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"
46 static const uint8_t svcd_scan_offset_placeholder[] = {
47 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
48 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
51 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
52 static uint8_t fcode_tab[MAX_MV * 2 + 1];
54 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
55 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
57 /* simple include everything table for dc, first byte is bits
58 * number next 3 are code */
59 static uint32_t mpeg1_lum_dc_uni[512];
60 static uint32_t mpeg1_chr_dc_uni[512];
62 static uint8_t mpeg1_index_run[2][64];
63 static int8_t mpeg1_max_level[2][64];
65 #define A53_MAX_CC_COUNT 0x1f
67 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
71 for (i = 0; i < 128; i++) {
76 for (run = 0; run < 64; run++) {
78 int alevel = FFABS(level);
80 if (alevel > rl->max_level[0][run])
81 code = 111; /* rl->n */
83 code = rl->index_run[0][run] + alevel - 1;
85 if (code < 111) { /* rl->n */
86 /* length of VLC and sign */
87 len = rl->table_vlc[code][1] + 1;
89 len = rl->table_vlc[111 /* rl->n */][1] + 6;
97 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
102 static int find_frame_rate_index(MpegEncContext *s)
105 AVRational bestq = (AVRational) {0, 0};
107 AVRational target = av_inv_q(s->avctx->time_base);
109 for (i = 1; i < 14; i++) {
110 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
114 for (ext.num=1; ext.num <= 4; ext.num++) {
115 for (ext.den=1; ext.den <= 32; ext.den++) {
116 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
118 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
120 if (av_gcd(ext.den, ext.num) != 1)
124 || av_nearer_q(target, bestq, q) < 0
125 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
127 s->frame_rate_index = i;
128 s->mpeg2_frame_rate_ext.num = ext.num;
129 s->mpeg2_frame_rate_ext.den = ext.den;
135 if (av_cmp_q(target, bestq))
141 static av_cold int encode_init(AVCodecContext *avctx)
144 MpegEncContext *s = avctx->priv_data;
146 if ((ret = ff_mpv_encode_init(avctx)) < 0)
149 if (find_frame_rate_index(s) < 0) {
150 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
151 av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
152 avctx->time_base.den, avctx->time_base.num);
153 return AVERROR(EINVAL);
155 av_log(avctx, AV_LOG_INFO,
156 "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
157 avctx->time_base.den, avctx->time_base.num);
161 if (avctx->profile == FF_PROFILE_UNKNOWN) {
162 if (avctx->level != FF_LEVEL_UNKNOWN) {
163 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
164 return AVERROR(EINVAL);
167 avctx->profile = s->chroma_format == CHROMA_420 ? FF_PROFILE_MPEG2_MAIN : FF_PROFILE_MPEG2_422;
170 if (avctx->level == FF_LEVEL_UNKNOWN) {
171 if (avctx->profile == FF_PROFILE_MPEG2_422) { /* 4:2:2 */
172 if (avctx->width <= 720 && avctx->height <= 608)
173 avctx->level = 5; /* Main */
175 avctx->level = 2; /* High */
177 if (avctx->profile != FF_PROFILE_MPEG2_HIGH && s->chroma_format != CHROMA_420) {
178 av_log(avctx, AV_LOG_ERROR,
179 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
180 return AVERROR(EINVAL);
182 if (avctx->width <= 720 && avctx->height <= 576)
183 avctx->level = 8; /* Main */
184 else if (avctx->width <= 1440)
185 avctx->level = 6; /* High 1440 */
187 avctx->level = 4; /* High */
191 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
192 av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
193 return AVERROR(EINVAL);
196 if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
197 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
198 av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
199 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
200 return AVERROR(EINVAL);
204 s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
205 if (s->drop_frame_timecode)
206 s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
207 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
208 av_log(avctx, AV_LOG_ERROR,
209 "Drop frame time code only allowed with 1001/30000 fps\n");
210 return AVERROR(EINVAL);
213 #if FF_API_PRIVATE_OPT
214 FF_DISABLE_DEPRECATION_WARNINGS
215 if (avctx->timecode_frame_start)
216 s->timecode_frame_start = avctx->timecode_frame_start;
217 FF_ENABLE_DEPRECATION_WARNINGS
221 AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
222 int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
225 s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
226 s->timecode_frame_start = s->tc.start;
228 s->timecode_frame_start = 0; // default is -1
234 static void put_header(MpegEncContext *s, int header)
236 avpriv_align_put_bits(&s->pb);
237 put_bits(&s->pb, 16, header >> 16);
238 put_sbits(&s->pb, 16, header);
241 /* put sequence header if needed */
242 static void mpeg1_encode_sequence_header(MpegEncContext *s)
244 unsigned int vbv_buffer_size, fps, v;
245 int i, constraint_parameter_flag;
247 int64_t best_aspect_error = INT64_MAX;
248 AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
250 if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
251 aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
253 if (s->current_picture.f->key_frame) {
254 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
256 /* MPEG-1 header repeated every GOP */
257 put_header(s, SEQ_START_CODE);
259 put_sbits(&s->pb, 12, s->width & 0xFFF);
260 put_sbits(&s->pb, 12, s->height & 0xFFF);
262 for (i = 1; i < 15; i++) {
263 int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
264 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
265 error -= (1LL<<32) / ff_mpeg1_aspect[i];
267 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
269 error = FFABS(error);
271 if (error - 2 <= best_aspect_error) {
272 best_aspect_error = error;
273 s->aspect_ratio_info = i;
277 put_bits(&s->pb, 4, s->aspect_ratio_info);
278 put_bits(&s->pb, 4, s->frame_rate_index);
280 if (s->avctx->rc_max_rate) {
281 v = (s->avctx->rc_max_rate + 399) / 400;
282 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
288 if (s->avctx->rc_buffer_size)
289 vbv_buffer_size = s->avctx->rc_buffer_size;
291 /* VBV calculation: Scaled so that a VCD has the proper
292 * VBV size of 40 kilobytes */
293 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
294 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
296 put_sbits(&s->pb, 18, v);
297 put_bits(&s->pb, 1, 1); // marker
298 put_sbits(&s->pb, 10, vbv_buffer_size);
300 constraint_parameter_flag =
303 s->mb_width * s->mb_height <= 396 &&
304 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
305 framerate.num <= framerate.den * 30 &&
306 s->avctx->me_range &&
307 s->avctx->me_range < 128 &&
308 vbv_buffer_size <= 20 &&
309 v <= 1856000 / 400 &&
310 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
312 put_bits(&s->pb, 1, constraint_parameter_flag);
314 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
315 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
317 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
318 AVFrameSideData *side_data;
319 int width = s->width;
320 int height = s->height;
321 int use_seq_disp_ext;
323 put_header(s, EXT_START_CODE);
324 put_bits(&s->pb, 4, 1); // seq ext
326 put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
328 put_bits(&s->pb, 3, s->avctx->profile); // profile
329 put_bits(&s->pb, 4, s->avctx->level); // level
331 put_bits(&s->pb, 1, s->progressive_sequence);
332 put_bits(&s->pb, 2, s->chroma_format);
333 put_bits(&s->pb, 2, s->width >> 12);
334 put_bits(&s->pb, 2, s->height >> 12);
335 put_bits(&s->pb, 12, v >> 18); // bitrate ext
336 put_bits(&s->pb, 1, 1); // marker
337 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
338 put_bits(&s->pb, 1, s->low_delay);
339 put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
340 put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
342 side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
344 AVPanScan *pan_scan = (AVPanScan *)side_data->data;
345 if (pan_scan->width && pan_scan->height) {
346 width = pan_scan->width >> 4;
347 height = pan_scan->height >> 4;
351 use_seq_disp_ext = (width != s->width ||
352 height != s->height ||
353 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
354 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
355 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
356 s->video_format != VIDEO_FORMAT_UNSPECIFIED);
358 if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
359 put_header(s, EXT_START_CODE);
360 put_bits(&s->pb, 4, 2); // sequence display extension
361 put_bits(&s->pb, 3, s->video_format); // video_format
362 put_bits(&s->pb, 1, 1); // colour_description
363 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
364 put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
365 put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
366 put_bits(&s->pb, 14, width); // display_horizontal_size
367 put_bits(&s->pb, 1, 1); // marker_bit
368 put_bits(&s->pb, 14, height); // display_vertical_size
369 put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
373 put_header(s, GOP_START_CODE);
374 put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
375 /* time code: we must convert from the real frame rate to a
376 * fake MPEG frame rate in case of low frame rate */
377 fps = (framerate.num + framerate.den / 2) / framerate.den;
378 time_code = s->current_picture_ptr->f->coded_picture_number +
379 s->timecode_frame_start;
381 s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
383 av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
384 if (s->drop_frame_timecode)
385 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
387 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
388 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
389 put_bits(&s->pb, 1, 1);
390 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
391 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
392 put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
393 put_bits(&s->pb, 1, 0); // broken link
397 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
400 put_bits(&s->pb, 11, 0x008);
403 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
404 ff_mpeg12_mbAddrIncrTable[run][0]);
407 static av_always_inline void put_qscale(MpegEncContext *s)
409 put_bits(&s->pb, 5, s->qscale);
412 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
414 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
415 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
416 /* slice_vertical_position_extension */
417 put_bits(&s->pb, 3, s->mb_y >> 7);
419 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
422 /* slice extra information */
423 put_bits(&s->pb, 1, 0);
426 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
428 AVFrameSideData *side_data;
429 mpeg1_encode_sequence_header(s);
431 /* MPEG-1 picture header */
432 put_header(s, PICTURE_START_CODE);
433 /* temporal reference */
435 // RAL: s->picture_number instead of s->fake_picture_number
437 (s->picture_number - s->gop_picture_number) & 0x3ff);
438 put_bits(&s->pb, 3, s->pict_type);
440 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
441 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
443 // RAL: Forward f_code also needed for B-frames
444 if (s->pict_type == AV_PICTURE_TYPE_P ||
445 s->pict_type == AV_PICTURE_TYPE_B) {
446 put_bits(&s->pb, 1, 0); /* half pel coordinates */
447 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
448 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
450 put_bits(&s->pb, 3, 7); /* forward_f_code */
453 // RAL: Backward f_code necessary for B-frames
454 if (s->pict_type == AV_PICTURE_TYPE_B) {
455 put_bits(&s->pb, 1, 0); /* half pel coordinates */
456 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
457 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
459 put_bits(&s->pb, 3, 7); /* backward_f_code */
462 put_bits(&s->pb, 1, 0); /* extra bit picture */
464 s->frame_pred_frame_dct = 1;
465 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
466 put_header(s, EXT_START_CODE);
467 put_bits(&s->pb, 4, 8); /* pic ext */
468 if (s->pict_type == AV_PICTURE_TYPE_P ||
469 s->pict_type == AV_PICTURE_TYPE_B) {
470 put_bits(&s->pb, 4, s->f_code);
471 put_bits(&s->pb, 4, s->f_code);
473 put_bits(&s->pb, 8, 255);
475 if (s->pict_type == AV_PICTURE_TYPE_B) {
476 put_bits(&s->pb, 4, s->b_code);
477 put_bits(&s->pb, 4, s->b_code);
479 put_bits(&s->pb, 8, 255);
481 put_bits(&s->pb, 2, s->intra_dc_precision);
483 av_assert0(s->picture_structure == PICT_FRAME);
484 put_bits(&s->pb, 2, s->picture_structure);
485 if (s->progressive_sequence)
486 put_bits(&s->pb, 1, 0); /* no repeat */
488 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
489 /* XXX: optimize the generation of this flag with entropy measures */
490 s->frame_pred_frame_dct = s->progressive_sequence;
492 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
493 put_bits(&s->pb, 1, s->concealment_motion_vectors);
494 put_bits(&s->pb, 1, s->q_scale_type);
495 put_bits(&s->pb, 1, s->intra_vlc_format);
496 put_bits(&s->pb, 1, s->alternate_scan);
497 put_bits(&s->pb, 1, s->repeat_first_field);
498 s->progressive_frame = s->progressive_sequence;
499 /* chroma_420_type */
500 put_bits(&s->pb, 1, s->chroma_format ==
501 CHROMA_420 ? s->progressive_frame : 0);
502 put_bits(&s->pb, 1, s->progressive_frame);
503 put_bits(&s->pb, 1, 0); /* composite_display_flag */
505 if (s->scan_offset) {
508 put_header(s, USER_START_CODE);
509 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
510 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
512 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
513 AV_FRAME_DATA_STEREO3D);
515 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
518 switch (stereo->type) {
519 case AV_STEREO3D_SIDEBYSIDE:
522 case AV_STEREO3D_TOPBOTTOM:
528 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
537 put_header(s, USER_START_CODE);
538 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
539 put_bits(&s->pb, 8, 'P');
540 put_bits(&s->pb, 8, '3');
541 put_bits(&s->pb, 8, 'D');
542 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
544 put_bits(&s->pb, 1, 1); // reserved_bit
545 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
546 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
547 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
551 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->a53_cc) {
552 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
553 AV_FRAME_DATA_A53_CC);
555 if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
558 put_header (s, USER_START_CODE);
560 put_bits(&s->pb, 8, 'G'); // user_identifier
561 put_bits(&s->pb, 8, 'A');
562 put_bits(&s->pb, 8, '9');
563 put_bits(&s->pb, 8, '4');
564 put_bits(&s->pb, 8, 3); // user_data_type_code
566 (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
567 put_bits(&s->pb, 8, 0xff); // em_data
569 for (i = 0; i < side_data->size; i++)
570 put_bits(&s->pb, 8, side_data->data[i]);
572 put_bits(&s->pb, 8, 0xff); // marker_bits
574 av_log(s->avctx, AV_LOG_WARNING,
575 "Warning Closed Caption size (%d) can not exceed 93 bytes "
576 "and must be a multiple of 3\n", side_data->size);
582 ff_mpeg1_encode_slice_header(s);
585 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
586 int has_mv, int field_motion)
588 put_bits(&s->pb, n, bits);
589 if (!s->frame_pred_frame_dct) {
591 /* motion_type: frame/field */
592 put_bits(&s->pb, 2, 2 - field_motion);
593 put_bits(&s->pb, 1, s->interlaced_dct);
597 // RAL: Parameter added: f_or_b_code
598 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
603 ff_mpeg12_mbMotionVectorTable[0][1],
604 ff_mpeg12_mbMotionVectorTable[0][0]);
606 int code, sign, bits;
607 int bit_size = f_or_b_code - 1;
608 int range = 1 << bit_size;
609 /* modulo encoding */
610 val = sign_extend(val, 5 + bit_size);
614 code = (val >> bit_size) + 1;
615 bits = val & (range - 1);
620 code = (val >> bit_size) + 1;
621 bits = val & (range - 1);
625 av_assert2(code > 0 && code <= 16);
628 ff_mpeg12_mbMotionVectorTable[code][1],
629 ff_mpeg12_mbMotionVectorTable[code][0]);
631 put_bits(&s->pb, 1, sign);
633 put_bits(&s->pb, bit_size, bits);
637 static inline void encode_dc(MpegEncContext *s, int diff, int component)
639 unsigned int diff_u = diff + 255;
644 index = av_log2_16bit(-2 * diff);
647 index = av_log2_16bit(2 * diff);
651 ff_mpeg12_vlc_dc_lum_bits[index] + index,
652 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
653 av_mod_uintp2(diff, index));
656 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
657 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
658 av_mod_uintp2(diff, index));
662 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
663 mpeg1_lum_dc_uni[diff + 255] >> 8);
666 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
667 mpeg1_chr_dc_uni[diff + 255] >> 8);
671 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
673 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
675 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
677 last_index = s->block_last_index[n];
681 component = (n <= 3 ? 0 : (n & 1) + 1);
682 dc = block[0]; /* overflow is impossible */
683 diff = dc - s->last_dc[component];
684 encode_dc(s, diff, component);
685 s->last_dc[component] = dc;
687 if (s->intra_vlc_format)
688 table_vlc = ff_rl_mpeg2.table_vlc;
690 /* encode the first coefficient: needs to be done here because
691 * it is handled slightly differently */
693 if (abs(level) == 1) {
694 code = ((uint32_t)level >> 31); /* the sign bit */
695 put_bits(&s->pb, 2, code | 0x02);
704 /* now quantify & encode AC coefs */
705 last_non_zero = i - 1;
707 for (; i <= last_index; i++) {
708 j = s->intra_scantable.permutated[i];
712 /* encode using VLC */
714 run = i - last_non_zero - 1;
717 MASK_ABS(sign, alevel);
720 if (alevel <= mpeg1_max_level[0][run]) {
721 code = mpeg1_index_run[0][run] + alevel - 1;
722 /* store the VLC & sign at once */
723 put_bits(&s->pb, table_vlc[code][1] + 1,
724 (table_vlc[code][0] << 1) + sign);
726 /* escape seems to be pretty rare <5% so I do not optimize it */
727 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
728 /* escape: only clip in this case */
729 put_bits(&s->pb, 6, run);
730 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
732 put_sbits(&s->pb, 8, level);
735 put_bits(&s->pb, 16, 0x8001 + level + 255);
737 put_sbits(&s->pb, 16, level);
740 put_sbits(&s->pb, 12, level);
747 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
750 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
751 int16_t block[8][64],
752 int motion_x, int motion_y,
756 const int mb_x = s->mb_x;
757 const int mb_y = s->mb_y;
758 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
762 for (i = 0; i < mb_block_count; i++)
763 if (s->block_last_index[i] >= 0)
764 cbp |= 1 << (mb_block_count - 1 - i);
766 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
767 (mb_x != s->mb_width - 1 ||
768 (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
769 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
770 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
771 (((s->mv_dir & MV_DIR_FORWARD)
772 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
773 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
774 ((s->mv_dir & MV_DIR_BACKWARD)
775 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
776 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
778 s->qscale -= s->dquant;
782 if (s->pict_type == AV_PICTURE_TYPE_P) {
783 s->last_mv[0][0][0] =
784 s->last_mv[0][0][1] =
785 s->last_mv[0][1][0] =
786 s->last_mv[0][1][1] = 0;
790 av_assert0(s->mb_skip_run == 0);
791 encode_mb_skip_run(s, s->mb_x);
793 encode_mb_skip_run(s, s->mb_skip_run);
796 if (s->pict_type == AV_PICTURE_TYPE_I) {
797 if (s->dquant && cbp) {
798 /* macroblock_type: macroblock_quant = 1 */
799 put_mb_modes(s, 2, 1, 0, 0);
802 /* macroblock_type: macroblock_quant = 0 */
803 put_mb_modes(s, 1, 1, 0, 0);
804 s->qscale -= s->dquant;
806 s->misc_bits += get_bits_diff(s);
808 } else if (s->mb_intra) {
809 if (s->dquant && cbp) {
810 put_mb_modes(s, 6, 0x01, 0, 0);
813 put_mb_modes(s, 5, 0x03, 0, 0);
814 s->qscale -= s->dquant;
816 s->misc_bits += get_bits_diff(s);
818 memset(s->last_mv, 0, sizeof(s->last_mv));
819 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
820 if (s->mv_type == MV_TYPE_16X16) {
822 if ((motion_x | motion_y) == 0) {
824 /* macroblock_pattern & quant */
825 put_mb_modes(s, 5, 1, 0, 0);
828 /* macroblock_pattern only */
829 put_mb_modes(s, 2, 1, 0, 0);
831 s->misc_bits += get_bits_diff(s);
834 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
837 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
839 s->misc_bits += get_bits_diff(s);
840 // RAL: f_code parameter added
841 mpeg1_encode_motion(s,
842 motion_x - s->last_mv[0][0][0],
844 // RAL: f_code parameter added
845 mpeg1_encode_motion(s,
846 motion_y - s->last_mv[0][0][1],
848 s->mv_bits += get_bits_diff(s);
851 put_bits(&s->pb, 3, 1); /* motion only */
852 if (!s->frame_pred_frame_dct)
853 put_bits(&s->pb, 2, 2); /* motion_type: frame */
854 s->misc_bits += get_bits_diff(s);
855 // RAL: f_code parameter added
856 mpeg1_encode_motion(s,
857 motion_x - s->last_mv[0][0][0],
859 // RAL: f_code parameter added
860 mpeg1_encode_motion(s,
861 motion_y - s->last_mv[0][0][1],
863 s->qscale -= s->dquant;
864 s->mv_bits += get_bits_diff(s);
866 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
867 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
869 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
873 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
876 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
879 put_bits(&s->pb, 3, 1); /* motion only */
880 put_bits(&s->pb, 2, 1); /* motion_type: field */
881 s->qscale -= s->dquant;
883 s->misc_bits += get_bits_diff(s);
884 for (i = 0; i < 2; i++) {
885 put_bits(&s->pb, 1, s->field_select[0][i]);
886 mpeg1_encode_motion(s,
887 s->mv[0][i][0] - s->last_mv[0][i][0],
889 mpeg1_encode_motion(s,
890 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
892 s->last_mv[0][i][0] = s->mv[0][i][0];
893 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
895 s->mv_bits += get_bits_diff(s);
898 if (s->chroma_y_shift) {
900 ff_mpeg12_mbPatTable[cbp][1],
901 ff_mpeg12_mbPatTable[cbp][0]);
904 ff_mpeg12_mbPatTable[cbp >> 2][1],
905 ff_mpeg12_mbPatTable[cbp >> 2][0]);
906 put_sbits(&s->pb, 2, cbp);
911 if (s->mv_type == MV_TYPE_16X16) {
912 if (cbp) { // With coded bloc pattern
914 if (s->mv_dir == MV_DIR_FORWARD)
915 put_mb_modes(s, 6, 3, 1, 0);
917 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
920 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
922 } else { // No coded bloc pattern
923 put_bits(&s->pb, 5 - s->mv_dir, 2);
924 if (!s->frame_pred_frame_dct)
925 put_bits(&s->pb, 2, 2); /* motion_type: frame */
926 s->qscale -= s->dquant;
928 s->misc_bits += get_bits_diff(s);
929 if (s->mv_dir & MV_DIR_FORWARD) {
930 mpeg1_encode_motion(s,
931 s->mv[0][0][0] - s->last_mv[0][0][0],
933 mpeg1_encode_motion(s,
934 s->mv[0][0][1] - s->last_mv[0][0][1],
936 s->last_mv[0][0][0] =
937 s->last_mv[0][1][0] = s->mv[0][0][0];
938 s->last_mv[0][0][1] =
939 s->last_mv[0][1][1] = s->mv[0][0][1];
942 if (s->mv_dir & MV_DIR_BACKWARD) {
943 mpeg1_encode_motion(s,
944 s->mv[1][0][0] - s->last_mv[1][0][0],
946 mpeg1_encode_motion(s,
947 s->mv[1][0][1] - s->last_mv[1][0][1],
949 s->last_mv[1][0][0] =
950 s->last_mv[1][1][0] = s->mv[1][0][0];
951 s->last_mv[1][0][1] =
952 s->last_mv[1][1][1] = s->mv[1][0][1];
956 av_assert2(s->mv_type == MV_TYPE_FIELD);
957 av_assert2(!s->frame_pred_frame_dct);
958 if (cbp) { // With coded bloc pattern
960 if (s->mv_dir == MV_DIR_FORWARD)
961 put_mb_modes(s, 6, 3, 1, 1);
963 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
966 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
968 } else { // No coded bloc pattern
969 put_bits(&s->pb, 5 - s->mv_dir, 2);
970 put_bits(&s->pb, 2, 1); /* motion_type: field */
971 s->qscale -= s->dquant;
973 s->misc_bits += get_bits_diff(s);
974 if (s->mv_dir & MV_DIR_FORWARD) {
975 for (i = 0; i < 2; i++) {
976 put_bits(&s->pb, 1, s->field_select[0][i]);
977 mpeg1_encode_motion(s,
978 s->mv[0][i][0] - s->last_mv[0][i][0],
980 mpeg1_encode_motion(s,
981 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
983 s->last_mv[0][i][0] = s->mv[0][i][0];
984 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
988 if (s->mv_dir & MV_DIR_BACKWARD) {
989 for (i = 0; i < 2; i++) {
990 put_bits(&s->pb, 1, s->field_select[1][i]);
991 mpeg1_encode_motion(s,
992 s->mv[1][i][0] - s->last_mv[1][i][0],
994 mpeg1_encode_motion(s,
995 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
997 s->last_mv[1][i][0] = s->mv[1][i][0];
998 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
1003 s->mv_bits += get_bits_diff(s);
1005 if (s->chroma_y_shift) {
1007 ff_mpeg12_mbPatTable[cbp][1],
1008 ff_mpeg12_mbPatTable[cbp][0]);
1011 ff_mpeg12_mbPatTable[cbp >> 2][1],
1012 ff_mpeg12_mbPatTable[cbp >> 2][0]);
1013 put_sbits(&s->pb, 2, cbp);
1017 for (i = 0; i < mb_block_count; i++)
1018 if (cbp & (1 << (mb_block_count - 1 - i)))
1019 mpeg1_encode_block(s, block[i], i);
1022 s->i_tex_bits += get_bits_diff(s);
1024 s->p_tex_bits += get_bits_diff(s);
1028 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1029 int motion_x, int motion_y)
1031 if (s->chroma_format == CHROMA_420)
1032 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1034 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1037 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1039 static int done = 0;
1041 ff_mpeg12_common_init(s);
1049 ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
1050 ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
1052 for (i = 0; i < 64; i++) {
1053 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1054 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1057 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1058 if (s->intra_vlc_format)
1059 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1061 /* build unified dc encoding tables */
1062 for (i = -255; i < 256; i++) {
1067 adiff = FFABS(diff);
1070 index = av_log2(2 * adiff);
1072 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1073 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1074 av_mod_uintp2(diff, index);
1075 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1077 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1078 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1079 av_mod_uintp2(diff, index);
1080 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1083 for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1084 for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1088 len = ff_mpeg12_mbMotionVectorTable[0][1];
1090 int val, bit_size, code;
1092 bit_size = f_code - 1;
1098 code = (val >> bit_size) + 1;
1100 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1103 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1107 mv_penalty[f_code][mv + MAX_DMV] = len;
1111 for (f_code = MAX_FCODE; f_code > 0; f_code--)
1112 for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1113 fcode_tab[mv + MAX_MV] = f_code;
1115 s->me.mv_penalty = mv_penalty;
1116 s->fcode_tab = fcode_tab;
1117 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1118 s->min_qcoeff = -255;
1119 s->max_qcoeff = 255;
1121 s->min_qcoeff = -2047;
1122 s->max_qcoeff = 2047;
1124 if (s->intra_vlc_format) {
1125 s->intra_ac_vlc_length =
1126 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1128 s->intra_ac_vlc_length =
1129 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1131 s->inter_ac_vlc_length =
1132 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1135 #define OFFSET(x) offsetof(MpegEncContext, x)
1136 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1137 #define COMMON_OPTS \
1138 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1139 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
1140 { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1141 OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1142 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1143 OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1144 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1145 OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1146 { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1147 OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1149 static const AVOption mpeg1_options[] = {
1155 static const AVOption mpeg2_options[] = {
1157 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1158 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1159 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1160 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1161 { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1162 { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1163 { "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" },
1164 { "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, "video_format" },
1165 { "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, "video_format" },
1166 { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, "video_format" },
1167 { "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, "video_format" },
1168 { "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, "video_format" },
1169 { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, "video_format" },
1170 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, "avctx.level"
1171 { LEVEL("high", 4) },
1172 { LEVEL("high1440", 6) },
1173 { LEVEL("main", 8) },
1174 { LEVEL("low", 10) },
1177 FF_MPEG2_PROFILE_OPTS
1181 #define mpeg12_class(x) \
1182 static const AVClass mpeg ## x ## _class = { \
1183 .class_name = "mpeg" # x "video encoder", \
1184 .item_name = av_default_item_name, \
1185 .option = mpeg ## x ## _options, \
1186 .version = LIBAVUTIL_VERSION_INT, \
1192 AVCodec ff_mpeg1video_encoder = {
1193 .name = "mpeg1video",
1194 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1195 .type = AVMEDIA_TYPE_VIDEO,
1196 .id = AV_CODEC_ID_MPEG1VIDEO,
1197 .priv_data_size = sizeof(MpegEncContext),
1198 .init = encode_init,
1199 .encode2 = ff_mpv_encode_picture,
1200 .close = ff_mpv_encode_end,
1201 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1202 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1204 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1205 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1206 .priv_class = &mpeg1_class,
1209 AVCodec ff_mpeg2video_encoder = {
1210 .name = "mpeg2video",
1211 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1212 .type = AVMEDIA_TYPE_VIDEO,
1213 .id = AV_CODEC_ID_MPEG2VIDEO,
1214 .priv_data_size = sizeof(MpegEncContext),
1215 .init = encode_init,
1216 .encode2 = ff_mpv_encode_picture,
1217 .close = ff_mpv_encode_end,
1218 .supported_framerates = ff_mpeg2_frame_rate_tab,
1219 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1222 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1223 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1224 .priv_class = &mpeg2_class,