git.sesse.net Git - ffmpeg/blob - libavcodec/mpeg12enc.c

   1 /*
   2  * MPEG-1/2 encoder
   3  * Copyright (c) 2000,2001 Fabrice Bellard
   4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   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.
  12  *
  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.
  17  *
  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
  21  */
  22
  23 /**
  24  * @file
  25  * MPEG-1/2 encoder
  26  */
  27
  28 #include <stdint.h>
  29
  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"
  37
  38 #include "avcodec.h"
  39 #include "bytestream.h"
  40 #include "mathops.h"
  41 #include "mpeg12.h"
  42 #include "mpeg12data.h"
  43 #include "mpegutils.h"
  44 #include "mpegvideo.h"
  45 #include "profiles.h"
  46
  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,
  50 };
  51
  52 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
  53 static uint8_t fcode_tab[MAX_MV * 2 + 1];
  54
  55 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
  56 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
  57
  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];
  62
  63 static uint8_t mpeg1_index_run[2][64];
  64 static int8_t  mpeg1_max_level[2][64];
  65
  66 #define A53_MAX_CC_COUNT 0x1f
  67
  68 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
  69 {
  70     int i;
  71
  72     for (i = 0; i < 128; i++) {
  73         int level = i - 64;
  74         int run;
  75         if (!level)
  76             continue;
  77         for (run = 0; run < 64; run++) {
  78             int len, code;
  79             int alevel = FFABS(level);
  80
  81             if (alevel > rl->max_level[0][run])
  82                 code = 111;                         /* rl->n */
  83             else
  84                 code = rl->index_run[0][run] + alevel - 1;
  85
  86             if (code < 111) {                       /* rl->n */
  87                 /* length of VLC and sign */
  88                 len = rl->table_vlc[code][1] + 1;
  89             } else {
  90                 len = rl->table_vlc[111 /* rl->n */][1] + 6;
  91
  92                 if (alevel < 128)
  93                     len += 8;
  94                 else
  95                     len += 16;
  96             }
  97
  98             uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
  99         }
 100     }
 101 }
 102
 103 static int find_frame_rate_index(MpegEncContext *s)
 104 {
 105     int i;
 106     AVRational bestq = (AVRational) {0, 0};
 107     AVRational ext;
 108     AVRational target = av_inv_q(s->avctx->time_base);
 109
 110     for (i = 1; i < 14; i++) {
 111         if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
 112             i >= 9)
 113             break;
 114
 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]);
 118
 119                 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
 120                     continue;
 121                 if (av_gcd(ext.den, ext.num) != 1)
 122                     continue;
 123
 124                 if (    bestq.num==0
 125                     || av_nearer_q(target, bestq, q) < 0
 126                     || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
 127                     bestq               = q;
 128                     s->frame_rate_index = i;
 129                     s->mpeg2_frame_rate_ext.num = ext.num;
 130                     s->mpeg2_frame_rate_ext.den = ext.den;
 131                 }
 132             }
 133         }
 134     }
 135
 136     if (av_cmp_q(target, bestq))
 137         return -1;
 138     else
 139         return 0;
 140 }
 141
 142 static av_cold int encode_init(AVCodecContext *avctx)
 143 {
 144     int ret;
 145     MpegEncContext *s = avctx->priv_data;
 146
 147     if ((ret = ff_mpv_encode_init(avctx)) < 0)
 148         return ret;
 149
 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);
 155         } else {
 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);
 159         }
 160     }
 161
 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);
 166         }
 167         /* Main or 4:2:2 */
 168         avctx->profile = s->chroma_format == CHROMA_420 ? FF_PROFILE_MPEG2_MAIN : FF_PROFILE_MPEG2_422;
 169     }
 170
 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 */
 175             else
 176                 avctx->level = 2;                   /* High */
 177         } else {
 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);
 182             }
 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 */
 187             else
 188                 avctx->level = 4;                   /* High */
 189         }
 190     }
 191
 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);
 195     }
 196
 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);
 202         }
 203     }
 204
 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);
 212     }
 213
 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
 219 #endif
 220
 221     if (s->tc_opt_str) {
 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);
 224         if (ret < 0)
 225             return ret;
 226         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
 227         s->timecode_frame_start = s->tc.start;
 228     } else {
 229         s->timecode_frame_start = 0; // default is -1
 230     }
 231
 232     return 0;
 233 }
 234
 235 static void put_header(MpegEncContext *s, int header)
 236 {
 237     align_put_bits(&s->pb);
 238     put_bits(&s->pb, 16, header >> 16);
 239     put_sbits(&s->pb, 16, header);
 240 }
 241
 242 /* put sequence header if needed */
 243 static void mpeg1_encode_sequence_header(MpegEncContext *s)
 244 {
 245     unsigned int vbv_buffer_size, fps, v;
 246     int i, constraint_parameter_flag;
 247     uint64_t time_code;
 248     int64_t best_aspect_error = INT64_MAX;
 249     AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
 250
 251     if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
 252         aspect_ratio = (AVRational){1,1};             // pixel aspect 1.1 (VGA)
 253
 254     if (s->current_picture.f->key_frame) {
 255         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 256
 257         /* MPEG-1 header repeated every GOP */
 258         put_header(s, SEQ_START_CODE);
 259
 260         put_sbits(&s->pb, 12, s->width  & 0xFFF);
 261         put_sbits(&s->pb, 12, s->height & 0xFFF);
 262
 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];
 267             else
 268                 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
 269
 270             error = FFABS(error);
 271
 272             if (error - 2 <= best_aspect_error) {
 273                 best_aspect_error    = error;
 274                 s->aspect_ratio_info = i;
 275             }
 276         }
 277
 278         put_bits(&s->pb, 4, s->aspect_ratio_info);
 279         put_bits(&s->pb, 4, s->frame_rate_index);
 280
 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)
 284                 v = 0x3ffff;
 285         } else {
 286             v = 0x3FFFF;
 287         }
 288
 289         if (s->avctx->rc_buffer_size)
 290             vbv_buffer_size = s->avctx->rc_buffer_size;
 291         else
 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;
 296
 297         put_sbits(&s->pb, 18, v);
 298         put_bits(&s->pb, 1, 1);         // marker
 299         put_sbits(&s->pb, 10, vbv_buffer_size);
 300
 301         constraint_parameter_flag =
 302             s->width  <= 768                                    &&
 303             s->height <= 576                                    &&
 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;
 312
 313         put_bits(&s->pb, 1, constraint_parameter_flag);
 314
 315         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
 316         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
 317
 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;
 323
 324             put_header(s, EXT_START_CODE);
 325             put_bits(&s->pb, 4, 1);                 // seq ext
 326
 327             put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
 328
 329             put_bits(&s->pb, 3, s->avctx->profile); // profile
 330             put_bits(&s->pb, 4, s->avctx->level);   // level
 331
 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
 342
 343             side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
 344             if (side_data) {
 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;
 349                 }
 350             }
 351
 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);
 358
 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
 371             }
 372         }
 373
 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;
 381
 382         s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
 383
 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);
 387
 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
 395     }
 396 }
 397
 398 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
 399 {
 400     while (run >= 33) {
 401         put_bits(&s->pb, 11, 0x008);
 402         run -= 33;
 403     }
 404     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
 405              ff_mpeg12_mbAddrIncrTable[run][0]);
 406 }
 407
 408 static av_always_inline void put_qscale(MpegEncContext *s)
 409 {
 410     put_bits(&s->pb, 5, s->qscale);
 411 }
 412
 413 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
 414 {
 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);
 419     } else {
 420         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
 421     }
 422     put_qscale(s);
 423     /* slice extra information */
 424     put_bits(&s->pb, 1, 0);
 425 }
 426
 427 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
 428 {
 429     AVFrameSideData *side_data;
 430     mpeg1_encode_sequence_header(s);
 431
 432     /* MPEG-1 picture header */
 433     put_header(s, PICTURE_START_CODE);
 434     /* temporal reference */
 435
 436     // RAL: s->picture_number instead of s->fake_picture_number
 437     put_bits(&s->pb, 10,
 438              (s->picture_number - s->gop_picture_number) & 0x3ff);
 439     put_bits(&s->pb, 3, s->pict_type);
 440
 441     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
 442     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
 443
 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 */
 450         else
 451             put_bits(&s->pb, 3, 7);             /* forward_f_code */
 452     }
 453
 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 */
 459         else
 460             put_bits(&s->pb, 3, 7);             /* backward_f_code */
 461     }
 462
 463     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
 464
 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);
 473         } else {
 474             put_bits(&s->pb, 8, 255);
 475         }
 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);
 479         } else {
 480             put_bits(&s->pb, 8, 255);
 481         }
 482         put_bits(&s->pb, 2, s->intra_dc_precision);
 483
 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 */
 488         else
 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;
 492
 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 */
 505     }
 506     if (s->scan_offset) {
 507         int i;
 508
 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]);
 512     }
 513     side_data = av_frame_get_side_data(s->current_picture_ptr->f,
 514                                        AV_FRAME_DATA_STEREO3D);
 515     if (side_data) {
 516         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
 517         uint8_t fpa_type;
 518
 519         switch (stereo->type) {
 520         case AV_STEREO3D_SIDEBYSIDE:
 521             fpa_type = 0x03;
 522             break;
 523         case AV_STEREO3D_TOPBOTTOM:
 524             fpa_type = 0x04;
 525             break;
 526         case AV_STEREO3D_2D:
 527             fpa_type = 0x08;
 528             break;
 529         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
 530             fpa_type = 0x23;
 531             break;
 532         default:
 533             fpa_type = 0;
 534             break;
 535         }
 536
 537         if (fpa_type != 0) {
 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
 544
 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]
 549         }
 550     }
 551
 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);
 555         if (side_data) {
 556             if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
 557                 int i = 0;
 558
 559                 put_header (s, USER_START_CODE);
 560
 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
 566                 put_bits(&s->pb, 8,
 567                     (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
 568                 put_bits(&s->pb, 8, 0xff);                  // em_data
 569
 570                 for (i = 0; i < side_data->size; i++)
 571                     put_bits(&s->pb, 8, side_data->data[i]);
 572
 573                 put_bits(&s->pb, 8, 0xff);                  // marker_bits
 574             } else {
 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);
 578             }
 579         }
 580     }
 581
 582     s->mb_y = 0;
 583     ff_mpeg1_encode_slice_header(s);
 584 }
 585
 586 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
 587                                 int has_mv, int field_motion)
 588 {
 589     put_bits(&s->pb, n, bits);
 590     if (!s->frame_pred_frame_dct) {
 591         if (has_mv)
 592             /* motion_type: frame/field */
 593             put_bits(&s->pb, 2, 2 - field_motion);
 594         put_bits(&s->pb, 1, s->interlaced_dct);
 595     }
 596 }
 597
 598 // RAL: Parameter added: f_or_b_code
 599 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
 600 {
 601     if (val == 0) {
 602         /* zero vector */
 603         put_bits(&s->pb,
 604                  ff_mpeg12_mbMotionVectorTable[0][1],
 605                  ff_mpeg12_mbMotionVectorTable[0][0]);
 606     } else {
 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);
 612
 613         if (val >= 0) {
 614             val--;
 615             code = (val >> bit_size) + 1;
 616             bits = val & (range - 1);
 617             sign = 0;
 618         } else {
 619             val = -val;
 620             val--;
 621             code = (val >> bit_size) + 1;
 622             bits = val & (range - 1);
 623             sign = 1;
 624         }
 625
 626         av_assert2(code > 0 && code <= 16);
 627
 628         put_bits(&s->pb,
 629                  ff_mpeg12_mbMotionVectorTable[code][1],
 630                  ff_mpeg12_mbMotionVectorTable[code][0]);
 631
 632         put_bits(&s->pb, 1, sign);
 633         if (bit_size > 0)
 634             put_bits(&s->pb, bit_size, bits);
 635     }
 636 }
 637
 638 static inline void encode_dc(MpegEncContext *s, int diff, int component)
 639 {
 640     unsigned int diff_u = diff + 255;
 641     if (diff_u >= 511) {
 642         int index;
 643
 644         if (diff < 0) {
 645             index = av_log2_16bit(-2 * diff);
 646             diff--;
 647         } else {
 648             index = av_log2_16bit(2 * diff);
 649         }
 650         if (component == 0)
 651             put_bits(&s->pb,
 652                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
 653                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 654                      av_mod_uintp2(diff, index));
 655         else
 656             put_bits(&s->pb,
 657                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
 658                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 659                      av_mod_uintp2(diff, index));
 660     } else {
 661         if (component == 0)
 662             put_bits(&s->pb,
 663                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
 664                      mpeg1_lum_dc_uni[diff + 255] >> 8);
 665         else
 666             put_bits(&s->pb,
 667                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
 668                      mpeg1_chr_dc_uni[diff + 255] >> 8);
 669     }
 670 }
 671
 672 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
 673 {
 674     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
 675     int code, component;
 676     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
 677
 678     last_index = s->block_last_index[n];
 679
 680     /* DC coef */
 681     if (s->mb_intra) {
 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;
 687         i = 1;
 688         if (s->intra_vlc_format)
 689             table_vlc = ff_rl_mpeg2.table_vlc;
 690     } else {
 691         /* encode the first coefficient: needs to be done here because
 692          * it is handled slightly differently */
 693         level = block[0];
 694         if (abs(level) == 1) {
 695             code = ((uint32_t)level >> 31);     /* the sign bit */
 696             put_bits(&s->pb, 2, code | 0x02);
 697             i = 1;
 698         } else {
 699             i             = 0;
 700             last_non_zero = -1;
 701             goto next_coef;
 702         }
 703     }
 704
 705     /* now quantify & encode AC coefs */
 706     last_non_zero = i - 1;
 707
 708     for (; i <= last_index; i++) {
 709         j     = s->intra_scantable.permutated[i];
 710         level = block[j];
 711
 712 next_coef:
 713         /* encode using VLC */
 714         if (level != 0) {
 715             run = i - last_non_zero - 1;
 716
 717             alevel = level;
 718             MASK_ABS(sign, alevel);
 719             sign &= 1;
 720
 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);
 726             } else {
 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) {
 732                     if (alevel < 128) {
 733                         put_sbits(&s->pb, 8, level);
 734                     } else {
 735                         if (level < 0)
 736                             put_bits(&s->pb, 16, 0x8001 + level + 255);
 737                         else
 738                             put_sbits(&s->pb, 16, level);
 739                     }
 740                 } else {
 741                     put_sbits(&s->pb, 12, level);
 742                 }
 743             }
 744             last_non_zero = i;
 745         }
 746     }
 747     /* end of block */
 748     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
 749 }
 750
 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,
 754                                                       int mb_block_count)
 755 {
 756     int i, cbp;
 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;
 760
 761     /* compute cbp */
 762     cbp = 0;
 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);
 766
 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))) {
 778         s->mb_skip_run++;
 779         s->qscale -= s->dquant;
 780         s->skip_count++;
 781         s->misc_bits++;
 782         s->last_bits++;
 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;
 788         }
 789     } else {
 790         if (first_mb) {
 791             av_assert0(s->mb_skip_run == 0);
 792             encode_mb_skip_run(s, s->mb_x);
 793         } else {
 794             encode_mb_skip_run(s, s->mb_skip_run);
 795         }
 796
 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);
 801                 put_qscale(s);
 802             } else {
 803                 /* macroblock_type: macroblock_quant = 0 */
 804                 put_mb_modes(s, 1, 1, 0, 0);
 805                 s->qscale -= s->dquant;
 806             }
 807             s->misc_bits += get_bits_diff(s);
 808             s->i_count++;
 809         } else if (s->mb_intra) {
 810             if (s->dquant && cbp) {
 811                 put_mb_modes(s, 6, 0x01, 0, 0);
 812                 put_qscale(s);
 813             } else {
 814                 put_mb_modes(s, 5, 0x03, 0, 0);
 815                 s->qscale -= s->dquant;
 816             }
 817             s->misc_bits += get_bits_diff(s);
 818             s->i_count++;
 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) {
 822                 if (cbp != 0) {
 823                     if ((motion_x | motion_y) == 0) {
 824                         if (s->dquant) {
 825                             /* macroblock_pattern & quant */
 826                             put_mb_modes(s, 5, 1, 0, 0);
 827                             put_qscale(s);
 828                         } else {
 829                             /* macroblock_pattern only */
 830                             put_mb_modes(s, 2, 1, 0, 0);
 831                         }
 832                         s->misc_bits += get_bits_diff(s);
 833                     } else {
 834                         if (s->dquant) {
 835                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
 836                             put_qscale(s);
 837                         } else {
 838                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
 839                         }
 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],
 844                                             s->f_code);
 845                         // RAL: f_code parameter added
 846                         mpeg1_encode_motion(s,
 847                                             motion_y - s->last_mv[0][0][1],
 848                                             s->f_code);
 849                         s->mv_bits += get_bits_diff(s);
 850                     }
 851                 } else {
 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],
 859                                         s->f_code);
 860                     // RAL: f_code parameter added
 861                     mpeg1_encode_motion(s,
 862                                         motion_y - s->last_mv[0][0][1],
 863                                         s->f_code);
 864                     s->qscale  -= s->dquant;
 865                     s->mv_bits += get_bits_diff(s);
 866                 }
 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;
 869             } else {
 870                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
 871
 872                 if (cbp) {
 873                     if (s->dquant) {
 874                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
 875                         put_qscale(s);
 876                     } else {
 877                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
 878                     }
 879                 } else {
 880                     put_bits(&s->pb, 3, 1);             /* motion only */
 881                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
 882                     s->qscale -= s->dquant;
 883                 }
 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],
 889                                         s->f_code);
 890                     mpeg1_encode_motion(s,
 891                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 892                                         s->f_code);
 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];
 895                 }
 896                 s->mv_bits += get_bits_diff(s);
 897             }
 898             if (cbp) {
 899                 if (s->chroma_y_shift) {
 900                     put_bits(&s->pb,
 901                              ff_mpeg12_mbPatTable[cbp][1],
 902                              ff_mpeg12_mbPatTable[cbp][0]);
 903                 } else {
 904                     put_bits(&s->pb,
 905                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 906                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 907                     put_sbits(&s->pb, 2, cbp);
 908                 }
 909             }
 910             s->f_count++;
 911         } else {
 912             if (s->mv_type == MV_TYPE_16X16) {
 913                 if (cbp) {                      // With coded bloc pattern
 914                     if (s->dquant) {
 915                         if (s->mv_dir == MV_DIR_FORWARD)
 916                             put_mb_modes(s, 6, 3, 1, 0);
 917                         else
 918                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
 919                         put_qscale(s);
 920                     } else {
 921                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
 922                     }
 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;
 928                 }
 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],
 933                                         s->f_code);
 934                     mpeg1_encode_motion(s,
 935                                         s->mv[0][0][1] - s->last_mv[0][0][1],
 936                                         s->f_code);
 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];
 941                     s->f_count++;
 942                 }
 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],
 946                                         s->b_code);
 947                     mpeg1_encode_motion(s,
 948                                         s->mv[1][0][1] - s->last_mv[1][0][1],
 949                                         s->b_code);
 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];
 954                     s->b_count++;
 955                 }
 956             } else {
 957                 av_assert2(s->mv_type == MV_TYPE_FIELD);
 958                 av_assert2(!s->frame_pred_frame_dct);
 959                 if (cbp) {                      // With coded bloc pattern
 960                     if (s->dquant) {
 961                         if (s->mv_dir == MV_DIR_FORWARD)
 962                             put_mb_modes(s, 6, 3, 1, 1);
 963                         else
 964                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
 965                         put_qscale(s);
 966                     } else {
 967                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
 968                     }
 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;
 973                 }
 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],
 980                                             s->f_code);
 981                         mpeg1_encode_motion(s,
 982                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 983                                             s->f_code);
 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;
 986                     }
 987                     s->f_count++;
 988                 }
 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],
 994                                             s->b_code);
 995                         mpeg1_encode_motion(s,
 996                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
 997                                             s->b_code);
 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;
1000                     }
1001                     s->b_count++;
1002                 }
1003             }
1004             s->mv_bits += get_bits_diff(s);
1005             if (cbp) {
1006                 if (s->chroma_y_shift) {
1007                     put_bits(&s->pb,
1008                              ff_mpeg12_mbPatTable[cbp][1],
1009                              ff_mpeg12_mbPatTable[cbp][0]);
1010                 } else {
1011                     put_bits(&s->pb,
1012                              ff_mpeg12_mbPatTable[cbp >> 2][1],
1013                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
1014                     put_sbits(&s->pb, 2, cbp);
1015                 }
1016             }
1017         }
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);
1021         s->mb_skip_run = 0;
1022         if (s->mb_intra)
1023             s->i_tex_bits += get_bits_diff(s);
1024         else
1025             s->p_tex_bits += get_bits_diff(s);
1026     }
1027 }
1028
1029 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1030                         int motion_x, int motion_y)
1031 {
1032     if (s->chroma_format == CHROMA_420)
1033         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1034     else
1035         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1036 }
1037
1038 static av_cold void mpeg12_encode_init_static(void)
1039 {
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]);
1042
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];
1046     }
1047
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);
1050
1051     /* build unified dc encoding tables */
1052     for (int i = -255; i < 256; i++) {
1053         int adiff, index;
1054         int bits, code;
1055         int diff = i;
1056
1057         adiff = FFABS(diff);
1058         if (diff < 0)
1059             diff--;
1060         index = av_log2(2 * adiff);
1061
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);
1066
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);
1071     }
1072
1073     for (int f_code = 1; f_code <= MAX_FCODE; f_code++)
1074         for (int mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1075             int len;
1076
1077             if (mv == 0) {
1078                 len = ff_mpeg12_mbMotionVectorTable[0][1];
1079             } else {
1080                 int val, bit_size, code;
1081
1082                 bit_size = f_code - 1;
1083
1084                 val = mv;
1085                 if (val < 0)
1086                     val = -val;
1087                 val--;
1088                 code = (val >> bit_size) + 1;
1089                 if (code < 17)
1090                     len = ff_mpeg12_mbMotionVectorTable[code][1] +
1091                           1 + bit_size;
1092                 else
1093                     len = ff_mpeg12_mbMotionVectorTable[16][1] +
1094                           2 + bit_size;
1095             }
1096
1097             mv_penalty[f_code][mv + MAX_DMV] = len;
1098         }
1099
1100
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;
1104 }
1105
1106 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1107 {
1108     static AVOnce init_static_once = AV_ONCE_INIT;
1109
1110     ff_mpeg12_common_init(s);
1111
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;
1117     } else {
1118         s->min_qcoeff = -2047;
1119         s->max_qcoeff = 2047;
1120     }
1121     if (s->intra_vlc_format) {
1122         s->intra_ac_vlc_length      =
1123         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1124     } else {
1125         s->intra_ac_vlc_length      =
1126         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1127     }
1128     s->inter_ac_vlc_length      =
1129     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1130
1131     ff_thread_once(&init_static_once, mpeg12_encode_init_static);
1132 }
1133
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     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1140       OFFSET(intra_vlc_format),    AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1141     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1142       OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1143     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1144       OFFSET(scan_offset),         AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1145     { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1146       OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1147
1148 static const AVOption mpeg1_options[] = {
1149     COMMON_OPTS
1150     FF_MPV_COMMON_OPTS
1151     { NULL },
1152 };
1153
1154 static const AVOption mpeg2_options[] = {
1155     COMMON_OPTS
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) },
1174 #undef LEVEL
1175     FF_MPV_COMMON_OPTS
1176     FF_MPEG2_PROFILE_OPTS
1177     { NULL },
1178 };
1179
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,                \
1186 };
1187
1188 mpeg12_class(1)
1189 mpeg12_class(2)
1190
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,
1202                                                            AV_PIX_FMT_NONE },
1203     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1204     .caps_internal        = FF_CODEC_CAP_INIT_CLEANUP,
1205     .priv_class           = &mpeg1_class,
1206 };
1207
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,
1219                                                            AV_PIX_FMT_YUV422P,
1220                                                            AV_PIX_FMT_NONE },
1221     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1222     .caps_internal        = FF_CODEC_CAP_INIT_CLEANUP,
1223     .priv_class           = &mpeg2_class,
1224 };