Move MIDI sequencer into completely separated class

TODO:
- implement C bindings for most of class functions
- test it in work on any different synthesizer

1 files changed, 153 insertions, 0 deletions

diff --git a/src/adlmidi_sequencer.cpp b/src/adlmidi_sequencer.cpp
new file mode 100644
index 0000000..8bc3569
--- /dev/null
+++ b/src/adlmidi_sequencer.cpp
@@ -0,0 +1,153 @@
+/*
+ * libADLMIDI is a free MIDI to WAV conversion library with OPL3 emulation
+ *
+ * Original ADLMIDI code: Copyright (c) 2010-2014 Joel Yliluoma <bisqwit@iki.fi>
+ * ADLMIDI Library API:   Copyright (c) 2015-2018 Vitaly Novichkov <admin@wohlnet.ru>
+ *
+ * Library is based on the ADLMIDI, a MIDI player for Linux and Windows with OPL3 emulation:
+ * http://iki.fi/bisqwit/source/adlmidi.html
+ *
+ * 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 3 of the License, or
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ADLMIDI_DISABLE_MIDI_SEQUENCER
+
+#include "adlmidi_private.hpp"
+
+// Inlucde MIDI sequencer class implementation
+#include "midi_sequencer_impl.hpp"
+
+
+/****************************************************
+ *           Real-Time MIDI calls proxies           *
+ ****************************************************/
+
+static void rtNoteOn(void *userdata, uint8_t channel, uint8_t note, uint8_t velocity)
+{
+    MIDIplay *context = reinterpret_cast<MIDIplay *>(userdata);
+    context->realTime_NoteOn(channel, note, velocity);
+}
+
+static void rtNoteOff(void *userdata, uint8_t channel, uint8_t note)
+{
+    MIDIplay *context = reinterpret_cast<MIDIplay *>(userdata);
+    context->realTime_NoteOff(channel, note);
+}
+
+static void rtNoteAfterTouch(void *userdata, uint8_t channel, uint8_t note, uint8_t atVal)
+{
+    MIDIplay *context = reinterpret_cast<MIDIplay *>(userdata);
+    context->realTime_NoteAfterTouch(channel, note, atVal);
+}
+
+static void rtChannelAfterTouch(void *userdata, uint8_t channel, uint8_t atVal)
+{
+    MIDIplay *context = reinterpret_cast<MIDIplay *>(userdata);
+    context->realTime_ChannelAfterTouch(channel, atVal);
+}
+
+static void rtControllerChange(void *userdata, uint8_t channel, uint8_t type, uint8_t value)
+{
+    MIDIplay *context = reinterpret_cast<MIDIplay *>(userdata);
+    context->realTime_Controller(channel, type, value);
+}
+
+static void rtPatchChange(void *userdata, uint8_t channel, uint8_t patch)
+{
+    MIDIplay *context = reinterpret_cast<MIDIplay *>(userdata);
+    context->realTime_PatchChange(channel, patch);
+}
+
+static void rtPitchBend(void *userdata, uint8_t channel, uint8_t msb, uint8_t lsb)
+{
+    MIDIplay *context = reinterpret_cast<MIDIplay *>(userdata);
+    context->realTime_PitchBend(channel, msb, lsb);
+}
+
+static void rtSysEx(void *userdata, const uint8_t *msg, size_t size)
+{
+    MIDIplay *context = reinterpret_cast<MIDIplay *>(userdata);
+    ADL_UNUSED(context);
+    ADL_UNUSED(msg);
+    ADL_UNUSED(size);
+    /* TODO: pass SysEx HERE! */
+}
+
+
+/* NonStandard calls */
+static void rtRawOPL(void *userdata, uint8_t reg, uint8_t value)
+{
+    MIDIplay *context = reinterpret_cast<MIDIplay *>(userdata);
+    return context->realTime_rawOPL(reg, value);
+}
+
+static void rtDeviceSwitch(void *userdata, size_t track, const char *data, size_t length)
+{
+    MIDIplay *context = reinterpret_cast<MIDIplay *>(userdata);
+    context->realTime_deviceSwitch(track, data, length);
+}
+
+static uint64_t rtCurrentDevice(void *userdata, size_t track)
+{
+    MIDIplay *context = reinterpret_cast<MIDIplay *>(userdata);
+    return context->realTime_currentDevice(track);
+}
+/* NonStandard calls End */
+
+
+void MIDIplay::initSequencerInterface()
+{
+    std::memset(&m_sequencerInterface, 0, sizeof(BW_MidiRtInterface));
+
+    m_sequencerInterface.onDebugMessage             = hooks.onDebugMessage;
+    m_sequencerInterface.onDebugMessage_userData    = hooks.onDebugMessage_userData;
+
+    /* MIDI Real-Time calls */
+    m_sequencerInterface.rtUserData = this;
+    m_sequencerInterface.rt_noteOn  = rtNoteOn;
+    m_sequencerInterface.rt_noteOff = rtNoteOff;
+    m_sequencerInterface.rt_noteAfterTouch = rtNoteAfterTouch;
+    m_sequencerInterface.rt_channelAfterTouch = rtChannelAfterTouch;
+    m_sequencerInterface.rt_controllerChange = rtControllerChange;
+    m_sequencerInterface.rt_patchChange = rtPatchChange;
+    m_sequencerInterface.rt_pitchBend = rtPitchBend;
+    m_sequencerInterface.rt_systemExclusive = rtSysEx;
+
+    /* NonStandard calls */
+    m_sequencerInterface.rt_rawOPL = rtRawOPL;
+    m_sequencerInterface.rt_deviceSwitch = rtDeviceSwitch;
+    m_sequencerInterface.rt_currentDevice = rtCurrentDevice;
+    /* NonStandard calls End */
+
+    m_sequencer.setInterface(&m_sequencerInterface);
+}
+
+double MIDIplay::Tick(double s, double granularity)
+{
+    double ret = m_sequencer.Tick(s, granularity);
+
+    s *= m_sequencer.getTempoMultiplier();
+    for(uint16_t c = 0; c < opl.NumChannels; ++c)
+        ch[c].AddAge(static_cast<int64_t>(s * 1000.0));
+
+    UpdateVibrato(s);
+    UpdateArpeggio(s);
+#if !defined(ADLMIDI_AUDIO_TICK_HANDLER)
+    UpdateGlide(s);
+#endif
+
+    return ret;
+}
+
+#endif /* ADLMIDI_DISABLE_MIDI_SEQUENCER */