From c8b51eb063e5b5d6eade7fac623873ba7181b860 Mon Sep 17 00:00:00 2001
From: bsongis <bsongis@8db61ce9-5e8f-94c8-fa6b-1d1c8bcca7d0>
Date: Mon, 29 Oct 2012 19:20:00 +0000
Subject: [PATCH] [all] Silence suppression at begin and end of TTS generated
 prompts

---
 util/tts.py | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/util/tts.py b/util/tts.py
index b6b8f49f9..24f6f8a01 100644
--- a/util/tts.py
+++ b/util/tts.py
@@ -54,7 +54,22 @@ def generate(str, idx, alternate=0):
             o.setnchannels(i.getnchannels())
             o.setsampwidth(i.getsampwidth())
             o.setframerate(i.getframerate())
-            o.writeframes(f[6400:-6400])
+            start = 0
+            end = 0
+            for i in range(n/2):
+                sample = ord(f[2*i+1])
+                # print sample,
+                if sample != 0xFF and sample != 0x00:
+                    start = i
+                    break
+            for i in range(n/2):
+                sample = ord(f[-2*i-1])
+                # print sample,
+                if sample != 0xFF and sample != 0x00:
+                    end = i
+                    break
+            # print 2*start, 2*end,  
+            o.writeframes(f[2*start:-2*end])
             o.close()                
             os.remove(temp)           
         elif "espeak" in sys.argv:
@@ -87,12 +102,13 @@ def generate(str, idx, alternate=0):
             os.remove(temp)
 	
         print result, str
-        
+    
     if result:
         return [(result, str)]
     else:
         return []       
 
+
 if __name__ == "__main__":
     
     sounds = []