3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of Libav.
8 * Libav is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * Libav is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 #include "libavutil/attributes.h"
31 #include "libavutil/log.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/stereo3d.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][1] + 6; /* rl->n */
96 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
101 static int find_frame_rate_index(MpegEncContext *s)
104 int64_t dmin = INT64_MAX;
107 for (i = 1; i < 14; i++) {
108 int64_t n0 = 1001LL / ff_mpeg12_frame_rate_tab[i].den *
109 ff_mpeg12_frame_rate_tab[i].num * s->avctx->time_base.num;
110 int64_t n1 = 1001LL * s->avctx->time_base.den;
112 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
119 s->frame_rate_index = i;
129 static av_cold int encode_init(AVCodecContext *avctx)
131 MpegEncContext *s = avctx->priv_data;
133 if (ff_MPV_encode_init(avctx) < 0)
136 if (find_frame_rate_index(s) < 0) {
137 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
138 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
139 avctx->time_base.den, avctx->time_base.num);
142 av_log(avctx, AV_LOG_INFO,
143 "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
144 avctx->time_base.den, avctx->time_base.num);
148 if (avctx->profile == FF_PROFILE_UNKNOWN) {
149 if (avctx->level != FF_LEVEL_UNKNOWN) {
150 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
154 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
157 if (avctx->level == FF_LEVEL_UNKNOWN) {
158 if (avctx->profile == 0) { /* 4:2:2 */
159 if (avctx->width <= 720 && avctx->height <= 608)
160 avctx->level = 5; /* Main */
162 avctx->level = 2; /* High */
164 if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
165 av_log(avctx, AV_LOG_ERROR,
166 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
169 if (avctx->width <= 720 && avctx->height <= 576)
170 avctx->level = 8; /* Main */
171 else if (avctx->width <= 1440)
172 avctx->level = 6; /* High 1440 */
174 avctx->level = 4; /* High */
178 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
179 av_log(avctx, AV_LOG_ERROR,
180 "Drop frame time code only allowed with 1001/30000 fps\n");
187 static void put_header(MpegEncContext *s, int header)
189 avpriv_align_put_bits(&s->pb);
190 put_bits(&s->pb, 16, header >> 16);
191 put_sbits(&s->pb, 16, header);
194 /* put sequence header if needed */
195 static void mpeg1_encode_sequence_header(MpegEncContext *s)
197 unsigned int vbv_buffer_size, fps, v;
198 int i, constraint_parameter_flag;
200 float best_aspect_error = 1E10;
201 float aspect_ratio = av_q2d(s->avctx->sample_aspect_ratio);
203 if (aspect_ratio == 0.0)
204 aspect_ratio = 1.0; // pixel aspect 1.1 (VGA)
206 if (s->current_picture.f.key_frame) {
207 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
209 /* mpeg1 header repeated every gop */
210 put_header(s, SEQ_START_CODE);
212 put_sbits(&s->pb, 12, s->width);
213 put_sbits(&s->pb, 12, s->height);
215 for (i = 1; i < 15; i++) {
216 float error = aspect_ratio;
217 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
218 error -= 1.0 / ff_mpeg1_aspect[i];
220 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
222 error = FFABS(error);
224 if (error < best_aspect_error) {
225 best_aspect_error = error;
226 s->aspect_ratio_info = i;
230 put_bits(&s->pb, 4, s->aspect_ratio_info);
231 put_bits(&s->pb, 4, s->frame_rate_index);
233 if (s->avctx->rc_max_rate) {
234 v = (s->avctx->rc_max_rate + 399) / 400;
235 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
241 if (s->avctx->rc_buffer_size)
242 vbv_buffer_size = s->avctx->rc_buffer_size;
244 /* VBV calculation: Scaled so that a VCD has the proper
245 * VBV size of 40 kilobytes */
246 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
247 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
249 put_sbits(&s->pb, 18, v);
250 put_bits(&s->pb, 1, 1); // marker
251 put_sbits(&s->pb, 10, vbv_buffer_size);
253 constraint_parameter_flag =
256 s->mb_width * s->mb_height <= 396 &&
257 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
258 framerate.num <= framerate.den * 30 &&
259 s->avctx->me_range &&
260 s->avctx->me_range < 128 &&
261 vbv_buffer_size <= 20 &&
262 v <= 1856000 / 400 &&
263 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
265 put_bits(&s->pb, 1, constraint_parameter_flag);
267 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
268 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
270 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
271 put_header(s, EXT_START_CODE);
272 put_bits(&s->pb, 4, 1); // seq ext
274 put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
276 put_bits(&s->pb, 3, s->avctx->profile); // profile
277 put_bits(&s->pb, 4, s->avctx->level); // level
279 put_bits(&s->pb, 1, s->progressive_sequence);
280 put_bits(&s->pb, 2, s->chroma_format);
281 put_bits(&s->pb, 2, s->width >> 12);
282 put_bits(&s->pb, 2, s->height >> 12);
283 put_bits(&s->pb, 12, v >> 18); // bitrate ext
284 put_bits(&s->pb, 1, 1); // marker
285 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
286 put_bits(&s->pb, 1, s->low_delay);
287 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
288 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
291 put_header(s, GOP_START_CODE);
292 put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
293 /* time code: we must convert from the real frame rate to a
294 * fake MPEG frame rate in case of low frame rate */
295 fps = (framerate.num + framerate.den / 2) / framerate.den;
296 time_code = s->current_picture_ptr->f.coded_picture_number +
297 s->avctx->timecode_frame_start;
299 s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
300 if (s->drop_frame_timecode) {
301 /* only works for NTSC 29.97 */
302 int d = time_code / 17982;
303 int m = time_code % 17982;
304 /* not needed since -2,-1 / 1798 in C returns 0 */
307 time_code += 18 * d + 2 * ((m - 2) / 1798);
309 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
310 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
311 put_bits(&s->pb, 1, 1);
312 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
313 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
314 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
315 put_bits(&s->pb, 1, 0); // broken link
319 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
322 put_bits(&s->pb, 11, 0x008);
325 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
326 ff_mpeg12_mbAddrIncrTable[run][0]);
329 static av_always_inline void put_qscale(MpegEncContext *s)
331 if (s->q_scale_type) {
332 assert(s->qscale >= 1 && s->qscale <= 12);
333 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
335 put_bits(&s->pb, 5, s->qscale);
339 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
341 if (s->height > 2800) {
342 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
343 /* slice_vertical_position_extension */
344 put_bits(&s->pb, 3, s->mb_y >> 7);
346 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
349 /* slice extra information */
350 put_bits(&s->pb, 1, 0);
353 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
355 AVFrameSideData *side_data;
356 mpeg1_encode_sequence_header(s);
358 /* mpeg1 picture header */
359 put_header(s, PICTURE_START_CODE);
360 /* temporal reference */
362 // RAL: s->picture_number instead of s->fake_picture_number
364 (s->picture_number - s->gop_picture_number) & 0x3ff);
365 put_bits(&s->pb, 3, s->pict_type);
367 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
368 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
370 // RAL: Forward f_code also needed for B-frames
371 if (s->pict_type == AV_PICTURE_TYPE_P ||
372 s->pict_type == AV_PICTURE_TYPE_B) {
373 put_bits(&s->pb, 1, 0); /* half pel coordinates */
374 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
375 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
377 put_bits(&s->pb, 3, 7); /* forward_f_code */
380 // RAL: Backward f_code necessary for B-frames
381 if (s->pict_type == AV_PICTURE_TYPE_B) {
382 put_bits(&s->pb, 1, 0); /* half pel coordinates */
383 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
384 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
386 put_bits(&s->pb, 3, 7); /* backward_f_code */
389 put_bits(&s->pb, 1, 0); /* extra bit picture */
391 s->frame_pred_frame_dct = 1;
392 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
393 put_header(s, EXT_START_CODE);
394 put_bits(&s->pb, 4, 8); /* pic ext */
395 if (s->pict_type == AV_PICTURE_TYPE_P ||
396 s->pict_type == AV_PICTURE_TYPE_B) {
397 put_bits(&s->pb, 4, s->f_code);
398 put_bits(&s->pb, 4, s->f_code);
400 put_bits(&s->pb, 8, 255);
402 if (s->pict_type == AV_PICTURE_TYPE_B) {
403 put_bits(&s->pb, 4, s->b_code);
404 put_bits(&s->pb, 4, s->b_code);
406 put_bits(&s->pb, 8, 255);
408 put_bits(&s->pb, 2, s->intra_dc_precision);
410 assert(s->picture_structure == PICT_FRAME);
411 put_bits(&s->pb, 2, s->picture_structure);
412 if (s->progressive_sequence)
413 put_bits(&s->pb, 1, 0); /* no repeat */
415 put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
416 /* XXX: optimize the generation of this flag with entropy measures */
417 s->frame_pred_frame_dct = s->progressive_sequence;
419 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
420 put_bits(&s->pb, 1, s->concealment_motion_vectors);
421 put_bits(&s->pb, 1, s->q_scale_type);
422 put_bits(&s->pb, 1, s->intra_vlc_format);
423 put_bits(&s->pb, 1, s->alternate_scan);
424 put_bits(&s->pb, 1, s->repeat_first_field);
425 s->progressive_frame = s->progressive_sequence;
426 /* chroma_420_type */
427 put_bits(&s->pb, 1, s->chroma_format ==
428 CHROMA_420 ? s->progressive_frame : 0);
429 put_bits(&s->pb, 1, s->progressive_frame);
430 put_bits(&s->pb, 1, 0); /* composite_display_flag */
432 if (s->scan_offset) {
435 put_header(s, USER_START_CODE);
436 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
437 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
439 side_data = av_frame_get_side_data(&s->current_picture_ptr->f,
440 AV_FRAME_DATA_STEREO3D);
442 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
445 switch (stereo->type) {
446 case AV_STEREO3D_SIDEBYSIDE:
449 case AV_STEREO3D_TOPBOTTOM:
455 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
464 put_header(s, USER_START_CODE);
465 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
466 put_bits(&s->pb, 8, 'P');
467 put_bits(&s->pb, 8, '3');
468 put_bits(&s->pb, 8, 'D');
469 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
471 put_bits(&s->pb, 1, 1); // reserved_bit
472 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
473 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
474 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
479 ff_mpeg1_encode_slice_header(s);
482 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
483 int has_mv, int field_motion)
485 put_bits(&s->pb, n, bits);
486 if (!s->frame_pred_frame_dct) {
488 /* motion_type: frame/field */
489 put_bits(&s->pb, 2, 2 - field_motion);
490 put_bits(&s->pb, 1, s->interlaced_dct);
494 // RAL: Parameter added: f_or_b_code
495 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
500 ff_mpeg12_mbMotionVectorTable[0][1],
501 ff_mpeg12_mbMotionVectorTable[0][0]);
503 int code, sign, bits;
504 int bit_size = f_or_b_code - 1;
505 int range = 1 << bit_size;
506 /* modulo encoding */
507 val = sign_extend(val, 5 + bit_size);
511 code = (val >> bit_size) + 1;
512 bits = val & (range - 1);
517 code = (val >> bit_size) + 1;
518 bits = val & (range - 1);
522 assert(code > 0 && code <= 16);
525 ff_mpeg12_mbMotionVectorTable[code][1],
526 ff_mpeg12_mbMotionVectorTable[code][0]);
528 put_bits(&s->pb, 1, sign);
530 put_bits(&s->pb, bit_size, bits);
534 static inline void encode_dc(MpegEncContext *s, int diff, int component)
536 if (((unsigned) (diff + 255)) >= 511) {
540 index = av_log2_16bit(-2 * diff);
543 index = av_log2_16bit(2 * diff);
547 ff_mpeg12_vlc_dc_lum_bits[index] + index,
548 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
549 (diff & ((1 << index) - 1)));
552 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
553 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
554 (diff & ((1 << index) - 1)));
558 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
559 mpeg1_lum_dc_uni[diff + 255] >> 8);
562 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
563 mpeg1_chr_dc_uni[diff + 255] >> 8);
567 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
569 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
571 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
573 last_index = s->block_last_index[n];
577 component = (n <= 3 ? 0 : (n & 1) + 1);
578 dc = block[0]; /* overflow is impossible */
579 diff = dc - s->last_dc[component];
580 encode_dc(s, diff, component);
581 s->last_dc[component] = dc;
583 if (s->intra_vlc_format)
584 table_vlc = ff_rl_mpeg2.table_vlc;
586 /* encode the first coefficient: needs to be done here because
587 * it is handled slightly differently */
589 if (abs(level) == 1) {
590 code = ((uint32_t)level >> 31); /* the sign bit */
591 put_bits(&s->pb, 2, code | 0x02);
600 /* now quantify & encode AC coefs */
601 last_non_zero = i - 1;
603 for (; i <= last_index; i++) {
604 j = s->intra_scantable.permutated[i];
608 /* encode using VLC */
610 run = i - last_non_zero - 1;
613 MASK_ABS(sign, alevel);
616 if (alevel <= mpeg1_max_level[0][run]) {
617 code = mpeg1_index_run[0][run] + alevel - 1;
618 /* store the VLC & sign at once */
619 put_bits(&s->pb, table_vlc[code][1] + 1,
620 (table_vlc[code][0] << 1) + sign);
622 /* escape seems to be pretty rare <5% so I do not optimize it */
623 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
624 /* escape: only clip in this case */
625 put_bits(&s->pb, 6, run);
626 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
628 put_sbits(&s->pb, 8, level);
631 put_bits(&s->pb, 16, 0x8001 + level + 255);
633 put_sbits(&s->pb, 16, level);
636 put_sbits(&s->pb, 12, level);
643 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
646 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
647 int16_t block[6][64],
648 int motion_x, int motion_y,
652 const int mb_x = s->mb_x;
653 const int mb_y = s->mb_y;
654 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
658 for (i = 0; i < mb_block_count; i++)
659 if (s->block_last_index[i] >= 0)
660 cbp |= 1 << (mb_block_count - 1 - i);
662 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
663 (mb_x != s->mb_width - 1 ||
664 (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
665 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
666 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
667 (((s->mv_dir & MV_DIR_FORWARD)
668 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
669 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
670 ((s->mv_dir & MV_DIR_BACKWARD)
671 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
672 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
674 s->qscale -= s->dquant;
678 if (s->pict_type == AV_PICTURE_TYPE_P) {
679 s->last_mv[0][0][0] =
680 s->last_mv[0][0][1] =
681 s->last_mv[0][1][0] =
682 s->last_mv[0][1][1] = 0;
686 assert(s->mb_skip_run == 0);
687 encode_mb_skip_run(s, s->mb_x);
689 encode_mb_skip_run(s, s->mb_skip_run);
692 if (s->pict_type == AV_PICTURE_TYPE_I) {
693 if (s->dquant && cbp) {
694 /* macroblock_type: macroblock_quant = 1 */
695 put_mb_modes(s, 2, 1, 0, 0);
698 /* macroblock_type: macroblock_quant = 0 */
699 put_mb_modes(s, 1, 1, 0, 0);
700 s->qscale -= s->dquant;
702 s->misc_bits += get_bits_diff(s);
704 } else if (s->mb_intra) {
705 if (s->dquant && cbp) {
706 put_mb_modes(s, 6, 0x01, 0, 0);
709 put_mb_modes(s, 5, 0x03, 0, 0);
710 s->qscale -= s->dquant;
712 s->misc_bits += get_bits_diff(s);
714 memset(s->last_mv, 0, sizeof(s->last_mv));
715 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
716 if (s->mv_type == MV_TYPE_16X16) {
718 if ((motion_x | motion_y) == 0) {
720 /* macroblock_pattern & quant */
721 put_mb_modes(s, 5, 1, 0, 0);
724 /* macroblock_pattern only */
725 put_mb_modes(s, 2, 1, 0, 0);
727 s->misc_bits += get_bits_diff(s);
730 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
733 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
735 s->misc_bits += get_bits_diff(s);
736 // RAL: f_code parameter added
737 mpeg1_encode_motion(s,
738 motion_x - s->last_mv[0][0][0],
740 // RAL: f_code parameter added
741 mpeg1_encode_motion(s,
742 motion_y - s->last_mv[0][0][1],
744 s->mv_bits += get_bits_diff(s);
747 put_bits(&s->pb, 3, 1); /* motion only */
748 if (!s->frame_pred_frame_dct)
749 put_bits(&s->pb, 2, 2); /* motion_type: frame */
750 s->misc_bits += get_bits_diff(s);
751 // RAL: f_code parameter added
752 mpeg1_encode_motion(s,
753 motion_x - s->last_mv[0][0][0],
755 // RAL: f_code parameter added
756 mpeg1_encode_motion(s,
757 motion_y - s->last_mv[0][0][1],
759 s->qscale -= s->dquant;
760 s->mv_bits += get_bits_diff(s);
762 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
763 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
765 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
769 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
772 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
775 put_bits(&s->pb, 3, 1); /* motion only */
776 put_bits(&s->pb, 2, 1); /* motion_type: field */
777 s->qscale -= s->dquant;
779 s->misc_bits += get_bits_diff(s);
780 for (i = 0; i < 2; i++) {
781 put_bits(&s->pb, 1, s->field_select[0][i]);
782 mpeg1_encode_motion(s,
783 s->mv[0][i][0] - s->last_mv[0][i][0],
785 mpeg1_encode_motion(s,
786 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
788 s->last_mv[0][i][0] = s->mv[0][i][0];
789 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
791 s->mv_bits += get_bits_diff(s);
794 if (s->chroma_y_shift) {
796 ff_mpeg12_mbPatTable[cbp][1],
797 ff_mpeg12_mbPatTable[cbp][0]);
800 ff_mpeg12_mbPatTable[cbp >> 2][1],
801 ff_mpeg12_mbPatTable[cbp >> 2][0]);
802 put_sbits(&s->pb, 2, cbp);
807 if (s->mv_type == MV_TYPE_16X16) {
808 if (cbp) { // With coded bloc pattern
810 if (s->mv_dir == MV_DIR_FORWARD)
811 put_mb_modes(s, 6, 3, 1, 0);
813 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
816 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
818 } else { // No coded bloc pattern
819 put_bits(&s->pb, 5 - s->mv_dir, 2);
820 if (!s->frame_pred_frame_dct)
821 put_bits(&s->pb, 2, 2); /* motion_type: frame */
822 s->qscale -= s->dquant;
824 s->misc_bits += get_bits_diff(s);
825 if (s->mv_dir & MV_DIR_FORWARD) {
826 mpeg1_encode_motion(s,
827 s->mv[0][0][0] - s->last_mv[0][0][0],
829 mpeg1_encode_motion(s,
830 s->mv[0][0][1] - s->last_mv[0][0][1],
832 s->last_mv[0][0][0] =
833 s->last_mv[0][1][0] = s->mv[0][0][0];
834 s->last_mv[0][0][1] =
835 s->last_mv[0][1][1] = s->mv[0][0][1];
838 if (s->mv_dir & MV_DIR_BACKWARD) {
839 mpeg1_encode_motion(s,
840 s->mv[1][0][0] - s->last_mv[1][0][0],
842 mpeg1_encode_motion(s,
843 s->mv[1][0][1] - s->last_mv[1][0][1],
845 s->last_mv[1][0][0] =
846 s->last_mv[1][1][0] = s->mv[1][0][0];
847 s->last_mv[1][0][1] =
848 s->last_mv[1][1][1] = s->mv[1][0][1];
852 assert(s->mv_type == MV_TYPE_FIELD);
853 assert(!s->frame_pred_frame_dct);
854 if (cbp) { // With coded bloc pattern
856 if (s->mv_dir == MV_DIR_FORWARD)
857 put_mb_modes(s, 6, 3, 1, 1);
859 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
862 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
864 } else { // No coded bloc pattern
865 put_bits(&s->pb, 5 - s->mv_dir, 2);
866 put_bits(&s->pb, 2, 1); /* motion_type: field */
867 s->qscale -= s->dquant;
869 s->misc_bits += get_bits_diff(s);
870 if (s->mv_dir & MV_DIR_FORWARD) {
871 for (i = 0; i < 2; i++) {
872 put_bits(&s->pb, 1, s->field_select[0][i]);
873 mpeg1_encode_motion(s,
874 s->mv[0][i][0] - s->last_mv[0][i][0],
876 mpeg1_encode_motion(s,
877 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
879 s->last_mv[0][i][0] = s->mv[0][i][0];
880 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
884 if (s->mv_dir & MV_DIR_BACKWARD) {
885 for (i = 0; i < 2; i++) {
886 put_bits(&s->pb, 1, s->field_select[1][i]);
887 mpeg1_encode_motion(s,
888 s->mv[1][i][0] - s->last_mv[1][i][0],
890 mpeg1_encode_motion(s,
891 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
893 s->last_mv[1][i][0] = s->mv[1][i][0];
894 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
899 s->mv_bits += get_bits_diff(s);
901 if (s->chroma_y_shift) {
903 ff_mpeg12_mbPatTable[cbp][1],
904 ff_mpeg12_mbPatTable[cbp][0]);
907 ff_mpeg12_mbPatTable[cbp >> 2][1],
908 ff_mpeg12_mbPatTable[cbp >> 2][0]);
909 put_sbits(&s->pb, 2, cbp);
913 for (i = 0; i < mb_block_count; i++)
914 if (cbp & (1 << (mb_block_count - 1 - i)))
915 mpeg1_encode_block(s, block[i], i);
918 s->i_tex_bits += get_bits_diff(s);
920 s->p_tex_bits += get_bits_diff(s);
924 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
925 int motion_x, int motion_y)
927 if (s->chroma_format == CHROMA_420)
928 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
930 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
933 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
937 ff_mpeg12_common_init(s);
945 ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
946 ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
948 for (i = 0; i < 64; i++) {
949 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
950 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
953 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
954 if (s->intra_vlc_format)
955 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
957 /* build unified dc encoding tables */
958 for (i = -255; i < 256; i++) {
966 index = av_log2(2 * adiff);
968 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
969 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
970 (diff & ((1 << index) - 1));
971 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
973 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
974 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
975 (diff & ((1 << index) - 1));
976 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
979 for (f_code = 1; f_code <= MAX_FCODE; f_code++)
980 for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
984 len = ff_mpeg12_mbMotionVectorTable[0][1];
986 int val, bit_size, code;
988 bit_size = f_code - 1;
994 code = (val >> bit_size) + 1;
996 len = ff_mpeg12_mbMotionVectorTable[code][1] +
999 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1003 mv_penalty[f_code][mv + MAX_MV] = len;
1007 for (f_code = MAX_FCODE; f_code > 0; f_code--)
1008 for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1009 fcode_tab[mv + MAX_MV] = f_code;
1011 s->me.mv_penalty = mv_penalty;
1012 s->fcode_tab = fcode_tab;
1013 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1014 s->min_qcoeff = -255;
1015 s->max_qcoeff = 255;
1017 s->min_qcoeff = -2047;
1018 s->max_qcoeff = 2047;
1020 if (s->intra_vlc_format) {
1021 s->intra_ac_vlc_length =
1022 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1024 s->intra_ac_vlc_length =
1025 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1027 s->inter_ac_vlc_length =
1028 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1031 #define OFFSET(x) offsetof(MpegEncContext, x)
1032 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1033 #define COMMON_OPTS \
1034 { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1035 OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1036 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1037 OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1038 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1039 OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1041 static const AVOption mpeg1_options[] = {
1047 static const AVOption mpeg2_options[] = {
1049 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1050 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1055 #define mpeg12_class(x) \
1056 static const AVClass mpeg ## x ## _class = { \
1057 .class_name = "mpeg" # x "video encoder", \
1058 .item_name = av_default_item_name, \
1059 .option = mpeg ## x ## _options, \
1060 .version = LIBAVUTIL_VERSION_INT, \
1066 AVCodec ff_mpeg1video_encoder = {
1067 .name = "mpeg1video",
1068 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1069 .type = AVMEDIA_TYPE_VIDEO,
1070 .id = AV_CODEC_ID_MPEG1VIDEO,
1071 .priv_data_size = sizeof(MpegEncContext),
1072 .init = encode_init,
1073 .encode2 = ff_MPV_encode_picture,
1074 .close = ff_MPV_encode_end,
1075 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1076 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1078 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1079 .priv_class = &mpeg1_class,
1082 AVCodec ff_mpeg2video_encoder = {
1083 .name = "mpeg2video",
1084 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1085 .type = AVMEDIA_TYPE_VIDEO,
1086 .id = AV_CODEC_ID_MPEG2VIDEO,
1087 .priv_data_size = sizeof(MpegEncContext),
1088 .init = encode_init,
1089 .encode2 = ff_MPV_encode_picture,
1090 .close = ff_MPV_encode_end,
1091 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1092 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1095 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1096 .priv_class = &mpeg2_class,