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
|
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "pdispatch.h"
#include "protocol-native-spec.h"
#ifdef DEBUG_OPCODES
static const char *command_names[PA_COMMAND_MAX] = {
[PA_COMMAND_ERROR] = "ERROR",
[PA_COMMAND_TIMEOUT] = "TIMEOUT",
[PA_COMMAND_REPLY] = "REPLY",
[PA_COMMAND_CREATE_PLAYBACK_STREAM] = "CREATE_PLAYBACK_STREAM",
[PA_COMMAND_DELETE_PLAYBACK_STREAM] = "DELETE_PLAYBACK_STREAM",
[PA_COMMAND_CREATE_RECORD_STREAM] = "CREATE_RECORD_STREAM",
[PA_COMMAND_DELETE_RECORD_STREAM] = "DELETE_RECORD_STREAM",
[PA_COMMAND_AUTH] = "AUTH",
[PA_COMMAND_REQUEST] = "REQUEST",
[PA_COMMAND_EXIT] = "EXIT",
[PA_COMMAND_SET_NAME] = "SET_NAME",
[PA_COMMAND_LOOKUP_SINK] = "LOOKUP_SINK",
[PA_COMMAND_LOOKUP_SOURCE] = "LOOKUP_SOURCE",
[PA_COMMAND_DRAIN_PLAYBACK_STREAM] = "DRAIN_PLAYBACK_STREAM",
[PA_COMMAND_PLAYBACK_STREAM_KILLED] = "PLAYBACK_STREAM_KILLED",
[PA_COMMAND_RECORD_STREAM_KILLED] = "RECORD_STREAM_KILLED",
[PA_COMMAND_STAT] = "STAT",
[PA_COMMAND_GET_PLAYBACK_LATENCY] = "PLAYBACK_LATENCY",
};
#endif
struct reply_info {
struct pa_pdispatch *pdispatch;
struct reply_info *next, *previous;
void (*callback)(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
void *userdata;
uint32_t tag;
void *mainloop_timeout;
int callback_is_running;
};
struct pa_pdispatch {
struct pa_mainloop_api *mainloop;
const struct pa_pdispatch_command *command_table;
unsigned n_commands;
struct reply_info *replies;
void (*drain_callback)(struct pa_pdispatch *pd, void *userdata);
void *drain_userdata;
int in_use, shall_free;
};
static void reply_info_free(struct reply_info *r) {
assert(r && r->pdispatch && r->pdispatch->mainloop);
if (r->pdispatch)
r->pdispatch->mainloop->cancel_time(r->pdispatch->mainloop, r->mainloop_timeout);
if (r->previous)
r->previous->next = r->next;
else
r->pdispatch->replies = r->next;
if (r->next)
r->next->previous = r->previous;
free(r);
}
struct pa_pdispatch* pa_pdispatch_new(struct pa_mainloop_api *mainloop, const struct pa_pdispatch_command*table, unsigned entries) {
struct pa_pdispatch *pd;
assert(mainloop);
assert((entries && table) || (!entries && !table));
pd = malloc(sizeof(struct pa_pdispatch));
assert(pd);
pd->mainloop = mainloop;
pd->command_table = table;
pd->n_commands = entries;
pd->replies = NULL;
pd->drain_callback = NULL;
pd->drain_userdata = NULL;
pd->in_use = pd->shall_free = 0;
return pd;
}
void pa_pdispatch_free(struct pa_pdispatch *pd) {
assert(pd);
if (pd->in_use) {
pd->shall_free = 1;
return;
}
while (pd->replies)
reply_info_free(pd->replies);
free(pd);
}
int pa_pdispatch_run(struct pa_pdispatch *pd, struct pa_packet*packet, void *userdata) {
uint32_t tag, command;
struct pa_tagstruct *ts = NULL;
int ret = -1;
assert(pd && packet && packet->data && !pd->in_use);
if (packet->length <= 8)
goto finish;
ts = pa_tagstruct_new(packet->data, packet->length);
assert(ts);
if (pa_tagstruct_getu32(ts, &command) < 0 ||
pa_tagstruct_getu32(ts, &tag) < 0)
goto finish;
#ifdef DEBUG_OPCODES
fprintf(stderr, __FILE__": Recieved opcode <%s>\n", command_names[command]);
#endif
if (command == PA_COMMAND_ERROR || command == PA_COMMAND_REPLY) {
struct reply_info *r;
for (r = pd->replies; r; r = r->next)
if (r->tag == tag)
break;
if (r) {
pd->in_use = r->callback_is_running = 1;
assert(r->callback);
r->callback(r->pdispatch, command, tag, ts, r->userdata);
pd->in_use = r->callback_is_running = 0;
reply_info_free(r);
if (pd->shall_free)
pa_pdispatch_free(pd);
else {
if (pd->drain_callback && !pa_pdispatch_is_pending(pd))
pd->drain_callback(pd, pd->drain_userdata);
}
}
} else if (pd->command_table && command < pd->n_commands) {
const struct pa_pdispatch_command *c = pd->command_table+command;
if (c->proc)
c->proc(pd, command, tag, ts, userdata);
} else
goto finish;
ret = 0;
finish:
if (ts)
pa_tagstruct_free(ts);
return ret;
}
static void timeout_callback(struct pa_mainloop_api*m, void *id, const struct timeval *tv, void *userdata) {
struct reply_info*r = userdata;
assert (r && r->mainloop_timeout == id && r->pdispatch && r->pdispatch->mainloop == m && r->callback);
r->callback(r->pdispatch, PA_COMMAND_TIMEOUT, r->tag, NULL, r->userdata);
reply_info_free(r);
if (r->pdispatch->drain_callback && !pa_pdispatch_is_pending(r->pdispatch))
r->pdispatch->drain_callback(r->pdispatch, r->pdispatch->drain_userdata);
}
void pa_pdispatch_register_reply(struct pa_pdispatch *pd, uint32_t tag, int timeout, void (*cb)(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata), void *userdata) {
struct reply_info *r;
struct timeval tv;
assert(pd && cb);
r = malloc(sizeof(struct reply_info));
assert(r);
r->pdispatch = pd;
r->callback = cb;
r->userdata = userdata;
r->tag = tag;
r->callback_is_running = 0;
gettimeofday(&tv, NULL);
tv.tv_sec += timeout;
r->mainloop_timeout = pd->mainloop->source_time(pd->mainloop, &tv, timeout_callback, r);
assert(r->mainloop_timeout);
r->previous = NULL;
r->next = pd->replies;
if (r->next)
r->next->previous = r;
pd->replies = r;
}
int pa_pdispatch_is_pending(struct pa_pdispatch *pd) {
assert(pd);
return !!pd->replies;
}
void pa_pdispatch_set_drain_callback(struct pa_pdispatch *pd, void (*cb)(struct pa_pdispatch *pd, void *userdata), void *userdata) {
assert(pd);
assert(!cb || pa_pdispatch_is_pending(pd));
pd->drain_callback = cb;
pd->drain_userdata = userdata;
}
void pa_pdispatch_unregister_reply(struct pa_pdispatch *pd, void *userdata) {
struct reply_info *r, *n;
assert(pd);
for (r = pd->replies; r; r = n) {
n = r->next;
if (!r->callback_is_running && r->userdata == userdata) /* when this item's callback is currently running it is destroyed anyway in the very near future */
reply_info_free(r);
}
}
|