1 files changed, 96 insertions, 0 deletions
diff --git a/sid/sidplay-libs-2.1.0/libsidplay/src/c64/c64xsid.h b/sid/sidplay-libs-2.1.0/libsidplay/src/c64/c64xsid.h
new file mode 100644
index 00000000..e8385adb
--- /dev/null
+++ b/sid/sidplay-libs-2.1.0/libsidplay/src/c64/c64xsid.h
@@ -0,0 +1,96 @@
+/***************************************************************************
+                          c64sid.h  -  ReSid Wrapper
+                             -------------------
+    begin                : Fri Apr 4 2001
+    copyright            : (C) 2001 by Simon White
+    email                : s_a_white@email.com
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+/* This file could be a specialisation of a sid implementation.
+ * However since the sid emulation is not part of this project
+ * we are actually creating a wrapper instead.
+ */
+
+#include "c64env.h"
+#include "sidbuilder.h"
+#include "../xsid/xsid.h"
+
+class c64xsid: public XSID
+{
+private:
+    c64env        &m_env;
+    sidemu        *m_sid;
+    int_least32_t  m_gain;
+
+private:
+    uint8_t readMemByte  (uint_least16_t addr)
+    {return m_env.readMemRamByte (addr);}
+    void    writeMemByte (uint8_t data)
+    {m_sid->write (0x18, data);}
+
+public:
+    c64xsid (c64env *env, sidemu *sid)
+    :XSID(&env->context ()),
+     m_env(*env), m_sid(sid), m_gain(100)
+    {;}
+    
+    // Standard component interface
+    const char *error (void) {return "";}
+    void reset () { sidemu::reset (); }
+    void reset (uint8_t volume)
+    {
+        XSID::reset  (volume);
+        m_sid->reset (volume);
+    }
+
+    uint8_t read (uint_least8_t addr)
+    {   return m_sid->read (addr); }
+
+    void write (uint_least8_t addr, uint8_t data)
+    {
+        if (addr == 0x18)
+            XSID::storeSidData0x18 (data);
+        else
+            m_sid->write (addr, data);
+    }
+
+    void write16 (uint_least16_t addr, uint8_t data)
+    {
+        XSID::write (addr, data);
+    }
+
+    // Standard SID interface
+    int_least32_t output (uint_least8_t bits)
+    {   return m_sid->output (bits) + (XSID::output (bits) * m_gain / 100); }
+
+    void voice (uint_least8_t num, uint_least8_t vol,
+                bool mute)
+    {
+        if (num == 3)
+            XSID::mute (mute);
+        else
+            m_sid->voice (num, vol, mute);
+    }
+
+    void gain (int_least8_t percent)
+    {
+        // 0 to 99 is loss, 101 - 200 is gain
+        m_gain  = percent;
+        m_gain += 100;
+        if (m_gain > 200)
+            m_gain = 200;
+    }
+
+    // Xsid specific
+    void emulation (sidemu *sid) {m_sid = sid;}
+    sidemu *emulation (void) { return m_sid; }
+};