void vp9_init_dequantizer(VP9_COMMON *pc) {
int q;
for (q = 0; q < QINDEX_RANGE; q++) {
// DC value
pc->y_dequant[q][0] = vp9_dc_quant(q, pc->y_dc_delta_q);
pc->uv_dequant[q][0] = vp9_dc_quant(q, pc->uv_dc_delta_q);
// AC values
pc->y_dequant[q][1] = vp9_ac_quant(q, 0);
pc->uv_dequant[q][1] = vp9_ac_quant(q, pc->uv_ac_delta_q);
}
}
int vp9_compute_rd_mult(const VP9_COMP *cpi, int qindex) {
const int64_t q = vp9_dc_quant(qindex, 0, cpi->common.bit_depth);
#if CONFIG_VP9_HIGHBITDEPTH
int64_t rdmult = 0;
switch (cpi->common.bit_depth) {
case VPX_BITS_8:
rdmult = 88 * q * q / 24;
break;
case VPX_BITS_10:
rdmult = ROUND_POWER_OF_TWO(88 * q * q / 24, 4);
break;
case VPX_BITS_12:
rdmult = ROUND_POWER_OF_TWO(88 * q * q / 24, 8);
break;
default:
assert(0 && "bit_depth should be VPX_BITS_8, VPX_BITS_10 or VPX_BITS_12");
return -1;
}
#else
int64_t rdmult = 88 * q * q / 24;
#endif // CONFIG_VP9_HIGHBITDEPTH
if (cpi->oxcf.pass == 2 && (cpi->common.frame_type != KEY_FRAME)) {
const GF_GROUP *const gf_group = &cpi->twopass.gf_group;
const FRAME_UPDATE_TYPE frame_type = gf_group->update_type[gf_group->index];
const int boost_index = VPXMIN(15, (cpi->rc.gfu_boost / 100));
rdmult = (rdmult * rd_frame_type_factor[frame_type]) >> 7;
rdmult += ((rdmult * rd_boost_factor[boost_index]) >> 7);
}
if (rdmult < 1)
rdmult = 1;
return (int)rdmult;
}
static int compute_rd_thresh_factor(int qindex, vpx_bit_depth_t bit_depth) {
double q;
#if CONFIG_VP9_HIGHBITDEPTH
switch (bit_depth) {
case VPX_BITS_8:
q = vp9_dc_quant(qindex, 0, VPX_BITS_8) / 4.0;
break;
case VPX_BITS_10:
q = vp9_dc_quant(qindex, 0, VPX_BITS_10) / 16.0;
break;
case VPX_BITS_12:
q = vp9_dc_quant(qindex, 0, VPX_BITS_12) / 64.0;
break;
default:
assert(0 && "bit_depth should be VPX_BITS_8, VPX_BITS_10 or VPX_BITS_12");
return -1;
}
#else
(void) bit_depth;
q = vp9_dc_quant(qindex, 0, VPX_BITS_8) / 4.0;
#endif // CONFIG_VP9_HIGHBITDEPTH
// TODO(debargha): Adjust the function below.
return VPXMAX((int)(pow(q, RD_THRESH_POW) * 5.12), 8);
}
