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
28 #include "libavutil/attributes.h"
29 #include "libavutil/avassert.h"
30 #include "libavutil/log.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/timecode.h"
34 #include "bytestream.h"
37 #include "mpeg12data.h"
38 #include "mpegvideo.h"
41 static const uint8_t inv_non_linear_qscale[] = {
42 0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
45 static const uint8_t svcd_scan_offset_placeholder[] = {
46 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
47 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
50 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
51 static uint8_t fcode_tab[MAX_MV * 2 + 1];
53 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
54 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
56 /* simple include everything table for dc, first byte is bits
57 * number next 3 are code */
58 static uint32_t mpeg1_lum_dc_uni[512];
59 static uint32_t mpeg1_chr_dc_uni[512];
61 static uint8_t mpeg1_index_run[2][64];
62 static int8_t mpeg1_max_level[2][64];
64 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
68 for (i = 0; i < 128; i++) {
73 for (run = 0; run < 64; run++) {
75 int alevel = FFABS(level);
77 if (alevel > rl->max_level[0][run])
78 code = 111; /* rl->n */
80 code = rl->index_run[0][run] + alevel - 1;
82 if (code < 111) { /* rl->n */
83 /* length of VLC and sign */
84 len = rl->table_vlc[code][1] + 1;
86 len = rl->table_vlc[111 /* rl->n */][1] + 6;
94 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
99 static int find_frame_rate_index(MpegEncContext *s)
102 AVRational bestq = (AVRational) {0, 0};
104 AVRational target = av_inv_q(s->avctx->time_base);
106 for (i = 1; i < 14; i++) {
107 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
111 for (ext.num=1; ext.num <= 4; ext.num++) {
112 for (ext.den=1; ext.den <= 32; ext.den++) {
113 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
115 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
117 if (av_gcd(ext.den, ext.num) != 1)
121 || av_nearer_q(target, bestq, q) < 0
122 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
124 s->frame_rate_index = i;
125 s->mpeg2_frame_rate_ext.num = ext.num;
126 s->mpeg2_frame_rate_ext.den = ext.den;
132 if (av_cmp_q(target, bestq))
138 static av_cold int encode_init(AVCodecContext *avctx)
140 MpegEncContext *s = avctx->priv_data;
142 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
143 avctx->thread_count = 1;
145 if (ff_MPV_encode_init(avctx) < 0)
148 if (find_frame_rate_index(s) < 0) {
149 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
150 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
151 avctx->time_base.den, avctx->time_base.num);
154 av_log(avctx, AV_LOG_INFO,
155 "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
156 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");
166 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
169 if (avctx->level == FF_LEVEL_UNKNOWN) {
170 if (avctx->profile == 0) { /* 4:2:2 */
171 if (avctx->width <= 720 && avctx->height <= 608)
172 avctx->level = 5; /* Main */
174 avctx->level = 2; /* High */
176 if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
177 av_log(avctx, AV_LOG_ERROR,
178 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
181 if (avctx->width <= 720 && avctx->height <= 576)
182 avctx->level = 8; /* Main */
183 else if (avctx->width <= 1440)
184 avctx->level = 6; /* High 1440 */
186 avctx->level = 4; /* High */
190 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
191 av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
192 return AVERROR(EINVAL);
195 if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
196 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
197 av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiplies of 4096\n"
198 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
199 return AVERROR(EINVAL);
203 s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
204 if (s->drop_frame_timecode)
205 s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
206 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
207 av_log(avctx, AV_LOG_ERROR,
208 "Drop frame time code only allowed with 1001/30000 fps\n");
213 AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
214 int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
217 s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
218 s->avctx->timecode_frame_start = s->tc.start;
220 s->avctx->timecode_frame_start = 0; // default is -1
225 static void put_header(MpegEncContext *s, int header)
227 avpriv_align_put_bits(&s->pb);
228 put_bits(&s->pb, 16, header >> 16);
229 put_sbits(&s->pb, 16, header);
232 /* put sequence header if needed */
233 static void mpeg1_encode_sequence_header(MpegEncContext *s)
235 unsigned int vbv_buffer_size, fps, v;
236 int i, constraint_parameter_flag;
238 float best_aspect_error = 1E10;
239 float aspect_ratio = av_q2d(s->avctx->sample_aspect_ratio);
241 if (aspect_ratio == 0.0)
242 aspect_ratio = 1.0; // pixel aspect 1.1 (VGA)
244 if (s->current_picture.f.key_frame) {
245 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
247 /* mpeg1 header repeated every gop */
248 put_header(s, SEQ_START_CODE);
250 put_sbits(&s->pb, 12, s->width & 0xFFF);
251 put_sbits(&s->pb, 12, s->height & 0xFFF);
253 for (i = 1; i < 15; i++) {
254 float error = aspect_ratio;
255 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
256 error -= 1.0 / ff_mpeg1_aspect[i];
258 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
260 error = FFABS(error);
262 if (error < best_aspect_error) {
263 best_aspect_error = error;
264 s->aspect_ratio_info = i;
268 put_bits(&s->pb, 4, s->aspect_ratio_info);
269 put_bits(&s->pb, 4, s->frame_rate_index);
271 if (s->avctx->rc_max_rate) {
272 v = (s->avctx->rc_max_rate + 399) / 400;
273 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
279 if (s->avctx->rc_buffer_size)
280 vbv_buffer_size = s->avctx->rc_buffer_size;
282 /* VBV calculation: Scaled so that a VCD has the proper
283 * VBV size of 40 kilobytes */
284 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
285 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
287 put_sbits(&s->pb, 18, v);
288 put_bits(&s->pb, 1, 1); // marker
289 put_sbits(&s->pb, 10, vbv_buffer_size);
291 constraint_parameter_flag =
294 s->mb_width * s->mb_height <= 396 &&
295 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
296 framerate.num <= framerate.den * 30 &&
297 s->avctx->me_range &&
298 s->avctx->me_range < 128 &&
299 vbv_buffer_size <= 20 &&
300 v <= 1856000 / 400 &&
301 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
303 put_bits(&s->pb, 1, constraint_parameter_flag);
305 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
306 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
308 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
309 put_header(s, EXT_START_CODE);
310 put_bits(&s->pb, 4, 1); // seq ext
312 put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
314 put_bits(&s->pb, 3, s->avctx->profile); // profile
315 put_bits(&s->pb, 4, s->avctx->level); // level
317 put_bits(&s->pb, 1, s->progressive_sequence);
318 put_bits(&s->pb, 2, s->chroma_format);
319 put_bits(&s->pb, 2, s->width >> 12);
320 put_bits(&s->pb, 2, s->height >> 12);
321 put_bits(&s->pb, 12, v >> 18); // bitrate ext
322 put_bits(&s->pb, 1, 1); // marker
323 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
324 put_bits(&s->pb, 1, s->low_delay);
325 put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
326 put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
329 put_header(s, GOP_START_CODE);
330 put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
331 /* time code: we must convert from the real frame rate to a
332 * fake MPEG frame rate in case of low frame rate */
333 fps = (framerate.num + framerate.den / 2) / framerate.den;
334 time_code = s->current_picture_ptr->f.coded_picture_number +
335 s->avctx->timecode_frame_start;
337 s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
339 av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
340 if (s->drop_frame_timecode)
341 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
343 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
344 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
345 put_bits(&s->pb, 1, 1);
346 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
347 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
348 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
349 put_bits(&s->pb, 1, 0); // broken link
353 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
356 put_bits(&s->pb, 11, 0x008);
359 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
360 ff_mpeg12_mbAddrIncrTable[run][0]);
363 static av_always_inline void put_qscale(MpegEncContext *s)
365 if (s->q_scale_type) {
366 av_assert2(s->qscale >= 1 && s->qscale <= 12);
367 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
369 put_bits(&s->pb, 5, s->qscale);
373 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
375 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
376 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
377 /* slice_vertical_position_extension */
378 put_bits(&s->pb, 3, s->mb_y >> 7);
380 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
383 /* slice extra information */
384 put_bits(&s->pb, 1, 0);
387 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
389 mpeg1_encode_sequence_header(s);
391 /* mpeg1 picture header */
392 put_header(s, PICTURE_START_CODE);
393 /* temporal reference */
395 // RAL: s->picture_number instead of s->fake_picture_number
397 (s->picture_number - s->gop_picture_number) & 0x3ff);
398 put_bits(&s->pb, 3, s->pict_type);
400 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
401 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
403 // RAL: Forward f_code also needed for B-frames
404 if (s->pict_type == AV_PICTURE_TYPE_P ||
405 s->pict_type == AV_PICTURE_TYPE_B) {
406 put_bits(&s->pb, 1, 0); /* half pel coordinates */
407 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
408 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
410 put_bits(&s->pb, 3, 7); /* forward_f_code */
413 // RAL: Backward f_code necessary for B-frames
414 if (s->pict_type == AV_PICTURE_TYPE_B) {
415 put_bits(&s->pb, 1, 0); /* half pel coordinates */
416 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
417 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
419 put_bits(&s->pb, 3, 7); /* backward_f_code */
422 put_bits(&s->pb, 1, 0); /* extra bit picture */
424 s->frame_pred_frame_dct = 1;
425 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
426 put_header(s, EXT_START_CODE);
427 put_bits(&s->pb, 4, 8); /* pic ext */
428 if (s->pict_type == AV_PICTURE_TYPE_P ||
429 s->pict_type == AV_PICTURE_TYPE_B) {
430 put_bits(&s->pb, 4, s->f_code);
431 put_bits(&s->pb, 4, s->f_code);
433 put_bits(&s->pb, 8, 255);
435 if (s->pict_type == AV_PICTURE_TYPE_B) {
436 put_bits(&s->pb, 4, s->b_code);
437 put_bits(&s->pb, 4, s->b_code);
439 put_bits(&s->pb, 8, 255);
441 put_bits(&s->pb, 2, s->intra_dc_precision);
443 av_assert0(s->picture_structure == PICT_FRAME);
444 put_bits(&s->pb, 2, s->picture_structure);
445 if (s->progressive_sequence)
446 put_bits(&s->pb, 1, 0); /* no repeat */
448 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
449 /* XXX: optimize the generation of this flag with entropy measures */
450 s->frame_pred_frame_dct = s->progressive_sequence;
452 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
453 put_bits(&s->pb, 1, s->concealment_motion_vectors);
454 put_bits(&s->pb, 1, s->q_scale_type);
455 put_bits(&s->pb, 1, s->intra_vlc_format);
456 put_bits(&s->pb, 1, s->alternate_scan);
457 put_bits(&s->pb, 1, s->repeat_first_field);
458 s->progressive_frame = s->progressive_sequence;
459 /* chroma_420_type */
460 put_bits(&s->pb, 1, s->chroma_format ==
461 CHROMA_420 ? s->progressive_frame : 0);
462 put_bits(&s->pb, 1, s->progressive_frame);
463 put_bits(&s->pb, 1, 0); /* composite_display_flag */
465 if (s->scan_offset) {
468 put_header(s, USER_START_CODE);
469 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
470 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
474 ff_mpeg1_encode_slice_header(s);
477 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
478 int has_mv, int field_motion)
480 put_bits(&s->pb, n, bits);
481 if (!s->frame_pred_frame_dct) {
483 /* motion_type: frame/field */
484 put_bits(&s->pb, 2, 2 - field_motion);
485 put_bits(&s->pb, 1, s->interlaced_dct);
489 // RAL: Parameter added: f_or_b_code
490 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
495 ff_mpeg12_mbMotionVectorTable[0][1],
496 ff_mpeg12_mbMotionVectorTable[0][0]);
498 int code, sign, bits;
499 int bit_size = f_or_b_code - 1;
500 int range = 1 << bit_size;
501 /* modulo encoding */
502 val = sign_extend(val, 5 + bit_size);
506 code = (val >> bit_size) + 1;
507 bits = val & (range - 1);
512 code = (val >> bit_size) + 1;
513 bits = val & (range - 1);
517 av_assert2(code > 0 && code <= 16);
520 ff_mpeg12_mbMotionVectorTable[code][1],
521 ff_mpeg12_mbMotionVectorTable[code][0]);
523 put_bits(&s->pb, 1, sign);
525 put_bits(&s->pb, bit_size, bits);
529 static inline void encode_dc(MpegEncContext *s, int diff, int component)
531 if (((unsigned) (diff + 255)) >= 511) {
535 index = av_log2_16bit(-2 * diff);
538 index = av_log2_16bit(2 * diff);
542 ff_mpeg12_vlc_dc_lum_bits[index] + index,
543 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
544 (diff & ((1 << index) - 1)));
547 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
548 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
549 (diff & ((1 << index) - 1)));
553 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
554 mpeg1_lum_dc_uni[diff + 255] >> 8);
557 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
558 mpeg1_chr_dc_uni[diff + 255] >> 8);
562 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
564 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
566 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
568 last_index = s->block_last_index[n];
572 component = (n <= 3 ? 0 : (n & 1) + 1);
573 dc = block[0]; /* overflow is impossible */
574 diff = dc - s->last_dc[component];
575 encode_dc(s, diff, component);
576 s->last_dc[component] = dc;
578 if (s->intra_vlc_format)
579 table_vlc = ff_rl_mpeg2.table_vlc;
581 /* encode the first coefficient: needs to be done here because
582 * it is handled slightly differently */
584 if (abs(level) == 1) {
585 code = ((uint32_t)level >> 31); /* the sign bit */
586 put_bits(&s->pb, 2, code | 0x02);
595 /* now quantify & encode AC coefs */
596 last_non_zero = i - 1;
598 for (; i <= last_index; i++) {
599 j = s->intra_scantable.permutated[i];
603 /* encode using VLC */
605 run = i - last_non_zero - 1;
608 MASK_ABS(sign, alevel);
611 if (alevel <= mpeg1_max_level[0][run]) {
612 code = mpeg1_index_run[0][run] + alevel - 1;
613 /* store the VLC & sign at once */
614 put_bits(&s->pb, table_vlc[code][1] + 1,
615 (table_vlc[code][0] << 1) + sign);
617 /* escape seems to be pretty rare <5% so I do not optimize it */
618 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
619 /* escape: only clip in this case */
620 put_bits(&s->pb, 6, run);
621 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
623 put_sbits(&s->pb, 8, level);
626 put_bits(&s->pb, 16, 0x8001 + level + 255);
628 put_sbits(&s->pb, 16, level);
631 put_sbits(&s->pb, 12, level);
638 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
641 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
642 int16_t block[6][64],
643 int motion_x, int motion_y,
647 const int mb_x = s->mb_x;
648 const int mb_y = s->mb_y;
649 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
653 for (i = 0; i < mb_block_count; i++)
654 if (s->block_last_index[i] >= 0)
655 cbp |= 1 << (mb_block_count - 1 - i);
657 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
658 (mb_x != s->mb_width - 1 ||
659 (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
660 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
661 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
662 (((s->mv_dir & MV_DIR_FORWARD)
663 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
664 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
665 ((s->mv_dir & MV_DIR_BACKWARD)
666 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
667 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
669 s->qscale -= s->dquant;
673 if (s->pict_type == AV_PICTURE_TYPE_P) {
674 s->last_mv[0][0][0] =
675 s->last_mv[0][0][1] =
676 s->last_mv[0][1][0] =
677 s->last_mv[0][1][1] = 0;
681 av_assert0(s->mb_skip_run == 0);
682 encode_mb_skip_run(s, s->mb_x);
684 encode_mb_skip_run(s, s->mb_skip_run);
687 if (s->pict_type == AV_PICTURE_TYPE_I) {
688 if (s->dquant && cbp) {
689 /* macroblock_type: macroblock_quant = 1 */
690 put_mb_modes(s, 2, 1, 0, 0);
693 /* macroblock_type: macroblock_quant = 0 */
694 put_mb_modes(s, 1, 1, 0, 0);
695 s->qscale -= s->dquant;
697 s->misc_bits += get_bits_diff(s);
699 } else if (s->mb_intra) {
700 if (s->dquant && cbp) {
701 put_mb_modes(s, 6, 0x01, 0, 0);
704 put_mb_modes(s, 5, 0x03, 0, 0);
705 s->qscale -= s->dquant;
707 s->misc_bits += get_bits_diff(s);
709 memset(s->last_mv, 0, sizeof(s->last_mv));
710 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
711 if (s->mv_type == MV_TYPE_16X16) {
713 if ((motion_x | motion_y) == 0) {
715 /* macroblock_pattern & quant */
716 put_mb_modes(s, 5, 1, 0, 0);
719 /* macroblock_pattern only */
720 put_mb_modes(s, 2, 1, 0, 0);
722 s->misc_bits += get_bits_diff(s);
725 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
728 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
730 s->misc_bits += get_bits_diff(s);
731 // RAL: f_code parameter added
732 mpeg1_encode_motion(s,
733 motion_x - s->last_mv[0][0][0],
735 // RAL: f_code parameter added
736 mpeg1_encode_motion(s,
737 motion_y - s->last_mv[0][0][1],
739 s->mv_bits += get_bits_diff(s);
742 put_bits(&s->pb, 3, 1); /* motion only */
743 if (!s->frame_pred_frame_dct)
744 put_bits(&s->pb, 2, 2); /* motion_type: frame */
745 s->misc_bits += get_bits_diff(s);
746 // RAL: f_code parameter added
747 mpeg1_encode_motion(s,
748 motion_x - s->last_mv[0][0][0],
750 // RAL: f_code parameter added
751 mpeg1_encode_motion(s,
752 motion_y - s->last_mv[0][0][1],
754 s->qscale -= s->dquant;
755 s->mv_bits += get_bits_diff(s);
757 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
758 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
760 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
764 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
767 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
770 put_bits(&s->pb, 3, 1); /* motion only */
771 put_bits(&s->pb, 2, 1); /* motion_type: field */
772 s->qscale -= s->dquant;
774 s->misc_bits += get_bits_diff(s);
775 for (i = 0; i < 2; i++) {
776 put_bits(&s->pb, 1, s->field_select[0][i]);
777 mpeg1_encode_motion(s,
778 s->mv[0][i][0] - s->last_mv[0][i][0],
780 mpeg1_encode_motion(s,
781 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
783 s->last_mv[0][i][0] = s->mv[0][i][0];
784 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
786 s->mv_bits += get_bits_diff(s);
789 if (s->chroma_y_shift) {
791 ff_mpeg12_mbPatTable[cbp][1],
792 ff_mpeg12_mbPatTable[cbp][0]);
795 ff_mpeg12_mbPatTable[cbp >> 2][1],
796 ff_mpeg12_mbPatTable[cbp >> 2][0]);
797 put_sbits(&s->pb, 2, cbp);
802 if (s->mv_type == MV_TYPE_16X16) {
803 if (cbp) { // With coded bloc pattern
805 if (s->mv_dir == MV_DIR_FORWARD)
806 put_mb_modes(s, 6, 3, 1, 0);
808 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
811 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
813 } else { // No coded bloc pattern
814 put_bits(&s->pb, 5 - s->mv_dir, 2);
815 if (!s->frame_pred_frame_dct)
816 put_bits(&s->pb, 2, 2); /* motion_type: frame */
817 s->qscale -= s->dquant;
819 s->misc_bits += get_bits_diff(s);
820 if (s->mv_dir & MV_DIR_FORWARD) {
821 mpeg1_encode_motion(s,
822 s->mv[0][0][0] - s->last_mv[0][0][0],
824 mpeg1_encode_motion(s,
825 s->mv[0][0][1] - s->last_mv[0][0][1],
827 s->last_mv[0][0][0] =
828 s->last_mv[0][1][0] = s->mv[0][0][0];
829 s->last_mv[0][0][1] =
830 s->last_mv[0][1][1] = s->mv[0][0][1];
833 if (s->mv_dir & MV_DIR_BACKWARD) {
834 mpeg1_encode_motion(s,
835 s->mv[1][0][0] - s->last_mv[1][0][0],
837 mpeg1_encode_motion(s,
838 s->mv[1][0][1] - s->last_mv[1][0][1],
840 s->last_mv[1][0][0] =
841 s->last_mv[1][1][0] = s->mv[1][0][0];
842 s->last_mv[1][0][1] =
843 s->last_mv[1][1][1] = s->mv[1][0][1];
847 av_assert2(s->mv_type == MV_TYPE_FIELD);
848 av_assert2(!s->frame_pred_frame_dct);
849 if (cbp) { // With coded bloc pattern
851 if (s->mv_dir == MV_DIR_FORWARD)
852 put_mb_modes(s, 6, 3, 1, 1);
854 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
857 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
859 } else { // No coded bloc pattern
860 put_bits(&s->pb, 5 - s->mv_dir, 2);
861 put_bits(&s->pb, 2, 1); /* motion_type: field */
862 s->qscale -= s->dquant;
864 s->misc_bits += get_bits_diff(s);
865 if (s->mv_dir & MV_DIR_FORWARD) {
866 for (i = 0; i < 2; i++) {
867 put_bits(&s->pb, 1, s->field_select[0][i]);
868 mpeg1_encode_motion(s,
869 s->mv[0][i][0] - s->last_mv[0][i][0],
871 mpeg1_encode_motion(s,
872 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
874 s->last_mv[0][i][0] = s->mv[0][i][0];
875 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
879 if (s->mv_dir & MV_DIR_BACKWARD) {
880 for (i = 0; i < 2; i++) {
881 put_bits(&s->pb, 1, s->field_select[1][i]);
882 mpeg1_encode_motion(s,
883 s->mv[1][i][0] - s->last_mv[1][i][0],
885 mpeg1_encode_motion(s,
886 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
888 s->last_mv[1][i][0] = s->mv[1][i][0];
889 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
894 s->mv_bits += get_bits_diff(s);
896 if (s->chroma_y_shift) {
898 ff_mpeg12_mbPatTable[cbp][1],
899 ff_mpeg12_mbPatTable[cbp][0]);
902 ff_mpeg12_mbPatTable[cbp >> 2][1],
903 ff_mpeg12_mbPatTable[cbp >> 2][0]);
904 put_sbits(&s->pb, 2, cbp);
908 for (i = 0; i < mb_block_count; i++)
909 if (cbp & (1 << (mb_block_count - 1 - i)))
910 mpeg1_encode_block(s, block[i], i);
913 s->i_tex_bits += get_bits_diff(s);
915 s->p_tex_bits += get_bits_diff(s);
919 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
920 int motion_x, int motion_y)
922 if (s->chroma_format == CHROMA_420)
923 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
925 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
928 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
932 ff_mpeg12_common_init(s);
940 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
941 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
943 for (i = 0; i < 64; i++) {
944 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
945 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
948 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
949 if (s->intra_vlc_format)
950 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
952 /* build unified dc encoding tables */
953 for (i = -255; i < 256; i++) {
961 index = av_log2(2 * adiff);
963 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
964 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
965 (diff & ((1 << index) - 1));
966 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
968 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
969 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
970 (diff & ((1 << index) - 1));
971 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
974 for (f_code = 1; f_code <= MAX_FCODE; f_code++)
975 for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
979 len = ff_mpeg12_mbMotionVectorTable[0][1];
981 int val, bit_size, code;
983 bit_size = f_code - 1;
989 code = (val >> bit_size) + 1;
991 len = ff_mpeg12_mbMotionVectorTable[code][1] +
994 len = ff_mpeg12_mbMotionVectorTable[16][1] +
998 mv_penalty[f_code][mv + MAX_MV] = len;
1002 for (f_code = MAX_FCODE; f_code > 0; f_code--)
1003 for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1004 fcode_tab[mv + MAX_MV] = f_code;
1006 s->me.mv_penalty = mv_penalty;
1007 s->fcode_tab = fcode_tab;
1008 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1009 s->min_qcoeff = -255;
1010 s->max_qcoeff = 255;
1012 s->min_qcoeff = -2047;
1013 s->max_qcoeff = 2047;
1015 if (s->intra_vlc_format) {
1016 s->intra_ac_vlc_length =
1017 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1019 s->intra_ac_vlc_length =
1020 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1022 s->inter_ac_vlc_length =
1023 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1026 #define OFFSET(x) offsetof(MpegEncContext, x)
1027 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1028 #define COMMON_OPTS \
1029 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
1030 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1031 { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1032 OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1033 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1034 OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1035 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1036 OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1038 static const AVOption mpeg1_options[] = {
1044 static const AVOption mpeg2_options[] = {
1046 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1047 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1052 #define mpeg12_class(x) \
1053 static const AVClass mpeg ## x ## _class = { \
1054 .class_name = "mpeg" # x "video encoder", \
1055 .item_name = av_default_item_name, \
1056 .option = mpeg ## x ## _options, \
1057 .version = LIBAVUTIL_VERSION_INT, \
1063 AVCodec ff_mpeg1video_encoder = {
1064 .name = "mpeg1video",
1065 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1066 .type = AVMEDIA_TYPE_VIDEO,
1067 .id = AV_CODEC_ID_MPEG1VIDEO,
1068 .priv_data_size = sizeof(MpegEncContext),
1069 .init = encode_init,
1070 .encode2 = ff_MPV_encode_picture,
1071 .close = ff_MPV_encode_end,
1072 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1073 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1075 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1076 .priv_class = &mpeg1_class,
1079 AVCodec ff_mpeg2video_encoder = {
1080 .name = "mpeg2video",
1081 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1082 .type = AVMEDIA_TYPE_VIDEO,
1083 .id = AV_CODEC_ID_MPEG2VIDEO,
1084 .priv_data_size = sizeof(MpegEncContext),
1085 .init = encode_init,
1086 .encode2 = ff_MPV_encode_picture,
1087 .close = ff_MPV_encode_end,
1088 .supported_framerates = ff_mpeg2_frame_rate_tab,
1089 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1092 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1093 .priv_class = &mpeg2_class,