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/*
* Copyright (c) 2021, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 3-Clause Clear License
* and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
* License was not distributed with this source code in the LICENSE file, you
* can obtain it at aomedia.org/license/software-license/bsd-3-c-c/. If the
* Alliance for Open Media Patent License 1.0 was not distributed with this
* source code in the PATENTS file, you can obtain it at
* aomedia.org/license/patent-license/.
*/
#include <stdlib.h>
#include "config/aom_dsp_rtcd.h"
#include "aom_ports/mem.h"
unsigned int aom_highbd_avg_8x8_c(const uint16_t *s, int p) {
int i, j;
int sum = 0;
for (i = 0; i < 8; ++i, s += p)
for (j = 0; j < 8; sum += s[j], ++j) {
}
return (sum + 32) >> 6;
}
unsigned int aom_highbd_avg_4x4_c(const uint16_t *s, int p) {
int i, j;
int sum = 0;
for (i = 0; i < 4; ++i, s += p)
for (j = 0; j < 4; sum += s[j], ++j) {
}
return (sum + 8) >> 4;
}
void aom_highbd_minmax_8x8_c(const uint16_t *s, int p, const uint16_t *d,
int dp, int *min, int *max) {
int i, j;
*min = 255;
*max = 0;
for (i = 0; i < 8; ++i, s += p, d += dp) {
for (j = 0; j < 8; ++j) {
int diff = abs(s[j] - d[j]);
*min = diff < *min ? diff : *min;
*max = diff > *max ? diff : *max;
}
}
}
static void hadamard_highbd_col8_first_pass(const int16_t *src_diff,
ptrdiff_t src_stride,
int16_t *coeff) {
int16_t b0 = src_diff[0 * src_stride] + src_diff[1 * src_stride];
int16_t b1 = src_diff[0 * src_stride] - src_diff[1 * src_stride];
int16_t b2 = src_diff[2 * src_stride] + src_diff[3 * src_stride];
int16_t b3 = src_diff[2 * src_stride] - src_diff[3 * src_stride];
int16_t b4 = src_diff[4 * src_stride] + src_diff[5 * src_stride];
int16_t b5 = src_diff[4 * src_stride] - src_diff[5 * src_stride];
int16_t b6 = src_diff[6 * src_stride] + src_diff[7 * src_stride];
int16_t b7 = src_diff[6 * src_stride] - src_diff[7 * src_stride];
int16_t c0 = b0 + b2;
int16_t c1 = b1 + b3;
int16_t c2 = b0 - b2;
int16_t c3 = b1 - b3;
int16_t c4 = b4 + b6;
int16_t c5 = b5 + b7;
int16_t c6 = b4 - b6;
int16_t c7 = b5 - b7;
coeff[0] = c0 + c4;
coeff[7] = c1 + c5;
coeff[3] = c2 + c6;
coeff[4] = c3 + c7;
coeff[2] = c0 - c4;
coeff[6] = c1 - c5;
coeff[1] = c2 - c6;
coeff[5] = c3 - c7;
}
// src_diff: 16 bit, dynamic range [-32760, 32760]
// coeff: 19 bit
static void hadamard_highbd_col8_second_pass(const int16_t *src_diff,
ptrdiff_t src_stride,
int32_t *coeff) {
int32_t b0 = src_diff[0 * src_stride] + src_diff[1 * src_stride];
int32_t b1 = src_diff[0 * src_stride] - src_diff[1 * src_stride];
int32_t b2 = src_diff[2 * src_stride] + src_diff[3 * src_stride];
int32_t b3 = src_diff[2 * src_stride] - src_diff[3 * src_stride];
int32_t b4 = src_diff[4 * src_stride] + src_diff[5 * src_stride];
int32_t b5 = src_diff[4 * src_stride] - src_diff[5 * src_stride];
int32_t b6 = src_diff[6 * src_stride] + src_diff[7 * src_stride];
int32_t b7 = src_diff[6 * src_stride] - src_diff[7 * src_stride];
int32_t c0 = b0 + b2;
int32_t c1 = b1 + b3;
int32_t c2 = b0 - b2;
int32_t c3 = b1 - b3;
int32_t c4 = b4 + b6;
int32_t c5 = b5 + b7;
int32_t c6 = b4 - b6;
int32_t c7 = b5 - b7;
coeff[0] = c0 + c4;
coeff[7] = c1 + c5;
coeff[3] = c2 + c6;
coeff[4] = c3 + c7;
coeff[2] = c0 - c4;
coeff[6] = c1 - c5;
coeff[1] = c2 - c6;
coeff[5] = c3 - c7;
}
// The order of the output coeff of the hadamard is not important. For
// optimization purposes the final transpose may be skipped.
void aom_highbd_hadamard_8x8_c(const int16_t *src_diff, ptrdiff_t src_stride,
tran_low_t *coeff) {
int idx;
int16_t buffer[64];
int32_t buffer2[64];
int16_t *tmp_buf = &buffer[0];
for (idx = 0; idx < 8; ++idx) {
// src_diff: 13 bit
// buffer: 16 bit, dynamic range [-32760, 32760]
hadamard_highbd_col8_first_pass(src_diff, src_stride, tmp_buf);
tmp_buf += 8;
++src_diff;
}
tmp_buf = &buffer[0];
for (idx = 0; idx < 8; ++idx) {
// buffer: 16 bit
// buffer2: 19 bit, dynamic range [-262080, 262080]
hadamard_highbd_col8_second_pass(tmp_buf, 8, buffer2 + 8 * idx);
++tmp_buf;
}
for (idx = 0; idx < 64; ++idx) coeff[idx] = (tran_low_t)buffer2[idx];
}
// In place 16x16 2D Hadamard transform
void aom_highbd_hadamard_16x16_c(const int16_t *src_diff, ptrdiff_t src_stride,
tran_low_t *coeff) {
int idx;
for (idx = 0; idx < 4; ++idx) {
// src_diff: 13 bit, dynamic range [-4095, 4095]
const int16_t *src_ptr =
src_diff + (idx >> 1) * 8 * src_stride + (idx & 0x01) * 8;
aom_highbd_hadamard_8x8_c(src_ptr, src_stride, coeff + idx * 64);
}
// coeff: 19 bit, dynamic range [-262080, 262080]
for (idx = 0; idx < 64; ++idx) {
tran_low_t a0 = coeff[0];
tran_low_t a1 = coeff[64];
tran_low_t a2 = coeff[128];
tran_low_t a3 = coeff[192];
tran_low_t b0 = (a0 + a1) >> 1;
tran_low_t b1 = (a0 - a1) >> 1;
tran_low_t b2 = (a2 + a3) >> 1;
tran_low_t b3 = (a2 - a3) >> 1;
// new coeff dynamic range: 20 bit
coeff[0] = b0 + b2;
coeff[64] = b1 + b3;
coeff[128] = b0 - b2;
coeff[192] = b1 - b3;
++coeff;
}
}
void aom_highbd_hadamard_32x32_c(const int16_t *src_diff, ptrdiff_t src_stride,
tran_low_t *coeff) {
int idx;
for (idx = 0; idx < 4; ++idx) {
// src_diff: 13 bit, dynamic range [-4095, 4095]
const int16_t *src_ptr =
src_diff + (idx >> 1) * 16 * src_stride + (idx & 0x01) * 16;
aom_highbd_hadamard_16x16_c(src_ptr, src_stride, coeff + idx * 256);
}
// coeff: 20 bit
for (idx = 0; idx < 256; ++idx) {
tran_low_t a0 = coeff[0];
tran_low_t a1 = coeff[256];
tran_low_t a2 = coeff[512];
tran_low_t a3 = coeff[768];
tran_low_t b0 = (a0 + a1) >> 2;
tran_low_t b1 = (a0 - a1) >> 2;
tran_low_t b2 = (a2 + a3) >> 2;
tran_low_t b3 = (a2 - a3) >> 2;
// new coeff dynamic range: 20 bit
coeff[0] = b0 + b2;
coeff[256] = b1 + b3;
coeff[512] = b0 - b2;
coeff[768] = b1 - b3;
++coeff;
}
}
// coeff: 16 bits, dynamic range [-32640, 32640].
// length: value range {16, 64, 256, 1024}.
int aom_satd_c(const tran_low_t *coeff, int length) {
int i;
int satd = 0;
for (i = 0; i < length; ++i) satd += abs(coeff[i]);
// satd: 26 bits, dynamic range [-32640 * 1024, 32640 * 1024]
return satd;
}
int aom_satd_lp_c(const int16_t *coeff, int length) {
int satd = 0;
for (int i = 0; i < length; ++i) satd += abs(coeff[i]);
// satd: 26 bits, dynamic range [-32640 * 1024, 32640 * 1024]
return satd;
}
// bwl: {2, 3, 4, 5}
int aom_vector_var_c(const int16_t *ref, const int16_t *src, const int bwl) {
int i;
int width = 4 << bwl;
int mean = 0, var;
uint32_t sse = 0;
for (i = 0; i < width; ++i) {
int diff = ref[i] - src[i];
mean += diff;
sse += diff * diff;
}
// (mean * mean): dynamic range 32 bits - can be stored in uint32_t
const uint32_t meansq = (uint32_t)abs(mean) * (uint32_t)abs(mean);
var = sse - (int)(meansq >> (bwl + 2));
return var;
}