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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "cdreader.h"
#include "Exceptions.h"
#include "generic.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#define _(x) x
#endif
#include "cdabstract.h"
bool cdreader::CanWrite() const {
return 0;
}
bool cdreader::CanRead() const {
return 1;
}
bool cdreader::CanSeek() const {
return 1;
}
String cdreader::GetName() const {
return n + " raw reading";
}
ssize_t cdreader::GetSize() const {
return -1;
}
off_t cdreader::seek(off_t offset, int whence) throw (GeneralException) {
switch (whence) {
case SEEK_SET:
itell = offset;
break;
case SEEK_CUR:
itell += offset;
break;
case SEEK_END:
throw GeneralException("Can not yet seek from the end of a CD.");
}
return itell;
}
ssize_t cdreader::read(void *buf, size_t count) throw (GeneralException) {
char sector[2352];
size_t r = count;
size_t remain = itell % 2352;
sectorseek(itell / 2352);
while (count > 0) {
size_t n = MIN(2352 - remain, count);
getsector(sector);
bcopy(sector + remain, buf, n);
buf = ((char *) buf) + n;
itell += n;
count -= n;
remain = 0;
}
return r;
}
void cdreader::sectorseek(int sec) {
sector = sec;
}
#ifdef __linux__
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/cdrom.h>
cdreader::cdreader(const String & no) throw (GeneralException) :
Handle(open(no.to_charp(), O_RDONLY)), n(no), sector(0) {
#ifdef DEBUG
printm(M_ERROR, "Opening cdrom device " + no + "\n");
#endif
if (GetHandle() < 0) {
throw IOGeneral(String(_("Error opening file ")) + no + _(" for reading: ") + strerror(errno));
}
struct stat s;
fstat(GetHandle(), &s);
if (!S_ISBLK(s.st_mode)) {
throw GeneralException(no + " is not a block device.");
}
}
cdreader::cdreader(const cdreader & i) : Handle(i), n(i.n) {
}
void cdreader::getsector(void *buf, int sec) throw (GeneralException) {
struct cdrom_msf * msf = (struct cdrom_msf *) buf;
if (sec >= 0)
sector = sec;
sector += 150;
msf->cdmsf_min0 = sector /CD_SECS /CD_FRAMES;
msf->cdmsf_sec0 = (sector /CD_FRAMES)%CD_SECS;
msf->cdmsf_frame0= sector %CD_FRAMES;
msf->cdmsf_min1 = (sector+1)/CD_SECS /CD_FRAMES;
msf->cdmsf_sec1 = ((sector+1)/CD_FRAMES)%CD_SECS;
msf->cdmsf_frame1= (sector+1)%CD_FRAMES;
sector -= 150;
if (ioctl(GetHandle(), CDROMREADRAW, buf) < 0) {
throw GeneralException(String("unable to read cd sector ") + sector + ": " + strerror(errno));
}
sector++;
}
#endif
#if defined (_MSC_VER) || defined (__MINGW32__)
cdreader::cdreader(const String & no) throw (GeneralException) :
Handle(-1), n(no), sector(0) {
if (!(hFile = cdabstract::OpenIOCTLFile(no[0])))
throw GeneralException("Error opening device " + no);
}
cdreader::cdreader(const cdreader & i) : Handle(i), n(i.n) {
hFile = i.hFile;
}
void cdreader::close() throw (GeneralException) {
CloseHandle(hFile);
}
typedef enum _TRACK_MODE_TYPE {
YellowMode2,
XAForm2,
CDDA
} TRACK_MODE_TYPE, *PTRACK_MODE_TYPE;
typedef struct _RAW_READ_INFO {
LARGE_INTEGER DiskOffset;
ULONG SectorCount;
TRACK_MODE_TYPE TrackMode;
} RAW_READ_INFO, *PRAW_READ_INFO;
void cdreader::getsector(void *buf, int sec) throw (GeneralException) {
RAW_READ_INFO rawIOCTL;
DWORD dwRet;
BOOL bStat;
bool done = false;
if (sec >= 0)
sector = sec;
rawIOCTL.DiskOffset.QuadPart = sector * 2048;
rawIOCTL.SectorCount = 1;
rawIOCTL.TrackMode = YellowMode2;
while (!done) {
SetLastError(0);
bStat = DeviceIoControl(hFile, IOCTL_CDROM_RAW_READ,
&rawIOCTL, sizeof(RAW_READ_INFO),
buf, 2352, &dwRet, NULL);
if (!bStat) {
DWORD dwErrCode = GetLastError();
if (dwErrCode == ERROR_INVALID_FUNCTION) {
if (rawIOCTL.TrackMode == YellowMode2) {
rawIOCTL.TrackMode = XAForm2;
continue;
}
}
if (dwErrCode != ERROR_IO_PENDING) {
LPVOID lpMsgBuf;
if (!FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf, 0, NULL ))
throw GeneralException("Gave up on reading CD: unknown error");
String errmsg = (LPCTSTR) lpMsgBuf;
LocalFree(lpMsgBuf);
throw GeneralException("Gave up on reading CD: " + errmsg);
}
} else {
done = true;
}
}
}
#endif
|
