1 files changed, 8 insertions, 0 deletions
diff --git a/src/audiofile.cc b/src/audiofile.cc
index 3f0bd82..5a9cdb5 100644
--- a/src/audiofile.cc
+++ b/src/audiofile.cc
@@ -42,15 +42,23 @@ AudioFile::AudioFile(std::string filename)
   data = NULL;
   size = 0;
 
+  magic = this;
+
   //load();
 }
 
 AudioFile::~AudioFile()
 {
+  magic = NULL;
   //printf("delete AudioFile %p\n", this);
   unload();
 }
 
+bool AudioFile::isValid()
+{
+  return this == magic;
+}
+
 void AudioFile::unload()
 {
   if(data) {