1 files changed, 43 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libgme/sms_fm_apu.h b/lib/rbcodec/codecs/libgme/sms_fm_apu.h
new file mode 100644
index 0000000000..921db6cef1
--- /dev/null
+++ b/lib/rbcodec/codecs/libgme/sms_fm_apu.h
@@ -0,0 +1,43 @@
+#ifndef SMS_FM_APU_H
+#define SMS_FM_APU_H
+
+#include "blargg_common.h"
+#include "blip_buffer.h"
+#include "ym2413_emu.h"
+
+enum { fm_apu_osc_count = 1 };
+
+struct Sms_Fm_Apu {
+        struct Blip_Buffer* output_;
+        blip_time_t next_time;
+        int last_amp;
+        int addr;
+        
+        int clock_;
+        int rate_;
+        blip_time_t period_;
+        
+        struct Blip_Synth synth;
+        struct Ym2413_Emu apu;
+};
+
+void Fm_apu_create( struct Sms_Fm_Apu* this );
+
+static inline bool Fm_apu_supported( void ) { return Ym2413_supported(); }
+blargg_err_t Fm_apu_init( struct Sms_Fm_Apu* this, int clock_rate, int sample_rate );
+
+static inline void Fm_apu_set_output( struct Sms_Fm_Apu* this, struct Blip_Buffer* b )
+{
+        this->output_ = b;
+}
+
+static inline void Fm_apu_volume( struct Sms_Fm_Apu* this, int v ) { Synth_volume( &this->synth, (v*2) / 5 / 4096 ); }
+
+void Fm_apu_reset( struct Sms_Fm_Apu* this );
+
+static inline void Fm_apu_write_addr( struct Sms_Fm_Apu* this, int data )                 { this->addr = data; }
+void Fm_apu_write_data( struct Sms_Fm_Apu* this, blip_time_t, int data );
+
+void Fm_apu_end_frame( struct Sms_Fm_Apu* this, blip_time_t t );
+
+#endif