Merge pull request #205 from jpcima/opal

support the Opal emulator

1 files changed, 76 insertions, 0 deletions

diff --git a/src/chips/opal_opl3.cpp b/src/chips/opal_opl3.cpp
new file mode 100644
index 0000000..895e7e0
--- /dev/null
+++ b/src/chips/opal_opl3.cpp
@@ -0,0 +1,76 @@
+/*
+ * Interfaces over Yamaha OPL3 (YMF262) chip emulators
+ *
+ * Copyright (c) 2017-2019 Vitaly Novichkov (Wohlstand)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "opal_opl3.h"
+#include "opal/opal.cpp"
+#include <new>
+#include <cstring>
+
+OpalOPL3::OpalOPL3() :
+    OPLChipBaseT()
+{
+    m_chip = new Opal(m_rate);
+    setRate(m_rate);
+}
+
+OpalOPL3::~OpalOPL3()
+{
+    Opal *chip_r = reinterpret_cast<Opal *>(m_chip);
+    delete chip_r;
+}
+
+void OpalOPL3::setRate(uint32_t rate)
+{
+    OPLChipBaseT::setRate(rate);
+    Opal *chip_r = reinterpret_cast<Opal *>(m_chip);
+    chip_r->~Opal();
+    new (chip_r) Opal(effectiveRate());
+}
+
+void OpalOPL3::reset()
+{
+    OPLChipBaseT::reset();
+    Opal *chip_r = reinterpret_cast<Opal *>(m_chip);
+    chip_r->~Opal();
+    new (chip_r) Opal(effectiveRate());
+}
+
+void OpalOPL3::writeReg(uint16_t addr, uint8_t data)
+{
+    Opal *chip_r = reinterpret_cast<Opal *>(m_chip);
+    chip_r->Port(addr, data);
+}
+
+void OpalOPL3::writePan(uint16_t addr, uint8_t data)
+{
+    //Opal *chip_r = reinterpret_cast<Opal *>(m_chip);
+    // TODO full panning
+}
+
+void OpalOPL3::nativeGenerate(int16_t *frame)
+{
+    Opal *chip_r = reinterpret_cast<Opal *>(m_chip);
+    chip_r->Sample(&frame[0], &frame[1]);
+}
+
+const char *OpalOPL3::emulatorName()
+{
+    return "Opal OPL3";
+}