mirror of
https://github.com/dwhinham/mt32-pi.git
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87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
//
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// midimonitor.h
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//
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// mt32-pi - A baremetal MIDI synthesizer for Raspberry Pi
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// Copyright (C) 2020-2023 Dale Whinham <daleyo@gmail.com>
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//
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// This file is part of mt32-pi.
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//
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// mt32-pi is free software: you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the Free Software
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// Foundation, either version 3 of the License, or (at your option) any later
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// version.
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//
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// mt32-pi is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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// details.
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//
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// You should have received a copy of the GNU General Public License along with
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// mt32-pi. If not, see <http://www.gnu.org/licenses/>.
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//
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#ifndef _midimonitor_h
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#define _midimonitor_h
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#include <circle/types.h>
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#include "utility.h"
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class CMIDIMonitor
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{
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public:
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CMIDIMonitor();
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void OnShortMessage(u32 nMessage);
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void GetChannelLevels(unsigned int nTicks, float* pOutLevels, float* pOutPeaks, u16 nPercussionBitMask = (1 << 9));
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void AllNotesOff();
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void ResetControllers(bool bIsResetAllControllers);
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private:
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static constexpr u8 ChannelCount = 16;
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static constexpr u8 NoteCount = 127;
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static constexpr float AttackTimeMillis = 20.0f;
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static constexpr float DecayTimeMillis = 100.0f;
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static constexpr float SustainLevel = 0.8f;
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static constexpr float ReleaseTimeMillis = 150.0f;
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static constexpr float PeakHoldTimeMillis = 2000.0f;
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static constexpr float PeakFalloffTimeMillis = 1000.0f;
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enum class TEnvelopePhase
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{
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Idle,
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NoteOn,
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NoteOff,
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};
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struct TNoteState
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{
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TEnvelopePhase EnvelopePhase;
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unsigned int nNoteOnTime;
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unsigned int nNoteOffTime;
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u8 nVelocity;
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bool bDamperFlag;
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};
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struct TChannelState
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{
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u8 nVolume;
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u8 nExpression;
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u8 nPan;
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u8 nDamper;
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TNoteState Notes[NoteCount];
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};
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void ProcessCC(u8 nChannel, u8 nCC, u8 nValue, unsigned int nTicks);
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inline float ComputeEnvelope(TNoteState& NoteState) const;
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inline float ComputePercussionEnvelope(TNoteState& NoteState) const;
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TChannelState m_State[ChannelCount];
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float m_PeakLevels[ChannelCount];
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unsigned int m_PeakTimes[ChannelCount];
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};
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#endif
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