av_log2(2 * adiff);
1007 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1008 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1009 (diff & ((1 << index) - 1));
1010 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1012 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1013 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1014 (diff & ((1 << index) - 1));
1015 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1018 for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1019 for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
1023 len = ff_mpeg12_mbMotionVectorTable[0][1];
1025 int val, bit_size, code;
1027 bit_size = f_code - 1;
1033 code = (val >> bit_size) + 1;
1035 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1038 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1042 mv_penalty[f_code][mv + MAX_MV] = len;
1046 for (f_code = MAX_FCODE; f_code > 0; f_code--)
1047 for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1048 fcode_tab[mv + MAX_MV] = f_code;
1050 s->me.mv_penalty = mv_penalty;
1051 s->fcode_tab = fcode_tab;
1052 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1053 s->min_qcoeff = -255;
1054 s->max_qcoeff = 255;
1056 s->min_qcoeff = -2047;
1057 s->max_qcoeff = 2047;
1059 if (s->intra_vlc_format) {
1060 s->intra_ac_vlc_length =
1061 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1063 s->intra_ac_vlc_length =
1064 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1066 s->inter_ac_vlc_length =
1067 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1070 #define OFFSET(x) offsetof(MpegEncContext, x)
1071 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1072 #define COMMON_OPTS \
1073 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
1074 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1075 { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1076 OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1077 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1078 OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1079 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1080 OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1082 static const AVOption mpeg1_options[] = {
1088 static const AVOption mpeg2_options[] = {
1090 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1091 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1096 #define mpeg12_class(x) \
1097 static const AVClass mpeg ## x ## _class = { \
1098 .class_name = "mpeg" # x "video encoder", \
1099 .item_name = av_default_item_name, \
1100 .option = mpeg ## x ## _options, \
1101 .version = LIBAVUTIL_VERSION_INT, \
1107 AVCodec ff_mpeg1video_encoder = {
1108 .name = "mpeg1video",
1109 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1110 .type = AVMEDIA_TYPE_VIDEO,
1111 .id = AV_CODEC_ID_MPEG1VIDEO,
1112 .priv_data_size = sizeof(MpegEncContext),
1113 .init = encode_init,
1114 .encode2 = ff_MPV_encode_picture,
1115 .close = ff_MPV_encode_end,
1116 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1117 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1119 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1120 .priv_class = &mpeg1_class,
1123 AVCodec ff_mpeg2video_encoder = {
1124 .name = "mpeg2video",
1125 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1126 .type = AVMEDIA_TYPE_VIDEO,
1127 .id = AV_CODEC_ID_MPEG2VIDEO,
1128 .priv_data_size = sizeof(MpegEncContext),
1129 .init = encode_init,
1130 .encode2 = ff_MPV_encode_picture,
1131 .close = ff_MPV_encode_end,
1132 .supported_framerates = ff_mpeg2_frame_rate_tab,
1133 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1136 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1137 .priv_class = &mpeg2_class,