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
|
/**
* @file llmediaimplgstreamer_syms.cpp
* @brief dynamic GStreamer symbol-grabbing code
*
* @cond
* $LicenseInfo:firstyear=2007&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
* @endcond
*/
#if LL_GSTREAMER010_ENABLED
#include <string>
extern "C" {
#include <gst/gst.h>
#include "apr_pools.h"
#include "apr_dso.h"
}
#include "llmediaimplgstreamertriviallogging.h"
#define LL_GST_SYM(REQ, GSTSYM, RTN, ...) RTN (*ll##GSTSYM)(__VA_ARGS__) = NULL
#include "llmediaimplgstreamer_syms_raw.inc"
#include "llmediaimplgstreamer_syms_rawv.inc"
#undef LL_GST_SYM
// a couple of stubs for disgusting reasons
GstDebugCategory*
ll_gst_debug_category_new(gchar *name, guint color, gchar *description)
{
static GstDebugCategory dummy;
return &dummy;
}
void ll_gst_debug_register_funcptr(GstDebugFuncPtr func, gchar* ptrname)
{
}
static bool sSymsGrabbed = false;
static apr_pool_t *sSymGSTDSOMemoryPool = NULL;
static apr_dso_handle_t *sSymGSTDSOHandleG = NULL;
static apr_dso_handle_t *sSymGSTDSOHandleV = NULL;
bool grab_gst_syms(std::string gst_dso_name,
std::string gst_dso_name_vid)
{
if (sSymsGrabbed)
{
// already have grabbed good syms
return TRUE;
}
bool sym_error = false;
bool rtn = false;
apr_status_t rv;
apr_dso_handle_t *sSymGSTDSOHandle = NULL;
#define LL_GST_SYM(REQ, GSTSYM, RTN, ...) do{rv = apr_dso_sym((apr_dso_handle_sym_t*)&ll##GSTSYM, sSymGSTDSOHandle, #GSTSYM); if (rv != APR_SUCCESS) {INFOMSG("Failed to grab symbol: %s", #GSTSYM); if (REQ) sym_error = true;} else DEBUGMSG("grabbed symbol: %s from %p", #GSTSYM, (void*)ll##GSTSYM);}while(0)
//attempt to load the shared libraries
apr_pool_create(&sSymGSTDSOMemoryPool, NULL);
if ( APR_SUCCESS == (rv = apr_dso_load(&sSymGSTDSOHandle,
gst_dso_name.c_str(),
sSymGSTDSOMemoryPool) ))
{
INFOMSG("Found DSO: %s", gst_dso_name.c_str());
#include "llmediaimplgstreamer_syms_raw.inc"
if ( sSymGSTDSOHandle )
{
sSymGSTDSOHandleG = sSymGSTDSOHandle;
sSymGSTDSOHandle = NULL;
}
if ( APR_SUCCESS ==
(rv = apr_dso_load(&sSymGSTDSOHandle,
gst_dso_name_vid.c_str(),
sSymGSTDSOMemoryPool) ))
{
INFOMSG("Found DSO: %s", gst_dso_name_vid.c_str());
#include "llmediaimplgstreamer_syms_rawv.inc"
rtn = !sym_error;
}
else
{
INFOMSG("Couldn't load DSO: %s", gst_dso_name_vid.c_str());
rtn = false; // failure
}
}
else
{
INFOMSG("Couldn't load DSO: %s", gst_dso_name.c_str());
rtn = false; // failure
}
if (sym_error)
{
WARNMSG("Failed to find necessary symbols in GStreamer libraries.");
}
if ( sSymGSTDSOHandle )
{
sSymGSTDSOHandleV = sSymGSTDSOHandle;
sSymGSTDSOHandle = NULL;
}
#undef LL_GST_SYM
sSymsGrabbed = !!rtn;
return rtn;
}
void ungrab_gst_syms()
{
// should be safe to call regardless of whether we've
// actually grabbed syms.
if ( sSymGSTDSOHandleG )
{
apr_dso_unload(sSymGSTDSOHandleG);
sSymGSTDSOHandleG = NULL;
}
if ( sSymGSTDSOHandleV )
{
apr_dso_unload(sSymGSTDSOHandleV);
sSymGSTDSOHandleV = NULL;
}
if ( sSymGSTDSOMemoryPool )
{
apr_pool_destroy(sSymGSTDSOMemoryPool);
sSymGSTDSOMemoryPool = NULL;
}
// NULL-out all of the symbols we'd grabbed
#define LL_GST_SYM(REQ, GSTSYM, RTN, ...) do{ll##GSTSYM = NULL;}while(0)
#include "llmediaimplgstreamer_syms_raw.inc"
#include "llmediaimplgstreamer_syms_rawv.inc"
#undef LL_GST_SYM
sSymsGrabbed = false;
}
#endif // LL_GSTREAMER010_ENABLED
|
