@@ -21,6 +21,7 @@

 #include <unistd.h>

 #include <fcntl.h>

 #include "timer.h"

+#include "time.h"

 #include "random_seed.h"

 #include "avutil.h"

@@ -37,6 +38,38 @@ static int read_random(uint32_t *dst, const char *file)

     return err;

 }

+static uint32_t get_generic_seed(void)

+{

+    int last_t=0;

+    int bits=0;

+    uint64_t random=0;

+    int i;

+    int s=0;

+

+    for(i=0;bits<64;i++){

+        int t= clock()>>s;

+        if(last_t && t != last_t){

+            if(i<10000U && s<24){

+                s++;

+                i=t=0;

+            }else{

+                random= 2*random + (i&1);

+                bits++;

+            }

+        }

+        last_t= t;

+    }

+#ifdef AV_READ_TIME

+    random ^= AV_READ_TIME();

+#else

+    random ^= clock();

+#endif

+

+    random += random>>32;

+

+    return random;

+}

+

 uint32_t av_get_random_seed(void)

 {

     uint32_t seed;

@@ -45,12 +78,7 @@ uint32_t av_get_random_seed(void)

         return seed;

     if (read_random(&seed, "/dev/random")  == sizeof(seed))

         return seed;

-

-#ifdef AV_READ_TIME

-    seed = AV_READ_TIME();

-#endif

-    // XXX what to do ?

-    return seed;

+    return get_generic_seed();

 }

 #if LIBAVUTIL_VERSION_MAJOR < 51