ref: e237fd7c5ad8c0caf341ca50a4ea65495edce74f
dir: /vp8/common/invtrans.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 "invtrans.h"
static void recon_dcblock(MACROBLOCKD *x)
{
BLOCKD *b = &x->block[24];
int i;
for (i = 0; i < 16; i++)
{
x->block[i].dqcoeff[0] = b->diff[i];
}
}
static void recon_dcblock_8x8(MACROBLOCKD *x)
{
BLOCKD *b = &x->block[24]; //for coeff 0, 2, 8, 10
x->block[0].dqcoeff[0] = b->diff[0];
x->block[4].dqcoeff[0] = b->diff[1];
x->block[8].dqcoeff[0] = b->diff[4];
x->block[12].dqcoeff[0] = b->diff[8];
}
void vp8_inverse_transform_b(const vp8_idct_rtcd_vtable_t *rtcd, BLOCKD *b, int pitch)
{
if (b->eob <= 1)
IDCT_INVOKE(rtcd, idct1)(b->dqcoeff, b->diff, pitch);
else
IDCT_INVOKE(rtcd, idct16)(b->dqcoeff, b->diff, pitch);
}
void vp8_inverse_transform_mby(const vp8_idct_rtcd_vtable_t *rtcd, MACROBLOCKD *x)
{
int i;
/* do 2nd order transform on the dc block */
IDCT_INVOKE(rtcd, iwalsh16)(x->block[24].dqcoeff, x->block[24].diff);
recon_dcblock(x);
for (i = 0; i < 16; i++)
{
vp8_inverse_transform_b(rtcd, &x->block[i], 32);
}
}
void vp8_inverse_transform_mbuv(const vp8_idct_rtcd_vtable_t *rtcd, MACROBLOCKD *x)
{
int i;
for (i = 16; i < 24; i++)
{
vp8_inverse_transform_b(rtcd, &x->block[i], 16);
}
}
void vp8_inverse_transform_mb(const vp8_idct_rtcd_vtable_t *rtcd, MACROBLOCKD *x)
{
int i;
if (x->mode_info_context->mbmi.mode != B_PRED &&
x->mode_info_context->mbmi.mode != I8X8_PRED &&
x->mode_info_context->mbmi.mode != SPLITMV)
{
/* do 2nd order transform on the dc block */
IDCT_INVOKE(rtcd, iwalsh16)(&x->block[24].dqcoeff[0], x->block[24].diff);
recon_dcblock(x);
}
for (i = 0; i < 16; i++)
{
vp8_inverse_transform_b(rtcd, &x->block[i], 32);
}
for (i = 16; i < 24; i++)
{
vp8_inverse_transform_b(rtcd, &x->block[i], 16);
}
}
void vp8_inverse_transform_b_8x8(const vp8_idct_rtcd_vtable_t *rtcd, short *input_dqcoeff, short *output_coeff, int pitch)//pay attention to use when 8x8
{
// int b,i;
//if (b->eob > 1)
IDCT_INVOKE(rtcd, idct8)(input_dqcoeff, output_coeff, pitch);
//else
//IDCT_INVOKE(rtcd, idct8_1)(b->dqcoeff, b->diff, pitch);//pitch
}
void vp8_inverse_transform_mby_8x8(const vp8_idct_rtcd_vtable_t *rtcd, MACROBLOCKD *x)
{
int i;
// do 2nd order transform on the dc block
IDCT_INVOKE(rtcd, ihaar2)(x->block[24].dqcoeff, x->block[24].diff, 8);
recon_dcblock_8x8(x); //need to change for 8x8
for (i = 0; i < 9; i += 8)
{
vp8_inverse_transform_b_8x8(rtcd, &x->block[i].dqcoeff[0], &x->block[i].diff[0], 32);
}
for (i = 2; i < 11; i += 8)
{
vp8_inverse_transform_b_8x8(rtcd, &x->block[i+2].dqcoeff[0], &x->block[i].diff[0], 32);
}
}
void vp8_inverse_transform_mbuv_8x8(const vp8_idct_rtcd_vtable_t *rtcd, MACROBLOCKD *x)
{
int i;
for (i = 16; i < 24; i += 4)
{
vp8_inverse_transform_b_8x8(rtcd, &x->block[i].dqcoeff[0], &x->block[i].diff[0], 16);
}
}
void vp8_inverse_transform_mb_8x8(const vp8_idct_rtcd_vtable_t *rtcd, MACROBLOCKD *x)
{
int i;
if (x->mode_info_context->mbmi.mode != B_PRED &&
x->mode_info_context->mbmi.mode != SPLITMV)
{
// do 2nd order transform on the dc block
IDCT_INVOKE(rtcd, ihaar2)(&x->block[24].dqcoeff[0], x->block[24].diff, 8);//dqcoeff[0]
recon_dcblock_8x8(x); //need to change for 8x8
}
for (i = 0; i < 9; i += 8)
{
vp8_inverse_transform_b_8x8(rtcd, &x->block[i].dqcoeff[0], &x->block[i].diff[0], 32);
}
for (i = 2; i < 11; i += 8)
{
vp8_inverse_transform_b_8x8(rtcd, &x->block[i+2].dqcoeff[0], &x->block[i].diff[0], 32);
}
for (i = 16; i < 24; i += 4)
{
vp8_inverse_transform_b_8x8(rtcd, &x->block[i].dqcoeff[0], &x->block[i].diff[0], 16);
}
}