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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 void mpeg_motion(MpegEncContext *s,

  242.                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  243.                                int field_based, int bottom_field, int field_select,

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

  245.                                int motion_x, int motion_y, int h)

  246. {

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

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

  249. 

  250. #if 0

  251. if(s->quarter_sample)

  252. {

  253.     motion_x>>=1;

  254.     motion_y>>=1;

  255. }

  256. #endif

  257. 

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

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

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

  261. 

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

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

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

  265. 

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

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

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

  269.             my = motion_y >>1;

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

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

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

  273.         }else{

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

  275.             uvsrc_x = src_x>>1;

  276.             uvsrc_y = src_y>>1;

  277.         }

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

  279.         mx = motion_x / 4;

  280.         my = motion_y / 4;

  281.         uvdxy = 0;

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

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

  284.     } else {

  285.         if(s->chroma_y_shift){

  286.             mx = motion_x / 2;

  287.             my = motion_y / 2;

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

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

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

  291.         } else {

  292.             if(s->chroma_x_shift){

  293.             //Chroma422

  294.                 mx = motion_x / 2;

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

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

  297.                 uvsrc_y = src_y;

  298.             } else {

  299.             //Chroma444

  300.                 uvdxy = dxy;

  301.                 uvsrc_x = src_x;

  302.                 uvsrc_y = src_y;

  303.             }

  304.         }

  305.     }

  306. 

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

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

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

  310. 

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

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

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

  314.                s->codec_id == CODEC_ID_MPEG1VIDEO){

  315.                 av_log(s->avctx,AV_LOG_DEBUG,"MPEG motion vector out of boundary\n");

  316.                 return ;

  317.             }

  318.             ff_emulated_edge_mc(s->edge_emu_buffer, ptr_y, s->linesize, 17, 17+field_based,

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

  320.             ptr_y = s->edge_emu_buffer;

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

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

  323.                 ff_emulated_edge_mc(uvbuf  , ptr_cb, s->uvlinesize, 9, 9+field_based,

  324.                                  uvsrc_x, uvsrc_y<<field_based, s->h_edge_pos>>1, s->v_edge_pos>>1);

  325.                 ff_emulated_edge_mc(uvbuf+16, ptr_cr, s->uvlinesize, 9, 9+field_based,

  326.                                  uvsrc_x, uvsrc_y<<field_based, s->h_edge_pos>>1, s->v_edge_pos>>1);

  327.                 ptr_cb= uvbuf;

  328.                 ptr_cr= uvbuf+16;

  329.             }

  330.     }

  331. 

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

  333.         dest_y += s->linesize;

  334.         dest_cb+= s->uvlinesize;

  335.         dest_cr+= s->uvlinesize;

  336.     }

  337. 

  338.     if(field_select){

  339.         ptr_y += s->linesize;

  340.         ptr_cb+= s->uvlinesize;

  341.         ptr_cr+= s->uvlinesize;

  342.     }

  343. 

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

  345. 

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

  347.         pix_op[s->chroma_x_shift][uvdxy](dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift);

  348.         pix_op[s->chroma_x_shift][uvdxy](dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift);

  349.     }

  350.     if((ENABLE_H261_ENCODER || ENABLE_H261_DECODER) && s->out_format == FMT_H261){

  351.         ff_h261_loop_filter(s);

  352.     }

  353. }

  354. 

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

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

  357.     int x;

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

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

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

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

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

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

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

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

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

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

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

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

  370. 

  371.     x=0;

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

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

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

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

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

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

  378.     x+= stride;

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

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

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

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

  383.     x+= stride;

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

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

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

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

  388.     x+= 2*stride;

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

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

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

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

  393.     x+= 2*stride;

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

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

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

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

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

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

  400.     x+= stride;

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

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

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

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

  405. }

  406. 

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

  408. static inline void obmc_motion(MpegEncContext *s,

  409.                                uint8_t *dest, uint8_t *src,

  410.                                int src_x, int src_y,

  411.                                op_pixels_func *pix_op,

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

  413. #define MID    0

  414. {

  415.     int i;

  416.     uint8_t *ptr[5];

  417. 

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

  419. 

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

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

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

  423.         }else{

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

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

  426.                         src_x, src_y,

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

  428.                         s->h_edge_pos, s->v_edge_pos,

  429.                         8, 8, pix_op,

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

  431.         }

  432.     }

  433. 

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

  435. }

  436. 

  437. static inline void qpel_motion(MpegEncContext *s,

  438.                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  439.                                int field_based, int bottom_field, int field_select,

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

  441.                                qpel_mc_func (*qpix_op)[16],

  442.                                int motion_x, int motion_y, int h)

  443. {

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

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

  446. 

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

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

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

  450. 

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

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

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

  454. 

  455.     if(field_based){

  456.         mx= motion_x/2;

  457.         my= motion_y>>1;

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

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

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

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

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

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

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

  465.     }else{

  466.         mx= motion_x/2;

  467.         my= motion_y/2;

  468.     }

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

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

  471. 

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

  473.     mx>>=1;

  474.     my>>=1;

  475. 

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

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

  478. 

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

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

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

  482. 

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

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

  485.         ff_emulated_edge_mc(s->edge_emu_buffer, ptr_y, s->linesize, 17, 17+field_based,

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

  487.         ptr_y= s->edge_emu_buffer;

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

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

  490.             ff_emulated_edge_mc(uvbuf, ptr_cb, s->uvlinesize, 9, 9 + field_based,

  491.                              uvsrc_x, uvsrc_y<<field_based, s->h_edge_pos>>1, s->v_edge_pos>>1);

  492.             ff_emulated_edge_mc(uvbuf + 16, ptr_cr, s->uvlinesize, 9, 9 + field_based,

  493.                              uvsrc_x, uvsrc_y<<field_based, s->h_edge_pos>>1, s->v_edge_pos>>1);

  494.             ptr_cb= uvbuf;

  495.             ptr_cr= uvbuf + 16;

  496.         }

  497.     }

  498. 

  499.     if(!field_based)

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

  501.     else{

  502.         if(bottom_field){

  503.             dest_y += s->linesize;

  504.             dest_cb+= s->uvlinesize;

  505.             dest_cr+= s->uvlinesize;

  506.         }

  507. 

  508.         if(field_select){

  509.             ptr_y  += s->linesize;

  510.             ptr_cb += s->uvlinesize;

  511.             ptr_cr += s->uvlinesize;

  512.         }

  513.         //damn interlaced mode

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

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

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

  517.     }

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

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

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

  521.     }

  522. }

  523. 

  524. /**

  525.  * h263 chroma 4mv motion compensation.

  526.  */

  527. static inline void chroma_4mv_motion(MpegEncContext *s,

  528.                                      uint8_t *dest_cb, uint8_t *dest_cr,

  529.                                      uint8_t **ref_picture,

  530.                                      op_pixels_func *pix_op,

  531.                                      int mx, int my){

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

  533.     uint8_t *ptr;

  534. 

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

  536.        with a special rounding */

  537.     mx= ff_h263_round_chroma(mx);

  538.     my= ff_h263_round_chroma(my);

  539. 

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

  541.     mx >>= 1;

  542.     my >>= 1;

  543. 

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

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

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

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

  548.         dxy &= ~1;

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

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

  551.         dxy &= ~2;

  552. 

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

  554.     ptr = ref_picture[1] + offset;

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

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

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

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

  559.             ptr= s->edge_emu_buffer;

  560.             emu=1;

  561.         }

  562.     }

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

  564. 

  565.     ptr = ref_picture[2] + offset;

  566.     if(emu){

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

  568.         ptr= s->edge_emu_buffer;

  569.     }

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

  571. }

  572. 

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

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

  575.      * optimized for 64byte cache lines */

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

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

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

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

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

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

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

  583. }

  584. 

  585. /**

  586.  * motion compensation of a single macroblock

  587.  * @param s context

  588.  * @param dest_y luma destination pointer

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

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

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

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

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

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

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

  596.  */

  597. static inline void MPV_motion(MpegEncContext *s,

  598.                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  599.                               int dir, uint8_t **ref_picture,

  600.                               op_pixels_func (*pix_op)[4], qpel_mc_func (*qpix_op)[16])

  601. {

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

  603.     int mb_x, mb_y, i;

  604.     uint8_t *ptr, *dest;

  605. 

  606.     mb_x = s->mb_x;

  607.     mb_y = s->mb_y;

  608. 

  609.     prefetch_motion(s, ref_picture, dir);

  610. 

  611.     if(s->obmc && s->pict_type != B_TYPE){

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

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

  614.         const int mot_stride= s->b8_stride;

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

  616. 

  617.         assert(!s->mb_skipped);

  618. 

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

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

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

  622. 

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

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

  625.         }else{

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

  627.         }

  628. 

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

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

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

  632.         }else{

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

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

  635.         }

  636. 

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

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

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

  640.         }else{

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

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

  643.         }

  644. 

  645.         mx = 0;

  646.         my = 0;

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

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

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

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

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

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

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

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

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

  656.             //FIXME cleanup

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

  658.                         ref_picture[0],

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

  660.                         pix_op[1],

  661.                         mv);

  662. 

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

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

  665.         }

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

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

  668. 

  669.         return;

  670.     }

  671. 

  672.     switch(s->mv_type) {

  673.     case MV_TYPE_16X16:

  674.         if(s->mcsel){

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

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

  677.                             ref_picture);

  678.             }else{

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

  680.                             ref_picture);

  681.             }

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

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

  684.                         0, 0, 0,

  685.                         ref_picture, pix_op, qpix_op,

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

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

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

  689.                         ref_picture, pix_op,

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

  691.         }else

  692.         {

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

  694.                         0, 0, 0,

  695.                         ref_picture, pix_op,

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

  697.         }

  698.         break;

  699.     case MV_TYPE_8X8:

  700.         mx = 0;

  701.         my = 0;

  702.         if(s->quarter_sample){

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

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

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

  706. 

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

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

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

  710. 

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

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

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

  714.                     dxy &= ~3;

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

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

  717.                     dxy &= ~12;

  718. 

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

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

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

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

  723.                         ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->linesize, 9, 9, src_x, src_y, s->h_edge_pos, s->v_edge_pos);

  724.                         ptr= s->edge_emu_buffer;

  725.                     }

  726.                 }

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

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

  729. 

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

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

  732.             }

  733.         }else{

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

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

  736.                             ref_picture[0], 0, 0,

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

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

  739.                             s->h_edge_pos, s->v_edge_pos,

  740.                             8, 8, pix_op[1],

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

  742. 

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

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

  745.             }

  746.         }

  747. 

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

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

  750.         break;

  751.     case MV_TYPE_FIELD:

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

  753.             if(s->quarter_sample){

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

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

  756.                                 1, i, s->field_select[dir][i],

  757.                                 ref_picture, pix_op, qpix_op,

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

  759.                 }

  760.             }else{

  761.                 /* top field */

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

  763.                             1, 0, s->field_select[dir][0],

  764.                             ref_picture, pix_op,

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

  766.                 /* bottom field */

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

  768.                             1, 1, s->field_select[dir][1],

  769.                             ref_picture, pix_op,

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

  771.             }

  772.         } else {

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

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

  775.             }

  776. 

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

  778.                         0, 0, s->field_select[dir][0],

  779.                         ref_picture, pix_op,

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

  781.         }

  782.         break;

  783.     case MV_TYPE_16X8:

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

  785.             uint8_t ** ref2picture;

  786. 

  787.             if(s->picture_structure == s->field_select[dir][i] + 1 || s->pict_type == B_TYPE || s->first_field){

  788.                 ref2picture= ref_picture;

  789.             }else{

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

  791.             }

  792. 

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

  794.                         0, 0, s->field_select[dir][i],

  795.                         ref2picture, pix_op,

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

  797. 

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

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

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

  801.         }

  802.         break;

  803.     case MV_TYPE_DMV:

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

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

  806.                 int j;

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

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

  809.                                 1, j, j^i,

  810.                                 ref_picture, pix_op,

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

  812.                 }

  813.                 pix_op = s->dsp.avg_pixels_tab;

  814.             }

  815.         }else{

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

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

  818.                             0, 0, s->picture_structure != i+1,

  819.                             ref_picture, pix_op,

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

  821. 

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

  823.                 pix_op=s->dsp.avg_pixels_tab;

  824. 

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

  826.                 if(!s->first_field){

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

  828.                 }

  829.             }

  830.         }

  831.     break;

  832.     default: assert(0);

  833.     }

  834. }

  835. 

  836. #endif /* FFMPEG_MPEGVIDEO_COMMON_H */