sndio: Make use of the sio_flush() function

Use sio_flush() instead of sio_stop() to improve controls responsiveness.

Co-authored-by: Brad Smith <[email protected]>

configure.ac

@@ -404,12 +404,19 @@ ENABLE_PLUGIN_WITH_DEP(pulse,
     PULSE,
     libpulse >= 0.9.5)
 
-ENABLE_PLUGIN_WITH_DEP(sndio,
+test_sndio () {
+    PKG_CHECK_MODULES(SNDIO, sndio >= 1.9, [
+        AC_DEFINE(HAVE_SNDIO_1_9, 1, [Define if sndio version is >= 1.9])
+        have_sndio=yes
+    ], [
+        PKG_CHECK_MODULES(SNDIO, sndio, have_sndio=yes, have_sndio=no)
+    ])
+}
+
+ENABLE_PLUGIN_WITH_TEST(sndio,
     Sndio output,
     auto,
-    OUTPUT,
-    SNDIO,
-    sndio)
+    OUTPUT)
 
 test_cue () {
     PKG_CHECK_MODULES(CUE, libcue >= 2.0, [

src/config.h.meson

@@ -28,6 +28,7 @@
 #mesondefine FILEWRITER_VORBIS
 
 #mesondefine HAVE_LIBCUE2
+#mesondefine HAVE_SNDIO_1_9
 
 #mesondefine HAVE_ADPLUG_NEMUOPL_H
 #mesondefine HAVE_ADPLUG_WEMUOPL_H

src/sndio/meson.build

@@ -2,6 +2,11 @@ sndio_dep = dependency('sndio', required: false)
 have_sndio = sndio_dep.found()
 
 
+if sndio_dep.version().version_compare('>= 1.9.0')
+  conf.set10('HAVE_SNDIO_1_9', true)
+endif
+
+
 if have_sndio
   shared_module('sndio-ng',
     'sndio.cc',

src/sndio/sndio.cc

@@ -344,7 +344,11 @@ void SndioPlugin::flush ()
 {
     pthread_mutex_lock (& m_mutex);
 
+#if HAVE_SNDIO_1_9
+    sio_flush (m_handle);
+#else
     sio_stop (m_handle);
+#endif
 
     m_frames_buffered = 0;
     m_last_write_time = timeval ();