- if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
- uvsx= (uvsx << 2) >> lowres;
- uvsy= (uvsy << 2) >> lowres;
- pix_op[op_index](dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift, uvsx, uvsy);
- pix_op[op_index](dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift, uvsx, uvsy);
- }
- //FIXME h261 lowres loop filter
-}
-
-static inline void chroma_4mv_motion_lowres(MpegEncContext *s,
- uint8_t *dest_cb, uint8_t *dest_cr,
- uint8_t **ref_picture,
- h264_chroma_mc_func *pix_op,
- int mx, int my){
- const int lowres= s->avctx->lowres;
- const int op_index= FFMIN(lowres, 2);
- const int block_s= 8>>lowres;
- const int s_mask= (2<<lowres)-1;
- const int h_edge_pos = s->h_edge_pos >> (lowres+1);
- const int v_edge_pos = s->v_edge_pos >> (lowres+1);
- int emu=0, src_x, src_y, offset, sx, sy;
- uint8_t *ptr;
-
- if(s->quarter_sample){
- mx/=2;
- my/=2;
- }
-
- /* In case of 8X8, we construct a single chroma motion vector
- with a special rounding */
- mx= ff_h263_round_chroma(mx);
- my= ff_h263_round_chroma(my);
-
- sx= mx & s_mask;
- sy= my & s_mask;
- src_x = s->mb_x*block_s + (mx >> (lowres+1));
- src_y = s->mb_y*block_s + (my >> (lowres+1));
-
- offset = src_y * s->uvlinesize + src_x;
- ptr = ref_picture[1] + offset;
- if(s->flags&CODEC_FLAG_EMU_EDGE){
- if( (unsigned)src_x > h_edge_pos - (!!sx) - block_s
- || (unsigned)src_y > v_edge_pos - (!!sy) - block_s){
- ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9, src_x, src_y, h_edge_pos, v_edge_pos);
- ptr= s->edge_emu_buffer;
- emu=1;
- }
- }
- sx= (sx << 2) >> lowres;
- sy= (sy << 2) >> lowres;
- pix_op[op_index](dest_cb, ptr, s->uvlinesize, block_s, sx, sy);
-
- ptr = ref_picture[2] + offset;
- if(emu){
- ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9, src_x, src_y, h_edge_pos, v_edge_pos);
- ptr= s->edge_emu_buffer;
- }
- pix_op[op_index](dest_cr, ptr, s->uvlinesize, block_s, sx, sy);
-}
-
-/**
- * motion compensation of a single macroblock
- * @param s context
- * @param dest_y luma destination pointer
- * @param dest_cb chroma cb/u destination pointer
- * @param dest_cr chroma cr/v destination pointer
- * @param dir direction (0->forward, 1->backward)
- * @param ref_picture array[3] of pointers to the 3 planes of the reference picture
- * @param pic_op halfpel motion compensation function (average or put normally)
- * the motion vectors are taken from s->mv and the MV type from s->mv_type
- */
-static inline void MPV_motion_lowres(MpegEncContext *s,
- uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
- int dir, uint8_t **ref_picture,
- h264_chroma_mc_func *pix_op)
-{
- int mx, my;
- int mb_x, mb_y, i;
- const int lowres= s->avctx->lowres;
- const int block_s= 8>>lowres;
-
- mb_x = s->mb_x;
- mb_y = s->mb_y;
-
- switch(s->mv_type) {
- case MV_TYPE_16X16:
- mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
- 0, 0, 0,
- ref_picture, pix_op,
- s->mv[dir][0][0], s->mv[dir][0][1], 2*block_s, mb_y);
- break;
- case MV_TYPE_8X8:
- mx = 0;
- my = 0;
- for(i=0;i<4;i++) {
- hpel_motion_lowres(s, dest_y + ((i & 1) + (i >> 1) * s->linesize)*block_s,
- ref_picture[0], 0, 0,
- (2*mb_x + (i & 1))*block_s, (2*mb_y + (i >>1))*block_s,
- s->width, s->height, s->linesize,
- s->h_edge_pos >> lowres, s->v_edge_pos >> lowres,
- block_s, block_s, pix_op,
- s->mv[dir][i][0], s->mv[dir][i][1]);
-
- mx += s->mv[dir][i][0];
- my += s->mv[dir][i][1];
- }
-
- if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY))
- chroma_4mv_motion_lowres(s, dest_cb, dest_cr, ref_picture, pix_op, mx, my);
- break;
- case MV_TYPE_FIELD:
- if (s->picture_structure == PICT_FRAME) {
- /* top field */
- mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
- 1, 0, s->field_select[dir][0],
- ref_picture, pix_op,
- s->mv[dir][0][0], s->mv[dir][0][1], block_s, mb_y);
- /* bottom field */
- mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
- 1, 1, s->field_select[dir][1],
- ref_picture, pix_op,
- s->mv[dir][1][0], s->mv[dir][1][1], block_s, mb_y);
- } else {
- if(s->picture_structure != s->field_select[dir][0] + 1 && s->pict_type != FF_B_TYPE && !s->first_field){
- ref_picture= s->current_picture_ptr->data;
- }
-
- mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
- 0, 0, s->field_select[dir][0],
- ref_picture, pix_op,
- s->mv[dir][0][0], s->mv[dir][0][1], 2*block_s, mb_y>>1);
- }
- break;
- case MV_TYPE_16X8:
- for(i=0; i<2; i++){
- uint8_t ** ref2picture;
-
- if(s->picture_structure == s->field_select[dir][i] + 1 || s->pict_type == FF_B_TYPE || s->first_field){
- ref2picture= ref_picture;
- }else{
- ref2picture= s->current_picture_ptr->data;
- }
-
- mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
- 0, 0, s->field_select[dir][i],
- ref2picture, pix_op,
- s->mv[dir][i][0], s->mv[dir][i][1] + 2*block_s*i, block_s, mb_y>>1);
-
- dest_y += 2*block_s*s->linesize;
- dest_cb+= (2*block_s>>s->chroma_y_shift)*s->uvlinesize;
- dest_cr+= (2*block_s>>s->chroma_y_shift)*s->uvlinesize;
- }
- break;
- case MV_TYPE_DMV:
- if(s->picture_structure == PICT_FRAME){
- for(i=0; i<2; i++){
- int j;
- for(j=0; j<2; j++){
- mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
- 1, j, j^i,
- ref_picture, pix_op,
- s->mv[dir][2*i + j][0], s->mv[dir][2*i + j][1], block_s, mb_y);
- }
- pix_op = s->dsp.avg_h264_chroma_pixels_tab;
- }
- }else{
- for(i=0; i<2; i++){
- mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
- 0, 0, s->picture_structure != i+1,
- ref_picture, pix_op,
- s->mv[dir][2*i][0],s->mv[dir][2*i][1],2*block_s, mb_y>>1);
-
- // after put we make avg of the same block
- pix_op = s->dsp.avg_h264_chroma_pixels_tab;
-
- //opposite parity is always in the same frame if this is second field
- if(!s->first_field){
- ref_picture = s->current_picture_ptr->data;
- }
- }
- }
- break;
- default: assert(0);
- }