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FFmpeg/libavcodec/mpegvideo_common.h

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  1. /*

  2.  * The simplest mpeg encoder (well, it was the simplest!)

  3.  * Copyright (c) 2000,2001 Fabrice Bellard.

  4.  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>

  5.  *

  6.  * 4MV & hq & B-frame encoding stuff by Michael Niedermayer <michaelni@gmx.at>

  7.  *

  8.  * This file is part of FFmpeg.

  9.  *

  10.  * FFmpeg is free software; you can redistribute it and/or

  11.  * modify it under the terms of the GNU Lesser General Public

  12.  * License as published by the Free Software Foundation; either

  13.  * version 2.1 of the License, or (at your option) any later version.

  14.  *

  15.  * FFmpeg is distributed in the hope that it will be useful,

  16.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  17.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  18.  * Lesser General Public License for more details.

  19.  *

  20.  * You should have received a copy of the GNU Lesser General Public

  21.  * License along with FFmpeg; if not, write to the Free Software

  22.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  23.  */

  24. 

  25. /**

  26.  * @file mpegvideo_common.h

  27.  * The simplest mpeg encoder (well, it was the simplest!).

  28.  */

  29. 

  30. #ifndef FFMPEG_MPEGVIDEO_COMMON_H

  31. #define FFMPEG_MPEGVIDEO_COMMON_H

  32. 

  33. #include "avcodec.h"

  34. #include "dsputil.h"

  35. #include "mpegvideo.h"

  36. #include "mjpegenc.h"

  37. #include "msmpeg4.h"

  38. #include "faandct.h"

  39. #include <limits.h>

  40. 

  41. int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);

  42. int dct_quantize_trellis_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);

  43. void  denoise_dct_c(MpegEncContext *s, DCTELEM *block);

  44. void copy_picture(Picture *dst, Picture *src);

  45. 

  46. /**

  47.  * allocates a Picture

  48.  * The pixels are allocated/set by calling get_buffer() if shared=0

  49.  */

  50. int alloc_picture(MpegEncContext *s, Picture *pic, int shared);

  51. 

  52. /**

  53.  * sets the given MpegEncContext to common defaults (same for encoding and decoding).

  54.  * the changed fields will not depend upon the prior state of the MpegEncContext.

  55.  */

  56. void MPV_common_defaults(MpegEncContext *s);

  57. 

  58. static inline void gmc1_motion(MpegEncContext *s,

  59.                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  60.                                uint8_t **ref_picture)

  61. {

  62.     uint8_t *ptr;

  63.     int offset, src_x, src_y, linesize, uvlinesize;

  64.     int motion_x, motion_y;

  65.     int emu=0;

  66. 

  67.     motion_x= s->sprite_offset[0][0];

  68.     motion_y= s->sprite_offset[0][1];

  69.     src_x = s->mb_x * 16 + (motion_x >> (s->sprite_warping_accuracy+1));

  70.     src_y = s->mb_y * 16 + (motion_y >> (s->sprite_warping_accuracy+1));

  71.     motion_x<<=(3-s->sprite_warping_accuracy);

  72.     motion_y<<=(3-s->sprite_warping_accuracy);

  73.     src_x = av_clip(src_x, -16, s->width);

  74.     if (src_x == s->width)

  75.         motion_x =0;

  76.     src_y = av_clip(src_y, -16, s->height);

  77.     if (src_y == s->height)

  78.         motion_y =0;

  79. 

  80.     linesize = s->linesize;

  81.     uvlinesize = s->uvlinesize;

  82. 

  83.     ptr = ref_picture[0] + (src_y * linesize) + src_x;

  84. 

  85.     if(s->flags&CODEC_FLAG_EMU_EDGE){

  86.         if(   (unsigned)src_x >= s->h_edge_pos - 17

  87.            || (unsigned)src_y >= s->v_edge_pos - 17){

  88.             ff_emulated_edge_mc(s->edge_emu_buffer, ptr, linesize, 17, 17, src_x, src_y, s->h_edge_pos, s->v_edge_pos);

  89.             ptr= s->edge_emu_buffer;

  90.         }

  91.     }

  92. 

  93.     if((motion_x|motion_y)&7){

  94.         s->dsp.gmc1(dest_y  , ptr  , linesize, 16, motion_x&15, motion_y&15, 128 - s->no_rounding);

  95.         s->dsp.gmc1(dest_y+8, ptr+8, linesize, 16, motion_x&15, motion_y&15, 128 - s->no_rounding);

  96.     }else{

  97.         int dxy;

  98. 

  99.         dxy= ((motion_x>>3)&1) | ((motion_y>>2)&2);

  100.         if (s->no_rounding){

  101.             s->dsp.put_no_rnd_pixels_tab[0][dxy](dest_y, ptr, linesize, 16);

  102.         }else{

  103.             s->dsp.put_pixels_tab       [0][dxy](dest_y, ptr, linesize, 16);

  104.         }

  105.     }

  106. 

  107.     if(ENABLE_GRAY && s->flags&CODEC_FLAG_GRAY) return;

  108. 

  109.     motion_x= s->sprite_offset[1][0];

  110.     motion_y= s->sprite_offset[1][1];

  111.     src_x = s->mb_x * 8 + (motion_x >> (s->sprite_warping_accuracy+1));

  112.     src_y = s->mb_y * 8 + (motion_y >> (s->sprite_warping_accuracy+1));

  113.     motion_x<<=(3-s->sprite_warping_accuracy);

  114.     motion_y<<=(3-s->sprite_warping_accuracy);

  115.     src_x = av_clip(src_x, -8, s->width>>1);

  116.     if (src_x == s->width>>1)

  117.         motion_x =0;

  118.     src_y = av_clip(src_y, -8, s->height>>1);

  119.     if (src_y == s->height>>1)

  120.         motion_y =0;

  121. 

  122.     offset = (src_y * uvlinesize) + src_x;

  123.     ptr = ref_picture[1] + offset;

  124.     if(s->flags&CODEC_FLAG_EMU_EDGE){

  125.         if(   (unsigned)src_x >= (s->h_edge_pos>>1) - 9

  126.            || (unsigned)src_y >= (s->v_edge_pos>>1) - 9){

  127.             ff_emulated_edge_mc(s->edge_emu_buffer, ptr, uvlinesize, 9, 9, src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);

  128.             ptr= s->edge_emu_buffer;

  129.             emu=1;

  130.         }

  131.     }

  132.     s->dsp.gmc1(dest_cb, ptr, uvlinesize, 8, motion_x&15, motion_y&15, 128 - s->no_rounding);

  133. 

  134.     ptr = ref_picture[2] + offset;

  135.     if(emu){

  136.         ff_emulated_edge_mc(s->edge_emu_buffer, ptr, uvlinesize, 9, 9, src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);

  137.         ptr= s->edge_emu_buffer;

  138.     }

  139.     s->dsp.gmc1(dest_cr, ptr, uvlinesize, 8, motion_x&15, motion_y&15, 128 - s->no_rounding);

  140. 

  141.     return;

  142. }

  143. 

  144. static inline void gmc_motion(MpegEncContext *s,

  145.                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  146.                                uint8_t **ref_picture)

  147. {

  148.     uint8_t *ptr;

  149.     int linesize, uvlinesize;

  150.     const int a= s->sprite_warping_accuracy;

  151.     int ox, oy;

  152. 

  153.     linesize = s->linesize;

  154.     uvlinesize = s->uvlinesize;

  155. 

  156.     ptr = ref_picture[0];

  157. 

  158.     ox= s->sprite_offset[0][0] + s->sprite_delta[0][0]*s->mb_x*16 + s->sprite_delta[0][1]*s->mb_y*16;

  159.     oy= s->sprite_offset[0][1] + s->sprite_delta[1][0]*s->mb_x*16 + s->sprite_delta[1][1]*s->mb_y*16;

  160. 

  161.     s->dsp.gmc(dest_y, ptr, linesize, 16,

  162.            ox,

  163.            oy,

  164.            s->sprite_delta[0][0], s->sprite_delta[0][1],

  165.            s->sprite_delta[1][0], s->sprite_delta[1][1],

  166.            a+1, (1<<(2*a+1)) - s->no_rounding,

  167.            s->h_edge_pos, s->v_edge_pos);

  168.     s->dsp.gmc(dest_y+8, ptr, linesize, 16,

  169.            ox + s->sprite_delta[0][0]*8,

  170.            oy + s->sprite_delta[1][0]*8,

  171.            s->sprite_delta[0][0], s->sprite_delta[0][1],

  172.            s->sprite_delta[1][0], s->sprite_delta[1][1],

  173.            a+1, (1<<(2*a+1)) - s->no_rounding,

  174.            s->h_edge_pos, s->v_edge_pos);

  175. 

  176.     if(ENABLE_GRAY && s->flags&CODEC_FLAG_GRAY) return;

  177. 

  178.     ox= s->sprite_offset[1][0] + s->sprite_delta[0][0]*s->mb_x*8 + s->sprite_delta[0][1]*s->mb_y*8;

  179.     oy= s->sprite_offset[1][1] + s->sprite_delta[1][0]*s->mb_x*8 + s->sprite_delta[1][1]*s->mb_y*8;

  180. 

  181.     ptr = ref_picture[1];

  182.     s->dsp.gmc(dest_cb, ptr, uvlinesize, 8,

  183.            ox,

  184.            oy,

  185.            s->sprite_delta[0][0], s->sprite_delta[0][1],

  186.            s->sprite_delta[1][0], s->sprite_delta[1][1],

  187.            a+1, (1<<(2*a+1)) - s->no_rounding,

  188.            s->h_edge_pos>>1, s->v_edge_pos>>1);

  189. 

  190.     ptr = ref_picture[2];

  191.     s->dsp.gmc(dest_cr, ptr, uvlinesize, 8,

  192.            ox,

  193.            oy,

  194.            s->sprite_delta[0][0], s->sprite_delta[0][1],

  195.            s->sprite_delta[1][0], s->sprite_delta[1][1],

  196.            a+1, (1<<(2*a+1)) - s->no_rounding,

  197.            s->h_edge_pos>>1, s->v_edge_pos>>1);

  198. }

  199. 

  200. static inline int hpel_motion(MpegEncContext *s,

  201.                                   uint8_t *dest, uint8_t *src,

  202.                                   int field_based, int field_select,

  203.                                   int src_x, int src_y,

  204.                                   int width, int height, int stride,

  205.                                   int h_edge_pos, int v_edge_pos,

  206.                                   int w, int h, op_pixels_func *pix_op,

  207.                                   int motion_x, int motion_y)

  208. {

  209.     int dxy;

  210.     int emu=0;

  211. 

  212.     dxy = ((motion_y & 1) << 1) | (motion_x & 1);

  213.     src_x += motion_x >> 1;

  214.     src_y += motion_y >> 1;

  215. 

  216.     /* WARNING: do no forget half pels */

  217.     src_x = av_clip(src_x, -16, width); //FIXME unneeded for emu?

  218.     if (src_x == width)

  219.         dxy &= ~1;

  220.     src_y = av_clip(src_y, -16, height);

  221.     if (src_y == height)

  222.         dxy &= ~2;

  223.     src += src_y * stride + src_x;

  224. 

  225.     if(s->unrestricted_mv && (s->flags&CODEC_FLAG_EMU_EDGE)){

  226.         if(   (unsigned)src_x > h_edge_pos - (motion_x&1) - w

  227.            || (unsigned)src_y > v_edge_pos - (motion_y&1) - h){

  228.             ff_emulated_edge_mc(s->edge_emu_buffer, src, s->linesize, w+1, (h+1)<<field_based,

  229.                              src_x, src_y<<field_based, h_edge_pos, s->v_edge_pos);

  230.             src= s->edge_emu_buffer;

  231.             emu=1;

  232.         }

  233.     }

  234.     if(field_select)

  235.         src += s->linesize;

  236.     pix_op[dxy](dest, src, stride, h);

  237.     return emu;

  238. }

  239. 

  240. /* apply one mpeg motion vector to the three components */

  241. static av_always_inline

  242. void mpeg_motion(MpegEncContext *s,

  243.                  uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  244.                  int field_based, int bottom_field, int field_select,

  245.                  uint8_t **ref_picture, op_pixels_func (*pix_op)[4],

  246.                  int motion_x, int motion_y, int h)

  247. {

  248.     uint8_t *ptr_y, *ptr_cb, *ptr_cr;

  249.     int dxy, uvdxy, mx, my, src_x, src_y,

  250.         uvsrc_x, uvsrc_y, v_edge_pos, uvlinesize, linesize;

  251. 

  252. #if 0

  253. if(s->quarter_sample)

  254. {

  255.     motion_x>>=1;

  256.     motion_y>>=1;

  257. }

  258. #endif

  259. 

  260.     v_edge_pos = s->v_edge_pos >> field_based;

  261.     linesize   = s->current_picture.linesize[0] << field_based;

  262.     uvlinesize = s->current_picture.linesize[1] << field_based;

  263. 

  264.     dxy = ((motion_y & 1) << 1) | (motion_x & 1);

  265.     src_x = s->mb_x* 16               + (motion_x >> 1);

  266.     src_y =(s->mb_y<<(4-field_based)) + (motion_y >> 1);

  267. 

  268.     if (s->out_format == FMT_H263) {

  269.         if((s->workaround_bugs & FF_BUG_HPEL_CHROMA) && field_based){

  270.             mx = (motion_x>>1)|(motion_x&1);

  271.             my = motion_y >>1;

  272.             uvdxy = ((my & 1) << 1) | (mx & 1);

  273.             uvsrc_x = s->mb_x* 8               + (mx >> 1);

  274.             uvsrc_y = (s->mb_y<<(3-field_based)) + (my >> 1);

  275.         }else{

  276.             uvdxy = dxy | (motion_y & 2) | ((motion_x & 2) >> 1);

  277.             uvsrc_x = src_x>>1;

  278.             uvsrc_y = src_y>>1;

  279.         }

  280.     }else if(s->out_format == FMT_H261){//even chroma mv's are full pel in H261

  281.         mx = motion_x / 4;

  282.         my = motion_y / 4;

  283.         uvdxy = 0;

  284.         uvsrc_x = s->mb_x*8 + mx;

  285.         uvsrc_y = s->mb_y*8 + my;

  286.     } else {

  287.         if(s->chroma_y_shift){

  288.             mx = motion_x / 2;

  289.             my = motion_y / 2;

  290.             uvdxy = ((my & 1) << 1) | (mx & 1);

  291.             uvsrc_x = s->mb_x* 8               + (mx >> 1);

  292.             uvsrc_y = (s->mb_y<<(3-field_based)) + (my >> 1);

  293.         } else {

  294.             if(s->chroma_x_shift){

  295.             //Chroma422

  296.                 mx = motion_x / 2;

  297.                 uvdxy = ((motion_y & 1) << 1) | (mx & 1);

  298.                 uvsrc_x = s->mb_x* 8           + (mx >> 1);

  299.                 uvsrc_y = src_y;

  300.             } else {

  301.             //Chroma444

  302.                 uvdxy = dxy;

  303.                 uvsrc_x = src_x;

  304.                 uvsrc_y = src_y;

  305.             }

  306.         }

  307.     }

  308. 

  309.     ptr_y  = ref_picture[0] + src_y * linesize + src_x;

  310.     ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;

  311.     ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;

  312. 

  313.     if(   (unsigned)src_x > s->h_edge_pos - (motion_x&1) - 16

  314.        || (unsigned)src_y >    v_edge_pos - (motion_y&1) - h){

  315.             if(s->codec_id == CODEC_ID_MPEG2VIDEO ||

  316.                s->codec_id == CODEC_ID_MPEG1VIDEO){

  317.                 av_log(s->avctx,AV_LOG_DEBUG,

  318.                         "MPEG motion vector out of boundary\n");

  319.                 return ;

  320.             }

  321.             ff_emulated_edge_mc(s->edge_emu_buffer, ptr_y, s->linesize,

  322.                                 17, 17+field_based,

  323.                                 src_x, src_y<<field_based,

  324.                                 s->h_edge_pos, s->v_edge_pos);

  325.             ptr_y = s->edge_emu_buffer;

  326.             if(!ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){

  327.                 uint8_t *uvbuf= s->edge_emu_buffer+18*s->linesize;

  328.                 ff_emulated_edge_mc(uvbuf ,

  329.                                     ptr_cb, s->uvlinesize,

  330.                                     9, 9+field_based,

  331.                                     uvsrc_x, uvsrc_y<<field_based,

  332.                                     s->h_edge_pos>>1, s->v_edge_pos>>1);

  333.                 ff_emulated_edge_mc(uvbuf+16,

  334.                                     ptr_cr, s->uvlinesize,

  335.                                     9, 9+field_based,

  336.                                     uvsrc_x, uvsrc_y<<field_based,

  337.                                     s->h_edge_pos>>1, s->v_edge_pos>>1);

  338.                 ptr_cb= uvbuf;

  339.                 ptr_cr= uvbuf+16;

  340.             }

  341.     }

  342. 

  343.     if(bottom_field){ //FIXME use this for field pix too instead of the obnoxious hack which changes picture.data

  344.         dest_y += s->linesize;

  345.         dest_cb+= s->uvlinesize;

  346.         dest_cr+= s->uvlinesize;

  347.     }

  348. 

  349.     if(field_select){

  350.         ptr_y += s->linesize;

  351.         ptr_cb+= s->uvlinesize;

  352.         ptr_cr+= s->uvlinesize;

  353.     }

  354. 

  355.     pix_op[0][dxy](dest_y, ptr_y, linesize, h);

  356. 

  357.     if(!ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){

  358.         pix_op[s->chroma_x_shift][uvdxy]

  359.                 (dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift);

  360.         pix_op[s->chroma_x_shift][uvdxy]

  361.                 (dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift);

  362.     }

  363.     if((ENABLE_H261_ENCODER || ENABLE_H261_DECODER) &&

  364.          s->out_format == FMT_H261){

  365.         ff_h261_loop_filter(s);

  366.     }

  367. }

  368. 

  369. //FIXME move to dsputil, avg variant, 16x16 version

  370. static inline void put_obmc(uint8_t *dst, uint8_t *src[5], int stride){

  371.     int x;

  372.     uint8_t * const top   = src[1];

  373.     uint8_t * const left  = src[2];

  374.     uint8_t * const mid   = src[0];

  375.     uint8_t * const right = src[3];

  376.     uint8_t * const bottom= src[4];

  377. #define OBMC_FILTER(x, t, l, m, r, b)\

  378.     dst[x]= (t*top[x] + l*left[x] + m*mid[x] + r*right[x] + b*bottom[x] + 4)>>3

  379. #define OBMC_FILTER4(x, t, l, m, r, b)\

  380.     OBMC_FILTER(x         , t, l, m, r, b);\

  381.     OBMC_FILTER(x+1       , t, l, m, r, b);\

  382.     OBMC_FILTER(x  +stride, t, l, m, r, b);\

  383.     OBMC_FILTER(x+1+stride, t, l, m, r, b);

  384. 

  385.     x=0;

  386.     OBMC_FILTER (x  , 2, 2, 4, 0, 0);

  387.     OBMC_FILTER (x+1, 2, 1, 5, 0, 0);

  388.     OBMC_FILTER4(x+2, 2, 1, 5, 0, 0);

  389.     OBMC_FILTER4(x+4, 2, 0, 5, 1, 0);

  390.     OBMC_FILTER (x+6, 2, 0, 5, 1, 0);

  391.     OBMC_FILTER (x+7, 2, 0, 4, 2, 0);

  392.     x+= stride;

  393.     OBMC_FILTER (x  , 1, 2, 5, 0, 0);

  394.     OBMC_FILTER (x+1, 1, 2, 5, 0, 0);

  395.     OBMC_FILTER (x+6, 1, 0, 5, 2, 0);

  396.     OBMC_FILTER (x+7, 1, 0, 5, 2, 0);

  397.     x+= stride;

  398.     OBMC_FILTER4(x  , 1, 2, 5, 0, 0);

  399.     OBMC_FILTER4(x+2, 1, 1, 6, 0, 0);

  400.     OBMC_FILTER4(x+4, 1, 0, 6, 1, 0);

  401.     OBMC_FILTER4(x+6, 1, 0, 5, 2, 0);

  402.     x+= 2*stride;

  403.     OBMC_FILTER4(x  , 0, 2, 5, 0, 1);

  404.     OBMC_FILTER4(x+2, 0, 1, 6, 0, 1);

  405.     OBMC_FILTER4(x+4, 0, 0, 6, 1, 1);

  406.     OBMC_FILTER4(x+6, 0, 0, 5, 2, 1);

  407.     x+= 2*stride;

  408.     OBMC_FILTER (x  , 0, 2, 5, 0, 1);

  409.     OBMC_FILTER (x+1, 0, 2, 5, 0, 1);

  410.     OBMC_FILTER4(x+2, 0, 1, 5, 0, 2);

  411.     OBMC_FILTER4(x+4, 0, 0, 5, 1, 2);

  412.     OBMC_FILTER (x+6, 0, 0, 5, 2, 1);

  413.     OBMC_FILTER (x+7, 0, 0, 5, 2, 1);

  414.     x+= stride;

  415.     OBMC_FILTER (x  , 0, 2, 4, 0, 2);

  416.     OBMC_FILTER (x+1, 0, 1, 5, 0, 2);

  417.     OBMC_FILTER (x+6, 0, 0, 5, 1, 2);

  418.     OBMC_FILTER (x+7, 0, 0, 4, 2, 2);

  419. }

  420. 

  421. /* obmc for 1 8x8 luma block */

  422. static inline void obmc_motion(MpegEncContext *s,

  423.                                uint8_t *dest, uint8_t *src,

  424.                                int src_x, int src_y,

  425.                                op_pixels_func *pix_op,

  426.                                int16_t mv[5][2]/* mid top left right bottom*/)

  427. #define MID    0

  428. {

  429.     int i;

  430.     uint8_t *ptr[5];

  431. 

  432.     assert(s->quarter_sample==0);

  433. 

  434.     for(i=0; i<5; i++){

  435.         if(i && mv[i][0]==mv[MID][0] && mv[i][1]==mv[MID][1]){

  436.             ptr[i]= ptr[MID];

  437.         }else{

  438.             ptr[i]= s->obmc_scratchpad + 8*(i&1) + s->linesize*8*(i>>1);

  439.             hpel_motion(s, ptr[i], src, 0, 0,

  440.                         src_x, src_y,

  441.                         s->width, s->height, s->linesize,

  442.                         s->h_edge_pos, s->v_edge_pos,

  443.                         8, 8, pix_op,

  444.                         mv[i][0], mv[i][1]);

  445.         }

  446.     }

  447. 

  448.     put_obmc(dest, ptr, s->linesize);

  449. }

  450. 

  451. static inline void qpel_motion(MpegEncContext *s,

  452.                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  453.                                int field_based, int bottom_field, int field_select,

  454.                                uint8_t **ref_picture, op_pixels_func (*pix_op)[4],

  455.                                qpel_mc_func (*qpix_op)[16],

  456.                                int motion_x, int motion_y, int h)

  457. {

  458.     uint8_t *ptr_y, *ptr_cb, *ptr_cr;

  459.     int dxy, uvdxy, mx, my, src_x, src_y, uvsrc_x, uvsrc_y, v_edge_pos, linesize, uvlinesize;

  460. 

  461.     dxy = ((motion_y & 3) << 2) | (motion_x & 3);

  462.     src_x = s->mb_x *  16                 + (motion_x >> 2);

  463.     src_y = s->mb_y * (16 >> field_based) + (motion_y >> 2);

  464. 

  465.     v_edge_pos = s->v_edge_pos >> field_based;

  466.     linesize = s->linesize << field_based;

  467.     uvlinesize = s->uvlinesize << field_based;

  468. 

  469.     if(field_based){

  470.         mx= motion_x/2;

  471.         my= motion_y>>1;

  472.     }else if(s->workaround_bugs&FF_BUG_QPEL_CHROMA2){

  473.         static const int rtab[8]= {0,0,1,1,0,0,0,1};

  474.         mx= (motion_x>>1) + rtab[motion_x&7];

  475.         my= (motion_y>>1) + rtab[motion_y&7];

  476.     }else if(s->workaround_bugs&FF_BUG_QPEL_CHROMA){

  477.         mx= (motion_x>>1)|(motion_x&1);

  478.         my= (motion_y>>1)|(motion_y&1);

  479.     }else{

  480.         mx= motion_x/2;

  481.         my= motion_y/2;

  482.     }

  483.     mx= (mx>>1)|(mx&1);

  484.     my= (my>>1)|(my&1);

  485. 

  486.     uvdxy= (mx&1) | ((my&1)<<1);

  487.     mx>>=1;

  488.     my>>=1;

  489. 

  490.     uvsrc_x = s->mb_x *  8                 + mx;

  491.     uvsrc_y = s->mb_y * (8 >> field_based) + my;

  492. 

  493.     ptr_y  = ref_picture[0] +   src_y *   linesize +   src_x;

  494.     ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;

  495.     ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;

  496. 

  497.     if(   (unsigned)src_x > s->h_edge_pos - (motion_x&3) - 16

  498.        || (unsigned)src_y >    v_edge_pos - (motion_y&3) - h  ){

  499.         ff_emulated_edge_mc(s->edge_emu_buffer, ptr_y, s->linesize,

  500.                             17, 17+field_based, src_x, src_y<<field_based,

  501.                             s->h_edge_pos, s->v_edge_pos);

  502.         ptr_y= s->edge_emu_buffer;

  503.         if(!ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){

  504.             uint8_t *uvbuf= s->edge_emu_buffer + 18*s->linesize;

  505.             ff_emulated_edge_mc(uvbuf, ptr_cb, s->uvlinesize,

  506.                                 9, 9 + field_based,

  507.                                 uvsrc_x, uvsrc_y<<field_based,

  508.                                 s->h_edge_pos>>1, s->v_edge_pos>>1);

  509.             ff_emulated_edge_mc(uvbuf + 16, ptr_cr, s->uvlinesize,

  510.                                 9, 9 + field_based,

  511.                                 uvsrc_x, uvsrc_y<<field_based,

  512.                                 s->h_edge_pos>>1, s->v_edge_pos>>1);

  513.             ptr_cb= uvbuf;

  514.             ptr_cr= uvbuf + 16;

  515.         }

  516.     }

  517. 

  518.     if(!field_based)

  519.         qpix_op[0][dxy](dest_y, ptr_y, linesize);

  520.     else{

  521.         if(bottom_field){

  522.             dest_y += s->linesize;

  523.             dest_cb+= s->uvlinesize;

  524.             dest_cr+= s->uvlinesize;

  525.         }

  526. 

  527.         if(field_select){

  528.             ptr_y  += s->linesize;

  529.             ptr_cb += s->uvlinesize;

  530.             ptr_cr += s->uvlinesize;

  531.         }

  532.         //damn interlaced mode

  533.         //FIXME boundary mirroring is not exactly correct here

  534.         qpix_op[1][dxy](dest_y  , ptr_y  , linesize);

  535.         qpix_op[1][dxy](dest_y+8, ptr_y+8, linesize);

  536.     }

  537.     if(!ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){

  538.         pix_op[1][uvdxy](dest_cr, ptr_cr, uvlinesize, h >> 1);

  539.         pix_op[1][uvdxy](dest_cb, ptr_cb, uvlinesize, h >> 1);

  540.     }

  541. }

  542. 

  543. /**

  544.  * h263 chroma 4mv motion compensation.

  545.  */

  546. static inline void chroma_4mv_motion(MpegEncContext *s,

  547.                                      uint8_t *dest_cb, uint8_t *dest_cr,

  548.                                      uint8_t **ref_picture,

  549.                                      op_pixels_func *pix_op,

  550.                                      int mx, int my){

  551.     int dxy, emu=0, src_x, src_y, offset;

  552.     uint8_t *ptr;

  553. 

  554.     /* In case of 8X8, we construct a single chroma motion vector

  555.        with a special rounding */

  556.     mx= ff_h263_round_chroma(mx);

  557.     my= ff_h263_round_chroma(my);

  558. 

  559.     dxy = ((my & 1) << 1) | (mx & 1);

  560.     mx >>= 1;

  561.     my >>= 1;

  562. 

  563.     src_x = s->mb_x * 8 + mx;

  564.     src_y = s->mb_y * 8 + my;

  565.     src_x = av_clip(src_x, -8, s->width/2);

  566.     if (src_x == s->width/2)

  567.         dxy &= ~1;

  568.     src_y = av_clip(src_y, -8, s->height/2);

  569.     if (src_y == s->height/2)

  570.         dxy &= ~2;

  571. 

  572.     offset = (src_y * (s->uvlinesize)) + src_x;

  573.     ptr = ref_picture[1] + offset;

  574.     if(s->flags&CODEC_FLAG_EMU_EDGE){

  575.         if(   (unsigned)src_x > (s->h_edge_pos>>1) - (dxy &1) - 8

  576.            || (unsigned)src_y > (s->v_edge_pos>>1) - (dxy>>1) - 8){

  577.             ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize,

  578.                                 9, 9, src_x, src_y,

  579.                                 s->h_edge_pos>>1, s->v_edge_pos>>1);

  580.             ptr= s->edge_emu_buffer;

  581.             emu=1;

  582.         }

  583.     }

  584.     pix_op[dxy](dest_cb, ptr, s->uvlinesize, 8);

  585. 

  586.     ptr = ref_picture[2] + offset;

  587.     if(emu){

  588.         ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize,

  589.                             9, 9, src_x, src_y,

  590.                             s->h_edge_pos>>1, s->v_edge_pos>>1);

  591.         ptr= s->edge_emu_buffer;

  592.     }

  593.     pix_op[dxy](dest_cr, ptr, s->uvlinesize, 8);

  594. }

  595. 

  596. static inline void prefetch_motion(MpegEncContext *s, uint8_t **pix, int dir){

  597.     /* fetch pixels for estimated mv 4 macroblocks ahead

  598.      * optimized for 64byte cache lines */

  599.     const int shift = s->quarter_sample ? 2 : 1;

  600.     const int mx= (s->mv[dir][0][0]>>shift) + 16*s->mb_x + 8;

  601.     const int my= (s->mv[dir][0][1]>>shift) + 16*s->mb_y;

  602.     int off= mx + (my + (s->mb_x&3)*4)*s->linesize + 64;

  603.     s->dsp.prefetch(pix[0]+off, s->linesize, 4);

  604.     off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;

  605.     s->dsp.prefetch(pix[1]+off, pix[2]-pix[1], 2);

  606. }

  607. 

  608. /**

  609.  * motion compensation of a single macroblock

  610.  * @param s context

  611.  * @param dest_y luma destination pointer

  612.  * @param dest_cb chroma cb/u destination pointer

  613.  * @param dest_cr chroma cr/v destination pointer

  614.  * @param dir direction (0->forward, 1->backward)

  615.  * @param ref_picture array[3] of pointers to the 3 planes of the reference picture

  616.  * @param pic_op halfpel motion compensation function (average or put normally)

  617.  * @param pic_op qpel motion compensation function (average or put normally)

  618.  * the motion vectors are taken from s->mv and the MV type from s->mv_type

  619.  */

  620. static inline void MPV_motion(MpegEncContext *s,

  621.                               uint8_t *dest_y, uint8_t *dest_cb,

  622.                               uint8_t *dest_cr, int dir,

  623.                               uint8_t **ref_picture,

  624.                               op_pixels_func (*pix_op)[4],

  625.                               qpel_mc_func (*qpix_op)[16])

  626. {

  627.     int dxy, mx, my, src_x, src_y, motion_x, motion_y;

  628.     int mb_x, mb_y, i;

  629.     uint8_t *ptr, *dest;

  630. 

  631.     mb_x = s->mb_x;

  632.     mb_y = s->mb_y;

  633. 

  634.     prefetch_motion(s, ref_picture, dir);

  635. 

  636.     if(s->obmc && s->pict_type != FF_B_TYPE){

  637.         int16_t mv_cache[4][4][2];

  638.         const int xy= s->mb_x + s->mb_y*s->mb_stride;

  639.         const int mot_stride= s->b8_stride;

  640.         const int mot_xy= mb_x*2 + mb_y*2*mot_stride;

  641. 

  642.         assert(!s->mb_skipped);

  643. 

  644.         memcpy(mv_cache[1][1], s->current_picture.motion_val[0][mot_xy           ], sizeof(int16_t)*4);

  645.         memcpy(mv_cache[2][1], s->current_picture.motion_val[0][mot_xy+mot_stride], sizeof(int16_t)*4);

  646.         memcpy(mv_cache[3][1], s->current_picture.motion_val[0][mot_xy+mot_stride], sizeof(int16_t)*4);

  647. 

  648.         if(mb_y==0 || IS_INTRA(s->current_picture.mb_type[xy-s->mb_stride])){

  649.             memcpy(mv_cache[0][1], mv_cache[1][1], sizeof(int16_t)*4);

  650.         }else{

  651.             memcpy(mv_cache[0][1], s->current_picture.motion_val[0][mot_xy-mot_stride], sizeof(int16_t)*4);

  652.         }

  653. 

  654.         if(mb_x==0 || IS_INTRA(s->current_picture.mb_type[xy-1])){

  655.             *(int32_t*)mv_cache[1][0]= *(int32_t*)mv_cache[1][1];

  656.             *(int32_t*)mv_cache[2][0]= *(int32_t*)mv_cache[2][1];

  657.         }else{

  658.             *(int32_t*)mv_cache[1][0]= *(int32_t*)s->current_picture.motion_val[0][mot_xy-1];

  659.             *(int32_t*)mv_cache[2][0]= *(int32_t*)s->current_picture.motion_val[0][mot_xy-1+mot_stride];

  660.         }

  661. 

  662.         if(mb_x+1>=s->mb_width || IS_INTRA(s->current_picture.mb_type[xy+1])){

  663.             *(int32_t*)mv_cache[1][3]= *(int32_t*)mv_cache[1][2];

  664.             *(int32_t*)mv_cache[2][3]= *(int32_t*)mv_cache[2][2];

  665.         }else{

  666.             *(int32_t*)mv_cache[1][3]= *(int32_t*)s->current_picture.motion_val[0][mot_xy+2];

  667.             *(int32_t*)mv_cache[2][3]= *(int32_t*)s->current_picture.motion_val[0][mot_xy+2+mot_stride];

  668.         }

  669. 

  670.         mx = 0;

  671.         my = 0;

  672.         for(i=0;i<4;i++) {

  673.             const int x= (i&1)+1;

  674.             const int y= (i>>1)+1;

  675.             int16_t mv[5][2]= {

  676.                 {mv_cache[y][x  ][0], mv_cache[y][x  ][1]},

  677.                 {mv_cache[y-1][x][0], mv_cache[y-1][x][1]},

  678.                 {mv_cache[y][x-1][0], mv_cache[y][x-1][1]},

  679.                 {mv_cache[y][x+1][0], mv_cache[y][x+1][1]},

  680.                 {mv_cache[y+1][x][0], mv_cache[y+1][x][1]}};

  681.             //FIXME cleanup

  682.             obmc_motion(s, dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize,

  683.                         ref_picture[0],

  684.                         mb_x * 16 + (i & 1) * 8, mb_y * 16 + (i >>1) * 8,

  685.                         pix_op[1],

  686.                         mv);

  687. 

  688.             mx += mv[0][0];

  689.             my += mv[0][1];

  690.         }

  691.         if(!ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY))

  692.             chroma_4mv_motion(s, dest_cb, dest_cr, ref_picture, pix_op[1], mx, my);

  693. 

  694.         return;

  695.     }

  696. 

  697.     switch(s->mv_type) {

  698.     case MV_TYPE_16X16:

  699.         if(s->mcsel){

  700.             if(s->real_sprite_warping_points==1){

  701.                 gmc1_motion(s, dest_y, dest_cb, dest_cr,

  702.                             ref_picture);

  703.             }else{

  704.                 gmc_motion(s, dest_y, dest_cb, dest_cr,

  705.                             ref_picture);

  706.             }

  707.         }else if(s->quarter_sample){

  708.             qpel_motion(s, dest_y, dest_cb, dest_cr,

  709.                         0, 0, 0,

  710.                         ref_picture, pix_op, qpix_op,

  711.                         s->mv[dir][0][0], s->mv[dir][0][1], 16);

  712.         }else if(ENABLE_WMV2 && s->mspel){

  713.             ff_mspel_motion(s, dest_y, dest_cb, dest_cr,

  714.                         ref_picture, pix_op,

  715.                         s->mv[dir][0][0], s->mv[dir][0][1], 16);

  716.         }else

  717.         {

  718.             mpeg_motion(s, dest_y, dest_cb, dest_cr,

  719.                         0, 0, 0,

  720.                         ref_picture, pix_op,

  721.                         s->mv[dir][0][0], s->mv[dir][0][1], 16);

  722.         }

  723.         break;

  724.     case MV_TYPE_8X8:

  725.         mx = 0;

  726.         my = 0;

  727.         if(s->quarter_sample){

  728.             for(i=0;i<4;i++) {

  729.                 motion_x = s->mv[dir][i][0];

  730.                 motion_y = s->mv[dir][i][1];

  731. 

  732.                 dxy = ((motion_y & 3) << 2) | (motion_x & 3);

  733.                 src_x = mb_x * 16 + (motion_x >> 2) + (i & 1) * 8;

  734.                 src_y = mb_y * 16 + (motion_y >> 2) + (i >>1) * 8;

  735. 

  736.                 /* WARNING: do no forget half pels */

  737.                 src_x = av_clip(src_x, -16, s->width);

  738.                 if (src_x == s->width)

  739.                     dxy &= ~3;

  740.                 src_y = av_clip(src_y, -16, s->height);

  741.                 if (src_y == s->height)

  742.                     dxy &= ~12;

  743. 

  744.                 ptr = ref_picture[0] + (src_y * s->linesize) + (src_x);

  745.                 if(s->flags&CODEC_FLAG_EMU_EDGE){

  746.                     if(   (unsigned)src_x > s->h_edge_pos - (motion_x&3) - 8

  747.                        || (unsigned)src_y > s->v_edge_pos - (motion_y&3) - 8 ){

  748.                         ff_emulated_edge_mc(s->edge_emu_buffer, ptr,

  749.                                             s->linesize, 9, 9,

  750.                                             src_x, src_y,

  751.                                             s->h_edge_pos, s->v_edge_pos);

  752.                         ptr= s->edge_emu_buffer;

  753.                     }

  754.                 }

  755.                 dest = dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize;

  756.                 qpix_op[1][dxy](dest, ptr, s->linesize);

  757. 

  758.                 mx += s->mv[dir][i][0]/2;

  759.                 my += s->mv[dir][i][1]/2;

  760.             }

  761.         }else{

  762.             for(i=0;i<4;i++) {

  763.                 hpel_motion(s, dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize,

  764.                             ref_picture[0], 0, 0,

  765.                             mb_x * 16 + (i & 1) * 8, mb_y * 16 + (i >>1) * 8,

  766.                             s->width, s->height, s->linesize,

  767.                             s->h_edge_pos, s->v_edge_pos,

  768.                             8, 8, pix_op[1],

  769.                             s->mv[dir][i][0], s->mv[dir][i][1]);

  770. 

  771.                 mx += s->mv[dir][i][0];

  772.                 my += s->mv[dir][i][1];

  773.             }

  774.         }

  775. 

  776.         if(!ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY))

  777.             chroma_4mv_motion(s, dest_cb, dest_cr, ref_picture, pix_op[1], mx, my);

  778.         break;

  779.     case MV_TYPE_FIELD:

  780.         if (s->picture_structure == PICT_FRAME) {

  781.             if(s->quarter_sample){

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

  783.                     qpel_motion(s, dest_y, dest_cb, dest_cr,

  784.                                 1, i, s->field_select[dir][i],

  785.                                 ref_picture, pix_op, qpix_op,

  786.                                 s->mv[dir][i][0], s->mv[dir][i][1], 8);

  787.                 }

  788.             }else{

  789.                 /* top field */

  790.                 mpeg_motion(s, dest_y, dest_cb, dest_cr,

  791.                             1, 0, s->field_select[dir][0],

  792.                             ref_picture, pix_op,

  793.                             s->mv[dir][0][0], s->mv[dir][0][1], 8);

  794.                 /* bottom field */

  795.                 mpeg_motion(s, dest_y, dest_cb, dest_cr,

  796.                             1, 1, s->field_select[dir][1],

  797.                             ref_picture, pix_op,

  798.                             s->mv[dir][1][0], s->mv[dir][1][1], 8);

  799.             }

  800.         } else {

  801.             if(s->picture_structure != s->field_select[dir][0] + 1 && s->pict_type != FF_B_TYPE && !s->first_field){

  802.                 ref_picture= s->current_picture_ptr->data;

  803.             }

  804. 

  805.             mpeg_motion(s, dest_y, dest_cb, dest_cr,

  806.                         0, 0, s->field_select[dir][0],

  807.                         ref_picture, pix_op,

  808.                         s->mv[dir][0][0], s->mv[dir][0][1], 16);

  809.         }

  810.         break;

  811.     case MV_TYPE_16X8:

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

  813.             uint8_t ** ref2picture;

  814. 

  815.             if(s->picture_structure == s->field_select[dir][i] + 1

  816.                || s->pict_type == FF_B_TYPE || s->first_field){

  817.                 ref2picture= ref_picture;

  818.             }else{

  819.                 ref2picture= s->current_picture_ptr->data;

  820.             }

  821. 

  822.             mpeg_motion(s, dest_y, dest_cb, dest_cr,

  823.                         0, 0, s->field_select[dir][i],

  824.                         ref2picture, pix_op,

  825.                         s->mv[dir][i][0], s->mv[dir][i][1] + 16*i, 8);

  826. 

  827.             dest_y += 16*s->linesize;

  828.             dest_cb+= (16>>s->chroma_y_shift)*s->uvlinesize;

  829.             dest_cr+= (16>>s->chroma_y_shift)*s->uvlinesize;

  830.         }

  831.         break;

  832.     case MV_TYPE_DMV:

  833.         if(s->picture_structure == PICT_FRAME){

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

  835.                 int j;

  836.                 for(j=0; j<2; j++){

  837.                     mpeg_motion(s, dest_y, dest_cb, dest_cr,

  838.                                 1, j, j^i,

  839.                                 ref_picture, pix_op,

  840.                                 s->mv[dir][2*i + j][0], s->mv[dir][2*i + j][1], 8);

  841.                 }

  842.                 pix_op = s->dsp.avg_pixels_tab;

  843.             }

  844.         }else{

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

  846.                 mpeg_motion(s, dest_y, dest_cb, dest_cr,

  847.                             0, 0, s->picture_structure != i+1,

  848.                             ref_picture, pix_op,

  849.                             s->mv[dir][2*i][0],s->mv[dir][2*i][1],16);

  850. 

  851.                 // after put we make avg of the same block

  852.                 pix_op=s->dsp.avg_pixels_tab;

  853. 

  854.                 //opposite parity is always in the same frame if this is second field

  855.                 if(!s->first_field){

  856.                     ref_picture = s->current_picture_ptr->data;

  857.                 }

  858.             }

  859.         }

  860.     break;

  861.     default: assert(0);

  862.     }

  863. }

  864. 

  865. #endif /* FFMPEG_MPEGVIDEO_COMMON_H */