Initial implementation of Serial support

+ refactor of the MIDI play, making separated loop functions instead the mess of everything in one single loop function.

1 files changed, 65 insertions, 0 deletions

diff --git a/src/chips/opl_serial_port.h b/src/chips/opl_serial_port.h
new file mode 100644
index 0000000..ec7bc39
--- /dev/null
+++ b/src/chips/opl_serial_port.h
@@ -0,0 +1,65 @@
+/*
+ * Interfaces over Yamaha OPL3 (YMF262) chip emulators
+ *
+ * Copyright (c) 2017-2023 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
+ */
+
+
+#ifndef OPL_SERIAL_PORT_H
+#define OPL_SERIAL_PORT_H
+
+#ifdef ENABLE_HW_OPL_SERIAL_PORT
+
+#include <string>
+#include "opl_chip_base.h"
+
+class ChipSerialPort;
+
+class OPL_SerialPort : public OPLChipBaseT<OPL_SerialPort>
+{
+public:
+    OPL_SerialPort();
+    virtual ~OPL_SerialPort() override;
+
+    enum Protocol
+    {
+        ProtocolUnknown,
+        ProtocolArduinoOPL2,
+        ProtocolNukeYktOPL3,
+        ProtocolRetroWaveOPL3
+    };
+
+    bool connectPort(const std::string &name, unsigned baudRate, unsigned protocol);
+
+    bool canRunAtPcmRate() const override { return false; }
+    void setRate(uint32_t /*rate*/) override {}
+    void reset() override {}
+    void writeReg(uint16_t addr, uint8_t data) override;
+    void nativePreGenerate() override {}
+    void nativePostGenerate() override {}
+    void nativeGenerate(int16_t *frame) override;
+    const char *emulatorName() override;
+    ChipType chipType() override;
+
+private:
+    ChipSerialPort *m_port;
+    int m_protocol;
+};
+
+#endif // ENABLE_HW_OPL_SERIAL_PORT
+
+#endif // OPL_SERIAL_PORT_H