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/*
* Copyright (c) 2010 The VP8 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 "vpx_ports/config.h"
#include "dequantize.h"
#include "predictdc.h"
#include "idct.h"
#include "vpx_mem/vpx_mem.h"
extern void vp8_short_idct4x4llm_c(short *input, short *output, int pitch) ;
extern void vp8_short_idct4x4llm_1_c(short *input, short *output, int pitch);
void vp8_dequantize_b_c(BLOCKD *d)
{
int i;
short *DQ = d->dqcoeff;
short *Q = d->qcoeff;
short *DQC = &d->dequant[0][0];
for (i = 0; i < 16; i++)
{
DQ[i] = Q[i] * DQC[i];
}
}
void vp8_dequant_idct_add_c(short *input, short *dq, unsigned char *pred,
unsigned char *dest, int pitch, int stride)
{
short output[16];
short *diff_ptr = output;
int r, c;
int i;
for (i = 0; i < 16; i++)
{
input[i] = dq[i] * input[i];
}
// the idct halves ( >> 1) the pitch
vp8_short_idct4x4llm_c(input, output, 4 << 1);
vpx_memset(input, 0, 32);
for (r = 0; r < 4; r++)
{
for (c = 0; c < 4; c++)
{
int a = diff_ptr[c] + pred[c];
if (a < 0)
a = 0;
if (a > 255)
a = 255;
dest[c] = (unsigned char) a;
}
dest += stride;
diff_ptr += 4;
pred += pitch;
}
}
void vp8_dequant_dc_idct_add_c(short *input, short *dq, unsigned char *pred,
unsigned char *dest, int pitch, int stride,
int Dc)
{
int i;
short output[16];
short *diff_ptr = output;
int r, c;
input[0] = (short)Dc;
for (i = 1; i < 16; i++)
{
input[i] = dq[i] * input[i];
}
// the idct halves ( >> 1) the pitch
vp8_short_idct4x4llm_c(input, output, 4 << 1);
vpx_memset(input, 0, 32);
for (r = 0; r < 4; r++)
{
for (c = 0; c < 4; c++)
{
int a = diff_ptr[c] + pred[c];
if (a < 0)
a = 0;
if (a > 255)
a = 255;
dest[c] = (unsigned char) a;
}
dest += stride;
diff_ptr += 4;
pred += pitch;
}
}
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