1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17/* ---- includes ----------------------------------------------------------- */
18
19#include "b_BasicEm/Functions.h"
20#include "b_BasicEm/Math.h"
21#include "b_BitFeatureEm/L04Dns2x4Ftr.h"
22
23/* ------------------------------------------------------------------------- */
24
25/* ========================================================================= */
26/*                                                                           */
27/* ---- \ghd{ auxiliary functions } ---------------------------------------- */
28/*                                                                           */
29/* ========================================================================= */
30
31/* ------------------------------------------------------------------------- */
32
33/* ========================================================================= */
34/*                                                                           */
35/* ---- \ghd{ constructor / destructor } ----------------------------------- */
36/*                                                                           */
37/* ========================================================================= */
38
39/* ------------------------------------------------------------------------- */
40
41void bbf_L04Dns2x4Ftr_init( struct bbs_Context* cpA,
42						    struct bbf_L04Dns2x4Ftr* ptrA )
43{
44	bbf_Feature_init( cpA, &ptrA->baseE );
45	ptrA->baseE.typeE = ( uint32 )bbf_FT_L04_DNS_2X4_FTR;
46	ptrA->baseE.vpActivityE = bbf_L04Dns2x4Ftr_activity;
47	bbs_UInt32Arr_init( cpA, &ptrA->dataArrE );
48	ptrA->activityFactorE = 0;
49}
50
51/* ------------------------------------------------------------------------- */
52
53void bbf_L04Dns2x4Ftr_exit( struct bbs_Context* cpA,
54						    struct bbf_L04Dns2x4Ftr* ptrA )
55{
56	bbf_Feature_exit( cpA, &ptrA->baseE );
57	bbs_UInt32Arr_exit( cpA, &ptrA->dataArrE );
58	ptrA->activityFactorE = 0;
59}
60
61/* ------------------------------------------------------------------------- */
62
63/* ========================================================================= */
64/*                                                                           */
65/* ---- \ghd{ operators } -------------------------------------------------- */
66/*                                                                           */
67/* ========================================================================= */
68
69/* ------------------------------------------------------------------------- */
70
71void bbf_L04Dns2x4Ftr_copy( struct bbs_Context* cpA,
72						    struct bbf_L04Dns2x4Ftr* ptrA,
73						    const struct bbf_L04Dns2x4Ftr* srcPtrA )
74{
75	bbf_Feature_copy( cpA, &ptrA->baseE, &srcPtrA->baseE );
76	bbs_UInt32Arr_copy( cpA, &ptrA->dataArrE, &srcPtrA->dataArrE );
77	ptrA->activityFactorE = srcPtrA->activityFactorE;
78}
79
80/* ------------------------------------------------------------------------- */
81
82flag bbf_L04Dns2x4Ftr_equal( struct bbs_Context* cpA,
83						     const struct bbf_L04Dns2x4Ftr* ptrA,
84						     const struct bbf_L04Dns2x4Ftr* srcPtrA )
85{
86	if( !bbf_Feature_equal( cpA, &ptrA->baseE, &srcPtrA->baseE ) ) return FALSE;
87	if( !bbs_UInt32Arr_equal( cpA, &ptrA->dataArrE, &srcPtrA->dataArrE ) ) return FALSE;
88	if( ptrA->activityFactorE != srcPtrA->activityFactorE ) return FALSE;
89	return TRUE;
90}
91
92/* ------------------------------------------------------------------------- */
93
94/* ========================================================================= */
95/*                                                                           */
96/* ---- \ghd{ query functions } -------------------------------------------- */
97/*                                                                           */
98/* ========================================================================= */
99
100/* ------------------------------------------------------------------------- */
101
102/* ========================================================================= */
103/*                                                                           */
104/* ---- \ghd{ modify functions } ------------------------------------------- */
105/*                                                                           */
106/* ========================================================================= */
107
108/* ------------------------------------------------------------------------- */
109
110/* ========================================================================= */
111/*                                                                           */
112/* ---- \ghd{ I/O } -------------------------------------------------------- */
113/*                                                                           */
114/* ========================================================================= */
115
116/* ------------------------------------------------------------------------- */
117
118uint32 bbf_L04Dns2x4Ftr_memSize( struct bbs_Context* cpA,
119							     const struct bbf_L04Dns2x4Ftr* ptrA )
120{
121	uint32 memSizeL = bbs_SIZEOF16( uint32 ) +
122					  bbs_SIZEOF16( uint32 ); /* version */
123
124	memSizeL += bbf_Feature_memSize( cpA, &ptrA->baseE );
125	memSizeL += bbs_UInt32Arr_memSize( cpA, &ptrA->dataArrE );
126	memSizeL += bbs_SIZEOF16( ptrA->activityFactorE );
127
128	return memSizeL;
129}
130
131/* ------------------------------------------------------------------------- */
132
133uint32 bbf_L04Dns2x4Ftr_memWrite( struct bbs_Context* cpA,
134							      const struct bbf_L04Dns2x4Ftr* ptrA,
135								  uint16* memPtrA )
136{
137	uint32 memSizeL = bbf_L04Dns2x4Ftr_memSize( cpA, ptrA );
138	memPtrA += bbs_memWrite32( &memSizeL, memPtrA );
139	memPtrA += bbs_memWriteUInt32( bbf_L04_DNS_2X4_FTR_VERSION, memPtrA );
140	memPtrA += bbf_Feature_memWrite( cpA, &ptrA->baseE, memPtrA );
141	memPtrA += bbs_UInt32Arr_memWrite( cpA, &ptrA->dataArrE, memPtrA );
142	memPtrA += bbs_memWrite32( &ptrA->activityFactorE, memPtrA );
143	return memSizeL;
144}
145
146/* ------------------------------------------------------------------------- */
147
148uint32 bbf_L04Dns2x4Ftr_memRead( struct bbs_Context* cpA,
149							     struct bbf_L04Dns2x4Ftr* ptrA,
150							     const uint16* memPtrA,
151							     struct bbs_MemTbl* mtpA )
152{
153	uint32 memSizeL, versionL;
154	struct bbs_MemTbl memTblL = *mtpA;
155	struct bbs_MemSeg* espL = bbs_MemTbl_fastestSegPtr( cpA, &memTblL, 0 );
156	if( bbs_Context_error( cpA ) ) return 0;
157	memPtrA += bbs_memRead32( &memSizeL, memPtrA );
158	memPtrA += bbs_memReadVersion32( cpA, &versionL, bbf_L04_DNS_2X4_FTR_VERSION, memPtrA );
159	memPtrA += bbf_Feature_memRead( cpA, &ptrA->baseE, memPtrA );
160	memPtrA += bbs_UInt32Arr_memRead( cpA, &ptrA->dataArrE, memPtrA, espL );
161	memPtrA += bbs_memRead32( &ptrA->activityFactorE, memPtrA );
162	if( memSizeL != bbf_L04Dns2x4Ftr_memSize( cpA, ptrA ) )
163	{
164		bbs_ERR0( bbs_ERR_CORRUPT_DATA, "uint32 bbf_L04Dns2x4Ftr_memRead( struct bem_ScanGradientMove* ptrA, const uint16* memPtrA ):\n"
165			        "size mismatch" );
166		return 0;
167	}
168
169	return memSizeL;
170}
171
172/* ------------------------------------------------------------------------- */
173
174/* ========================================================================= */
175/*                                                                           */
176/* ---- \ghd{ exec functions } --------------------------------------------- */
177/*                                                                           */
178/* ========================================================================= */
179
180/* ------------------------------------------------------------------------- */
181
182int32 bbf_L04Dns2x4Ftr_activity( const struct bbf_Feature* ptrA, const uint32* patchA )
183{
184	const struct bbf_L04Dns2x4Ftr* ptrL = ( struct bbf_L04Dns2x4Ftr* )ptrA;
185
186	uint32 wL = ptrL->baseE.patchWidthE - 1;
187    uint32 hL = ptrL->baseE.patchHeightE - 3;
188
189	const uint32* dataPtrL = ptrL->dataArrE.arrPtrE;
190
191	uint32 iL;
192
193	uint32 borderMaskL = ( ( uint32 )1 << hL ) - 1;
194
195	uint32 sL[ 8 ];
196	uint32 mL[ 4 ];
197	uint32 bL[ 4 ] = { 0, 0, 0, 0 }; /* bit sum */
198
199	for( iL = 0; iL < wL; iL++ )
200	{
201		uint32 s1L = patchA[ iL     ];
202		uint32 s2L = patchA[ iL + 1 ];
203
204		/* comparison of pixels with patchHeightE - 3 features */
205		sL[ 0 ] = ( ( s1L      ) ^ dataPtrL[ 0 ] ) & borderMaskL;
206		sL[ 1 ] = ( ( s1L >> 1 ) ^ dataPtrL[ 1 ] ) & borderMaskL;
207		sL[ 2 ] = ( ( s1L >> 2 ) ^ dataPtrL[ 2 ] ) & borderMaskL;
208		sL[ 3 ] = ( ( s1L >> 3 ) ^ dataPtrL[ 3 ] ) & borderMaskL;
209
210		sL[ 4 ] = ( ( s2L      ) ^ dataPtrL[ 4 ] ) & borderMaskL;
211		sL[ 5 ] = ( ( s2L >> 1 ) ^ dataPtrL[ 5 ] ) & borderMaskL;
212		sL[ 6 ] = ( ( s2L >> 2 ) ^ dataPtrL[ 6 ] ) & borderMaskL;
213		sL[ 7 ] = ( ( s2L >> 3 ) ^ dataPtrL[ 7 ] ) & borderMaskL;
214
215		/* parallel bit counting of patchHeightE - 3 features */
216		mL[ 0 ] = ( ( sL[ 0 ] & 0x11111111 ) + ( sL[ 1 ] & 0x11111111 ) +
217					( sL[ 2 ] & 0x11111111 ) + ( sL[ 3 ] & 0x11111111 ) +
218				    ( sL[ 4 ] & 0x11111111 ) + ( sL[ 5 ] & 0x11111111 ) +
219					( sL[ 6 ] & 0x11111111 ) + ( sL[ 7 ] & 0x11111111 ) );
220
221		mL[ 1 ] = ( ( sL[ 0 ] & 0x22222222 ) + ( sL[ 1 ] & 0x22222222 ) +
222					( sL[ 2 ] & 0x22222222 ) + ( sL[ 3 ] & 0x22222222 ) +
223				    ( sL[ 4 ] & 0x22222222 ) + ( sL[ 5 ] & 0x22222222 ) +
224					( sL[ 6 ] & 0x22222222 ) + ( sL[ 7 ] & 0x22222222 ) ) >> 1;
225
226		mL[ 2 ] = ( ( sL[ 0 ] & 0x44444444 ) + ( sL[ 1 ] & 0x44444444 ) +
227					( sL[ 2 ] & 0x44444444 ) + ( sL[ 3 ] & 0x44444444 ) +
228				    ( sL[ 4 ] & 0x44444444 ) + ( sL[ 5 ] & 0x44444444 ) +
229					( sL[ 6 ] & 0x44444444 ) + ( sL[ 7 ] & 0x44444444 ) ) >> 2;
230
231		mL[ 3 ] = ( ( sL[ 0 ] & 0x88888888 ) + ( sL[ 1 ] & 0x88888888 ) +
232					( sL[ 2 ] & 0x88888888 ) + ( sL[ 3 ] & 0x88888888 ) +
233				    ( sL[ 4 ] & 0x88888888 ) + ( sL[ 5 ] & 0x88888888 ) +
234					( sL[ 6 ] & 0x88888888 ) + ( sL[ 7 ] & 0x88888888 ) ) >> 3;
235
236		/* parallel comparison with thresholds and packing of results into bit array of size patchHeightE - 3 */
237		{
238			uint32 vL = 0;
239			vL |= ( ( mL[ 0 ] + dataPtrL[  8 ] ) & 0x88888888 ) >> 3;
240			vL |= ( ( mL[ 1 ] + dataPtrL[  9 ] ) & 0x88888888 ) >> 2;
241			vL |= ( ( mL[ 2 ] + dataPtrL[ 10 ] ) & 0x88888888 ) >> 1;
242			vL |= ( ( mL[ 3 ] + dataPtrL[ 11 ] ) & 0x88888888 );
243
244			vL = ( ~vL ) & 0x1FFFFFFF;
245
246			/* mask out and count bits */
247			{
248				uint32 vmL;
249				vmL = vL & dataPtrL[ 12 ];
250				bL[ 0 ] += bbf_BIT_SUM_32( vmL );
251				vmL = vL & dataPtrL[ 13 ];
252				bL[ 1 ] += bbf_BIT_SUM_32( vmL);
253				vmL = vL & dataPtrL[ 14 ];
254				bL[ 2 ] += bbf_BIT_SUM_32( vmL );
255				vmL = vL & dataPtrL[ 15 ];
256				bL[ 3 ] += bbf_BIT_SUM_32( vmL );
257			}
258
259			dataPtrL += 16;
260		}
261	}
262
263	/* compute final activity */
264	{
265		uint32 actL = ( ( bL[ 0 ] << 3 ) + ( bL[ 1 ] << 2 ) + ( bL[ 2 ] << 1 ) + bL[ 3 ] );
266		return actL * ptrL->activityFactorE;
267	}
268}
269
270/* ------------------------------------------------------------------------- */
271
272/* ========================================================================= */
273
274