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
|
/* This file is part of the KDE project
* Copyright (C) 2002 Ryan Cumming <bodnar42@phalynx.dhs.org>
*
* 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 version 2.
*
* 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include <config.h>
#include "kfile_wav.h"
#include <kprocess.h>
#include <klocale.h>
#include <kgenericfactory.h>
#include <kstringvalidator.h>
#include <kdebug.h>
#include <tqdict.h>
#include <tqvalidator.h>
#include <tqcstring.h>
#include <tqfile.h>
#include <tqdatetime.h>
#if !defined(__osf__)
#include <inttypes.h>
#else
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
#endif
typedef KGenericFactory<KWavPlugin> WavFactory;
K_EXPORT_COMPONENT_FACTORY(kfile_wav, WavFactory( "kfile_wav" ))
KWavPlugin::KWavPlugin(TQObject *tqparent, const char *name,
const TQStringList &args)
: KFilePlugin(tqparent, name, args)
{
KFileMimeTypeInfo* info = addMimeTypeInfo( "audio/x-wav" );
KFileMimeTypeInfo::GroupInfo* group = 0L;
// "the" group
group = addGroupInfo(info, "Technical", i18n("Technical Details"));
KFileMimeTypeInfo::ItemInfo* item;
item = addItemInfo(group, "Sample Size", i18n("Sample Size"), TQVariant::Int);
setSuffix(item, i18n(" bits"));
item = addItemInfo(group, "Sample Rate", i18n("Sample Rate"), TQVariant::Int);
setSuffix(item, i18n(" Hz"));
item = addItemInfo(group, "Channels", i18n("Channels"), TQVariant::Int);
item = addItemInfo(group, "Length", i18n("Length"), TQVariant::Int);
setAttributes(item, KFileMimeTypeInfo::Cummulative);
setUnit(item, KFileMimeTypeInfo::Seconds);
}
bool KWavPlugin::readInfo( KFileMetaInfo& info, uint /*what*/)
{
if ( info.path().isEmpty() ) // remote file
return false;
TQFile file(info.path());
uint32_t format_size;
uint16_t format_tag;
uint16_t channel_count;
uint32_t sample_rate;
uint32_t bytes_per_second;
uint16_t bytes_per_sample;
uint16_t sample_size;
uint32_t data_size;
uint32_t unknown_chunk_size;
uint16_t unknown_chunk16;
bool have_fmt = false;
bool have_data = false;
TQIODevice::Offset file_length;
const char *riff_signature = "RIFF";
const char *wav_signature = "WAVE";
const char *fmt_signature = "fmt ";
const char *data_signature = "data";
char signature_buffer[4];
if (!file.open(IO_ReadOnly))
{
kdDebug(7034) << "Couldn't open " << TQFile::encodeName(info.path()).data() << endl;
return false;
}
file_length = file.size() - 100; // a bit of insurance
TQDataStream dstream(&file);
// WAV files are little-endian
dstream.setByteOrder(TQDataStream::LittleEndian);
// Read and verify the RIFF signature
dstream.readRawBytes(signature_buffer, 4);
if (memcmp(signature_buffer, riff_signature, 4))
return false;
// Skip the next bit (total file size, pretty useless)
file.at(8);
// Read and verify the WAVE signature
dstream.readRawBytes(signature_buffer, 4);
if (memcmp(signature_buffer, wav_signature, 4))
return false;
// pretty dumb scanner, but better than what we had!
do
{
dstream.readRawBytes(signature_buffer, 4);
if (!memcmp(signature_buffer, fmt_signature, 4)) {
dstream >> format_size;
dstream >> format_tag;
dstream >> channel_count;
dstream >> sample_rate;
dstream >> bytes_per_second;
dstream >> bytes_per_sample;
dstream >> sample_size;
have_fmt = true;
if ( format_size > 16 ) {
for (unsigned int i = 0; i < (format_size-16+1)/2; i++)
dstream >> unknown_chunk16;
}
} else if (!memcmp(signature_buffer, data_signature, 4)) {
dstream >> data_size;
have_data = true;
} else {
dstream >> unknown_chunk_size;
for (unsigned int i = 0; i < (unknown_chunk_size+1)/2; i++)
dstream >> unknown_chunk16;
}
if (have_data && have_fmt)
break;
} while (file.at() < file_length);
if ( (!have_data) || (!have_fmt) )
return false;
// These values are downright illegal
if ((!channel_count) || (!bytes_per_second))
return false;
KFileMetaInfoGroup group = appendGroup(info, "Technical");
appendItem(group, "Sample Size", int(sample_size));
appendItem(group, "Sample Rate", int(sample_rate));
appendItem(group, "Channels", int(channel_count));
unsigned int wav_seconds = data_size / bytes_per_second;
appendItem(group, "Length", int(wav_seconds));
return true;
}
#include "kfile_wav.moc"
|
