From 6f9d46539bce25828e3229db6cd9c0dbae1f3e11 Mon Sep 17 00:00:00 2001
From: zhangmeng <775834166@qq.com>
Date: 星期日, 19 一月 2020 11:43:34 +0800
Subject: [PATCH] update ffmpeg
---
csrc/thirdparty/ffmpeg/include/libavutil/lfg.h | 15 ++++++++++++---
1 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/csrc/thirdparty/ffmpeg/include/libavutil/lfg.h b/csrc/thirdparty/ffmpeg/include/libavutil/lfg.h
index 03f779a..2b66920 100644
--- a/csrc/thirdparty/ffmpeg/include/libavutil/lfg.h
+++ b/csrc/thirdparty/ffmpeg/include/libavutil/lfg.h
@@ -24,6 +24,12 @@
#include <stdint.h>
+/**
+ * Context structure for the Lagged Fibonacci PRNG.
+ * The exact layout, types and content of this struct may change and should
+ * not be accessed directly. Only its sizeof() is guranteed to stay the same
+ * to allow easy instanciation.
+ */
typedef struct AVLFG {
unsigned int state[64];
int index;
@@ -45,8 +51,9 @@
* it may be good enough and faster for your specific use case.
*/
static inline unsigned int av_lfg_get(AVLFG *c){
- c->state[c->index & 63] = c->state[(c->index-24) & 63] + c->state[(c->index-55) & 63];
- return c->state[c->index++ & 63];
+ unsigned a = c->state[c->index & 63] = c->state[(c->index-24) & 63] + c->state[(c->index-55) & 63];
+ c->index += 1U;
+ return a;
}
/**
@@ -57,7 +64,9 @@
static inline unsigned int av_mlfg_get(AVLFG *c){
unsigned int a= c->state[(c->index-55) & 63];
unsigned int b= c->state[(c->index-24) & 63];
- return c->state[c->index++ & 63] = 2*a*b+a+b;
+ a = c->state[c->index & 63] = 2*a*b+a+b;
+ c->index += 1U;
+ return a;
}
/**
--
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