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
25 extern "C" {
26 #endif
27 
eob_adjust(char * eobs,short * diff)28 static 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 
vp8_inverse_transform_mby(MACROBLOCKD * xd)40 static 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