- Added getUserData for Decoder

Since Decoder and Encoder is similar, if the custom
onWrite and onSeek function requires user_data, the
Decoder.create() function might also need the user_data
because it also have its own callback for decoding
files.

Author: Logickin-Lambda

src/zaudio.c

@@ -808,6 +808,11 @@ void zaudioDecoderDestroy(
     s_mem.onFree(handle, s_mem.pUserData);
 }
 
+void* zaudioDecoderGetUserData(ma_decoder* handle) {
+    assert(handle != NULL);
+    return handle->pUserData;
+}
+
 //--------------------------------------------------------------------------------------------------
 void zaudioEncoderConfigInit(
     ma_encoding_format encoding_format, 

src/zaudio.zig

@@ -1047,6 +1047,9 @@ pub const Decoder = opaque {
         ) callconv(.c) void,
     };
 
+    pub const getUserData = zaudioDecoderGetUserData;
+    extern fn zaudioDecoderGetUserData(device: *const Encoder) ?*anyopaque;
+
     pub const Config = extern struct {
         format: Format,
         channels: u32,