A little proggy i wrote years ago.
authorMichael Niedermayer <michaelni@gmx.at>
Tue, 8 Jan 2008 00:54:19 +0000 (00:54 +0000)
committerMichael Niedermayer <michaelni@gmx.at>
Tue, 8 Jan 2008 00:54:19 +0000 (00:54 +0000)
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 [new file with mode: 0644]

diff --git a/tools/trasher.c b/tools/trasher.c
new file mode 100644 (file)
index 0000000..a9d2773
--- /dev/null
@@ -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;
+}