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/*
* Copyright (c) 2010 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_blockd.h"
#include "vp9/decoder/vp9_idct_blk.h"
static void add_constant_residual(const int16_t diff, uint8_t *dest, int stride,
int width, int height) {
int r, c;
for (r = 0; r < height; r++) {
for (c = 0; c < width; c++)
dest[c] = clip_pixel(diff + dest[c]);
dest += stride;
}
}
void vp9_add_constant_residual_8x8_c(const int16_t diff, uint8_t *dest,
int stride) {
add_constant_residual(diff, dest, stride, 8, 8);
}
void vp9_add_constant_residual_16x16_c(const int16_t diff, uint8_t *dest,
int stride) {
add_constant_residual(diff, dest, stride, 16, 16);
}
void vp9_add_constant_residual_32x32_c(const int16_t diff, uint8_t *dest,
int stride) {
add_constant_residual(diff, dest, stride, 32, 32);
}
void vp9_iht_add_c(TX_TYPE tx_type, int16_t *input, uint8_t *dest, int stride,
int eob) {
if (tx_type == DCT_DCT) {
vp9_idct_add(input, dest, stride, eob);
} else {
vp9_short_iht4x4_add(input, dest, stride, tx_type);
vpx_memset(input, 0, 32);
}
}
void vp9_iht_add_8x8_c(TX_TYPE tx_type, int16_t *input, uint8_t *dest,
int stride, int eob) {
if (tx_type == DCT_DCT) {
vp9_idct_add_8x8(input, dest, stride, eob);
} else {
if (eob > 0) {
vp9_short_iht8x8_add(input, dest, stride, tx_type);
vpx_memset(input, 0, 128);
}
}
}
void vp9_idct_add_c(int16_t *input, uint8_t *dest, int stride, int eob) {
if (eob > 1) {
vp9_short_idct4x4_add(input, dest, stride);
vpx_memset(input, 0, 32);
} else {
vp9_short_idct4x4_1_add(input, dest, stride);
((int *)input)[0] = 0;
}
}
void vp9_idct_add_lossless_c(int16_t *input, uint8_t *dest, int stride,
int eob) {
if (eob > 1) {
vp9_short_iwalsh4x4_add(input, dest, stride);
vpx_memset(input, 0, 32);
} else {
vp9_short_iwalsh4x4_1_add_c(input, dest, stride);
((int *)input)[0] = 0;
}
}
void vp9_idct_add_8x8_c(int16_t *input, uint8_t *dest, int stride, int eob) {
// If dc is 1, then input[0] is the reconstructed value, do not need
// dequantization. Also, when dc is 1, dc is counted in eobs, namely eobs >=1.
// The calculation can be simplified if there are not many non-zero dct
// coefficients. Use eobs to decide what to do.
// TODO(yunqingwang): "eobs = 1" case is also handled in vp9_short_idct8x8_c.
// Combine that with code here.
if (eob) {
if (eob == 1) {
// DC only DCT coefficient
vp9_short_idct8x8_1_add(input, dest, stride);
input[0] = 0;
} else if (eob <= 10) {
vp9_short_idct10_8x8_add(input, dest, stride);
vpx_memset(input, 0, 128);
} else {
vp9_short_idct8x8_add(input, dest, stride);
vpx_memset(input, 0, 128);
}
}
}
void vp9_iht_add_16x16_c(TX_TYPE tx_type, int16_t *input, uint8_t *dest,
int stride, int eob) {
if (tx_type == DCT_DCT) {
vp9_idct_add_16x16(input, dest, stride, eob);
} else {
if (eob > 0) {
vp9_short_iht16x16_add(input, dest, stride, tx_type);
vpx_memset(input, 0, 512);
}
}
}
void vp9_idct_add_16x16_c(int16_t *input, uint8_t *dest, int stride, int eob) {
/* The calculation can be simplified if there are not many non-zero dct
* coefficients. Use eobs to separate different cases. */
if (eob) {
if (eob == 1) {
/* DC only DCT coefficient. */
vp9_short_idct16x16_1_add(input, dest, stride);
input[0] = 0;
} else if (eob <= 10) {
vp9_short_idct10_16x16_add(input, dest, stride);
vpx_memset(input, 0, 512);
} else {
vp9_short_idct16x16_add(input, dest, stride);
vpx_memset(input, 0, 512);
}
}
}
void vp9_idct_add_32x32_c(int16_t *input, uint8_t *dest, int stride, int eob) {
DECLARE_ALIGNED_ARRAY(16, int16_t, output, 1024);
if (eob) {
if (eob == 1) {
vp9_short_idct1_32x32(input, output);
vp9_add_constant_residual_32x32(output[0], dest, stride);
input[0] = 0;
} else {
vp9_short_idct32x32_add(input, dest, stride);
vpx_memset(input, 0, 2048);
}
}
}
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