Submit initial patch from FS#12176. Adds support for several new game music formats (AY, GBS, HES, KSS, SGC, VGM and VGZ) and replaces the current NSF and NSFE with a new implementation based on a port of the Game Music Emu library 'GME'. This first submit does not cover the full functionality provided by the author's original patch: Coleco-SGV is not supported, some GME-specific m3u-support has been removed and IRAM is not used yet. Further changes are very likely to follow this submit. Thanks to Mauricio Garrido.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30264 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 45 insertions, 0 deletions

diff --git a/apps/codecs/libgme/ym2413_emu.c b/apps/codecs/libgme/ym2413_emu.c
new file mode 100644
index 0000000000..67870f31dc
--- /dev/null
+++ b/apps/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, double sample_rate, double 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;

+        }

+}