aboutsummaryrefslogtreecommitdiff
path: root/src/pulseaudio-mgr.c
blob: 747f59b932dd53715c0e76e11f93d94e06accc3e (plain)
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
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
/*
Copyright 2011 Canonical Ltd.

Authors:
    Conor Curran <conor.curran@canonical.com>

This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License version 3, as published
by the Free Software Foundation.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranties of
MERCHANTABILITY, SATISFACTORY QUALITY, 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, see <http://www.gnu.org/licenses/>.
*/

/**Notes
 *
 * Approach now is to set up the communication channels, query the server
 * fetch its default sink/source. If this fails then fetch the list of sinks/sources
 * and take the first one which is not the auto-null sink.
 * TODO: need to handle the situation where one chink in this linear chain breaks
 * i.e. start off the process again and count the attempts (note different to
                                                            reconnect attempts)
 */
#include <pulse/gccmacro.h>
#include <pulse/glib-mainloop.h>
#include <pulse/error.h>

#include "pulseaudio-mgr.h"
#include "config.h"

#define RECONNECT_DELAY 5


static void pm_context_state_callback(pa_context *c, void *userdata);
static void pm_subscribed_events_callback (pa_context *c,
                                           enum pa_subscription_event_type t,
                                           uint32_t index,
                                           void* userdata);
static void pm_server_info_callback (pa_context *c,
                                     const pa_server_info *info,
                                     void *userdata);
static void pm_default_sink_info_callback (pa_context *c,
                                           const pa_sink_info *info,
                                           int eol,
                                           void *userdata);
static void pm_default_source_info_callback (pa_context *c,
                                             const pa_source_info *info,
                                             int eol,
                                             void *userdata);
static void pm_sink_info_callback (pa_context *c,
                                   const pa_sink_info *sink,
                                   int eol,
                                   void *userdata);
static void pm_source_info_callback (pa_context *c,
                                     const pa_source_info *info,
                                     int eol,
                                     void *userdata);
static void pm_update_source_info_callback (pa_context *c,
                                            const pa_source_info *info,
                                            int eol,
                                            void *userdata);
static void pm_sink_input_info_callback (pa_context *c,
                                         const pa_sink_input_info *info,
                                         int eol,
                                         void *userdata);
static void pm_update_device (pa_context *c,
                                   const pa_sink_info *info,
                                   int eol,
                                   void *userdata);
static void pm_toggle_mute_for_every_sink_callback (pa_context *c,
                                                    const pa_sink_info *sink,
                                                    int eol,
                                                    void* userdata);
static void pm_source_output_info_callback (pa_context *c,
                                            const pa_source_output_info *info,
                                            int eol,
                                            void *userdata);

static gboolean reconnect_to_pulse (gpointer user_data);

static gint connection_attempts = 0;
static gint reconnect_idle_id = 0;
static pa_context *pulse_context = NULL;
static pa_glib_mainloop *pa_main_loop = NULL;

/**
 Entry Point
 **/
void 
pm_establish_pulse_connection (Device* device)
{
  pa_main_loop = pa_glib_mainloop_new (g_main_context_default ());
  g_assert (pa_main_loop);
  reconnect_to_pulse ((gpointer)device);
}

/**
close_pulse_activites()
Gracefully close our connection with the Pulse async library.
**/
void close_pulse_activites()
{
  if (pulse_context != NULL) {
    pa_context_unref(pulse_context);
    pulse_context = NULL;
  }
  pa_glib_mainloop_free(pa_main_loop);
  pa_main_loop = NULL;
}

/**
reconnect_to_pulse (gpointer user_data)
Method which connects to the pulse server and is used to track reconnects.
 */
static gboolean
reconnect_to_pulse (gpointer user_data)
{
  g_debug("Attempt a pulse connection");
  g_return_val_if_fail (IS_DEVICE (user_data), FALSE);

  connection_attempts += 1;
  if (pulse_context != NULL) {
    pa_context_unref(pulse_context);
    pulse_context = NULL;
  }

  pa_proplist     *proplist;

  proplist = pa_proplist_new ();
  pa_proplist_sets (proplist,
                    PA_PROP_APPLICATION_NAME,
                    "Indicator Sound");
  pa_proplist_sets (proplist,
                    PA_PROP_APPLICATION_ID,
                    "com.canonical.indicator.sound");
  pa_proplist_sets (proplist,
                    PA_PROP_APPLICATION_ICON_NAME,
                    "multimedia-volume-control");
  pa_proplist_sets (proplist,
                    PA_PROP_APPLICATION_VERSION,
                    PACKAGE_VERSION);

  pulse_context = pa_context_new_with_proplist (pa_glib_mainloop_get_api( pa_main_loop ),
                                                NULL,
                                                proplist);
  pa_proplist_free (proplist);
  g_assert(pulse_context);
  pa_context_set_state_callback (pulse_context,
                                 pm_context_state_callback,
                                 user_data);
  int result = pa_context_connect (pulse_context,
                                   NULL,
                                   (pa_context_flags_t)PA_CONTEXT_NOFAIL,
                                   NULL);

  if (result < 0) {
    g_warning ("Failed to connect context: %s",
               pa_strerror (pa_context_errno (pulse_context)));
  }
  if (connection_attempts > 5){
    return FALSE;
  }
  else{
    return TRUE;
  }
}

void
pm_update_volume (gint sink_index, pa_cvolume new_volume)
{
  if (sink_index < 0 || pulse_context == NULL){
    g_warning ("pm_update_volume sink index is negative or the context is null");    
    return;
  }
  
  if (pa_context_get_state (pulse_context) != PA_CONTEXT_READY ){
    g_warning ("pm_update_volume context is not in a ready state");    
    return;    
  }

  pa_operation *operation = NULL;
  
  operation = pa_context_set_sink_volume_by_index (pulse_context,
                                                   sink_index,
                                                   &new_volume,
                                                   NULL,
                                                   NULL);
  if (!operation){
    g_warning ("pm_update_volume operation failed for some reason");
    return;
  }                                                    
  pa_operation_unref (operation);
}

void
pm_update_mute (gboolean update)
{
  if (pulse_context == NULL){
    g_warning ("pm_update_mute - the context is null");    
    return;
  }

  if (pa_context_get_state (pulse_context) != PA_CONTEXT_READY ){
    g_warning ("pm_update_mute context is not in a ready state");    
    return;    
  }

  pa_operation *operation = NULL;
  
  operation =  pa_context_get_sink_info_list (pulse_context,
                                              pm_toggle_mute_for_every_sink_callback,
                                              GINT_TO_POINTER (update));
  if (!operation){
    g_warning ("pm_update_mute operation failed for some reason");
    return;
  }
  pa_operation_unref (operation);
}

void
pm_update_mic_gain (gint source_index, pa_cvolume new_gain)
{
  if (source_index < 0 || pulse_context == NULL){
    g_warning ("pm_update_mic_gain source index is negative or the context is null");        
    return;
  }  

  if (pa_context_get_state (pulse_context) != PA_CONTEXT_READY ){
    g_warning ("pm_update_mic_gain context is not in a ready state");    
    return;    
  }
  
  pa_operation *operation = NULL;
  
  operation = pa_context_set_source_volume_by_index (pulse_context,
                                                     source_index,
                                                     &new_gain,
                                                     NULL,
                                                     NULL);
  if (!operation){
    g_warning ("pm_update_mic_gain operation failed for some reason");
    return;
  }
  pa_operation_unref (operation);                                                     
}

void
pm_update_mic_mute (gint source_index, gint mute_update)
{
  if (source_index < 0){
    return;
  }

  if (pa_context_get_state (pulse_context) != PA_CONTEXT_READY ){
    g_warning ("pm_update_mic_mute context is not in a ready state");    
    return;    
  }

  pa_operation *operation = NULL;

  operation = pa_context_set_source_mute_by_index (pulse_context,
                                                   source_index,
                                                   mute_update,
                                                   NULL,
                                                   NULL);
  if (!operation){
    g_warning ("pm_update_mic_mute operation failed for some reason");
    return;
  }
  pa_operation_unref (operation);                                                   
}

/**********************************************************************************************************************/
//    Pulse-Audio asychronous call-backs
/**********************************************************************************************************************/


static void 
pm_subscribed_events_callback (pa_context *c,
                               enum pa_subscription_event_type t,
                               uint32_t index,
                               void* userdata)
{
  if (IS_DEVICE (userdata) == FALSE){
    g_critical ("subscribed events callback - our userdata is not what we think it should be");
    return;
  }
  Device* sink = DEVICE (userdata);

  switch (t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) {
  case PA_SUBSCRIPTION_EVENT_SINK:
    
    // We don't care about any other sink other than the active one.
    if (index != device_get_sink_index (sink))
      return;
      
    if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_REMOVE) {
      device_sink_deactivated (sink);
      
    }
    else{
      pa_operation_unref (pa_context_get_sink_info_by_index (c,
                                                             index,
                                                             pm_update_device,
                                                             userdata) );
    }
    break;
  case PA_SUBSCRIPTION_EVENT_SOURCE:
    g_debug ("Looks like source event of some description - index = %i", index);
    // We don't care about any other sink other than the active one.
    if (index != device_get_source_index (sink))
        return;
    if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_REMOVE) {
      g_debug ("Source removal event - index = %i", index);
      device_deactivate_voip_source (sink, FALSE);
    }
    else{
      pa_operation_unref (pa_context_get_source_info_by_index (c,
                                                               index,
                                                               pm_update_source_info_callback,
                                                               userdata) );
    }
    break;
  case PA_SUBSCRIPTION_EVENT_SINK_INPUT:
    if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_NEW) {
      g_debug ("some new sink input event ? - index = %i", index);
      // Maybe blocking state ?.
      pa_operation_unref (pa_context_get_sink_input_info (c,
                                                          index,
                                                          pm_sink_input_info_callback, userdata));
    }
    break;
  case PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT:
    g_debug ("source output event");
    if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_REMOVE) {
      gint cached_source_output_index = device_get_voip_source_output_index (sink);
      if (index == cached_source_output_index){
        g_debug ("Just saw a source output removal event - index = %i and cached index = %i", index, cached_source_output_index);
        device_deactivate_voip_client (sink);
      }
    }
    else if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_NEW) {
      g_debug ("some new source output event ? - index = %i", index);
      // Determine if its a VOIP app.
      pa_operation_unref (pa_context_get_source_output_info (c,
                                                            index,
                                                            pm_source_output_info_callback, userdata));
    }
    break;
  case PA_SUBSCRIPTION_EVENT_SERVER:
    g_debug("PA_SUBSCRIPTION_EVENT_SERVER event triggered.");
    pa_operation *o;
    if (!(o = pa_context_get_server_info (c, pm_server_info_callback, userdata))) {
      g_warning("subscribed_events_callback - pa_context_get_server_info() failed");
      return;
    }
    pa_operation_unref(o);
    break;
  }
}

static void
pm_context_state_callback (pa_context *c, void *userdata)
{
  switch (pa_context_get_state(c)) {
  case PA_CONTEXT_UNCONNECTED:
    g_debug("unconnected");
    break;
  case PA_CONTEXT_CONNECTING:
    g_debug("connecting - waiting for the server to become available");
    break;
  case PA_CONTEXT_AUTHORIZING:
    g_debug ("Authorizing");
    break;
  case PA_CONTEXT_SETTING_NAME:
    g_debug ("Setting name");
    break;
  case PA_CONTEXT_FAILED:
    g_warning("PA_CONTEXT_FAILED - Is PulseAudio Daemon running ?");
    device_sink_deactivated (DEVICE (userdata));
    if (reconnect_idle_id == 0){
      reconnect_idle_id = g_timeout_add_seconds (RECONNECT_DELAY,
                                                 reconnect_to_pulse,
                                                 (gpointer)userdata);
    }
    break;
  case PA_CONTEXT_TERMINATED:
    g_debug ("Terminated");
    device_sink_deactivated (DEVICE (userdata));

    if (reconnect_idle_id != 0){
      g_source_remove (reconnect_idle_id);
      reconnect_idle_id = 0;
    }
    break;
  case PA_CONTEXT_READY:
    connection_attempts = 0;
    g_debug("PA_CONTEXT_READY");
    if (reconnect_idle_id != 0){
      g_source_remove (reconnect_idle_id);
      reconnect_idle_id = 0;
    }
    pa_operation *o;

    pa_context_set_subscribe_callback(c, pm_subscribed_events_callback, userdata);

    if (!(o = pa_context_subscribe (c, (pa_subscription_mask_t)
                                   (PA_SUBSCRIPTION_MASK_SINK|
                                    PA_SUBSCRIPTION_MASK_SOURCE|
                                    PA_SUBSCRIPTION_MASK_SINK_INPUT|
                                    PA_SUBSCRIPTION_MASK_SOURCE_OUTPUT|
                                    PA_SUBSCRIPTION_MASK_SERVER), NULL, NULL))) {
      g_warning("pa_context_subscribe() failed");
    
    }

    if (!(o = pa_context_get_server_info (c, pm_server_info_callback, userdata))) {
      g_warning("Initial - pa_context_get_server_info() failed");
    }
    pa_operation_unref(o);
      
    break;
  }
}

/**
 After startup we go straight for the server info to see if it has details of
 the default sink and source. Normally these are valid, if there is none set
 fetch the list of each and try to determine the sink.
 **/
static void 
pm_server_info_callback (pa_context *c,
                         const pa_server_info *info,
                         void *userdata)
{
  pa_operation *operation;
  g_debug ("server info callback");

  if (info == NULL) {
    g_warning("No PA server - get the hell out of here");
    device_sink_deactivated (DEVICE (userdata));
    return;
  }
  // Go for the default sink
  if (info->default_sink_name != NULL) {
    g_debug ("default sink name from the server ain't null'");
    if (!(operation = pa_context_get_sink_info_by_name (c,
                                                       info->default_sink_name,
                                                       pm_default_sink_info_callback,
                                                       userdata) )) {
      g_warning("pa_context_get_sink_info_by_namet() failed");
      device_sink_deactivated (DEVICE (userdata));
      pa_operation_unref(operation);
      return;
    }
  } // If there is no default sink, try to determine a sink from the list of sinks
  else if (!(operation = pa_context_get_sink_info_list(c,
                                                       pm_sink_info_callback,
                                                       userdata))) {
    g_warning("pa_context_get_sink_info_list() failed");
    device_sink_deactivated (DEVICE (userdata));
    pa_operation_unref(operation);
    return;
  }
  // And the source
  if (info->default_source_name != NULL) {
    g_debug ("default source name from the server is not null'");
    if (!(operation = pa_context_get_source_info_by_name (c,
                                                          info->default_source_name,
                                                          pm_default_source_info_callback,
                                                          userdata) )) {
      g_warning("pa_context_get_default_source_info() failed");
      //  TODO: call some input deactivate method on active sink
      pa_operation_unref(operation);
      return;
    }
  }
  else if (!(operation = pa_context_get_source_info_list(c,
                                                         pm_source_info_callback,
                                                         userdata))) {
    g_warning("pa_context_get_sink_info_list() failed");
    //  TODO: call some input deactivate method for the source
  }
  pa_operation_unref(operation);
}

// If the server doesn't have a default sink to give us
// we should attempt to pick up the first of the list of sinks which doesn't have
// the name 'auto_null' (that was all really I was doing before)
static void
pm_sink_info_callback (pa_context *c,
                       const pa_sink_info *sink,
                       int eol,
                       void* userdata)
{
  if (eol > 0) {
    return;
  }
  else {
    if (IS_DEVICE (userdata) == FALSE || sink == NULL){
      g_warning ("sink info callback - our user data is not what we think it should be or the sink parameter is null");
      return;
    }
    Device* a_sink = DEVICE (userdata);
    if (device_is_sink_populated (a_sink) == FALSE &&
        g_ascii_strncasecmp("auto_null", sink->name, 9) != 0){
      device_sink_populate (a_sink, sink);
    }
  }
}

static void
pm_default_sink_info_callback (pa_context *c,
                               const pa_sink_info *info,
                               int eol,
                               void *userdata)
{
  if (eol > 0) {
    return;
  } 
  else {
    if (IS_DEVICE (userdata) == FALSE || info == NULL){
      g_warning ("Default sink info callback - our user data is not what we think it should be or the info parameter is null");
      return;
    }
    // Only repopulate if there is a change with regards the index
    if (device_get_sink_index (DEVICE (userdata)) == info->index)
      return;
    
    g_debug ("Pulse Server has handed us a new default sink");
    device_sink_populate (DEVICE (userdata), info);
  }
}

static void 
pm_sink_input_info_callback (pa_context *c,
                             const pa_sink_input_info *info,
                             int eol,
                             void *userdata)
{
  if (eol > 0) {
    return;
  }
  else {
    if (info == NULL || IS_DEVICE (userdata) == FALSE) {
      g_warning("Sink input info callback : SINK INPUT INFO IS NULL or our user_data is not what we think it should be");
      return;
    }
    Device* a_sink = DEVICE (userdata);
    // And finally check for the mute blocking state
    if (device_get_sink_index (a_sink) == info->sink){
      device_determine_blocking_state (a_sink);
    }
  }
}

static void
pm_source_output_info_callback (pa_context *c,
                                const pa_source_output_info *info,
                                int eol,
                                void *userdata)
{
  if (eol > 0) {
    return;
  }
  else {
    if (info == NULL || IS_DEVICE (userdata) == FALSE) {
      g_warning("Source output callback: SOURCE OUTPUT INFO IS NULL or our user_data is not what we think it should be");
      return;
    }

    // Check if this is Voip sink input
    gint result  = pa_proplist_contains (info->proplist, PA_PROP_MEDIA_ROLE);
    Device* a_sink = DEVICE (userdata);

    if (result == 1){
      //g_debug ("Source output info has media role property");
      const char* value = pa_proplist_gets (info->proplist, PA_PROP_MEDIA_ROLE);
      //g_debug ("prop role = %s", value);
      if (g_strcmp0 (value, "phone") == 0 || g_strcmp0 (value, "production") == 0) {
        g_debug ("We have a VOIP/PRODUCTION ! - index = %i", info->index);
        device_activate_voip_item (a_sink, (gint)info->index, (gint)info->client);
        // TODO to start with we will assume our source is the same as what this 'client'
        // is pointing at. This should probably be more intelligent :
        // query for the list of source output info's and going on the name of the client
        // from the sink input ensure our voip item is using the right source.
      }
    }
  }
}

static void 
pm_update_device (pa_context *c,
                       const pa_sink_info *info,
                       int eol,
                       void *userdata)
{
  if (eol > 0) {
    return;
  }
  else{
    if (IS_DEVICE (userdata) == FALSE || info == NULL){
      g_warning ("update_device - our user data is not what we think it should be or the info parameter is null");
      return;
    }
    device_sink_update (DEVICE(userdata), info);
  }
}

static void
pm_toggle_mute_for_every_sink_callback (pa_context *c,
                                        const pa_sink_info *sink,
                                        int eol,
                                        void* userdata)
{
  if (eol > 0) {
    return;
  }

  if (sink == NULL) {
    g_warning ("toggle_mute cb - sink parameter is null - why ?");
    return;
  }

  pa_operation *operation = NULL;
  operation =  pa_context_set_sink_mute_by_index (c,
                                                  sink->index,
                                                  GPOINTER_TO_INT(userdata),
                                                  NULL,
                                                  NULL);
  if (!operation){
    g_warning ("pm_update_mic_mute operation failed for some reason");
    return;
  }
  pa_operation_unref (operation);
}

// Source info related callbacks
static void
pm_default_source_info_callback (pa_context *c,
                                 const pa_source_info *info,
                                 int eol,
                                 void *userdata)
{
  if (eol > 0) {
    return;
  }
  else {
    if (IS_DEVICE (userdata) == FALSE || info == NULL){
      g_warning ("Default source info callback - our user data is not what we think it should be or the source info parameter is null");
      return;
    }
    // If there is an index change we need to change our cached source
    if (device_get_source_index (DEVICE (userdata)) == info->index)
      return;
    g_debug ("Pulse Server has handed us a new default source");
    device_deactivate_voip_source (DEVICE (userdata), TRUE);
    device_update_voip_input_source (DEVICE (userdata), info);
  }
}

static void
pm_source_info_callback (pa_context *c,
                         const pa_source_info *info,
                         int eol,
                         void *userdata)
{
  if (eol > 0) {
    return;
  }
  else {
    if (IS_DEVICE (userdata) == FALSE || info == NULL){
      g_warning ("source info callback - our user data is not what we think it should be or the source info parameter is null");
      return;
    }
    // For now we will take the first available
    if (device_is_voip_source_populated (DEVICE (userdata)) == FALSE){
      device_update_voip_input_source (DEVICE (userdata), info);
    }
  }
}

static void
pm_update_source_info_callback (pa_context *c,
                                const pa_source_info *info,
                                int eol,
                                void *userdata)
{
  if (eol > 0) {
    return;
  }
  else {
    if (IS_DEVICE (userdata) == FALSE || info == NULL ){
      g_warning ("source info update callback - our user data is not what we think it should be or the source info paramter is null");
      return;
    }
    g_debug ("Got a source update for %s , index %i", info->name, info->index);
    device_update_voip_input_source (DEVICE (userdata), info);
  }
}