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FFmpeg/libavcodec/mpeg12enc.c

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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 "avcodec.h"

  29. #include "dsputil.h"

  30. #include "mathops.h"

  31. #include "mpegvideo.h"

  32. 

  33. #include "mpeg12.h"

  34. #include "mpeg12data.h"

  35. #include "bytestream.h"

  36. #include "libavutil/log.h"

  37. #include "libavutil/opt.h"

  38. #include "libavutil/avassert.h"

  39. #include "libavutil/timecode.h"

  40. 

  41. static const uint8_t inv_non_linear_qscale[13] = {

  42.     0, 2, 4, 6, 8,

  43.     9,10,11,12,13,14,15,16,

  44. };

  45. 

  46. static const uint8_t svcd_scan_offset_placeholder[14] = {

  47.     0x10, 0x0E,

  48.     0x00, 0x80, 0x81,

  49.     0x00, 0x80, 0x81,

  50.     0xff, 0xff, 0xff,

  51.     0xff, 0xff, 0xff,

  52. };

  53. 

  54. static void mpeg1_encode_block(MpegEncContext *s,

  55.                          DCTELEM *block,

  56.                          int component);

  57. static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code);    // RAL: f_code parameter added

  58. 

  59. static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];

  60. static uint8_t fcode_tab[MAX_MV*2+1];

  61. 

  62. static uint8_t  uni_mpeg1_ac_vlc_len [64*64*2];

  63. static uint8_t  uni_mpeg2_ac_vlc_len [64*64*2];

  64. 

  65. /* simple include everything table for dc, first byte is bits number next 3 are code*/

  66. static uint32_t mpeg1_lum_dc_uni[512];

  67. static uint32_t mpeg1_chr_dc_uni[512];

  68. 

  69. static uint8_t mpeg1_index_run[2][64];

  70. static int8_t mpeg1_max_level[2][64];

  71. 

  72. static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){

  73.     int i;

  74. 

  75.     for(i=0; i<128; i++){

  76.         int level= i-64;

  77.         int run;

  78.         if (!level)

  79.             continue;

  80.         for(run=0; run<64; run++){

  81.             int len, code;

  82. 

  83.             int alevel= FFABS(level);

  84. 

  85.             if (alevel > rl->max_level[0][run])

  86.                 code= 111; /*rl->n*/

  87.             else

  88.                 code= rl->index_run[0][run] + alevel - 1;

  89. 

  90.             if (code < 111 /* rl->n */) {

  91.                 /* length of vlc and sign */

  92.                 len=   rl->table_vlc[code][1]+1;

  93.             } else {

  94.                 len=  rl->table_vlc[111/*rl->n*/][1]+6;

  95. 

  96.                 if (alevel < 128) {

  97.                     len += 8;

  98.                 } else {

  99.                     len += 16;

  100.                 }

  101.             }

  102. 

  103.             uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;

  104.         }

  105.     }

  106. }

  107. 

  108. 

  109. static int find_frame_rate_index(MpegEncContext *s){

  110.     int i;

  111.     AVRational bestq= (AVRational){0, 0};

  112.     AVRational ext;

  113.     AVRational target = av_inv_q(s->avctx->time_base);

  114. 

  115.     for(i=1;i<14;i++) {

  116.         if(s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && i>=9) break;

  117. 

  118.         for (ext.num=1; ext.num <= 4; ext.num++) {

  119.             for (ext.den=1; ext.den <= 32; ext.den++) {

  120.                 AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);

  121. 

  122.                 if(s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))

  123.                     continue;

  124.                 if(av_gcd(ext.den, ext.num) != 1)

  125.                     continue;

  126. 

  127.                 if(    bestq.num==0

  128.                     || av_nearer_q(target, bestq, q) < 0

  129.                     || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0){

  130.                     bestq = q;

  131.                     s->frame_rate_index= i;

  132.                     s->mpeg2_frame_rate_ext.num = ext.num;

  133.                     s->mpeg2_frame_rate_ext.den = ext.den;

  134.                 }

  135.             }

  136.         }

  137.     }

  138.     if(av_cmp_q(target, bestq))

  139.         return -1;

  140.     else

  141.         return 0;

  142. }

  143. 

  144. static av_cold int encode_init(AVCodecContext *avctx)

  145. {

  146.     MpegEncContext *s = avctx->priv_data;

  147. 

  148.     if(ff_MPV_encode_init(avctx) < 0)

  149.         return -1;

  150. 

  151.     if(find_frame_rate_index(s) < 0){

  152.         if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){

  153.             av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);

  154.             return -1;

  155.         }else{

  156.             av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num);

  157.         }

  158.     }

  159. 

  160.     if(avctx->profile == FF_PROFILE_UNKNOWN){

  161.         if(avctx->level != FF_LEVEL_UNKNOWN){

  162.             av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");

  163.             return -1;

  164.         }

  165.         avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */

  166.     }

  167. 

  168.     if(avctx->level == FF_LEVEL_UNKNOWN){

  169.         if(avctx->profile == 0){ /* 4:2:2 */

  170.             if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */

  171.             else                                            avctx->level = 2; /* High */

  172.         }else{

  173.             if(avctx->profile != 1 && s->chroma_format != CHROMA_420){

  174.                 av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");

  175.                 return -1;

  176.             }

  177.             if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */

  178.             else if(avctx->width <= 1440)                   avctx->level = 6; /* High 1440 */

  179.             else                                            avctx->level = 4; /* High */

  180.         }

  181.     }

  182. 

  183.     s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);

  184.     if (s->drop_frame_timecode)

  185.         s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;

  186.     if (s->drop_frame_timecode && s->frame_rate_index != 4) {

  187.         av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");

  188.         return -1;

  189.     }

  190. 

  191.     if (s->tc_opt_str) {

  192.         AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];

  193.         int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);

  194.         if (ret < 0)

  195.             return ret;

  196.         s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);

  197.         s->avctx->timecode_frame_start = s->tc.start;

  198.     } else {

  199.         s->avctx->timecode_frame_start = 0; // default is -1

  200.     }

  201.     return 0;

  202. }

  203. 

  204. static void put_header(MpegEncContext *s, int header)

  205. {

  206.     avpriv_align_put_bits(&s->pb);

  207.     put_bits(&s->pb, 16, header>>16);

  208.     put_sbits(&s->pb, 16, header);

  209. }

  210. 

  211. /* put sequence header if needed */

  212. static void mpeg1_encode_sequence_header(MpegEncContext *s)

  213. {

  214.         unsigned int vbv_buffer_size;

  215.         unsigned int fps, v;

  216.         int i;

  217.         uint64_t time_code;

  218.         float best_aspect_error= 1E10;

  219.         float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);

  220.         int constraint_parameter_flag;

  221. 

  222.         if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)

  223. 

  224.         if (s->current_picture.f.key_frame) {

  225.             AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];

  226. 

  227.             /* mpeg1 header repeated every gop */

  228.             put_header(s, SEQ_START_CODE);

  229. 

  230.             put_sbits(&s->pb, 12, s->width );

  231.             put_sbits(&s->pb, 12, s->height);

  232. 

  233.             for(i=1; i<15; i++){

  234.                 float error= aspect_ratio;

  235.                 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <=1)

  236.                     error-= 1.0/ff_mpeg1_aspect[i];

  237.                 else

  238.                     error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width;

  239. 

  240.                 error= FFABS(error);

  241. 

  242.                 if(error < best_aspect_error){

  243.                     best_aspect_error= error;

  244.                     s->aspect_ratio_info= i;

  245.                 }

  246.             }

  247. 

  248.             put_bits(&s->pb, 4, s->aspect_ratio_info);

  249.             put_bits(&s->pb, 4, s->frame_rate_index);

  250. 

  251.             if(s->avctx->rc_max_rate){

  252.                 v = (s->avctx->rc_max_rate + 399) / 400;

  253.                 if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)

  254.                     v = 0x3ffff;

  255.             }else{

  256.                 v= 0x3FFFF;

  257.             }

  258. 

  259.             if(s->avctx->rc_buffer_size)

  260.                 vbv_buffer_size = s->avctx->rc_buffer_size;

  261.             else

  262.                 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */

  263.                 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;

  264.             vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;

  265. 

  266.             put_sbits(&s->pb, 18, v);

  267.             put_bits(&s->pb, 1, 1); /* marker */

  268.             put_sbits(&s->pb, 10, vbv_buffer_size);

  269. 

  270.             constraint_parameter_flag=

  271.                 s->width <= 768 && s->height <= 576 &&

  272.                 s->mb_width * s->mb_height <= 396 &&

  273.                 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&

  274.                 framerate.num <= framerate.den*30 &&

  275.                 s->avctx->me_range && s->avctx->me_range < 128 &&

  276.                 vbv_buffer_size <= 20 &&

  277.                 v <= 1856000/400 &&

  278.                 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;

  279. 

  280.             put_bits(&s->pb, 1, constraint_parameter_flag);

  281. 

  282.             ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);

  283.             ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);

  284. 

  285.             if(s->codec_id == AV_CODEC_ID_MPEG2VIDEO){

  286.                 put_header(s, EXT_START_CODE);

  287.                 put_bits(&s->pb, 4, 1); //seq ext

  288. 

  289.                 put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */

  290. 

  291.                 put_bits(&s->pb, 3, s->avctx->profile); //profile

  292.                 put_bits(&s->pb, 4, s->avctx->level); //level

  293. 

  294.                 put_bits(&s->pb, 1, s->progressive_sequence);

  295.                 put_bits(&s->pb, 2, s->chroma_format);

  296.                 put_bits(&s->pb, 2, s->width >>12);

  297.                 put_bits(&s->pb, 2, s->height>>12);

  298.                 put_bits(&s->pb, 12, v>>18); //bitrate ext

  299.                 put_bits(&s->pb, 1, 1); //marker

  300.                 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext

  301.                 put_bits(&s->pb, 1, s->low_delay);

  302.                 put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n

  303.                 put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d

  304.             }

  305. 

  306.             put_header(s, GOP_START_CODE);

  307.             put_bits(&s->pb, 1, s->drop_frame_timecode); /* drop frame flag */

  308.             /* time code : we must convert from the real frame rate to a

  309.                fake mpeg frame rate in case of low frame rate */

  310.             fps = (framerate.num + framerate.den/2)/ framerate.den;

  311.             time_code = s->current_picture_ptr->f.coded_picture_number + s->avctx->timecode_frame_start;

  312. 

  313.             s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;

  314.             av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));

  315.             if (s->drop_frame_timecode)

  316.                 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);

  317.             put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));

  318.             put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));

  319.             put_bits(&s->pb, 1, 1);

  320.             put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));

  321.             put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));

  322.             put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));

  323.             put_bits(&s->pb, 1, 0); /* broken link */

  324.         }

  325. }

  326. 

  327. static inline void encode_mb_skip_run(MpegEncContext *s, int run){

  328.     while (run >= 33) {

  329.         put_bits(&s->pb, 11, 0x008);

  330.         run -= 33;

  331.     }

  332.     put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],

  333.              ff_mpeg12_mbAddrIncrTable[run][0]);

  334. }

  335. 

  336. static av_always_inline void put_qscale(MpegEncContext *s)

  337. {

  338.     if(s->q_scale_type){

  339.         av_assert2(s->qscale>=1 && s->qscale <=12);

  340.         put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);

  341.     }else{

  342.         put_bits(&s->pb, 5, s->qscale);

  343.     }

  344. }

  345. 

  346. void ff_mpeg1_encode_slice_header(MpegEncContext *s){

  347.     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {

  348.         put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));

  349.         put_bits(&s->pb, 3, s->mb_y >> 7);  /* slice_vertical_position_extension */

  350.     } else {

  351.         put_header(s, SLICE_MIN_START_CODE + s->mb_y);

  352.     }

  353.     put_qscale(s);

  354.     put_bits(&s->pb, 1, 0); /* slice extra information */

  355. }

  356. 

  357. void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)

  358. {

  359.     mpeg1_encode_sequence_header(s);

  360. 

  361.     /* mpeg1 picture header */

  362.     put_header(s, PICTURE_START_CODE);

  363.     /* temporal reference */

  364. 

  365.     // RAL: s->picture_number instead of s->fake_picture_number

  366.     put_bits(&s->pb, 10, (s->picture_number -

  367.                           s->gop_picture_number) & 0x3ff);

  368.     put_bits(&s->pb, 3, s->pict_type);

  369. 

  370.     s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;

  371.     put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */

  372. 

  373.     // RAL: Forward f_code also needed for B frames

  374.     if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {

  375.         put_bits(&s->pb, 1, 0); /* half pel coordinates */

  376.         if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO)

  377.             put_bits(&s->pb, 3, s->f_code); /* forward_f_code */

  378.         else

  379.             put_bits(&s->pb, 3, 7); /* forward_f_code */

  380.     }

  381. 

  382.     // RAL: Backward f_code necessary for B frames

  383.     if (s->pict_type == AV_PICTURE_TYPE_B) {

  384.         put_bits(&s->pb, 1, 0); /* half pel coordinates */

  385.         if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO)

  386.             put_bits(&s->pb, 3, s->b_code); /* backward_f_code */

  387.         else

  388.             put_bits(&s->pb, 3, 7); /* backward_f_code */

  389.     }

  390. 

  391.     put_bits(&s->pb, 1, 0); /* extra bit picture */

  392. 

  393.     s->frame_pred_frame_dct = 1;

  394.     if(s->codec_id == AV_CODEC_ID_MPEG2VIDEO){

  395.         put_header(s, EXT_START_CODE);

  396.         put_bits(&s->pb, 4, 8); //pic ext

  397.         if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {

  398.             put_bits(&s->pb, 4, s->f_code);

  399.             put_bits(&s->pb, 4, s->f_code);

  400.         }else{

  401.             put_bits(&s->pb, 8, 255);

  402.         }

  403.         if (s->pict_type == AV_PICTURE_TYPE_B) {

  404.             put_bits(&s->pb, 4, s->b_code);

  405.             put_bits(&s->pb, 4, s->b_code);

  406.         }else{

  407.             put_bits(&s->pb, 8, 255);

  408.         }

  409.         put_bits(&s->pb, 2, s->intra_dc_precision);

  410. 

  411.         av_assert0(s->picture_structure == PICT_FRAME);

  412.         put_bits(&s->pb, 2, s->picture_structure);

  413.         if (s->progressive_sequence) {

  414.             put_bits(&s->pb, 1, 0); /* no repeat */

  415.         } else {

  416.             put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);

  417.         }

  418.         /* XXX: optimize the generation of this flag with entropy

  419.            measures */

  420.         s->frame_pred_frame_dct = s->progressive_sequence;

  421. 

  422.         put_bits(&s->pb, 1, s->frame_pred_frame_dct);

  423.         put_bits(&s->pb, 1, s->concealment_motion_vectors);

  424.         put_bits(&s->pb, 1, s->q_scale_type);

  425.         put_bits(&s->pb, 1, s->intra_vlc_format);

  426.         put_bits(&s->pb, 1, s->alternate_scan);

  427.         put_bits(&s->pb, 1, s->repeat_first_field);

  428.         s->progressive_frame = s->progressive_sequence;

  429.         put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */

  430.         put_bits(&s->pb, 1, s->progressive_frame);

  431.         put_bits(&s->pb, 1, 0); //composite_display_flag

  432.     }

  433.     if (s->scan_offset) {

  434.         int i;

  435. 

  436.         put_header(s, USER_START_CODE);

  437.         for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){

  438.             put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);

  439.         }

  440.     }

  441. 

  442.     s->mb_y=0;

  443.     ff_mpeg1_encode_slice_header(s);

  444. }

  445. 

  446. static inline void put_mb_modes(MpegEncContext *s, int n, int bits,

  447.                                 int has_mv, int field_motion)

  448. {

  449.     put_bits(&s->pb, n, bits);

  450.     if (!s->frame_pred_frame_dct) {

  451.         if (has_mv)

  452.             put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */

  453.         put_bits(&s->pb, 1, s->interlaced_dct);

  454.     }

  455. }

  456. 

  457. static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,

  458.                                                    DCTELEM block[6][64],

  459.                                                    int motion_x, int motion_y,

  460.                                                    int mb_block_count)

  461. {

  462.     int i, cbp;

  463.     const int mb_x = s->mb_x;

  464.     const int mb_y = s->mb_y;

  465.     const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;

  466. 

  467.     /* compute cbp */

  468.     cbp = 0;

  469.     for(i=0;i<mb_block_count;i++) {

  470.         if (s->block_last_index[i] >= 0)

  471.             cbp |= 1 << (mb_block_count - 1 - i);

  472.     }

  473. 

  474.     if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&

  475.         (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&

  476.         ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||

  477.         (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |

  478.         ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {

  479.         s->mb_skip_run++;

  480.         s->qscale -= s->dquant;

  481.         s->skip_count++;

  482.         s->misc_bits++;

  483.         s->last_bits++;

  484.         if(s->pict_type == AV_PICTURE_TYPE_P){

  485.             s->last_mv[0][1][0]= s->last_mv[0][0][0]=

  486.             s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;

  487.         }

  488.     } else {

  489.         if(first_mb){

  490.             av_assert0(s->mb_skip_run == 0);

  491.             encode_mb_skip_run(s, s->mb_x);

  492.         }else{

  493.             encode_mb_skip_run(s, s->mb_skip_run);

  494.         }

  495. 

  496.         if (s->pict_type == AV_PICTURE_TYPE_I) {

  497.             if(s->dquant && cbp){

  498.                 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */

  499.                 put_qscale(s);

  500.             }else{

  501.                 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */

  502.                 s->qscale -= s->dquant;

  503.             }

  504.             s->misc_bits+= get_bits_diff(s);

  505.             s->i_count++;

  506.         } else if (s->mb_intra) {

  507.             if(s->dquant && cbp){

  508.                 put_mb_modes(s, 6, 0x01, 0, 0);

  509.                 put_qscale(s);

  510.             }else{

  511.                 put_mb_modes(s, 5, 0x03, 0, 0);

  512.                 s->qscale -= s->dquant;

  513.             }

  514.             s->misc_bits+= get_bits_diff(s);

  515.             s->i_count++;

  516.             memset(s->last_mv, 0, sizeof(s->last_mv));

  517.         } else if (s->pict_type == AV_PICTURE_TYPE_P) {

  518.             if(s->mv_type == MV_TYPE_16X16){

  519.                 if (cbp != 0) {

  520.                     if ((motion_x|motion_y) == 0) {

  521.                         if(s->dquant){

  522.                             put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */

  523.                             put_qscale(s);

  524.                         }else{

  525.                             put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */

  526.                         }

  527.                         s->misc_bits+= get_bits_diff(s);

  528.                     } else {

  529.                         if(s->dquant){

  530.                             put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */

  531.                             put_qscale(s);

  532.                         }else{

  533.                             put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */

  534.                         }

  535.                         s->misc_bits+= get_bits_diff(s);

  536.                         mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);    // RAL: f_code parameter added

  537.                         mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);    // RAL: f_code parameter added

  538.                         s->mv_bits+= get_bits_diff(s);

  539.                     }

  540.                 } else {

  541.                     put_bits(&s->pb, 3, 1); /* motion only */

  542.                     if (!s->frame_pred_frame_dct)

  543.                         put_bits(&s->pb, 2, 2); /* motion_type: frame */

  544.                     s->misc_bits+= get_bits_diff(s);

  545.                     mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);    // RAL: f_code parameter added

  546.                     mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);    // RAL: f_code parameter added

  547.                     s->qscale -= s->dquant;

  548.                     s->mv_bits+= get_bits_diff(s);

  549.                 }

  550.                 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;

  551.                 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;

  552.             }else{

  553.                 av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);

  554. 

  555.                 if (cbp) {

  556.                     if(s->dquant){

  557.                         put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */

  558.                         put_qscale(s);

  559.                     }else{

  560.                         put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */

  561.                     }

  562.                 } else {

  563.                     put_bits(&s->pb, 3, 1); /* motion only */

  564.                     put_bits(&s->pb, 2, 1); /* motion_type: field */

  565.                     s->qscale -= s->dquant;

  566.                 }

  567.                 s->misc_bits+= get_bits_diff(s);

  568.                 for(i=0; i<2; i++){

  569.                     put_bits(&s->pb, 1, s->field_select[0][i]);

  570.                     mpeg1_encode_motion(s, s->mv[0][i][0] -  s->last_mv[0][i][0]    , s->f_code);

  571.                     mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);

  572.                     s->last_mv[0][i][0]=   s->mv[0][i][0];

  573.                     s->last_mv[0][i][1]= 2*s->mv[0][i][1];

  574.                 }

  575.                 s->mv_bits+= get_bits_diff(s);

  576.             }

  577.             if(cbp) {

  578.                 if (s->chroma_y_shift) {

  579.                     put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);

  580.                 } else {

  581.                     put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);

  582.                     put_sbits(&s->pb, 2, cbp);

  583.                 }

  584.             }

  585.             s->f_count++;

  586.         } else{

  587.             if(s->mv_type == MV_TYPE_16X16){

  588.                 if (cbp){    // With coded bloc pattern

  589.                     if (s->dquant) {

  590.                         if(s->mv_dir == MV_DIR_FORWARD)

  591.                             put_mb_modes(s, 6, 3, 1, 0);

  592.                         else

  593.                             put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);

  594.                         put_qscale(s);

  595.                     } else {

  596.                         put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);

  597.                     }

  598.                 }else{    // No coded bloc pattern

  599.                     put_bits(&s->pb, 5-s->mv_dir, 2);

  600.                     if (!s->frame_pred_frame_dct)

  601.                         put_bits(&s->pb, 2, 2); /* motion_type: frame */

  602.                     s->qscale -= s->dquant;

  603.                 }

  604.                 s->misc_bits += get_bits_diff(s);

  605.                 if (s->mv_dir&MV_DIR_FORWARD){

  606.                     mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);

  607.                     mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);

  608.                     s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];

  609.                     s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];

  610.                     s->f_count++;

  611.                 }

  612.                 if (s->mv_dir&MV_DIR_BACKWARD){

  613.                     mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);

  614.                     mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);

  615.                     s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];

  616.                     s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];

  617.                     s->b_count++;

  618.                 }

  619.             }else{

  620.                 av_assert2(s->mv_type == MV_TYPE_FIELD);

  621.                 av_assert2(!s->frame_pred_frame_dct);

  622.                 if (cbp){    // With coded bloc pattern

  623.                     if (s->dquant) {

  624.                         if(s->mv_dir == MV_DIR_FORWARD)

  625.                             put_mb_modes(s, 6, 3, 1, 1);

  626.                         else

  627.                             put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);

  628.                         put_qscale(s);

  629.                     } else {

  630.                         put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);

  631.                     }

  632.                 }else{    // No coded bloc pattern

  633.                     put_bits(&s->pb, 5-s->mv_dir, 2);

  634.                     put_bits(&s->pb, 2, 1); /* motion_type: field */

  635.                     s->qscale -= s->dquant;

  636.                 }

  637.                 s->misc_bits += get_bits_diff(s);

  638.                 if (s->mv_dir&MV_DIR_FORWARD){

  639.                     for(i=0; i<2; i++){

  640.                         put_bits(&s->pb, 1, s->field_select[0][i]);

  641.                         mpeg1_encode_motion(s, s->mv[0][i][0] -  s->last_mv[0][i][0]    , s->f_code);

  642.                         mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);

  643.                         s->last_mv[0][i][0]=   s->mv[0][i][0];

  644.                         s->last_mv[0][i][1]= 2*s->mv[0][i][1];

  645.                     }

  646.                     s->f_count++;

  647.                 }

  648.                 if (s->mv_dir&MV_DIR_BACKWARD){

  649.                     for(i=0; i<2; i++){

  650.                         put_bits(&s->pb, 1, s->field_select[1][i]);

  651.                         mpeg1_encode_motion(s, s->mv[1][i][0] -  s->last_mv[1][i][0]    , s->b_code);

  652.                         mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);

  653.                         s->last_mv[1][i][0]=   s->mv[1][i][0];

  654.                         s->last_mv[1][i][1]= 2*s->mv[1][i][1];

  655.                     }

  656.                     s->b_count++;

  657.                 }

  658.             }

  659.             s->mv_bits += get_bits_diff(s);

  660.             if(cbp) {

  661.                 if (s->chroma_y_shift) {

  662.                     put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);

  663.                 } else {

  664.                     put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);

  665.                     put_sbits(&s->pb, 2, cbp);

  666.                 }

  667.             }

  668.         }

  669.         for(i=0;i<mb_block_count;i++) {

  670.             if (cbp & (1 << (mb_block_count - 1 - i))) {

  671.                 mpeg1_encode_block(s, block[i], i);

  672.             }

  673.         }

  674.         s->mb_skip_run = 0;

  675.         if(s->mb_intra)

  676.             s->i_tex_bits+= get_bits_diff(s);

  677.         else

  678.             s->p_tex_bits+= get_bits_diff(s);

  679.     }

  680. }

  681. 

  682. void ff_mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)

  683. {

  684.     if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);

  685.     else                                mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);

  686. }

  687. 

  688. // RAL: Parameter added: f_or_b_code

  689. static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)

  690. {

  691.     if (val == 0) {

  692.         /* zero vector */

  693.         put_bits(&s->pb,

  694.                  ff_mpeg12_mbMotionVectorTable[0][1],

  695.                  ff_mpeg12_mbMotionVectorTable[0][0]);

  696.     } else {

  697.         int code, sign, bits;

  698.         int bit_size = f_or_b_code - 1;

  699.         int range = 1 << bit_size;

  700.         /* modulo encoding */

  701.         val = sign_extend(val, 5 + bit_size);

  702. 

  703.         if (val >= 0) {

  704.             val--;

  705.             code = (val >> bit_size) + 1;

  706.             bits = val & (range - 1);

  707.             sign = 0;

  708.         } else {

  709.             val = -val;

  710.             val--;

  711.             code = (val >> bit_size) + 1;

  712.             bits = val & (range - 1);

  713.             sign = 1;

  714.         }

  715. 

  716.         av_assert2(code > 0 && code <= 16);

  717. 

  718.         put_bits(&s->pb,

  719.                  ff_mpeg12_mbMotionVectorTable[code][1],

  720.                  ff_mpeg12_mbMotionVectorTable[code][0]);

  721. 

  722.         put_bits(&s->pb, 1, sign);

  723.         if (bit_size > 0) {

  724.             put_bits(&s->pb, bit_size, bits);

  725.         }

  726.     }

  727. }

  728. 

  729. void ff_mpeg1_encode_init(MpegEncContext *s)

  730. {

  731.     static int done=0;

  732. 

  733.     ff_mpeg12_common_init(s);

  734. 

  735.     if(!done){

  736.         int f_code;

  737.         int mv;

  738.         int i;

  739. 

  740.         done=1;

  741.         ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);

  742.         ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);

  743. 

  744.         for(i=0; i<64; i++)

  745.         {

  746.                 mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i];

  747.                 mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i];

  748.         }

  749. 

  750.         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);

  751.         if(s->intra_vlc_format)

  752.             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);

  753. 

  754.         /* build unified dc encoding tables */

  755.         for(i=-255; i<256; i++)

  756.         {

  757.                 int adiff, index;

  758.                 int bits, code;

  759.                 int diff=i;

  760. 

  761.                 adiff = FFABS(diff);

  762.                 if(diff<0) diff--;

  763.                 index = av_log2(2*adiff);

  764. 

  765.                 bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;

  766.                 code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));

  767.                 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);

  768. 

  769.                 bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;

  770.                 code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));

  771.                 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);

  772.         }

  773. 

  774.         for(f_code=1; f_code<=MAX_FCODE; f_code++){

  775.             for(mv=-MAX_MV; mv<=MAX_MV; mv++){

  776.                 int len;

  777. 

  778.                 if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];

  779.                 else{

  780.                     int val, bit_size, code;

  781. 

  782.                     bit_size = f_code - 1;

  783. 

  784.                     val=mv;

  785.                     if (val < 0)

  786.                         val = -val;

  787.                     val--;

  788.                     code = (val >> bit_size) + 1;

  789.                     if(code<17){

  790.                         len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;

  791.                     }else{

  792.                         len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;

  793.                     }

  794.                 }

  795. 

  796.                 mv_penalty[f_code][mv+MAX_MV]= len;

  797.             }

  798.         }

  799. 

  800. 

  801.         for(f_code=MAX_FCODE; f_code>0; f_code--){

  802.             for(mv=-(8<<f_code); mv<(8<<f_code); mv++){

  803.                 fcode_tab[mv+MAX_MV]= f_code;

  804.             }

  805.         }

  806.     }

  807.     s->me.mv_penalty= mv_penalty;

  808.     s->fcode_tab= fcode_tab;

  809.     if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){

  810.         s->min_qcoeff=-255;

  811.         s->max_qcoeff= 255;

  812.     }else{

  813.         s->min_qcoeff=-2047;

  814.         s->max_qcoeff= 2047;

  815.     }

  816.     if (s->intra_vlc_format) {

  817.         s->intra_ac_vlc_length=

  818.         s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;

  819.     } else {

  820.         s->intra_ac_vlc_length=

  821.         s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;

  822.     }

  823.     s->inter_ac_vlc_length=

  824.     s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;

  825. }

  826. 

  827. static inline void encode_dc(MpegEncContext *s, int diff, int component)

  828. {

  829.   if(((unsigned) (diff+255)) >= 511){

  830.         int index;

  831. 

  832.         if(diff<0){

  833.             index= av_log2_16bit(-2*diff);

  834.             diff--;

  835.         }else{

  836.             index= av_log2_16bit(2*diff);

  837.         }

  838.         if (component == 0) {

  839.             put_bits(

  840.                 &s->pb,

  841.                 ff_mpeg12_vlc_dc_lum_bits[index] + index,

  842.                 (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));

  843.         }else{

  844.             put_bits(

  845.                 &s->pb,

  846.                 ff_mpeg12_vlc_dc_chroma_bits[index] + index,

  847.                 (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));

  848.         }

  849.   }else{

  850.     if (component == 0) {

  851.         put_bits(

  852.             &s->pb,

  853.             mpeg1_lum_dc_uni[diff+255]&0xFF,

  854.             mpeg1_lum_dc_uni[diff+255]>>8);

  855.     } else {

  856.         put_bits(

  857.             &s->pb,

  858.             mpeg1_chr_dc_uni[diff+255]&0xFF,

  859.             mpeg1_chr_dc_uni[diff+255]>>8);

  860.     }

  861.   }

  862. }

  863. 

  864. static void mpeg1_encode_block(MpegEncContext *s,

  865.                                DCTELEM *block,

  866.                                int n)

  867. {

  868.     int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;

  869.     int code, component;

  870.     const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;

  871. 

  872.     last_index = s->block_last_index[n];

  873. 

  874.     /* DC coef */

  875.     if (s->mb_intra) {

  876.         component = (n <= 3 ? 0 : (n&1) + 1);

  877.         dc = block[0]; /* overflow is impossible */

  878.         diff = dc - s->last_dc[component];

  879.         encode_dc(s, diff, component);

  880.         s->last_dc[component] = dc;

  881.         i = 1;

  882.         if (s->intra_vlc_format)

  883.             table_vlc = ff_rl_mpeg2.table_vlc;

  884.     } else {

  885.         /* encode the first coefficient : needs to be done here because

  886.            it is handled slightly differently */

  887.         level = block[0];

  888.         if (abs(level) == 1) {

  889.                 code = ((uint32_t)level >> 31); /* the sign bit */

  890.                 put_bits(&s->pb, 2, code | 0x02);

  891.                 i = 1;

  892.         } else {

  893.             i = 0;

  894.             last_non_zero = -1;

  895.             goto next_coef;

  896.         }

  897.     }

  898. 

  899.     /* now quantify & encode AC coefs */

  900.     last_non_zero = i - 1;

  901. 

  902.     for(;i<=last_index;i++) {

  903.         j = s->intra_scantable.permutated[i];

  904.         level = block[j];

  905.     next_coef:

  906.         /* encode using VLC */

  907.         if (level != 0) {

  908.             run = i - last_non_zero - 1;

  909. 

  910.             alevel= level;

  911.             MASK_ABS(sign, alevel);

  912.             sign&=1;

  913. 

  914.             if (alevel <= mpeg1_max_level[0][run]){

  915.                 code= mpeg1_index_run[0][run] + alevel - 1;

  916.                 /* store the vlc & sign at once */

  917.                 put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);

  918.             } else {

  919.                 /* escape seems to be pretty rare <5% so I do not optimize it */

  920.                 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);

  921.                 /* escape: only clip in this case */

  922.                 put_bits(&s->pb, 6, run);

  923.                 if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){

  924.                     if (alevel < 128) {

  925.                         put_sbits(&s->pb, 8, level);

  926.                     } else {

  927.                         if (level < 0) {

  928.                             put_bits(&s->pb, 16, 0x8001 + level + 255);

  929.                         } else {

  930.                             put_sbits(&s->pb, 16, level);

  931.                         }

  932.                     }

  933.                 }else{

  934.                     put_sbits(&s->pb, 12, level);

  935.                 }

  936.             }

  937.             last_non_zero = i;

  938.         }

  939.     }

  940.     /* end of block */

  941.     put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);

  942. }

  943. 

  944. #define OFFSET(x) offsetof(MpegEncContext, x)

  945. #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM

  946. #define COMMON_OPTS\

  947.     { "gop_timecode",        "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\

  948.     { "intra_vlc",           "Use MPEG-2 intra VLC table.",       OFFSET(intra_vlc_format),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },\

  949.     { "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE}, \

  950.     { "scan_offset",         "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },

  951. 

  952. static const AVOption mpeg1_options[] = {

  953.     COMMON_OPTS

  954.     FF_MPV_COMMON_OPTS

  955.     { NULL },

  956. };

  957. 

  958. static const AVOption mpeg2_options[] = {

  959.     COMMON_OPTS

  960.     { "non_linear_quant",    "Use nonlinear quantizer.",          OFFSET(q_scale_type),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },

  961.     { "alternate_scan",      "Enable alternate scantable.",       OFFSET(alternate_scan),       AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },

  962.     FF_MPV_COMMON_OPTS

  963.     { NULL },

  964. };

  965. 

  966. #define mpeg12_class(x)\

  967. static const AVClass mpeg## x ##_class = {\

  968.     .class_name   = "mpeg" #x "video encoder",\

  969.     .item_name    = av_default_item_name,\

  970.     .option       = mpeg## x ##_options,\

  971.     .version      = LIBAVUTIL_VERSION_INT,\

  972. };

  973. 

  974. mpeg12_class(1)

  975. mpeg12_class(2)

  976. 

  977. AVCodec ff_mpeg1video_encoder = {

  978.     .name                 = "mpeg1video",

  979.     .type                 = AVMEDIA_TYPE_VIDEO,

  980.     .id                   = AV_CODEC_ID_MPEG1VIDEO,

  981.     .priv_data_size       = sizeof(MpegEncContext),

  982.     .init                 = encode_init,

  983.     .encode2              = ff_MPV_encode_picture,

  984.     .close                = ff_MPV_encode_end,

  985.     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,

  986.     .pix_fmts             = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,

  987.                                                         AV_PIX_FMT_NONE },

  988.     .capabilities         = CODEC_CAP_DELAY,

  989.     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),

  990.     .priv_class           = &mpeg1_class,

  991. };

  992. 

  993. AVCodec ff_mpeg2video_encoder = {

  994.     .name                 = "mpeg2video",

  995.     .type                 = AVMEDIA_TYPE_VIDEO,

  996.     .id                   = AV_CODEC_ID_MPEG2VIDEO,

  997.     .priv_data_size       = sizeof(MpegEncContext),

  998.     .init                 = encode_init,

  999.     .encode2              = ff_MPV_encode_picture,

  1000.     .close                = ff_MPV_encode_end,

  1001.     .supported_framerates = ff_mpeg2_frame_rate_tab,

  1002.     .pix_fmts             = (const enum AVPixelFormat[]){

  1003.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE

  1004.     },

  1005.     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,

  1006.     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),

  1007.     .priv_class           = &mpeg2_class,

  1008. };