1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*
* 21.04.2004 Original verion. davagin@udm.ru.
*-----------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
#include <jni.h>
#include <All.h>
#include <IO.h>
#include "UnBitArrayJMAC.h"
#include "APEDecompressJMAC.h"
#include "NULLIO.h"
CNULLIO m_IO;
/***********************************************************************************
Construction
***********************************************************************************/
CUnBitArrayJMAC::CUnBitArrayJMAC(CAPEDecompressJMAC* decoder, int nVersion) : CUnBitArray(&m_IO, nVersion) {
m_APEDecompress = decoder;
JNIEnv* env = m_APEDecompress->env;
jbyteArray ba = env->NewByteArray(m_nBytes);
if (ba != NULL) {
byteArray = (jbyteArray) env->NewGlobalRef(ba);
env->DeleteLocalRef(ba);
} else
byteArray = NULL;
}
CUnBitArrayJMAC::~CUnBitArrayJMAC() {
if (byteArray != NULL)
m_APEDecompress->env->DeleteGlobalRef(byteArray);
}
int CUnBitArrayJMAC::Seek(int nDistance) {
JNIEnv* env = m_APEDecompress->env;
jclass clazz = env->GetObjectClass(m_APEDecompress->ioObject);
jmethodID method = env->GetMethodID(clazz, "seek", "(J)V");
if (method == NULL) {
if (env->ExceptionOccurred()) {
env->ExceptionDescribe();
env->ExceptionClear();
}
env->DeleteLocalRef(clazz);
return ERROR_IO_READ;
}
env->DeleteLocalRef(clazz);
env->CallVoidMethod(m_APEDecompress->ioObject, method, (jlong) nDistance);
if (env->ExceptionOccurred()) {
env->ExceptionClear();
return ERROR_IO_READ;
}
return ERROR_SUCCESS;
}
int CUnBitArrayJMAC::Read(void* pBuffer, unsigned int nBytesToRead, unsigned int* pBytesRead) {
JNIEnv* env = m_APEDecompress->env;
jclass clazz = env->GetObjectClass(m_APEDecompress->ioObject);
jmethodID method = env->GetMethodID(clazz, "read", "([BII)I");
if (method == NULL) {
if (env->ExceptionOccurred()) {
env->ExceptionDescribe();
env->ExceptionClear();
}
env->DeleteLocalRef(clazz);
return ERROR_IO_READ;
}
env->DeleteLocalRef(clazz);
*pBytesRead = env->CallIntMethod(m_APEDecompress->ioObject, method, byteArray, 0, nBytesToRead);
if (env->ExceptionOccurred()) {
env->ExceptionClear();
return ERROR_IO_READ;
}
void* elements = env->GetPrimitiveArrayCritical(byteArray, NULL);
if (elements == NULL) {
if (env->ExceptionOccurred())
env->ExceptionClear();
return ERROR_IO_READ;
}
memcpy(pBuffer, elements, nBytesToRead);
env->ReleasePrimitiveArrayCritical(byteArray, elements, 0);
return ERROR_SUCCESS;
}
int CUnBitArrayJMAC::FillAndResetBitArray(int nFileLocation, int nNewBitIndex) {
// reset the bit index
m_nCurrentBitIndex = nNewBitIndex;
// seek if necessary
if (nFileLocation != -1) {
if (Seek(nFileLocation) != 0)
return ERROR_IO_READ;
}
// read the new data into the bit array
unsigned int nBytesRead = 0;
if (Read(((unsigned char *) m_pBitArray), m_nBytes, &nBytesRead) != ERROR_SUCCESS)
return ERROR_IO_READ;
return ERROR_SUCCESS;
}
int CUnBitArrayJMAC::FillBitArray() {
// get the bit array index
uint32 nBitArrayIndex = m_nCurrentBitIndex >> 5;
// move the remaining data to the front
memmove((void *) (m_pBitArray), (const void *) (m_pBitArray + nBitArrayIndex), m_nBytes - (nBitArrayIndex * 4));
// read the new data
int nBytesToRead = nBitArrayIndex * 4;
unsigned int nBytesRead = 0;
int nRetVal = Read((unsigned char*) (m_pBitArray + m_nElements - nBitArrayIndex), nBytesToRead, &nBytesRead);
// adjust the m_Bit pointer
m_nCurrentBitIndex = m_nCurrentBitIndex & 31;
// return
return (nRetVal == ERROR_SUCCESS) ? ERROR_SUCCESS : ERROR_IO_READ;
}
|
