gecko/media/libvpx/vp8/decoder/dequantize.c

62 lines
1.4 KiB
C

/*
* 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_c(short *input, short *dq, short *output, int pitch)
{
int i;
for (i = 0; i < 16; i++)
{
input[i] = dq[i] * input[i];
}
vp8_short_idct4x4llm_c(input, output, pitch);
vpx_memset(input, 0, 32);
}
void vp8_dequant_dc_idct_c(short *input, short *dq, short *output, int pitch, int Dc)
{
int i;
input[0] = (short)Dc;
for (i = 1; i < 16; i++)
{
input[i] = dq[i] * input[i];
}
vp8_short_idct4x4llm_c(input, output, pitch);
vpx_memset(input, 0, 32);
}