1 /******************************************************************************
2 *
3 * Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 ******************************************************************************/
18 /**
19 *******************************************************************************
20 * @file
21 * ihevcd_itrans_recon_dc.c
22 *
23 * @brief
24 * Contains functions for DC inverse transform and reconstruction
25 *
26 * @author
27 * Ittiam
28 *
29 * @par List of Functions:
30 * - ihevcd_itrans_recon_dc_luma()
31 * - ihevcd_itrans_recon_dc_chroma()
32 *
33 * @remarks
34 * None
35 *
36 *******************************************************************************
37 */
38 /*****************************************************************************/
39 /* File Includes */
40 /*****************************************************************************/
41 #include <stdio.h>
42 #include <stddef.h>
43 #include <stdlib.h>
44 #include <string.h>
45
46 #include "ihevc_typedefs.h"
47 #include "iv.h"
48 #include "ivd.h"
49 #include "ihevcd_cxa.h"
50
51 #include "ihevc_defs.h"
52 #include "ihevc_debug.h"
53 #include "ihevc_structs.h"
54 #include "ihevc_cabac_tables.h"
55 #include "ihevc_macros.h"
56 #include "ihevc_platform_macros.h"
57
58 #include "ihevcd_defs.h"
59 #include "ihevcd_function_selector.h"
60 #include "ihevcd_structs.h"
61 #include "ihevcd_error.h"
62 #include "ihevcd_bitstream.h"
63 #include "ihevc_common_tables.h"
64
65 /* Intra pred includes */
66 #include "ihevc_intra_pred.h"
67
68 /* Inverse transform common module includes */
69 #include "ihevc_trans_tables.h"
70 #include "ihevc_trans_macros.h"
71 #include "ihevc_itrans_recon.h"
72 #include "ihevc_recon.h"
73 #include "ihevc_chroma_itrans_recon.h"
74 #include "ihevc_chroma_recon.h"
75
76 /* Decoder includes */
77 #include "ihevcd_common_tables.h"
78 #include "ihevcd_iquant_itrans_recon_ctb.h"
79 #include "ihevcd_debug.h"
80 #include "ihevcd_profile.h"
81 #include "ihevcd_statistics.h"
82 #include "ihevcd_itrans_recon_dc.h"
83
84
85
ihevcd_itrans_recon_dc_luma(UWORD8 * pu1_pred,UWORD8 * pu1_dst,WORD32 pred_strd,WORD32 dst_strd,WORD32 log2_trans_size,WORD16 i2_coeff_value)86 void ihevcd_itrans_recon_dc_luma(UWORD8 *pu1_pred,
87 UWORD8 *pu1_dst,
88 WORD32 pred_strd,
89 WORD32 dst_strd,
90 WORD32 log2_trans_size,
91 WORD16 i2_coeff_value)
92 {
93 WORD32 row, col;
94 WORD32 add, shift;
95 WORD32 dc_value, quant_out;
96 WORD32 trans_size;
97
98 trans_size = (1 << log2_trans_size);
99
100 quant_out = i2_coeff_value;
101
102 shift = IT_SHIFT_STAGE_1;
103 add = 1 << (shift - 1);
104 dc_value = CLIP_S16((quant_out * 64 + add) >> shift);
105 shift = IT_SHIFT_STAGE_2;
106 add = 1 << (shift - 1);
107 dc_value = CLIP_S16((dc_value * 64 + add) >> shift);
108
109 for(row = 0; row < trans_size; row++)
110 for(col = 0; col < trans_size; col++)
111 pu1_dst[row * dst_strd + col] = CLIP_U8((pu1_pred[row * pred_strd + col] + dc_value));
112
113 }
114
115
ihevcd_itrans_recon_dc_chroma(UWORD8 * pu1_pred,UWORD8 * pu1_dst,WORD32 pred_strd,WORD32 dst_strd,WORD32 log2_trans_size,WORD16 i2_coeff_value)116 void ihevcd_itrans_recon_dc_chroma(UWORD8 *pu1_pred,
117 UWORD8 *pu1_dst,
118 WORD32 pred_strd,
119 WORD32 dst_strd,
120 WORD32 log2_trans_size,
121 WORD16 i2_coeff_value)
122 {
123 WORD32 row, col;
124 WORD32 add, shift;
125 WORD32 dc_value, quant_out;
126 WORD32 trans_size;
127
128
129 trans_size = (1 << log2_trans_size);
130
131 quant_out = i2_coeff_value;
132
133 shift = IT_SHIFT_STAGE_1;
134 add = 1 << (shift - 1);
135 dc_value = CLIP_S16((quant_out * 64 + add) >> shift);
136 shift = IT_SHIFT_STAGE_2;
137 add = 1 << (shift - 1);
138 dc_value = CLIP_S16((dc_value * 64 + add) >> shift);
139
140 for(row = 0; row < trans_size; row++)
141 for(col = 0; col < trans_size; col++)
142 pu1_dst[row * dst_strd + (col << 1)] = CLIP_U8((pu1_pred[row * pred_strd + (col << 1)] + dc_value));
143
144 }
145
146
147