pactl: add `get_default_source` command

Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/430>

2 files changed, 25 insertions, 0 deletions

diff --git a/man/pactl.1.xml.in b/man/pactl.1.xml.in
index b95afa724..3402ed707 100644
--- a/man/pactl.1.xml.in
+++ b/man/pactl.1.xml.in
@@ -177,6 +177,11 @@ License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
     </option>
 
     <option>
+      <p><opt>get-default-source</opt></p>
+      <optdesc><p>Returns the symbolic name of the default source.</p></optdesc>
+    </option>
+
+    <option>
       <p><opt>set-default-source</opt> <arg>SOURCE</arg></p>
       <optdesc><p>Make the specified source (identified by its symbolic name or numerical index) the default source.</p></optdesc>
     </option>
diff --git a/src/utils/pactl.c b/src/utils/pactl.c
index e7f71ee4b..dc4fcb896 100644
--- a/src/utils/pactl.c
+++ b/src/utils/pactl.c
@@ -124,6 +124,7 @@ static enum {
     GET_DEFAULT_SINK,
     SET_DEFAULT_SINK,
     SET_SOURCE_PORT,
+    GET_DEFAULT_SOURCE,
     SET_DEFAULT_SOURCE,
     GET_SINK_VOLUME,
     SET_SINK_VOLUME,
@@ -203,6 +204,18 @@ static void get_default_sink(pa_context *c, const pa_server_info *i, void *userd
     complete_action();
 }
 
+static void get_default_source(pa_context *c, const pa_server_info *i, void *userdata) {
+    if (!i) {
+        pa_log(_("Failed to get server information: %s"), pa_strerror(pa_context_errno(c)));
+        quit(1);
+        return;
+    }
+
+    printf(_("%s\n"), i->default_source_name);
+
+    complete_action();
+}
+
 static void get_server_info_callback(pa_context *c, const pa_server_info *i, void *useerdata) {
     char ss[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 
@@ -1528,6 +1541,10 @@ static void context_state_callback(pa_context *c, void *userdata) {
                     o = pa_context_set_source_port_by_name(c, source_name, port_name, simple_callback, NULL);
                     break;
 
+                case GET_DEFAULT_SOURCE:
+                    o = pa_context_get_server_info(c, get_default_source, NULL);
+                    break;
+
                 case SET_DEFAULT_SOURCE:
                     o = pa_context_set_default_source(c, source_name, simple_callback, NULL);
                     break;
@@ -2086,6 +2103,9 @@ int main(int argc, char *argv[]) {
 
             source_name = pa_xstrdup(argv[optind+1]);
 
+        } else if (pa_streq(argv[optind], "get-default-source")) {
+            action = GET_DEFAULT_SOURCE;
+
         } else if (pa_streq(argv[optind], "get-sink-volume")) {
             action = GET_SINK_VOLUME;