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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 AVCODEC_MPEGVIDEO_COMMON_H

  31. #define AVCODEC_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. 

  45. /**

  46.  * allocates a Picture

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

  48.  */

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

  50. 

  51. /**

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

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

  54.  */

  55. void MPV_common_defaults(MpegEncContext *s);

  56. 

  57. static inline void gmc1_motion(MpegEncContext *s,

  58.                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  59.                                uint8_t **ref_picture)

  60. {

  61.     uint8_t *ptr;

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

  63.     int motion_x, motion_y;

  64.     int emu=0;

  65. 

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

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

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

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

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

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

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

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

  74.         motion_x =0;

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

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

  77.         motion_y =0;

  78. 

  79.     linesize = s->linesize;

  80.     uvlinesize = s->uvlinesize;

  81. 

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

  83. 

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

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

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

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

  88.             ptr= s->edge_emu_buffer;

  89.         }

  90.     }

  91. 

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

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

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

  95.     }else{

  96.         int dxy;

  97. 

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

  99.         if (s->no_rounding){

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

  101.         }else{

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

  103.         }

  104.     }

  105. 

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

  107. 

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

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

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

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

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

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

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

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

  116.         motion_x =0;

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

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

  119.         motion_y =0;

  120. 

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

  122.     ptr = ref_picture[1] + offset;

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

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

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

  126.             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);

  127.             ptr= s->edge_emu_buffer;

  128.             emu=1;

  129.         }

  130.     }

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

  132. 

  133.     ptr = ref_picture[2] + offset;

  134.     if(emu){

  135.         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);

  136.         ptr= s->edge_emu_buffer;

  137.     }

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

  139. 

  140.     return;

  141. }

  142. 

  143. static inline void gmc_motion(MpegEncContext *s,

  144.                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  145.                                uint8_t **ref_picture)

  146. {

  147.     uint8_t *ptr;

  148.     int linesize, uvlinesize;

  149.     const int a= s->sprite_warping_accuracy;

  150.     int ox, oy;

  151. 

  152.     linesize = s->linesize;

  153.     uvlinesize = s->uvlinesize;

  154. 

  155.     ptr = ref_picture[0];

  156. 

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

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

  159. 

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

  161.            ox,

  162.            oy,

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

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

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

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

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

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

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

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

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

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

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

  174. 

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

  176. 

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

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

  179. 

  180.     ptr = ref_picture[1];

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

  182.            ox,

  183.            oy,

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

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

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

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

  188. 

  189.     ptr = ref_picture[2];

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

  191.            ox,

  192.            oy,

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

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

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

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

  197. }

  198. 

  199. static inline int hpel_motion(MpegEncContext *s,

  200.                                   uint8_t *dest, uint8_t *src,

  201.                                   int field_based, int field_select,

  202.                                   int src_x, int src_y,

  203.                                   int width, int height, int stride,

  204.                                   int h_edge_pos, int v_edge_pos,

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

  206.                                   int motion_x, int motion_y)

  207. {

  208.     int dxy;

  209.     int emu=0;

  210. 

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

  212.     src_x += motion_x >> 1;

  213.     src_y += motion_y >> 1;

  214. 

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

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

  217.     if (src_x == width)

  218.         dxy &= ~1;

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

  220.     if (src_y == height)

  221.         dxy &= ~2;

  222.     src += src_y * stride + src_x;

  223. 

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

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

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

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

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

  229.             src= s->edge_emu_buffer;

  230.             emu=1;

  231.         }

  232.     }

  233.     if(field_select)

  234.         src += s->linesize;

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

  236.     return emu;

  237. }

  238. 

  239. static av_always_inline

  240. void mpeg_motion_internal(MpegEncContext *s,

  241.                  uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  242.                  int field_based, int bottom_field, int field_select,

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

  244.                  int motion_x, int motion_y, int h, int is_mpeg12)

  245. {

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

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

  248.         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 (!is_mpeg12 && 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(!is_mpeg12 && 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(is_mpeg12 || s->codec_id == CODEC_ID_MPEG2VIDEO ||

  314.                s->codec_id == CODEC_ID_MPEG1VIDEO){

  315.                 av_log(s->avctx,AV_LOG_DEBUG,

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

  317.                 return ;

  318.             }

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

  320.                                 17, 17+field_based,

  321.                                 src_x, src_y<<field_based,

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

  323.             ptr_y = s->edge_emu_buffer;

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

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

  326.                 ff_emulated_edge_mc(uvbuf ,

  327.                                     ptr_cb, s->uvlinesize,

  328.                                     9, 9+field_based,

  329.                                     uvsrc_x, uvsrc_y<<field_based,

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

  331.                 ff_emulated_edge_mc(uvbuf+16,

  332.                                     ptr_cr, s->uvlinesize,

  333.                                     9, 9+field_based,

  334.                                     uvsrc_x, uvsrc_y<<field_based,

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

  336.                 ptr_cb= uvbuf;

  337.                 ptr_cr= uvbuf+16;

  338.             }

  339.     }

  340. 

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

  342.         dest_y += s->linesize;

  343.         dest_cb+= s->uvlinesize;

  344.         dest_cr+= s->uvlinesize;

  345.     }

  346. 

  347.     if(field_select){

  348.         ptr_y += s->linesize;

  349.         ptr_cb+= s->uvlinesize;

  350.         ptr_cr+= s->uvlinesize;

  351.     }

  352. 

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

  354. 

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

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

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

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

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

  360.     }

  361.     if(!is_mpeg12 && (ENABLE_H261_ENCODER || ENABLE_H261_DECODER) &&

  362.          s->out_format == FMT_H261){

  363.         ff_h261_loop_filter(s);

  364.     }

  365. }

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

  367. static av_always_inline

  368. void mpeg_motion(MpegEncContext *s,

  369.                  uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  370.                  int field_based, int bottom_field, int field_select,

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

  372.                  int motion_x, int motion_y, int h)

  373. {

  374. #ifndef CONFIG_SMALL

  375.     if(s->out_format == FMT_MPEG1)

  376.         mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, field_based,

  377.                     bottom_field, field_select, ref_picture, pix_op,

  378.                     motion_x, motion_y, h, 1);

  379.     else

  380. #endif

  381.         mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, field_based,

  382.                     bottom_field, field_select, ref_picture, pix_op,

  383.                     motion_x, motion_y, h, 0);

  384. }

  385. 

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

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

  388.     int x;

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

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

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

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

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

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

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

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

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

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

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

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

  401. 

  402.     x=0;

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

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

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

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

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

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

  409.     x+= stride;

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

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

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

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

  414.     x+= stride;

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

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

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

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

  419.     x+= 2*stride;

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

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

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

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

  424.     x+= 2*stride;

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

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

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

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

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

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

  431.     x+= stride;

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

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

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

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

  436. }

  437. 

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

  439. static inline void obmc_motion(MpegEncContext *s,

  440.                                uint8_t *dest, uint8_t *src,

  441.                                int src_x, int src_y,

  442.                                op_pixels_func *pix_op,

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

  444. #define MID    0

  445. {

  446.     int i;

  447.     uint8_t *ptr[5];

  448. 

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

  450. 

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

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

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

  454.         }else{

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

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

  457.                         src_x, src_y,

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

  459.                         s->h_edge_pos, s->v_edge_pos,

  460.                         8, 8, pix_op,

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

  462.         }

  463.     }

  464. 

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

  466. }

  467. 

  468. static inline void qpel_motion(MpegEncContext *s,

  469.                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  470.                                int field_based, int bottom_field, int field_select,

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

  472.                                qpel_mc_func (*qpix_op)[16],

  473.                                int motion_x, int motion_y, int h)

  474. {

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

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

  477. 

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

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

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

  481. 

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

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

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

  485. 

  486.     if(field_based){

  487.         mx= motion_x/2;

  488.         my= motion_y>>1;

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

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

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

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

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

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

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

  496.     }else{

  497.         mx= motion_x/2;

  498.         my= motion_y/2;

  499.     }

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

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

  502. 

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

  504.     mx>>=1;

  505.     my>>=1;

  506. 

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

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

  509. 

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

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

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

  513. 

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

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

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

  517.                             17, 17+field_based, src_x, src_y<<field_based,

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

  519.         ptr_y= s->edge_emu_buffer;

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

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

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

  523.                                 9, 9 + field_based,

  524.                                 uvsrc_x, uvsrc_y<<field_based,

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

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

  527.                                 9, 9 + field_based,

  528.                                 uvsrc_x, uvsrc_y<<field_based,

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

  530.             ptr_cb= uvbuf;

  531.             ptr_cr= uvbuf + 16;

  532.         }

  533.     }

  534. 

  535.     if(!field_based)

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

  537.     else{

  538.         if(bottom_field){

  539.             dest_y += s->linesize;

  540.             dest_cb+= s->uvlinesize;

  541.             dest_cr+= s->uvlinesize;

  542.         }

  543. 

  544.         if(field_select){

  545.             ptr_y  += s->linesize;

  546.             ptr_cb += s->uvlinesize;

  547.             ptr_cr += s->uvlinesize;

  548.         }

  549.         //damn interlaced mode

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

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

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

  553.     }

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

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

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

  557.     }

  558. }

  559. 

  560. /**

  561.  * h263 chroma 4mv motion compensation.

  562.  */

  563. static inline void chroma_4mv_motion(MpegEncContext *s,

  564.                                      uint8_t *dest_cb, uint8_t *dest_cr,

  565.                                      uint8_t **ref_picture,

  566.                                      op_pixels_func *pix_op,

  567.                                      int mx, int my){

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

  569.     uint8_t *ptr;

  570. 

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

  572.        with a special rounding */

  573.     mx= ff_h263_round_chroma(mx);

  574.     my= ff_h263_round_chroma(my);

  575. 

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

  577.     mx >>= 1;

  578.     my >>= 1;

  579. 

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

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

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

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

  584.         dxy &= ~1;

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

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

  587.         dxy &= ~2;

  588. 

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

  590.     ptr = ref_picture[1] + offset;

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

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

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

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

  595.                                 9, 9, src_x, src_y,

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

  597.             ptr= s->edge_emu_buffer;

  598.             emu=1;

  599.         }

  600.     }

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

  602. 

  603.     ptr = ref_picture[2] + offset;

  604.     if(emu){

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

  606.                             9, 9, src_x, src_y,

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

  608.         ptr= s->edge_emu_buffer;

  609.     }

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

  611. }

  612. 

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

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

  615.      * optimized for 64byte cache lines */

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

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

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

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

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

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

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

  623. }

  624. 

  625. /**

  626.  * motion compensation of a single macroblock

  627.  * @param s context

  628.  * @param dest_y luma destination pointer

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

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

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

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

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

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

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

  636.  */

  637. static av_always_inline void MPV_motion_internal(MpegEncContext *s,

  638.                               uint8_t *dest_y, uint8_t *dest_cb,

  639.                               uint8_t *dest_cr, int dir,

  640.                               uint8_t **ref_picture,

  641.                               op_pixels_func (*pix_op)[4],

  642.                               qpel_mc_func (*qpix_op)[16], int is_mpeg12)

  643. {

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

  645.     int mb_x, mb_y, i;

  646.     uint8_t *ptr, *dest;

  647. 

  648.     mb_x = s->mb_x;

  649.     mb_y = s->mb_y;

  650. 

  651.     prefetch_motion(s, ref_picture, dir);

  652. 

  653.     if(!is_mpeg12 && s->obmc && s->pict_type != FF_B_TYPE){

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

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

  656.         const int mot_stride= s->b8_stride;

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

  658. 

  659.         assert(!s->mb_skipped);

  660. 

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

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

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

  664. 

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

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

  667.         }else{

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

  669.         }

  670. 

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

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

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

  674.         }else{

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

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

  677.         }

  678. 

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

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

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

  682.         }else{

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

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

  685.         }

  686. 

  687.         mx = 0;

  688.         my = 0;

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

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

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

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

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

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

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

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

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

  698.             //FIXME cleanup

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

  700.                         ref_picture[0],

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

  702.                         pix_op[1],

  703.                         mv);

  704. 

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

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

  707.         }

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

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

  710. 

  711.         return;

  712.     }

  713. 

  714.     switch(s->mv_type) {

  715.     case MV_TYPE_16X16:

  716.         if(s->mcsel){

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

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

  719.                             ref_picture);

  720.             }else{

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

  722.                             ref_picture);

  723.             }

  724.         }else if(!is_mpeg12 && s->quarter_sample){

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

  726.                         0, 0, 0,

  727.                         ref_picture, pix_op, qpix_op,

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

  729.         }else if(!is_mpeg12 && ENABLE_WMV2 && s->mspel){

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

  731.                         ref_picture, pix_op,

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

  733.         }else

  734.         {

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

  736.                         0, 0, 0,

  737.                         ref_picture, pix_op,

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

  739.         }

  740.         break;

  741.     case MV_TYPE_8X8:

  742.     if (!is_mpeg12) {

  743.         mx = 0;

  744.         my = 0;

  745.         if(s->quarter_sample){

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

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

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

  749. 

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

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

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

  753. 

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

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

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

  757.                     dxy &= ~3;

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

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

  760.                     dxy &= ~12;

  761. 

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

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

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

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

  766.                         ff_emulated_edge_mc(s->edge_emu_buffer, ptr,

  767.                                             s->linesize, 9, 9,

  768.                                             src_x, src_y,

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

  770.                         ptr= s->edge_emu_buffer;

  771.                     }

  772.                 }

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

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

  775. 

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

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

  778.             }

  779.         }else{

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

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

  782.                             ref_picture[0], 0, 0,

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

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

  785.                             s->h_edge_pos, s->v_edge_pos,

  786.                             8, 8, pix_op[1],

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

  788. 

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

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

  791.             }

  792.         }

  793. 

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

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

  796.     }

  797.         break;

  798.     case MV_TYPE_FIELD:

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

  800.             if(!is_mpeg12 && s->quarter_sample){

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

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

  803.                                 1, i, s->field_select[dir][i],

  804.                                 ref_picture, pix_op, qpix_op,

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

  806.                 }

  807.             }else{

  808.                 /* top field */

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

  810.                             1, 0, s->field_select[dir][0],

  811.                             ref_picture, pix_op,

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

  813.                 /* bottom field */

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

  815.                             1, 1, s->field_select[dir][1],

  816.                             ref_picture, pix_op,

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

  818.             }

  819.         } else {

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

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

  822.             }

  823. 

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

  825.                         0, 0, s->field_select[dir][0],

  826.                         ref_picture, pix_op,

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

  828.         }

  829.         break;

  830.     case MV_TYPE_16X8:

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

  832.             uint8_t ** ref2picture;

  833. 

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

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

  836.                 ref2picture= ref_picture;

  837.             }else{

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

  839.             }

  840. 

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

  842.                         0, 0, s->field_select[dir][i],

  843.                         ref2picture, pix_op,

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

  845. 

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

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

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

  849.         }

  850.         break;

  851.     case MV_TYPE_DMV:

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

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

  854.                 int j;

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

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

  857.                                 1, j, j^i,

  858.                                 ref_picture, pix_op,

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

  860.                 }

  861.                 pix_op = s->dsp.avg_pixels_tab;

  862.             }

  863.         }else{

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

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

  866.                             0, 0, s->picture_structure != i+1,

  867.                             ref_picture, pix_op,

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

  869. 

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

  871.                 pix_op=s->dsp.avg_pixels_tab;

  872. 

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

  874.                 if(!s->first_field){

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

  876.                 }

  877.             }

  878.         }

  879.     break;

  880.     default: assert(0);

  881.     }

  882. }

  883. 

  884. static inline void MPV_motion(MpegEncContext *s,

  885.                               uint8_t *dest_y, uint8_t *dest_cb,

  886.                               uint8_t *dest_cr, int dir,

  887.                               uint8_t **ref_picture,

  888.                               op_pixels_func (*pix_op)[4],

  889.                               qpel_mc_func (*qpix_op)[16])

  890. {

  891. #ifndef CONFIG_SMALL

  892.     if(s->out_format == FMT_MPEG1)

  893.         MPV_motion_internal(s, dest_y, dest_cb, dest_cr, dir,

  894.                             ref_picture, pix_op, qpix_op, 1);

  895.     else

  896. #endif

  897.         MPV_motion_internal(s, dest_y, dest_cb, dest_cr, dir,

  898.                             ref_picture, pix_op, qpix_op, 0);

  899. }

  900. #endif /* AVCODEC_MPEGVIDEO_COMMON_H */