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
|
/* GStreamer
*
* Copyright © 2020 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "config.h"
#include <unistd.h>
#include <fcntl.h>
#include <spa/utils/result.h>
#include "gstpipewirecore.h"
/* a list of global cores indexed by fd. */
G_LOCK_DEFINE_STATIC (cores_lock);
static GList *cores;
static void
on_core_error(void *data, uint32_t id, int seq, int res, const char *message)
{
GstPipeWireCore *core = data;
pw_log_warn("error id:%u seq:%d res:%d (%s): %s",
id, seq, res, spa_strerror(res), message);
if (id == PW_ID_CORE) {
core->last_error = res;
}
pw_thread_loop_signal(core->loop, FALSE);
}
static void on_core_done (void *data, uint32_t id, int seq)
{
GstPipeWireCore * core = data;
if (id == PW_ID_CORE) {
core->last_seq = seq;
pw_thread_loop_signal (core->loop, FALSE);
}
}
static const struct pw_core_events core_events = {
PW_VERSION_CORE_EVENTS,
.done = on_core_done,
.error = on_core_error,
};
static GstPipeWireCore *make_core (int fd)
{
GstPipeWireCore *core;
core = g_new (GstPipeWireCore, 1);
core->refcount = 1;
core->fd = fd;
core->loop = pw_thread_loop_new ("pipewire-main-loop", NULL);
core->context = pw_context_new (pw_thread_loop_get_loop(core->loop), NULL, 0);
core->last_seq = -1;
core->last_error = 0;
GST_DEBUG ("loop %p context %p", core->loop, core->context);
if (pw_thread_loop_start (core->loop) < 0)
goto mainloop_failed;
pw_thread_loop_lock (core->loop);
if (fd == -1)
core->core = pw_context_connect (core->context, NULL, 0);
else
core->core = pw_context_connect_fd (core->context, fcntl(fd, F_DUPFD_CLOEXEC, 3), NULL, 0);
if (core->core == NULL)
goto connection_failed;
pw_core_add_listener(core->core,
&core->core_listener,
&core_events,
core);
pw_thread_loop_unlock (core->loop);
return core;
mainloop_failed:
{
GST_ERROR ("error starting mainloop");
pw_context_destroy (core->context);
pw_thread_loop_destroy (core->loop);
g_free (core);
return NULL;
}
connection_failed:
{
GST_ERROR ("error connect: %m");
pw_thread_loop_unlock (core->loop);
pw_context_destroy (core->context);
pw_thread_loop_destroy (core->loop);
g_free (core);
return NULL;
}
}
typedef struct {
int fd;
} FindData;
static gint
core_find (GstPipeWireCore * core, FindData * data)
{
/* fd's must match */
if (core->fd == data->fd)
return 0;
return 1;
}
GstPipeWireCore *gst_pipewire_core_get (int fd)
{
GstPipeWireCore *core;
FindData data;
GList *found;
data.fd = fd;
G_LOCK (cores_lock);
found = g_list_find_custom (cores, &data, (GCompareFunc) core_find);
if (found != NULL) {
core = (GstPipeWireCore *) found->data;
core->refcount++;
GST_DEBUG ("found core %p", core);
} else {
core = make_core(fd);
if (core != NULL) {
GST_DEBUG ("created core %p", core);
/* add to list on success */
cores = g_list_prepend (cores, core);
} else {
GST_WARNING ("could not create core");
}
}
G_UNLOCK (cores_lock);
return core;
}
static void do_sync(GstPipeWireCore * core)
{
struct timespec abstime;
core->pending_seq = pw_core_sync(core->core, 0, core->pending_seq);
pw_thread_loop_get_time (core->loop, &abstime,
GST_PIPEWIRE_DEFAULT_TIMEOUT * SPA_NSEC_PER_SEC);
while (true) {
if (core->last_seq == core->pending_seq || core->last_error < 0)
break;
if (pw_thread_loop_timed_wait_full (core->loop, &abstime) < 0)
break;
}
}
void gst_pipewire_core_release (GstPipeWireCore *core)
{
gboolean zero;
G_LOCK (cores_lock);
core->refcount--;
if ((zero = (core->refcount == 0))) {
GST_DEBUG ("closing core %p", core);
/* remove from list, we can release the mutex after removing the connection
* from the list because after that, nobody can access the connection anymore. */
cores = g_list_remove (cores, core);
}
G_UNLOCK (cores_lock);
if (zero) {
pw_thread_loop_lock (core->loop);
do_sync(core);
pw_core_disconnect (core->core);
pw_thread_loop_unlock (core->loop);
pw_thread_loop_stop (core->loop);
pw_context_destroy (core->context);
pw_thread_loop_destroy (core->loop);
free(core);
}
}
|
