add functions to move all inputs of a sink away/similar for source outputs

src/pulsecore/sink.c

@@ -474,6 +474,58 @@ int pa_sink_suspend(pa_sink *s, pa_bool_t suspend) {
         return sink_set_state(s, pa_sink_used_by(s) ? PA_SINK_RUNNING : PA_SINK_IDLE);
 }
 
+/* Called from main context */
+pa_queue *pa_sink_move_all_start(pa_sink *s) {
+    pa_queue *q;
+    pa_sink_input *i, *n;
+    uint32_t idx;
+
+    pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_IS_LINKED(s->state));
+
+    q = pa_queue_new();
+
+    for (i = PA_SINK_INPUT(pa_idxset_first(s->inputs, &idx)); i; i = n) {
+        n = PA_SINK_INPUT(pa_idxset_next(s->inputs, &idx));
+
+        if (pa_sink_input_start_move(i) >= 0)
+            pa_queue_push(q, pa_sink_input_ref(i));
+    }
+
+    return q;
+}
+
+/* Called from main context */
+void pa_sink_move_all_finish(pa_sink *s, pa_queue *q) {
+    pa_sink_input *i;
+
+    pa_sink_assert_ref(s);
+    pa_assert(PA_SINK_IS_LINKED(s->state));
+    pa_assert(q);
+
+    while ((i = PA_SINK_INPUT(pa_queue_pop(q)))) {
+        if (pa_sink_input_finish_move(i, s) < 0)
+            pa_sink_input_unlink(i);
+
+        pa_sink_input_unref(i);
+    }
+
+    pa_queue_free(q, NULL, NULL);
+}
+
+/* Called from main context */
+void pa_sink_move_all_fail(pa_queue *q) {
+    pa_sink_input *i;
+    pa_assert(q);
+
+    while ((i = PA_SINK_INPUT(pa_queue_pop(q)))) {
+        pa_sink_input_unlink(i);
+        pa_sink_input_unref(i);
+    }
+
+    pa_queue_free(q, NULL, NULL);
+}
+
 /* Called from IO thread context */
 void pa_sink_process_rewind(pa_sink *s, size_t nbytes) {
     pa_sink_input *i;

src/pulsecore/sink.h

@@ -40,6 +40,7 @@ typedef struct pa_sink pa_sink;
 #include <pulsecore/msgobject.h>
 #include <pulsecore/rtpoll.h>
 #include <pulsecore/card.h>
+#include <pulsecore/queue.h>
 
 #define PA_MAX_INPUTS_PER_SINK 32
 
@@ -254,6 +255,11 @@ unsigned pa_sink_used_by(pa_sink *s); /* Number of connected streams which are n
 unsigned pa_sink_check_suspend(pa_sink *s); /* Returns how many streams are active that don't allow suspensions */
 #define pa_sink_get_state(s) ((s)->state)
 
+/* Moves all inputs away, and stores them in pa_queue */
+pa_queue *pa_sink_move_all_start(pa_sink *s);
+void pa_sink_move_all_finish(pa_sink *s, pa_queue *q);
+void pa_sink_move_all_fail(pa_queue *q);
+
 /* To be called exclusively by the sink driver, from IO context */
 
 void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result);

src/pulsecore/source.c

@@ -412,6 +412,58 @@ int pa_source_suspend(pa_source *s, pa_bool_t suspend) {
         return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
 }
 
+/* Called from main context */
+pa_queue *pa_source_move_all_start(pa_source *s) {
+    pa_queue *q;
+    pa_source_output *o, *n;
+    uint32_t idx;
+
+    pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_IS_LINKED(s->state));
+
+    q = pa_queue_new();
+
+    for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = n) {
+        n = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx));
+
+        if (pa_source_output_start_move(o) >= 0)
+            pa_queue_push(q, pa_source_output_ref(o));
+    }
+
+    return q;
+}
+
+/* Called from main context */
+void pa_source_move_all_finish(pa_source *s, pa_queue *q) {
+    pa_source_output *o;
+
+    pa_source_assert_ref(s);
+    pa_assert(PA_SOURCE_IS_LINKED(s->state));
+    pa_assert(q);
+
+    while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
+        if (pa_source_output_finish_move(o, s) < 0)
+            pa_source_output_unlink(o);
+
+        pa_source_output_unref(o);
+    }
+
+    pa_queue_free(q, NULL, NULL);
+}
+
+/* Called from main context */
+void pa_source_move_all_fail(pa_queue *q) {
+    pa_source_output *o;
+    pa_assert(q);
+
+    while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
+        pa_source_output_unlink(o);
+        pa_source_output_unref(o);
+    }
+
+    pa_queue_free(q, NULL, NULL);
+}
+
 /* Called from IO thread context */
 void pa_source_process_rewind(pa_source *s, size_t nbytes) {
     pa_source_output *o;

src/pulsecore/source.h

@@ -42,6 +42,7 @@ typedef struct pa_source pa_source;
 #include <pulsecore/rtpoll.h>
 #include <pulsecore/source-output.h>
 #include <pulsecore/card.h>
+#include <pulsecore/queue.h>
 
 #define PA_MAX_OUTPUTS_PER_SOURCE 32
 
@@ -233,6 +234,11 @@ unsigned pa_source_used_by(pa_source *s); /* Number of connected streams that ar
 unsigned pa_source_check_suspend(pa_source *s); /* Returns how many streams are active that don't allow suspensions */
 #define pa_source_get_state(s) ((pa_source_state_t) (s)->state)
 
+/* Moves all inputs away, and stores them in pa_queue */
+pa_queue *pa_source_move_all_start(pa_source *s);
+void pa_source_move_all_finish(pa_source *s, pa_queue *q);
+void pa_source_move_all_fail(pa_queue *q);
+
 /* To be called exclusively by the source driver, from IO context */
 
 void pa_source_post(pa_source*s, const pa_memchunk *chunk);