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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/*
* probe.c
* Copyright 2009-2013 John Lindgren
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions, and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions, and the following disclaimer in the documentation
* provided with the distribution.
*
* This software is provided "as is" and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising from
* the use of this software.
*/
#include "internal.h"
#include "probe.h"
#include <string.h>
#include "audstrings.h"
#include "i18n.h"
#include "playlist.h"
#include "plugin.h"
#include "plugins-internal.h"
#include "runtime.h"
bool open_input_file (const char * filename, const char * mode,
InputPlugin * ip, VFSFile & file, String * error)
{
/* no need to open a handle for custom URI schemes */
if (ip && ip->input_info.keys[InputKey::Scheme])
return true;
/* already open? */
if (file && file.fseek (0, VFS_SEEK_SET) == 0)
return true;
file = VFSFile (filename, mode);
if (! file && error)
* error = String (file.error ());
return (bool) file;
}
InputPlugin * load_input_plugin (PluginHandle * decoder, String * error)
{
auto ip = (InputPlugin *) aud_plugin_get_header (decoder);
if (! ip && error)
* error = String (_("Error loading plugin"));
return ip;
}
EXPORT PluginHandle * aud_file_find_decoder (const char * filename, bool fast,
VFSFile & file, String * error)
{
AUDINFO ("%s %s.\n", fast ? "Fast-probing" : "Probing", filename);
auto & list = aud_plugin_list (PluginType::Input);
StringBuf scheme = uri_get_scheme (filename);
StringBuf ext = uri_get_extension (filename);
Index<PluginHandle *> ext_matches;
for (PluginHandle * plugin : list)
{
if (! aud_plugin_get_enabled (plugin))
continue;
if (scheme && input_plugin_has_key (plugin, InputKey::Scheme, scheme))
{
AUDINFO ("Matched %s by URI scheme.\n", aud_plugin_get_name (plugin));
return plugin;
}
if (ext && input_plugin_has_key (plugin, InputKey::Ext, ext))
ext_matches.append (plugin);
}
if (ext_matches.len () == 1)
{
AUDINFO ("Matched %s by extension.\n", aud_plugin_get_name (ext_matches[0]));
return ext_matches[0];
}
AUDDBG ("Matched %d plugins by extension.\n", ext_matches.len ());
if (fast && ! ext_matches.len ())
return nullptr;
AUDDBG ("Opening %s.\n", filename);
if (! open_input_file (filename, "r", nullptr, file, error))
{
AUDINFO ("Open failed.\n");
return nullptr;
}
String mime = file.get_metadata ("content-type");
if (mime)
{
for (PluginHandle * plugin : (ext_matches.len () ? ext_matches : list))
{
if (! aud_plugin_get_enabled (plugin))
continue;
if (input_plugin_has_key (plugin, InputKey::MIME, mime))
{
AUDINFO ("Matched %s by MIME type %s.\n",
aud_plugin_get_name (plugin), (const char *) mime);
return plugin;
}
}
}
file.set_limit_to_buffer (true);
for (PluginHandle * plugin : (ext_matches.len () ? ext_matches : list))
{
if (! aud_plugin_get_enabled (plugin))
continue;
AUDINFO ("Trying %s.\n", aud_plugin_get_name (plugin));
auto ip = (InputPlugin *) aud_plugin_get_header (plugin);
if (! ip)
continue;
if (ip->is_our_file (filename, file))
{
AUDINFO ("Matched %s by content.\n", aud_plugin_get_name (plugin));
file.set_limit_to_buffer (false);
return plugin;
}
if (file.fseek (0, VFS_SEEK_SET) != 0)
{
if (error)
* error = String (_("Seek error"));
AUDINFO ("Seek failed.\n");
return nullptr;
}
}
if (error)
* error = String (_("File format not recognized"));
AUDINFO ("No plugins matched.\n");
return nullptr;
}
EXPORT bool aud_file_read_tag (const char * filename, PluginHandle * decoder,
VFSFile & file, Tuple & tuple, Index<char> * image, String * error)
{
auto ip = load_input_plugin (decoder, error);
if (! ip)
return false;
if (! open_input_file (filename, "r", ip, file, error))
return false;
Tuple new_tuple;
new_tuple.set_filename (filename);
if (ip->read_tag (filename, file, new_tuple, image))
{
// cleanly replace existing tuple
new_tuple.set_state (Tuple::Valid);
tuple = std::move (new_tuple);
return true;
}
if (error)
* error = String (_("Error reading metadata"));
return false;
}
EXPORT bool aud_file_can_write_tuple (const char * filename, PluginHandle * decoder)
{
return input_plugin_can_write_tuple (decoder);
}
EXPORT bool aud_file_write_tuple (const char * filename,
PluginHandle * decoder, const Tuple & tuple)
{
auto ip = (InputPlugin *) aud_plugin_get_header (decoder);
if (! ip)
return false;
VFSFile file;
if (! open_input_file (filename, "r+", ip, file))
return false;
bool success = ip->write_tuple (filename, file, tuple);
if (success && file && file.fflush () != 0)
success = false;
if (success)
aud_playlist_rescan_file (filename);
return success;
}
EXPORT bool aud_custom_infowin (const char * filename, PluginHandle * decoder)
{
// blacklist stdin
if (! strncmp (filename, "stdin://", 8))
return false;
auto ip = (InputPlugin *) aud_plugin_get_header (decoder);
if (! ip)
return false;
VFSFile file;
if (! open_input_file (filename, "r", ip, file))
return false;
return ip->file_info_box (filename, file);
}
|
