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/timecode.h"
  35 #include "libavutil/stereo3d.h"
  36
  37 #include "avcodec.h"
  38 #include "bytestream.h"
  39 #include "mathops.h"
  40 #include "mpeg12.h"
  41 #include "mpeg12data.h"
  42 #include "mpegutils.h"
  43 #include "mpegvideo.h"
  44 #include "profiles.h"
  45
  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,
  49 };
  50
  51 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
  52 static uint8_t fcode_tab[MAX_MV * 2 + 1];
  53
  54 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
  55 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
  56
  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];
  61
  62 static uint8_t mpeg1_index_run[2][64];
  63 static int8_t  mpeg1_max_level[2][64];
  64
  65 #define A53_MAX_CC_COUNT 0x1f
  66
  67 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
  68 {
  69     int i;
  70
  71     for (i = 0; i < 128; i++) {
  72         int level = i - 64;
  73         int run;
  74         if (!level)
  75             continue;
  76         for (run = 0; run < 64; run++) {
  77             int len, code;
  78             int alevel = FFABS(level);
  79
  80             if (alevel > rl->max_level[0][run])
  81                 code = 111;                         /* rl->n */
  82             else
  83                 code = rl->index_run[0][run] + alevel - 1;
  84
  85             if (code < 111) {                       /* rl->n */
  86                 /* length of VLC and sign */
  87                 len = rl->table_vlc[code][1] + 1;
  88             } else {
  89                 len = rl->table_vlc[111 /* rl->n */][1] + 6;
  90
  91                 if (alevel < 128)
  92                     len += 8;
  93                 else
  94                     len += 16;
  95             }
  96
  97             uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
  98         }
  99     }
 100 }
 101
 102 static int find_frame_rate_index(MpegEncContext *s)
 103 {
 104     int i;
 105     AVRational bestq = (AVRational) {0, 0};
 106     AVRational ext;
 107     AVRational target = av_inv_q(s->avctx->time_base);
 108
 109     for (i = 1; i < 14; i++) {
 110         if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
 111             i >= 9)
 112             break;
 113
 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]);
 117
 118                 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
 119                     continue;
 120                 if (av_gcd(ext.den, ext.num) != 1)
 121                     continue;
 122
 123                 if (    bestq.num==0
 124                     || av_nearer_q(target, bestq, q) < 0
 125                     || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
 126                     bestq               = q;
 127                     s->frame_rate_index = i;
 128                     s->mpeg2_frame_rate_ext.num = ext.num;
 129                     s->mpeg2_frame_rate_ext.den = ext.den;
 130                 }
 131             }
 132         }
 133     }
 134
 135     if (av_cmp_q(target, bestq))
 136         return -1;
 137     else
 138         return 0;
 139 }
 140
 141 static av_cold int encode_init(AVCodecContext *avctx)
 142 {
 143     int ret;
 144     MpegEncContext *s = avctx->priv_data;
 145
 146     if ((ret = ff_mpv_encode_init(avctx)) < 0)
 147         return ret;
 148
 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);
 154         } else {
 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);
 158         }
 159     }
 160
 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);
 165         }
 166         /* Main or 4:2:2 */
 167         avctx->profile = s->chroma_format == CHROMA_420 ? FF_PROFILE_MPEG2_MAIN : FF_PROFILE_MPEG2_422;
 168     }
 169
 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 */
 174             else
 175                 avctx->level = 2;                   /* High */
 176         } else {
 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);
 181             }
 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 */
 186             else
 187                 avctx->level = 4;                   /* High */
 188         }
 189     }
 190
 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);
 194     }
 195
 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);
 201         }
 202     }
 203
 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);
 211     }
 212
 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
 218 #endif
 219
 220     if (s->tc_opt_str) {
 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);
 223         if (ret < 0)
 224             return ret;
 225         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
 226         s->timecode_frame_start = s->tc.start;
 227     } else {
 228         s->timecode_frame_start = 0; // default is -1
 229     }
 230
 231     return 0;
 232 }
 233
 234 static void put_header(MpegEncContext *s, int header)
 235 {
 236     avpriv_align_put_bits(&s->pb);
 237     put_bits(&s->pb, 16, header >> 16);
 238     put_sbits(&s->pb, 16, header);
 239 }
 240
 241 /* put sequence header if needed */
 242 static void mpeg1_encode_sequence_header(MpegEncContext *s)
 243 {
 244     unsigned int vbv_buffer_size, fps, v;
 245     int i, constraint_parameter_flag;
 246     uint64_t time_code;
 247     int64_t best_aspect_error = INT64_MAX;
 248     AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
 249
 250     if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
 251         aspect_ratio = (AVRational){1,1};             // pixel aspect 1.1 (VGA)
 252
 253     if (s->current_picture.f->key_frame) {
 254         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 255
 256         /* MPEG-1 header repeated every GOP */
 257         put_header(s, SEQ_START_CODE);
 258
 259         put_sbits(&s->pb, 12, s->width  & 0xFFF);
 260         put_sbits(&s->pb, 12, s->height & 0xFFF);
 261
 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];
 266             else
 267                 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
 268
 269             error = FFABS(error);
 270
 271             if (error - 2 <= best_aspect_error) {
 272                 best_aspect_error    = error;
 273                 s->aspect_ratio_info = i;
 274             }
 275         }
 276
 277         put_bits(&s->pb, 4, s->aspect_ratio_info);
 278         put_bits(&s->pb, 4, s->frame_rate_index);
 279
 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)
 283                 v = 0x3ffff;
 284         } else {
 285             v = 0x3FFFF;
 286         }
 287
 288         if (s->avctx->rc_buffer_size)
 289             vbv_buffer_size = s->avctx->rc_buffer_size;
 290         else
 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;
 295
 296         put_sbits(&s->pb, 18, v);
 297         put_bits(&s->pb, 1, 1);         // marker
 298         put_sbits(&s->pb, 10, vbv_buffer_size);
 299
 300         constraint_parameter_flag =
 301             s->width  <= 768                                    &&
 302             s->height <= 576                                    &&
 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;
 311
 312         put_bits(&s->pb, 1, constraint_parameter_flag);
 313
 314         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
 315         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
 316
 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;
 322
 323             put_header(s, EXT_START_CODE);
 324             put_bits(&s->pb, 4, 1);                 // seq ext
 325
 326             put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
 327
 328             put_bits(&s->pb, 3, s->avctx->profile); // profile
 329             put_bits(&s->pb, 4, s->avctx->level);   // level
 330
 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
 341
 342             side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
 343             if (side_data) {
 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;
 348                 }
 349             }
 350
 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);
 357
 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
 370             }
 371         }
 372
 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;
 380
 381         s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
 382
 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);
 386
 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
 394     }
 395 }
 396
 397 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
 398 {
 399     while (run >= 33) {
 400         put_bits(&s->pb, 11, 0x008);
 401         run -= 33;
 402     }
 403     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
 404              ff_mpeg12_mbAddrIncrTable[run][0]);
 405 }
 406
 407 static av_always_inline void put_qscale(MpegEncContext *s)
 408 {
 409     put_bits(&s->pb, 5, s->qscale);
 410 }
 411
 412 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
 413 {
 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);
 418     } else {
 419         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
 420     }
 421     put_qscale(s);
 422     /* slice extra information */
 423     put_bits(&s->pb, 1, 0);
 424 }
 425
 426 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
 427 {
 428     AVFrameSideData *side_data;
 429     mpeg1_encode_sequence_header(s);
 430
 431     /* MPEG-1 picture header */
 432     put_header(s, PICTURE_START_CODE);
 433     /* temporal reference */
 434
 435     // RAL: s->picture_number instead of s->fake_picture_number
 436     put_bits(&s->pb, 10,
 437              (s->picture_number - s->gop_picture_number) & 0x3ff);
 438     put_bits(&s->pb, 3, s->pict_type);
 439
 440     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
 441     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
 442
 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 */
 449         else
 450             put_bits(&s->pb, 3, 7);             /* forward_f_code */
 451     }
 452
 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 */
 458         else
 459             put_bits(&s->pb, 3, 7);             /* backward_f_code */
 460     }
 461
 462     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
 463
 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);
 472         } else {
 473             put_bits(&s->pb, 8, 255);
 474         }
 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);
 478         } else {
 479             put_bits(&s->pb, 8, 255);
 480         }
 481         put_bits(&s->pb, 2, s->intra_dc_precision);
 482
 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 */
 487         else
 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;
 491
 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 */
 504     }
 505     if (s->scan_offset) {
 506         int i;
 507
 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]);
 511     }
 512     side_data = av_frame_get_side_data(s->current_picture_ptr->f,
 513                                        AV_FRAME_DATA_STEREO3D);
 514     if (side_data) {
 515         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
 516         uint8_t fpa_type;
 517
 518         switch (stereo->type) {
 519         case AV_STEREO3D_SIDEBYSIDE:
 520             fpa_type = 0x03;
 521             break;
 522         case AV_STEREO3D_TOPBOTTOM:
 523             fpa_type = 0x04;
 524             break;
 525         case AV_STEREO3D_2D:
 526             fpa_type = 0x08;
 527             break;
 528         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
 529             fpa_type = 0x23;
 530             break;
 531         default:
 532             fpa_type = 0;
 533             break;
 534         }
 535
 536         if (fpa_type != 0) {
 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
 543
 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]
 548         }
 549     }
 550
 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);
 554         if (side_data) {
 555             if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
 556                 int i = 0;
 557
 558                 put_header (s, USER_START_CODE);
 559
 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
 565                 put_bits(&s->pb, 8,
 566                     (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
 567                 put_bits(&s->pb, 8, 0xff);                  // em_data
 568
 569                 for (i = 0; i < side_data->size; i++)
 570                     put_bits(&s->pb, 8, side_data->data[i]);
 571
 572                 put_bits(&s->pb, 8, 0xff);                  // marker_bits
 573             } else {
 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);
 577             }
 578         }
 579     }
 580
 581     s->mb_y = 0;
 582     ff_mpeg1_encode_slice_header(s);
 583 }
 584
 585 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
 586                                 int has_mv, int field_motion)
 587 {
 588     put_bits(&s->pb, n, bits);
 589     if (!s->frame_pred_frame_dct) {
 590         if (has_mv)
 591             /* motion_type: frame/field */
 592             put_bits(&s->pb, 2, 2 - field_motion);
 593         put_bits(&s->pb, 1, s->interlaced_dct);
 594     }
 595 }
 596
 597 // RAL: Parameter added: f_or_b_code
 598 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
 599 {
 600     if (val == 0) {
 601         /* zero vector */
 602         put_bits(&s->pb,
 603                  ff_mpeg12_mbMotionVectorTable[0][1],
 604                  ff_mpeg12_mbMotionVectorTable[0][0]);
 605     } else {
 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);
 611
 612         if (val >= 0) {
 613             val--;
 614             code = (val >> bit_size) + 1;
 615             bits = val & (range - 1);
 616             sign = 0;
 617         } else {
 618             val = -val;
 619             val--;
 620             code = (val >> bit_size) + 1;
 621             bits = val & (range - 1);
 622             sign = 1;
 623         }
 624
 625         av_assert2(code > 0 && code <= 16);
 626
 627         put_bits(&s->pb,
 628                  ff_mpeg12_mbMotionVectorTable[code][1],
 629                  ff_mpeg12_mbMotionVectorTable[code][0]);
 630
 631         put_bits(&s->pb, 1, sign);
 632         if (bit_size > 0)
 633             put_bits(&s->pb, bit_size, bits);
 634     }
 635 }
 636
 637 static inline void encode_dc(MpegEncContext *s, int diff, int component)
 638 {
 639     unsigned int diff_u = diff + 255;
 640     if (diff_u >= 511) {
 641         int index;
 642
 643         if (diff < 0) {
 644             index = av_log2_16bit(-2 * diff);
 645             diff--;
 646         } else {
 647             index = av_log2_16bit(2 * diff);
 648         }
 649         if (component == 0)
 650             put_bits(&s->pb,
 651                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
 652                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 653                      av_mod_uintp2(diff, index));
 654         else
 655             put_bits(&s->pb,
 656                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
 657                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 658                      av_mod_uintp2(diff, index));
 659     } else {
 660         if (component == 0)
 661             put_bits(&s->pb,
 662                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
 663                      mpeg1_lum_dc_uni[diff + 255] >> 8);
 664         else
 665             put_bits(&s->pb,
 666                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
 667                      mpeg1_chr_dc_uni[diff + 255] >> 8);
 668     }
 669 }
 670
 671 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
 672 {
 673     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
 674     int code, component;
 675     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
 676
 677     last_index = s->block_last_index[n];
 678
 679     /* DC coef */
 680     if (s->mb_intra) {
 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;
 686         i = 1;
 687         if (s->intra_vlc_format)
 688             table_vlc = ff_rl_mpeg2.table_vlc;
 689     } else {
 690         /* encode the first coefficient: needs to be done here because
 691          * it is handled slightly differently */
 692         level = block[0];
 693         if (abs(level) == 1) {
 694             code = ((uint32_t)level >> 31);     /* the sign bit */
 695             put_bits(&s->pb, 2, code | 0x02);
 696             i = 1;
 697         } else {
 698             i             = 0;
 699             last_non_zero = -1;
 700             goto next_coef;
 701         }
 702     }
 703
 704     /* now quantify & encode AC coefs */
 705     last_non_zero = i - 1;
 706
 707     for (; i <= last_index; i++) {
 708         j     = s->intra_scantable.permutated[i];
 709         level = block[j];
 710
 711 next_coef:
 712         /* encode using VLC */
 713         if (level != 0) {
 714             run = i - last_non_zero - 1;
 715
 716             alevel = level;
 717             MASK_ABS(sign, alevel);
 718             sign &= 1;
 719
 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);
 725             } else {
 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) {
 731                     if (alevel < 128) {
 732                         put_sbits(&s->pb, 8, level);
 733                     } else {
 734                         if (level < 0)
 735                             put_bits(&s->pb, 16, 0x8001 + level + 255);
 736                         else
 737                             put_sbits(&s->pb, 16, level);
 738                     }
 739                 } else {
 740                     put_sbits(&s->pb, 12, level);
 741                 }
 742             }
 743             last_non_zero = i;
 744         }
 745     }
 746     /* end of block */
 747     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
 748 }
 749
 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,
 753                                                       int mb_block_count)
 754 {
 755     int i, cbp;
 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;
 759
 760     /* compute cbp */
 761     cbp = 0;
 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);
 765
 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))) {
 777         s->mb_skip_run++;
 778         s->qscale -= s->dquant;
 779         s->skip_count++;
 780         s->misc_bits++;
 781         s->last_bits++;
 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;
 787         }
 788     } else {
 789         if (first_mb) {
 790             av_assert0(s->mb_skip_run == 0);
 791             encode_mb_skip_run(s, s->mb_x);
 792         } else {
 793             encode_mb_skip_run(s, s->mb_skip_run);
 794         }
 795
 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);
 800                 put_qscale(s);
 801             } else {
 802                 /* macroblock_type: macroblock_quant = 0 */
 803                 put_mb_modes(s, 1, 1, 0, 0);
 804                 s->qscale -= s->dquant;
 805             }
 806             s->misc_bits += get_bits_diff(s);
 807             s->i_count++;
 808         } else if (s->mb_intra) {
 809             if (s->dquant && cbp) {
 810                 put_mb_modes(s, 6, 0x01, 0, 0);
 811                 put_qscale(s);
 812             } else {
 813                 put_mb_modes(s, 5, 0x03, 0, 0);
 814                 s->qscale -= s->dquant;
 815             }
 816             s->misc_bits += get_bits_diff(s);
 817             s->i_count++;
 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) {
 821                 if (cbp != 0) {
 822                     if ((motion_x | motion_y) == 0) {
 823                         if (s->dquant) {
 824                             /* macroblock_pattern & quant */
 825                             put_mb_modes(s, 5, 1, 0, 0);
 826                             put_qscale(s);
 827                         } else {
 828                             /* macroblock_pattern only */
 829                             put_mb_modes(s, 2, 1, 0, 0);
 830                         }
 831                         s->misc_bits += get_bits_diff(s);
 832                     } else {
 833                         if (s->dquant) {
 834                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
 835                             put_qscale(s);
 836                         } else {
 837                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
 838                         }
 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],
 843                                             s->f_code);
 844                         // RAL: f_code parameter added
 845                         mpeg1_encode_motion(s,
 846                                             motion_y - s->last_mv[0][0][1],
 847                                             s->f_code);
 848                         s->mv_bits += get_bits_diff(s);
 849                     }
 850                 } else {
 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],
 858                                         s->f_code);
 859                     // RAL: f_code parameter added
 860                     mpeg1_encode_motion(s,
 861                                         motion_y - s->last_mv[0][0][1],
 862                                         s->f_code);
 863                     s->qscale  -= s->dquant;
 864                     s->mv_bits += get_bits_diff(s);
 865                 }
 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;
 868             } else {
 869                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
 870
 871                 if (cbp) {
 872                     if (s->dquant) {
 873                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
 874                         put_qscale(s);
 875                     } else {
 876                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
 877                     }
 878                 } else {
 879                     put_bits(&s->pb, 3, 1);             /* motion only */
 880                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
 881                     s->qscale -= s->dquant;
 882                 }
 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],
 888                                         s->f_code);
 889                     mpeg1_encode_motion(s,
 890                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 891                                         s->f_code);
 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];
 894                 }
 895                 s->mv_bits += get_bits_diff(s);
 896             }
 897             if (cbp) {
 898                 if (s->chroma_y_shift) {
 899                     put_bits(&s->pb,
 900                              ff_mpeg12_mbPatTable[cbp][1],
 901                              ff_mpeg12_mbPatTable[cbp][0]);
 902                 } else {
 903                     put_bits(&s->pb,
 904                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 905                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 906                     put_sbits(&s->pb, 2, cbp);
 907                 }
 908             }
 909             s->f_count++;
 910         } else {
 911             if (s->mv_type == MV_TYPE_16X16) {
 912                 if (cbp) {                      // With coded bloc pattern
 913                     if (s->dquant) {
 914                         if (s->mv_dir == MV_DIR_FORWARD)
 915                             put_mb_modes(s, 6, 3, 1, 0);
 916                         else
 917                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
 918                         put_qscale(s);
 919                     } else {
 920                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
 921                     }
 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;
 927                 }
 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],
 932                                         s->f_code);
 933                     mpeg1_encode_motion(s,
 934                                         s->mv[0][0][1] - s->last_mv[0][0][1],
 935                                         s->f_code);
 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];
 940                     s->f_count++;
 941                 }
 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],
 945                                         s->b_code);
 946                     mpeg1_encode_motion(s,
 947                                         s->mv[1][0][1] - s->last_mv[1][0][1],
 948                                         s->b_code);
 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];
 953                     s->b_count++;
 954                 }
 955             } else {
 956                 av_assert2(s->mv_type == MV_TYPE_FIELD);
 957                 av_assert2(!s->frame_pred_frame_dct);
 958                 if (cbp) {                      // With coded bloc pattern
 959                     if (s->dquant) {
 960                         if (s->mv_dir == MV_DIR_FORWARD)
 961                             put_mb_modes(s, 6, 3, 1, 1);
 962                         else
 963                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
 964                         put_qscale(s);
 965                     } else {
 966                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
 967                     }
 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;
 972                 }
 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],
 979                                             s->f_code);
 980                         mpeg1_encode_motion(s,
 981                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 982                                             s->f_code);
 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;
 985                     }
 986                     s->f_count++;
 987                 }
 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],
 993                                             s->b_code);
 994                         mpeg1_encode_motion(s,
 995                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
 996                                             s->b_code);
 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;
 999                     }
1000                     s->b_count++;
1001                 }
1002             }
1003             s->mv_bits += get_bits_diff(s);
1004             if (cbp) {
1005                 if (s->chroma_y_shift) {
1006                     put_bits(&s->pb,
1007                              ff_mpeg12_mbPatTable[cbp][1],
1008                              ff_mpeg12_mbPatTable[cbp][0]);
1009                 } else {
1010                     put_bits(&s->pb,
1011                              ff_mpeg12_mbPatTable[cbp >> 2][1],
1012                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
1013                     put_sbits(&s->pb, 2, cbp);
1014                 }
1015             }
1016         }
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);
1020         s->mb_skip_run = 0;
1021         if (s->mb_intra)
1022             s->i_tex_bits += get_bits_diff(s);
1023         else
1024             s->p_tex_bits += get_bits_diff(s);
1025     }
1026 }
1027
1028 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1029                         int motion_x, int motion_y)
1030 {
1031     if (s->chroma_format == CHROMA_420)
1032         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1033     else
1034         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1035 }
1036
1037 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1038 {
1039     static int done = 0;
1040
1041     ff_mpeg12_common_init(s);
1042
1043     if (!done) {
1044         int f_code;
1045         int mv;
1046         int i;
1047
1048         done = 1;
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]);
1051
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];
1055         }
1056
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);
1060
1061         /* build unified dc encoding tables */
1062         for (i = -255; i < 256; i++) {
1063             int adiff, index;
1064             int bits, code;
1065             int diff = i;
1066
1067             adiff = FFABS(diff);
1068             if (diff < 0)
1069                 diff--;
1070             index = av_log2(2 * adiff);
1071
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);
1076
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);
1081         }
1082
1083         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1084             for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1085                 int len;
1086
1087                 if (mv == 0) {
1088                     len = ff_mpeg12_mbMotionVectorTable[0][1];
1089                 } else {
1090                     int val, bit_size, code;
1091
1092                     bit_size = f_code - 1;
1093
1094                     val = mv;
1095                     if (val < 0)
1096                         val = -val;
1097                     val--;
1098                     code = (val >> bit_size) + 1;
1099                     if (code < 17)
1100                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1101                               1 + bit_size;
1102                     else
1103                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1104                               2 + bit_size;
1105                 }
1106
1107                 mv_penalty[f_code][mv + MAX_DMV] = len;
1108             }
1109
1110
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;
1114     }
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;
1120     } else {
1121         s->min_qcoeff = -2047;
1122         s->max_qcoeff = 2047;
1123     }
1124     if (s->intra_vlc_format) {
1125         s->intra_ac_vlc_length      =
1126         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1127     } else {
1128         s->intra_ac_vlc_length      =
1129         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1130     }
1131     s->inter_ac_vlc_length      =
1132     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1133 }
1134
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}, \
1148
1149 static const AVOption mpeg1_options[] = {
1150     COMMON_OPTS
1151     FF_MPV_COMMON_OPTS
1152     { NULL },
1153 };
1154
1155 static const AVOption mpeg2_options[] = {
1156     COMMON_OPTS
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) },
1175 #undef LEVEL
1176     FF_MPV_COMMON_OPTS
1177     FF_MPEG2_PROFILE_OPTS
1178     { NULL },
1179 };
1180
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,                \
1187 };
1188
1189 mpeg12_class(1)
1190 mpeg12_class(2)
1191
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,
1203                                                            AV_PIX_FMT_NONE },
1204     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1205     .caps_internal        = FF_CODEC_CAP_INIT_CLEANUP,
1206     .priv_class           = &mpeg1_class,
1207 };
1208
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,
1220                                                            AV_PIX_FMT_YUV422P,
1221                                                            AV_PIX_FMT_NONE },
1222     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1223     .caps_internal        = FF_CODEC_CAP_INIT_CLEANUP,
1224     .priv_class           = &mpeg2_class,
1225 };