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"
36 #include "bytestream.h"
39 #include "mpeg12data.h"
40 #include "mpegvideo.h"
43 static const uint8_t inv_non_linear_qscale[] = {
44 0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
47 static const uint8_t svcd_scan_offset_placeholder[] = {
48 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
49 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
52 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
53 static uint8_t fcode_tab[MAX_MV * 2 + 1];
55 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
56 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
58 /* simple include everything table for dc, first byte is bits
59 * number next 3 are code */
60 static uint32_t mpeg1_lum_dc_uni[512];
61 static uint32_t mpeg1_chr_dc_uni[512];
63 static uint8_t mpeg1_index_run[2][64];
64 static int8_t mpeg1_max_level[2][64];
66 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
70 for (i = 0; i < 128; i++) {
75 for (run = 0; run < 64; run++) {
77 int alevel = FFABS(level);
79 if (alevel > rl->max_level[0][run])
80 code = 111; /* rl->n */
82 code = rl->index_run[0][run] + alevel - 1;
84 if (code < 111) { /* rl->n */
85 /* length of VLC and sign */
86 len = rl->table_vlc[code][1] + 1;
88 len = rl->table_vlc[111 /* rl->n */][1] + 6;
96 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
101 static int find_frame_rate_index(MpegEncContext *s)
104 AVRational bestq = (AVRational) {0, 0};
106 AVRational target = av_inv_q(s->avctx->time_base);
108 for (i = 1; i < 14; i++) {
109 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
113 for (ext.num=1; ext.num <= 4; ext.num++) {
114 for (ext.den=1; ext.den <= 32; ext.den++) {
115 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
117 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
119 if (av_gcd(ext.den, ext.num) != 1)
123 || av_nearer_q(target, bestq, q) < 0
124 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
126 s->frame_rate_index = i;
127 s->mpeg2_frame_rate_ext.num = ext.num;
128 s->mpeg2_frame_rate_ext.den = ext.den;
134 if (av_cmp_q(target, bestq))
140 static av_cold int encode_init(AVCodecContext *avctx)
142 MpegEncContext *s = avctx->priv_data;
144 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
145 avctx->thread_count = 1;
147 if (ff_MPV_encode_init(avctx) < 0)
150 if (find_frame_rate_index(s) < 0) {
151 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
152 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
153 avctx->time_base.den, avctx->time_base.num);
156 av_log(avctx, AV_LOG_INFO,
157 "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
158 avctx->time_base.den, avctx->time_base.num);
162 if (avctx->profile == FF_PROFILE_UNKNOWN) {
163 if (avctx->level != FF_LEVEL_UNKNOWN) {
164 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
168 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
171 if (avctx->level == FF_LEVEL_UNKNOWN) {
172 if (avctx->profile == 0) { /* 4:2:2 */
173 if (avctx->width <= 720 && avctx->height <= 608)
174 avctx->level = 5; /* Main */
176 avctx->level = 2; /* High */
178 if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
179 av_log(avctx, AV_LOG_ERROR,
180 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
183 if (avctx->width <= 720 && avctx->height <= 576)
184 avctx->level = 8; /* Main */
185 else if (avctx->width <= 1440)
186 avctx->level = 6; /* High 1440 */
188 avctx->level = 4; /* High */
192 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
193 av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
194 return AVERROR(EINVAL);
197 if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
198 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
199 av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiplies of 4096\n"
200 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
201 return AVERROR(EINVAL);
205 s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
206 if (s->drop_frame_timecode)
207 s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
208 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
209 av_log(avctx, AV_LOG_ERROR,
210 "Drop frame time code only allowed with 1001/30000 fps\n");
215 AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
216 int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
219 s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
220 s->avctx->timecode_frame_start = s->tc.start;
222 s->avctx->timecode_frame_start = 0; // default is -1
227 static void put_header(MpegEncContext *s, int header)
229 avpriv_align_put_bits(&s->pb);
230 put_bits(&s->pb, 16, header >> 16);
231 put_sbits(&s->pb, 16, header);
234 /* put sequence header if needed */
235 static void mpeg1_encode_sequence_header(MpegEncContext *s)
237 unsigned int vbv_buffer_size, fps, v;
238 int i, constraint_parameter_flag;
240 float best_aspect_error = 1E10;
241 float aspect_ratio = av_q2d(s->avctx->sample_aspect_ratio);
243 if (aspect_ratio == 0.0)
244 aspect_ratio = 1.0; // pixel aspect 1.1 (VGA)
246 if (s->current_picture.f.key_frame) {
247 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
249 /* mpeg1 header repeated every gop */
250 put_header(s, SEQ_START_CODE);
252 put_sbits(&s->pb, 12, s->width & 0xFFF);
253 put_sbits(&s->pb, 12, s->height & 0xFFF);
255 for (i = 1; i < 15; i++) {
256 float error = aspect_ratio;
257 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
258 error -= 1.0 / ff_mpeg1_aspect[i];
260 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
262 error = FFABS(error);
264 if (error < best_aspect_error) {
265 best_aspect_error = error;
266 s->aspect_ratio_info = i;
270 put_bits(&s->pb, 4, s->aspect_ratio_info);
271 put_bits(&s->pb, 4, s->frame_rate_index);
273 if (s->avctx->rc_max_rate) {
274 v = (s->avctx->rc_max_rate + 399) / 400;
275 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
281 if (s->avctx->rc_buffer_size)
282 vbv_buffer_size = s->avctx->rc_buffer_size;
284 /* VBV calculation: Scaled so that a VCD has the proper
285 * VBV size of 40 kilobytes */
286 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
287 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
289 put_sbits(&s->pb, 18, v);
290 put_bits(&s->pb, 1, 1); // marker
291 put_sbits(&s->pb, 10, vbv_buffer_size);
293 constraint_parameter_flag =
296 s->mb_width * s->mb_height <= 396 &&
297 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
298 framerate.num <= framerate.den * 30 &&
299 s->avctx->me_range &&
300 s->avctx->me_range < 128 &&
301 vbv_buffer_size <= 20 &&
302 v <= 1856000 / 400 &&
303 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
305 put_bits(&s->pb, 1, constraint_parameter_flag);
307 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
308 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
310 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
311 put_header(s, EXT_START_CODE);
312 put_bits(&s->pb, 4, 1); // seq ext
314 put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
316 put_bits(&s->pb, 3, s->avctx->profile); // profile
317 put_bits(&s->pb, 4, s->avctx->level); // level
319 put_bits(&s->pb, 1, s->progressive_sequence);
320 put_bits(&s->pb, 2, s->chroma_format);
321 put_bits(&s->pb, 2, s->width >> 12);
322 put_bits(&s->pb, 2, s->height >> 12);
323 put_bits(&s->pb, 12, v >> 18); // bitrate ext
324 put_bits(&s->pb, 1, 1); // marker
325 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
326 put_bits(&s->pb, 1, s->low_delay);
327 put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
328 put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
331 put_header(s, GOP_START_CODE);
332 put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
333 /* time code: we must convert from the real frame rate to a
334 * fake MPEG frame rate in case of low frame rate */
335 fps = (framerate.num + framerate.den / 2) / framerate.den;
336 time_code = s->current_picture_ptr->f.coded_picture_number +
337 s->avctx->timecode_frame_start;
339 s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
341 av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
342 if (s->drop_frame_timecode)
343 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
345 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
346 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
347 put_bits(&s->pb, 1, 1);
348 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
349 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
350 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
351 put_bits(&s->pb, 1, 0); // broken link
355 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
358 put_bits(&s->pb, 11, 0x008);
361 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
362 ff_mpeg12_mbAddrIncrTable[run][0]);
365 static av_always_inline void put_qscale(MpegEncContext *s)
367 if (s->q_scale_type) {
368 av_assert2(s->qscale >= 1 && s->qscale <= 12);
369 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
371 put_bits(&s->pb, 5, s->qscale);
375 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
377 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
378 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
379 /* slice_vertical_position_extension */
380 put_bits(&s->pb, 3, s->mb_y >> 7);
382 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
385 /* slice extra information */
386 put_bits(&s->pb, 1, 0);
389 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
391 mpeg1_encode_sequence_header(s);
393 /* mpeg1 picture header */
394 put_header(s, PICTURE_START_CODE);
395 /* temporal reference */
397 // RAL: s->picture_number instead of s->fake_picture_number
399 (s->picture_number - s->gop_picture_number) & 0x3ff);
400 put_bits(&s->pb, 3, s->pict_type);
402 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
403 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
405 // RAL: Forward f_code also needed for B-frames
406 if (s->pict_type == AV_PICTURE_TYPE_P ||
407 s->pict_type == AV_PICTURE_TYPE_B) {
408 put_bits(&s->pb, 1, 0); /* half pel coordinates */
409 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
410 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
412 put_bits(&s->pb, 3, 7); /* forward_f_code */
415 // RAL: Backward f_code necessary for B-frames
416 if (s->pict_type == AV_PICTURE_TYPE_B) {
417 put_bits(&s->pb, 1, 0); /* half pel coordinates */
418 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
419 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
421 put_bits(&s->pb, 3, 7); /* backward_f_code */
424 put_bits(&s->pb, 1, 0); /* extra bit picture */
426 s->frame_pred_frame_dct = 1;
427 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
428 put_header(s, EXT_START_CODE);
429 put_bits(&s->pb, 4, 8); /* pic ext */
430 if (s->pict_type == AV_PICTURE_TYPE_P ||
431 s->pict_type == AV_PICTURE_TYPE_B) {
432 put_bits(&s->pb, 4, s->f_code);
433 put_bits(&s->pb, 4, s->f_code);
435 put_bits(&s->pb, 8, 255);
437 if (s->pict_type == AV_PICTURE_TYPE_B) {
438 put_bits(&s->pb, 4, s->b_code);
439 put_bits(&s->pb, 4, s->b_code);
441 put_bits(&s->pb, 8, 255);
443 put_bits(&s->pb, 2, s->intra_dc_precision);
445 av_assert0(s->picture_structure == PICT_FRAME);
446 put_bits(&s->pb, 2, s->picture_structure);
447 if (s->progressive_sequence)
448 put_bits(&s->pb, 1, 0); /* no repeat */
450 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
451 /* XXX: optimize the generation of this flag with entropy measures */
452 s->frame_pred_frame_dct = s->progressive_sequence;
454 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
455 put_bits(&s->pb, 1, s->concealment_motion_vectors);
456 put_bits(&s->pb, 1, s->q_scale_type);
457 put_bits(&s->pb, 1, s->intra_vlc_format);
458 put_bits(&s->pb, 1, s->alternate_scan);
459 put_bits(&s->pb, 1, s->repeat_first_field);
460 s->progressive_frame = s->progressive_sequence;
461 /* chroma_420_type */
462 put_bits(&s->pb, 1, s->chroma_format ==
463 CHROMA_420 ? s->progressive_frame : 0);
464 put_bits(&s->pb, 1, s->progressive_frame);
465 put_bits(&s->pb, 1, 0); /* composite_display_flag */
467 if (s->scan_offset) {
470 put_header(s, USER_START_CODE);
471 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
472 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
476 ff_mpeg1_encode_slice_header(s);
479 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
480 int has_mv, int field_motion)
482 put_bits(&s->pb, n, bits);
483 if (!s->frame_pred_frame_dct) {
485 /* motion_type: frame/field */
486 put_bits(&s->pb, 2, 2 - field_motion);
487 put_bits(&s->pb, 1, s->interlaced_dct);
491 // RAL: Parameter added: f_or_b_code
492 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
497 ff_mpeg12_mbMotionVectorTable[0][1],
498 ff_mpeg12_mbMotionVectorTable[0][0]);
500 int code, sign, bits;
501 int bit_size = f_or_b_code - 1;
502 int range = 1 << bit_size;
503 /* modulo encoding */
504 val = sign_extend(val, 5 + bit_size);
508 code = (val >> bit_size) + 1;
509 bits = val & (range - 1);
514 code = (val >> bit_size) + 1;
515 bits = val & (range - 1);
519 av_assert2(code > 0 && code <= 16);
522 ff_mpeg12_mbMotionVectorTable[code][1],
523 ff_mpeg12_mbMotionVectorTable[code][0]);
525 put_bits(&s->pb, 1, sign);
527 put_bits(&s->pb, bit_size, bits);
531 static inline void encode_dc(MpegEncContext *s, int diff, int component)
533 if (((unsigned) (diff + 255)) >= 511) {
537 index = av_log2_16bit(-2 * diff);
540 index = av_log2_16bit(2 * diff);
544 ff_mpeg12_vlc_dc_lum_bits[index] + index,
545 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
546 (diff & ((1 << index) - 1)));
549 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
550 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
551 (diff & ((1 << index) - 1)));
555 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
556 mpeg1_lum_dc_uni[diff + 255] >> 8);
559 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
560 mpeg1_chr_dc_uni[diff + 255] >> 8);
564 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
566 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
568 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
570 last_index = s->block_last_index[n];
574 component = (n <= 3 ? 0 : (n & 1) + 1);
575 dc = block[0]; /* overflow is impossible */
576 diff = dc - s->last_dc[component];
577 encode_dc(s, diff, component);
578 s->last_dc[component] = dc;
580 if (s->intra_vlc_format)
581 table_vlc = ff_rl_mpeg2.table_vlc;
583 /* encode the first coefficient: needs to be done here because
584 * it is handled slightly differently */
586 if (abs(level) == 1) {
587 code = ((uint32_t)level >> 31); /* the sign bit */
588 put_bits(&s->pb, 2, code | 0x02);
597 /* now quantify & encode AC coefs */
598 last_non_zero = i - 1;
600 for (; i <= last_index; i++) {
601 j = s->intra_scantable.permutated[i];
605 /* encode using VLC */
607 run = i - last_non_zero - 1;
610 MASK_ABS(sign, alevel);
613 if (alevel <= mpeg1_max_level[0][run]) {
614 code = mpeg1_index_run[0][run] + alevel - 1;
615 /* store the VLC & sign at once */
616 put_bits(&s->pb, table_vlc[code][1] + 1,
617 (table_vlc[code][0] << 1) + sign);
619 /* escape seems to be pretty rare <5% so I do not optimize it */
620 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
621 /* escape: only clip in this case */
622 put_bits(&s->pb, 6, run);
623 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
625 put_sbits(&s->pb, 8, level);
628 put_bits(&s->pb, 16, 0x8001 + level + 255);
630 put_sbits(&s->pb, 16, level);
633 put_sbits(&s->pb, 12, level);
640 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
643 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
644 int16_t block[6][64],
645 int motion_x, int motion_y,
649 const int mb_x = s->mb_x;
650 const int mb_y = s->mb_y;
651 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
655 for (i = 0; i < mb_block_count; i++)
656 if (s->block_last_index[i] >= 0)
657 cbp |= 1 << (mb_block_count - 1 - i);
659 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
660 (mb_x != s->mb_width - 1 ||
661 (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
662 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
663 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
664 (((s->mv_dir & MV_DIR_FORWARD)
665 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
666 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
667 ((s->mv_dir & MV_DIR_BACKWARD)
668 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
669 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
671 s->qscale -= s->dquant;
675 if (s->pict_type == AV_PICTURE_TYPE_P) {
676 s->last_mv[0][0][0] =
677 s->last_mv[0][0][1] =
678 s->last_mv[0][1][0] =
679 s->last_mv[0][1][1] = 0;
683 av_assert0(s->mb_skip_run == 0);
684 encode_mb_skip_run(s, s->mb_x);
686 encode_mb_skip_run(s, s->mb_skip_run);
689 if (s->pict_type == AV_PICTURE_TYPE_I) {
690 if (s->dquant && cbp) {
691 /* macroblock_type: macroblock_quant = 1 */
692 put_mb_modes(s, 2, 1, 0, 0);
695 /* macroblock_type: macroblock_quant = 0 */
696 put_mb_modes(s, 1, 1, 0, 0);
697 s->qscale -= s->dquant;
699 s->misc_bits += get_bits_diff(s);
701 } else if (s->mb_intra) {
702 if (s->dquant && cbp) {
703 put_mb_modes(s, 6, 0x01, 0, 0);
706 put_mb_modes(s, 5, 0x03, 0, 0);
707 s->qscale -= s->dquant;
709 s->misc_bits += get_bits_diff(s);
711 memset(s->last_mv, 0, sizeof(s->last_mv));
712 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
713 if (s->mv_type == MV_TYPE_16X16) {
715 if ((motion_x | motion_y) == 0) {
717 /* macroblock_pattern & quant */
718 put_mb_modes(s, 5, 1, 0, 0);
721 /* macroblock_pattern only */
722 put_mb_modes(s, 2, 1, 0, 0);
724 s->misc_bits += get_bits_diff(s);
727 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
730 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
732 s->misc_bits += get_bits_diff(s);
733 // RAL: f_code parameter added
734 mpeg1_encode_motion(s,
735 motion_x - s->last_mv[0][0][0],
737 // RAL: f_code parameter added
738 mpeg1_encode_motion(s,
739 motion_y - s->last_mv[0][0][1],
741 s->mv_bits += get_bits_diff(s);
744 put_bits(&s->pb, 3, 1); /* motion only */
745 if (!s->frame_pred_frame_dct)
746 put_bits(&s->pb, 2, 2); /* motion_type: frame */
747 s->misc_bits += get_bits_diff(s);
748 // RAL: f_code parameter added
749 mpeg1_encode_motion(s,
750 motion_x - s->last_mv[0][0][0],
752 // RAL: f_code parameter added
753 mpeg1_encode_motion(s,
754 motion_y - s->last_mv[0][0][1],
756 s->qscale -= s->dquant;
757 s->mv_bits += get_bits_diff(s);
759 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
760 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
762 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
766 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
769 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
772 put_bits(&s->pb, 3, 1); /* motion only */
773 put_bits(&s->pb, 2, 1); /* motion_type: field */
774 s->qscale -= s->dquant;
776 s->misc_bits += get_bits_diff(s);
777 for (i = 0; i < 2; i++) {
778 put_bits(&s->pb, 1, s->field_select[0][i]);
779 mpeg1_encode_motion(s,
780 s->mv[0][i][0] - s->last_mv[0][i][0],
782 mpeg1_encode_motion(s,
783 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
785 s->last_mv[0][i][0] = s->mv[0][i][0];
786 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
788 s->mv_bits += get_bits_diff(s);
791 if (s->chroma_y_shift) {
793 ff_mpeg12_mbPatTable[cbp][1],
794 ff_mpeg12_mbPatTable[cbp][0]);
797 ff_mpeg12_mbPatTable[cbp >> 2][1],
798 ff_mpeg12_mbPatTable[cbp >> 2][0]);
799 put_sbits(&s->pb, 2, cbp);
804 if (s->mv_type == MV_TYPE_16X16) {
805 if (cbp) { // With coded bloc pattern
807 if (s->mv_dir == MV_DIR_FORWARD)
808 put_mb_modes(s, 6, 3, 1, 0);
810 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
813 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
815 } else { // No coded bloc pattern
816 put_bits(&s->pb, 5 - s->mv_dir, 2);
817 if (!s->frame_pred_frame_dct)
818 put_bits(&s->pb, 2, 2); /* motion_type: frame */
819 s->qscale -= s->dquant;
821 s->misc_bits += get_bits_diff(s);
822 if (s->mv_dir & MV_DIR_FORWARD) {
823 mpeg1_encode_motion(s,
824 s->mv[0][0][0] - s->last_mv[0][0][0],
826 mpeg1_encode_motion(s,
827 s->mv[0][0][1] - s->last_mv[0][0][1],
829 s->last_mv[0][0][0] =
830 s->last_mv[0][1][0] = s->mv[0][0][0];
831 s->last_mv[0][0][1] =
832 s->last_mv[0][1][1] = s->mv[0][0][1];
835 if (s->mv_dir & MV_DIR_BACKWARD) {
836 mpeg1_encode_motion(s,
837 s->mv[1][0][0] - s->last_mv[1][0][0],
839 mpeg1_encode_motion(s,
840 s->mv[1][0][1] - s->last_mv[1][0][1],
842 s->last_mv[1][0][0] =
843 s->last_mv[1][1][0] = s->mv[1][0][0];
844 s->last_mv[1][0][1] =
845 s->last_mv[1][1][1] = s->mv[1][0][1];
849 av_assert2(s->mv_type == MV_TYPE_FIELD);
850 av_assert2(!s->frame_pred_frame_dct);
851 if (cbp) { // With coded bloc pattern
853 if (s->mv_dir == MV_DIR_FORWARD)
854 put_mb_modes(s, 6, 3, 1, 1);
856 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
859 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
861 } else { // No coded bloc pattern
862 put_bits(&s->pb, 5 - s->mv_dir, 2);
863 put_bits(&s->pb, 2, 1); /* motion_type: field */
864 s->qscale -= s->dquant;
866 s->misc_bits += get_bits_diff(s);
867 if (s->mv_dir & MV_DIR_FORWARD) {
868 for (i = 0; i < 2; i++) {
869 put_bits(&s->pb, 1, s->field_select[0][i]);
870 mpeg1_encode_motion(s,
871 s->mv[0][i][0] - s->last_mv[0][i][0],
873 mpeg1_encode_motion(s,
874 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
876 s->last_mv[0][i][0] = s->mv[0][i][0];
877 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
881 if (s->mv_dir & MV_DIR_BACKWARD) {
882 for (i = 0; i < 2; i++) {
883 put_bits(&s->pb, 1, s->field_select[1][i]);
884 mpeg1_encode_motion(s,
885 s->mv[1][i][0] - s->last_mv[1][i][0],
887 mpeg1_encode_motion(s,
888 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
890 s->last_mv[1][i][0] = s->mv[1][i][0];
891 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
896 s->mv_bits += get_bits_diff(s);
898 if (s->chroma_y_shift) {
900 ff_mpeg12_mbPatTable[cbp][1],
901 ff_mpeg12_mbPatTable[cbp][0]);
904 ff_mpeg12_mbPatTable[cbp >> 2][1],
905 ff_mpeg12_mbPatTable[cbp >> 2][0]);
906 put_sbits(&s->pb, 2, cbp);
910 for (i = 0; i < mb_block_count; i++)
911 if (cbp & (1 << (mb_block_count - 1 - i)))
912 mpeg1_encode_block(s, block[i], i);
915 s->i_tex_bits += get_bits_diff(s);
917 s->p_tex_bits += get_bits_diff(s);
921 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
922 int motion_x, int motion_y)
924 if (s->chroma_format == CHROMA_420)
925 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
927 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
930 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
934 ff_mpeg12_common_init(s);
942 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
943 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
945 for (i = 0; i < 64; i++) {
946 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
947 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
950 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
951 if (s->intra_vlc_format)
952 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
954 /* build unified dc encoding tables */
955 for (i = -255; i < 256; i++) {
963 index = av_log2(2 * adiff);
965 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
966 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
967 (diff & ((1 << index) - 1));
968 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
970 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
971 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
972 (diff & ((1 << index) - 1));
973 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
976 for (f_code = 1; f_code <= MAX_FCODE; f_code++)
977 for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
981 len = ff_mpeg12_mbMotionVectorTable[0][1];
983 int val, bit_size, code;
985 bit_size = f_code - 1;
991 code = (val >> bit_size) + 1;
993 len = ff_mpeg12_mbMotionVectorTable[code][1] +
996 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1000 mv_penalty[f_code][mv + MAX_MV] = len;
1004 for (f_code = MAX_FCODE; f_code > 0; f_code--)
1005 for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1006 fcode_tab[mv + MAX_MV] = f_code;
1008 s->me.mv_penalty = mv_penalty;
1009 s->fcode_tab = fcode_tab;
1010 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1011 s->min_qcoeff = -255;
1012 s->max_qcoeff = 255;
1014 s->min_qcoeff = -2047;
1015 s->max_qcoeff = 2047;
1017 if (s->intra_vlc_format) {
1018 s->intra_ac_vlc_length =
1019 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1021 s->intra_ac_vlc_length =
1022 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1024 s->inter_ac_vlc_length =
1025 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1028 #define OFFSET(x) offsetof(MpegEncContext, x)
1029 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1030 #define COMMON_OPTS \
1031 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
1032 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1033 { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1034 OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1035 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1036 OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1037 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1038 OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1040 static const AVOption mpeg1_options[] = {
1046 static const AVOption mpeg2_options[] = {
1048 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1049 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1054 #define mpeg12_class(x) \
1055 static const AVClass mpeg ## x ## _class = { \
1056 .class_name = "mpeg" # x "video encoder", \
1057 .item_name = av_default_item_name, \
1058 .option = mpeg ## x ## _options, \
1059 .version = LIBAVUTIL_VERSION_INT, \
1065 AVCodec ff_mpeg1video_encoder = {
1066 .name = "mpeg1video",
1067 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1068 .type = AVMEDIA_TYPE_VIDEO,
1069 .id = AV_CODEC_ID_MPEG1VIDEO,
1070 .priv_data_size = sizeof(MpegEncContext),
1071 .init = encode_init,
1072 .encode2 = ff_MPV_encode_picture,
1073 .close = ff_MPV_encode_end,
1074 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1075 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1077 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1078 .priv_class = &mpeg1_class,
1081 AVCodec ff_mpeg2video_encoder = {
1082 .name = "mpeg2video",
1083 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1084 .type = AVMEDIA_TYPE_VIDEO,
1085 .id = AV_CODEC_ID_MPEG2VIDEO,
1086 .priv_data_size = sizeof(MpegEncContext),
1087 .init = encode_init,
1088 .encode2 = ff_MPV_encode_picture,
1089 .close = ff_MPV_encode_end,
1090 .supported_framerates = ff_mpeg2_frame_rate_tab,
1091 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1094 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1095 .priv_class = &mpeg2_class,