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235 lines
8.8 KiB
C
235 lines
8.8 KiB
C
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/*
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* ModChannel.h
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* ------------
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* Purpose: Module Channel header class and helpers
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* Notes : (currently none)
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* Authors: 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 "ModSample.h"
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#include "ModInstrument.h"
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#include "modcommand.h"
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#include "Paula.h"
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#include "tuningbase.h"
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OPENMPT_NAMESPACE_BEGIN
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class CSoundFile;
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// Mix Channel Struct
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struct ModChannel
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{
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// Envelope playback info
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struct EnvInfo
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{
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uint32 nEnvPosition = 0;
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int16 nEnvValueAtReleaseJump = NOT_YET_RELEASED;
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FlagSet<EnvelopeFlags> flags;
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void Reset()
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{
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nEnvPosition = 0;
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nEnvValueAtReleaseJump = NOT_YET_RELEASED;
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}
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};
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// Information used in the mixer (should be kept tight for better caching)
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SamplePosition position; // Current play position (fixed point)
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SamplePosition increment; // Sample speed relative to mixing frequency (fixed point)
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const void *pCurrentSample; // Currently playing sample (nullptr if no sample is playing)
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int32 leftVol; // 0...4096 (12 bits, since 16 bits + 12 bits = 28 bits = 0dB in integer mixer, see MIXING_ATTENUATION)
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int32 rightVol; // Ditto
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int32 leftRamp; // Ramping delta, 20.12 fixed point (see VOLUMERAMPPRECISION)
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int32 rightRamp; // Ditto
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int32 rampLeftVol; // Current ramping volume, 20.12 fixed point (see VOLUMERAMPPRECISION)
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int32 rampRightVol; // Ditto
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mixsample_t nFilter_Y[2][2]; // Filter memory - two history items per sample channel
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mixsample_t nFilter_A0, nFilter_B0, nFilter_B1; // Filter coeffs
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mixsample_t nFilter_HP;
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SmpLength nLength;
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SmpLength nLoopStart;
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SmpLength nLoopEnd;
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FlagSet<ChannelFlags> dwFlags;
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mixsample_t nROfs, nLOfs;
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uint32 nRampLength;
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const ModSample *pModSample; // Currently assigned sample slot (may already be stopped)
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Paula::State paulaState;
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// Information not used in the mixer
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const ModInstrument *pModInstrument; // Currently assigned instrument slot
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SmpLength prevNoteOffset; // Offset for instrument-less notes for ProTracker/ScreamTracker
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SmpLength oldOffset; // Offset command memory
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FlagSet<ChannelFlags> dwOldFlags; // Flags from previous tick
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int32 newLeftVol, newRightVol;
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int32 nRealVolume, nRealPan;
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int32 nVolume, nPan, nFadeOutVol;
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int32 nPeriod; // Frequency in Hz if CSoundFile::PeriodsAreFrequencies() or using custom tuning, 4x Amiga periods otherwise
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int32 nC5Speed, nPortamentoDest;
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int32 cachedPeriod, glissandoPeriod;
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int32 nCalcVolume; // Calculated channel volume, 14-Bit (without global volume, pre-amp etc applied) - for MIDI macros
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EnvInfo VolEnv, PanEnv, PitchEnv; // Envelope playback info
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int32 nGlobalVol; // Channel volume (CV in ITTECH.TXT) 0...64
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int32 nInsVol; // Sample / Instrument volume (SV * IV in ITTECH.TXT) 0...64
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int32 nAutoVibDepth;
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uint32 nEFxOffset; // Offset memory for Invert Loop (EFx, .MOD only)
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ROWINDEX nPatternLoop;
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uint16 portamentoSlide;
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int16 nTranspose;
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int16 nFineTune;
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int16 microTuning; // Micro-tuning / MIDI pitch wheel command
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int16 nVolSwing, nPanSwing;
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int16 nCutSwing, nResSwing;
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uint16 nRestorePanOnNewNote; // If > 0, nPan should be set to nRestorePanOnNewNote - 1 on new note. Used to recover from pan swing and IT sample / instrument panning. High bit set = surround
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CHANNELINDEX nMasterChn;
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ModCommand rowCommand;
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// 8-bit members
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ResamplingMode resamplingMode;
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uint8 nRestoreResonanceOnNewNote; // See nRestorePanOnNewNote
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uint8 nRestoreCutoffOnNewNote; // ditto
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uint8 nNote;
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NewNoteAction nNNA;
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uint8 nLastNote; // Last note, ignoring note offs and cuts - for MIDI macros
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uint8 nArpeggioLastNote, nArpeggioBaseNote; // For plugin arpeggio
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uint8 nNewNote, nNewIns, nOldIns, nCommand, nArpeggio;
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uint8 nRetrigParam, nRetrigCount;
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uint8 nOldVolumeSlide, nOldFineVolUpDown;
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uint8 nOldPortaUp, nOldPortaDown, nOldFinePortaUpDown, nOldExtraFinePortaUpDown;
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uint8 nOldPanSlide, nOldChnVolSlide;
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uint8 nOldGlobalVolSlide;
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uint8 nAutoVibPos, nVibratoPos, nTremoloPos, nPanbrelloPos;
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uint8 nVibratoType, nVibratoSpeed, nVibratoDepth;
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uint8 nTremoloType, nTremoloSpeed, nTremoloDepth;
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uint8 nPanbrelloType, nPanbrelloSpeed, nPanbrelloDepth;
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int8 nPanbrelloOffset, nPanbrelloRandomMemory;
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uint8 nOldCmdEx, nOldVolParam, nOldTempo;
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uint8 nOldHiOffset;
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uint8 nCutOff, nResonance;
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uint8 nTremorCount, nTremorParam;
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uint8 nPatternLoopCount;
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uint8 nLeftVU, nRightVU;
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uint8 nActiveMacro;
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FilterMode nFilterMode;
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uint8 nEFxSpeed, nEFxDelay; // memory for Invert Loop (EFx, .MOD only)
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uint8 noteSlideParam, noteSlideCounter; // IMF / PTM Note Slide
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uint8 lastZxxParam; // Memory for \xx slides
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bool isFirstTick : 1; // Execute tick-0 effects on this channel? (condition differs between formats due to Pattern Delay commands)
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bool triggerNote : 1; // Trigger note on this tick on this channel if there is one?
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bool isPreviewNote : 1; // Notes preview in editor
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bool isPaused : 1; // Don't mix or increment channel position, but keep the note alive
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bool portaTargetReached : 1; // Tone portamento is finished
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//-->Variables used to make user-definable tuning modes work with pattern effects.
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//If true, freq should be recalculated in ReadNote() on first tick.
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//Currently used only for vibrato things - using in other context might be
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//problematic.
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bool m_ReCalculateFreqOnFirstTick : 1;
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//To tell whether to calculate frequency.
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bool m_CalculateFreq : 1;
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int32 m_PortamentoFineSteps, m_PortamentoTickSlide;
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//NOTE_PCs memory.
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float m_plugParamValueStep, m_plugParamTargetValue;
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uint16 m_RowPlugParam;
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PLUGINDEX m_RowPlug;
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void ClearRowCmd() { rowCommand = ModCommand(); }
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// Get a reference to a specific envelope of this channel
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const EnvInfo &GetEnvelope(EnvelopeType envType) const
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{
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switch(envType)
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{
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case ENV_VOLUME:
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default:
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return VolEnv;
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case ENV_PANNING:
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return PanEnv;
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case ENV_PITCH:
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return PitchEnv;
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}
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}
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EnvInfo &GetEnvelope(EnvelopeType envType)
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{
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return const_cast<EnvInfo &>(static_cast<const ModChannel *>(this)->GetEnvelope(envType));
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}
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void ResetEnvelopes()
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{
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VolEnv.Reset();
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PanEnv.Reset();
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PitchEnv.Reset();
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}
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enum ResetFlags
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{
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resetChannelSettings = 1, // Reload initial channel settings
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resetSetPosBasic = 2, // Reset basic runtime channel attributes
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resetSetPosAdvanced = 4, // Reset more runtime channel attributes
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resetSetPosFull = resetSetPosBasic | resetSetPosAdvanced | resetChannelSettings, // Reset all runtime channel attributes
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resetTotal = resetSetPosFull,
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};
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void Reset(ResetFlags resetMask, const CSoundFile &sndFile, CHANNELINDEX sourceChannel, ChannelFlags muteFlag);
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void Stop();
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bool IsSamplePlaying() const noexcept { return !increment.IsZero(); }
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uint32 GetVSTVolume() const noexcept { return (pModInstrument) ? pModInstrument->nGlobalVol * 4 : nVolume; }
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ModCommand::NOTE GetPluginNote(bool realNoteMapping) const;
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// Check if the channel has a valid MIDI output. A return value of true implies that pModInstrument != nullptr.
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bool HasMIDIOutput() const noexcept { return pModInstrument != nullptr && pModInstrument->HasValidMIDIChannel(); }
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// Check if the channel uses custom tuning. A return value of true implies that pModInstrument != nullptr.
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bool HasCustomTuning() const noexcept { return pModInstrument != nullptr && pModInstrument->pTuning != nullptr; }
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// Check if currently processed loop is a sustain loop. pModSample is not checked for validity!
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bool InSustainLoop() const noexcept { return (dwFlags & (CHN_LOOP | CHN_KEYOFF)) == CHN_LOOP && pModSample->uFlags[CHN_SUSTAINLOOP]; }
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void UpdateInstrumentVolume(const ModSample *smp, const ModInstrument *ins);
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void SetInstrumentPan(int32 pan, const CSoundFile &sndFile);
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void RestorePanAndFilter();
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void RecalcTuningFreq(Tuning::RATIOTYPE vibratoFactor, Tuning::NOTEINDEXTYPE arpeggioSteps, const CSoundFile &sndFile);
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// IT command S73-S7E
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void InstrumentControl(uint8 param, const CSoundFile &sndFile);
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int32 GetMIDIPitchBend() const noexcept { return (static_cast<int32>(microTuning) + 0x8000) / 4; }
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};
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// Default pattern channel settings
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struct ModChannelSettings
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{
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#ifdef MODPLUG_TRACKER
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static constexpr uint32 INVALID_COLOR = 0xFFFFFFFF;
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uint32 color = INVALID_COLOR; // For pattern editor
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#endif // MODPLUG_TRACKER
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FlagSet<ChannelFlags> dwFlags; // Channel flags
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uint16 nPan = 128; // Initial pan (0...256)
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uint16 nVolume = 64; // Initial channel volume (0...64)
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PLUGINDEX nMixPlugin = 0; // Assigned plugin
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mpt::charbuf<MAX_CHANNELNAME> szName; // Channel name
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void Reset()
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{
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*this = {};
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}
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};
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OPENMPT_NAMESPACE_END
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