1/*
2 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11
12#ifndef VP8_COMMON_INVTRANS_H_
13#define VP8_COMMON_INVTRANS_H_
14
15#include "vpx_config.h"
16#include "vp8_rtcd.h"
17#include "blockd.h"
18#include "onyxc_int.h"
19
20#if CONFIG_MULTITHREAD
21#include "vpx_mem/vpx_mem.h"
22#endif
23
24#ifdef __cplusplus
25extern "C" {
26#endif
27
28static void eob_adjust(char *eobs, short *diff)
29{
30    /* eob adjust.... the idct can only skip if both the dc and eob are zero */
31    int js;
32    for(js = 0; js < 16; js++)
33    {
34        if((eobs[js] == 0) && (diff[0] != 0))
35            eobs[js]++;
36        diff+=16;
37    }
38}
39
40static void vp8_inverse_transform_mby(MACROBLOCKD *xd)
41{
42    short *DQC = xd->dequant_y1;
43
44    if (xd->mode_info_context->mbmi.mode != SPLITMV)
45    {
46        /* do 2nd order transform on the dc block */
47        if (xd->eobs[24] > 1)
48        {
49            vp8_short_inv_walsh4x4
50                (&xd->block[24].dqcoeff[0], xd->qcoeff);
51        }
52        else
53        {
54            vp8_short_inv_walsh4x4_1
55                (&xd->block[24].dqcoeff[0], xd->qcoeff);
56        }
57        eob_adjust(xd->eobs, xd->qcoeff);
58
59        DQC = xd->dequant_y1_dc;
60    }
61    vp8_dequant_idct_add_y_block
62                    (xd->qcoeff, DQC,
63                     xd->dst.y_buffer,
64                     xd->dst.y_stride, xd->eobs);
65}
66#ifdef __cplusplus
67}  // extern "C"
68#endif
69
70#endif  // VP8_COMMON_INVTRANS_H_
71