static av_always_inline void mpeg_motion_lowres(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int field_based, int bottom_field, int field_select, uint8_t **ref_picture, h264_chroma_mc_func *pix_op, int motion_x, int motion_y, int h, int mb_y) { uint8_t *ptr_y, *ptr_cb, *ptr_cr; int mx, my, src_x, src_y, uvsrc_x, uvsrc_y, uvlinesize, linesize, sx, sy, uvsx, uvsy; 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; const int v_edge_pos = s->v_edge_pos >> lowres; linesize = s->current_picture.f.linesize[0] << field_based; uvlinesize = s->current_picture.f.linesize[1] << field_based; // FIXME obviously not perfect but qpel will not work in lowres anyway if (s->quarter_sample) { motion_x /= 2; motion_y /= 2; } if (field_based) { motion_y += (bottom_field - field_select) * (1 << lowres - 1); } sx = motion_x & s_mask; sy = motion_y & s_mask; src_x = s->mb_x * 2 * block_s + (motion_x >> lowres + 1); src_y = (mb_y * 2 * block_s >> field_based) + (motion_y >> lowres + 1); if (s->out_format == FMT_H263) { uvsx = ((motion_x >> 1) & s_mask) | (sx & 1); uvsy = ((motion_y >> 1) & s_mask) | (sy & 1); uvsrc_x = src_x >> 1; uvsrc_y = src_y >> 1; } else if (s->out_format == FMT_H261) { // even chroma mv's are full pel in H261 mx = motion_x / 4; my = motion_y / 4; uvsx = (2 * mx) & s_mask; uvsy = (2 * my) & s_mask; uvsrc_x = s->mb_x * block_s + (mx >> lowres); uvsrc_y = mb_y * block_s + (my >> lowres); } else { mx = motion_x / 2; my = motion_y / 2; uvsx = mx & s_mask; uvsy = my & s_mask; uvsrc_x = s->mb_x * block_s + (mx >> lowres + 1); uvsrc_y = (mb_y * block_s >> field_based) + (my >> lowres + 1); } ptr_y = ref_picture[0] + src_y * linesize + src_x; ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x; ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x; if ((unsigned) src_x > h_edge_pos - (!!sx) - 2 * block_s || (unsigned) src_y > (v_edge_pos >> field_based) - (!!sy) - h) { s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr_y, s->linesize, 17, 17 + field_based, src_x, src_y << field_based, h_edge_pos, v_edge_pos); ptr_y = s->edge_emu_buffer; if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) { uint8_t *uvbuf = s->edge_emu_buffer + 18 * s->linesize; s->dsp.emulated_edge_mc(uvbuf , ptr_cb, s->uvlinesize, 9, 9 + field_based, uvsrc_x, uvsrc_y << field_based, h_edge_pos >> 1, v_edge_pos >> 1); s->dsp.emulated_edge_mc(uvbuf + 16, ptr_cr, s->uvlinesize, 9, 9 + field_based, uvsrc_x, uvsrc_y << field_based, h_edge_pos >> 1, v_edge_pos >> 1); ptr_cb = uvbuf; ptr_cr = uvbuf + 16; } } // FIXME use this for field pix too instead of the obnoxious hack which changes picture.f.data if (bottom_field) { dest_y += s->linesize; dest_cb += s->uvlinesize; dest_cr += s->uvlinesize; } if (field_select) { ptr_y += s->linesize; ptr_cb += s->uvlinesize; ptr_cr += s->uvlinesize; } sx = (sx << 2) >> lowres; sy = (sy << 2) >> lowres; pix_op[lowres - 1](dest_y, ptr_y, linesize, h, sx, sy); 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 }