1 files changed, 51 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libgme/kss_scc_apu.h b/lib/rbcodec/codecs/libgme/kss_scc_apu.h
new file mode 100644
index 0000000000..a6962469ac
--- /dev/null
+++ b/lib/rbcodec/codecs/libgme/kss_scc_apu.h
@@ -0,0 +1,51 @@
+// Konami SCC sound chip emulator
+
+// Game_Music_Emu 0.6-pre
+#ifndef KSS_SCC_APU_H
+#define KSS_SCC_APU_H
+
+#include "blargg_common.h"
+#include "blip_buffer.h"
+
+enum { scc_reg_count = 0xB0 }; // 0 <= reg < reg_count
+enum { scc_osc_count = 5 };
+enum { scc_amp_range = 0x8000 };
+
+struct scc_osc_t
+{
+        int delay;
+        int phase;
+        int last_amp;
+        struct Blip_Buffer* output;
+};
+
+struct Scc_Apu {
+        struct scc_osc_t oscs [scc_osc_count];
+        blip_time_t last_time;
+        unsigned char regs [scc_reg_count];
+
+        struct Blip_Synth synth;
+};
+
+void Scc_init( struct Scc_Apu* this );
+
+// Resets sound chip
+void Scc_reset( struct Scc_Apu* this );
+
+// Set overall volume, where 1.0 is normal
+void Scc_volume( struct Scc_Apu* this, int v );
+
+static inline void Scc_set_output( struct Scc_Apu* this, int index, struct Blip_Buffer* b )
+{
+        assert( (unsigned) index < scc_osc_count );
+        this->oscs [index].output = b;
+}
+
+// Emulates to time t, then writes data to reg
+void Scc_write( struct Scc_Apu* this, blip_time_t time, int addr, int data );
+
+// Emulates to time t, then subtracts t from the current time.
+// OK if previous write call had time slightly after t.
+void Scc_end_frame( struct Scc_Apu* this, blip_time_t end_time );
+
+#endif