ref: efa9abd02891855afc40670cc874922a5c1fcb1b
dir: /vp8/decoder/dequantize.c/
/*
* 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 "vpx_ports/config.h"
#include "dequantize.h"
#include "vp8/common/idct.h"
#include "vpx_mem/vpx_mem.h"
#include "onyxd_int.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);
#if CONFIG_T8X8
extern void vp8_short_idct8x8_c(short *input, short *output, int pitch);
extern void vp8_short_idct8x8_1_c(short *input, short *output, int pitch);
#endif
#ifdef DEC_DEBUG
extern int dec_debug;
#endif
void vp8_dequantize_b_c(BLOCKD *d)
{
int i;
short *DQ = d->dqcoeff;
short *Q = d->qcoeff;
short *DQC = d->dequant;
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;
}
}
#if CONFIG_T8X8
void vp8_dequantize_b_2x2_c(BLOCKD *d)
{
int i;
short *DQ = d->dqcoeff;
short *Q = d->qcoeff;
short *DQC = d->dequant;
for (i = 0; i < 16; i++)
{
DQ[i] = (short)((Q[i] * DQC[i]));
}
#ifdef DEC_DEBUG
if (dec_debug) {
int j;
printf("Dequantize 2x2\n");
for (j=0;j<16;j++) printf("%d ", Q[j]); printf("\n");
for (j=0;j<16;j++) printf("%d ", DQ[j]); printf("\n");
}
#endif
}
void vp8_dequant_idct_add_8x8_c(short *input, short *dq, unsigned char *pred,
unsigned char *dest, int pitch, int stride)//, MACROBLOCKD *xd, short blk_idx
{
short output[64];
short *diff_ptr = output;
int r, c, b;
int i;
unsigned char *origdest = dest;
unsigned char *origpred = pred;
#ifdef DEC_DEBUG
if (dec_debug) {
int j;
printf("Input 8x8\n");
for (j=0;j<64;j++) {
printf("%d ", input[j]);
if (j%8 == 7) printf("\n");
}
}
#endif
input[0]= input[0] * dq[0];
// recover quantizer for 4 4x4 blocks
for (i = 1; i < 64; i++)
{
input[i]=input[i] * dq[1];
}
#ifdef DEC_DEBUG
if (dec_debug) {
int j;
printf("Input DQ 8x8\n");
for (j=0;j<64;j++) {
printf("%d ", input[j]);
if (j%8 == 7) printf("\n");
}
}
#endif
// the idct halves ( >> 1) the pitch
vp8_short_idct8x8_c(input, output, 16);
#ifdef DEC_DEBUG
if (dec_debug) {
int j;
printf("Output 8x8\n");
for (j=0;j<64;j++) {
printf("%d ", output[j]);
if (j%8 == 7) printf("\n");
}
}
#endif
vpx_memset(input, 0, 128);// test what should i put here
for (b = 0; b < 4; b++)
{
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 += 8;
pred += pitch;
}
diff_ptr = output + (b+1) / 2 * 4 * 8 + (b+1) % 2 * 4;
dest = origdest + (b+1) / 2 * 4 * stride + (b+1) % 2 * 4;
pred = origpred + (b+1) / 2 * 4 * pitch + (b+1) % 2 * 4;
}
#ifdef DEC_DEBUG
if (dec_debug) {
int k,j;
printf("Final 8x8\n");
for (j=0;j<8;j++) {
for (k=0;k<8;k++) {
printf("%d ", origdest[k]);
}
printf("\n");
origdest+=stride;
}
}
#endif
}
void vp8_dequant_dc_idct_add_8x8_c(short *input, short *dq, unsigned char *pred,
unsigned char *dest, int pitch, int stride,
int Dc)// Dc for 1st order T in some rear case
{
short output[64];
short *diff_ptr = output;
int r, c, b;
int i;
unsigned char *origdest = dest;
unsigned char *origpred = pred;
input[0] = (short)Dc;//Dc is the reconstructed value, do not need dequantization
//dc value is recovered after dequantization, since dc need not quantization
#ifdef DEC_DEBUG
if (dec_debug) {
int j;
printf("Input 8x8\n");
for (j=0;j<64;j++) {
printf("%d ", input[j]);
if (j%8 == 7) printf("\n");
}
}
#endif
for (i = 1; i < 64; i++)
{
input[i]=input[i] * dq[1];
}
#ifdef DEC_DEBUG
if (dec_debug) {
int j;
printf("Input DQ 8x8\n");
for (j=0;j<64;j++) {
printf("%d ", input[j]);
if (j%8 == 7) printf("\n");
}
}
#endif
// the idct halves ( >> 1) the pitch
vp8_short_idct8x8_c(input, output,16);
#ifdef DEC_DEBUG
if (dec_debug) {
int j;
printf("Output 8x8\n");
for (j=0;j<64;j++) {
printf("%d ", output[j]);
if (j%8 == 7) printf("\n");
}
}
#endif
vpx_memset(input, 0, 128);
for (b = 0; b < 4; b++)
{
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 += 8;
pred += pitch;
}
diff_ptr = output + (b+1) / 2 * 4 * 8 + (b+1) % 2 * 4;
dest = origdest + (b+1) / 2 * 4 * stride + (b+1) % 2 * 4;
pred = origpred + (b+1) / 2 * 4 * pitch + (b+1) % 2 * 4;
}
#ifdef DEC_DEBUG
if (dec_debug) {
int k,j;
printf("Final 8x8\n");
for (j=0;j<8;j++) {
for (k=0;k<8;k++) {
printf("%d ", origdest[k]);
}
printf("\n");
origdest+=stride;
}
}
#endif
}
#endif