From 32b936d0c368db467be1c0501b36d9a995545675 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Reimar=20D=C3=B6ffinger?= <Reimar.Doeffinger@gmx.de>
Date: Mon, 9 Mar 2009 09:26:32 +0000
Subject: [PATCH] Add av_fifo_reset function to completely reset fifo state,
which makes it easier to reuse the fifo.
Originally committed as revision 17901 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavutil/fifo.c | 8 +++++++-
libavutil/fifo.h | 6 ++++++
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/libavutil/fifo.c b/libavutil/fifo.c
index f36dfeea6e5..9a9a139f3b1 100644
--- a/libavutil/fifo.c
+++ b/libavutil/fifo.c
@@ -27,9 +27,9 @@ AVFifoBuffer *av_fifo_alloc(unsigned int size)
AVFifoBuffer *f= av_mallocz(sizeof(AVFifoBuffer));
if(!f)
return NULL;
- f->wptr = f->rptr =
f->buffer = av_malloc(size);
f->end = f->buffer + size;
+ av_fifo_reset(f);
if (!f->buffer)
av_freep(&f);
return f;
@@ -43,6 +43,12 @@ void av_fifo_free(AVFifoBuffer *f)
}
}
+void av_fifo_reset(AVFifoBuffer *f)
+{
+ f->wptr = f->rptr = f->buffer;
+ f->wndx = f->rndx = 0;
+}
+
int av_fifo_size(AVFifoBuffer *f)
{
return (uint32_t)(f->wndx - f->rndx);
diff --git a/libavutil/fifo.h b/libavutil/fifo.h
index 9ba7e700fc0..f64914f7c62 100644
--- a/libavutil/fifo.h
+++ b/libavutil/fifo.h
@@ -47,6 +47,12 @@ AVFifoBuffer *av_fifo_alloc(unsigned int size);
*/
void av_fifo_free(AVFifoBuffer *f);
+/**
+ * Resets the AVFifoBuffer to the state right after av_fifo_alloc, in particular it is emptied.
+ * @param *f AVFifoBuffer to reset
+ */
+void av_fifo_reset(AVFifoBuffer *f);
+
/**
* Returns the amount of data in bytes in the AVFifoBuffer, that is the
* amount of data you can read from it.
--
GitLab