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232 lines
6.9 KiB
C++
232 lines
6.9 KiB
C++
/*
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* MidiInOut.h
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* -----------
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* Purpose: A plugin for sending and receiving MIDI data.
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* Notes : (currently none)
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* Authors: Johannes Schultz (OpenMPT Devs)
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#pragma once
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#include "openmpt/all/BuildSettings.hpp"
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#include "mpt/mutex/mutex.hpp"
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#include "../../common/mptTime.h"
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#include "../../soundlib/plugins/PlugInterface.h"
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#include <rtmidi/RtMidi.h>
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#include <array>
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#include <deque>
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OPENMPT_NAMESPACE_BEGIN
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class MidiDevice
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{
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public:
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using ID = decltype(RtMidiIn().getPortCount());
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static constexpr ID NO_MIDI_DEVICE = ID(-1);
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RtMidi &stream;
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std::string name; // Charset::UTF8
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ID index = NO_MIDI_DEVICE;
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public:
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MidiDevice(RtMidi &stream)
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: stream(stream)
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, name("<none>")
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{ }
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std::string GetPortName(ID port); // Charset::UTF8
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};
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class MidiInOut final : public IMidiPlugin
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{
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friend class MidiInOutEditor;
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protected:
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enum
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{
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kInputParameter = 0,
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kOutputParameter = 1,
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kNumPrograms = 1,
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kNumParams = 2,
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kNoDevice = MidiDevice::NO_MIDI_DEVICE,
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kMaxDevices = 65536, // Should be a power of 2 to avoid rounding errors.
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};
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// MIDI queue entry with small storage optimiziation.
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// This optimiziation is going to be used for all messages that OpenMPT can send internally,
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// but SysEx messages received from other plugins may be longer.
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class Message
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{
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public:
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double m_time;
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size_t m_size;
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unsigned char *m_message = nullptr;
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protected:
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std::array<unsigned char, 32> m_msgSmall;
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public:
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Message(double time, const void *data, size_t size)
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: m_time(time)
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, m_size(size)
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{
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if(size > m_msgSmall.size())
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m_message = new unsigned char[size];
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else
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m_message = m_msgSmall.data();
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std::memcpy(m_message, data, size);
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}
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Message(const Message &) = delete;
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Message & operator=(const Message &) = delete;
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Message(double time, unsigned char msg) noexcept : Message(time, &msg, 1) { }
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Message(Message &&other) noexcept
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: m_time(other.m_time)
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, m_size(other.m_size)
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, m_message(other.m_message)
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, m_msgSmall(other.m_msgSmall)
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{
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other.m_message = nullptr;
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if(m_size <= m_msgSmall.size())
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m_message = m_msgSmall.data();
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}
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~Message()
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{
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if(m_size > m_msgSmall.size())
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delete[] m_message;
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}
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Message& operator= (Message &&other) noexcept
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{
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m_time = other.m_time;
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m_size = other.m_size;
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m_message = (m_size <= m_msgSmall.size()) ? m_msgSmall.data() : other.m_message;
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m_msgSmall = other.m_msgSmall;
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other.m_message = nullptr;
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return *this;
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}
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};
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std::string m_chunkData; // Storage for GetChunk
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std::deque<Message> m_outQueue; // Latency-compensated output
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std::vector<unsigned char> m_bufferedInput; // For receiving long SysEx messages
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mpt::mutex m_mutex;
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double m_nextClock = 0.0; // Remaining samples until next MIDI clock tick should be sent
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double m_latency = 0.0; // User-adjusted latency in seconds
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// I/O device settings
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Util::MultimediaClock m_clock;
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RtMidiIn m_midiIn;
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RtMidiOut m_midiOut;
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MidiDevice m_inputDevice;
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MidiDevice m_outputDevice;
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bool m_sendTimingInfo = true;
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#ifdef MODPLUG_TRACKER
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CString m_programName;
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#endif
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public:
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static IMixPlugin* Create(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
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MidiInOut(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
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~MidiInOut();
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// Translate a VST parameter to an RtMidi device ID
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static MidiDevice::ID ParameterToDeviceID(float value)
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{
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return static_cast<MidiDevice::ID>(value * static_cast<float>(kMaxDevices)) - 1;
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}
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// Translate a RtMidi device ID to a VST parameter
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static float DeviceIDToParameter(MidiDevice::ID index)
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{
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return static_cast<float>(index + 1) / static_cast<float>(kMaxDevices);
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}
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/////////////////////////////////////////////////
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// Destroy the plugin
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void Release() final { delete this; }
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int32 GetUID() const final { return 'MMID'; }
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int32 GetVersion() const final { return 2; }
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void Idle() final { }
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uint32 GetLatency() const final;
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int32 GetNumPrograms() const final { return kNumPrograms; }
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int32 GetCurrentProgram() final { return 0; }
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void SetCurrentProgram(int32) final { }
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PlugParamIndex GetNumParameters() const final { return kNumParams; }
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void SetParameter(PlugParamIndex paramindex, PlugParamValue paramvalue) final;
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PlugParamValue GetParameter(PlugParamIndex nIndex) final;
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// Save parameters for storing them in a module file
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void SaveAllParameters() final;
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// Restore parameters from module file
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void RestoreAllParameters(int32 program) final;
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void Process(float *pOutL, float *pOutR, uint32 numFrames) final;
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// Render silence and return the highest resulting output level
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float RenderSilence(uint32) final{ return 0; }
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bool MidiSend(uint32 midiCode) final;
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bool MidiSysexSend(mpt::const_byte_span sysex) final;
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void HardAllNotesOff() final;
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// Modify parameter by given amount. Only needs to be re-implemented if plugin architecture allows this to be performed atomically.
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void Resume() final;
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void Suspend() final;
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// Tell the plugin that there is a discontinuity between the previous and next render call (e.g. aftert jumping around in the module)
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void PositionChanged() final;
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void Bypass(bool bypass = true) final;
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bool IsInstrument() const final { return true; }
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bool CanRecieveMidiEvents() final { return true; }
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// If false is returned, mixing this plugin can be skipped if its input are currently completely silent.
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bool ShouldProcessSilence() final { return true; }
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#ifdef MODPLUG_TRACKER
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CString GetDefaultEffectName() final { return _T("MIDI Input / Output"); }
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CString GetParamName(PlugParamIndex param) final;
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CString GetParamLabel(PlugParamIndex) final{ return CString(); }
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CString GetParamDisplay(PlugParamIndex param) final;
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CString GetCurrentProgramName() final { return m_programName; }
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void SetCurrentProgramName(const CString &name) final { m_programName = name; }
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CString GetProgramName(int32) final { return m_programName; }
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virtual CString GetPluginVendor() { return _T("OpenMPT Project"); }
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bool HasEditor() const final { return true; }
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protected:
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CAbstractVstEditor *OpenEditor() final;
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#endif
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public:
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int GetNumInputChannels() const final { return 0; }
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int GetNumOutputChannels() const final { return 0; }
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bool ProgramsAreChunks() const final { return true; }
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ChunkData GetChunk(bool isBank) final;
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void SetChunk(const ChunkData &chunk, bool isBank) final;
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protected:
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// Open a device for input or output.
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void OpenDevice(MidiDevice::ID newDevice, bool asInputDevice);
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// Close an active device.
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void CloseDevice(MidiDevice &device);
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static void InputCallback(double deltatime, std::vector<unsigned char> *message, void *userData) { static_cast<MidiInOut *>(userData)->InputCallback(deltatime, *message); }
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void InputCallback(double deltatime, std::vector<unsigned char> &message);
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// Calculate the current output timestamp
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double GetOutputTimestamp() const;
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};
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OPENMPT_NAMESPACE_END
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