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
|
/*
* Copyright (C) 2003-2011 The Music Player Daemon Project
* http://www.musicpd.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; 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "input_stream.h"
#include "input_registry.h"
#include "input_plugin.h"
#include "input/rewind_input_plugin.h"
#include <glib.h>
#include <assert.h>
static inline GQuark
input_quark(void)
{
return g_quark_from_static_string("input");
}
struct input_stream *
input_stream_open(const char *url, GError **error_r)
{
GError *error = NULL;
assert(error_r == NULL || *error_r == NULL);
for (unsigned i = 0; input_plugins[i] != NULL; ++i) {
const struct input_plugin *plugin = input_plugins[i];
struct input_stream *is;
if (!input_plugins_enabled[i])
continue;
is = plugin->open(url, &error);
if (is != NULL) {
assert(is->plugin != NULL);
assert(is->plugin->close != NULL);
assert(is->plugin->read != NULL);
assert(is->plugin->eof != NULL);
assert(!is->seekable || is->plugin->seek != NULL);
is = input_rewind_open(is);
return is;
} else if (error != NULL) {
g_propagate_error(error_r, error);
return NULL;
}
}
g_set_error(error_r, input_quark(), 0, "Unrecognized URI");
return NULL;
}
bool
input_stream_check(struct input_stream *is, GError **error_r)
{
assert(is != NULL);
assert(is->plugin != NULL);
return is->plugin->check == NULL ||
is->plugin->check(is, error_r);
}
void
input_stream_update(struct input_stream *is)
{
assert(is != NULL);
assert(is->plugin != NULL);
if (is->plugin->update != NULL)
is->plugin->update(is);
}
bool
input_stream_seek(struct input_stream *is, goffset offset, int whence,
GError **error_r)
{
if (is->plugin->seek == NULL)
return false;
return is->plugin->seek(is, offset, whence, error_r);
}
struct tag *
input_stream_tag(struct input_stream *is)
{
assert(is != NULL);
return is->plugin->tag != NULL
? is->plugin->tag(is)
: NULL;
}
size_t
input_stream_read(struct input_stream *is, void *ptr, size_t size,
GError **error_r)
{
assert(ptr != NULL);
assert(size > 0);
return is->plugin->read(is, ptr, size, error_r);
}
void input_stream_close(struct input_stream *is)
{
is->plugin->close(is);
}
bool input_stream_eof(struct input_stream *is)
{
return is->plugin->eof(is);
}
int
input_stream_buffer(struct input_stream *is, GError **error_r)
{
if (is->plugin->buffer == NULL)
return 0;
return is->plugin->buffer(is, error_r);
}
|
