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/thread.h"
35 #include "libavutil/timecode.h"
36 #include "libavutil/stereo3d.h"
39 #include "bytestream.h"
42 #include "mpeg12data.h"
43 #include "mpegutils.h"
44 #include "mpegvideo.h"
47 static const uint8_t svcd_scan_offset_placeholder[] = {
48 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
49 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
52 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
53 static uint8_t fcode_tab[MAX_MV * 2 + 1];
55 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
56 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
58 /* simple include everything table for dc, first byte is bits
59 * number next 3 are code */
60 static uint32_t mpeg1_lum_dc_uni[512];
61 static uint32_t mpeg1_chr_dc_uni[512];
63 static uint8_t mpeg1_index_run[2][64];
64 static int8_t mpeg1_max_level[2][64];
66 #define A53_MAX_CC_COUNT 0x1f
68 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
72 for (i = 0; i < 128; i++) {
77 for (run = 0; run < 64; run++) {
79 int alevel = FFABS(level);
81 if (alevel > rl->max_level[0][run])
82 code = 111; /* rl->n */
84 code = rl->index_run[0][run] + alevel - 1;
86 if (code < 111) { /* rl->n */
87 /* length of VLC and sign */
88 len = rl->table_vlc[code][1] + 1;
90 len = rl->table_vlc[111 /* rl->n */][1] + 6;
98 uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
103 static int find_frame_rate_index(MpegEncContext *s)
106 AVRational bestq = (AVRational) {0, 0};
108 AVRational target = av_inv_q(s->avctx->time_base);
110 for (i = 1; i < 14; i++) {
111 if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
115 for (ext.num=1; ext.num <= 4; ext.num++) {
116 for (ext.den=1; ext.den <= 32; ext.den++) {
117 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
119 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
121 if (av_gcd(ext.den, ext.num) != 1)
125 || av_nearer_q(target, bestq, q) < 0
126 || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
128 s->frame_rate_index = i;
129 s->mpeg2_frame_rate_ext.num = ext.num;
130 s->mpeg2_frame_rate_ext.den = ext.den;
136 if (av_cmp_q(target, bestq))
142 static av_cold int encode_init(AVCodecContext *avctx)
145 MpegEncContext *s = avctx->priv_data;
147 if ((ret = ff_mpv_encode_init(avctx)) < 0)
150 if (find_frame_rate_index(s) < 0) {
151 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
152 av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
153 avctx->time_base.den, avctx->time_base.num);
154 return AVERROR(EINVAL);
156 av_log(avctx, AV_LOG_INFO,
157 "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
158 avctx->time_base.den, avctx->time_base.num);
162 if (avctx->profile == FF_PROFILE_UNKNOWN) {
163 if (avctx->level != FF_LEVEL_UNKNOWN) {
164 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
165 return AVERROR(EINVAL);
168 avctx->profile = s->chroma_format == CHROMA_420 ? FF_PROFILE_MPEG2_MAIN : FF_PROFILE_MPEG2_422;
171 if (avctx->level == FF_LEVEL_UNKNOWN) {
172 if (avctx->profile == FF_PROFILE_MPEG2_422) { /* 4:2:2 */
173 if (avctx->width <= 720 && avctx->height <= 608)
174 avctx->level = 5; /* Main */
176 avctx->level = 2; /* High */
178 if (avctx->profile != FF_PROFILE_MPEG2_HIGH && s->chroma_format != CHROMA_420) {
179 av_log(avctx, AV_LOG_ERROR,
180 "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
181 return AVERROR(EINVAL);
183 if (avctx->width <= 720 && avctx->height <= 576)
184 avctx->level = 8; /* Main */
185 else if (avctx->width <= 1440)
186 avctx->level = 6; /* High 1440 */
188 avctx->level = 4; /* High */
192 if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
193 av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
194 return AVERROR(EINVAL);
197 if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
198 if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
199 av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
200 "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
201 return AVERROR(EINVAL);
205 s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
206 if (s->drop_frame_timecode)
207 s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
208 if (s->drop_frame_timecode && s->frame_rate_index != 4) {
209 av_log(avctx, AV_LOG_ERROR,
210 "Drop frame time code only allowed with 1001/30000 fps\n");
211 return AVERROR(EINVAL);
214 #if FF_API_PRIVATE_OPT
215 FF_DISABLE_DEPRECATION_WARNINGS
216 if (avctx->timecode_frame_start)
217 s->timecode_frame_start = avctx->timecode_frame_start;
218 FF_ENABLE_DEPRECATION_WARNINGS
222 AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
223 int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
226 s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
227 s->timecode_frame_start = s->tc.start;
229 s->timecode_frame_start = 0; // default is -1
235 static void put_header(MpegEncContext *s, int header)
237 align_put_bits(&s->pb);
238 put_bits(&s->pb, 16, header >> 16);
239 put_sbits(&s->pb, 16, header);
242 /* put sequence header if needed */
243 static void mpeg1_encode_sequence_header(MpegEncContext *s)
245 unsigned int vbv_buffer_size, fps, v;
246 int i, constraint_parameter_flag;
248 int64_t best_aspect_error = INT64_MAX;
249 AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
251 if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
252 aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
254 if (s->current_picture.f->key_frame) {
255 AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
257 /* MPEG-1 header repeated every GOP */
258 put_header(s, SEQ_START_CODE);
260 put_sbits(&s->pb, 12, s->width & 0xFFF);
261 put_sbits(&s->pb, 12, s->height & 0xFFF);
263 for (i = 1; i < 15; i++) {
264 int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
265 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
266 error -= (1LL<<32) / ff_mpeg1_aspect[i];
268 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
270 error = FFABS(error);
272 if (error - 2 <= best_aspect_error) {
273 best_aspect_error = error;
274 s->aspect_ratio_info = i;
278 put_bits(&s->pb, 4, s->aspect_ratio_info);
279 put_bits(&s->pb, 4, s->frame_rate_index);
281 if (s->avctx->rc_max_rate) {
282 v = (s->avctx->rc_max_rate + 399) / 400;
283 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
289 if (s->avctx->rc_buffer_size)
290 vbv_buffer_size = s->avctx->rc_buffer_size;
292 /* VBV calculation: Scaled so that a VCD has the proper
293 * VBV size of 40 kilobytes */
294 vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
295 vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
297 put_sbits(&s->pb, 18, v);
298 put_bits(&s->pb, 1, 1); // marker
299 put_sbits(&s->pb, 10, vbv_buffer_size);
301 constraint_parameter_flag =
304 s->mb_width * s->mb_height <= 396 &&
305 s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
306 framerate.num <= framerate.den * 30 &&
307 s->avctx->me_range &&
308 s->avctx->me_range < 128 &&
309 vbv_buffer_size <= 20 &&
310 v <= 1856000 / 400 &&
311 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
313 put_bits(&s->pb, 1, constraint_parameter_flag);
315 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
316 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
318 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
319 AVFrameSideData *side_data;
320 int width = s->width;
321 int height = s->height;
322 int use_seq_disp_ext;
324 put_header(s, EXT_START_CODE);
325 put_bits(&s->pb, 4, 1); // seq ext
327 put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
329 put_bits(&s->pb, 3, s->avctx->profile); // profile
330 put_bits(&s->pb, 4, s->avctx->level); // level
332 put_bits(&s->pb, 1, s->progressive_sequence);
333 put_bits(&s->pb, 2, s->chroma_format);
334 put_bits(&s->pb, 2, s->width >> 12);
335 put_bits(&s->pb, 2, s->height >> 12);
336 put_bits(&s->pb, 12, v >> 18); // bitrate ext
337 put_bits(&s->pb, 1, 1); // marker
338 put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
339 put_bits(&s->pb, 1, s->low_delay);
340 put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
341 put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
343 side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
345 AVPanScan *pan_scan = (AVPanScan *)side_data->data;
346 if (pan_scan->width && pan_scan->height) {
347 width = pan_scan->width >> 4;
348 height = pan_scan->height >> 4;
352 use_seq_disp_ext = (width != s->width ||
353 height != s->height ||
354 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
355 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
356 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
357 s->video_format != VIDEO_FORMAT_UNSPECIFIED);
359 if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
360 put_header(s, EXT_START_CODE);
361 put_bits(&s->pb, 4, 2); // sequence display extension
362 put_bits(&s->pb, 3, s->video_format); // video_format
363 put_bits(&s->pb, 1, 1); // colour_description
364 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
365 put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
366 put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
367 put_bits(&s->pb, 14, width); // display_horizontal_size
368 put_bits(&s->pb, 1, 1); // marker_bit
369 put_bits(&s->pb, 14, height); // display_vertical_size
370 put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
374 put_header(s, GOP_START_CODE);
375 put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
376 /* time code: we must convert from the real frame rate to a
377 * fake MPEG frame rate in case of low frame rate */
378 fps = (framerate.num + framerate.den / 2) / framerate.den;
379 time_code = s->current_picture_ptr->f->coded_picture_number +
380 s->timecode_frame_start;
382 s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
384 av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
385 if (s->drop_frame_timecode)
386 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
388 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
389 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
390 put_bits(&s->pb, 1, 1);
391 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
392 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
393 put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
394 put_bits(&s->pb, 1, 0); // broken link
398 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
401 put_bits(&s->pb, 11, 0x008);
404 put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
405 ff_mpeg12_mbAddrIncrTable[run][0]);
408 static av_always_inline void put_qscale(MpegEncContext *s)
410 put_bits(&s->pb, 5, s->qscale);
413 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
415 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
416 put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
417 /* slice_vertical_position_extension */
418 put_bits(&s->pb, 3, s->mb_y >> 7);
420 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
423 /* slice extra information */
424 put_bits(&s->pb, 1, 0);
427 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
429 AVFrameSideData *side_data;
430 mpeg1_encode_sequence_header(s);
432 /* MPEG-1 picture header */
433 put_header(s, PICTURE_START_CODE);
434 /* temporal reference */
436 // RAL: s->picture_number instead of s->fake_picture_number
438 (s->picture_number - s->gop_picture_number) & 0x3ff);
439 put_bits(&s->pb, 3, s->pict_type);
441 s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
442 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
444 // RAL: Forward f_code also needed for B-frames
445 if (s->pict_type == AV_PICTURE_TYPE_P ||
446 s->pict_type == AV_PICTURE_TYPE_B) {
447 put_bits(&s->pb, 1, 0); /* half pel coordinates */
448 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
449 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
451 put_bits(&s->pb, 3, 7); /* forward_f_code */
454 // RAL: Backward f_code necessary for B-frames
455 if (s->pict_type == AV_PICTURE_TYPE_B) {
456 put_bits(&s->pb, 1, 0); /* half pel coordinates */
457 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
458 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
460 put_bits(&s->pb, 3, 7); /* backward_f_code */
463 put_bits(&s->pb, 1, 0); /* extra bit picture */
465 s->frame_pred_frame_dct = 1;
466 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
467 put_header(s, EXT_START_CODE);
468 put_bits(&s->pb, 4, 8); /* pic ext */
469 if (s->pict_type == AV_PICTURE_TYPE_P ||
470 s->pict_type == AV_PICTURE_TYPE_B) {
471 put_bits(&s->pb, 4, s->f_code);
472 put_bits(&s->pb, 4, s->f_code);
474 put_bits(&s->pb, 8, 255);
476 if (s->pict_type == AV_PICTURE_TYPE_B) {
477 put_bits(&s->pb, 4, s->b_code);
478 put_bits(&s->pb, 4, s->b_code);
480 put_bits(&s->pb, 8, 255);
482 put_bits(&s->pb, 2, s->intra_dc_precision);
484 av_assert0(s->picture_structure == PICT_FRAME);
485 put_bits(&s->pb, 2, s->picture_structure);
486 if (s->progressive_sequence)
487 put_bits(&s->pb, 1, 0); /* no repeat */
489 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
490 /* XXX: optimize the generation of this flag with entropy measures */
491 s->frame_pred_frame_dct = s->progressive_sequence;
493 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
494 put_bits(&s->pb, 1, s->concealment_motion_vectors);
495 put_bits(&s->pb, 1, s->q_scale_type);
496 put_bits(&s->pb, 1, s->intra_vlc_format);
497 put_bits(&s->pb, 1, s->alternate_scan);
498 put_bits(&s->pb, 1, s->repeat_first_field);
499 s->progressive_frame = s->progressive_sequence;
500 /* chroma_420_type */
501 put_bits(&s->pb, 1, s->chroma_format ==
502 CHROMA_420 ? s->progressive_frame : 0);
503 put_bits(&s->pb, 1, s->progressive_frame);
504 put_bits(&s->pb, 1, 0); /* composite_display_flag */
506 if (s->scan_offset) {
509 put_header(s, USER_START_CODE);
510 for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
511 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
513 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
514 AV_FRAME_DATA_STEREO3D);
516 AVStereo3D *stereo = (AVStereo3D *)side_data->data;
519 switch (stereo->type) {
520 case AV_STEREO3D_SIDEBYSIDE:
523 case AV_STEREO3D_TOPBOTTOM:
529 case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
538 put_header(s, USER_START_CODE);
539 put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
540 put_bits(&s->pb, 8, 'P');
541 put_bits(&s->pb, 8, '3');
542 put_bits(&s->pb, 8, 'D');
543 put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
545 put_bits(&s->pb, 1, 1); // reserved_bit
546 put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
547 put_bits(&s->pb, 8, 0x04); // reserved_data[0]
548 put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
552 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->a53_cc) {
553 side_data = av_frame_get_side_data(s->current_picture_ptr->f,
554 AV_FRAME_DATA_A53_CC);
556 if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
559 put_header (s, USER_START_CODE);
561 put_bits(&s->pb, 8, 'G'); // user_identifier
562 put_bits(&s->pb, 8, 'A');
563 put_bits(&s->pb, 8, '9');
564 put_bits(&s->pb, 8, '4');
565 put_bits(&s->pb, 8, 3); // user_data_type_code
567 (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
568 put_bits(&s->pb, 8, 0xff); // em_data
570 for (i = 0; i < side_data->size; i++)
571 put_bits(&s->pb, 8, side_data->data[i]);
573 put_bits(&s->pb, 8, 0xff); // marker_bits
575 av_log(s->avctx, AV_LOG_WARNING,
576 "Warning Closed Caption size (%d) can not exceed 93 bytes "
577 "and must be a multiple of 3\n", side_data->size);
583 ff_mpeg1_encode_slice_header(s);
586 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
587 int has_mv, int field_motion)
589 put_bits(&s->pb, n, bits);
590 if (!s->frame_pred_frame_dct) {
592 /* motion_type: frame/field */
593 put_bits(&s->pb, 2, 2 - field_motion);
594 put_bits(&s->pb, 1, s->interlaced_dct);
598 // RAL: Parameter added: f_or_b_code
599 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
604 ff_mpeg12_mbMotionVectorTable[0][1],
605 ff_mpeg12_mbMotionVectorTable[0][0]);
607 int code, sign, bits;
608 int bit_size = f_or_b_code - 1;
609 int range = 1 << bit_size;
610 /* modulo encoding */
611 val = sign_extend(val, 5 + bit_size);
615 code = (val >> bit_size) + 1;
616 bits = val & (range - 1);
621 code = (val >> bit_size) + 1;
622 bits = val & (range - 1);
626 av_assert2(code > 0 && code <= 16);
629 ff_mpeg12_mbMotionVectorTable[code][1],
630 ff_mpeg12_mbMotionVectorTable[code][0]);
632 put_bits(&s->pb, 1, sign);
634 put_bits(&s->pb, bit_size, bits);
638 static inline void encode_dc(MpegEncContext *s, int diff, int component)
640 unsigned int diff_u = diff + 255;
645 index = av_log2_16bit(-2 * diff);
648 index = av_log2_16bit(2 * diff);
652 ff_mpeg12_vlc_dc_lum_bits[index] + index,
653 (ff_mpeg12_vlc_dc_lum_code[index] << index) +
654 av_mod_uintp2(diff, index));
657 ff_mpeg12_vlc_dc_chroma_bits[index] + index,
658 (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
659 av_mod_uintp2(diff, index));
663 mpeg1_lum_dc_uni[diff + 255] & 0xFF,
664 mpeg1_lum_dc_uni[diff + 255] >> 8);
667 mpeg1_chr_dc_uni[diff + 255] & 0xFF,
668 mpeg1_chr_dc_uni[diff + 255] >> 8);
672 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
674 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
676 const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
678 last_index = s->block_last_index[n];
682 component = (n <= 3 ? 0 : (n & 1) + 1);
683 dc = block[0]; /* overflow is impossible */
684 diff = dc - s->last_dc[component];
685 encode_dc(s, diff, component);
686 s->last_dc[component] = dc;
688 if (s->intra_vlc_format)
689 table_vlc = ff_rl_mpeg2.table_vlc;
691 /* encode the first coefficient: needs to be done here because
692 * it is handled slightly differently */
694 if (abs(level) == 1) {
695 code = ((uint32_t)level >> 31); /* the sign bit */
696 put_bits(&s->pb, 2, code | 0x02);
705 /* now quantify & encode AC coefs */
706 last_non_zero = i - 1;
708 for (; i <= last_index; i++) {
709 j = s->intra_scantable.permutated[i];
713 /* encode using VLC */
715 run = i - last_non_zero - 1;
718 MASK_ABS(sign, alevel);
721 if (alevel <= mpeg1_max_level[0][run]) {
722 code = mpeg1_index_run[0][run] + alevel - 1;
723 /* store the VLC & sign at once */
724 put_bits(&s->pb, table_vlc[code][1] + 1,
725 (table_vlc[code][0] << 1) + sign);
727 /* escape seems to be pretty rare <5% so I do not optimize it */
728 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
729 /* escape: only clip in this case */
730 put_bits(&s->pb, 6, run);
731 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
733 put_sbits(&s->pb, 8, level);
736 put_bits(&s->pb, 16, 0x8001 + level + 255);
738 put_sbits(&s->pb, 16, level);
741 put_sbits(&s->pb, 12, level);
748 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
751 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
752 int16_t block[8][64],
753 int motion_x, int motion_y,
757 const int mb_x = s->mb_x;
758 const int mb_y = s->mb_y;
759 const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
763 for (i = 0; i < mb_block_count; i++)
764 if (s->block_last_index[i] >= 0)
765 cbp |= 1 << (mb_block_count - 1 - i);
767 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
768 (mb_x != s->mb_width - 1 ||
769 (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
770 ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
771 (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
772 (((s->mv_dir & MV_DIR_FORWARD)
773 ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
774 (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
775 ((s->mv_dir & MV_DIR_BACKWARD)
776 ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
777 (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
779 s->qscale -= s->dquant;
783 if (s->pict_type == AV_PICTURE_TYPE_P) {
784 s->last_mv[0][0][0] =
785 s->last_mv[0][0][1] =
786 s->last_mv[0][1][0] =
787 s->last_mv[0][1][1] = 0;
791 av_assert0(s->mb_skip_run == 0);
792 encode_mb_skip_run(s, s->mb_x);
794 encode_mb_skip_run(s, s->mb_skip_run);
797 if (s->pict_type == AV_PICTURE_TYPE_I) {
798 if (s->dquant && cbp) {
799 /* macroblock_type: macroblock_quant = 1 */
800 put_mb_modes(s, 2, 1, 0, 0);
803 /* macroblock_type: macroblock_quant = 0 */
804 put_mb_modes(s, 1, 1, 0, 0);
805 s->qscale -= s->dquant;
807 s->misc_bits += get_bits_diff(s);
809 } else if (s->mb_intra) {
810 if (s->dquant && cbp) {
811 put_mb_modes(s, 6, 0x01, 0, 0);
814 put_mb_modes(s, 5, 0x03, 0, 0);
815 s->qscale -= s->dquant;
817 s->misc_bits += get_bits_diff(s);
819 memset(s->last_mv, 0, sizeof(s->last_mv));
820 } else if (s->pict_type == AV_PICTURE_TYPE_P) {
821 if (s->mv_type == MV_TYPE_16X16) {
823 if ((motion_x | motion_y) == 0) {
825 /* macroblock_pattern & quant */
826 put_mb_modes(s, 5, 1, 0, 0);
829 /* macroblock_pattern only */
830 put_mb_modes(s, 2, 1, 0, 0);
832 s->misc_bits += get_bits_diff(s);
835 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
838 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
840 s->misc_bits += get_bits_diff(s);
841 // RAL: f_code parameter added
842 mpeg1_encode_motion(s,
843 motion_x - s->last_mv[0][0][0],
845 // RAL: f_code parameter added
846 mpeg1_encode_motion(s,
847 motion_y - s->last_mv[0][0][1],
849 s->mv_bits += get_bits_diff(s);
852 put_bits(&s->pb, 3, 1); /* motion only */
853 if (!s->frame_pred_frame_dct)
854 put_bits(&s->pb, 2, 2); /* motion_type: frame */
855 s->misc_bits += get_bits_diff(s);
856 // RAL: f_code parameter added
857 mpeg1_encode_motion(s,
858 motion_x - s->last_mv[0][0][0],
860 // RAL: f_code parameter added
861 mpeg1_encode_motion(s,
862 motion_y - s->last_mv[0][0][1],
864 s->qscale -= s->dquant;
865 s->mv_bits += get_bits_diff(s);
867 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
868 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
870 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
874 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
877 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
880 put_bits(&s->pb, 3, 1); /* motion only */
881 put_bits(&s->pb, 2, 1); /* motion_type: field */
882 s->qscale -= s->dquant;
884 s->misc_bits += get_bits_diff(s);
885 for (i = 0; i < 2; i++) {
886 put_bits(&s->pb, 1, s->field_select[0][i]);
887 mpeg1_encode_motion(s,
888 s->mv[0][i][0] - s->last_mv[0][i][0],
890 mpeg1_encode_motion(s,
891 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
893 s->last_mv[0][i][0] = s->mv[0][i][0];
894 s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
896 s->mv_bits += get_bits_diff(s);
899 if (s->chroma_y_shift) {
901 ff_mpeg12_mbPatTable[cbp][1],
902 ff_mpeg12_mbPatTable[cbp][0]);
905 ff_mpeg12_mbPatTable[cbp >> 2][1],
906 ff_mpeg12_mbPatTable[cbp >> 2][0]);
907 put_sbits(&s->pb, 2, cbp);
912 if (s->mv_type == MV_TYPE_16X16) {
913 if (cbp) { // With coded bloc pattern
915 if (s->mv_dir == MV_DIR_FORWARD)
916 put_mb_modes(s, 6, 3, 1, 0);
918 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
921 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
923 } else { // No coded bloc pattern
924 put_bits(&s->pb, 5 - s->mv_dir, 2);
925 if (!s->frame_pred_frame_dct)
926 put_bits(&s->pb, 2, 2); /* motion_type: frame */
927 s->qscale -= s->dquant;
929 s->misc_bits += get_bits_diff(s);
930 if (s->mv_dir & MV_DIR_FORWARD) {
931 mpeg1_encode_motion(s,
932 s->mv[0][0][0] - s->last_mv[0][0][0],
934 mpeg1_encode_motion(s,
935 s->mv[0][0][1] - s->last_mv[0][0][1],
937 s->last_mv[0][0][0] =
938 s->last_mv[0][1][0] = s->mv[0][0][0];
939 s->last_mv[0][0][1] =
940 s->last_mv[0][1][1] = s->mv[0][0][1];
943 if (s->mv_dir & MV_DIR_BACKWARD) {
944 mpeg1_encode_motion(s,
945 s->mv[1][0][0] - s->last_mv[1][0][0],
947 mpeg1_encode_motion(s,
948 s->mv[1][0][1] - s->last_mv[1][0][1],
950 s->last_mv[1][0][0] =
951 s->last_mv[1][1][0] = s->mv[1][0][0];
952 s->last_mv[1][0][1] =
953 s->last_mv[1][1][1] = s->mv[1][0][1];
957 av_assert2(s->mv_type == MV_TYPE_FIELD);
958 av_assert2(!s->frame_pred_frame_dct);
959 if (cbp) { // With coded bloc pattern
961 if (s->mv_dir == MV_DIR_FORWARD)
962 put_mb_modes(s, 6, 3, 1, 1);
964 put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
967 put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
969 } else { // No coded bloc pattern
970 put_bits(&s->pb, 5 - s->mv_dir, 2);
971 put_bits(&s->pb, 2, 1); /* motion_type: field */
972 s->qscale -= s->dquant;
974 s->misc_bits += get_bits_diff(s);
975 if (s->mv_dir & MV_DIR_FORWARD) {
976 for (i = 0; i < 2; i++) {
977 put_bits(&s->pb, 1, s->field_select[0][i]);
978 mpeg1_encode_motion(s,
979 s->mv[0][i][0] - s->last_mv[0][i][0],
981 mpeg1_encode_motion(s,
982 s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
984 s->last_mv[0][i][0] = s->mv[0][i][0];
985 s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
989 if (s->mv_dir & MV_DIR_BACKWARD) {
990 for (i = 0; i < 2; i++) {
991 put_bits(&s->pb, 1, s->field_select[1][i]);
992 mpeg1_encode_motion(s,
993 s->mv[1][i][0] - s->last_mv[1][i][0],
995 mpeg1_encode_motion(s,
996 s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
998 s->last_mv[1][i][0] = s->mv[1][i][0];
999 s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
1004 s->mv_bits += get_bits_diff(s);
1006 if (s->chroma_y_shift) {
1008 ff_mpeg12_mbPatTable[cbp][1],
1009 ff_mpeg12_mbPatTable[cbp][0]);
1012 ff_mpeg12_mbPatTable[cbp >> 2][1],
1013 ff_mpeg12_mbPatTable[cbp >> 2][0]);
1014 put_sbits(&s->pb, 2, cbp);
1018 for (i = 0; i < mb_block_count; i++)
1019 if (cbp & (1 << (mb_block_count - 1 - i)))
1020 mpeg1_encode_block(s, block[i], i);
1023 s->i_tex_bits += get_bits_diff(s);
1025 s->p_tex_bits += get_bits_diff(s);
1029 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1030 int motion_x, int motion_y)
1032 if (s->chroma_format == CHROMA_420)
1033 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1035 mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1038 static av_cold void mpeg12_encode_init_static(void)
1040 ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
1041 ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
1043 for (int i = 0; i < 64; i++) {
1044 mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1045 mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1048 init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1049 init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1051 /* build unified dc encoding tables */
1052 for (int i = -255; i < 256; i++) {
1057 adiff = FFABS(diff);
1060 index = av_log2(2 * adiff);
1062 bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1063 code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1064 av_mod_uintp2(diff, index);
1065 mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1067 bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1068 code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1069 av_mod_uintp2(diff, index);
1070 mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1073 for (int f_code = 1; f_code <= MAX_FCODE; f_code++)
1074 for (int mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1078 len = ff_mpeg12_mbMotionVectorTable[0][1];
1080 int val, bit_size, code;
1082 bit_size = f_code - 1;
1088 code = (val >> bit_size) + 1;
1090 len = ff_mpeg12_mbMotionVectorTable[code][1] +
1093 len = ff_mpeg12_mbMotionVectorTable[16][1] +
1097 mv_penalty[f_code][mv + MAX_DMV] = len;
1101 for (int f_code = MAX_FCODE; f_code > 0; f_code--)
1102 for (int mv = -(8 << f_code); mv < (8 << f_code); mv++)
1103 fcode_tab[mv + MAX_MV] = f_code;
1106 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1108 static AVOnce init_static_once = AV_ONCE_INIT;
1110 ff_mpeg12_common_init(s);
1112 s->me.mv_penalty = mv_penalty;
1113 s->fcode_tab = fcode_tab;
1114 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1115 s->min_qcoeff = -255;
1116 s->max_qcoeff = 255;
1118 s->min_qcoeff = -2047;
1119 s->max_qcoeff = 2047;
1121 if (s->intra_vlc_format) {
1122 s->intra_ac_vlc_length =
1123 s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1125 s->intra_ac_vlc_length =
1126 s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1128 s->inter_ac_vlc_length =
1129 s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1131 ff_thread_once(&init_static_once, mpeg12_encode_init_static);
1134 #define OFFSET(x) offsetof(MpegEncContext, x)
1135 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1136 #define COMMON_OPTS \
1137 { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1138 OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
1139 { "drop_frame_timecode", "Timecode is in drop frame format.", \
1140 OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1141 { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1142 OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1143 { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1144 OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1146 static const AVOption mpeg1_options[] = {
1152 static const AVOption mpeg2_options[] = {
1154 { "intra_vlc", "Use MPEG-2 intra VLC table.",
1155 OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1156 { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1157 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1158 { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1159 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1160 { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1161 { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1162 { "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" },
1163 { "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, "video_format" },
1164 { "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, "video_format" },
1165 { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, "video_format" },
1166 { "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, "video_format" },
1167 { "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, "video_format" },
1168 { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, "video_format" },
1169 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, "avctx.level"
1170 { LEVEL("high", 4) },
1171 { LEVEL("high1440", 6) },
1172 { LEVEL("main", 8) },
1173 { LEVEL("low", 10) },
1176 FF_MPEG2_PROFILE_OPTS
1180 #define mpeg12_class(x) \
1181 static const AVClass mpeg ## x ## _class = { \
1182 .class_name = "mpeg" # x "video encoder", \
1183 .item_name = av_default_item_name, \
1184 .option = mpeg ## x ## _options, \
1185 .version = LIBAVUTIL_VERSION_INT, \
1191 AVCodec ff_mpeg1video_encoder = {
1192 .name = "mpeg1video",
1193 .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1194 .type = AVMEDIA_TYPE_VIDEO,
1195 .id = AV_CODEC_ID_MPEG1VIDEO,
1196 .priv_data_size = sizeof(MpegEncContext),
1197 .init = encode_init,
1198 .encode2 = ff_mpv_encode_picture,
1199 .close = ff_mpv_encode_end,
1200 .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1201 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1203 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1204 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1205 .priv_class = &mpeg1_class,
1208 AVCodec ff_mpeg2video_encoder = {
1209 .name = "mpeg2video",
1210 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1211 .type = AVMEDIA_TYPE_VIDEO,
1212 .id = AV_CODEC_ID_MPEG2VIDEO,
1213 .priv_data_size = sizeof(MpegEncContext),
1214 .init = encode_init,
1215 .encode2 = ff_mpv_encode_picture,
1216 .close = ff_mpv_encode_end,
1217 .supported_framerates = ff_mpeg2_frame_rate_tab,
1218 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1221 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1222 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1223 .priv_class = &mpeg2_class,