alsa-sink: increase watermark when there is nothing to rewind

If we do not manage to rewind at all because there is nothing to rewind
any more, it means the latency is too small, and we let audio escape our
control. We should thus increase the watermark to fix this.

Fixes #871

Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/287>

diff --git a/src/modules/alsa/alsa-sink.c b/src/modules/alsa/alsa-sink.c
index f7fef8a..bd8377c 100644 (file)
--- a/src/modules/alsa/alsa-sink.c
+++ b/src/modules/alsa/alsa-sink.c
@@ -1877,8 +1877,11 @@ static int process_rewind(struct userdata *u) {
             u->after_rewind = true;
             return 0;
         }
-    } else
+    } else {
         pa_log_debug("Mhmm, actually there is nothing to rewind.");
+        if (u->use_tsched)
+            increase_watermark(u);
+    }
 
 rewind_done:
     pa_sink_process_rewind(u->sink, 0);