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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 "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];
}
}
void vp8_inverse_transform_b(const vp8_idct_rtcd_vtable_t *rtcd, BLOCKD *b, int pitch)
{
if (b->eob > 1)
IDCT_INVOKE(rtcd, idct16)(b->dqcoeff, b->diff, pitch);
else
IDCT_INVOKE(rtcd, idct1)(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 != 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);
}
}
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