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"
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_DMV * 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 (ff_mpv_encode_init(avctx) < 0)
145 if (find_frame_rate_index(s) < 0) {
146 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
147 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
148 avctx->time_base.den, avctx->time_base.num);
151 av_log(avctx, AV_LOG_INFO,
152 "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
153 avctx->time_base.den, avctx->time_base.num);
157 if (avctx->profile == FF_PROFILE_UNKNOWN) {
158 if (avctx->level != FF_LEVEL_UNKNOWN) {
159 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
163 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
166 if (avctx->level == FF_LEVEL_UNKNOWN) {
167 if (avctx->profile == 0) { /* 4:2:2 */
168 if (avctx->width <= 720 && avctx->height <= 608)
169 avctx->level = 5; /* Main */
171 avctx->level = 2; /* High */
173 if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
174 av_log(avctx, AV_LOG_ERROR,
175 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
178 if (avctx->width <= 720 && avctx->height <= 576)
179 avctx->level = 8; /* Main */
180 else if (avctx->width <= 1440)
181 avctx->level = 6; /* High 1440 */
183 avctx->level = 4; /* High */
187 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
188 av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
189 return AVERROR(EINVAL);
192 if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
193 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
194 av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
195 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
196 return AVERROR(EINVAL);
200 s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
201 if (s->drop_frame_timecode)
202 s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
203 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
204 av_log(avctx, AV_LOG_ERROR,
205 "Drop frame time code only allowed with 1001/30000 fps\n");
210 AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
211 int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
214 s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
215 s->avctx->timecode_frame_start = s->tc.start;
217 s->avctx->timecode_frame_start = 0; // default is -1
222 static void put_header(MpegEncContext *s, int header)
224 avpriv_align_put_bits(&s->pb);
225 put_bits(&s->pb, 16, header >> 16);
226 put_sbits(&s->pb, 16, header);
229 /* put sequence header if needed */
230 static void mpeg1_encode_sequence_header(MpegEncContext *s)
232 unsigned int vbv_buffer_size, fps, v;
233 int i, constraint_parameter_flag;
235 int64_t best_aspect_error = INT64_MAX;
236 AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
238 if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
239 aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
241 if (s->current_picture.f->key_frame) {
242 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
244 /* mpeg1 header repeated every gop */
245 put_header(s, SEQ_START_CODE);
247 put_sbits(&s->pb, 12, s->width & 0xFFF);
248 put_sbits(&s->pb, 12, s->height & 0xFFF);
250 for (i = 1; i < 15; i++) {
251 int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
252 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
253 error -= (1LL<<32) / ff_mpeg1_aspect[i];
255 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
257 error = FFABS(error);
259 if (error - 2 <= best_aspect_error) {
260 best_aspect_error = error;
261 s->aspect_ratio_info = i;
265 put_bits(&s->pb, 4, s->aspect_ratio_info);
266 put_bits(&s->pb, 4, s->frame_rate_index);
268 if (s->avctx->rc_max_rate) {
269 v = (s->avctx->rc_max_rate + 399) / 400;
270 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
276 if (s->avctx->rc_buffer_size)
277 vbv_buffer_size = s->avctx->rc_buffer_size;
279 /* VBV calculation: Scaled so that a VCD has the proper
280 * VBV size of 40 kilobytes */
281 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
282 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
284 put_sbits(&s->pb, 18, v);
285 put_bits(&s->pb, 1, 1); // marker
286 put_sbits(&s->pb, 10, vbv_buffer_size);
288 constraint_parameter_flag =
291 s->mb_width * s->mb_height <= 396 &&
292 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
293 framerate.num <= framerate.den * 30 &&
294 s->avctx->me_range &&
295 s->avctx->me_range < 128 &&
296 vbv_buffer_size <= 20 &&
297 v <= 1856000 / 400 &&
298 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
300 put_bits(&s->pb, 1, constraint_parameter_flag);
302 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
303 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
305 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
306 AVFrameSideData *side_data;
307 int width = s->width;
308 int height = s->height;
309 int use_seq_disp_ext;
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
330 side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
332 AVPanScan *pan_scan = (AVPanScan *)side_data->data;
333 if (pan_scan->width && pan_scan->height) {
334 width = pan_scan->width >> 4;
335 height = pan_scan->height >> 4;
339 use_seq_disp_ext = (width != s->width ||
340 height != s->height ||
341 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
342 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
343 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED);
345 if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
346 put_header(s, EXT_START_CODE);
347 put_bits(&s->pb, 4, 2); // sequence display extension
348 put_bits(&s->pb, 3, 0); // video_format: 0 is components
349 put_bits(&s->pb, 1, 1); // colour_description
350 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
351 put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
352 put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
353 put_bits(&s->pb, 14, width); // display_horizontal_size
354 put_bits(&s->pb, 1, 1); // marker_bit
355 put_bits(&s->pb, 14, height); // display_vertical_size
356 put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
360 put_header(s, GOP_START_CODE);
361 put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
362 /* time code: we must convert from the real frame rate to a
363 * fake MPEG frame rate in case of low frame rate */
364 fps = (framerate.num + framerate.den / 2) / framerate.den;
365 time_code = s->current_picture_ptr->f->coded_picture_number +
366 s->avctx->timecode_frame_start;
368 s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
370 av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
371 if (s->drop_frame_timecode)
372 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
374 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
375 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
376 put_bits(&s->pb, 1, 1);
377 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
378 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
379 put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
380 put_bits(&s->pb, 1, 0); // broken link
384 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
387 put_bits(&s->pb, 11, 0x008);
390 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
391 ff_mpeg12_mbAddrIncrTable[run][0]);
394 static av_always_inline void put_qscale(MpegEncContext *s)
396 put_bits(&s->pb, 5, s->qscale);
399 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
401 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
402 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
403 /* slice_vertical_position_extension */
404 put_bits(&s->pb, 3, s->mb_y >> 7);
406 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
409 /* slice extra information */
410 put_bits(&s->pb, 1, 0);
413 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
415 AVFrameSideData *side_data;
416 mpeg1_encode_sequence_header(s);
418 /* mpeg1 picture header */
419 put_header(s, PICTURE_START_CODE);
420 /* temporal reference */
422 // RAL: s->picture_number instead of s->fake_picture_number
424 (s->picture_number - s->gop_picture_number) & 0x3ff);
425 put_bits(&s->pb, 3, s->pict_type);
427 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
428 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
430 // RAL: Forward f_code also needed for B-frames
431 if (s->pict_type == AV_PICTURE_TYPE_P ||
432 s->pict_type == AV_PICTURE_TYPE_B) {
433 put_bits(&s->pb, 1, 0); /* half pel coordinates */
434 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
435 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
437 put_bits(&s->pb, 3, 7); /* forward_f_code */
440 // RAL: Backward f_code necessary for B-frames
441 if (s->pict_type == AV_PICTURE_TYPE_B) {
442 put_bits(&s->pb, 1, 0); /* half pel coordinates */
443 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
444 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
446 put_bits(&s->pb, 3, 7); /* backward_f_code */
449 put_bits(&s->pb, 1, 0); /* extra bit picture */
451 s->frame_pred_frame_dct = 1;
452 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
453 put_header(s, EXT_START_CODE);
454 put_bits(&s->pb, 4, 8); /* pic ext */
455 if (s->pict_type == AV_PICTURE_TYPE_P ||
456 s->pict_type == AV_PICTURE_TYPE_B) {
457 put_bits(&s->pb, 4, s->f_code);
458 put_bits(&s->pb, 4, s->f_code);
460 put_bits(&s->pb, 8, 255);
462 if (s->pict_type == AV_PICTURE_TYPE_B) {
463 put_bits(&s->pb, 4, s->b_code);
464 put_bits(&s->pb, 4, s->b_code);
466 put_bits(&s->pb, 8, 255);
468 put_bits(&s->pb, 2, s->intra_dc_precision);
470 av_assert0(s->picture_structure == PICT_FRAME);
471 put_bits(&s->pb, 2, s->picture_structure);
472 if (s->progressive_sequence)
473 put_bits(&s->pb, 1, 0); /* no repeat */
475 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
476 /* XXX: optimize the generation of this flag with entropy measures */
477 s->frame_pred_frame_dct = s->progressive_sequence;
479 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
480 put_bits(&s->pb, 1, s->concealment_motion_vectors);
481 put_bits(&s->pb, 1, s->q_scale_type);
482 put_bits(&s->pb, 1, s->intra_vlc_format);
483 put_bits(&s->pb, 1, s->alternate_scan);
484 put_bits(&s->pb, 1, s->repeat_first_field);
485 s->progressive_frame = s->progressive_sequence;
486 /* chroma_420_type */
487 put_bits(&s->pb, 1, s->chroma_format ==
488 CHROMA_420 ? s->progressive_frame : 0);
489 put_bits(&s->pb, 1, s->progressive_frame);
490 put_bits(&s->pb, 1, 0); /* composite_display_flag */
492 if (s->scan_offset) {
495 put_header(s, USER_START_CODE);
496 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
497 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
499 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
500 AV_FRAME_DATA_STEREO3D);
502 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
505 switch (stereo->type) {
506 case AV_STEREO3D_SIDEBYSIDE:
509 case AV_STEREO3D_TOPBOTTOM:
515 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
524 put_header(s, USER_START_CODE);
525 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
526 put_bits(&s->pb, 8, 'P');
527 put_bits(&s->pb, 8, '3');
528 put_bits(&s->pb, 8, 'D');
529 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
531 put_bits(&s->pb, 1, 1); // reserved_bit
532 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
533 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
534 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
539 ff_mpeg1_encode_slice_header(s);
542 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
543 int has_mv, int field_motion)
545 put_bits(&s->pb, n, bits);
546 if (!s->frame_pred_frame_dct) {
548 /* motion_type: frame/field */
549 put_bits(&s->pb, 2, 2 - field_motion);
550 put_bits(&s->pb, 1, s->interlaced_dct);
554 // RAL: Parameter added: f_or_b_code
555 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
560 ff_mpeg12_mbMotionVectorTable[0][1],
561 ff_mpeg12_mbMotionVectorTable[0][0]);
563 int code, sign, bits;
564 int bit_size = f_or_b_code - 1;
565 int range = 1 << bit_size;
566 /* modulo encoding */
567 val = sign_extend(val, 5 + bit_size);
571 code = (val >> bit_size) + 1;
572 bits = val & (range - 1);
577 code = (val >> bit_size) + 1;
578 bits = val & (range - 1);
582 av_assert2(code > 0 && code <= 16);
585 ff_mpeg12_mbMotionVectorTable[code][1],
586 ff_mpeg12_mbMotionVectorTable[code][0]);
588 put_bits(&s->pb, 1, sign);
590 put_bits(&s->pb, bit_size, bits);
594 static inline void encode_dc(MpegEncContext *s, int diff, int component)
596 unsigned int diff_u = diff + 255;
601 index = av_log2_16bit(-2 * diff);
604 index = av_log2_16bit(2 * diff);
608 ff_mpeg12_vlc_dc_lum_bits[index] + index,
609 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
610 av_mod_uintp2(diff, index));
613 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
614 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
615 av_mod_uintp2(diff, index));
619 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
620 mpeg1_lum_dc_uni[diff + 255] >> 8);
623 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
624 mpeg1_chr_dc_uni[diff + 255] >> 8);
628 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
630 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
632 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
634 last_index = s->block_last_index[n];
638 component = (n <= 3 ? 0 : (n & 1) + 1);
639 dc = block[0]; /* overflow is impossible */
640 diff = dc - s->last_dc[component];
641 encode_dc(s, diff, component);
642 s->last_dc[component] = dc;
644 if (s->intra_vlc_format)
645 table_vlc = ff_rl_mpeg2.table_vlc;
647 /* encode the first coefficient: needs to be done here because
648 * it is handled slightly differently */
650 if (abs(level) == 1) {
651 code = ((uint32_t)level >> 31); /* the sign bit */
652 put_bits(&s->pb, 2, code | 0x02);
661 /* now quantify & encode AC coefs */
662 last_non_zero = i - 1;
664 for (; i <= last_index; i++) {
665 j = s->intra_scantable.permutated[i];
669 /* encode using VLC */
671 run = i - last_non_zero - 1;
674 MASK_ABS(sign, alevel);
677 if (alevel <= mpeg1_max_level[0][run]) {
678 code = mpeg1_index_run[0][run] + alevel - 1;
679 /* store the VLC & sign at once */
680 put_bits(&s->pb, table_vlc[code][1] + 1,
681 (table_vlc[code][0] << 1) + sign);
683 /* escape seems to be pretty rare <5% so I do not optimize it */
684 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
685 /* escape: only clip in this case */
686 put_bits(&s->pb, 6, run);
687 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
689 put_sbits(&s->pb, 8, level);
692 put_bits(&s->pb, 16, 0x8001 + level + 255);
694 put_sbits(&s->pb, 16, level);
697 put_sbits(&s->pb, 12, level);
704 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
707 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
708 int16_t block[8][64],
709 int motion_x, int motion_y,
713 const int mb_x = s->mb_x;
714 const int mb_y = s->mb_y;
715 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
719 for (i = 0; i < mb_block_count; i++)
720 if (s->block_last_index[i] >= 0)
721 cbp |= 1 << (mb_block_count - 1 - i);
723 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
724 (mb_x != s->mb_width - 1 ||
725 (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
726 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
727 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
728 (((s->mv_dir & MV_DIR_FORWARD)
729 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
730 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
731 ((s->mv_dir & MV_DIR_BACKWARD)
732 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
733 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
735 s->qscale -= s->dquant;
739 if (s->pict_type == AV_PICTURE_TYPE_P) {
740 s->last_mv[0][0][0] =
741 s->last_mv[0][0][1] =
742 s->last_mv[0][1][0] =
743 s->last_mv[0][1][1] = 0;
747 av_assert0(s->mb_skip_run == 0);
748 encode_mb_skip_run(s, s->mb_x);
750 encode_mb_skip_run(s, s->mb_skip_run);
753 if (s->pict_type == AV_PICTURE_TYPE_I) {
754 if (s->dquant && cbp) {
755 /* macroblock_type: macroblock_quant = 1 */
756 put_mb_modes(s, 2, 1, 0, 0);
759 /* macroblock_type: macroblock_quant = 0 */
760 put_mb_modes(s, 1, 1, 0, 0);
761 s->qscale -= s->dquant;
763 s->misc_bits += get_bits_diff(s);
765 } else if (s->mb_intra) {
766 if (s->dquant && cbp) {
767 put_mb_modes(s, 6, 0x01, 0, 0);
770 put_mb_modes(s, 5, 0x03, 0, 0);
771 s->qscale -= s->dquant;
773 s->misc_bits += get_bits_diff(s);
775 memset(s->last_mv, 0, sizeof(s->last_mv));
776 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
777 if (s->mv_type == MV_TYPE_16X16) {
779 if ((motion_x | motion_y) == 0) {
781 /* macroblock_pattern & quant */
782 put_mb_modes(s, 5, 1, 0, 0);
785 /* macroblock_pattern only */
786 put_mb_modes(s, 2, 1, 0, 0);
788 s->misc_bits += get_bits_diff(s);
791 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
794 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
796 s->misc_bits += get_bits_diff(s);
797 // RAL: f_code parameter added
798 mpeg1_encode_motion(s,
799 motion_x - s->last_mv[0][0][0],
801 // RAL: f_code parameter added
802 mpeg1_encode_motion(s,
803 motion_y - s->last_mv[0][0][1],
805 s->mv_bits += get_bits_diff(s);
808 put_bits(&s->pb, 3, 1); /* motion only */
809 if (!s->frame_pred_frame_dct)
810 put_bits(&s->pb, 2, 2); /* motion_type: frame */
811 s->misc_bits += get_bits_diff(s);
812 // RAL: f_code parameter added
813 mpeg1_encode_motion(s,
814 motion_x - s->last_mv[0][0][0],
816 // RAL: f_code parameter added
817 mpeg1_encode_motion(s,
818 motion_y - s->last_mv[0][0][1],
820 s->qscale -= s->dquant;
821 s->mv_bits += get_bits_diff(s);
823 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
824 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
826 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
830 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
833 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
836 put_bits(&s->pb, 3, 1); /* motion only */
837 put_bits(&s->pb, 2, 1); /* motion_type: field */
838 s->qscale -= s->dquant;
840 s->misc_bits += get_bits_diff(s);
841 for (i = 0; i < 2; i++) {
842 put_bits(&s->pb, 1, s->field_select[0][i]);
843 mpeg1_encode_motion(s,
844 s->mv[0][i][0] - s->last_mv[0][i][0],
846 mpeg1_encode_motion(s,
847 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
849 s->last_mv[0][i][0] = s->mv[0][i][0];
850 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
852 s->mv_bits += get_bits_diff(s);
855 if (s->chroma_y_shift) {
857 ff_mpeg12_mbPatTable[cbp][1],
858 ff_mpeg12_mbPatTable[cbp][0]);
861 ff_mpeg12_mbPatTable[cbp >> 2][1],
862 ff_mpeg12_mbPatTable[cbp >> 2][0]);
863 put_sbits(&s->pb, 2, cbp);
868 if (s->mv_type == MV_TYPE_16X16) {
869 if (cbp) { // With coded bloc pattern
871 if (s->mv_dir == MV_DIR_FORWARD)
872 put_mb_modes(s, 6, 3, 1, 0);
874 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
877 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
879 } else { // No coded bloc pattern
880 put_bits(&s->pb, 5 - s->mv_dir, 2);
881 if (!s->frame_pred_frame_dct)
882 put_bits(&s->pb, 2, 2); /* motion_type: frame */
883 s->qscale -= s->dquant;
885 s->misc_bits += get_bits_diff(s);
886 if (s->mv_dir & MV_DIR_FORWARD) {
887 mpeg1_encode_motion(s,
888 s->mv[0][0][0] - s->last_mv[0][0][0],
890 mpeg1_encode_motion(s,
891 s->mv[0][0][1] - s->last_mv[0][0][1],
893 s->last_mv[0][0][0] =
894 s->last_mv[0][1][0] = s->mv[0][0][0];
895 s->last_mv[0][0][1] =
896 s->last_mv[0][1][1] = s->mv[0][0][1];
899 if (s->mv_dir & MV_DIR_BACKWARD) {
900 mpeg1_encode_motion(s,
901 s->mv[1][0][0] - s->last_mv[1][0][0],
903 mpeg1_encode_motion(s,
904 s->mv[1][0][1] - s->last_mv[1][0][1],
906 s->last_mv[1][0][0] =
907 s->last_mv[1][1][0] = s->mv[1][0][0];
908 s->last_mv[1][0][1] =
909 s->last_mv[1][1][1] = s->mv[1][0][1];
913 av_assert2(s->mv_type == MV_TYPE_FIELD);
914 av_assert2(!s->frame_pred_frame_dct);
915 if (cbp) { // With coded bloc pattern
917 if (s->mv_dir == MV_DIR_FORWARD)
918 put_mb_modes(s, 6, 3, 1, 1);
920 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
923 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
925 } else { // No coded bloc pattern
926 put_bits(&s->pb, 5 - s->mv_dir, 2);
927 put_bits(&s->pb, 2, 1); /* motion_type: field */
928 s->qscale -= s->dquant;
930 s->misc_bits += get_bits_diff(s);
931 if (s->mv_dir & MV_DIR_FORWARD) {
932 for (i = 0; i < 2; i++) {
933 put_bits(&s->pb, 1, s->field_select[0][i]);
934 mpeg1_encode_motion(s,
935 s->mv[0][i][0] - s->last_mv[0][i][0],
937 mpeg1_encode_motion(s,
938 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
940 s->last_mv[0][i][0] = s->mv[0][i][0];
941 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
945 if (s->mv_dir & MV_DIR_BACKWARD) {
946 for (i = 0; i < 2; i++) {
947 put_bits(&s->pb, 1, s->field_select[1][i]);
948 mpeg1_encode_motion(s,
949 s->mv[1][i][0] - s->last_mv[1][i][0],
951 mpeg1_encode_motion(s,
952 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
954 s->last_mv[1][i][0] = s->mv[1][i][0];
955 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
960 s->mv_bits += get_bits_diff(s);
962 if (s->chroma_y_shift) {
964 ff_mpeg12_mbPatTable[cbp][1],
965 ff_mpeg12_mbPatTable[cbp][0]);
968 ff_mpeg12_mbPatTable[cbp >> 2][1],
969 ff_mpeg12_mbPatTable[cbp >> 2][0]);
970 put_sbits(&s->pb, 2, cbp);
974 for (i = 0; i < mb_block_count; i++)
975 if (cbp & (1 << (mb_block_count - 1 - i)))
976 mpeg1_encode_block(s, block[i], i);
979 s->i_tex_bits += get_bits_diff(s);
981 s->p_tex_bits += get_bits_diff(s);
985 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
986 int motion_x, int motion_y)
988 if (s->chroma_format == CHROMA_420)
989 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
991 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
994 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
998 ff_mpeg12_common_init(s);
1006 ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
1007 ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
1009 for (i = 0; i < 64; i++) {
1010 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1011 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1014 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1015 if (s->intra_vlc_format)
1016 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1018 /* build unified dc encoding tables */
1019 for (i = -255; i < 256; i++) {
1024 adiff = FFABS(diff);
1027 index = av_log2(2 * adiff);
1029 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1030 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1031 av_mod_uintp2(diff, index);
1032 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1034 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1035 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1036 av_mod_uintp2(diff, index);
1037 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1040 for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1041 for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1045 len = ff_mpeg12_mbMotionVectorTable[0][1];
1047 int val, bit_size, code;
1049 bit_size = f_code - 1;
1055 code = (val >> bit_size) + 1;
1057 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1060 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1064 mv_penalty[f_code][mv + MAX_DMV] = len;
1068 for (f_code = MAX_FCODE; f_code > 0; f_code--)
1069 for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1070 fcode_tab[mv + MAX_MV] = f_code;
1072 s->me.mv_penalty = mv_penalty;
1073 s->fcode_tab = fcode_tab;
1074 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1075 s->min_qcoeff = -255;
1076 s->max_qcoeff = 255;
1078 s->min_qcoeff = -2047;
1079 s->max_qcoeff = 2047;
1081 if (s->intra_vlc_format) {
1082 s->intra_ac_vlc_length =
1083 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1085 s->intra_ac_vlc_length =
1086 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1088 s->inter_ac_vlc_length =
1089 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1092 #define OFFSET(x) offsetof(MpegEncContext, x)
1093 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1094 #define COMMON_OPTS \
1095 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
1096 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1097 { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1098 OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1099 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1100 OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1101 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1102 OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1104 static const AVOption mpeg1_options[] = {
1110 static const AVOption mpeg2_options[] = {
1112 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1113 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1114 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1115 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1116 { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1117 { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1122 #define mpeg12_class(x) \
1123 static const AVClass mpeg ## x ## _class = { \
1124 .class_name = "mpeg" # x "video encoder", \
1125 .item_name = av_default_item_name, \
1126 .option = mpeg ## x ## _options, \
1127 .version = LIBAVUTIL_VERSION_INT, \
1133 AVCodec ff_mpeg1video_encoder = {
1134 .name = "mpeg1video",
1135 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1136 .type = AVMEDIA_TYPE_VIDEO,
1137 .id = AV_CODEC_ID_MPEG1VIDEO,
1138 .priv_data_size = sizeof(MpegEncContext),
1139 .init = encode_init,
1140 .encode2 = ff_mpv_encode_picture,
1141 .close = ff_mpv_encode_end,
1142 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1143 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1145 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1146 .priv_class = &mpeg1_class,
1149 AVCodec ff_mpeg2video_encoder = {
1150 .name = "mpeg2video",
1151 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1152 .type = AVMEDIA_TYPE_VIDEO,
1153 .id = AV_CODEC_ID_MPEG2VIDEO,
1154 .priv_data_size = sizeof(MpegEncContext),
1155 .init = encode_init,
1156 .encode2 = ff_mpv_encode_picture,
1157 .close = ff_mpv_encode_end,
1158 .supported_framerates = ff_mpeg2_frame_rate_tab,
1159 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1162 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1163 .priv_class = &mpeg2_class,