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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 "mathops.h"

  30. #include "mpegvideo.h"

  31. 

  32. #include "mpeg12.h"

  33. #include "mpeg12data.h"

  34. #include "bytestream.h"

  35. #include "libavutil/log.h"

  36. #include "libavutil/opt.h"

  37. #include "libavutil/avassert.h"

  38. #include "libavutil/timecode.h"

  39. 

  40. static const uint8_t inv_non_linear_qscale[13] = {

  41.     0, 2, 4, 6, 8,

  42.     9,10,11,12,13,14,15,16,

  43. };

  44. 

  45. static const uint8_t svcd_scan_offset_placeholder[14] = {

  46.     0x10, 0x0E,

  47.     0x00, 0x80, 0x81,

  48.     0x00, 0x80, 0x81,

  49.     0xff, 0xff, 0xff,

  50.     0xff, 0xff, 0xff,

  51. };

  52. 

  53. static void mpeg1_encode_block(MpegEncContext *s,

  54.                          int16_t *block,

  55.                          int component);

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

  57. 

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

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

  60. 

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

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

  63. 

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

  65. static uint32_t mpeg1_lum_dc_uni[512];

  66. static uint32_t mpeg1_chr_dc_uni[512];

  67. 

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

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

  70. 

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

  72.     int i;

  73. 

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

  75.         int level= i-64;

  76.         int run;

  77.         if (!level)

  78.             continue;

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

  80.             int len, code;

  81. 

  82.             int alevel= FFABS(level);

  83. 

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

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

  86.             else

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

  88. 

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

  90.                 /* length of vlc and sign */

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

  92.             } else {

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

  94. 

  95.                 if (alevel < 128) {

  96.                     len += 8;

  97.                 } else {

  98.                     len += 16;

  99.                 }

  100.             }

  101. 

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

  103.         }

  104.     }

  105. }

  106. 

  107. 

  108. static int find_frame_rate_index(MpegEncContext *s){

  109.     int i;

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

  111.     AVRational ext;

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

  113. 

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

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

  116. 

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

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

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

  120. 

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

  122.                     continue;

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

  124.                     continue;

  125. 

  126.                 if(    bestq.num==0

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

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

  129.                     bestq = q;

  130.                     s->frame_rate_index= i;

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

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

  133.                 }

  134.             }

  135.         }

  136.     }

  137.     if(av_cmp_q(target, bestq))

  138.         return -1;

  139.     else

  140.         return 0;

  141. }

  142. 

  143. static av_cold int encode_init(AVCodecContext *avctx)

  144. {

  145.     MpegEncContext *s = avctx->priv_data;

  146. 

  147.     if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)

  148.         avctx->thread_count = 1;

  149. 

  150.     if(ff_MPV_encode_init(avctx) < 0)

  151.         return -1;

  152. 

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

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

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

  156.             return -1;

  157.         }else{

  158.             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);

  159.         }

  160.     }

  161. 

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

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

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

  165.             return -1;

  166.         }

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

  168.     }

  169. 

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

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

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

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

  174.         }else{

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

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

  177.                 return -1;

  178.             }

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

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

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

  182.         }

  183.     }

  184. 

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

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

  187.         return AVERROR(EINVAL);

  188.     }

  189. 

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

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

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

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

  194.             return AVERROR(EINVAL);

  195.         }

  196.     }

  197. 

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

  199.     if (s->drop_frame_timecode)

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

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

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

  203.         return -1;

  204.     }

  205. 

  206.     if (s->tc_opt_str) {

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

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

  209.         if (ret < 0)

  210.             return ret;

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

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

  213.     } else {

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

  215.     }

  216.     return 0;

  217. }

  218. 

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

  220. {

  221.     avpriv_align_put_bits(&s->pb);

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

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

  224. }

  225. 

  226. /* put sequence header if needed */

  227. static void mpeg1_encode_sequence_header(MpegEncContext *s)

  228. {

  229.         unsigned int vbv_buffer_size;

  230.         unsigned int fps, v;

  231.         int i;

  232.         uint64_t time_code;

  233.         float best_aspect_error= 1E10;

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

  235.         int constraint_parameter_flag;

  236. 

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

  238. 

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

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

  241. 

  242.             /* mpeg1 header repeated every gop */

  243.             put_header(s, SEQ_START_CODE);

  244. 

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

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

  247. 

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

  249.                 float error= aspect_ratio;

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

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

  252.                 else

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

  254. 

  255.                 error= FFABS(error);

  256. 

  257.                 if(error < best_aspect_error){

  258.                     best_aspect_error= error;

  259.                     s->aspect_ratio_info= i;

  260.                 }

  261.             }

  262. 

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

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

  265. 

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

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

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

  269.                     v = 0x3ffff;

  270.             }else{

  271.                 v= 0x3FFFF;

  272.             }

  273. 

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

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

  276.             else

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

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

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

  280. 

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

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

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

  284. 

  285.             constraint_parameter_flag=

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

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

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

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

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

  291.                 vbv_buffer_size <= 20 &&

  292.                 v <= 1856000/400 &&

  293.                 s->codec_id == AV_CODEC_ID_MPEG1VIDEO;

  294. 

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

  296. 

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

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

  299. 

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

  301.                 put_header(s, EXT_START_CODE);

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

  303. 

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

  305. 

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

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

  308. 

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

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

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

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

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

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

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

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

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

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

  319.             }

  320. 

  321.             put_header(s, GOP_START_CODE);

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

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

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

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

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

  327. 

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

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

  330.             if (s->drop_frame_timecode)

  331.                 time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);

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

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

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

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

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

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

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

  339.         }

  340. }

  341. 

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

  343.     while (run >= 33) {

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

  345.         run -= 33;

  346.     }

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

  348.              ff_mpeg12_mbAddrIncrTable[run][0]);

  349. }

  350. 

  351. static av_always_inline void put_qscale(MpegEncContext *s)

  352. {

  353.     if(s->q_scale_type){

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

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

  356.     }else{

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

  358.     }

  359. }

  360. 

  361. void ff_mpeg1_encode_slice_header(MpegEncContext *s){

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

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

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

  365.     } else {

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

  367.     }

  368.     put_qscale(s);

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

  370. }

  371. 

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

  373. {

  374.     mpeg1_encode_sequence_header(s);

  375. 

  376.     /* mpeg1 picture header */

  377.     put_header(s, PICTURE_START_CODE);

  378.     /* temporal reference */

  379. 

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

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

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

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

  384. 

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

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

  387. 

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

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

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

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

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

  393.         else

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

  395.     }

  396. 

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

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

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

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

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

  402.         else

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

  404.     }

  405. 

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

  407. 

  408.     s->frame_pred_frame_dct = 1;

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

  410.         put_header(s, EXT_START_CODE);

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

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

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

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

  415.         }else{

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

  417.         }

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

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

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

  421.         }else{

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

  423.         }

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

  425. 

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

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

  428.         if (s->progressive_sequence) {

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

  430.         } else {

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

  432.         }

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

  434.            measures */

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

  436. 

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

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

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

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

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

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

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

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

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

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

  447.     }

  448.     if (s->scan_offset) {

  449.         int i;

  450. 

  451.         put_header(s, USER_START_CODE);

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

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

  454.         }

  455.     }

  456. 

  457.     s->mb_y=0;

  458.     ff_mpeg1_encode_slice_header(s);

  459. }

  460. 

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

  462.                                 int has_mv, int field_motion)

  463. {

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

  465.     if (!s->frame_pred_frame_dct) {

  466.         if (has_mv)

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

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

  469.     }

  470. }

  471. 

  472. static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,

  473.                                                    int16_t block[6][64],

  474.                                                    int motion_x, int motion_y,

  475.                                                    int mb_block_count)

  476. {

  477.     int i, cbp;

  478.     const int mb_x = s->mb_x;

  479.     const int mb_y = s->mb_y;

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

  481. 

  482.     /* compute cbp */

  483.     cbp = 0;

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

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

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

  487.     }

  488. 

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

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

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

  492.         (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) |

  493.         ((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))) {

  494.         s->mb_skip_run++;

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

  496.         s->skip_count++;

  497.         s->misc_bits++;

  498.         s->last_bits++;

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

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

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

  502.         }

  503.     } else {

  504.         if(first_mb){

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

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

  507.         }else{

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

  509.         }

  510. 

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

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

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

  514.                 put_qscale(s);

  515.             }else{

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

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

  518.             }

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

  520.             s->i_count++;

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

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

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

  524.                 put_qscale(s);

  525.             }else{

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

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

  528.             }

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

  530.             s->i_count++;

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

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

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

  534.                 if (cbp != 0) {

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

  536.                         if(s->dquant){

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

  538.                             put_qscale(s);

  539.                         }else{

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

  541.                         }

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

  543.                     } else {

  544.                         if(s->dquant){

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

  546.                             put_qscale(s);

  547.                         }else{

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

  549.                         }

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

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

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

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

  554.                     }

  555.                 } else {

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

  557.                     if (!s->frame_pred_frame_dct)

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

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

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

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

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

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

  564.                 }

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

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

  567.             }else{

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

  569. 

  570.                 if (cbp) {

  571.                     if(s->dquant){

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

  573.                         put_qscale(s);

  574.                     }else{

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

  576.                     }

  577.                 } else {

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

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

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

  581.                 }

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

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

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

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

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

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

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

  589.                 }

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

  591.             }

  592.             if(cbp) {

  593.                 if (s->chroma_y_shift) {

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

  595.                 } else {

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

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

  598.                 }

  599.             }

  600.             s->f_count++;

  601.         } else{

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

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

  604.                     if (s->dquant) {

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

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

  607.                         else

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

  609.                         put_qscale(s);

  610.                     } else {

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

  612.                     }

  613.                 }else{    // No coded bloc pattern

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

  615.                     if (!s->frame_pred_frame_dct)

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

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

  618.                 }

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

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

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

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

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

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

  625.                     s->f_count++;

  626.                 }

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

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

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

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

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

  632.                     s->b_count++;

  633.                 }

  634.             }else{

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

  636.                 av_assert2(!s->frame_pred_frame_dct);

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

  638.                     if (s->dquant) {

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

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

  641.                         else

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

  643.                         put_qscale(s);

  644.                     } else {

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

  646.                     }

  647.                 }else{    // No coded bloc pattern

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

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

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

  651.                 }

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

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

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

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

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

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

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

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

  660.                     }

  661.                     s->f_count++;

  662.                 }

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

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

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

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

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

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

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

  670.                     }

  671.                     s->b_count++;

  672.                 }

  673.             }

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

  675.             if(cbp) {

  676.                 if (s->chroma_y_shift) {

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

  678.                 } else {

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

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

  681.                 }

  682.             }

  683.         }

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

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

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

  687.             }

  688.         }

  689.         s->mb_skip_run = 0;

  690.         if(s->mb_intra)

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

  692.         else

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

  694.     }

  695. }

  696. 

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

  698. {

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

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

  701. }

  702. 

  703. // RAL: Parameter added: f_or_b_code

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

  705. {

  706.     if (val == 0) {

  707.         /* zero vector */

  708.         put_bits(&s->pb,

  709.                  ff_mpeg12_mbMotionVectorTable[0][1],

  710.                  ff_mpeg12_mbMotionVectorTable[0][0]);

  711.     } else {

  712.         int code, sign, bits;

  713.         int bit_size = f_or_b_code - 1;

  714.         int range = 1 << bit_size;

  715.         /* modulo encoding */

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

  717. 

  718.         if (val >= 0) {

  719.             val--;

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

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

  722.             sign = 0;

  723.         } else {

  724.             val = -val;

  725.             val--;

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

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

  728.             sign = 1;

  729.         }

  730. 

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

  732. 

  733.         put_bits(&s->pb,

  734.                  ff_mpeg12_mbMotionVectorTable[code][1],

  735.                  ff_mpeg12_mbMotionVectorTable[code][0]);

  736. 

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

  738.         if (bit_size > 0) {

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

  740.         }

  741.     }

  742. }

  743. 

  744. void ff_mpeg1_encode_init(MpegEncContext *s)

  745. {

  746.     static int done=0;

  747. 

  748.     ff_mpeg12_common_init(s);

  749. 

  750.     if(!done){

  751.         int f_code;

  752.         int mv;

  753.         int i;

  754. 

  755.         done=1;

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

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

  758. 

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

  760.         {

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

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

  763.         }

  764. 

  765.         init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);

  766.         if(s->intra_vlc_format)

  767.             init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);

  768. 

  769.         /* build unified dc encoding tables */

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

  771.         {

  772.                 int adiff, index;

  773.                 int bits, code;

  774.                 int diff=i;

  775. 

  776.                 adiff = FFABS(diff);

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

  778.                 index = av_log2(2*adiff);

  779. 

  780.                 bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;

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

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

  783. 

  784.                 bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;

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

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

  787.         }

  788. 

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

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

  791.                 int len;

  792. 

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

  794.                 else{

  795.                     int val, bit_size, code;

  796. 

  797.                     bit_size = f_code - 1;

  798. 

  799.                     val=mv;

  800.                     if (val < 0)

  801.                         val = -val;

  802.                     val--;

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

  804.                     if(code<17){

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

  806.                     }else{

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

  808.                     }

  809.                 }

  810. 

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

  812.             }

  813.         }

  814. 

  815. 

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

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

  818.                 fcode_tab[mv+MAX_MV]= f_code;

  819.             }

  820.         }

  821.     }

  822.     s->me.mv_penalty= mv_penalty;

  823.     s->fcode_tab= fcode_tab;

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

  825.         s->min_qcoeff=-255;

  826.         s->max_qcoeff= 255;

  827.     }else{

  828.         s->min_qcoeff=-2047;

  829.         s->max_qcoeff= 2047;

  830.     }

  831.     if (s->intra_vlc_format) {

  832.         s->intra_ac_vlc_length=

  833.         s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;

  834.     } else {

  835.         s->intra_ac_vlc_length=

  836.         s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;

  837.     }

  838.     s->inter_ac_vlc_length=

  839.     s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;

  840. }

  841. 

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

  843. {

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

  845.         int index;

  846. 

  847.         if(diff<0){

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

  849.             diff--;

  850.         }else{

  851.             index= av_log2_16bit(2*diff);

  852.         }

  853.         if (component == 0) {

  854.             put_bits(

  855.                 &s->pb,

  856.                 ff_mpeg12_vlc_dc_lum_bits[index] + index,

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

  858.         }else{

  859.             put_bits(

  860.                 &s->pb,

  861.                 ff_mpeg12_vlc_dc_chroma_bits[index] + index,

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

  863.         }

  864.   }else{

  865.     if (component == 0) {

  866.         put_bits(

  867.             &s->pb,

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

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

  870.     } else {

  871.         put_bits(

  872.             &s->pb,

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

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

  875.     }

  876.   }

  877. }

  878. 

  879. static void mpeg1_encode_block(MpegEncContext *s,

  880.                                int16_t *block,

  881.                                int n)

  882. {

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

  884.     int code, component;

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

  886. 

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

  888. 

  889.     /* DC coef */

  890.     if (s->mb_intra) {

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

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

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

  894.         encode_dc(s, diff, component);

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

  896.         i = 1;

  897.         if (s->intra_vlc_format)

  898.             table_vlc = ff_rl_mpeg2.table_vlc;

  899.     } else {

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

  901.            it is handled slightly differently */

  902.         level = block[0];

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

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

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

  906.                 i = 1;

  907.         } else {

  908.             i = 0;

  909.             last_non_zero = -1;

  910.             goto next_coef;

  911.         }

  912.     }

  913. 

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

  915.     last_non_zero = i - 1;

  916. 

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

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

  919.         level = block[j];

  920.     next_coef:

  921.         /* encode using VLC */

  922.         if (level != 0) {

  923.             run = i - last_non_zero - 1;

  924. 

  925.             alevel= level;

  926.             MASK_ABS(sign, alevel);

  927.             sign&=1;

  928. 

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

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

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

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

  933.             } else {

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

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

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

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

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

  939.                     if (alevel < 128) {

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

  941.                     } else {

  942.                         if (level < 0) {

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

  944.                         } else {

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

  946.                         }

  947.                     }

  948.                 }else{

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

  950.                 }

  951.             }

  952.             last_non_zero = i;

  953.         }

  954.     }

  955.     /* end of block */

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

  957. }

  958. 

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

  960. #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM

  961. #define COMMON_OPTS\

  962.     { "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 },\

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

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

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

  966. 

  967. static const AVOption mpeg1_options[] = {

  968.     COMMON_OPTS

  969.     FF_MPV_COMMON_OPTS

  970.     { NULL },

  971. };

  972. 

  973. static const AVOption mpeg2_options[] = {

  974.     COMMON_OPTS

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

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

  977.     FF_MPV_COMMON_OPTS

  978.     { NULL },

  979. };

  980. 

  981. #define mpeg12_class(x)\

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

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

  984.     .item_name    = av_default_item_name,\

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

  986.     .version      = LIBAVUTIL_VERSION_INT,\

  987. };

  988. 

  989. mpeg12_class(1)

  990. mpeg12_class(2)

  991. 

  992. AVCodec ff_mpeg1video_encoder = {

  993.     .name                 = "mpeg1video",

  994.     .type                 = AVMEDIA_TYPE_VIDEO,

  995.     .id                   = AV_CODEC_ID_MPEG1VIDEO,

  996.     .priv_data_size       = sizeof(MpegEncContext),

  997.     .init                 = encode_init,

  998.     .encode2              = ff_MPV_encode_picture,

  999.     .close                = ff_MPV_encode_end,

  1000.     .supported_framerates = ff_mpeg12_frame_rate_tab + 1,

  1001.     .pix_fmts             = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,

  1002.                                                         AV_PIX_FMT_NONE },

  1003.     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,

  1004.     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-1 video"),

  1005.     .priv_class           = &mpeg1_class,

  1006. };

  1007. 

  1008. AVCodec ff_mpeg2video_encoder = {

  1009.     .name                 = "mpeg2video",

  1010.     .type                 = AVMEDIA_TYPE_VIDEO,

  1011.     .id                   = AV_CODEC_ID_MPEG2VIDEO,

  1012.     .priv_data_size       = sizeof(MpegEncContext),

  1013.     .init                 = encode_init,

  1014.     .encode2              = ff_MPV_encode_picture,

  1015.     .close                = ff_MPV_encode_end,

  1016.     .supported_framerates = ff_mpeg2_frame_rate_tab,

  1017.     .pix_fmts             = (const enum AVPixelFormat[]){

  1018.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE

  1019.     },

  1020.     .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,

  1021.     .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),

  1022.     .priv_class           = &mpeg2_class,

  1023. };