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#ifndef __AUDIOTHREAD_H__ |
#ifndef __AUDIOTHREAD_H__ |
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#define __AUDIOTHREAD_H__ |
#define __AUDIOTHREAD_H__ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <math.h> |
#include <math.h> |
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#include <unistd.h> |
#include <unistd.h> |
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#include <fcntl.h> |
#include <fcntl.h> |
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#include "global.h" |
#include "global.h" |
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#include "thread.h" |
#include "thread.h" |
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#include "ringbuffer.h" |
#include "ringbuffer.h" |
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#include "voice.h" |
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#include "audioio.h" |
#include "audioio.h" |
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#include "voice.h" |
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#include "gig.h" |
#include "gig.h" |
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#include "rtelmemorypool.h" |
#include "rtelmemorypool.h" |
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#include "modulationsystem.h" |
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#define PITCHBEND_SEMITONES 12 |
#define PITCHBEND_SEMITONES 12 |
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#define MAX_AUDIO_VOICES 64 |
#define MAX_AUDIO_VOICES 64 |
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// preload 64k samples = 128kB of data in RAM for 16 bit mono samples |
// preload 64k samples = 128kB of data in RAM for 16 bit mono samples |
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#define NUM_RAM_PRELOAD_SAMPLES 32768 |
#define NUM_RAM_PRELOAD_SAMPLES 32768 |
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class AudioThread : public Thread { |
// just symbol prototyping |
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class Voice; |
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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: |
public: |
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int ActiveVoiceCount; ///< number of currently active voices |
double Volume; ///< overall volume (a value < 1.0 means attenuation, a value > 1.0 means amplification) |
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int ActiveVoiceCountMax; ///< the maximum voice usage since application start |
int ActiveVoiceCount; ///< number of currently active voices |
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int ActiveVoiceCountMax; ///< the maximum voice usage since application start |
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AudioThread(AudioIO* pAudioIO, DiskThread* pDiskThread, gig::Instrument* pInstrument); |
AudioThread(AudioIO* pAudioIO, DiskThread* pDiskThread, gig::Instrument* pInstrument); |
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~AudioThread(); |
~AudioThread(); |
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void SendNoteOn(uint8_t Pitch, uint8_t Velocity); |
void SendNoteOn(uint8_t Key, uint8_t Velocity); |
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void SendNoteOff(uint8_t Pitch, uint8_t Velocity); |
void SendNoteOff(uint8_t Key, uint8_t Velocity); |
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void SendControlChange(uint8_t Channel, uint8_t Number, uint8_t Value); |
void SendPitchbend(int Pitch); |
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protected: |
void SendControlChange(uint8_t Controller, uint8_t Value); |
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int Main(); ///< Implementation of virtual method from class Thread |
int RenderAudio(uint Samples); |
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private: |
inline float* GetAudioSumBuffer(uint Channel) { |
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enum command_type_t { |
return pAudioSumBuffer[Channel]; |
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command_type_note_on, |
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command_type_note_off, |
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command_type_continuous_controller |
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}; |
}; |
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struct command_t { |
protected: |
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command_type_t type; |
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uint8_t channel; |
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uint8_t pitch; |
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uint8_t velocity; |
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uint8_t number; |
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uint8_t value; |
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} command; |
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struct midi_key_info_t { |
struct midi_key_info_t { |
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RTEList<Voice*>* pActiveVoices; ///< Contains the active voices associated with the MIDI key. |
RTEList<Voice>* pActiveVoices; ///< Contains the active voices associated with the MIDI key. |
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RTEList<Voice*>::NodeHandle hSustainPtr; ///< Points to the voice element in the active voice list which has not received a note-off yet (this pointer is needed for sustain pedal handling) |
bool KeyPressed; ///< Is true if the respective MIDI key is currently pressed. |
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bool Sustained; ///< Is true if the MIDI key is currently sustained, thus if Note-off arrived while sustain pedal pressed. |
bool Active; ///< If the key contains active voices. |
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bool KeyPressed; ///< Is true if the respective MIDI key is currently pressed. |
uint* pSelf; ///< hack to allow fast deallocation of the key from the list of active keys |
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uint* pSustainPoolNode; ///< FIXME: hack to allow fast deallocation of the key from the sustained key pool |
RTEList<ModulationSystem::Event>* pEvents; ///< Key specific events (only Note-on, Note-off and sustain pedal currently) |
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}; |
}; |
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RingBuffer<command_t>* pCommandQueue; |
RingBuffer<ModulationSystem::Event>* pEventQueue; ///< Input event queue. |
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float* pAudioSumBuffer; ///< Audio sum of all voices (32 bit) |
float* pAudioSumBuffer[2]; ///< Audio sum of all voices (32 bit, index 0 = left channel, index 1 = right channel) |
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Voice** pVoices; ///< The voice pool, containing all Voices (active and inactice voices) in unsorted order |
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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midi_key_info_t pMIDIKeyInfo[128]; ///< Contains all active voices sorted by MIDI key number and other informations to the respective MIDI key |
RTELMemoryPool<Voice>* pVoicePool; ///< Contains all voices that can be activated. |
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/* ActiveVoicePool is a memory pool of limited size (size=MAX VOICES) of active voices. |
RTELMemoryPool<uint>* pActiveKeys; ///< Holds all keys in it's allocation list with active voices. |
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it can be allocated dynamically in real time and the allocated elements can be added to |
RTELMemoryPool<ModulationSystem::Event>* pEventPool; ///< Contains all Event objects that can be used. |
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the linked lists represented by ActiveVoices[MIDIKey]. This means we can have unlimited |
RTEList<ModulationSystem::Event>* pEvents; ///< All events for the current audio fragment. |
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active voices per key. This if for example useful to manage the sustain pedal messages |
RTEList<ModulationSystem::Event>* pCCEvents[ModulationSystem::destination_count]; ///< Control change events for the current audio fragment. |
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*/ |
AudioIO* pAudioIO; |
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RTELMemoryPool<Voice*>* ActiveVoicePool; |
DiskThread* pDiskThread; |
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RTELMemoryPool<uint>* SustainedKeyPool; ///< Contains the MIDI key numbers of all currently sustained keys. |
gig::Instrument* pInstrument; |
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AudioIO* pAudioIO; |
bool SustainPedal; ///< true if sustain pedal is down |
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DiskThread* pDiskThread; |
uint8_t PrevHoldCCValue; |
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gig::Instrument* pInstrument; |
int Pitch; ///< Current (absolute) MIDI pitch value. |
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bool SustainPedal; ///< true if sustain pedal is down |
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uint8_t PrevHoldCCValue; |
void ProcessNoteOn(ModulationSystem::Event* pNoteOnEvent); |
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void ProcessNoteOff(ModulationSystem::Event* pNoteOffEvent); |
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void ProcessNoteOn(uint8_t MIDIKey, uint8_t Velocity); |
void ProcessPitchbend(ModulationSystem::Event* pPitchbendEvent); |
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void ProcessNoteOff(uint8_t MIDIKey, uint8_t Velocity); |
void ProcessControlChange(ModulationSystem::Event* pControlChangeEvent); |
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void ProcessControlChange(uint8_t Channel, uint8_t Number, uint8_t Value); |
void KillVoice(Voice* pVoice); |
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void ReleaseVoice(Voice* pVoice); |
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void CacheInitialSamples(gig::Sample* pSample); |
void CacheInitialSamples(gig::Sample* pSample); |
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friend class Voice; |
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}; |
}; |
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#endif // __AUDIOTHREAD_H__ |
#endif // __AUDIOTHREAD_H__ |