diff --git a/Makefile.am b/Makefile.am
index d72ae55..63bddcc 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
 bin_PROGRAMS=tcfs
-tcfs_SOURCES=src/tcfs.c
+tcfs_SOURCES=src/tcfs.c src/transcode.c src/util.c
 tcfs_LDADD = $(LIBOBJS) $(FUSE_LIBS) $(libavcore_LIBS) $(libavutil_LIBS) $(libavformat_LIBS) $(libavcodec_LIBS)
 tcfs_CFLAGS = $(FUSE_CFLAGS) $(libavcore_CFLAGS) $(libavutil_CFLAGS) $(libavformat_CFLAGS) $(libavcodec_CFLAGS) -DFUSE_USE_VERSION=28
\ No newline at end of file
diff --git a/src/common.h b/src/common.h
index d7aa301..a49c224 100644
--- a/src/common.h
+++ b/src/common.h
@@ -58,4 +58,9 @@
 # include <dirent.h>
 #endif
 
+#include <libavcore/avcore.h>
+#include <libavutil/avutil.h>
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+
 #endif
diff --git a/src/tcfs.c b/src/tcfs.c
index 750bb43..972eb00 100644
--- a/src/tcfs.c
+++ b/src/tcfs.c
@@ -5,136 +5,13 @@
  */
 
 #include "common.h"
+#include "util.h"
+#include "transcode.h"
 
 #include <fuse.h>
 #include <fuse_opt.h>
 
-struct options {
-  char *base;
-  char *tfmt;
-} options;
-
-// Get the filename from a path, i.e. a pointer to the character after the last / in path.
-// If path contains no /, returns path.
-char *get_file_from_path(const char *path)
-{
-  if(!path)
-    return NULL;
-
-  char *ret = strchr(path, '/');
-  if(ret == NULL)
-    return path;
-
-  return ret+1;
-}
-
-// Get the extension from the file name
-char *get_ext_from_file(const char *file)
-{
-  if(!file)
-    return NULL;
-
-  char *ret = strchr(file, '.');
-  if(!ret)
-    return file+strlen(file);
-  if(ret == file)
-    return file+strlen(file); // return pointer to '\0';
-  
-  return ret+1;
-}
-
-char *strip_ext_from_path(const char *path)
-{
-  if(!path)
-    return NULL;
-
-  char *ret = strdup(path);
-
-  char *ext = strchr(ret, '.');
-  char *file = strchr(ret, '/');
-  if(!ext || (ext<file)) // no . or . not in last component
-    return ret;
-  
-  *ext = '\0';
-  return ret;
-}
-
-// returns 1 if the file is a transcodeable audio file, 0 if it is not and a negative value if an error occured
-int is_tc_audio_file(const char *path)
-{
-  if(!path)
-    return -EINVAL;
-
-  struct stat st;
-  int ret = stat(path, &st);
-  if(ret == -1)
-    return -errno;
-  
-  if(!S_ISREG(st.st_mode))
-    return 0;
-
-  char *file = get_file_from_path(path);
-  if(!file || (file[0] == '\0'))
-    return 0;
-
-  char *ext = get_ext_from_file(file);
-  if(!ext)
-    return 0;
-  
-  if(strcmp(ext,options.tfmt) == 0)
-    return 0; // file already has right format
-
-  // TODO: proper detection code here
-
-  // for testing
-  if(strcmp(ext,"ogg") == 0)
-    return 1;
-
-  return 0;
-}
-
-// Get the path of the transcodeable audio file that
-// generates 'path'. Returns NULL when there is no such
-// file.
-char *get_tc_source_name(const char *path)
-{
-  if(!path)
-    return NULL;
-
-  if(strcmp(get_ext_from_file(get_file_from_path(path)), options.tfmt)!=0) {
-    return NULL;
-  }
-
-  char *path_no_ext = strip_ext_from_path(path);
-  if(!path_no_ext)
-    return NULL;
-
-  // TODO : search for transcodable files in path_no_ext.*
-
-  // for testing
-  char *ret;
-  if(asprintf(&ret, "%s.ogg", path_no_ext) < 0)
-    return NULL;
-
-  return ret;
-}
-
-// safely concatenate options.base and path
-// the caller must free() the returned string
-char *path_cat(const char *path)
-{
-  if(!path)
-    return NULL;
-
-  char *ret = (char*)malloc(strlen(options.base)+strlen(path)+1);
-  if(!ret)
-    return NULL;
-
-  memcpy(ret, options.base, strlen(options.base));
-  memcpy(ret+strlen(options.base), path, strlen(path)+1);
-
-  return ret;
-}
+struct options options;
 
 int tcfs_getattr(const char *path, struct stat *stbuf)
 {
@@ -364,5 +241,7 @@ int main(int argc, char *argv[])
     options.tfmt = "mp3";
   }
 
+  av_register_all();
+
   return fuse_main(args.argc, args.argv, &tcfs_oper, NULL);
 }
diff --git a/src/transcode.c b/src/transcode.c
new file mode 100644
index 0000000..eecd888
--- /dev/null
+++ b/src/transcode.c
@@ -0,0 +1,21 @@
+/*
+ Copyright (c) 2010 Matthias Blankertz <matthias@blankertz.org>
+
+ This work is licensed under the Open Software License ("OSL") v. 3.0.
+ */
+
+#include "common.h"
+
+struct TC_FILE {
+};
+
+struct TC_FILE *tc_open(const char *src, const char *tfmt)
+{
+  return NULL;
+}
+
+int tc_read(char *buf, size_t size, struct TC_FILE *fd)
+{
+  errno = ENOSYS;
+  return 0;
+}
diff --git a/src/transcode.h b/src/transcode.h
new file mode 100644
index 0000000..a63d743
--- /dev/null
+++ b/src/transcode.h
@@ -0,0 +1,15 @@
+/*
+ Copyright (c) 2010 Matthias Blankertz <matthias@blankertz.org>
+
+ This work is licensed under the Open Software License ("OSL") v. 3.0.
+ */
+
+#ifndef TCFS_TRANSCODE_H
+#define TCFS_TRANSCODE_H 1
+
+struct TC_FILE;
+
+struct TC_FILE *tc_open(const char *src, const char *tfmt);
+int tc_read(char *buf, size_t size, struct TC_FILE *fd);
+
+#endif
diff --git a/src/util.c b/src/util.c
new file mode 100644
index 0000000..62adfd1
--- /dev/null
+++ b/src/util.c
@@ -0,0 +1,130 @@
+/*
+ Copyright (c) 2010 Matthias Blankertz <matthias@blankertz.org>
+
+ This work is licensed under the Open Software License ("OSL") v. 3.0.
+ */
+
+#include "common.h"
+#include "util.h"
+
+// Get the filename from a path, i.e. a pointer to the character after the last / in path.
+// If path contains no /, returns path.
+const char *get_file_from_path(const char *path)
+{
+  if(!path)
+    return NULL;
+
+  char *ret = strchr(path, '/');
+  if(ret == NULL)
+    return path;
+
+  return ret+1;
+}
+
+// Get the extension from the file name
+const char *get_ext_from_file(const char *file)
+{
+  if(!file)
+    return NULL;
+
+  char *ret = strchr(file, '.');
+  if(!ret)
+    return file+strlen(file);
+  if(ret == file)
+    return file+strlen(file); // return pointer to '\0';
+  
+  return ret+1;
+}
+
+char *strip_ext_from_path(const char *path)
+{
+  if(!path)
+    return NULL;
+
+  char *ret = strdup(path);
+
+  char *ext = strchr(ret, '.');
+  char *file = strchr(ret, '/');
+  if(!ext || (ext<file)) // no . or . not in last component
+    return ret;
+  
+  *ext = '\0';
+  return ret;
+}
+
+// returns 1 if the file is a transcodeable audio file, 0 if it is not and a negative value if an error occured
+int is_tc_audio_file(const char *path)
+{
+  if(!path)
+    return -EINVAL;
+
+  struct stat st;
+  int ret = stat(path, &st);
+  if(ret == -1)
+    return -errno;
+  
+  if(!S_ISREG(st.st_mode))
+    return 0;
+
+  const char *file = get_file_from_path(path);
+  if(!file || (file[0] == '\0'))
+    return 0;
+
+  const char *ext = get_ext_from_file(file);
+  if(!ext)
+    return 0;
+  
+  if(strcmp(ext,options.tfmt) == 0)
+    return 0; // file already has right format
+
+  // TODO: proper detection code here
+
+  // for testing
+  if(strcmp(ext,"ogg") == 0)
+    return 1;
+
+  return 0;
+}
+
+// Get the path of the transcodeable audio file that
+// generates 'path'. Returns NULL when there is no such
+// file.
+char *get_tc_source_name(const char *path)
+{
+  if(!path)
+    return NULL;
+
+  if(strcmp(get_ext_from_file(get_file_from_path(path)), options.tfmt)!=0) {
+    return NULL;
+  }
+
+  char *path_no_ext = strip_ext_from_path(path);
+  if(!path_no_ext)
+    return NULL;
+
+  // TODO : search for transcodable files in path_no_ext.*
+
+  // for testing
+  char *ret;
+  if(asprintf(&ret, "%s.ogg", path_no_ext) < 0)
+    return NULL;
+
+  return ret;
+}
+
+// safely concatenate options.base and path
+// the caller must free() the returned string
+char *path_cat(const char *path)
+{
+  if(!path)
+    return NULL;
+
+  char *ret = (char*)malloc(strlen(options.base)+strlen(path)+1);
+  if(!ret)
+    return NULL;
+
+  memcpy(ret, options.base, strlen(options.base));
+  memcpy(ret+strlen(options.base), path, strlen(path)+1);
+
+  return ret;
+}
diff --git a/src/util.h b/src/util.h
new file mode 100644
index 0000000..554fd42
--- /dev/null
+++ b/src/util.h
@@ -0,0 +1,24 @@
+/*
+ Copyright (c) 2010 Matthias Blankertz <matthias@blankertz.org>
+
+ This work is licensed under the Open Software License ("OSL") v. 3.0.
+ */
+
+#ifndef TCFS_UTIL_H
+#define TCFS_UTIL_H 1
+
+struct options {
+  char *base;
+  char *tfmt;
+};
+
+extern struct options options;
+
+const char *get_file_from_path(const char *path);
+const char *get_ext_from_file(const char *file);
+char *strip_ext_from_path(const char *path);
+int is_tc_audio_file(const char *path);
+char *get_tc_source_name(const char *path);
+char *path_cat(const char *path);
+
+#endif