diff --git a/src/audio/BASSOPUS.java b/src/audio/BASSOPUS.java
index 539a906..ac3e834 100644
--- a/src/audio/BASSOPUS.java
+++ b/src/audio/BASSOPUS.java
@@ -3,6 +3,7 @@ package audio;
 import com.sun.jna.Library;
 import com.sun.jna.Native;
 import com.sun.jna.Pointer;
+import com.sun.jna.Structure;
 
 @SuppressWarnings("unused")
 public interface BASSOPUS extends Library {
@@ -13,8 +14,23 @@ public interface BASSOPUS extends Library {
     // Additional attributes
     int BASS_ATTRIB_OPUS_ORIGFREQ = 0x13000;
     int BASS_ATTRIB_OPUS_GAIN = 0x13001;
+    int BASS_STREAMPROC_OPUS_LOSS = 0x40000000;
 
-    int BASS_OPUS_StreamCreateFile(String file, long offset, long length, int flags);
+    @Structure.FieldOrder({ "version", "channels", "preskip", "inputrate", "gain", "mapping", "streams", "coupled", "chanmap" })
+    class BASS_OPUS_HEAD extends Structure{
+        byte version;
+        byte channels;
+        short  preskip;
+        int inputrate;
+        short gain;
+        byte mapping;
+        byte streams;
+        byte coupled;
+        byte[] chanmap = new byte[255];
+    }
+
+    int BASS_OPUS_StreamCreate(BASS_OPUS_HEAD head, int flags, Bass.STREAMPROC proc, Pointer user);int BASS_OPUS_StreamCreateFile(boolean mem, String file, long offset, long length, int flags);
     int BASS_OPUS_StreamCreateURL(String url, int offset, int flags, Bass.DOWNLOADPROC proc, Pointer user);
     int BASS_OPUS_StreamCreateFileUser(int system, int flags, Bass.BASS_FILEPROCS procs, Pointer user);
+    int BASS_OPUS_StreamPutData(int handle, Pointer buffer, int length);
 }