1 files changed, 62 insertions, 0 deletions

diff --git a/apps/codecs/libgme/opl_apu.h b/apps/codecs/libgme/opl_apu.h
new file mode 100644
index 0000000000..3f5a751976
--- /dev/null
+++ b/apps/codecs/libgme/opl_apu.h
@@ -0,0 +1,62 @@
+#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_reset( struct Opl_Apu* this );

+static inline void Opl_volume( struct Opl_Apu* this, double v ) { Synth_volume( &this->synth, 1.0 / (4096 * 6) * v ); }

+        

+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 ) ICODE_ATTR;

+

+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 ) ICODE_ATTR;

+

+int Opl_read( struct Opl_Apu* this, blip_time_t, int port ) ICODE_ATTR;

+

+static inline bool Opl_supported( void ) { return true; }

+

+#endif