更新代码

ffmpegdemo/ffmpeg/ffmpeg4/include64/libavutil/ffversion.h

@@ -1,5 +1,5 @@
 /* Automatically generated by version.sh, do not manually edit! */
 #ifndef AVUTIL_FFVERSION_H
 #define AVUTIL_FFVERSION_H
-#define FFMPEG_VERSION "4.2.1"
+#define FFMPEG_VERSION "4.2.3"
 #endif /* AVUTIL_FFVERSION_H */

ffmpegdemo/ffmpeg/ffmpeg4/include64/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 @@ int av_lfg_init_from_data(AVLFG *c, const uint8_t *data, unsigned int length);
  * 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_lfg_get(AVLFG *c){
 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;
 }
 
 /**