[Ffmpeg-cvslog] r7576 - trunk/libavutil/fifo.c

[michael]

Author: michael
Date: Thu Jan 18 01:22:24 2007
New Revision: 7576

Modified:
   trunk/libavutil/fifo.c

Log:
change while loops to do-while as the condition is true the first time and the check just wastes cpu cycles


Modified: trunk/libavutil/fifo.c
==============================================================================
--- trunk/libavutil/fifo.c	(original)
+++ trunk/libavutil/fifo.c	Thu Jan 18 01:22:24 2007
@@ -73,7 +73,7 @@
 
 void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size)
 {
-    while (size > 0) {
+    do {
         int len = FFMIN(f->end - f->wptr, size);
         memcpy(f->wptr, buf, len);
         f->wptr += len;
@@ -81,7 +81,7 @@
             f->wptr = f->buffer;
         buf += len;
         size -= len;
-    }
+    } while (size > 0);
 }
 
 
@@ -92,7 +92,7 @@
 
     if (size < buf_size)
         return -1;
-    while (buf_size > 0) {
+    do {
         int len = FFMIN(f->end - f->rptr, buf_size);
         if(func) func(dest, f->rptr, len);
         else{
@@ -101,7 +101,7 @@
         }
         av_fifo_drain(f, len);
         buf_size -= len;
-    }
+    } while (buf_size > 0);
     return 0;
 }