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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 by Benno Senoner and 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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#ifndef __AUDIOTHREAD_H__ |
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#define __AUDIOTHREAD_H__ |
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|
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#include <sstream> |
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|
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#include "global.h" |
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#include "ringbuffer.h" |
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#include "audioio.h" |
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#include "voice.h" |
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#include "gig.h" |
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#include "rtelmemorypool.h" |
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#include "modulationsystem.h" |
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#include "network/lscp.h" |
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|
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#define PITCHBEND_SEMITONES 12 |
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#define MAX_AUDIO_VOICES 64 |
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|
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// preload 64k samples = 128kB of data in RAM for 16 bit mono samples |
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#define NUM_RAM_PRELOAD_SAMPLES 32768 |
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|
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// just symbol prototyping |
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class Voice; |
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|
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//FIXME: Class name "AudioThread" is now misleading, because there is no thread anymore, but the name will change soon to "Engine" when we restructure the source tree |
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class AudioThread { |
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public: |
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double Volume; ///< overall volume (a value < 1.0 means attenuation, a value > 1.0 means amplification) |
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int ActiveVoiceCount; ///< number of currently active voices |
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int ActiveVoiceCountMax; ///< the maximum voice usage since application start |
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DiskThread* pDiskThread; |
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|
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AudioThread(AudioIO* pAudioIO); |
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~AudioThread(); |
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result_t LoadInstrument(const char* FileName, uint Instrument); |
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void Reset(); |
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void SendNoteOn(uint8_t Key, uint8_t Velocity); |
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void SendNoteOff(uint8_t Key, uint8_t Velocity); |
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void SendPitchbend(int Pitch); |
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void SendControlChange(uint8_t Controller, uint8_t Value); |
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int RenderAudio(uint Samples); |
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inline float* GetAudioSumBuffer(uint Channel) { |
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return pAudioSumBuffer[Channel]; |
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}; |
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protected: |
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struct midi_key_info_t { |
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RTEList<Voice>* pActiveVoices; ///< Contains the active voices associated with the MIDI key. |
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bool KeyPressed; ///< Is true if the respective MIDI key is currently pressed. |
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bool Active; ///< If the key contains active voices. |
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uint* pSelf; ///< hack to allow fast deallocation of the key from the list of active keys |
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RTEList<ModulationSystem::Event>* pEvents; ///< Key specific events (only Note-on, Note-off and sustain pedal currently) |
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}; |
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|
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uint8_t ControllerTable[128]; ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel. |
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RingBuffer<ModulationSystem::Event>* pEventQueue; ///< Input event queue. |
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float* pAudioSumBuffer[2]; ///< Audio sum of all voices (32 bit, index 0 = left channel, index 1 = right channel) |
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midi_key_info_t pMIDIKeyInfo[128]; ///< Contains all active voices sorted by MIDI key number and other informations to the respective MIDI key |
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RTELMemoryPool<Voice>* pVoicePool; ///< Contains all voices that can be activated. |
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RTELMemoryPool<uint>* pActiveKeys; ///< Holds all keys in it's allocation list with active voices. |
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RTELMemoryPool<ModulationSystem::Event>* pEventPool; ///< Contains all Event objects that can be used. |
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RTEList<ModulationSystem::Event>* pEvents; ///< All events for the current audio fragment. |
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RTEList<ModulationSystem::Event>* pCCEvents; ///< All control change events for the current audio fragment. |
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RTEList<ModulationSystem::Event>* pSynthesisEvents[ModulationSystem::destination_count]; ///< Events directly affecting synthesis parameter (like pitch, volume and filter). |
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AudioIO* pAudioIO; |
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RIFF::File* pRIFF; |
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gig::File* pGig; |
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gig::Instrument* pInstrument; |
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bool SustainPedal; ///< true if sustain pedal is down |
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int Pitch; ///< Current (absolute) MIDI pitch value. |
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bool SuspensionRequested; |
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pthread_mutex_t __render_state_mutex; |
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pthread_cond_t __render_exit_condition; |
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|
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void ProcessNoteOn(ModulationSystem::Event* pNoteOnEvent); |
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void ProcessNoteOff(ModulationSystem::Event* pNoteOffEvent); |
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void ProcessPitchbend(ModulationSystem::Event* pPitchbendEvent); |
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void ProcessControlChange(ModulationSystem::Event* pControlChangeEvent); |
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void KillVoice(Voice* pVoice); |
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void CacheInitialSamples(gig::Sample* pSample); |
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void ResetInternal(); |
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|
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friend class Voice; |
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}; |
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#endif // __AUDIOTHREAD_H__ |
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