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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. 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 www.aomedia.org/license/patent.
*/
#include <assert.h>
#include "aom/aom_integer.h"
#include "aom_ports/mem.h"
#include "aom_dsp/blend.h"
#include "aom_dsp/aom_dsp_common.h"
#include "./aom_dsp_rtcd.h"
// Blending with alpha mask. Mask values come from the range [0, 64],
// as described for AOM_BLEND_A64 in aom_dsp/blend.h. src0 or src1 can
// be the same as dst, or dst can be different from both sources.
void aom_blend_a64_mask_c(uint8_t *dst, uint32_t dst_stride,
const uint8_t *src0, uint32_t src0_stride,
const uint8_t *src1, uint32_t src1_stride,
const uint8_t *mask, uint32_t mask_stride, int h,
int w, int subh, int subw) {
int i, j;
assert(IMPLIES(src0 == dst, src0_stride == dst_stride));
assert(IMPLIES(src1 == dst, src1_stride == dst_stride));
assert(h >= 1);
assert(w >= 1);
assert(IS_POWER_OF_TWO(h));
assert(IS_POWER_OF_TWO(w));
if (subw == 0 && subh == 0) {
for (i = 0; i < h; ++i) {
for (j = 0; j < w; ++j) {
const int m = mask[i * mask_stride + j];
dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j],
src1[i * src1_stride + j]);
}
}
} else if (subw == 1 && subh == 1) {
for (i = 0; i < h; ++i) {
for (j = 0; j < w; ++j) {
const int m = ROUND_POWER_OF_TWO(
mask[(2 * i) * mask_stride + (2 * j)] +
mask[(2 * i + 1) * mask_stride + (2 * j)] +
mask[(2 * i) * mask_stride + (2 * j + 1)] +
mask[(2 * i + 1) * mask_stride + (2 * j + 1)],
2);
dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j],
src1[i * src1_stride + j]);
}
}
} else if (subw == 1 && subh == 0) {
for (i = 0; i < h; ++i) {
for (j = 0; j < w; ++j) {
const int m = AOM_BLEND_AVG(mask[i * mask_stride + (2 * j)],
mask[i * mask_stride + (2 * j + 1)]);
dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j],
src1[i * src1_stride + j]);
}
}
} else {
for (i = 0; i < h; ++i) {
for (j = 0; j < w; ++j) {
const int m = AOM_BLEND_AVG(mask[(2 * i) * mask_stride + j],
mask[(2 * i + 1) * mask_stride + j]);
dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j],
src1[i * src1_stride + j]);
}
}
}
}
#if CONFIG_HIGHBITDEPTH
void aom_highbd_blend_a64_mask_c(uint8_t *dst_8, uint32_t dst_stride,
const uint8_t *src0_8, uint32_t src0_stride,
const uint8_t *src1_8, uint32_t src1_stride,
const uint8_t *mask, uint32_t mask_stride,
int h, int w, int subh, int subw, int bd) {
int i, j;
uint16_t *dst = CONVERT_TO_SHORTPTR(dst_8);
const uint16_t *src0 = CONVERT_TO_SHORTPTR(src0_8);
const uint16_t *src1 = CONVERT_TO_SHORTPTR(src1_8);
(void)bd;
assert(IMPLIES(src0 == dst, src0_stride == dst_stride));
assert(IMPLIES(src1 == dst, src1_stride == dst_stride));
assert(h >= 1);
assert(w >= 1);
assert(IS_POWER_OF_TWO(h));
assert(IS_POWER_OF_TWO(w));
assert(bd == 8 || bd == 10 || bd == 12);
if (subw == 0 && subh == 0) {
for (i = 0; i < h; ++i) {
for (j = 0; j < w; ++j) {
const int m = mask[i * mask_stride + j];
dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j],
src1[i * src1_stride + j]);
}
}
} else if (subw == 1 && subh == 1) {
for (i = 0; i < h; ++i) {
for (j = 0; j < w; ++j) {
const int m = ROUND_POWER_OF_TWO(
mask[(2 * i) * mask_stride + (2 * j)] +
mask[(2 * i + 1) * mask_stride + (2 * j)] +
mask[(2 * i) * mask_stride + (2 * j + 1)] +
mask[(2 * i + 1) * mask_stride + (2 * j + 1)],
2);
dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j],
src1[i * src1_stride + j]);
}
}
} else if (subw == 1 && subh == 0) {
for (i = 0; i < h; ++i) {
for (j = 0; j < w; ++j) {
const int m = AOM_BLEND_AVG(mask[i * mask_stride + (2 * j)],
mask[i * mask_stride + (2 * j + 1)]);
dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j],
src1[i * src1_stride + j]);
}
}
} else {
for (i = 0; i < h; ++i) {
for (j = 0; j < w; ++j) {
const int m = AOM_BLEND_AVG(mask[(2 * i) * mask_stride + j],
mask[(2 * i + 1) * mask_stride + j]);
dst[i * dst_stride + j] = AOM_BLEND_A64(m, src0[i * src0_stride + j],
src1[i * src1_stride + j]);
}
}
}
}
#endif // CONFIG_HIGHBITDEPTH
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