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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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* Copyright (C) 2005, 2006 Christian Schoenebeck * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#ifndef __LS_GIG_VOICE_H__ |
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#define __LS_GIG_VOICE_H__ |
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|
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#include "../../common/global.h" |
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|
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#include <gig.h> |
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|
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#include "../../common/RTMath.h" |
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#include "../../common/RingBuffer.h" |
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#include "../../common/Pool.h" |
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#include "../../drivers/audio/AudioOutputDevice.h" |
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#include "../common/BiquadFilter.h" |
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#include "Engine.h" |
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#include "EngineChannel.h" |
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#include "Stream.h" |
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#include "DiskThread.h" |
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#include "EGADSR.h" |
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#include "EGDecay.h" |
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#include "Filter.h" |
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#include "../common/LFOBase.h" |
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#include "SynthesisParam.h" |
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#include "SmoothVolume.h" |
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|
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// include the appropriate (unsigned) triangle LFO implementation |
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#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION |
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# include "../common/LFOTriangleIntMath.h" |
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#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION |
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# include "../common/LFOTriangleIntAbsMath.h" |
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#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION |
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# include "../common/LFOTriangleDiHarmonic.h" |
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#else |
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# error "Unknown or no (unsigned) triangle LFO implementation selected!" |
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#endif |
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|
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// include the appropriate (signed) triangle LFO implementation |
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#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION |
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# include "../common/LFOTriangleIntMath.h" |
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#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION |
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# include "../common/LFOTriangleIntAbsMath.h" |
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#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION |
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# include "../common/LFOTriangleDiHarmonic.h" |
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#else |
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# error "Unknown or no (signed) triangle LFO implementation selected!" |
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#endif |
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|
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namespace LinuxSampler { namespace gig { |
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|
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class Engine; |
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|
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/// Reflects a MIDI controller |
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struct midi_ctrl { |
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uint8_t controller; ///< MIDI control change controller number |
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uint8_t value; ///< Current MIDI controller value |
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float fvalue; ///< Transformed / effective value (e.g. volume level or filter cutoff frequency) |
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}; |
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|
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#if CONFIG_UNSIGNED_TRIANG_ALGO == INT_MATH_SOLUTION |
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typedef LFOTriangleIntMath<range_unsigned> LFOUnsigned; |
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#elif CONFIG_UNSIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION |
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typedef LFOTriangleIntAbsMath<range_unsigned> LFOUnsigned; |
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#elif CONFIG_UNSIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION |
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typedef LFOTriangleDiHarmonic<range_unsigned> LFOUnsigned; |
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#endif |
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|
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#if CONFIG_SIGNED_TRIANG_ALGO == INT_MATH_SOLUTION |
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typedef LFOTriangleIntMath<range_signed> LFOSigned; |
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#elif CONFIG_SIGNED_TRIANG_ALGO == INT_ABS_MATH_SOLUTION |
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typedef LFOTriangleIntAbsMath<range_signed> LFOSigned; |
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#elif CONFIG_SIGNED_TRIANG_ALGO == DI_HARMONIC_SOLUTION |
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typedef LFOTriangleDiHarmonic<range_signed> LFOSigned; |
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#endif |
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|
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/** Gig Voice |
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* |
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* Renders a voice for the Gigasampler format. |
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*/ |
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class Voice { |
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public: |
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// Types |
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enum type_t { |
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type_normal, |
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type_release_trigger_required, ///< If the key of this voice will be released, it causes a release triggered voice to be spawned |
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type_release_trigger ///< Release triggered voice which cannot be killed by releasing its key |
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}; |
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|
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// Attributes |
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type_t Type; ///< Voice Type |
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int MIDIKey; ///< MIDI key number of the key that triggered the voice |
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uint KeyGroup; |
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DiskThread* pDiskThread; ///< Pointer to the disk thread, to be able to order a disk stream and later to delete the stream again |
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|
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// Methods |
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Voice(); |
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virtual ~Voice(); |
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void Kill(Pool<Event>::Iterator& itKillEvent); |
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void Render(uint Samples); |
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void Reset(); |
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void SetOutput(AudioOutputDevice* pAudioOutputDevice); |
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void SetEngine(Engine* pEngine); |
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int Trigger(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int PitchBend, ::gig::DimensionRegion* pDimRgn, type_t VoiceType, int iKeyGroup); |
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inline bool IsActive() { return PlaybackState; } |
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inline bool IsStealable() { return !itKillEvent && PlaybackState >= playback_state_ram; } |
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void UpdatePortamentoPos(Pool<Event>::Iterator& itNoteOffEvent); |
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|
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//private: |
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// Types |
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enum playback_state_t { |
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playback_state_end = 0, |
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playback_state_init = 1, |
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playback_state_ram = 2, |
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playback_state_disk = 3 |
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}; |
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|
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// Attributes |
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EngineChannel* pEngineChannel; |
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Engine* pEngine; ///< Pointer to the sampler engine, to be able to access the event lists. |
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float VolumeLeft; ///< Left channel volume. This factor is calculated when the voice is triggered and doesn't change after that. |
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float VolumeRight; ///< Right channel volume. This factor is calculated when the voice is triggered and doesn't change after that. |
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SmoothVolume CrossfadeSmoother; ///< Crossfade volume, updated by crossfade CC events |
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SmoothVolume VolumeSmoother; ///< Volume, updated by CC 7 (volume) events |
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SmoothVolume PanLeftSmoother; ///< Left channel volume, updated by CC 10 (pan) events |
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SmoothVolume PanRightSmoother; ///< Right channel volume, updated by CC 10 (pan) events |
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double Pos; ///< Current playback position in sample |
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float PitchBase; ///< Basic pitch depth, stays the same for the whole life time of the voice |
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float PitchBend; ///< Current pitch value of the pitchbend wheel |
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float CutoffBase; ///< Cutoff frequency before control change, EG and LFO are applied |
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::gig::Sample* pSample; ///< Pointer to the sample to be played back |
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::gig::DimensionRegion* pDimRgn; ///< Pointer to the articulation information of current dimension region of this voice |
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playback_state_t PlaybackState; ///< When a sample will be triggered, it will be first played from RAM cache and after a couple of sample points it will switch to disk streaming and at the end of a disk stream we have to add null samples, so the interpolator can do it's work correctly |
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bool DiskVoice; ///< If the sample is very short it completely fits into the RAM cache and doesn't need to be streamed from disk, in that case this flag is set to false |
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Stream::reference_t DiskStreamRef; ///< Reference / link to the disk stream |
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int RealSampleWordsLeftToRead; ///< Number of samples left to read, not including the silence added for the interpolator |
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unsigned long MaxRAMPos; ///< The upper allowed limit (not actually the end) in the RAM sample cache, after that point it's not safe to chase the interpolator another time over over the current cache position, instead we switch to disk then. |
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bool RAMLoop; ///< If this voice has a loop defined which completely fits into the cached RAM part of the sample, in this case we handle the looping within the voice class, else if the loop is located in the disk stream part, we let the disk stream handle the looping |
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//uint LoopCyclesLeft; ///< In case there is a RAMLoop and it's not an endless loop; reflects number of loop cycles left to be passed |
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uint Delay; ///< Number of sample points the rendering process of this voice should be delayed (jitter correction), will be set to 0 after the first audio fragment cycle |
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EGADSR EG1; ///< Envelope Generator 1 (Amplification) |
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EGADSR EG2; ///< Envelope Generator 2 (Filter cutoff frequency) |
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EGDecay EG3; ///< Envelope Generator 3 (Pitch) |
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midi_ctrl VCFCutoffCtrl; |
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midi_ctrl VCFResonanceCtrl; |
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static const float FILTER_CUTOFF_COEFF; |
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LFOUnsigned* pLFO1; ///< Low Frequency Oscillator 1 (Amplification) |
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LFOUnsigned* pLFO2; ///< Low Frequency Oscillator 2 (Filter cutoff frequency) |
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LFOSigned* pLFO3; ///< Low Frequency Oscillator 3 (Pitch) |
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bool bLFO1Enabled; ///< Should we use the Amplitude LFO for this voice? |
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bool bLFO2Enabled; ///< Should we use the Filter Cutoff LFO for this voice? |
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bool bLFO3Enabled; ///< Should we use the Pitch LFO for this voice? |
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Pool<Event>::Iterator itTriggerEvent; ///< First event on the key's list the voice should process (only needed for the first audio fragment in which voice was triggered, after that it will be set to NULL). |
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//public: // FIXME: just made public for debugging (sanity check in Engine::RenderAudio()), should be changed to private before the final release |
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Pool<Event>::Iterator itKillEvent; ///< Event which caused this voice to be killed |
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//private: |
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int SynthesisMode; |
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float fFinalCutoff; |
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float fFinalResonance; |
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SynthesisParam finalSynthesisParameters; |
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Loop loop; |
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|
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// Static Methods |
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static float CalculateFilterCutoffCoeff(); |
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|
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// Methods |
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void KillImmediately(); |
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void ProcessEvents(uint Samples); |
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void Synthesize(uint Samples, sample_t* pSrc, uint Skip); |
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void processTransitionEvents(RTList<Event>::Iterator& itEvent, uint End); |
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void processCCEvents(RTList<Event>::Iterator& itEvent, uint End); |
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void processPitchEvent(RTList<Event>::Iterator& itEvent); |
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void processCrossFadeEvent(RTList<Event>::Iterator& itEvent); |
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void processCutoffEvent(RTList<Event>::Iterator& itEvent); |
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void processResonanceEvent(RTList<Event>::Iterator& itEvent); |
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|
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inline uint8_t CrossfadeAttenuation(uint8_t& CrossfadeControllerValue) { |
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uint8_t c = std::max(CrossfadeControllerValue, pDimRgn->AttenuationControllerThreshold); |
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c = (!pDimRgn->Crossfade.out_end) ? c /* 0,0,0,0 means no crossfade defined */ |
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: (c < pDimRgn->Crossfade.in_end) ? |
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((c <= pDimRgn->Crossfade.in_start) ? 0 |
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: 127 * (c - pDimRgn->Crossfade.in_start) / (pDimRgn->Crossfade.in_end - pDimRgn->Crossfade.in_start)) |
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: (c <= pDimRgn->Crossfade.out_start) ? 127 |
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: (c < pDimRgn->Crossfade.out_end) ? 127 * (pDimRgn->Crossfade.out_end - c) / (pDimRgn->Crossfade.out_end - pDimRgn->Crossfade.out_start) |
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: 0; |
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return pDimRgn->InvertAttenuationController ? 127 - c : c; |
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} |
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|
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inline float Constrain(float ValueToCheck, float Min, float Max) { |
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if (ValueToCheck > Max) ValueToCheck = Max; |
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else if (ValueToCheck < Min) ValueToCheck = Min; |
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return ValueToCheck; |
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} |
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}; |
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|
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}} // namespace LinuxSampler::gig |
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|
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#endif // __LS_GIG_VOICE_H__ |
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