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
31 #include "libavutil/attributes.h"
32 #include "libavutil/avassert.h"
33 #include "libavutil/log.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/thread.h"
36 #include "libavutil/timecode.h"
37 #include "libavutil/stereo3d.h"
40 #include "bytestream.h"
43 #include "mpeg12data.h"
44 #include "mpegutils.h"
45 #include "mpegvideo.h"
48 #if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
49 static const uint8_t svcd_scan_offset_placeholder[] = {
50 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
51 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
54 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
55 static uint8_t fcode_tab[MAX_MV * 2 + 1];
57 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
58 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
60 /* simple include everything table for dc, first byte is bits
61 * number next 3 are code */
62 static uint32_t mpeg1_lum_dc_uni[512];
63 static uint32_t mpeg1_chr_dc_uni[512];
65 static uint8_t mpeg1_index_run[2][64];
66 static int8_t mpeg1_max_level[2][64];
68 #define A53_MAX_CC_COUNT 0x1f
69 #endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
71 av_cold void ff_mpeg1_init_uni_ac_vlc(const RLTable *rl, uint8_t *uni_ac_vlc_len)
75 for (i = 0; i < 128; i++) {
80 for (run = 0; run < 64; run++) {
82 int alevel = FFABS(level);
84 if (alevel > rl->max_level[0][run])
85 code = 111; /* rl->n */
87 code = rl->index_run[0][run] + alevel - 1;
89 if (code < 111) { /* rl->n */
90 /* length of VLC and sign */
91 len = rl->table_vlc[code][1] + 1;
93 len = rl->table_vlc[111 /* rl->n */][1] + 6;
101 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
106 #if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
107 static int find_frame_rate_index(MpegEncContext *s)
110 AVRational bestq = (AVRational) {0, 0};
112 AVRational target = av_inv_q(s->avctx->time_base);
114 for (i = 1; i < 14; i++) {
115 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
119 for (ext.num=1; ext.num <= 4; ext.num++) {
120 for (ext.den=1; ext.den <= 32; ext.den++) {
121 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
123 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
125 if (av_gcd(ext.den, ext.num) != 1)
129 || av_nearer_q(target, bestq, q) < 0
130 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
132 s->frame_rate_index = i;
133 s->mpeg2_frame_rate_ext.num = ext.num;
134 s->mpeg2_frame_rate_ext.den = ext.den;
140 if (av_cmp_q(target, bestq))
146 static av_cold int encode_init(AVCodecContext *avctx)
149 MpegEncContext *s = avctx->priv_data;
151 if ((ret = ff_mpv_encode_init(avctx)) < 0)
154 if (find_frame_rate_index(s) < 0) {
155 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
156 av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
157 avctx->time_base.den, avctx->time_base.num);
158 return AVERROR(EINVAL);
160 av_log(avctx, AV_LOG_INFO,
161 "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
162 avctx->time_base.den, avctx->time_base.num);
166 if (avctx->profile == FF_PROFILE_UNKNOWN) {
167 if (avctx->level != FF_LEVEL_UNKNOWN) {
168 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
169 return AVERROR(EINVAL);
172 avctx->profile = s->chroma_format == CHROMA_420 ? FF_PROFILE_MPEG2_MAIN : FF_PROFILE_MPEG2_422;
175 if (avctx->level == FF_LEVEL_UNKNOWN) {
176 if (avctx->profile == FF_PROFILE_MPEG2_422) { /* 4:2:2 */
177 if (avctx->width <= 720 && avctx->height <= 608)
178 avctx->level = 5; /* Main */
180 avctx->level = 2; /* High */
182 if (avctx->profile != FF_PROFILE_MPEG2_HIGH && s->chroma_format != CHROMA_420) {
183 av_log(avctx, AV_LOG_ERROR,
184 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
185 return AVERROR(EINVAL);
187 if (avctx->width <= 720 && avctx->height <= 576)
188 avctx->level = 8; /* Main */
189 else if (avctx->width <= 1440)
190 avctx->level = 6; /* High 1440 */
192 avctx->level = 4; /* High */
196 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
197 av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
198 return AVERROR(EINVAL);
201 if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
202 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
203 av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
204 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
205 return AVERROR(EINVAL);
209 s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
210 if (s->drop_frame_timecode)
211 s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
212 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
213 av_log(avctx, AV_LOG_ERROR,
214 "Drop frame time code only allowed with 1001/30000 fps\n");
215 return AVERROR(EINVAL);
218 #if FF_API_PRIVATE_OPT
219 FF_DISABLE_DEPRECATION_WARNINGS
220 if (avctx->timecode_frame_start)
221 s->timecode_frame_start = avctx->timecode_frame_start;
222 FF_ENABLE_DEPRECATION_WARNINGS
226 AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
227 int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
230 s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
231 s->timecode_frame_start = s->tc.start;
233 s->timecode_frame_start = 0; // default is -1
239 static void put_header(MpegEncContext *s, int header)
241 align_put_bits(&s->pb);
242 put_bits(&s->pb, 16, header >> 16);
243 put_sbits(&s->pb, 16, header);
246 /* put sequence header if needed */
247 static void mpeg1_encode_sequence_header(MpegEncContext *s)
249 unsigned int vbv_buffer_size, fps, v;
250 int i, constraint_parameter_flag;
252 int64_t best_aspect_error = INT64_MAX;
253 AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
255 if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
256 aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
258 if (s->current_picture.f->key_frame) {
259 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
261 /* MPEG-1 header repeated every GOP */
262 put_header(s, SEQ_START_CODE);
264 put_sbits(&s->pb, 12, s->width & 0xFFF);
265 put_sbits(&s->pb, 12, s->height & 0xFFF);
267 for (i = 1; i < 15; i++) {
268 int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
269 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
270 error -= (1LL<<32) / ff_mpeg1_aspect[i];
272 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
274 error = FFABS(error);
276 if (error - 2 <= best_aspect_error) {
277 best_aspect_error = error;
278 s->aspect_ratio_info = i;
282 put_bits(&s->pb, 4, s->aspect_ratio_info);
283 put_bits(&s->pb, 4, s->frame_rate_index);
285 if (s->avctx->rc_max_rate) {
286 v = (s->avctx->rc_max_rate + 399) / 400;
287 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
293 if (s->avctx->rc_buffer_size)
294 vbv_buffer_size = s->avctx->rc_buffer_size;
296 /* VBV calculation: Scaled so that a VCD has the proper
297 * VBV size of 40 kilobytes */
298 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
299 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
301 put_sbits(&s->pb, 18, v);
302 put_bits(&s->pb, 1, 1); // marker
303 put_sbits(&s->pb, 10, vbv_buffer_size);
305 constraint_parameter_flag =
308 s->mb_width * s->mb_height <= 396 &&
309 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
310 framerate.num <= framerate.den * 30 &&
311 s->avctx->me_range &&
312 s->avctx->me_range < 128 &&
313 vbv_buffer_size <= 20 &&
314 v <= 1856000 / 400 &&
315 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
317 put_bits(&s->pb, 1, constraint_parameter_flag);
319 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
320 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
322 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
323 AVFrameSideData *side_data;
324 int width = s->width;
325 int height = s->height;
326 int use_seq_disp_ext;
328 put_header(s, EXT_START_CODE);
329 put_bits(&s->pb, 4, 1); // seq ext
331 put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
333 put_bits(&s->pb, 3, s->avctx->profile); // profile
334 put_bits(&s->pb, 4, s->avctx->level); // level
336 put_bits(&s->pb, 1, s->progressive_sequence);
337 put_bits(&s->pb, 2, s->chroma_format);
338 put_bits(&s->pb, 2, s->width >> 12);
339 put_bits(&s->pb, 2, s->height >> 12);
340 put_bits(&s->pb, 12, v >> 18); // bitrate ext
341 put_bits(&s->pb, 1, 1); // marker
342 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
343 put_bits(&s->pb, 1, s->low_delay);
344 put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
345 put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
347 side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
349 AVPanScan *pan_scan = (AVPanScan *)side_data->data;
350 if (pan_scan->width && pan_scan->height) {
351 width = pan_scan->width >> 4;
352 height = pan_scan->height >> 4;
356 use_seq_disp_ext = (width != s->width ||
357 height != s->height ||
358 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
359 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
360 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
361 s->video_format != VIDEO_FORMAT_UNSPECIFIED);
363 if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
364 put_header(s, EXT_START_CODE);
365 put_bits(&s->pb, 4, 2); // sequence display extension
366 put_bits(&s->pb, 3, s->video_format); // video_format
367 put_bits(&s->pb, 1, 1); // colour_description
368 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
369 put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
370 put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
371 put_bits(&s->pb, 14, width); // display_horizontal_size
372 put_bits(&s->pb, 1, 1); // marker_bit
373 put_bits(&s->pb, 14, height); // display_vertical_size
374 put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
378 put_header(s, GOP_START_CODE);
379 put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
380 /* time code: we must convert from the real frame rate to a
381 * fake MPEG frame rate in case of low frame rate */
382 fps = (framerate.num + framerate.den / 2) / framerate.den;
383 time_code = s->current_picture_ptr->f->coded_picture_number +
384 s->timecode_frame_start;
386 s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
388 av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
389 if (s->drop_frame_timecode)
390 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
392 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
393 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
394 put_bits(&s->pb, 1, 1);
395 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
396 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
397 put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
398 put_bits(&s->pb, 1, 0); // broken link
402 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
405 put_bits(&s->pb, 11, 0x008);
408 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
409 ff_mpeg12_mbAddrIncrTable[run][0]);
412 static av_always_inline void put_qscale(MpegEncContext *s)
414 put_bits(&s->pb, 5, s->qscale);
417 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
419 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
420 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
421 /* slice_vertical_position_extension */
422 put_bits(&s->pb, 3, s->mb_y >> 7);
424 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
427 /* slice extra information */
428 put_bits(&s->pb, 1, 0);
431 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
433 AVFrameSideData *side_data;
434 mpeg1_encode_sequence_header(s);
436 /* MPEG-1 picture header */
437 put_header(s, PICTURE_START_CODE);
438 /* temporal reference */
440 // RAL: s->picture_number instead of s->fake_picture_number
442 (s->picture_number - s->gop_picture_number) & 0x3ff);
443 put_bits(&s->pb, 3, s->pict_type);
445 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
446 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
448 // RAL: Forward f_code also needed for B-frames
449 if (s->pict_type == AV_PICTURE_TYPE_P ||
450 s->pict_type == AV_PICTURE_TYPE_B) {
451 put_bits(&s->pb, 1, 0); /* half pel coordinates */
452 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
453 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
455 put_bits(&s->pb, 3, 7); /* forward_f_code */
458 // RAL: Backward f_code necessary for B-frames
459 if (s->pict_type == AV_PICTURE_TYPE_B) {
460 put_bits(&s->pb, 1, 0); /* half pel coordinates */
461 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
462 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
464 put_bits(&s->pb, 3, 7); /* backward_f_code */
467 put_bits(&s->pb, 1, 0); /* extra bit picture */
469 s->frame_pred_frame_dct = 1;
470 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
471 put_header(s, EXT_START_CODE);
472 put_bits(&s->pb, 4, 8); /* pic ext */
473 if (s->pict_type == AV_PICTURE_TYPE_P ||
474 s->pict_type == AV_PICTURE_TYPE_B) {
475 put_bits(&s->pb, 4, s->f_code);
476 put_bits(&s->pb, 4, s->f_code);
478 put_bits(&s->pb, 8, 255);
480 if (s->pict_type == AV_PICTURE_TYPE_B) {
481 put_bits(&s->pb, 4, s->b_code);
482 put_bits(&s->pb, 4, s->b_code);
484 put_bits(&s->pb, 8, 255);
486 put_bits(&s->pb, 2, s->intra_dc_precision);
488 av_assert0(s->picture_structure == PICT_FRAME);
489 put_bits(&s->pb, 2, s->picture_structure);
490 if (s->progressive_sequence)
491 put_bits(&s->pb, 1, 0); /* no repeat */
493 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
494 /* XXX: optimize the generation of this flag with entropy measures */
495 s->frame_pred_frame_dct = s->progressive_sequence;
497 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
498 put_bits(&s->pb, 1, s->concealment_motion_vectors);
499 put_bits(&s->pb, 1, s->q_scale_type);
500 put_bits(&s->pb, 1, s->intra_vlc_format);
501 put_bits(&s->pb, 1, s->alternate_scan);
502 put_bits(&s->pb, 1, s->repeat_first_field);
503 s->progressive_frame = s->progressive_sequence;
504 /* chroma_420_type */
505 put_bits(&s->pb, 1, s->chroma_format ==
506 CHROMA_420 ? s->progressive_frame : 0);
507 put_bits(&s->pb, 1, s->progressive_frame);
508 put_bits(&s->pb, 1, 0); /* composite_display_flag */
510 if (s->scan_offset) {
513 put_header(s, USER_START_CODE);
514 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
515 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
517 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
518 AV_FRAME_DATA_STEREO3D);
520 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
523 switch (stereo->type) {
524 case AV_STEREO3D_SIDEBYSIDE:
527 case AV_STEREO3D_TOPBOTTOM:
533 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
542 put_header(s, USER_START_CODE);
543 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
544 put_bits(&s->pb, 8, 'P');
545 put_bits(&s->pb, 8, '3');
546 put_bits(&s->pb, 8, 'D');
547 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
549 put_bits(&s->pb, 1, 1); // reserved_bit
550 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
551 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
552 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
556 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->a53_cc) {
557 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
558 AV_FRAME_DATA_A53_CC);
560 if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
563 put_header (s, USER_START_CODE);
565 put_bits(&s->pb, 8, 'G'); // user_identifier
566 put_bits(&s->pb, 8, 'A');
567 put_bits(&s->pb, 8, '9');
568 put_bits(&s->pb, 8, '4');
569 put_bits(&s->pb, 8, 3); // user_data_type_code
571 (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
572 put_bits(&s->pb, 8, 0xff); // em_data
574 for (i = 0; i < side_data->size; i++)
575 put_bits(&s->pb, 8, side_data->data[i]);
577 put_bits(&s->pb, 8, 0xff); // marker_bits
579 av_log(s->avctx, AV_LOG_WARNING,
580 "Warning Closed Caption size (%d) can not exceed 93 bytes "
581 "and must be a multiple of 3\n", side_data->size);
587 ff_mpeg1_encode_slice_header(s);
590 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
591 int has_mv, int field_motion)
593 put_bits(&s->pb, n, bits);
594 if (!s->frame_pred_frame_dct) {
596 /* motion_type: frame/field */
597 put_bits(&s->pb, 2, 2 - field_motion);
598 put_bits(&s->pb, 1, s->interlaced_dct);
602 // RAL: Parameter added: f_or_b_code
603 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
608 ff_mpeg12_mbMotionVectorTable[0][1],
609 ff_mpeg12_mbMotionVectorTable[0][0]);
611 int code, sign, bits;
612 int bit_size = f_or_b_code - 1;
613 int range = 1 << bit_size;
614 /* modulo encoding */
615 val = sign_extend(val, 5 + bit_size);
619 code = (val >> bit_size) + 1;
620 bits = val & (range - 1);
625 code = (val >> bit_size) + 1;
626 bits = val & (range - 1);
630 av_assert2(code > 0 && code <= 16);
633 ff_mpeg12_mbMotionVectorTable[code][1],
634 ff_mpeg12_mbMotionVectorTable[code][0]);
636 put_bits(&s->pb, 1, sign);
638 put_bits(&s->pb, bit_size, bits);
642 static inline void encode_dc(MpegEncContext *s, int diff, int component)
644 unsigned int diff_u = diff + 255;
649 index = av_log2_16bit(-2 * diff);
652 index = av_log2_16bit(2 * diff);
656 ff_mpeg12_vlc_dc_lum_bits[index] + index,
657 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
658 av_mod_uintp2(diff, index));
661 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
662 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
663 av_mod_uintp2(diff, index));
667 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
668 mpeg1_lum_dc_uni[diff + 255] >> 8);
671 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
672 mpeg1_chr_dc_uni[diff + 255] >> 8);
676 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
678 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
680 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
682 last_index = s->block_last_index[n];
686 component = (n <= 3 ? 0 : (n & 1) + 1);
687 dc = block[0]; /* overflow is impossible */
688 diff = dc - s->last_dc[component];
689 encode_dc(s, diff, component);
690 s->last_dc[component] = dc;
692 if (s->intra_vlc_format)
693 table_vlc = ff_rl_mpeg2.table_vlc;
695 /* encode the first coefficient: needs to be done here because
696 * it is handled slightly differently */
698 if (abs(level) == 1) {
699 code = ((uint32_t)level >> 31); /* the sign bit */
700 put_bits(&s->pb, 2, code | 0x02);
709 /* now quantify & encode AC coefs */
710 last_non_zero = i - 1;
712 for (; i <= last_index; i++) {
713 j = s->intra_scantable.permutated[i];
717 /* encode using VLC */
719 run = i - last_non_zero - 1;
722 MASK_ABS(sign, alevel);
725 if (alevel <= mpeg1_max_level[0][run]) {
726 code = mpeg1_index_run[0][run] + alevel - 1;
727 /* store the VLC & sign at once */
728 put_bits(&s->pb, table_vlc[code][1] + 1,
729 (table_vlc[code][0] << 1) + sign);
731 /* escape seems to be pretty rare <5% so I do not optimize it */
732 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
733 /* escape: only clip in this case */
734 put_bits(&s->pb, 6, run);
735 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
737 put_sbits(&s->pb, 8, level);
740 put_bits(&s->pb, 16, 0x8001 + level + 255);
742 put_sbits(&s->pb, 16, level);
745 put_sbits(&s->pb, 12, level);
752 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
755 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
756 int16_t block[8][64],
757 int motion_x, int motion_y,
761 const int mb_x = s->mb_x;
762 const int mb_y = s->mb_y;
763 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
767 for (i = 0; i < mb_block_count; i++)
768 if (s->block_last_index[i] >= 0)
769 cbp |= 1 << (mb_block_count - 1 - i);
771 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
772 (mb_x != s->mb_width - 1 ||
773 (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
774 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
775 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
776 (((s->mv_dir & MV_DIR_FORWARD)
777 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
778 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
779 ((s->mv_dir & MV_DIR_BACKWARD)
780 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
781 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
783 s->qscale -= s->dquant;
787 if (s->pict_type == AV_PICTURE_TYPE_P) {
788 s->last_mv[0][0][0] =
789 s->last_mv[0][0][1] =
790 s->last_mv[0][1][0] =
791 s->last_mv[0][1][1] = 0;
795 av_assert0(s->mb_skip_run == 0);
796 encode_mb_skip_run(s, s->mb_x);
798 encode_mb_skip_run(s, s->mb_skip_run);
801 if (s->pict_type == AV_PICTURE_TYPE_I) {
802 if (s->dquant && cbp) {
803 /* macroblock_type: macroblock_quant = 1 */
804 put_mb_modes(s, 2, 1, 0, 0);
807 /* macroblock_type: macroblock_quant = 0 */
808 put_mb_modes(s, 1, 1, 0, 0);
809 s->qscale -= s->dquant;
811 s->misc_bits += get_bits_diff(s);
813 } else if (s->mb_intra) {
814 if (s->dquant && cbp) {
815 put_mb_modes(s, 6, 0x01, 0, 0);
818 put_mb_modes(s, 5, 0x03, 0, 0);
819 s->qscale -= s->dquant;
821 s->misc_bits += get_bits_diff(s);
823 memset(s->last_mv, 0, sizeof(s->last_mv));
824 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
825 if (s->mv_type == MV_TYPE_16X16) {
827 if ((motion_x | motion_y) == 0) {
829 /* macroblock_pattern & quant */
830 put_mb_modes(s, 5, 1, 0, 0);
833 /* macroblock_pattern only */
834 put_mb_modes(s, 2, 1, 0, 0);
836 s->misc_bits += get_bits_diff(s);
839 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
842 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
844 s->misc_bits += get_bits_diff(s);
845 // RAL: f_code parameter added
846 mpeg1_encode_motion(s,
847 motion_x - s->last_mv[0][0][0],
849 // RAL: f_code parameter added
850 mpeg1_encode_motion(s,
851 motion_y - s->last_mv[0][0][1],
853 s->mv_bits += get_bits_diff(s);
856 put_bits(&s->pb, 3, 1); /* motion only */
857 if (!s->frame_pred_frame_dct)
858 put_bits(&s->pb, 2, 2); /* motion_type: frame */
859 s->misc_bits += get_bits_diff(s);
860 // RAL: f_code parameter added
861 mpeg1_encode_motion(s,
862 motion_x - s->last_mv[0][0][0],
864 // RAL: f_code parameter added
865 mpeg1_encode_motion(s,
866 motion_y - s->last_mv[0][0][1],
868 s->qscale -= s->dquant;
869 s->mv_bits += get_bits_diff(s);
871 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
872 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
874 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
878 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
881 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
884 put_bits(&s->pb, 3, 1); /* motion only */
885 put_bits(&s->pb, 2, 1); /* motion_type: field */
886 s->qscale -= s->dquant;
888 s->misc_bits += get_bits_diff(s);
889 for (i = 0; i < 2; i++) {
890 put_bits(&s->pb, 1, s->field_select[0][i]);
891 mpeg1_encode_motion(s,
892 s->mv[0][i][0] - s->last_mv[0][i][0],
894 mpeg1_encode_motion(s,
895 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
897 s->last_mv[0][i][0] = s->mv[0][i][0];
898 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
900 s->mv_bits += get_bits_diff(s);
903 if (s->chroma_y_shift) {
905 ff_mpeg12_mbPatTable[cbp][1],
906 ff_mpeg12_mbPatTable[cbp][0]);
909 ff_mpeg12_mbPatTable[cbp >> 2][1],
910 ff_mpeg12_mbPatTable[cbp >> 2][0]);
911 put_sbits(&s->pb, 2, cbp);
916 if (s->mv_type == MV_TYPE_16X16) {
917 if (cbp) { // With coded bloc pattern
919 if (s->mv_dir == MV_DIR_FORWARD)
920 put_mb_modes(s, 6, 3, 1, 0);
922 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
925 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
927 } else { // No coded bloc pattern
928 put_bits(&s->pb, 5 - s->mv_dir, 2);
929 if (!s->frame_pred_frame_dct)
930 put_bits(&s->pb, 2, 2); /* motion_type: frame */
931 s->qscale -= s->dquant;
933 s->misc_bits += get_bits_diff(s);
934 if (s->mv_dir & MV_DIR_FORWARD) {
935 mpeg1_encode_motion(s,
936 s->mv[0][0][0] - s->last_mv[0][0][0],
938 mpeg1_encode_motion(s,
939 s->mv[0][0][1] - s->last_mv[0][0][1],
941 s->last_mv[0][0][0] =
942 s->last_mv[0][1][0] = s->mv[0][0][0];
943 s->last_mv[0][0][1] =
944 s->last_mv[0][1][1] = s->mv[0][0][1];
947 if (s->mv_dir & MV_DIR_BACKWARD) {
948 mpeg1_encode_motion(s,
949 s->mv[1][0][0] - s->last_mv[1][0][0],
951 mpeg1_encode_motion(s,
952 s->mv[1][0][1] - s->last_mv[1][0][1],
954 s->last_mv[1][0][0] =
955 s->last_mv[1][1][0] = s->mv[1][0][0];
956 s->last_mv[1][0][1] =
957 s->last_mv[1][1][1] = s->mv[1][0][1];
961 av_assert2(s->mv_type == MV_TYPE_FIELD);
962 av_assert2(!s->frame_pred_frame_dct);
963 if (cbp) { // With coded bloc pattern
965 if (s->mv_dir == MV_DIR_FORWARD)
966 put_mb_modes(s, 6, 3, 1, 1);
968 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
971 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
973 } else { // No coded bloc pattern
974 put_bits(&s->pb, 5 - s->mv_dir, 2);
975 put_bits(&s->pb, 2, 1); /* motion_type: field */
976 s->qscale -= s->dquant;
978 s->misc_bits += get_bits_diff(s);
979 if (s->mv_dir & MV_DIR_FORWARD) {
980 for (i = 0; i < 2; i++) {
981 put_bits(&s->pb, 1, s->field_select[0][i]);
982 mpeg1_encode_motion(s,
983 s->mv[0][i][0] - s->last_mv[0][i][0],
985 mpeg1_encode_motion(s,
986 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
988 s->last_mv[0][i][0] = s->mv[0][i][0];
989 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
993 if (s->mv_dir & MV_DIR_BACKWARD) {
994 for (i = 0; i < 2; i++) {
995 put_bits(&s->pb, 1, s->field_select[1][i]);
996 mpeg1_encode_motion(s,
997 s->mv[1][i][0] - s->last_mv[1][i][0],
999 mpeg1_encode_motion(s,
1000 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
1002 s->last_mv[1][i][0] = s->mv[1][i][0];
1003 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
1008 s->mv_bits += get_bits_diff(s);
1010 if (s->chroma_y_shift) {
1012 ff_mpeg12_mbPatTable[cbp][1],
1013 ff_mpeg12_mbPatTable[cbp][0]);
1016 ff_mpeg12_mbPatTable[cbp >> 2][1],
1017 ff_mpeg12_mbPatTable[cbp >> 2][0]);
1018 put_sbits(&s->pb, 2, cbp);
1022 for (i = 0; i < mb_block_count; i++)
1023 if (cbp & (1 << (mb_block_count - 1 - i)))
1024 mpeg1_encode_block(s, block[i], i);
1027 s->i_tex_bits += get_bits_diff(s);
1029 s->p_tex_bits += get_bits_diff(s);
1033 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1034 int motion_x, int motion_y)
1036 if (s->chroma_format == CHROMA_420)
1037 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1039 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1042 static av_cold void mpeg12_encode_init_static(void)
1044 static uint8_t mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
1046 ff_rl_init(&ff_rl_mpeg1, mpeg12_static_rl_table_store[0]);
1047 ff_rl_init(&ff_rl_mpeg2, mpeg12_static_rl_table_store[1]);
1049 for (int i = 0; i < 64; i++) {
1050 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1051 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1054 ff_mpeg1_init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1055 ff_mpeg1_init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1057 /* build unified dc encoding tables */
1058 for (int i = -255; i < 256; i++) {
1063 adiff = FFABS(diff);
1066 index = av_log2(2 * adiff);
1068 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1069 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1070 av_mod_uintp2(diff, index);
1071 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1073 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1074 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1075 av_mod_uintp2(diff, index);
1076 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1079 for (int f_code = 1; f_code <= MAX_FCODE; f_code++)
1080 for (int mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1084 len = ff_mpeg12_mbMotionVectorTable[0][1];
1086 int val, bit_size, code;
1088 bit_size = f_code - 1;
1094 code = (val >> bit_size) + 1;
1096 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1099 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1103 mv_penalty[f_code][mv + MAX_DMV] = len;
1107 for (int f_code = MAX_FCODE; f_code > 0; f_code--)
1108 for (int mv = -(8 << f_code); mv < (8 << f_code); mv++)
1109 fcode_tab[mv + MAX_MV] = f_code;
1112 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1114 static AVOnce init_static_once = AV_ONCE_INIT;
1116 ff_mpeg12_common_init(s);
1118 s->me.mv_penalty = mv_penalty;
1119 s->fcode_tab = fcode_tab;
1120 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1121 s->min_qcoeff = -255;
1122 s->max_qcoeff = 255;
1124 s->min_qcoeff = -2047;
1125 s->max_qcoeff = 2047;
1127 if (s->intra_vlc_format) {
1128 s->intra_ac_vlc_length =
1129 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1131 s->intra_ac_vlc_length =
1132 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1134 s->inter_ac_vlc_length =
1135 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1137 ff_thread_once(&init_static_once, mpeg12_encode_init_static);
1140 #define OFFSET(x) offsetof(MpegEncContext, x)
1141 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1142 #define COMMON_OPTS \
1143 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1144 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
1145 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1146 OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1147 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1148 OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1149 { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1150 OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1152 static const AVOption mpeg1_options[] = {
1158 static const AVOption mpeg2_options[] = {
1160 { "intra_vlc", "Use MPEG-2 intra VLC table.",
1161 OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1162 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1163 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1164 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1165 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1166 { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1167 { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1168 { "video_format", "Video_format in the sequence_display_extension indicating the source of the video.", OFFSET(video_format), AV_OPT_TYPE_INT, { .i64 = VIDEO_FORMAT_UNSPECIFIED }, 0, 7, VE, "video_format" },
1169 { "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, "video_format" },
1170 { "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, "video_format" },
1171 { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, "video_format" },
1172 { "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, "video_format" },
1173 { "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, "video_format" },
1174 { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, "video_format" },
1175 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, "avctx.level"
1176 { LEVEL("high", 4) },
1177 { LEVEL("high1440", 6) },
1178 { LEVEL("main", 8) },
1179 { LEVEL("low", 10) },
1182 FF_MPEG2_PROFILE_OPTS
1186 #define mpeg12_class(x) \
1187 static const AVClass mpeg ## x ## _class = { \
1188 .class_name = "mpeg" # x "video encoder", \
1189 .item_name = av_default_item_name, \
1190 .option = mpeg ## x ## _options, \
1191 .version = LIBAVUTIL_VERSION_INT, \
1197 AVCodec ff_mpeg1video_encoder = {
1198 .name = "mpeg1video",
1199 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1200 .type = AVMEDIA_TYPE_VIDEO,
1201 .id = AV_CODEC_ID_MPEG1VIDEO,
1202 .priv_data_size = sizeof(MpegEncContext),
1203 .init = encode_init,
1204 .encode2 = ff_mpv_encode_picture,
1205 .close = ff_mpv_encode_end,
1206 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1207 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1209 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1210 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1211 .priv_class = &mpeg1_class,
1214 AVCodec ff_mpeg2video_encoder = {
1215 .name = "mpeg2video",
1216 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1217 .type = AVMEDIA_TYPE_VIDEO,
1218 .id = AV_CODEC_ID_MPEG2VIDEO,
1219 .priv_data_size = sizeof(MpegEncContext),
1220 .init = encode_init,
1221 .encode2 = ff_mpv_encode_picture,
1222 .close = ff_mpv_encode_end,
1223 .supported_framerates = ff_mpeg2_frame_rate_tab,
1224 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1227 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1228 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1229 .priv_class = &mpeg2_class,
1231 #endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */