void ff_mspel_motion(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t **ref_picture, op_pixels_func (*pix_op)[4], int motion_x, int motion_y, int h) { Wmv2Context * const w= (Wmv2Context*)s; uint8_t *ptr; int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize; int emu=0; dxy = ((motion_y & 1) << 1) | (motion_x & 1); dxy = 2*dxy + w->hshift; src_x = s->mb_x * 16 + (motion_x >> 1); src_y = s->mb_y * 16 + (motion_y >> 1); /* WARNING: do no forget half pels */ v_edge_pos = s->v_edge_pos; src_x = av_clip(src_x, -16, s->width); src_y = av_clip(src_y, -16, s->height); if(src_x<=-16 || src_x >= s->width) dxy &= ~3; if(src_y<=-16 || src_y >= s->height) dxy &= ~4; linesize = s->linesize; uvlinesize = s->uvlinesize; ptr = ref_picture[0] + (src_y * linesize) + src_x; if(src_x<1 || src_y<1 || src_x + 17 >= s->h_edge_pos || src_y + h+1 >= v_edge_pos){ s->vdsp.emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19, src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos); ptr= s->edge_emu_buffer + 1 + s->linesize; emu=1; } s->dsp.put_mspel_pixels_tab[dxy](dest_y , ptr , linesize); s->dsp.put_mspel_pixels_tab[dxy](dest_y+8 , ptr+8 , linesize); s->dsp.put_mspel_pixels_tab[dxy](dest_y +8*linesize, ptr +8*linesize, linesize); s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize); if(s->flags&CODEC_FLAG_GRAY) return; if (s->out_format == FMT_H263) { dxy = 0; if ((motion_x & 3) != 0) dxy |= 1; if ((motion_y & 3) != 0) dxy |= 2; mx = motion_x >> 2; my = motion_y >> 2; } else { mx = motion_x / 2; my = motion_y / 2; dxy = ((my & 1) << 1) | (mx & 1); mx >>= 1; my >>= 1; } src_x = s->mb_x * 8 + mx; src_y = s->mb_y * 8 + my; src_x = av_clip(src_x, -8, s->width >> 1); if (src_x == (s->width >> 1)) dxy &= ~1; src_y = av_clip(src_y, -8, s->height >> 1); if (src_y == (s->height >> 1)) dxy &= ~2; offset = (src_y * uvlinesize) + src_x; ptr = ref_picture[1] + offset; if(emu){ s->vdsp.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); ptr= s->edge_emu_buffer; } pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1); ptr = ref_picture[2] + offset; if(emu){ s->vdsp.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); ptr= s->edge_emu_buffer; } pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1); }