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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.                          int16_t *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 (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)

  149.         avctx->thread_count = 1;

  150. 

  151.     if(ff_MPV_encode_init(avctx) < 0)

  152.         return -1;

  153. 

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

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

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

  157.             return -1;

  158.         }else{

  159.             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);

  160.         }

  161.     }

  162. 

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

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

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

  166.             return -1;

  167.         }

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

  169.     }

  170. 

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

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

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

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

  175.         }else{

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

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

  178.                 return -1;

  179.             }

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

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

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

  183.         }

  184.     }

  185. 

  186.     if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {

  187.         av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");

  188.         return AVERROR(EINVAL);

  189.     }

  190. 

  191.     if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {

  192.         if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {

  193.             av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiplies of 4096\n"

  194.                                         "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);

  195.             return AVERROR(EINVAL);

  196.         }

  197.     }

  198. 

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

  200.     if (s->drop_frame_timecode)

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

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

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

  204.         return -1;

  205.     }

  206. 

  207.     if (s->tc_opt_str) {

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

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

  210.         if (ret < 0)

  211.             return ret;

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

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

  214.     } else {

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

  216.     }

  217.     return 0;

  218. }

  219. 

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

  221. {

  222.     avpriv_align_put_bits(&s->pb);

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

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

  225. }

  226. 

  227. /* put sequence header if needed */

  228. static void mpeg1_encode_sequence_header(MpegEncContext *s)

  229. {

  230.         unsigned int vbv_buffer_size;

  231.         unsigned int fps, v;

  232.         int i;

  233.         uint64_t time_code;

  234.         float best_aspect_error= 1E10;

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

  236.         int constraint_parameter_flag;

  237. 

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

  239. 

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

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

  242. 

  243.             /* mpeg1 header repeated every gop */

  244.             put_header(s, SEQ_START_CODE);

  245. 

  246.             put_sbits(&s->pb, 12, s->width  & 0xFFF);

  247.             put_sbits(&s->pb, 12, s->height & 0xFFF);

  248. 

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

  250.                 float error= aspect_ratio;

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

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

  253.                 else

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

  255. 

  256.                 error= FFABS(error);

  257. 

  258.                 if(error < best_aspect_error){

  259.                     best_aspect_error= error;

  260.                     s->aspect_ratio_info= i;

  261.                 }

  262.             }

  263. 

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

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

  266. 

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

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

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

  270.                     v = 0x3ffff;

  271.             }else{

  272.                 v= 0x3FFFF;

  273.             }

  274. 

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

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

  277.             else

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

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

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

  281. 

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

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

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

  285. 

  286.             constraint_parameter_flag=

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

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

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

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

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

  292.                 vbv_buffer_size <= 20 &&

  293.                 v <= 1856000/400 &&

  294.                 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;

  295. 

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

  297. 

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

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

  300. 

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

  302.                 put_header(s, EXT_START_CODE);

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

  304. 

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

  306. 

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

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

  309. 

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

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

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

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

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

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

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

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

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

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

  320.             }

  321. 

  322.             put_header(s, GOP_START_CODE);

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

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

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

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

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

  328. 

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

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

  331.             if (s->drop_frame_timecode)

  332.                 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);

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

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

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

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

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

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

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

  340.         }

  341. }

  342. 

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

  344.     while (run >= 33) {

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

  346.         run -= 33;

  347.     }

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

  349.              ff_mpeg12_mbAddrIncrTable[run][0]);

  350. }

  351. 

  352. static av_always_inline void put_qscale(MpegEncContext *s)

  353. {

  354.     if(s->q_scale_type){

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

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

  357.     }else{

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

  359.     }

  360. }

  361. 

  362. void ff_mpeg1_encode_slice_header(MpegEncContext *s){

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

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

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

  366.     } else {

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

  368.     }

  369.     put_qscale(s);

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

  371. }

  372. 

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

  374. {

  375.     mpeg1_encode_sequence_header(s);

  376. 

  377.     /* mpeg1 picture header */

  378.     put_header(s, PICTURE_START_CODE);

  379.     /* temporal reference */

  380. 

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

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

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

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

  385. 

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

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

  388. 

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

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

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

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

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

  394.         else

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

  396.     }

  397. 

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

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

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

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

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

  403.         else

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

  405.     }

  406. 

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

  408. 

  409.     s->frame_pred_frame_dct = 1;

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

  411.         put_header(s, EXT_START_CODE);

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

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

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

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

  416.         }else{

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

  418.         }

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

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

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

  422.         }else{

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

  424.         }

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

  426. 

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

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

  429.         if (s->progressive_sequence) {

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

  431.         } else {

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

  433.         }

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

  435.            measures */

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

  437. 

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

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

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

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

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

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

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

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

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

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

  448.     }

  449.     if (s->scan_offset) {

  450.         int i;

  451. 

  452.         put_header(s, USER_START_CODE);

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

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

  455.         }

  456.     }

  457. 

  458.     s->mb_y=0;

  459.     ff_mpeg1_encode_slice_header(s);

  460. }

  461. 

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

  463.                                 int has_mv, int field_motion)

  464. {

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

  466.     if (!s->frame_pred_frame_dct) {

  467.         if (has_mv)

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

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

  470.     }

  471. }

  472. 

  473. static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,

  474.                                                    int16_t block[6][64],

  475.                                                    int motion_x, int motion_y,

  476.                                                    int mb_block_count)

  477. {

  478.     int i, cbp;

  479.     const int mb_x = s->mb_x;

  480.     const int mb_y = s->mb_y;

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

  482. 

  483.     /* compute cbp */

  484.     cbp = 0;

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

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

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

  488.     }

  489. 

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

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

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

  493.         (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) |

  494.         ((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))) {

  495.         s->mb_skip_run++;

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

  497.         s->skip_count++;

  498.         s->misc_bits++;

  499.         s->last_bits++;

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

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

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

  503.         }

  504.     } else {

  505.         if(first_mb){

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

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

  508.         }else{

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

  510.         }

  511. 

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

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

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

  515.                 put_qscale(s);

  516.             }else{

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

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

  519.             }

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

  521.             s->i_count++;

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

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

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

  525.                 put_qscale(s);

  526.             }else{

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

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

  529.             }

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

  531.             s->i_count++;

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

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

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

  535.                 if (cbp != 0) {

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

  537.                         if(s->dquant){

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

  539.                             put_qscale(s);

  540.                         }else{

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

  542.                         }

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

  544.                     } else {

  545.                         if(s->dquant){

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

  547.                             put_qscale(s);

  548.                         }else{

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

  550.                         }

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

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

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

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

  555.                     }

  556.                 } else {

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

  558.                     if (!s->frame_pred_frame_dct)

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

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

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

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

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

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

  565.                 }

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

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

  568.             }else{

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

  570. 

  571.                 if (cbp) {

  572.                     if(s->dquant){

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

  574.                         put_qscale(s);

  575.                     }else{

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

  577.                     }

  578.                 } else {

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

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

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

  582.                 }

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

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

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

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

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

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

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

  590.                 }

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

  592.             }

  593.             if(cbp) {

  594.                 if (s->chroma_y_shift) {

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

  596.                 } else {

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

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

  599.                 }

  600.             }

  601.             s->f_count++;

  602.         } else{

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

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

  605.                     if (s->dquant) {

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

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

  608.                         else

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

  610.                         put_qscale(s);

  611.                     } else {

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

  613.                     }

  614.                 }else{    // No coded bloc pattern

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

  616.                     if (!s->frame_pred_frame_dct)

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

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

  619.                 }

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

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

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

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

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

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

  626.                     s->f_count++;

  627.                 }

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

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

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

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

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

  633.                     s->b_count++;

  634.                 }

  635.             }else{

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

  637.                 av_assert2(!s->frame_pred_frame_dct);

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

  639.                     if (s->dquant) {

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

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

  642.                         else

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

  644.                         put_qscale(s);

  645.                     } else {

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

  647.                     }

  648.                 }else{    // No coded bloc pattern

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

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

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

  652.                 }

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

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

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

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

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

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

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

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

  661.                     }

  662.                     s->f_count++;

  663.                 }

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

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

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

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

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

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

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

  671.                     }

  672.                     s->b_count++;

  673.                 }

  674.             }

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

  676.             if(cbp) {

  677.                 if (s->chroma_y_shift) {

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

  679.                 } else {

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

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

  682.                 }

  683.             }

  684.         }

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

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

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

  688.             }

  689.         }

  690.         s->mb_skip_run = 0;

  691.         if(s->mb_intra)

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

  693.         else

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

  695.     }

  696. }

  697. 

  698. void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)

  699. {

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

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

  702. }

  703. 

  704. // RAL: Parameter added: f_or_b_code

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

  706. {

  707.     if (val == 0) {

  708.         /* zero vector */

  709.         put_bits(&s->pb,

  710.                  ff_mpeg12_mbMotionVectorTable[0][1],

  711.                  ff_mpeg12_mbMotionVectorTable[0][0]);

  712.     } else {

  713.         int code, sign, bits;

  714.         int bit_size = f_or_b_code - 1;

  715.         int range = 1 << bit_size;

  716.         /* modulo encoding */

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

  718. 

  719.         if (val >= 0) {

  720.             val--;

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

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

  723.             sign = 0;

  724.         } else {

  725.             val = -val;

  726.             val--;

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

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

  729.             sign = 1;

  730.         }

  731. 

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

  733. 

  734.         put_bits(&s->pb,

  735.                  ff_mpeg12_mbMotionVectorTable[code][1],

  736.                  ff_mpeg12_mbMotionVectorTable[code][0]);

  737. 

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

  739.         if (bit_size > 0) {

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

  741.         }

  742.     }

  743. }

  744. 

  745. void ff_mpeg1_encode_init(MpegEncContext *s)

  746. {

  747.     static int done=0;

  748. 

  749.     ff_mpeg12_common_init(s);

  750. 

  751.     if(!done){

  752.         int f_code;

  753.         int mv;

  754.         int i;

  755. 

  756.         done=1;

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

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

  759. 

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

  761.         {

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

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

  764.         }

  765. 

  766.         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);

  767.         if(s->intra_vlc_format)

  768.             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);

  769. 

  770.         /* build unified dc encoding tables */

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

  772.         {

  773.                 int adiff, index;

  774.                 int bits, code;

  775.                 int diff=i;

  776. 

  777.                 adiff = FFABS(diff);

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

  779.                 index = av_log2(2*adiff);

  780. 

  781.                 bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;

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

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

  784. 

  785.                 bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;

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

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

  788.         }

  789. 

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

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

  792.                 int len;

  793. 

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

  795.                 else{

  796.                     int val, bit_size, code;

  797. 

  798.                     bit_size = f_code - 1;

  799. 

  800.                     val=mv;

  801.                     if (val < 0)

  802.                         val = -val;

  803.                     val--;

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

  805.                     if(code<17){

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

  807.                     }else{

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

  809.                     }

  810.                 }

  811. 

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

  813.             }

  814.         }

  815. 

  816. 

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

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

  819.                 fcode_tab[mv+MAX_MV]= f_code;

  820.             }

  821.         }

  822.     }

  823.     s->me.mv_penalty= mv_penalty;

  824.     s->fcode_tab= fcode_tab;

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

  826.         s->min_qcoeff=-255;

  827.         s->max_qcoeff= 255;

  828.     }else{

  829.         s->min_qcoeff=-2047;

  830.         s->max_qcoeff= 2047;

  831.     }

  832.     if (s->intra_vlc_format) {

  833.         s->intra_ac_vlc_length=

  834.         s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;

  835.     } else {

  836.         s->intra_ac_vlc_length=

  837.         s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;

  838.     }

  839.     s->inter_ac_vlc_length=

  840.     s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;

  841. }

  842. 

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

  844. {

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

  846.         int index;

  847. 

  848.         if(diff<0){

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

  850.             diff--;

  851.         }else{

  852.             index= av_log2_16bit(2*diff);

  853.         }

  854.         if (component == 0) {

  855.             put_bits(

  856.                 &s->pb,

  857.                 ff_mpeg12_vlc_dc_lum_bits[index] + index,

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

  859.         }else{

  860.             put_bits(

  861.                 &s->pb,

  862.                 ff_mpeg12_vlc_dc_chroma_bits[index] + index,

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

  864.         }

  865.   }else{

  866.     if (component == 0) {

  867.         put_bits(

  868.             &s->pb,

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

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

  871.     } else {

  872.         put_bits(

  873.             &s->pb,

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

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

  876.     }

  877.   }

  878. }

  879. 

  880. static void mpeg1_encode_block(MpegEncContext *s,

  881.                                int16_t *block,

  882.                                int n)

  883. {

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

  885.     int code, component;

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

  887. 

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

  889. 

  890.     /* DC coef */

  891.     if (s->mb_intra) {

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

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

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

  895.         encode_dc(s, diff, component);

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

  897.         i = 1;

  898.         if (s->intra_vlc_format)

  899.             table_vlc = ff_rl_mpeg2.table_vlc;

  900.     } else {

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

  902.            it is handled slightly differently */

  903.         level = block[0];

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

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

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

  907.                 i = 1;

  908.         } else {

  909.             i = 0;

  910.             last_non_zero = -1;

  911.             goto next_coef;

  912.         }

  913.     }

  914. 

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

  916.     last_non_zero = i - 1;

  917. 

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

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

  920.         level = block[j];

  921.     next_coef:

  922.         /* encode using VLC */

  923.         if (level != 0) {

  924.             run = i - last_non_zero - 1;

  925. 

  926.             alevel= level;

  927.             MASK_ABS(sign, alevel);

  928.             sign&=1;

  929. 

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

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

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

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

  934.             } else {

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

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

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

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

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

  940.                     if (alevel < 128) {

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

  942.                     } else {

  943.                         if (level < 0) {

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

  945.                         } else {

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

  947.                         }

  948.                     }

  949.                 }else{

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

  951.                 }

  952.             }

  953.             last_non_zero = i;

  954.         }

  955.     }

  956.     /* end of block */

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

  958. }

  959. 

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

  961. #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM

  962. #define COMMON_OPTS\

  963.     { "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 },\

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

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

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

  967. 

  968. static const AVOption mpeg1_options[] = {

  969.     COMMON_OPTS

  970.     FF_MPV_COMMON_OPTS

  971.     { NULL },

  972. };

  973. 

  974. static const AVOption mpeg2_options[] = {

  975.     COMMON_OPTS

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

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

  978.     FF_MPV_COMMON_OPTS

  979.     { NULL },

  980. };

  981. 

  982. #define mpeg12_class(x)\

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

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

  985.     .item_name    = av_default_item_name,\

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

  987.     .version      = LIBAVUTIL_VERSION_INT,\

  988. };

  989. 

  990. mpeg12_class(1)

  991. mpeg12_class(2)

  992. 

  993. AVCodec ff_mpeg1video_encoder = {

  994.     .name                 = "mpeg1video",

  995.     .type                 = AVMEDIA_TYPE_VIDEO,

  996.     .id                   = AV_CODEC_ID_MPEG1VIDEO,

  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_mpeg12_frame_rate_tab + 1,

  1002.     .pix_fmts             = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,

  1003.                                                         AV_PIX_FMT_NONE },

  1004.     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,

  1005.     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),

  1006.     .priv_class           = &mpeg1_class,

  1007. };

  1008. 

  1009. AVCodec ff_mpeg2video_encoder = {

  1010.     .name                 = "mpeg2video",

  1011.     .type                 = AVMEDIA_TYPE_VIDEO,

  1012.     .id                   = AV_CODEC_ID_MPEG2VIDEO,

  1013.     .priv_data_size       = sizeof(MpegEncContext),

  1014.     .init                 = encode_init,

  1015.     .encode2              = ff_MPV_encode_picture,

  1016.     .close                = ff_MPV_encode_end,

  1017.     .supported_framerates = ff_mpeg2_frame_rate_tab,

  1018.     .pix_fmts             = (const enum AVPixelFormat[]){

  1019.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE

  1020.     },

  1021.     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,

  1022.     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),

  1023.     .priv_class           = &mpeg2_class,

  1024. };