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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 #include "vpx_config.h"
12 #include "vp8_rtcd.h"
13 #include "vpx_mem/vpx_mem.h"
14 
15 void vp8_dequant_idct_add_c(short *input, short *dq,
16                             unsigned char *dest, int stride);
17 void vp8_dc_only_idct_add_c(short input_dc, unsigned char * pred,
18                             int pred_stride, unsigned char *dst_ptr,
19                             int dst_stride);
20 
vp8_dequant_idct_add_y_block_c(short * q,short * dq,unsigned char * dst,int stride,char * eobs)21 void vp8_dequant_idct_add_y_block_c
22             (short *q, short *dq,
23              unsigned char *dst, int stride, char *eobs)
24 {
25     int i, j;
26 
27     for (i = 0; i < 4; i++)
28     {
29         for (j = 0; j < 4; j++)
30         {
31             if (*eobs++ > 1)
32                 vp8_dequant_idct_add_c (q, dq, dst, stride);
33             else
34             {
35                 vp8_dc_only_idct_add_c (q[0]*dq[0], dst, stride, dst, stride);
36                 memset(q, 0, 2 * sizeof(q[0]));
37             }
38 
39             q   += 16;
40             dst += 4;
41         }
42 
43         dst += 4*stride - 16;
44     }
45 }
46 
vp8_dequant_idct_add_uv_block_c(short * q,short * dq,unsigned char * dstu,unsigned char * dstv,int stride,char * eobs)47 void vp8_dequant_idct_add_uv_block_c
48             (short *q, short *dq,
49              unsigned char *dstu, unsigned char *dstv, int stride, char *eobs)
50 {
51     int i, j;
52 
53     for (i = 0; i < 2; i++)
54     {
55         for (j = 0; j < 2; j++)
56         {
57             if (*eobs++ > 1)
58                 vp8_dequant_idct_add_c (q, dq, dstu, stride);
59             else
60             {
61                 vp8_dc_only_idct_add_c (q[0]*dq[0], dstu, stride, dstu, stride);
62                 memset(q, 0, 2 * sizeof(q[0]));
63             }
64 
65             q    += 16;
66             dstu += 4;
67         }
68 
69         dstu += 4*stride - 8;
70     }
71 
72     for (i = 0; i < 2; i++)
73     {
74         for (j = 0; j < 2; j++)
75         {
76             if (*eobs++ > 1)
77                 vp8_dequant_idct_add_c (q, dq, dstv, stride);
78             else
79             {
80                 vp8_dc_only_idct_add_c (q[0]*dq[0], dstv, stride, dstv, stride);
81                 memset(q, 0, 2 * sizeof(q[0]));
82             }
83 
84             q    += 16;
85             dstv += 4;
86         }
87 
88         dstv += 4*stride - 8;
89     }
90 }
91