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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 "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 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
  65 {
  66     int i;
  67
  68     for (i = 0; i < 128; i++) {
  69         int level = i - 64;
  70         int run;
  71         if (!level)
  72             continue;
  73         for (run = 0; run < 64; run++) {
  74             int len, code;
  75             int alevel = FFABS(level);
  76
  77             if (alevel > rl->max_level[0][run])
  78                 code = 111;                         /* rl->n */
  79             else
  80                 code = rl->index_run[0][run] + alevel - 1;
  81
  82             if (code < 111) {                       /* rl->n */
  83                 /* length of VLC and sign */
  84                 len = rl->table_vlc[code][1] + 1;
  85             } else {
  86                 len = rl->table_vlc[111 /* rl->n */][1] + 6;
  87
  88                 if (alevel < 128)
  89                     len += 8;
  90                 else
  91                     len += 16;
  92             }
  93
  94             uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
  95         }
  96     }
  97 }
  98
  99 static int find_frame_rate_index(MpegEncContext *s)
 100 {
 101     int i;
 102     AVRational bestq = (AVRational) {0, 0};
 103     AVRational ext;
 104     AVRational target = av_inv_q(s->avctx->time_base);
 105
 106     for (i = 1; i < 14; i++) {
 107         if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
 108             i >= 9)
 109             break;
 110
 111         for (ext.num=1; ext.num <= 4; ext.num++) {
 112             for (ext.den=1; ext.den <= 32; ext.den++) {
 113                 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
 114
 115                 if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
 116                     continue;
 117                 if (av_gcd(ext.den, ext.num) != 1)
 118                     continue;
 119
 120                 if (    bestq.num==0
 121                     || av_nearer_q(target, bestq, q) < 0
 122                     || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
 123                     bestq               = q;
 124                     s->frame_rate_index = i;
 125                     s->mpeg2_frame_rate_ext.num = ext.num;
 126                     s->mpeg2_frame_rate_ext.den = ext.den;
 127                 }
 128             }
 129         }
 130     }
 131
 132     if (av_cmp_q(target, bestq))
 133         return -1;
 134     else
 135         return 0;
 136 }
 137
 138 static av_cold int encode_init(AVCodecContext *avctx)
 139 {
 140     MpegEncContext *s = avctx->priv_data;
 141
 142     if (ff_mpv_encode_init(avctx) < 0)
 143         return -1;
 144
 145     if (find_frame_rate_index(s) < 0) {
 146         if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
 147             av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
 148                    avctx->time_base.den, avctx->time_base.num);
 149             return -1;
 150         } else {
 151             av_log(avctx, AV_LOG_INFO,
 152                    "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
 153                    avctx->time_base.den, avctx->time_base.num);
 154         }
 155     }
 156
 157     if (avctx->profile == FF_PROFILE_UNKNOWN) {
 158         if (avctx->level != FF_LEVEL_UNKNOWN) {
 159             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
 160             return -1;
 161         }
 162         /* Main or 4:2:2 */
 163         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
 164     }
 165
 166     if (avctx->level == FF_LEVEL_UNKNOWN) {
 167         if (avctx->profile == 0) {                  /* 4:2:2 */
 168             if (avctx->width <= 720 && avctx->height <= 608)
 169                 avctx->level = 5;                   /* Main */
 170             else
 171                 avctx->level = 2;                   /* High */
 172         } else {
 173             if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
 174                 av_log(avctx, AV_LOG_ERROR,
 175                        "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
 176                 return -1;
 177             }
 178             if (avctx->width <= 720 && avctx->height <= 576)
 179                 avctx->level = 8;                   /* Main */
 180             else if (avctx->width <= 1440)
 181                 avctx->level = 6;                   /* High 1440 */
 182             else
 183                 avctx->level = 4;                   /* High */
 184         }
 185     }
 186
 187     if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
 188         av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
 189         return AVERROR(EINVAL);
 190     }
 191
 192     if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
 193         if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
 194             av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
 195                                         "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
 196             return AVERROR(EINVAL);
 197         }
 198     }
 199
 200     s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
 201     if (s->drop_frame_timecode)
 202         s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
 203     if (s->drop_frame_timecode && s->frame_rate_index != 4) {
 204         av_log(avctx, AV_LOG_ERROR,
 205                "Drop frame time code only allowed with 1001/30000 fps\n");
 206         return -1;
 207     }
 208
 209     if (s->tc_opt_str) {
 210         AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 211         int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
 212         if (ret < 0)
 213             return ret;
 214         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
 215         s->avctx->timecode_frame_start = s->tc.start;
 216     } else {
 217         s->avctx->timecode_frame_start = 0; // default is -1
 218     }
 219     return 0;
 220 }
 221
 222 static void put_header(MpegEncContext *s, int header)
 223 {
 224     avpriv_align_put_bits(&s->pb);
 225     put_bits(&s->pb, 16, header >> 16);
 226     put_sbits(&s->pb, 16, header);
 227 }
 228
 229 /* put sequence header if needed */
 230 static void mpeg1_encode_sequence_header(MpegEncContext *s)
 231 {
 232     unsigned int vbv_buffer_size, fps, v;
 233     int i, constraint_parameter_flag;
 234     uint64_t time_code;
 235     int64_t best_aspect_error = INT64_MAX;
 236     AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
 237
 238     if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
 239         aspect_ratio = (AVRational){1,1};             // pixel aspect 1.1 (VGA)
 240
 241     if (s->current_picture.f->key_frame) {
 242         AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
 243
 244         /* mpeg1 header repeated every gop */
 245         put_header(s, SEQ_START_CODE);
 246
 247         put_sbits(&s->pb, 12, s->width  & 0xFFF);
 248         put_sbits(&s->pb, 12, s->height & 0xFFF);
 249
 250         for (i = 1; i < 15; i++) {
 251             int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
 252             if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
 253                 error -= (1LL<<32) / ff_mpeg1_aspect[i];
 254             else
 255                 error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
 256
 257             error = FFABS(error);
 258
 259             if (error - 2 <= best_aspect_error) {
 260                 best_aspect_error    = error;
 261                 s->aspect_ratio_info = i;
 262             }
 263         }
 264
 265         put_bits(&s->pb, 4, s->aspect_ratio_info);
 266         put_bits(&s->pb, 4, s->frame_rate_index);
 267
 268         if (s->avctx->rc_max_rate) {
 269             v = (s->avctx->rc_max_rate + 399) / 400;
 270             if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 271                 v = 0x3ffff;
 272         } else {
 273             v = 0x3FFFF;
 274         }
 275
 276         if (s->avctx->rc_buffer_size)
 277             vbv_buffer_size = s->avctx->rc_buffer_size;
 278         else
 279             /* VBV calculation: Scaled so that a VCD has the proper
 280              * VBV size of 40 kilobytes */
 281             vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
 282         vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
 283
 284         put_sbits(&s->pb, 18, v);
 285         put_bits(&s->pb, 1, 1);         // marker
 286         put_sbits(&s->pb, 10, vbv_buffer_size);
 287
 288         constraint_parameter_flag =
 289             s->width  <= 768                                    &&
 290             s->height <= 576                                    &&
 291             s->mb_width * s->mb_height                 <= 396   &&
 292             s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
 293             framerate.num <= framerate.den * 30                 &&
 294             s->avctx->me_range                                  &&
 295             s->avctx->me_range < 128                            &&
 296             vbv_buffer_size <= 20                               &&
 297             v <= 1856000 / 400                                  &&
 298             s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
 299
 300         put_bits(&s->pb, 1, constraint_parameter_flag);
 301
 302         ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
 303         ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
 304
 305         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 306             AVFrameSideData *side_data;
 307             int width = s->width;
 308             int height = s->height;
 309             int use_seq_disp_ext;
 310
 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             side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
 331             if (side_data) {
 332                 AVPanScan *pan_scan = (AVPanScan *)side_data->data;
 333                 if (pan_scan->width && pan_scan->height) {
 334                     width = pan_scan->width >> 4;
 335                     height = pan_scan->height >> 4;
 336                 }
 337             }
 338
 339             use_seq_disp_ext = (width != s->width ||
 340                                 height != s->height ||
 341                                 s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 342                                 s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
 343                                 s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED);
 344
 345             if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
 346                 put_header(s, EXT_START_CODE);
 347                 put_bits(&s->pb, 4, 2);                         // sequence display extension
 348                 put_bits(&s->pb, 3, 0);                         // video_format: 0 is components
 349                 put_bits(&s->pb, 1, 1);                         // colour_description
 350                 put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
 351                 put_bits(&s->pb, 8, s->avctx->color_trc);       // transfer_characteristics
 352                 put_bits(&s->pb, 8, s->avctx->colorspace);      // matrix_coefficients
 353                 put_bits(&s->pb, 14, width);                    // display_horizontal_size
 354                 put_bits(&s->pb, 1, 1);                         // marker_bit
 355                 put_bits(&s->pb, 14, height);                   // display_vertical_size
 356                 put_bits(&s->pb, 3, 0);                         // remaining 3 bits are zero padding
 357             }
 358         }
 359
 360         put_header(s, GOP_START_CODE);
 361         put_bits(&s->pb, 1, s->drop_frame_timecode);    // drop frame flag
 362         /* time code: we must convert from the real frame rate to a
 363          * fake MPEG frame rate in case of low frame rate */
 364         fps       = (framerate.num + framerate.den / 2) / framerate.den;
 365         time_code = s->current_picture_ptr->f->coded_picture_number +
 366                     s->avctx->timecode_frame_start;
 367
 368         s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
 369
 370         av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
 371         if (s->drop_frame_timecode)
 372             time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
 373
 374         put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
 375         put_bits(&s->pb, 6, (uint32_t)((time_code / (fps *   60)) % 60));
 376         put_bits(&s->pb, 1, 1);
 377         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
 378         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
 379         put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only || !s->gop_picture_number);
 380         put_bits(&s->pb, 1, 0);                     // broken link
 381     }
 382 }
 383
 384 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
 385 {
 386     while (run >= 33) {
 387         put_bits(&s->pb, 11, 0x008);
 388         run -= 33;
 389     }
 390     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
 391              ff_mpeg12_mbAddrIncrTable[run][0]);
 392 }
 393
 394 static av_always_inline void put_qscale(MpegEncContext *s)
 395 {
 396     put_bits(&s->pb, 5, s->qscale);
 397 }
 398
 399 void ff_mpeg1_encode_slice_header(MpegEncContext *s)
 400 {
 401     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
 402         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
 403         /* slice_vertical_position_extension */
 404         put_bits(&s->pb, 3, s->mb_y >> 7);
 405     } else {
 406         put_header(s, SLICE_MIN_START_CODE + s->mb_y);
 407     }
 408     put_qscale(s);
 409     /* slice extra information */
 410     put_bits(&s->pb, 1, 0);
 411 }
 412
 413 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
 414 {
 415     AVFrameSideData *side_data;
 416     mpeg1_encode_sequence_header(s);
 417
 418     /* mpeg1 picture header */
 419     put_header(s, PICTURE_START_CODE);
 420     /* temporal reference */
 421
 422     // RAL: s->picture_number instead of s->fake_picture_number
 423     put_bits(&s->pb, 10,
 424              (s->picture_number - s->gop_picture_number) & 0x3ff);
 425     put_bits(&s->pb, 3, s->pict_type);
 426
 427     s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
 428     put_bits(&s->pb, 16, 0xFFFF);               /* vbv_delay */
 429
 430     // RAL: Forward f_code also needed for B-frames
 431     if (s->pict_type == AV_PICTURE_TYPE_P ||
 432         s->pict_type == AV_PICTURE_TYPE_B) {
 433         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 434         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 435             put_bits(&s->pb, 3, s->f_code);     /* forward_f_code */
 436         else
 437             put_bits(&s->pb, 3, 7);             /* forward_f_code */
 438     }
 439
 440     // RAL: Backward f_code necessary for B-frames
 441     if (s->pict_type == AV_PICTURE_TYPE_B) {
 442         put_bits(&s->pb, 1, 0);                 /* half pel coordinates */
 443         if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
 444             put_bits(&s->pb, 3, s->b_code);     /* backward_f_code */
 445         else
 446             put_bits(&s->pb, 3, 7);             /* backward_f_code */
 447     }
 448
 449     put_bits(&s->pb, 1, 0);                     /* extra bit picture */
 450
 451     s->frame_pred_frame_dct = 1;
 452     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
 453         put_header(s, EXT_START_CODE);
 454         put_bits(&s->pb, 4, 8);                 /* pic ext */
 455         if (s->pict_type == AV_PICTURE_TYPE_P ||
 456             s->pict_type == AV_PICTURE_TYPE_B) {
 457             put_bits(&s->pb, 4, s->f_code);
 458             put_bits(&s->pb, 4, s->f_code);
 459         } else {
 460             put_bits(&s->pb, 8, 255);
 461         }
 462         if (s->pict_type == AV_PICTURE_TYPE_B) {
 463             put_bits(&s->pb, 4, s->b_code);
 464             put_bits(&s->pb, 4, s->b_code);
 465         } else {
 466             put_bits(&s->pb, 8, 255);
 467         }
 468         put_bits(&s->pb, 2, s->intra_dc_precision);
 469
 470         av_assert0(s->picture_structure == PICT_FRAME);
 471         put_bits(&s->pb, 2, s->picture_structure);
 472         if (s->progressive_sequence)
 473             put_bits(&s->pb, 1, 0);             /* no repeat */
 474         else
 475             put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
 476         /* XXX: optimize the generation of this flag with entropy measures */
 477         s->frame_pred_frame_dct = s->progressive_sequence;
 478
 479         put_bits(&s->pb, 1, s->frame_pred_frame_dct);
 480         put_bits(&s->pb, 1, s->concealment_motion_vectors);
 481         put_bits(&s->pb, 1, s->q_scale_type);
 482         put_bits(&s->pb, 1, s->intra_vlc_format);
 483         put_bits(&s->pb, 1, s->alternate_scan);
 484         put_bits(&s->pb, 1, s->repeat_first_field);
 485         s->progressive_frame = s->progressive_sequence;
 486         /* chroma_420_type */
 487         put_bits(&s->pb, 1, s->chroma_format ==
 488                             CHROMA_420 ? s->progressive_frame : 0);
 489         put_bits(&s->pb, 1, s->progressive_frame);
 490         put_bits(&s->pb, 1, 0);                 /* composite_display_flag */
 491     }
 492     if (s->scan_offset) {
 493         int i;
 494
 495         put_header(s, USER_START_CODE);
 496         for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
 497             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
 498     }
 499     side_data = av_frame_get_side_data(s->current_picture_ptr->f,
 500                                        AV_FRAME_DATA_STEREO3D);
 501     if (side_data) {
 502         AVStereo3D *stereo = (AVStereo3D *)side_data->data;
 503         uint8_t fpa_type;
 504
 505         switch (stereo->type) {
 506         case AV_STEREO3D_SIDEBYSIDE:
 507             fpa_type = 0x03;
 508             break;
 509         case AV_STEREO3D_TOPBOTTOM:
 510             fpa_type = 0x04;
 511             break;
 512         case AV_STEREO3D_2D:
 513             fpa_type = 0x08;
 514             break;
 515         case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
 516             fpa_type = 0x23;
 517             break;
 518         default:
 519             fpa_type = 0;
 520             break;
 521         }
 522
 523         if (fpa_type != 0) {
 524             put_header(s, USER_START_CODE);
 525             put_bits(&s->pb, 8, 'J');   // S3D_video_format_signaling_identifier
 526             put_bits(&s->pb, 8, 'P');
 527             put_bits(&s->pb, 8, '3');
 528             put_bits(&s->pb, 8, 'D');
 529             put_bits(&s->pb, 8, 0x03);  // S3D_video_format_length
 530
 531             put_bits(&s->pb, 1, 1);     // reserved_bit
 532             put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
 533             put_bits(&s->pb, 8, 0x04);  // reserved_data[0]
 534             put_bits(&s->pb, 8, 0xFF);  // reserved_data[1]
 535         }
 536     }
 537
 538     s->mb_y = 0;
 539     ff_mpeg1_encode_slice_header(s);
 540 }
 541
 542 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
 543                                 int has_mv, int field_motion)
 544 {
 545     put_bits(&s->pb, n, bits);
 546     if (!s->frame_pred_frame_dct) {
 547         if (has_mv)
 548             /* motion_type: frame/field */
 549             put_bits(&s->pb, 2, 2 - field_motion);
 550         put_bits(&s->pb, 1, s->interlaced_dct);
 551     }
 552 }
 553
 554 // RAL: Parameter added: f_or_b_code
 555 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
 556 {
 557     if (val == 0) {
 558         /* zero vector */
 559         put_bits(&s->pb,
 560                  ff_mpeg12_mbMotionVectorTable[0][1],
 561                  ff_mpeg12_mbMotionVectorTable[0][0]);
 562     } else {
 563         int code, sign, bits;
 564         int bit_size = f_or_b_code - 1;
 565         int range    = 1 << bit_size;
 566         /* modulo encoding */
 567         val = sign_extend(val, 5 + bit_size);
 568
 569         if (val >= 0) {
 570             val--;
 571             code = (val >> bit_size) + 1;
 572             bits = val & (range - 1);
 573             sign = 0;
 574         } else {
 575             val = -val;
 576             val--;
 577             code = (val >> bit_size) + 1;
 578             bits = val & (range - 1);
 579             sign = 1;
 580         }
 581
 582         av_assert2(code > 0 && code <= 16);
 583
 584         put_bits(&s->pb,
 585                  ff_mpeg12_mbMotionVectorTable[code][1],
 586                  ff_mpeg12_mbMotionVectorTable[code][0]);
 587
 588         put_bits(&s->pb, 1, sign);
 589         if (bit_size > 0)
 590             put_bits(&s->pb, bit_size, bits);
 591     }
 592 }
 593
 594 static inline void encode_dc(MpegEncContext *s, int diff, int component)
 595 {
 596     unsigned int diff_u = diff + 255;
 597     if (diff_u >= 511) {
 598         int index;
 599
 600         if (diff < 0) {
 601             index = av_log2_16bit(-2 * diff);
 602             diff--;
 603         } else {
 604             index = av_log2_16bit(2 * diff);
 605         }
 606         if (component == 0)
 607             put_bits(&s->pb,
 608                      ff_mpeg12_vlc_dc_lum_bits[index] + index,
 609                      (ff_mpeg12_vlc_dc_lum_code[index] << index) +
 610                      av_mod_uintp2(diff, index));
 611         else
 612             put_bits(&s->pb,
 613                      ff_mpeg12_vlc_dc_chroma_bits[index] + index,
 614                      (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
 615                      av_mod_uintp2(diff, index));
 616     } else {
 617         if (component == 0)
 618             put_bits(&s->pb,
 619                      mpeg1_lum_dc_uni[diff + 255] & 0xFF,
 620                      mpeg1_lum_dc_uni[diff + 255] >> 8);
 621         else
 622             put_bits(&s->pb,
 623                      mpeg1_chr_dc_uni[diff + 255] & 0xFF,
 624                      mpeg1_chr_dc_uni[diff + 255] >> 8);
 625     }
 626 }
 627
 628 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
 629 {
 630     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
 631     int code, component;
 632     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
 633
 634     last_index = s->block_last_index[n];
 635
 636     /* DC coef */
 637     if (s->mb_intra) {
 638         component = (n <= 3 ? 0 : (n & 1) + 1);
 639         dc        = block[0];                   /* overflow is impossible */
 640         diff      = dc - s->last_dc[component];
 641         encode_dc(s, diff, component);
 642         s->last_dc[component] = dc;
 643         i = 1;
 644         if (s->intra_vlc_format)
 645             table_vlc = ff_rl_mpeg2.table_vlc;
 646     } else {
 647         /* encode the first coefficient: needs to be done here because
 648          * it is handled slightly differently */
 649         level = block[0];
 650         if (abs(level) == 1) {
 651             code = ((uint32_t)level >> 31);     /* the sign bit */
 652             put_bits(&s->pb, 2, code | 0x02);
 653             i = 1;
 654         } else {
 655             i             = 0;
 656             last_non_zero = -1;
 657             goto next_coef;
 658         }
 659     }
 660
 661     /* now quantify & encode AC coefs */
 662     last_non_zero = i - 1;
 663
 664     for (; i <= last_index; i++) {
 665         j     = s->intra_scantable.permutated[i];
 666         level = block[j];
 667
 668 next_coef:
 669         /* encode using VLC */
 670         if (level != 0) {
 671             run = i - last_non_zero - 1;
 672
 673             alevel = level;
 674             MASK_ABS(sign, alevel);
 675             sign &= 1;
 676
 677             if (alevel <= mpeg1_max_level[0][run]) {
 678                 code = mpeg1_index_run[0][run] + alevel - 1;
 679                 /* store the VLC & sign at once */
 680                 put_bits(&s->pb, table_vlc[code][1] + 1,
 681                          (table_vlc[code][0] << 1) + sign);
 682             } else {
 683                 /* escape seems to be pretty rare <5% so I do not optimize it */
 684                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
 685                 /* escape: only clip in this case */
 686                 put_bits(&s->pb, 6, run);
 687                 if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
 688                     if (alevel < 128) {
 689                         put_sbits(&s->pb, 8, level);
 690                     } else {
 691                         if (level < 0)
 692                             put_bits(&s->pb, 16, 0x8001 + level + 255);
 693                         else
 694                             put_sbits(&s->pb, 16, level);
 695                     }
 696                 } else {
 697                     put_sbits(&s->pb, 12, level);
 698                 }
 699             }
 700             last_non_zero = i;
 701         }
 702     }
 703     /* end of block */
 704     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
 705 }
 706
 707 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
 708                                                       int16_t block[8][64],
 709                                                       int motion_x, int motion_y,
 710                                                       int mb_block_count)
 711 {
 712     int i, cbp;
 713     const int mb_x     = s->mb_x;
 714     const int mb_y     = s->mb_y;
 715     const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
 716
 717     /* compute cbp */
 718     cbp = 0;
 719     for (i = 0; i < mb_block_count; i++)
 720         if (s->block_last_index[i] >= 0)
 721             cbp |= 1 << (mb_block_count - 1 - i);
 722
 723     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
 724         (mb_x != s->mb_width - 1 ||
 725          (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
 726         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
 727          (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
 728           (((s->mv_dir & MV_DIR_FORWARD)
 729             ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
 730                (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
 731            ((s->mv_dir & MV_DIR_BACKWARD)
 732             ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
 733                (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
 734         s->mb_skip_run++;
 735         s->qscale -= s->dquant;
 736         s->skip_count++;
 737         s->misc_bits++;
 738         s->last_bits++;
 739         if (s->pict_type == AV_PICTURE_TYPE_P) {
 740             s->last_mv[0][0][0] =
 741             s->last_mv[0][0][1] =
 742             s->last_mv[0][1][0] =
 743             s->last_mv[0][1][1] = 0;
 744         }
 745     } else {
 746         if (first_mb) {
 747             av_assert0(s->mb_skip_run == 0);
 748             encode_mb_skip_run(s, s->mb_x);
 749         } else {
 750             encode_mb_skip_run(s, s->mb_skip_run);
 751         }
 752
 753         if (s->pict_type == AV_PICTURE_TYPE_I) {
 754             if (s->dquant && cbp) {
 755                 /* macroblock_type: macroblock_quant = 1 */
 756                 put_mb_modes(s, 2, 1, 0, 0);
 757                 put_qscale(s);
 758             } else {
 759                 /* macroblock_type: macroblock_quant = 0 */
 760                 put_mb_modes(s, 1, 1, 0, 0);
 761                 s->qscale -= s->dquant;
 762             }
 763             s->misc_bits += get_bits_diff(s);
 764             s->i_count++;
 765         } else if (s->mb_intra) {
 766             if (s->dquant && cbp) {
 767                 put_mb_modes(s, 6, 0x01, 0, 0);
 768                 put_qscale(s);
 769             } else {
 770                 put_mb_modes(s, 5, 0x03, 0, 0);
 771                 s->qscale -= s->dquant;
 772             }
 773             s->misc_bits += get_bits_diff(s);
 774             s->i_count++;
 775             memset(s->last_mv, 0, sizeof(s->last_mv));
 776         } else if (s->pict_type == AV_PICTURE_TYPE_P) {
 777             if (s->mv_type == MV_TYPE_16X16) {
 778                 if (cbp != 0) {
 779                     if ((motion_x | motion_y) == 0) {
 780                         if (s->dquant) {
 781                             /* macroblock_pattern & quant */
 782                             put_mb_modes(s, 5, 1, 0, 0);
 783                             put_qscale(s);
 784                         } else {
 785                             /* macroblock_pattern only */
 786                             put_mb_modes(s, 2, 1, 0, 0);
 787                         }
 788                         s->misc_bits += get_bits_diff(s);
 789                     } else {
 790                         if (s->dquant) {
 791                             put_mb_modes(s, 5, 2, 1, 0);    /* motion + cbp */
 792                             put_qscale(s);
 793                         } else {
 794                             put_mb_modes(s, 1, 1, 1, 0);    /* motion + cbp */
 795                         }
 796                         s->misc_bits += get_bits_diff(s);
 797                         // RAL: f_code parameter added
 798                         mpeg1_encode_motion(s,
 799                                             motion_x - s->last_mv[0][0][0],
 800                                             s->f_code);
 801                         // RAL: f_code parameter added
 802                         mpeg1_encode_motion(s,
 803                                             motion_y - s->last_mv[0][0][1],
 804                                             s->f_code);
 805                         s->mv_bits += get_bits_diff(s);
 806                     }
 807                 } else {
 808                     put_bits(&s->pb, 3, 1);         /* motion only */
 809                     if (!s->frame_pred_frame_dct)
 810                         put_bits(&s->pb, 2, 2);     /* motion_type: frame */
 811                     s->misc_bits += get_bits_diff(s);
 812                     // RAL: f_code parameter added
 813                     mpeg1_encode_motion(s,
 814                                         motion_x - s->last_mv[0][0][0],
 815                                         s->f_code);
 816                     // RAL: f_code parameter added
 817                     mpeg1_encode_motion(s,
 818                                         motion_y - s->last_mv[0][0][1],
 819                                         s->f_code);
 820                     s->qscale  -= s->dquant;
 821                     s->mv_bits += get_bits_diff(s);
 822                 }
 823                 s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
 824                 s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
 825             } else {
 826                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
 827
 828                 if (cbp) {
 829                     if (s->dquant) {
 830                         put_mb_modes(s, 5, 2, 1, 1);    /* motion + cbp */
 831                         put_qscale(s);
 832                     } else {
 833                         put_mb_modes(s, 1, 1, 1, 1);    /* motion + cbp */
 834                     }
 835                 } else {
 836                     put_bits(&s->pb, 3, 1);             /* motion only */
 837                     put_bits(&s->pb, 2, 1);             /* motion_type: field */
 838                     s->qscale -= s->dquant;
 839                 }
 840                 s->misc_bits += get_bits_diff(s);
 841                 for (i = 0; i < 2; i++) {
 842                     put_bits(&s->pb, 1, s->field_select[0][i]);
 843                     mpeg1_encode_motion(s,
 844                                         s->mv[0][i][0] - s->last_mv[0][i][0],
 845                                         s->f_code);
 846                     mpeg1_encode_motion(s,
 847                                         s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 848                                         s->f_code);
 849                     s->last_mv[0][i][0] = s->mv[0][i][0];
 850                     s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
 851                 }
 852                 s->mv_bits += get_bits_diff(s);
 853             }
 854             if (cbp) {
 855                 if (s->chroma_y_shift) {
 856                     put_bits(&s->pb,
 857                              ff_mpeg12_mbPatTable[cbp][1],
 858                              ff_mpeg12_mbPatTable[cbp][0]);
 859                 } else {
 860                     put_bits(&s->pb,
 861                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 862                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 863                     put_sbits(&s->pb, 2, cbp);
 864                 }
 865             }
 866             s->f_count++;
 867         } else {
 868             if (s->mv_type == MV_TYPE_16X16) {
 869                 if (cbp) {                      // With coded bloc pattern
 870                     if (s->dquant) {
 871                         if (s->mv_dir == MV_DIR_FORWARD)
 872                             put_mb_modes(s, 6, 3, 1, 0);
 873                         else
 874                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
 875                         put_qscale(s);
 876                     } else {
 877                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
 878                     }
 879                 } else {                        // No coded bloc pattern
 880                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 881                     if (!s->frame_pred_frame_dct)
 882                         put_bits(&s->pb, 2, 2); /* motion_type: frame */
 883                     s->qscale -= s->dquant;
 884                 }
 885                 s->misc_bits += get_bits_diff(s);
 886                 if (s->mv_dir & MV_DIR_FORWARD) {
 887                     mpeg1_encode_motion(s,
 888                                         s->mv[0][0][0] - s->last_mv[0][0][0],
 889                                         s->f_code);
 890                     mpeg1_encode_motion(s,
 891                                         s->mv[0][0][1] - s->last_mv[0][0][1],
 892                                         s->f_code);
 893                     s->last_mv[0][0][0] =
 894                     s->last_mv[0][1][0] = s->mv[0][0][0];
 895                     s->last_mv[0][0][1] =
 896                     s->last_mv[0][1][1] = s->mv[0][0][1];
 897                     s->f_count++;
 898                 }
 899                 if (s->mv_dir & MV_DIR_BACKWARD) {
 900                     mpeg1_encode_motion(s,
 901                                         s->mv[1][0][0] - s->last_mv[1][0][0],
 902                                         s->b_code);
 903                     mpeg1_encode_motion(s,
 904                                         s->mv[1][0][1] - s->last_mv[1][0][1],
 905                                         s->b_code);
 906                     s->last_mv[1][0][0] =
 907                     s->last_mv[1][1][0] = s->mv[1][0][0];
 908                     s->last_mv[1][0][1] =
 909                     s->last_mv[1][1][1] = s->mv[1][0][1];
 910                     s->b_count++;
 911                 }
 912             } else {
 913                 av_assert2(s->mv_type == MV_TYPE_FIELD);
 914                 av_assert2(!s->frame_pred_frame_dct);
 915                 if (cbp) {                      // With coded bloc pattern
 916                     if (s->dquant) {
 917                         if (s->mv_dir == MV_DIR_FORWARD)
 918                             put_mb_modes(s, 6, 3, 1, 1);
 919                         else
 920                             put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
 921                         put_qscale(s);
 922                     } else {
 923                         put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
 924                     }
 925                 } else {                        // No coded bloc pattern
 926                     put_bits(&s->pb, 5 - s->mv_dir, 2);
 927                     put_bits(&s->pb, 2, 1);     /* motion_type: field */
 928                     s->qscale -= s->dquant;
 929                 }
 930                 s->misc_bits += get_bits_diff(s);
 931                 if (s->mv_dir & MV_DIR_FORWARD) {
 932                     for (i = 0; i < 2; i++) {
 933                         put_bits(&s->pb, 1, s->field_select[0][i]);
 934                         mpeg1_encode_motion(s,
 935                                             s->mv[0][i][0] - s->last_mv[0][i][0],
 936                                             s->f_code);
 937                         mpeg1_encode_motion(s,
 938                                             s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
 939                                             s->f_code);
 940                         s->last_mv[0][i][0] = s->mv[0][i][0];
 941                         s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
 942                     }
 943                     s->f_count++;
 944                 }
 945                 if (s->mv_dir & MV_DIR_BACKWARD) {
 946                     for (i = 0; i < 2; i++) {
 947                         put_bits(&s->pb, 1, s->field_select[1][i]);
 948                         mpeg1_encode_motion(s,
 949                                             s->mv[1][i][0] - s->last_mv[1][i][0],
 950                                             s->b_code);
 951                         mpeg1_encode_motion(s,
 952                                             s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
 953                                             s->b_code);
 954                         s->last_mv[1][i][0] = s->mv[1][i][0];
 955                         s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
 956                     }
 957                     s->b_count++;
 958                 }
 959             }
 960             s->mv_bits += get_bits_diff(s);
 961             if (cbp) {
 962                 if (s->chroma_y_shift) {
 963                     put_bits(&s->pb,
 964                              ff_mpeg12_mbPatTable[cbp][1],
 965                              ff_mpeg12_mbPatTable[cbp][0]);
 966                 } else {
 967                     put_bits(&s->pb,
 968                              ff_mpeg12_mbPatTable[cbp >> 2][1],
 969                              ff_mpeg12_mbPatTable[cbp >> 2][0]);
 970                     put_sbits(&s->pb, 2, cbp);
 971                 }
 972             }
 973         }
 974         for (i = 0; i < mb_block_count; i++)
 975             if (cbp & (1 << (mb_block_count - 1 - i)))
 976                 mpeg1_encode_block(s, block[i], i);
 977         s->mb_skip_run = 0;
 978         if (s->mb_intra)
 979             s->i_tex_bits += get_bits_diff(s);
 980         else
 981             s->p_tex_bits += get_bits_diff(s);
 982     }
 983 }
 984
 985 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
 986                         int motion_x, int motion_y)
 987 {
 988     if (s->chroma_format == CHROMA_420)
 989         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
 990     else
 991         mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
 992 }
 993
 994 av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
 995 {
 996     static int done = 0;
 997
 998     ff_mpeg12_common_init(s);
 999
1000     if (!done) {
1001         int f_code;
1002         int mv;
1003         int i;
1004
1005         done = 1;
1006         ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
1007         ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
1008
1009         for (i = 0; i < 64; i++) {
1010             mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1011             mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1012         }
1013
1014         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
1015         if (s->intra_vlc_format)
1016             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
1017
1018         /* build unified dc encoding tables */
1019         for (i = -255; i < 256; i++) {
1020             int adiff, index;
1021             int bits, code;
1022             int diff = i;
1023
1024             adiff = FFABS(diff);
1025             if (diff < 0)
1026                 diff--;
1027             index = av_log2(2 * adiff);
1028
1029             bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
1030             code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1031                     av_mod_uintp2(diff, index);
1032             mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1033
1034             bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
1035             code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
1036                     av_mod_uintp2(diff, index);
1037             mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1038         }
1039
1040         for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1041             for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1042                 int len;
1043
1044                 if (mv == 0) {
1045                     len = ff_mpeg12_mbMotionVectorTable[0][1];
1046                 } else {
1047                     int val, bit_size, code;
1048
1049                     bit_size = f_code - 1;
1050
1051                     val = mv;
1052                     if (val < 0)
1053                         val = -val;
1054                     val--;
1055                     code = (val >> bit_size) + 1;
1056                     if (code < 17)
1057                         len = ff_mpeg12_mbMotionVectorTable[code][1] +
1058                               1 + bit_size;
1059                     else
1060                         len = ff_mpeg12_mbMotionVectorTable[16][1] +
1061                               2 + bit_size;
1062                 }
1063
1064                 mv_penalty[f_code][mv + MAX_DMV] = len;
1065             }
1066
1067
1068         for (f_code = MAX_FCODE; f_code > 0; f_code--)
1069             for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1070                 fcode_tab[mv + MAX_MV] = f_code;
1071     }
1072     s->me.mv_penalty = mv_penalty;
1073     s->fcode_tab     = fcode_tab;
1074     if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1075         s->min_qcoeff = -255;
1076         s->max_qcoeff = 255;
1077     } else {
1078         s->min_qcoeff = -2047;
1079         s->max_qcoeff = 2047;
1080     }
1081     if (s->intra_vlc_format) {
1082         s->intra_ac_vlc_length      =
1083         s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1084     } else {
1085         s->intra_ac_vlc_length      =
1086         s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1087     }
1088     s->inter_ac_vlc_length      =
1089     s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1090 }
1091
1092 #define OFFSET(x) offsetof(MpegEncContext, x)
1093 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1094 #define COMMON_OPTS                                                           \
1095     { "gop_timecode",        "MPEG GOP Timecode in hh:mm:ss[:;.]ff format",   \
1096       OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1097     { "intra_vlc",           "Use MPEG-2 intra VLC table.",                   \
1098       OFFSET(intra_vlc_format),    AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1099     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
1100       OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1101     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
1102       OFFSET(scan_offset),         AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1103
1104 static const AVOption mpeg1_options[] = {
1105     COMMON_OPTS
1106     FF_MPV_COMMON_OPTS
1107     { NULL },
1108 };
1109
1110 static const AVOption mpeg2_options[] = {
1111     COMMON_OPTS
1112     { "non_linear_quant", "Use nonlinear quantizer.",    OFFSET(q_scale_type),   AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1113     { "alternate_scan",   "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1114     { "seq_disp_ext",     "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1115     {     "auto",   NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = -1},  0, 0, VE, "seq_disp_ext" },
1116     {     "never",  NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = 0 },  0, 0, VE, "seq_disp_ext" },
1117     {     "always", NULL, 0, AV_OPT_TYPE_CONST,  {.i64 = 1 },  0, 0, VE, "seq_disp_ext" },
1118     FF_MPV_COMMON_OPTS
1119     { NULL },
1120 };
1121
1122 #define mpeg12_class(x)                                 \
1123 static const AVClass mpeg ## x ## _class = {            \
1124     .class_name = "mpeg" # x "video encoder",           \
1125     .item_name  = av_default_item_name,                 \
1126     .option     = mpeg ## x ## _options,                \
1127     .version    = LIBAVUTIL_VERSION_INT,                \
1128 };
1129
1130 mpeg12_class(1)
1131 mpeg12_class(2)
1132
1133 AVCodec ff_mpeg1video_encoder = {
1134     .name                 = "mpeg1video",
1135     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1136     .type                 = AVMEDIA_TYPE_VIDEO,
1137     .id                   = AV_CODEC_ID_MPEG1VIDEO,
1138     .priv_data_size       = sizeof(MpegEncContext),
1139     .init                 = encode_init,
1140     .encode2              = ff_mpv_encode_picture,
1141     .close                = ff_mpv_encode_end,
1142     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1143     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1144                                                            AV_PIX_FMT_NONE },
1145     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1146     .priv_class           = &mpeg1_class,
1147 };
1148
1149 AVCodec ff_mpeg2video_encoder = {
1150     .name                 = "mpeg2video",
1151     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1152     .type                 = AVMEDIA_TYPE_VIDEO,
1153     .id                   = AV_CODEC_ID_MPEG2VIDEO,
1154     .priv_data_size       = sizeof(MpegEncContext),
1155     .init                 = encode_init,
1156     .encode2              = ff_mpv_encode_picture,
1157     .close                = ff_mpv_encode_end,
1158     .supported_framerates = ff_mpeg2_frame_rate_tab,
1159     .pix_fmts             = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1160                                                            AV_PIX_FMT_YUV422P,
1161                                                            AV_PIX_FMT_NONE },
1162     .capabilities         = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
1163     .priv_class           = &mpeg2_class,
1164 };