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   1 /*
   2  * MPEG1/2 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  * MPEG1/2 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 "avcodec.h"
  36 #include "bytestream.h"
  37 #include "mathops.h"
  38 #include "mpeg12.h"
  39 #include "mpeg12data.h"
  40 #include "mpegvideo.h"
  41
  42
  43 static const uint8_t inv_non_linear_qscale[] = {
  44     0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
  45 };
  46
  47 static const uint8_t svcd_scan_offset_placeholder[] = {
  48     0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
  49     0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  50 };
  51
  52 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
  53 static uint8_t fcode_tab[MAX_MV * 2 + 1];
  54
  55 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
  56 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
  57
  58 /* simple include everything table for dc, first byte is bits
  59  * number next 3 are code */
  60 static uint32_t mpeg1_lum_dc_uni[512];
  61 static uint32_t mpeg1_chr_dc_uni[512];
  62
  63 static uint8_t mpeg1_index_run[2][64];
  64 static int8_t  mpeg1_max_level[2][64];
  65
  66 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 (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
 145         avctx->thread_count = 1;
 146
 147     if (ff_MPV_encode_init(avctx) < 0)
 148         return -1;
 149
 150     if (find_frame_rate_index(s) < 0) {
 151         if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
 152             av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
 153                    avctx->time_base.den, avctx->time_base.num);
 154             return -1;
 155         } else {
 156             av_log(avctx, AV_LOG_INFO,
 157                    "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
 158                    avctx->time_base.den, avctx->time_base.num);
 159         }
 160     }
 161
 162     if (avctx->profile == FF_PROFILE_UNKNOWN) {
 163         if (avctx->level != FF_LEVEL_UNKNOWN) {
 164             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
 165             return -1;
 166         }
 167         /* Main or 4:2:2 */
 168         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
 169     }
 170
 171     if (avctx->level == FF_LEVEL_UNKNOWN) {
 172         if (avctx->profile == 0) {                  /* 4:2:2 */
 173             if (avctx->width <= 720 && avctx->height <= 608)
 174                 avctx->level = 5;                   /* Main */
 175             else
 176                 avctx->level = 2;                   /* High */
 177         } else {
 178             if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
 179                 av_log(avctx, AV_LOG_ERROR,
 180                        "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
 181                 return -1;
 182             }
 183             if (avctx->width <= 720 && avctx->height <= 576)
 184                 avctx->level = 8;                   /* Main */
 185             else if (avctx->width <= 1440)
 186                 avctx->level = 6;                   /* High 1440 */
 187             else
 188                 avctx->level = 4;                   /* High */
 189         }
 190     }
 191
 192     if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
 193         av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
 194         return AVERROR(EINVAL);
 195     }
 196
 197     if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
 198         if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
 199             av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiplies of 4096\n"
 200                                         "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
 201             return AVERROR(EINVAL);
 202         }
 203     }
 204
 205     s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
 206     if (s->drop_frame_timecode)
 207         s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
 208     if (s->drop_frame_timecode && s->frame_rate_index != 4) {
 209         av_log(avctx, AV_LOG_ERROR,
 210                "Drop frame time code only allowed with 1001/30000 fps\n");
 211         return -1;
 212     }
 213
 214     if (s->tc_opt_str) {
 215         AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 216         int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
 217         if (ret < 0)
 218             return ret;
 219         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
 220         s->avctx->timecode_frame_start = s->tc.start;
 221     } else {
 222         s->avctx->timecode_frame_start = 0; // default is -1
 223     }
 224     return 0;
 225 }
 226
 227 static void put_header(MpegEncContext *s, int header)
 228 {
 229     avpriv_align_put_bits(&s->pb);
 230     put_bits(&s->pb, 16, header >> 16);
 231     put_sbits(&s->pb, 16, header);
 232 }
 233
 234 /* put sequence header if needed */
 235 static void mpeg1_encode_sequence_header(MpegEncContext *s)
 236 {
 237     unsigned int vbv_buffer_size, fps, v;
 238     int i, constraint_parameter_flag;
 239     uint64_t time_code;
 240     float best_aspect_error = 1E10;
 241     float aspect_ratio      = av_q2d(s->avctx->sample_aspect_ratio);
 242
 243     if (aspect_ratio == 0.0)
 244         aspect_ratio = 1.0;             // pixel aspect 1.1 (VGA)
 245
 246     if (s->current_picture.f.key_frame) {
 247         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 248
 249         /* mpeg1 header repeated every gop */
 250         put_header(s, SEQ_START_CODE);
 251
 252         put_sbits(&s->pb, 12, s->width  & 0xFFF);
 253         put_sbits(&s->pb, 12, s->height & 0xFFF);
 254
 255         for (i = 1; i < 15; i++) {
 256             float error = aspect_ratio;
 257             if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
 258                 error -= 1.0 / ff_mpeg1_aspect[i];
 259             else
 260                 error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
 261
 262             error = FFABS(error);
 263
 264             if (error < best_aspect_error) {
 265                 best_aspect_error    = error;
 266                 s->aspect_ratio_info = i;
 267             }
 268         }
 269
 270         put_bits(&s->pb, 4, s->aspect_ratio_info);
 271         put_bits(&s->pb, 4, s->frame_rate_index);
 272
 273         if (s->avctx->rc_max_rate) {
 274             v = (s->avctx->rc_max_rate + 399) / 400;
 275             if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 276                 v = 0x3ffff;
 277         } else {
 278             v = 0x3FFFF;
 279         }
 280
 281         if (s->avctx->rc_buffer_size)
 282             vbv_buffer_size = s->avctx->rc_buffer_size;
 283         else
 284             /* VBV calculation: Scaled so that a VCD has the proper
 285              * VBV size of 40 kilobytes */
 286             vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
 287         vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
 288
 289         put_sbits(&s->pb, 18, v);
 290         put_bits(&s->pb, 1, 1);         // marker
 291         put_sbits(&s->pb, 10, vbv_buffer_size);
 292
 293         constraint_parameter_flag =
 294             s->width  <= 768                                    &&
 295             s->height <= 576                                    &&
 296             s->mb_width * s->mb_height                 <= 396   &&
 297             s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
 298             framerate.num <= framerate.den * 30                 &&
 299             s->avctx->me_range                                  &&
 300             s->avctx->me_range < 128                            &&
 301             vbv_buffer_size <= 20                               &&
 302             v <= 1856000 / 400                                  &&
 303             s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
 304
 305         put_bits(&s->pb, 1, constraint_parameter_flag);
 306
 307         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
 308         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
 309
 310         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 311             put_header(s, EXT_START_CODE);
 312             put_bits(&s->pb, 4, 1);                 // seq ext
 313
 314             put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
 315
 316             put_bits(&s->pb, 3, s->avctx->profile); // profile
 317             put_bits(&s->pb, 4, s->avctx->level);   // level
 318
 319             put_bits(&s->pb, 1, s->progressive_sequence);
 320             put_bits(&s->pb, 2, s->chroma_format);
 321             put_bits(&s->pb, 2, s->width  >> 12);
 322             put_bits(&s->pb, 2, s->height >> 12);
 323             put_bits(&s->pb, 12, v >> 18);          // bitrate ext
 324             put_bits(&s->pb, 1, 1);                 // marker
 325             put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
 326             put_bits(&s->pb, 1, s->low_delay);
 327             put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
 328             put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
 329         }
 330
 331         put_header(s, GOP_START_CODE);
 332         put_bits(&s->pb, 1, s->drop_frame_timecode);    // drop frame flag
 333         /* time code: we must convert from the real frame rate to a
 334          * fake MPEG frame rate in case of low frame rate */
 335         fps       = (framerate.num + framerate.den / 2) / framerate.den;
 336         time_code = s->current_picture_ptr->f.coded_picture_number +
 337                     s->avctx->timecode_frame_start;
 338
 339         s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
 340
 341         av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
 342         if (s->drop_frame_timecode)
 343             time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
 344
 345         put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
 346         put_bits(&s->pb, 6, (uint32_t)((time_code / (fps *   60)) % 60));
 347         put_bits(&s->pb, 1, 1);
 348         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
 349         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
 350         put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
 351         put_bits(&s->pb, 1, 0);                     // broken link
 352     }
 353 }
 354
 355 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
 356 {
 357     while (run >= 33) {
 358         put_bits(&s->pb, 11, 0x008);
 359         run -= 33;
 360     }
 361     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
 362              ff_mpeg12_mbAddrIncrTable[run][0]);
 363 }
 364
 365 static av_always_inline void put_qscale(MpegEncContext *s)
 366 {
 367     if (s->q_scale_type) {
 368         av_assert2(s->qscale >= 1 && s->qscale <= 12);
 369         put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
 370     } else {
 371         put_bits(&s->pb, 5, s->qscale);
 372     }
 373 }
 374
 375 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
 376 {
 377     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
 378         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
 379         /* slice_vertical_position_extension */
 380         put_bits(&s->pb, 3, s->mb_y >> 7);
 381     } else {
 382         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
 383     }
 384     put_qscale(s);
 385     /* slice extra information */
 386     put_bits(&s->pb, 1, 0);
 387 }
 388
 389 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
 390 {
 391     mpeg1_encode_sequence_header(s);
 392
 393     /* mpeg1 picture header */
 394     put_header(s, PICTURE_START_CODE);
 395     /* temporal reference */
 396
 397     // RAL: s->picture_number instead of s->fake_picture_number
 398     put_bits(&s->pb, 10,
 399              (s->picture_number - s->gop_picture_number) & 0x3ff);
 400     put_bits(&s->pb, 3, s->pict_type);
 401
 402     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
 403     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
 404
 405     // RAL: Forward f_code also needed for B-frames
 406     if (s->pict_type == AV_PICTURE_TYPE_P ||
 407         s->pict_type == AV_PICTURE_TYPE_B) {
 408         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 409         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 410             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
 411         else
 412             put_bits(&s->pb, 3, 7);             /* forward_f_code */
 413     }
 414
 415     // RAL: Backward f_code necessary for B-frames
 416     if (s->pict_type == AV_PICTURE_TYPE_B) {
 417         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 418         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 419             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
 420         else
 421             put_bits(&s->pb, 3, 7);             /* backward_f_code */
 422     }
 423
 424     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
 425
 426     s->frame_pred_frame_dct = 1;
 427     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 428         put_header(s, EXT_START_CODE);
 429         put_bits(&s->pb, 4, 8);                 /* pic ext */
 430         if (s->pict_type == AV_PICTURE_TYPE_P ||
 431             s->pict_type == AV_PICTURE_TYPE_B) {
 432             put_bits(&s->pb, 4, s->f_code);
 433             put_bits(&s->pb, 4, s->f_code);
 434         } else {
 435             put_bits(&s->pb, 8, 255);
 436         }
 437         if (s->pict_type == AV_PICTURE_TYPE_B) {
 438             put_bits(&s->pb, 4, s->b_code);
 439             put_bits(&s->pb, 4, s->b_code);
 440         } else {
 441             put_bits(&s->pb, 8, 255);
 442         }
 443         put_bits(&s->pb, 2, s->intra_dc_precision);
 444
 445         av_assert0(s->picture_structure == PICT_FRAME);
 446         put_bits(&s->pb, 2, s->picture_structure);
 447         if (s->progressive_sequence)
 448             put_bits(&s->pb, 1, 0);             /* no repeat */
 449         else
 450             put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
 451         /* XXX: optimize the generation of this flag with entropy measures */
 452         s->frame_pred_frame_dct = s->progressive_sequence;
 453
 454         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
 455         put_bits(&s->pb, 1, s->concealment_motion_vectors);
 456         put_bits(&s->pb, 1, s->q_scale_type);
 457         put_bits(&s->pb, 1, s->intra_vlc_format);
 458         put_bits(&s->pb, 1, s->alternate_scan);
 459         put_bits(&s->pb, 1, s->repeat_first_field);
 460         s->progressive_frame = s->progressive_sequence;
 461         /* chroma_420_type */
 462         put_bits(&s->pb, 1, s->chroma_format ==
 463                             CHROMA_420 ? s->progressive_frame : 0);
 464         put_bits(&s->pb, 1, s->progressive_frame);
 465         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
 466     }
 467     if (s->scan_offset) {
 468         int i;
 469
 470         put_header(s, USER_START_CODE);
 471         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
 472             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
 473     }
 474
 475     s->mb_y = 0;
 476     ff_mpeg1_encode_slice_header(s);
 477 }
 478
 479 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
 480                                 int has_mv, int field_motion)
 481 {
 482     put_bits(&s->pb, n, bits);
 483     if (!s->frame_pred_frame_dct) {
 484         if (has_mv)
 485             /* motion_type: frame/field */
 486             put_bits(&s->pb, 2, 2 - field_motion);
 487         put_bits(&s->pb, 1, s->interlaced_dct);
 488     }
 489 }
 490
 491 // RAL: Parameter added: f_or_b_code
 492 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
 493 {
 494     if (val == 0) {
 495         /* zero vector */
 496         put_bits(&s->pb,
 497                  ff_mpeg12_mbMotionVectorTable[0][1],
 498                  ff_mpeg12_mbMotionVectorTable[0][0]);
 499     } else {
 500         int code, sign, bits;
 501         int bit_size = f_or_b_code - 1;
 502         int range    = 1 << bit_size;
 503         /* modulo encoding */
 504         val = sign_extend(val, 5 + bit_size);
 505
 506         if (val >= 0) {
 507             val--;
 508             code = (val >> bit_size) + 1;
 509             bits = val & (range - 1);
 510             sign = 0;
 511         } else {
 512             val = -val;
 513             val--;
 514             code = (val >> bit_size) + 1;
 515             bits = val & (range - 1);
 516             sign = 1;
 517         }
 518
 519         av_assert2(code > 0 && code <= 16);
 520
 521         put_bits(&s->pb,
 522                  ff_mpeg12_mbMotionVectorTable[code][1],
 523                  ff_mpeg12_mbMotionVectorTable[code][0]);
 524
 525         put_bits(&s->pb, 1, sign);
 526         if (bit_size > 0)
 527             put_bits(&s->pb, bit_size, bits);
 528     }
 529 }
 530
 531 static inline void encode_dc(MpegEncContext *s, int diff, int component)
 532 {
 533     if (((unsigned) (diff + 255)) >= 511) {
 534         int index;
 535
 536         if (diff < 0) {
 537             index = av_log2_16bit(-2 * diff);
 538             diff--;
 539         } else {
 540             index = av_log2_16bit(2 * diff);
 541         }
 542         if (component == 0)
 543             put_bits(&s->pb,
 544                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
 545                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 546                      (diff & ((1 << index) - 1)));
 547         else
 548             put_bits(&s->pb,
 549                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
 550                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 551                      (diff & ((1 << index) - 1)));
 552     } else {
 553         if (component == 0)
 554             put_bits(&s->pb,
 555                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
 556                      mpeg1_lum_dc_uni[diff + 255] >> 8);
 557         else
 558             put_bits(&s->pb,
 559                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
 560                      mpeg1_chr_dc_uni[diff + 255] >> 8);
 561     }
 562 }
 563
 564 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
 565 {
 566     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
 567     int code, component;
 568     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
 569
 570     last_index = s->block_last_index[n];
 571
 572     /* DC coef */
 573     if (s->mb_intra) {
 574         component = (n <= 3 ? 0 : (n & 1) + 1);
 575         dc        = block[0];                   /* overflow is impossible */
 576         diff      = dc - s->last_dc[component];
 577         encode_dc(s, diff, component);
 578         s->last_dc[component] = dc;
 579         i = 1;
 580         if (s->intra_vlc_format)
 581             table_vlc = ff_rl_mpeg2.table_vlc;
 582     } else {
 583         /* encode the first coefficient: needs to be done here because
 584          * it is handled slightly differently */
 585         level = block[0];
 586         if (abs(level) == 1) {
 587             code = ((uint32_t)level >> 31);     /* the sign bit */
 588             put_bits(&s->pb, 2, code | 0x02);
 589             i = 1;
 590         } else {
 591             i             = 0;
 592             last_non_zero = -1;
 593             goto next_coef;
 594         }
 595     }
 596
 597     /* now quantify & encode AC coefs */
 598     last_non_zero = i - 1;
 599
 600     for (; i <= last_index; i++) {
 601         j     = s->intra_scantable.permutated[i];
 602         level = block[j];
 603
 604 next_coef:
 605         /* encode using VLC */
 606         if (level != 0) {
 607             run = i - last_non_zero - 1;
 608
 609             alevel = level;
 610             MASK_ABS(sign, alevel);
 611             sign &= 1;
 612
 613             if (alevel <= mpeg1_max_level[0][run]) {
 614                 code = mpeg1_index_run[0][run] + alevel - 1;
 615                 /* store the VLC & sign at once */
 616                 put_bits(&s->pb, table_vlc[code][1] + 1,
 617                          (table_vlc[code][0] << 1) + sign);
 618             } else {
 619                 /* escape seems to be pretty rare <5% so I do not optimize it */
 620                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
 621                 /* escape: only clip in this case */
 622                 put_bits(&s->pb, 6, run);
 623                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
 624                     if (alevel < 128) {
 625                         put_sbits(&s->pb, 8, level);
 626                     } else {
 627                         if (level < 0)
 628                             put_bits(&s->pb, 16, 0x8001 + level + 255);
 629                         else
 630                             put_sbits(&s->pb, 16, level);
 631                     }
 632                 } else {
 633                     put_sbits(&s->pb, 12, level);
 634                 }
 635             }
 636             last_non_zero = i;
 637         }
 638     }
 639     /* end of block */
 640     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
 641 }
 642
 643 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
 644                                                       int16_t block[6][64],
 645                                                       int motion_x, int motion_y,
 646                                                       int mb_block_count)
 647 {
 648     int i, cbp;
 649     const int mb_x     = s->mb_x;
 650     const int mb_y     = s->mb_y;
 651     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
 652
 653     /* compute cbp */
 654     cbp = 0;
 655     for (i = 0; i < mb_block_count; i++)
 656         if (s->block_last_index[i] >= 0)
 657             cbp |= 1 << (mb_block_count - 1 - i);
 658
 659     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
 660         (mb_x != s->mb_width - 1 ||
 661          (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
 662         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
 663          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
 664           (((s->mv_dir & MV_DIR_FORWARD)
 665             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
 666                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
 667            ((s->mv_dir & MV_DIR_BACKWARD)
 668             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
 669                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
 670         s->mb_skip_run++;
 671         s->qscale -= s->dquant;
 672         s->skip_count++;
 673         s->misc_bits++;
 674         s->last_bits++;
 675         if (s->pict_type == AV_PICTURE_TYPE_P) {
 676             s->last_mv[0][0][0] =
 677             s->last_mv[0][0][1] =
 678             s->last_mv[0][1][0] =
 679             s->last_mv[0][1][1] = 0;
 680         }
 681     } else {
 682         if (first_mb) {
 683             av_assert0(s->mb_skip_run == 0);
 684             encode_mb_skip_run(s, s->mb_x);
 685         } else {
 686             encode_mb_skip_run(s, s->mb_skip_run);
 687         }
 688
 689         if (s->pict_type == AV_PICTURE_TYPE_I) {
 690             if (s->dquant && cbp) {
 691                 /* macroblock_type: macroblock_quant = 1 */
 692                 put_mb_modes(s, 2, 1, 0, 0);
 693                 put_qscale(s);
 694             } else {
 695                 /* macroblock_type: macroblock_quant = 0 */
 696                 put_mb_modes(s, 1, 1, 0, 0);
 697                 s->qscale -= s->dquant;
 698             }
 699             s->misc_bits += get_bits_diff(s);
 700             s->i_count++;
 701         } else if (s->mb_intra) {
 702             if (s->dquant && cbp) {
 703                 put_mb_modes(s, 6, 0x01, 0, 0);
 704                 put_qscale(s);
 705             } else {
 706                 put_mb_modes(s, 5, 0x03, 0, 0);
 707                 s->qscale -= s->dquant;
 708             }
 709             s->misc_bits += get_bits_diff(s);
 710             s->i_count++;
 711             memset(s->last_mv, 0, sizeof(s->last_mv));
 712         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
 713             if (s->mv_type == MV_TYPE_16X16) {
 714                 if (cbp != 0) {
 715                     if ((motion_x | motion_y) == 0) {
 716                         if (s->dquant) {
 717                             /* macroblock_pattern & quant */
 718                             put_mb_modes(s, 5, 1, 0, 0);
 719                             put_qscale(s);
 720                         } else {
 721                             /* macroblock_pattern only */
 722                             put_mb_modes(s, 2, 1, 0, 0);
 723                         }
 724                         s->misc_bits += get_bits_diff(s);
 725                     } else {
 726                         if (s->dquant) {
 727                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
 728                             put_qscale(s);
 729                         } else {
 730                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
 731                         }
 732                         s->misc_bits += get_bits_diff(s);
 733                         // RAL: f_code parameter added
 734                         mpeg1_encode_motion(s,
 735                                             motion_x - s->last_mv[0][0][0],
 736                                             s->f_code);
 737                         // RAL: f_code parameter added
 738                         mpeg1_encode_motion(s,
 739                                             motion_y - s->last_mv[0][0][1],
 740                                             s->f_code);
 741                         s->mv_bits += get_bits_diff(s);
 742                     }
 743                 } else {
 744                     put_bits(&s->pb, 3, 1);         /* motion only */
 745                     if (!s->frame_pred_frame_dct)
 746                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
 747                     s->misc_bits += get_bits_diff(s);
 748                     // RAL: f_code parameter added
 749                     mpeg1_encode_motion(s,
 750                                         motion_x - s->last_mv[0][0][0],
 751                                         s->f_code);
 752                     // RAL: f_code parameter added
 753                     mpeg1_encode_motion(s,
 754                                         motion_y - s->last_mv[0][0][1],
 755                                         s->f_code);
 756                     s->qscale  -= s->dquant;
 757                     s->mv_bits += get_bits_diff(s);
 758                 }
 759                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
 760                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
 761             } else {
 762                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
 763
 764                 if (cbp) {
 765                     if (s->dquant) {
 766                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
 767                         put_qscale(s);
 768                     } else {
 769                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
 770                     }
 771                 } else {
 772                     put_bits(&s->pb, 3, 1);             /* motion only */
 773                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
 774                     s->qscale -= s->dquant;
 775                 }
 776                 s->misc_bits += get_bits_diff(s);
 777                 for (i = 0; i < 2; i++) {
 778                     put_bits(&s->pb, 1, s->field_select[0][i]);
 779                     mpeg1_encode_motion(s,
 780                                         s->mv[0][i][0] - s->last_mv[0][i][0],
 781                                         s->f_code);
 782                     mpeg1_encode_motion(s,
 783                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 784                                         s->f_code);
 785                     s->last_mv[0][i][0] = s->mv[0][i][0];
 786                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
 787                 }
 788                 s->mv_bits += get_bits_diff(s);
 789             }
 790             if (cbp) {
 791                 if (s->chroma_y_shift) {
 792                     put_bits(&s->pb,
 793                              ff_mpeg12_mbPatTable[cbp][1],
 794                              ff_mpeg12_mbPatTable[cbp][0]);
 795                 } else {
 796                     put_bits(&s->pb,
 797                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 798                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 799                     put_sbits(&s->pb, 2, cbp);
 800                 }
 801             }
 802             s->f_count++;
 803         } else {
 804             if (s->mv_type == MV_TYPE_16X16) {
 805                 if (cbp) {                      // With coded bloc pattern
 806                     if (s->dquant) {
 807                         if (s->mv_dir == MV_DIR_FORWARD)
 808                             put_mb_modes(s, 6, 3, 1, 0);
 809                         else
 810                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
 811                         put_qscale(s);
 812                     } else {
 813                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
 814                     }
 815                 } else {                        // No coded bloc pattern
 816                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 817                     if (!s->frame_pred_frame_dct)
 818                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
 819                     s->qscale -= s->dquant;
 820                 }
 821                 s->misc_bits += get_bits_diff(s);
 822                 if (s->mv_dir & MV_DIR_FORWARD) {
 823                     mpeg1_encode_motion(s,
 824                                         s->mv[0][0][0] - s->last_mv[0][0][0],
 825                                         s->f_code);
 826                     mpeg1_encode_motion(s,
 827                                         s->mv[0][0][1] - s->last_mv[0][0][1],
 828                                         s->f_code);
 829                     s->last_mv[0][0][0] =
 830                     s->last_mv[0][1][0] = s->mv[0][0][0];
 831                     s->last_mv[0][0][1] =
 832                     s->last_mv[0][1][1] = s->mv[0][0][1];
 833                     s->f_count++;
 834                 }
 835                 if (s->mv_dir & MV_DIR_BACKWARD) {
 836                     mpeg1_encode_motion(s,
 837                                         s->mv[1][0][0] - s->last_mv[1][0][0],
 838                                         s->b_code);
 839                     mpeg1_encode_motion(s,
 840                                         s->mv[1][0][1] - s->last_mv[1][0][1],
 841                                         s->b_code);
 842                     s->last_mv[1][0][0] =
 843                     s->last_mv[1][1][0] = s->mv[1][0][0];
 844                     s->last_mv[1][0][1] =
 845                     s->last_mv[1][1][1] = s->mv[1][0][1];
 846                     s->b_count++;
 847                 }
 848             } else {
 849                 av_assert2(s->mv_type == MV_TYPE_FIELD);
 850                 av_assert2(!s->frame_pred_frame_dct);
 851                 if (cbp) {                      // With coded bloc pattern
 852                     if (s->dquant) {
 853                         if (s->mv_dir == MV_DIR_FORWARD)
 854                             put_mb_modes(s, 6, 3, 1, 1);
 855                         else
 856                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
 857                         put_qscale(s);
 858                     } else {
 859                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
 860                     }
 861                 } else {                        // No coded bloc pattern
 862                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 863                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
 864                     s->qscale -= s->dquant;
 865                 }
 866                 s->misc_bits += get_bits_diff(s);
 867                 if (s->mv_dir & MV_DIR_FORWARD) {
 868                     for (i = 0; i < 2; i++) {
 869                         put_bits(&s->pb, 1, s->field_select[0][i]);
 870                         mpeg1_encode_motion(s,
 871                                             s->mv[0][i][0] - s->last_mv[0][i][0],
 872                                             s->f_code);
 873                         mpeg1_encode_motion(s,
 874                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 875                                             s->f_code);
 876                         s->last_mv[0][i][0] = s->mv[0][i][0];
 877                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
 878                     }
 879                     s->f_count++;
 880                 }
 881                 if (s->mv_dir & MV_DIR_BACKWARD) {
 882                     for (i = 0; i < 2; i++) {
 883                         put_bits(&s->pb, 1, s->field_select[1][i]);
 884                         mpeg1_encode_motion(s,
 885                                             s->mv[1][i][0] - s->last_mv[1][i][0],
 886                                             s->b_code);
 887                         mpeg1_encode_motion(s,
 888                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
 889                                             s->b_code);
 890                         s->last_mv[1][i][0] = s->mv[1][i][0];
 891                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
 892                     }
 893                     s->b_count++;
 894                 }
 895             }
 896             s->mv_bits += get_bits_diff(s);
 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         }
 910         for (i = 0; i < mb_block_count; i++)
 911             if (cbp & (1 << (mb_block_count - 1 - i)))
 912                 mpeg1_encode_block(s, block[i], i);
 913         s->mb_skip_run = 0;
 914         if (s->mb_intra)
 915             s->i_tex_bits += get_bits_diff(s);
 916         else
 917             s->p_tex_bits += get_bits_diff(s);
 918     }
 919 }
 920
 921 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
 922                         int motion_x, int motion_y)
 923 {
 924     if (s->chroma_format == CHROMA_420)
 925         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
 926     else
 927         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
 928 }
 929
 930 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
 931 {
 932     static int done = 0;
 933
 934     ff_mpeg12_common_init(s);
 935
 936     if (!done) {
 937         int f_code;
 938         int mv;
 939         int i;
 940
 941         done = 1;
 942         ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
 943         ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
 944
 945         for (i = 0; i < 64; i++) {
 946             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
 947             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
 948         }
 949
 950         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
 951         if (s->intra_vlc_format)
 952             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
 953
 954         /* build unified dc encoding tables */
 955         for (i = -255; i < 256; i++) {
 956             int adiff, index;
 957             int bits, code;
 958             int diff = i;
 959
 960             adiff = FFABS(diff);
 961             if (diff < 0)
 962                 diff--;
 963             index = av_log2(2 * adiff);
 964
 965             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
 966             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 967                    (diff & ((1 << index) - 1));
 968             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
 969
 970             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
 971             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 972                    (diff & ((1 << index) - 1));
 973             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
 974         }
 975
 976         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
 977             for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
 978                 int len;
 979
 980                 if (mv == 0) {
 981                     len = ff_mpeg12_mbMotionVectorTable[0][1];
 982                 } else {
 983                     int val, bit_size, code;
 984
 985                     bit_size = f_code - 1;
 986
 987                     val = mv;
 988                     if (val < 0)
 989                         val = -val;
 990                     val--;
 991                     code = (val >> bit_size) + 1;
 992                     if (code < 17)
 993                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
 994                               1 + bit_size;
 995                     else
 996                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
 997                               2 + bit_size;
 998                 }
 999
1000                 mv_penalty[f_code][mv + MAX_MV] = len;
1001             }
1002
1003
1004         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1005             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1006                 fcode_tab[mv + MAX_MV] = f_code;
1007     }
1008     s->me.mv_penalty = mv_penalty;
1009     s->fcode_tab     = fcode_tab;
1010     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1011         s->min_qcoeff = -255;
1012         s->max_qcoeff = 255;
1013     } else {
1014         s->min_qcoeff = -2047;
1015         s->max_qcoeff = 2047;
1016     }
1017     if (s->intra_vlc_format) {
1018         s->intra_ac_vlc_length      =
1019         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1020     } else {
1021         s->intra_ac_vlc_length      =
1022         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1023     }
1024     s->inter_ac_vlc_length      =
1025     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1026 }
1027
1028 #define OFFSET(x) offsetof(MpegEncContext, x)
1029 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1030 #define COMMON_OPTS                                                           \
1031     { "gop_timecode",        "MPEG GOP Timecode in hh:mm:ss[:;.]ff format",   \
1032       OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1033     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1034       OFFSET(intra_vlc_format),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1035     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1036       OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1037     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1038       OFFSET(scan_offset),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1039
1040 static const AVOption mpeg1_options[] = {
1041     COMMON_OPTS
1042     FF_MPV_COMMON_OPTS
1043     { NULL },
1044 };
1045
1046 static const AVOption mpeg2_options[] = {
1047     COMMON_OPTS
1048     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1049     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1050     FF_MPV_COMMON_OPTS
1051     { NULL },
1052 };
1053
1054 #define mpeg12_class(x)                                 \
1055 static const AVClass mpeg ## x ## _class = {            \
1056     .class_name = "mpeg" # x "video encoder",           \
1057     .item_name  = av_default_item_name,                 \
1058     .option     = mpeg ## x ## _options,                \
1059     .version    = LIBAVUTIL_VERSION_INT,                \
1060 };
1061
1062 mpeg12_class(1)
1063 mpeg12_class(2)
1064
1065 AVCodec ff_mpeg1video_encoder = {
1066     .name                 = "mpeg1video",
1067     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1068     .type                 = AVMEDIA_TYPE_VIDEO,
1069     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1070     .priv_data_size       = sizeof(MpegEncContext),
1071     .init                 = encode_init,
1072     .encode2              = ff_MPV_encode_picture,
1073     .close                = ff_MPV_encode_end,
1074     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1075     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1076                                                            AV_PIX_FMT_NONE },
1077     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1078     .priv_class           = &mpeg1_class,
1079 };
1080
1081 AVCodec ff_mpeg2video_encoder = {
1082     .name                 = "mpeg2video",
1083     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1084     .type                 = AVMEDIA_TYPE_VIDEO,
1085     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1086     .priv_data_size       = sizeof(MpegEncContext),
1087     .init                 = encode_init,
1088     .encode2              = ff_MPV_encode_picture,
1089     .close                = ff_MPV_encode_end,
1090     .supported_framerates = ff_mpeg2_frame_rate_tab,
1091     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1092                                                            AV_PIX_FMT_YUV422P,
1093                                                            AV_PIX_FMT_NONE },
1094     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1095     .priv_class           = &mpeg2_class,
1096 };