1 files changed, 45 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libgme/ym2413_emu.c b/lib/rbcodec/codecs/libgme/ym2413_emu.c
new file mode 100644
index 0000000000..d9ada431ca
--- /dev/null
+++ b/lib/rbcodec/codecs/libgme/ym2413_emu.c
@@ -0,0 +1,45 @@
+// Game_Music_Emu 0.5.5. http://www.slack.net/~ant/
+
+#include "ym2413_emu.h"
+
+void Ym2413_init( struct Ym2413_Emu* this )
+{
+        this->last_time = disabled_time; this->out = 0; 
+}
+
+int Ym2413_set_rate( struct Ym2413_Emu* this, int sample_rate, int clock_rate )
+{       
+        OPLL_new ( &this->opll, clock_rate, sample_rate );
+    OPLL_reset_patch( &this->opll, OPLL_2413_TONE );
+    
+        Ym2413_reset( this );
+        return 0;
+}
+
+void Ym2413_reset( struct Ym2413_Emu* this )
+{
+        OPLL_reset( &this->opll );
+        OPLL_setMask( &this->opll, 0 );
+}
+
+void Ym2413_write( struct Ym2413_Emu* this, int addr, int data )
+{
+        OPLL_writeIO( &this->opll, 0, addr );
+        OPLL_writeIO( &this->opll, 1, data );
+}
+
+void Ym2413_mute_voices( struct Ym2413_Emu* this, int mask )
+{
+        OPLL_setMask( &this->opll, mask );
+}
+
+void Ym2413_run( struct Ym2413_Emu* this, int pair_count, short* out )
+{
+        while ( pair_count-- )
+        {
+                int s = OPLL_calc( &this->opll ) << 1;
+                out [0] = s;
+                out [1] = s;
+                out += 2;
+        }
+}