From 50b4468598cbc032c0ec4597df9637f71b9ef664 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Thu, 18 Jan 2007 00:22:24 +0000
Subject: [PATCH] change while loops to do-while as the condition is true the
first time and the check just wastes cpu cycles
Originally committed as revision 7576 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavutil/fifo.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/libavutil/fifo.c b/libavutil/fifo.c
index b86d2629ee8..8ac3a0cb55c 100644
--- a/libavutil/fifo.c
+++ b/libavutil/fifo.c
@@ -73,7 +73,7 @@ void av_fifo_realloc(AVFifoBuffer *f, unsigned int new_size) {
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 @@ void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size)
f->wptr = f->buffer;
buf += len;
size -= len;
- }
+ } while (size > 0);
}
@@ -92,7 +92,7 @@ int av_fifo_generic_read(AVFifoBuffer *f, int buf_size, void (*func)(void*, void
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 @@ int av_fifo_generic_read(AVFifoBuffer *f, int buf_size, void (*func)(void*, void
}
av_fifo_drain(f, len);
buf_size -= len;
- }
+ } while (buf_size > 0);
return 0;
}
--
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