pulsesink: clear ringbuffer when asked to

Since we map the ringbuffer to the pulseaudio internal ringbuffer, flush the
pulseaudio buffer when we are asked to clear the ringbuffer.
This avoids some leftover audio after a seek.

diff --git a/ext/pulse/pulsesink.c b/ext/pulse/pulsesink.c
index f30abf0..a261c1e 100644 (file)
--- a/ext/pulse/pulsesink.c
+++ b/ext/pulse/pulsesink.c
@@ -132,6 +132,7 @@ static gboolean gst_pulseringbuffer_release (GstRingBuffer * buf);
 static gboolean gst_pulseringbuffer_start (GstRingBuffer * buf);
 static gboolean gst_pulseringbuffer_pause (GstRingBuffer * buf);
 static gboolean gst_pulseringbuffer_stop (GstRingBuffer * buf);
+static void gst_pulseringbuffer_clear (GstRingBuffer * buf);
 static guint gst_pulseringbuffer_commit (GstRingBuffer * buf,
     guint64 * sample, guchar * data, gint in_samples, gint out_samples,
     gint * accum);
@@ -188,6 +189,8 @@ gst_pulseringbuffer_class_init (GstPulseRingBufferClass * klass)
   gstringbuffer_class->pause = GST_DEBUG_FUNCPTR (gst_pulseringbuffer_pause);
   gstringbuffer_class->resume = GST_DEBUG_FUNCPTR (gst_pulseringbuffer_start);
   gstringbuffer_class->stop = GST_DEBUG_FUNCPTR (gst_pulseringbuffer_stop);
+  gstringbuffer_class->clear_all =
+      GST_DEBUG_FUNCPTR (gst_pulseringbuffer_clear);
 
   gstringbuffer_class->commit = GST_DEBUG_FUNCPTR (gst_pulseringbuffer_commit);
 
@@ -798,6 +801,26 @@ cork_failed:
   }
 }
 
+static void
+gst_pulseringbuffer_clear (GstRingBuffer * buf)
+{
+  GstPulseSink *psink;
+  GstPulseRingBuffer *pbuf;
+  pa_operation *o = NULL;
+
+  pbuf = GST_PULSERING_BUFFER_CAST (buf);
+  psink = GST_PULSESINK_CAST (GST_OBJECT_PARENT (pbuf));
+
+  pa_threaded_mainloop_lock (psink->mainloop);
+  GST_DEBUG_OBJECT (psink, "clearing");
+  if (pbuf->stream) {
+    /* don't wait for the flush to complete */
+    if ((o = pa_stream_flush (pbuf->stream, NULL, pbuf)))
+      pa_operation_unref (o);
+  }
+  pa_threaded_mainloop_unlock (psink->mainloop);
+}
+
 /* start/resume playback ASAP, we don't uncork here but in the commit method */
 static gboolean
 gst_pulseringbuffer_start (GstRingBuffer * buf)