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/*
* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "./vp9_rtcd.h"
#include "vp9/common/vp9_common.h"
#include "vpx_ports/mem.h"
unsigned int vp9_avg_8x8_c(const uint8_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 vp9_avg_4x4_c(const uint8_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;
}
static void hadamard_col8(const int16_t *src_diff, int 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;
}
void vp9_hadamard_8x8_c(int16_t const *src_diff, int src_stride,
int16_t *coeff) {
int idx;
int16_t buffer[64];
int16_t *tmp_buf = &buffer[0];
for (idx = 0; idx < 8; ++idx) {
hadamard_col8(src_diff, src_stride, tmp_buf);
tmp_buf += 8;
++src_diff;
}
tmp_buf = &buffer[0];
for (idx = 0; idx < 8; ++idx) {
hadamard_col8(tmp_buf, 8, coeff);
coeff += 8;
++tmp_buf;
}
}
// In place 16x16 2D Hadamard transform
void vp9_hadamard_16x16_c(int16_t const *src_diff, int src_stride,
int16_t *coeff) {
int idx;
for (idx = 0; idx < 4; ++idx) {
int16_t const *src_ptr = src_diff + (idx >> 1) * 8 * src_stride
+ (idx & 0x01) * 8;
vp9_hadamard_8x8_c(src_ptr, src_stride, coeff + idx * 64);
}
for (idx = 0; idx < 64; ++idx) {
int16_t a0 = coeff[0];
int16_t a1 = coeff[64];
int16_t a2 = coeff[128];
int16_t a3 = coeff[192];
int16_t b0 = a0 + a1;
int16_t b1 = a0 - a1;
int16_t b2 = a2 + a3;
int16_t b3 = a2 - a3;
coeff[0] = (b0 + b2) >> 1;
coeff[64] = (b1 + b3) >> 1;
coeff[128] = (b0 - b2) >> 1;
coeff[192] = (b1 - b3) >> 1;
++coeff;
}
}
int16_t vp9_satd_c(const int16_t *coeff, int length) {
int i;
int satd = 0;
for (i = 0; i < length; ++i)
satd += abs(coeff[i]);
return (int16_t)satd;
}
// Integer projection onto row vectors.
void vp9_int_pro_row_c(int16_t *hbuf, uint8_t const *ref,
const int ref_stride, const int height) {
int idx;
const int norm_factor = MAX(8, height >> 1);
for (idx = 0; idx < 16; ++idx) {
int i;
hbuf[idx] = 0;
for (i = 0; i < height; ++i)
hbuf[idx] += ref[i * ref_stride];
hbuf[idx] /= norm_factor;
++ref;
}
}
int16_t vp9_int_pro_col_c(uint8_t const *ref, const int width) {
int idx;
int16_t sum = 0;
for (idx = 0; idx < width; ++idx)
sum += ref[idx];
return sum;
}
int vp9_vector_var_c(int16_t const *ref, int16_t const *src,
const int bwl) {
int i;
int width = 4 << bwl;
int sse = 0, mean = 0, var;
for (i = 0; i < width; ++i) {
int diff = ref[i] - src[i];
mean += diff;
sse += diff * diff;
}
var = sse - ((mean * mean) >> (bwl + 2));
return var;
}
void vp9_minmax_8x8_c(const uint8_t *s, int p, const uint8_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;
}
}
}
#if CONFIG_VP9_HIGHBITDEPTH
unsigned int vp9_highbd_avg_8x8_c(const uint8_t *s8, int p) {
int i, j;
int sum = 0;
const uint16_t* s = CONVERT_TO_SHORTPTR(s8);
for (i = 0; i < 8; ++i, s+=p)
for (j = 0; j < 8; sum += s[j], ++j) {}
return (sum + 32) >> 6;
}
unsigned int vp9_highbd_avg_4x4_c(const uint8_t *s8, int p) {
int i, j;
int sum = 0;
const uint16_t* s = CONVERT_TO_SHORTPTR(s8);
for (i = 0; i < 4; ++i, s+=p)
for (j = 0; j < 4; sum += s[j], ++j) {}
return (sum + 8) >> 4;
}
void vp9_highbd_minmax_8x8_c(const uint8_t *s8, int p, const uint8_t *d8,
int dp, int *min, int *max) {
int i, j;
const uint16_t* s = CONVERT_TO_SHORTPTR(s8);
const uint16_t* d = CONVERT_TO_SHORTPTR(d8);
*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;
}
}
}
#endif // CONFIG_VP9_HIGHBITDEPTH
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