From 323f297aded859c4c042eb43ce1e595034bb2527 Mon Sep 17 00:00:00 2001
From: Björn Stenberg <bjorn@haxx.se>
Date: Thu, 19 Dec 2002 15:00:40 +0000
Subject: Added incomplete support for the FM Recorder header

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3030 a1c6a512-1295-4272-9138-f99709370657
---
 tools/scramble.c | 62 +++++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 46 insertions(+), 16 deletions(-)

(limited to 'tools/scramble.c')

diff --git a/tools/scramble.c b/tools/scramble.c
index 5b59cf3d64..a5c8caea3e 100644
--- a/tools/scramble.c
+++ b/tools/scramble.c
@@ -25,18 +25,27 @@ int main (int argc, char** argv)
     unsigned long length,i,slen;
     unsigned char *inbuf,*outbuf;
     unsigned short crc=0;
-    unsigned char header[6];
+    unsigned char header[24];
+    unsigned char *iname = argv[1];
+    unsigned char *oname = argv[2];
+    int headerlen = 6;
     FILE* file;
 
     if (argc < 3) {
-       printf("usage: %s <input file> <output file>\n",argv[0]);
+       printf("usage: %s [-fm] <input file> <output file>\n",argv[0]);
        return -1;
     }
+
+    if (argv[1][0] == '-') { /* assume any parameter is -fm :-) */
+        headerlen = 24;
+        iname = argv[2];
+        oname = argv[3];
+    }
     
     /* open file */
-    file = fopen(argv[1],"rb");
+    file = fopen(iname,"rb");
     if (!file) {
-       perror(argv[1]);
+       perror(iname);
        return -1;
     }
     fseek(file,0,SEEK_END);
@@ -52,7 +61,7 @@ int main (int argc, char** argv)
     /* read file */
     i=fread(inbuf,1,length,file);
     if ( !i ) {
-       perror(argv[1]);
+       perror(iname);
        return -1;
     }
     fclose(file);
@@ -71,25 +80,46 @@ int main (int argc, char** argv)
        crc += inbuf[i];
 
     /* make header */
-    header[0] = (length >> 24) & 0xff;
-    header[1] = (length >> 16) & 0xff;
-    header[2] = (length >> 8) & 0xff;
-    header[3] = length & 0xff;
-    header[4] = (crc >> 8) & 0xff;
-    header[5] = crc & 0xff;
+    memset(header, 0, sizeof header);
+    if (headerlen == 6) {
+        header[0] = (length >> 24) & 0xff;
+        header[1] = (length >> 16) & 0xff;
+        header[2] = (length >> 8) & 0xff;
+        header[3] = length & 0xff;
+        header[4] = (crc >> 8) & 0xff;
+        header[5] = crc & 0xff;
+    }
+    else {
+        header[0] =
+            header[1] =
+            header[2] =
+            header[3] = 0xff; /* ??? */
+            
+        header[6] = (crc >> 8) & 0xff;
+        header[7] = crc & 0xff;
+
+        header[11] = 4; /* ??? */
+
+        header[15] = headerlen; /* really? */
+
+        header[20] = (length >> 24) & 0xff;
+        header[21] = (length >> 16) & 0xff;
+        header[22] = (length >> 8) & 0xff;
+        header[23] = length & 0xff;
+    }
 
     /* write file */
-    file = fopen(argv[2],"wb");
+    file = fopen(oname,"wb");
     if ( !file ) {
-       perror(argv[2]);
+       perror(oname);
        return -1;
     }
-    if ( !fwrite(header,6,1,file) ) {
-       perror(argv[2]);
+    if ( !fwrite(header,headerlen,1,file) ) {
+       perror(oname);
        return -1;
     }
     if ( !fwrite(outbuf,length,1,file) ) {
-       perror(argv[2]);
+       perror(oname);
        return -1;
     }
     fclose(file);
-- 
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