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
  45 static const uint8_t svcd_scan_offset_placeholder[] = {
  46     0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
  47     0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  48 };
  49
  50 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
  51 static uint8_t fcode_tab[MAX_MV * 2 + 1];
  52
  53 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
  54 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
  55
  56 /* simple include everything table for dc, first byte is bits
  57  * number next 3 are code */
  58 static uint32_t mpeg1_lum_dc_uni[512];
  59 static uint32_t mpeg1_chr_dc_uni[512];
  60
  61 static uint8_t mpeg1_index_run[2][64];
  62 static int8_t  mpeg1_max_level[2][64];
  63
  64 #define A53_MAX_CC_COUNT 0x1f
  65
  66 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
  67 {
  68     int i;
  69
  70     for (i = 0; i < 128; i++) {
  71         int level = i - 64;
  72         int run;
  73         if (!level)
  74             continue;
  75         for (run = 0; run < 64; run++) {
  76             int len, code;
  77             int alevel = FFABS(level);
  78
  79             if (alevel > rl->max_level[0][run])
  80                 code = 111;                         /* rl->n */
  81             else
  82                 code = rl->index_run[0][run] + alevel - 1;
  83
  84             if (code < 111) {                       /* rl->n */
  85                 /* length of VLC and sign */
  86                 len = rl->table_vlc[code][1] + 1;
  87             } else {
  88                 len = rl->table_vlc[111 /* rl->n */][1] + 6;
  89
  90                 if (alevel < 128)
  91                     len += 8;
  92                 else
  93                     len += 16;
  94             }
  95
  96             uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
  97         }
  98     }
  99 }
 100
 101 static int find_frame_rate_index(MpegEncContext *s)
 102 {
 103     int i;
 104     AVRational bestq = (AVRational) {0, 0};
 105     AVRational ext;
 106     AVRational target = av_inv_q(s->avctx->time_base);
 107
 108     for (i = 1; i < 14; i++) {
 109         if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
 110             i >= 9)
 111             break;
 112
 113         for (ext.num=1; ext.num <= 4; ext.num++) {
 114             for (ext.den=1; ext.den <= 32; ext.den++) {
 115                 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
 116
 117                 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
 118                     continue;
 119                 if (av_gcd(ext.den, ext.num) != 1)
 120                     continue;
 121
 122                 if (    bestq.num==0
 123                     || av_nearer_q(target, bestq, q) < 0
 124                     || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
 125                     bestq               = q;
 126                     s->frame_rate_index = i;
 127                     s->mpeg2_frame_rate_ext.num = ext.num;
 128                     s->mpeg2_frame_rate_ext.den = ext.den;
 129                 }
 130             }
 131         }
 132     }
 133
 134     if (av_cmp_q(target, bestq))
 135         return -1;
 136     else
 137         return 0;
 138 }
 139
 140 static av_cold int encode_init(AVCodecContext *avctx)
 141 {
 142     MpegEncContext *s = avctx->priv_data;
 143
 144     if (ff_mpv_encode_init(avctx) < 0)
 145         return -1;
 146
 147     if (find_frame_rate_index(s) < 0) {
 148         if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
 149             av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
 150                    avctx->time_base.den, avctx->time_base.num);
 151             return -1;
 152         } else {
 153             av_log(avctx, AV_LOG_INFO,
 154                    "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
 155                    avctx->time_base.den, avctx->time_base.num);
 156         }
 157     }
 158
 159     if (avctx->profile == FF_PROFILE_UNKNOWN) {
 160         if (avctx->level != FF_LEVEL_UNKNOWN) {
 161             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
 162             return -1;
 163         }
 164         /* Main or 4:2:2 */
 165         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
 166     }
 167
 168     if (avctx->level == FF_LEVEL_UNKNOWN) {
 169         if (avctx->profile == 0) {                  /* 4:2:2 */
 170             if (avctx->width <= 720 && avctx->height <= 608)
 171                 avctx->level = 5;                   /* Main */
 172             else
 173                 avctx->level = 2;                   /* High */
 174         } else {
 175             if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
 176                 av_log(avctx, AV_LOG_ERROR,
 177                        "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
 178                 return -1;
 179             }
 180             if (avctx->width <= 720 && avctx->height <= 576)
 181                 avctx->level = 8;                   /* Main */
 182             else if (avctx->width <= 1440)
 183                 avctx->level = 6;                   /* High 1440 */
 184             else
 185                 avctx->level = 4;                   /* High */
 186         }
 187     }
 188
 189     if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
 190         av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
 191         return AVERROR(EINVAL);
 192     }
 193
 194     if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
 195         if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
 196             av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
 197                                         "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
 198             return AVERROR(EINVAL);
 199         }
 200     }
 201
 202     s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
 203     if (s->drop_frame_timecode)
 204         s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
 205     if (s->drop_frame_timecode && s->frame_rate_index != 4) {
 206         av_log(avctx, AV_LOG_ERROR,
 207                "Drop frame time code only allowed with 1001/30000 fps\n");
 208         return -1;
 209     }
 210
 211 #if FF_API_PRIVATE_OPT
 212 FF_DISABLE_DEPRECATION_WARNINGS
 213     if (avctx->timecode_frame_start)
 214         s->timecode_frame_start = avctx->timecode_frame_start;
 215 FF_ENABLE_DEPRECATION_WARNINGS
 216 #endif
 217
 218     if (s->tc_opt_str) {
 219         AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 220         int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
 221         if (ret < 0)
 222             return ret;
 223         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
 224         s->timecode_frame_start = s->tc.start;
 225     } else {
 226         s->timecode_frame_start = 0; // default is -1
 227     }
 228
 229     return 0;
 230 }
 231
 232 static void put_header(MpegEncContext *s, int header)
 233 {
 234     avpriv_align_put_bits(&s->pb);
 235     put_bits(&s->pb, 16, header >> 16);
 236     put_sbits(&s->pb, 16, header);
 237 }
 238
 239 /* put sequence header if needed */
 240 static void mpeg1_encode_sequence_header(MpegEncContext *s)
 241 {
 242     unsigned int vbv_buffer_size, fps, v;
 243     int i, constraint_parameter_flag;
 244     uint64_t time_code;
 245     int64_t best_aspect_error = INT64_MAX;
 246     AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
 247
 248     if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
 249         aspect_ratio = (AVRational){1,1};             // pixel aspect 1.1 (VGA)
 250
 251     if (s->current_picture.f->key_frame) {
 252         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 253
 254         /* MPEG-1 header repeated every GOP */
 255         put_header(s, SEQ_START_CODE);
 256
 257         put_sbits(&s->pb, 12, s->width  & 0xFFF);
 258         put_sbits(&s->pb, 12, s->height & 0xFFF);
 259
 260         for (i = 1; i < 15; i++) {
 261             int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
 262             if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
 263                 error -= (1LL<<32) / ff_mpeg1_aspect[i];
 264             else
 265                 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
 266
 267             error = FFABS(error);
 268
 269             if (error - 2 <= best_aspect_error) {
 270                 best_aspect_error    = error;
 271                 s->aspect_ratio_info = i;
 272             }
 273         }
 274
 275         put_bits(&s->pb, 4, s->aspect_ratio_info);
 276         put_bits(&s->pb, 4, s->frame_rate_index);
 277
 278         if (s->avctx->rc_max_rate) {
 279             v = (s->avctx->rc_max_rate + 399) / 400;
 280             if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 281                 v = 0x3ffff;
 282         } else {
 283             v = 0x3FFFF;
 284         }
 285
 286         if (s->avctx->rc_buffer_size)
 287             vbv_buffer_size = s->avctx->rc_buffer_size;
 288         else
 289             /* VBV calculation: Scaled so that a VCD has the proper
 290              * VBV size of 40 kilobytes */
 291             vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
 292         vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
 293
 294         put_sbits(&s->pb, 18, v);
 295         put_bits(&s->pb, 1, 1);         // marker
 296         put_sbits(&s->pb, 10, vbv_buffer_size);
 297
 298         constraint_parameter_flag =
 299             s->width  <= 768                                    &&
 300             s->height <= 576                                    &&
 301             s->mb_width * s->mb_height                 <= 396   &&
 302             s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
 303             framerate.num <= framerate.den * 30                 &&
 304             s->avctx->me_range                                  &&
 305             s->avctx->me_range < 128                            &&
 306             vbv_buffer_size <= 20                               &&
 307             v <= 1856000 / 400                                  &&
 308             s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
 309
 310         put_bits(&s->pb, 1, constraint_parameter_flag);
 311
 312         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
 313         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
 314
 315         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 316             AVFrameSideData *side_data;
 317             int width = s->width;
 318             int height = s->height;
 319             int use_seq_disp_ext;
 320
 321             put_header(s, EXT_START_CODE);
 322             put_bits(&s->pb, 4, 1);                 // seq ext
 323
 324             put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
 325
 326             put_bits(&s->pb, 3, s->avctx->profile); // profile
 327             put_bits(&s->pb, 4, s->avctx->level);   // level
 328
 329             put_bits(&s->pb, 1, s->progressive_sequence);
 330             put_bits(&s->pb, 2, s->chroma_format);
 331             put_bits(&s->pb, 2, s->width  >> 12);
 332             put_bits(&s->pb, 2, s->height >> 12);
 333             put_bits(&s->pb, 12, v >> 18);          // bitrate ext
 334             put_bits(&s->pb, 1, 1);                 // marker
 335             put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
 336             put_bits(&s->pb, 1, s->low_delay);
 337             put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
 338             put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
 339
 340             side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
 341             if (side_data) {
 342                 AVPanScan *pan_scan = (AVPanScan *)side_data->data;
 343                 if (pan_scan->width && pan_scan->height) {
 344                     width = pan_scan->width >> 4;
 345                     height = pan_scan->height >> 4;
 346                 }
 347             }
 348
 349             use_seq_disp_ext = (width != s->width ||
 350                                 height != s->height ||
 351                                 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 352                                 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
 353                                 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
 354                                 s->video_format != VIDEO_FORMAT_UNSPECIFIED);
 355
 356             if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
 357                 put_header(s, EXT_START_CODE);
 358                 put_bits(&s->pb, 4, 2);                         // sequence display extension
 359                 put_bits(&s->pb, 3, s->video_format);           // video_format
 360                 put_bits(&s->pb, 1, 1);                         // colour_description
 361                 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
 362                 put_bits(&s->pb, 8, s->avctx->color_trc);       // transfer_characteristics
 363                 put_bits(&s->pb, 8, s->avctx->colorspace);      // matrix_coefficients
 364                 put_bits(&s->pb, 14, width);                    // display_horizontal_size
 365                 put_bits(&s->pb, 1, 1);                         // marker_bit
 366                 put_bits(&s->pb, 14, height);                   // display_vertical_size
 367                 put_bits(&s->pb, 3, 0);                         // remaining 3 bits are zero padding
 368             }
 369         }
 370
 371         put_header(s, GOP_START_CODE);
 372         put_bits(&s->pb, 1, s->drop_frame_timecode);    // drop frame flag
 373         /* time code: we must convert from the real frame rate to a
 374          * fake MPEG frame rate in case of low frame rate */
 375         fps       = (framerate.num + framerate.den / 2) / framerate.den;
 376         time_code = s->current_picture_ptr->f->coded_picture_number +
 377                     s->timecode_frame_start;
 378
 379         s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
 380
 381         av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
 382         if (s->drop_frame_timecode)
 383             time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
 384
 385         put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
 386         put_bits(&s->pb, 6, (uint32_t)((time_code / (fps *   60)) % 60));
 387         put_bits(&s->pb, 1, 1);
 388         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
 389         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
 390         put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
 391         put_bits(&s->pb, 1, 0);                     // broken link
 392     }
 393 }
 394
 395 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
 396 {
 397     while (run >= 33) {
 398         put_bits(&s->pb, 11, 0x008);
 399         run -= 33;
 400     }
 401     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
 402              ff_mpeg12_mbAddrIncrTable[run][0]);
 403 }
 404
 405 static av_always_inline void put_qscale(MpegEncContext *s)
 406 {
 407     put_bits(&s->pb, 5, s->qscale);
 408 }
 409
 410 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
 411 {
 412     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
 413         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
 414         /* slice_vertical_position_extension */
 415         put_bits(&s->pb, 3, s->mb_y >> 7);
 416     } else {
 417         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
 418     }
 419     put_qscale(s);
 420     /* slice extra information */
 421     put_bits(&s->pb, 1, 0);
 422 }
 423
 424 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
 425 {
 426     AVFrameSideData *side_data;
 427     mpeg1_encode_sequence_header(s);
 428
 429     /* MPEG-1 picture header */
 430     put_header(s, PICTURE_START_CODE);
 431     /* temporal reference */
 432
 433     // RAL: s->picture_number instead of s->fake_picture_number
 434     put_bits(&s->pb, 10,
 435              (s->picture_number - s->gop_picture_number) & 0x3ff);
 436     put_bits(&s->pb, 3, s->pict_type);
 437
 438     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
 439     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
 440
 441     // RAL: Forward f_code also needed for B-frames
 442     if (s->pict_type == AV_PICTURE_TYPE_P ||
 443         s->pict_type == AV_PICTURE_TYPE_B) {
 444         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 445         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 446             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
 447         else
 448             put_bits(&s->pb, 3, 7);             /* forward_f_code */
 449     }
 450
 451     // RAL: Backward f_code necessary for B-frames
 452     if (s->pict_type == AV_PICTURE_TYPE_B) {
 453         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 454         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 455             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
 456         else
 457             put_bits(&s->pb, 3, 7);             /* backward_f_code */
 458     }
 459
 460     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
 461
 462     s->frame_pred_frame_dct = 1;
 463     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 464         put_header(s, EXT_START_CODE);
 465         put_bits(&s->pb, 4, 8);                 /* pic ext */
 466         if (s->pict_type == AV_PICTURE_TYPE_P ||
 467             s->pict_type == AV_PICTURE_TYPE_B) {
 468             put_bits(&s->pb, 4, s->f_code);
 469             put_bits(&s->pb, 4, s->f_code);
 470         } else {
 471             put_bits(&s->pb, 8, 255);
 472         }
 473         if (s->pict_type == AV_PICTURE_TYPE_B) {
 474             put_bits(&s->pb, 4, s->b_code);
 475             put_bits(&s->pb, 4, s->b_code);
 476         } else {
 477             put_bits(&s->pb, 8, 255);
 478         }
 479         put_bits(&s->pb, 2, s->intra_dc_precision);
 480
 481         av_assert0(s->picture_structure == PICT_FRAME);
 482         put_bits(&s->pb, 2, s->picture_structure);
 483         if (s->progressive_sequence)
 484             put_bits(&s->pb, 1, 0);             /* no repeat */
 485         else
 486             put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
 487         /* XXX: optimize the generation of this flag with entropy measures */
 488         s->frame_pred_frame_dct = s->progressive_sequence;
 489
 490         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
 491         put_bits(&s->pb, 1, s->concealment_motion_vectors);
 492         put_bits(&s->pb, 1, s->q_scale_type);
 493         put_bits(&s->pb, 1, s->intra_vlc_format);
 494         put_bits(&s->pb, 1, s->alternate_scan);
 495         put_bits(&s->pb, 1, s->repeat_first_field);
 496         s->progressive_frame = s->progressive_sequence;
 497         /* chroma_420_type */
 498         put_bits(&s->pb, 1, s->chroma_format ==
 499                             CHROMA_420 ? s->progressive_frame : 0);
 500         put_bits(&s->pb, 1, s->progressive_frame);
 501         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
 502     }
 503     if (s->scan_offset) {
 504         int i;
 505
 506         put_header(s, USER_START_CODE);
 507         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
 508             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
 509     }
 510     side_data = av_frame_get_side_data(s->current_picture_ptr->f,
 511                                        AV_FRAME_DATA_STEREO3D);
 512     if (side_data) {
 513         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
 514         uint8_t fpa_type;
 515
 516         switch (stereo->type) {
 517         case AV_STEREO3D_SIDEBYSIDE:
 518             fpa_type = 0x03;
 519             break;
 520         case AV_STEREO3D_TOPBOTTOM:
 521             fpa_type = 0x04;
 522             break;
 523         case AV_STEREO3D_2D:
 524             fpa_type = 0x08;
 525             break;
 526         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
 527             fpa_type = 0x23;
 528             break;
 529         default:
 530             fpa_type = 0;
 531             break;
 532         }
 533
 534         if (fpa_type != 0) {
 535             put_header(s, USER_START_CODE);
 536             put_bits(&s->pb, 8, 'J');   // S3D_video_format_signaling_identifier
 537             put_bits(&s->pb, 8, 'P');
 538             put_bits(&s->pb, 8, '3');
 539             put_bits(&s->pb, 8, 'D');
 540             put_bits(&s->pb, 8, 0x03);  // S3D_video_format_length
 541
 542             put_bits(&s->pb, 1, 1);     // reserved_bit
 543             put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
 544             put_bits(&s->pb, 8, 0x04);  // reserved_data[0]
 545             put_bits(&s->pb, 8, 0xFF);  // reserved_data[1]
 546         }
 547     }
 548
 549     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->a53_cc) {
 550         side_data = av_frame_get_side_data(s->current_picture_ptr->f,
 551             AV_FRAME_DATA_A53_CC);
 552         if (side_data) {
 553             if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
 554                 int i = 0;
 555
 556                 put_header (s, USER_START_CODE);
 557
 558                 put_bits(&s->pb, 8, 'G');                   // user_identifier
 559                 put_bits(&s->pb, 8, 'A');
 560                 put_bits(&s->pb, 8, '9');
 561                 put_bits(&s->pb, 8, '4');
 562                 put_bits(&s->pb, 8, 3);                     // user_data_type_code
 563                 put_bits(&s->pb, 8,
 564                     (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
 565                 put_bits(&s->pb, 8, 0xff);                  // em_data
 566
 567                 for (i = 0; i < side_data->size; i++)
 568                     put_bits(&s->pb, 8, side_data->data[i]);
 569
 570                 put_bits(&s->pb, 8, 0xff);                  // marker_bits
 571             } else {
 572                 av_log(s->avctx, AV_LOG_WARNING,
 573                     "Warning Closed Caption size (%d) can not exceed 93 bytes "
 574                     "and must be a multiple of 3\n", side_data->size);
 575             }
 576         }
 577     }
 578
 579     s->mb_y = 0;
 580     ff_mpeg1_encode_slice_header(s);
 581 }
 582
 583 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
 584                                 int has_mv, int field_motion)
 585 {
 586     put_bits(&s->pb, n, bits);
 587     if (!s->frame_pred_frame_dct) {
 588         if (has_mv)
 589             /* motion_type: frame/field */
 590             put_bits(&s->pb, 2, 2 - field_motion);
 591         put_bits(&s->pb, 1, s->interlaced_dct);
 592     }
 593 }
 594
 595 // RAL: Parameter added: f_or_b_code
 596 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
 597 {
 598     if (val == 0) {
 599         /* zero vector */
 600         put_bits(&s->pb,
 601                  ff_mpeg12_mbMotionVectorTable[0][1],
 602                  ff_mpeg12_mbMotionVectorTable[0][0]);
 603     } else {
 604         int code, sign, bits;
 605         int bit_size = f_or_b_code - 1;
 606         int range    = 1 << bit_size;
 607         /* modulo encoding */
 608         val = sign_extend(val, 5 + bit_size);
 609
 610         if (val >= 0) {
 611             val--;
 612             code = (val >> bit_size) + 1;
 613             bits = val & (range - 1);
 614             sign = 0;
 615         } else {
 616             val = -val;
 617             val--;
 618             code = (val >> bit_size) + 1;
 619             bits = val & (range - 1);
 620             sign = 1;
 621         }
 622
 623         av_assert2(code > 0 && code <= 16);
 624
 625         put_bits(&s->pb,
 626                  ff_mpeg12_mbMotionVectorTable[code][1],
 627                  ff_mpeg12_mbMotionVectorTable[code][0]);
 628
 629         put_bits(&s->pb, 1, sign);
 630         if (bit_size > 0)
 631             put_bits(&s->pb, bit_size, bits);
 632     }
 633 }
 634
 635 static inline void encode_dc(MpegEncContext *s, int diff, int component)
 636 {
 637     unsigned int diff_u = diff + 255;
 638     if (diff_u >= 511) {
 639         int index;
 640
 641         if (diff < 0) {
 642             index = av_log2_16bit(-2 * diff);
 643             diff--;
 644         } else {
 645             index = av_log2_16bit(2 * diff);
 646         }
 647         if (component == 0)
 648             put_bits(&s->pb,
 649                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
 650                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 651                      av_mod_uintp2(diff, index));
 652         else
 653             put_bits(&s->pb,
 654                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
 655                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 656                      av_mod_uintp2(diff, index));
 657     } else {
 658         if (component == 0)
 659             put_bits(&s->pb,
 660                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
 661                      mpeg1_lum_dc_uni[diff + 255] >> 8);
 662         else
 663             put_bits(&s->pb,
 664                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
 665                      mpeg1_chr_dc_uni[diff + 255] >> 8);
 666     }
 667 }
 668
 669 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
 670 {
 671     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
 672     int code, component;
 673     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
 674
 675     last_index = s->block_last_index[n];
 676
 677     /* DC coef */
 678     if (s->mb_intra) {
 679         component = (n <= 3 ? 0 : (n & 1) + 1);
 680         dc        = block[0];                   /* overflow is impossible */
 681         diff      = dc - s->last_dc[component];
 682         encode_dc(s, diff, component);
 683         s->last_dc[component] = dc;
 684         i = 1;
 685         if (s->intra_vlc_format)
 686             table_vlc = ff_rl_mpeg2.table_vlc;
 687     } else {
 688         /* encode the first coefficient: needs to be done here because
 689          * it is handled slightly differently */
 690         level = block[0];
 691         if (abs(level) == 1) {
 692             code = ((uint32_t)level >> 31);     /* the sign bit */
 693             put_bits(&s->pb, 2, code | 0x02);
 694             i = 1;
 695         } else {
 696             i             = 0;
 697             last_non_zero = -1;
 698             goto next_coef;
 699         }
 700     }
 701
 702     /* now quantify & encode AC coefs */
 703     last_non_zero = i - 1;
 704
 705     for (; i <= last_index; i++) {
 706         j     = s->intra_scantable.permutated[i];
 707         level = block[j];
 708
 709 next_coef:
 710         /* encode using VLC */
 711         if (level != 0) {
 712             run = i - last_non_zero - 1;
 713
 714             alevel = level;
 715             MASK_ABS(sign, alevel);
 716             sign &= 1;
 717
 718             if (alevel <= mpeg1_max_level[0][run]) {
 719                 code = mpeg1_index_run[0][run] + alevel - 1;
 720                 /* store the VLC & sign at once */
 721                 put_bits(&s->pb, table_vlc[code][1] + 1,
 722                          (table_vlc[code][0] << 1) + sign);
 723             } else {
 724                 /* escape seems to be pretty rare <5% so I do not optimize it */
 725                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
 726                 /* escape: only clip in this case */
 727                 put_bits(&s->pb, 6, run);
 728                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
 729                     if (alevel < 128) {
 730                         put_sbits(&s->pb, 8, level);
 731                     } else {
 732                         if (level < 0)
 733                             put_bits(&s->pb, 16, 0x8001 + level + 255);
 734                         else
 735                             put_sbits(&s->pb, 16, level);
 736                     }
 737                 } else {
 738                     put_sbits(&s->pb, 12, level);
 739                 }
 740             }
 741             last_non_zero = i;
 742         }
 743     }
 744     /* end of block */
 745     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
 746 }
 747
 748 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
 749                                                       int16_t block[8][64],
 750                                                       int motion_x, int motion_y,
 751                                                       int mb_block_count)
 752 {
 753     int i, cbp;
 754     const int mb_x     = s->mb_x;
 755     const int mb_y     = s->mb_y;
 756     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
 757
 758     /* compute cbp */
 759     cbp = 0;
 760     for (i = 0; i < mb_block_count; i++)
 761         if (s->block_last_index[i] >= 0)
 762             cbp |= 1 << (mb_block_count - 1 - i);
 763
 764     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
 765         (mb_x != s->mb_width - 1 ||
 766          (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
 767         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
 768          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
 769           (((s->mv_dir & MV_DIR_FORWARD)
 770             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
 771                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
 772            ((s->mv_dir & MV_DIR_BACKWARD)
 773             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
 774                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
 775         s->mb_skip_run++;
 776         s->qscale -= s->dquant;
 777         s->skip_count++;
 778         s->misc_bits++;
 779         s->last_bits++;
 780         if (s->pict_type == AV_PICTURE_TYPE_P) {
 781             s->last_mv[0][0][0] =
 782             s->last_mv[0][0][1] =
 783             s->last_mv[0][1][0] =
 784             s->last_mv[0][1][1] = 0;
 785         }
 786     } else {
 787         if (first_mb) {
 788             av_assert0(s->mb_skip_run == 0);
 789             encode_mb_skip_run(s, s->mb_x);
 790         } else {
 791             encode_mb_skip_run(s, s->mb_skip_run);
 792         }
 793
 794         if (s->pict_type == AV_PICTURE_TYPE_I) {
 795             if (s->dquant && cbp) {
 796                 /* macroblock_type: macroblock_quant = 1 */
 797                 put_mb_modes(s, 2, 1, 0, 0);
 798                 put_qscale(s);
 799             } else {
 800                 /* macroblock_type: macroblock_quant = 0 */
 801                 put_mb_modes(s, 1, 1, 0, 0);
 802                 s->qscale -= s->dquant;
 803             }
 804             s->misc_bits += get_bits_diff(s);
 805             s->i_count++;
 806         } else if (s->mb_intra) {
 807             if (s->dquant && cbp) {
 808                 put_mb_modes(s, 6, 0x01, 0, 0);
 809                 put_qscale(s);
 810             } else {
 811                 put_mb_modes(s, 5, 0x03, 0, 0);
 812                 s->qscale -= s->dquant;
 813             }
 814             s->misc_bits += get_bits_diff(s);
 815             s->i_count++;
 816             memset(s->last_mv, 0, sizeof(s->last_mv));
 817         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
 818             if (s->mv_type == MV_TYPE_16X16) {
 819                 if (cbp != 0) {
 820                     if ((motion_x | motion_y) == 0) {
 821                         if (s->dquant) {
 822                             /* macroblock_pattern & quant */
 823                             put_mb_modes(s, 5, 1, 0, 0);
 824                             put_qscale(s);
 825                         } else {
 826                             /* macroblock_pattern only */
 827                             put_mb_modes(s, 2, 1, 0, 0);
 828                         }
 829                         s->misc_bits += get_bits_diff(s);
 830                     } else {
 831                         if (s->dquant) {
 832                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
 833                             put_qscale(s);
 834                         } else {
 835                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
 836                         }
 837                         s->misc_bits += get_bits_diff(s);
 838                         // RAL: f_code parameter added
 839                         mpeg1_encode_motion(s,
 840                                             motion_x - s->last_mv[0][0][0],
 841                                             s->f_code);
 842                         // RAL: f_code parameter added
 843                         mpeg1_encode_motion(s,
 844                                             motion_y - s->last_mv[0][0][1],
 845                                             s->f_code);
 846                         s->mv_bits += get_bits_diff(s);
 847                     }
 848                 } else {
 849                     put_bits(&s->pb, 3, 1);         /* motion only */
 850                     if (!s->frame_pred_frame_dct)
 851                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
 852                     s->misc_bits += get_bits_diff(s);
 853                     // RAL: f_code parameter added
 854                     mpeg1_encode_motion(s,
 855                                         motion_x - s->last_mv[0][0][0],
 856                                         s->f_code);
 857                     // RAL: f_code parameter added
 858                     mpeg1_encode_motion(s,
 859                                         motion_y - s->last_mv[0][0][1],
 860                                         s->f_code);
 861                     s->qscale  -= s->dquant;
 862                     s->mv_bits += get_bits_diff(s);
 863                 }
 864                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
 865                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
 866             } else {
 867                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
 868
 869                 if (cbp) {
 870                     if (s->dquant) {
 871                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
 872                         put_qscale(s);
 873                     } else {
 874                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
 875                     }
 876                 } else {
 877                     put_bits(&s->pb, 3, 1);             /* motion only */
 878                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
 879                     s->qscale -= s->dquant;
 880                 }
 881                 s->misc_bits += get_bits_diff(s);
 882                 for (i = 0; i < 2; i++) {
 883                     put_bits(&s->pb, 1, s->field_select[0][i]);
 884                     mpeg1_encode_motion(s,
 885                                         s->mv[0][i][0] - s->last_mv[0][i][0],
 886                                         s->f_code);
 887                     mpeg1_encode_motion(s,
 888                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 889                                         s->f_code);
 890                     s->last_mv[0][i][0] = s->mv[0][i][0];
 891                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
 892                 }
 893                 s->mv_bits += get_bits_diff(s);
 894             }
 895             if (cbp) {
 896                 if (s->chroma_y_shift) {
 897                     put_bits(&s->pb,
 898                              ff_mpeg12_mbPatTable[cbp][1],
 899                              ff_mpeg12_mbPatTable[cbp][0]);
 900                 } else {
 901                     put_bits(&s->pb,
 902                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 903                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 904                     put_sbits(&s->pb, 2, cbp);
 905                 }
 906             }
 907             s->f_count++;
 908         } else {
 909             if (s->mv_type == MV_TYPE_16X16) {
 910                 if (cbp) {                      // With coded bloc pattern
 911                     if (s->dquant) {
 912                         if (s->mv_dir == MV_DIR_FORWARD)
 913                             put_mb_modes(s, 6, 3, 1, 0);
 914                         else
 915                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
 916                         put_qscale(s);
 917                     } else {
 918                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
 919                     }
 920                 } else {                        // No coded bloc pattern
 921                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 922                     if (!s->frame_pred_frame_dct)
 923                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
 924                     s->qscale -= s->dquant;
 925                 }
 926                 s->misc_bits += get_bits_diff(s);
 927                 if (s->mv_dir & MV_DIR_FORWARD) {
 928                     mpeg1_encode_motion(s,
 929                                         s->mv[0][0][0] - s->last_mv[0][0][0],
 930                                         s->f_code);
 931                     mpeg1_encode_motion(s,
 932                                         s->mv[0][0][1] - s->last_mv[0][0][1],
 933                                         s->f_code);
 934                     s->last_mv[0][0][0] =
 935                     s->last_mv[0][1][0] = s->mv[0][0][0];
 936                     s->last_mv[0][0][1] =
 937                     s->last_mv[0][1][1] = s->mv[0][0][1];
 938                     s->f_count++;
 939                 }
 940                 if (s->mv_dir & MV_DIR_BACKWARD) {
 941                     mpeg1_encode_motion(s,
 942                                         s->mv[1][0][0] - s->last_mv[1][0][0],
 943                                         s->b_code);
 944                     mpeg1_encode_motion(s,
 945                                         s->mv[1][0][1] - s->last_mv[1][0][1],
 946                                         s->b_code);
 947                     s->last_mv[1][0][0] =
 948                     s->last_mv[1][1][0] = s->mv[1][0][0];
 949                     s->last_mv[1][0][1] =
 950                     s->last_mv[1][1][1] = s->mv[1][0][1];
 951                     s->b_count++;
 952                 }
 953             } else {
 954                 av_assert2(s->mv_type == MV_TYPE_FIELD);
 955                 av_assert2(!s->frame_pred_frame_dct);
 956                 if (cbp) {                      // With coded bloc pattern
 957                     if (s->dquant) {
 958                         if (s->mv_dir == MV_DIR_FORWARD)
 959                             put_mb_modes(s, 6, 3, 1, 1);
 960                         else
 961                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
 962                         put_qscale(s);
 963                     } else {
 964                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
 965                     }
 966                 } else {                        // No coded bloc pattern
 967                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 968                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
 969                     s->qscale -= s->dquant;
 970                 }
 971                 s->misc_bits += get_bits_diff(s);
 972                 if (s->mv_dir & MV_DIR_FORWARD) {
 973                     for (i = 0; i < 2; i++) {
 974                         put_bits(&s->pb, 1, s->field_select[0][i]);
 975                         mpeg1_encode_motion(s,
 976                                             s->mv[0][i][0] - s->last_mv[0][i][0],
 977                                             s->f_code);
 978                         mpeg1_encode_motion(s,
 979                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 980                                             s->f_code);
 981                         s->last_mv[0][i][0] = s->mv[0][i][0];
 982                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
 983                     }
 984                     s->f_count++;
 985                 }
 986                 if (s->mv_dir & MV_DIR_BACKWARD) {
 987                     for (i = 0; i < 2; i++) {
 988                         put_bits(&s->pb, 1, s->field_select[1][i]);
 989                         mpeg1_encode_motion(s,
 990                                             s->mv[1][i][0] - s->last_mv[1][i][0],
 991                                             s->b_code);
 992                         mpeg1_encode_motion(s,
 993                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
 994                                             s->b_code);
 995                         s->last_mv[1][i][0] = s->mv[1][i][0];
 996                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
 997                     }
 998                     s->b_count++;
 999                 }
1000             }
1001             s->mv_bits += get_bits_diff(s);
1002             if (cbp) {
1003                 if (s->chroma_y_shift) {
1004                     put_bits(&s->pb,
1005                              ff_mpeg12_mbPatTable[cbp][1],
1006                              ff_mpeg12_mbPatTable[cbp][0]);
1007                 } else {
1008                     put_bits(&s->pb,
1009                              ff_mpeg12_mbPatTable[cbp >> 2][1],
1010                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
1011                     put_sbits(&s->pb, 2, cbp);
1012                 }
1013             }
1014         }
1015         for (i = 0; i < mb_block_count; i++)
1016             if (cbp & (1 << (mb_block_count - 1 - i)))
1017                 mpeg1_encode_block(s, block[i], i);
1018         s->mb_skip_run = 0;
1019         if (s->mb_intra)
1020             s->i_tex_bits += get_bits_diff(s);
1021         else
1022             s->p_tex_bits += get_bits_diff(s);
1023     }
1024 }
1025
1026 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1027                         int motion_x, int motion_y)
1028 {
1029     if (s->chroma_format == CHROMA_420)
1030         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1031     else
1032         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1033 }
1034
1035 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
1036 {
1037     static int done = 0;
1038
1039     ff_mpeg12_common_init(s);
1040
1041     if (!done) {
1042         int f_code;
1043         int mv;
1044         int i;
1045
1046         done = 1;
1047         ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
1048         ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
1049
1050         for (i = 0; i < 64; i++) {
1051             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1052             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1053         }
1054
1055         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1056         if (s->intra_vlc_format)
1057             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1058
1059         /* build unified dc encoding tables */
1060         for (i = -255; i < 256; i++) {
1061             int adiff, index;
1062             int bits, code;
1063             int diff = i;
1064
1065             adiff = FFABS(diff);
1066             if (diff < 0)
1067                 diff--;
1068             index = av_log2(2 * adiff);
1069
1070             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1071             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1072                     av_mod_uintp2(diff, index);
1073             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1074
1075             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1076             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1077                     av_mod_uintp2(diff, index);
1078             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1079         }
1080
1081         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1082             for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1083                 int len;
1084
1085                 if (mv == 0) {
1086                     len = ff_mpeg12_mbMotionVectorTable[0][1];
1087                 } else {
1088                     int val, bit_size, code;
1089
1090                     bit_size = f_code - 1;
1091
1092                     val = mv;
1093                     if (val < 0)
1094                         val = -val;
1095                     val--;
1096                     code = (val >> bit_size) + 1;
1097                     if (code < 17)
1098                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1099                               1 + bit_size;
1100                     else
1101                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1102                               2 + bit_size;
1103                 }
1104
1105                 mv_penalty[f_code][mv + MAX_DMV] = len;
1106             }
1107
1108
1109         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1110             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1111                 fcode_tab[mv + MAX_MV] = f_code;
1112     }
1113     s->me.mv_penalty = mv_penalty;
1114     s->fcode_tab     = fcode_tab;
1115     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1116         s->min_qcoeff = -255;
1117         s->max_qcoeff = 255;
1118     } else {
1119         s->min_qcoeff = -2047;
1120         s->max_qcoeff = 2047;
1121     }
1122     if (s->intra_vlc_format) {
1123         s->intra_ac_vlc_length      =
1124         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1125     } else {
1126         s->intra_ac_vlc_length      =
1127         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1128     }
1129     s->inter_ac_vlc_length      =
1130     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1131 }
1132
1133 #define OFFSET(x) offsetof(MpegEncContext, x)
1134 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1135 #define COMMON_OPTS                                                           \
1136     { "gop_timecode",        "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.",   \
1137       OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1138     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1139       OFFSET(intra_vlc_format),    AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1140     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1141       OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1142     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1143       OFFSET(scan_offset),         AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1144     { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1145       OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1146
1147 static const AVOption mpeg1_options[] = {
1148     COMMON_OPTS
1149     FF_MPV_COMMON_OPTS
1150     { NULL },
1151 };
1152
1153 static const AVOption mpeg2_options[] = {
1154     COMMON_OPTS
1155     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1156     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1157     { "seq_disp_ext",     "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1158     {     "auto",   NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = -1},  0, 0, VE, "seq_disp_ext" },
1159     {     "never",  NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = 0 },  0, 0, VE, "seq_disp_ext" },
1160     {     "always", NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = 1 },  0, 0, VE, "seq_disp_ext" },
1161     { "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" },
1162     {     "component",    NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_COMPONENT  },  0, 0, VE, "video_format" },
1163     {     "pal",          NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_PAL        },  0, 0, VE, "video_format" },
1164     {     "ntsc",         NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_NTSC       },  0, 0, VE, "video_format" },
1165     {     "secam",        NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_SECAM      },  0, 0, VE, "video_format" },
1166     {     "mac",          NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_MAC        },  0, 0, VE, "video_format" },
1167     {     "unspecified",  NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = VIDEO_FORMAT_UNSPECIFIED},  0, 0, VE, "video_format" },
1168     FF_MPV_COMMON_OPTS
1169     { NULL },
1170 };
1171
1172 #define mpeg12_class(x)                                 \
1173 static const AVClass mpeg ## x ## _class = {            \
1174     .class_name = "mpeg" # x "video encoder",           \
1175     .item_name  = av_default_item_name,                 \
1176     .option     = mpeg ## x ## _options,                \
1177     .version    = LIBAVUTIL_VERSION_INT,                \
1178 };
1179
1180 mpeg12_class(1)
1181 mpeg12_class(2)
1182
1183 AVCodec ff_mpeg1video_encoder = {
1184     .name                 = "mpeg1video",
1185     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1186     .type                 = AVMEDIA_TYPE_VIDEO,
1187     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1188     .priv_data_size       = sizeof(MpegEncContext),
1189     .init                 = encode_init,
1190     .encode2              = ff_mpv_encode_picture,
1191     .close                = ff_mpv_encode_end,
1192     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1193     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1194                                                            AV_PIX_FMT_NONE },
1195     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1196     .priv_class           = &mpeg1_class,
1197 };
1198
1199 AVCodec ff_mpeg2video_encoder = {
1200     .name                 = "mpeg2video",
1201     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1202     .type                 = AVMEDIA_TYPE_VIDEO,
1203     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1204     .priv_data_size       = sizeof(MpegEncContext),
1205     .init                 = encode_init,
1206     .encode2              = ff_mpv_encode_picture,
1207     .close                = ff_mpv_encode_end,
1208     .supported_framerates = ff_mpeg2_frame_rate_tab,
1209     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1210                                                            AV_PIX_FMT_YUV422P,
1211                                                            AV_PIX_FMT_NONE },
1212     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1213     .priv_class           = &mpeg2_class,
1214 };