Work on J2DMaterialFactory (#394)

* Work on J2DMaterialFactory

* J3DUClipper OK

* Work on JAISoundStarter

* JAISoundHandles OK

* JAISoundInfo OK

* Fix JAISound::isStopping

* Work on J2DTextBoxEx

* dspproc OK

* osdsp OK

* osdsp_task OK

* Work on dsptask

* Import some JASCalc code

* JASCallback OK

* JASOscillator OK

* JASLfo OK

include/JSystem/JAudio2/osdsp_task.h

@@ -2,5 +2,20 @@
 #define OSDSP_TASK_H
 
 #include "dolphin/types.h"
+#include "dolphin/os/OSInterrupt.h"
+
+struct DSPTaskInfo;
+
+extern DSPTaskInfo* DSP_prior_task;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void __DSPHandler(OSInterrupt interrupt, OSContext* context);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* OSDSP_TASK_H */