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 : #include "blockd.h"
13 :
14 : typedef enum
15 : {
16 : PRED = 0,
17 : DEST = 1
18 : } BLOCKSET;
19 :
20 0 : static void setup_block
21 : (
22 : BLOCKD *b,
23 : int mv_stride,
24 : unsigned char **base,
25 : int Stride,
26 : int offset,
27 : BLOCKSET bs
28 : )
29 : {
30 :
31 0 : if (bs == DEST)
32 : {
33 0 : b->dst_stride = Stride;
34 0 : b->dst = offset;
35 0 : b->base_dst = base;
36 : }
37 : else
38 : {
39 0 : b->pre_stride = Stride;
40 0 : b->pre = offset;
41 0 : b->base_pre = base;
42 : }
43 :
44 0 : }
45 :
46 :
47 0 : static void setup_macroblock(MACROBLOCKD *x, BLOCKSET bs)
48 : {
49 : int block;
50 :
51 : unsigned char **y, **u, **v;
52 :
53 0 : if (bs == DEST)
54 : {
55 0 : y = &x->dst.y_buffer;
56 0 : u = &x->dst.u_buffer;
57 0 : v = &x->dst.v_buffer;
58 : }
59 : else
60 : {
61 0 : y = &x->pre.y_buffer;
62 0 : u = &x->pre.u_buffer;
63 0 : v = &x->pre.v_buffer;
64 : }
65 :
66 0 : for (block = 0; block < 16; block++) /* y blocks */
67 : {
68 0 : setup_block(&x->block[block], x->dst.y_stride, y, x->dst.y_stride,
69 0 : (block >> 2) * 4 * x->dst.y_stride + (block & 3) * 4, bs);
70 : }
71 :
72 0 : for (block = 16; block < 20; block++) /* U and V blocks */
73 : {
74 0 : setup_block(&x->block[block], x->dst.uv_stride, u, x->dst.uv_stride,
75 0 : ((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4, bs);
76 :
77 0 : setup_block(&x->block[block+4], x->dst.uv_stride, v, x->dst.uv_stride,
78 0 : ((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4, bs);
79 : }
80 0 : }
81 :
82 0 : void vp8_setup_block_dptrs(MACROBLOCKD *x)
83 : {
84 : int r, c;
85 :
86 0 : for (r = 0; r < 4; r++)
87 : {
88 0 : for (c = 0; c < 4; c++)
89 : {
90 0 : x->block[r*4+c].diff = &x->diff[r * 4 * 16 + c * 4];
91 0 : x->block[r*4+c].predictor = x->predictor + r * 4 * 16 + c * 4;
92 : }
93 : }
94 :
95 0 : for (r = 0; r < 2; r++)
96 : {
97 0 : for (c = 0; c < 2; c++)
98 : {
99 0 : x->block[16+r*2+c].diff = &x->diff[256 + r * 4 * 8 + c * 4];
100 0 : x->block[16+r*2+c].predictor = x->predictor + 256 + r * 4 * 8 + c * 4;
101 :
102 : }
103 : }
104 :
105 0 : for (r = 0; r < 2; r++)
106 : {
107 0 : for (c = 0; c < 2; c++)
108 : {
109 0 : x->block[20+r*2+c].diff = &x->diff[320+ r * 4 * 8 + c * 4];
110 0 : x->block[20+r*2+c].predictor = x->predictor + 320 + r * 4 * 8 + c * 4;
111 :
112 : }
113 : }
114 :
115 0 : x->block[24].diff = &x->diff[384];
116 :
117 0 : for (r = 0; r < 25; r++)
118 : {
119 0 : x->block[r].qcoeff = x->qcoeff + r * 16;
120 0 : x->block[r].dqcoeff = x->dqcoeff + r * 16;
121 : }
122 0 : }
123 :
124 0 : void vp8_build_block_doffsets(MACROBLOCKD *x)
125 : {
126 :
127 : /* handle the destination pitch features */
128 0 : setup_macroblock(x, DEST);
129 0 : setup_macroblock(x, PRED);
130 0 : }
|