[PATCH] dtas-readahead: avoid polling on pause

[Eric Wong <e@80x24.org>]

When a player is paused with nothing player, we will not waste CPU
time polling for the player to become available.  It is wasteful
of processing power and battery life.
---
 bin/dtas-readahead | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/bin/dtas-readahead b/bin/dtas-readahead
index f02bc35..798a5b4 100644
--- a/bin/dtas-readahead
+++ b/bin/dtas-readahead
@@ -190,12 +190,16 @@ begin
     end
     idx or break
     cur = YAML.load(c.req('current'))
-    cur['current'] or break
+    current = cur['current'] or break
+  end
+  if current
+    elapsed = DTAS.now - t0
+    p [:elapsed, elapsed]
+    timeout = 5 - elapsed
+    timeout = 0 if timeout < 0
+  else
+    timeout = nil
   end
-  elapsed = DTAS.now - t0
-  p [:elapsed, elapsed]
-  timeout = 5 - elapsed
-  timeout = 0 if timeout < 0
   r = wait_read(w, timeout)
   p w.res_wait if r
 rescue EOFError
-- 
EW