RingBuffer: Fix the read position on re-creation of the buffer.

MythTV · Jun 6, 2011 · 88f3e77 · 88f3e77
1 parent 7079e82
commit 88f3e77
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/mythtv/libs/libmythtv/ringbuffer.cpp b/mythtv/libs/libmythtv/ringbuffer.cpp
@@ -675,7 +675,8 @@ void RingBuffer::CreateReadAheadBuffer(void)
         memcpy(newbuffer + (oldsize - rbwpos), readAheadBuffer, rbwpos);
         delete [] readAheadBuffer;
         readAheadBuffer = newbuffer;
-        rbrpos = rbrpos + oldsize - rbwpos;
+        rbrpos = (rbrpos > rbwpos) ? (rbrpos - rbwpos) :
+                                     (rbrpos + oldsize - rbwpos);
         rbwpos = oldsize;
     }
     else