From cc67e49563096e4367881e8bbe4554f1a7d21595 Mon Sep 17 00:00:00 2001
From: neonloop
Date: Sun, 14 Mar 2021 18:54:30 +0000
Subject: Adds frameskip based on free audio buffer space

---
 plugins/dfsound/alsa.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

(limited to 'plugins/dfsound/alsa.c')

diff --git a/plugins/dfsound/alsa.c b/plugins/dfsound/alsa.c
index 6b9f83e..9873655 100644
--- a/plugins/dfsound/alsa.c
+++ b/plugins/dfsound/alsa.c
@@ -166,20 +166,22 @@ static void alsa_finish(void)
   }
 }
 
-// GET BYTES BUFFERED
-static int alsa_busy(void)
-{
+static float alsa_capacity(void) {
  int l;
 
- if (handle == NULL)                                 // failed to open?
-  return 1;
+ if (handle == NULL) return 0;
+ if (buffer_size == 0) return 0;
+
  l = snd_pcm_avail(handle);
  if (l < 0) return 0;
- if (l < buffer_size / 2)                            // can we write in at least the half of fragments?
-      l = 1;                                         // -> no? wait
- else l = 0;                                         // -> else go on
 
- return l;
+ return (float)l / buffer_size;
+}
+
+// GET BYTES BUFFERED
+static int alsa_busy(void)
+{
+ return alsa_capacity() < 0.5;
 }
 
 // FEED SOUND DATA
@@ -219,4 +221,5 @@ void out_register_alsa(struct out_driver *drv)
 	drv->finish = alsa_finish;
 	drv->busy = alsa_busy;
 	drv->feed = alsa_feed;
+  drv->capacity = alsa_capacity;
 }
-- 
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