From 0f340f8fc54dfca02eecc3f9143fc21230938321 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Tue, 8 Jan 2008 00:54:19 +0000
Subject: [PATCH] A little proggy i wrote years ago. This simply writes burts
of random data into a file. Great for testing error
robustness/resilience/concealment.
Originally committed as revision 11459 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
tools/trasher.c | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
create mode 100644 tools/trasher.c
diff --git a/tools/trasher.c b/tools/trasher.c
new file mode 100644
index 00000000000..a9d27736db1
--- /dev/null
+++ b/tools/trasher.c
@@ -0,0 +1,40 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <inttypes.h>
+
+int main(int argc, char** argv)
+{
+ FILE *f= fopen(argv[1], "rb+");
+ int count= atoi(argv[2]);
+ int maxburst= atoi(argv[3]);
+ int length, i;
+
+ srand (time (0));
+
+ fseek(f, 0, SEEK_END);
+ length= ftell(f);
+ fseek(f, 0, SEEK_SET);
+
+ while(count--){
+ int burst= 1 + random() * (uint64_t) (abs(maxburst)-1) / RAND_MAX;
+ int pos= random() * (uint64_t) length / RAND_MAX;
+ fseek(f, pos, SEEK_SET);
+
+ if(maxburst<0) burst= -maxburst;
+
+ if(pos + burst > length)
+ continue;
+
+ while(burst--){
+ int val= random() * 256ULL / RAND_MAX;
+
+ if(maxburst<0) val=0;
+
+ fwrite(&val, 1, 1, f);
+ }
+ }
+
+ return 0;
+}
--
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