core: Add an "internal" suspend causerhel-7.0-test

This lets us suspend devices from within the core for short periods
without having to overload one of the existing suspend causes.

https://bugs.freedesktop.org/show_bug.cgi?id=64118

3 files changed, 17 insertions, 6 deletions

diff --git a/src/pulsecore/core.h b/src/pulsecore/core.h
index cf7cc1198..6b5b16ae5 100644
--- a/src/pulsecore/core.h
+++ b/src/pulsecore/core.h
@@ -36,6 +36,7 @@ typedef enum pa_suspend_cause {
     PA_SUSPEND_IDLE = 4,         /* Used by module-suspend-on-idle */
     PA_SUSPEND_SESSION = 8,      /* Used by module-hal for mark inactive sessions */
     PA_SUSPEND_PASSTHROUGH = 16, /* Used to suspend monitor sources when the sink is in passthrough mode */
+    PA_SUSPEND_INTERNAL = 32,    /* This is used for short period server-internal suspends, such as for sample rate updates */
     PA_SUSPEND_ALL = 0xFFFF      /* Magic cause that can be used to resume forcibly */
 } pa_suspend_cause_t;
 
diff --git a/src/pulsecore/sink.c b/src/pulsecore/sink.c
index 451247092..1522e60b2 100644
--- a/src/pulsecore/sink.c
+++ b/src/pulsecore/sink.c
@@ -1337,6 +1337,8 @@ void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result) {
 /* Called from main thread */
 pa_bool_t pa_sink_update_rate(pa_sink *s, uint32_t rate, pa_bool_t passthrough)
 {
+    pa_bool_t ret = FALSE;
+
     if (s->update_rate) {
         uint32_t desired_rate = rate;
         uint32_t default_rate = s->default_sample_rate;
@@ -1395,7 +1397,7 @@ pa_bool_t pa_sink_update_rate(pa_sink *s, uint32_t rate, pa_bool_t passthrough)
         if (!passthrough && pa_sink_used_by(s) > 0)
             return FALSE;
 
-        pa_sink_suspend(s, TRUE, PA_SUSPEND_IDLE); /* needed before rate update, will be resumed automatically */
+        pa_sink_suspend(s, TRUE, PA_SUSPEND_INTERNAL);
 
         if (s->update_rate(s, desired_rate) == TRUE) {
             /* update monitor source as well */
@@ -1408,10 +1410,13 @@ pa_bool_t pa_sink_update_rate(pa_sink *s, uint32_t rate, pa_bool_t passthrough)
                     pa_sink_input_update_rate(i);
             }
 
-            return TRUE;
+            ret = TRUE;
         }
+
+        pa_sink_suspend(s, FALSE, PA_SUSPEND_INTERNAL);
     }
-    return FALSE;
+
+    return ret ;
 }
 
 /* Called from main thread */
diff --git a/src/pulsecore/source.c b/src/pulsecore/source.c
index e9c366989..5c264e0c1 100644
--- a/src/pulsecore/source.c
+++ b/src/pulsecore/source.c
@@ -955,6 +955,8 @@ void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *
 /* Called from main thread */
 pa_bool_t pa_source_update_rate(pa_source *s, uint32_t rate, pa_bool_t passthrough)
 {
+    pa_bool_t ret = FALSE;
+
     if (s->update_rate) {
         uint32_t desired_rate = rate;
         uint32_t default_rate = s->default_sample_rate;
@@ -1006,7 +1008,7 @@ pa_bool_t pa_source_update_rate(pa_source *s, uint32_t rate, pa_bool_t passthrou
         if (!passthrough && pa_source_used_by(s) > 0)
             return FALSE;
 
-        pa_source_suspend(s, TRUE, PA_SUSPEND_IDLE); /* needed before rate update, will be resumed automatically */
+        pa_source_suspend(s, TRUE, PA_SUSPEND_INTERNAL);
 
         if (s->update_rate(s, desired_rate) == TRUE) {
             pa_log_info("Changed sampling rate successfully ");
@@ -1015,10 +1017,13 @@ pa_bool_t pa_source_update_rate(pa_source *s, uint32_t rate, pa_bool_t passthrou
                 if (o->state == PA_SOURCE_OUTPUT_CORKED)
                     pa_source_output_update_rate(o);
             }
-            return TRUE;
+            ret = TRUE;
         }
+
+        pa_source_suspend(s, FALSE, PA_SUSPEND_INTERNAL);
     }
-    return FALSE;
+
+    return ret;
 }
 
 /* Called from main thread */