From 50b4468598cbc032c0ec4597df9637f71b9ef664 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 18 Jan 2007 00:22:24 +0000 Subject: 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(-) (limited to 'libavutil/fifo.c') diff --git a/libavutil/fifo.c b/libavutil/fifo.c index b86d2629ee..8ac3a0cb55 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; } -- cgit v1.2.3