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Code Issues Releases Activity

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

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Originally committed as revision 7576 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-01-18 00:22:24 +00:00
parent 4497712f09
commit 50b4468598
1 changed files with 4 additions and 4 deletions
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8
libavutil/fifo.c
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@ -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) void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size)
{ {
while (size > 0) { do {
int len = FFMIN(f->end - f->wptr, size); int len = FFMIN(f->end - f->wptr, size);
memcpy(f->wptr, buf, len); memcpy(f->wptr, buf, len);
f->wptr += len; f->wptr += len;
@ -81,7 +81,7 @@ void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size)
f->wptr = f->buffer; f->wptr = f->buffer;
buf += len; buf += len;
size -= 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) if (size < buf_size)
return -1; return -1;
while (buf_size > 0) { do {
int len = FFMIN(f->end - f->rptr, buf_size); int len = FFMIN(f->end - f->rptr, buf_size);
if(func) func(dest, f->rptr, len); if(func) func(dest, f->rptr, len);
else{ else{
@ -101,7 +101,7 @@ int av_fifo_generic_read(AVFifoBuffer *f, int buf_size, void (*func)(void*, void
} }
av_fifo_drain(f, len); av_fifo_drain(f, len);
buf_size -= len; buf_size -= len;
} } while (buf_size > 0);
return 0; return 0;
} }