1 files changed, 63 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libgme/opl_apu.h b/lib/rbcodec/codecs/libgme/opl_apu.h
new file mode 100644
index 0000000000..76fa766492
--- /dev/null
+++ b/lib/rbcodec/codecs/libgme/opl_apu.h
@@ -0,0 +1,63 @@
+#ifndef OPL_APU_H
+#define OPL_APU_H
+
+#include "blargg_common.h"
+#include "blargg_source.h"
+#include "blip_buffer.h"
+
+#include "emu8950.h"
+#include "emu2413.h"
+
+enum opl_type_t { type_opll = 0x10, type_msxmusic = 0x11, type_smsfmunit = 0x12,
+                        type_vrc7 = 0x13, type_msxaudio = 0x21 };
+
+enum { opl_osc_count = 1 };
+
+struct Opl_Apu {
+        struct Blip_Buffer* output_;
+        enum opl_type_t type_;
+
+        blip_time_t next_time;
+        int last_amp;
+        int addr;
+        
+        long clock_;
+        long rate_;
+        blip_time_t period_;
+        
+        struct Blip_Synth synth;
+
+        // OPL chips
+        struct Y8950 opl;
+        OPLL opll;
+        
+        unsigned char regs[ 0x100 ];
+        unsigned char opl_memory[ 32768 ];
+};
+
+blargg_err_t Opl_init( struct Opl_Apu* this, long clock, long rate, blip_time_t period, enum opl_type_t type );
+void Opl_shutdown( struct Opl_Apu* this );
+
+void Opl_reset( struct Opl_Apu* this );
+static inline void Opl_volume( struct Opl_Apu* this, int v ) { Synth_volume( &this->synth, v / (4096 * 6) ); }
+
+static inline void Opl_osc_output( struct Opl_Apu* this, int i, struct Blip_Buffer* buf )
+{
+#if defined(ROCKBOX)
+        (void) i;
+#endif
+        assert( (unsigned) i < opl_osc_count );
+        this->output_ = buf;
+}
+
+static inline void Opl_set_output( struct Opl_Apu* this, struct Blip_Buffer* buf ) { Opl_osc_output( this, 0, buf ); }
+void Opl_end_frame( struct Opl_Apu* this, blip_time_t );
+
+static inline void Opl_write_addr( struct Opl_Apu* this, int data ) { this->addr = data; }
+void Opl_write_data( struct Opl_Apu* this, blip_time_t, int data );
+
+int Opl_read( struct Opl_Apu* this, blip_time_t, int port );
+
+static inline bool Opl_supported( void ) { return true; }
+
+#endif