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#include "audioio.h" |
#include "audioio.h" |
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#include "gig.h" |
#include "gig.h" |
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#include "rtelmemorypool.h" |
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#define DEBUG 0 |
#define DEBUG 0 |
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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 65536 |
#define NUM_RAM_PRELOAD_SAMPLES 32768 |
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class AudioThread : public Thread { |
class AudioThread : public Thread { |
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public: |
public: |
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~AudioThread(); |
~AudioThread(); |
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void ProcessNoteOn(uint8_t Pitch, uint8_t Velocity); |
void ProcessNoteOn(uint8_t Pitch, uint8_t Velocity); |
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void ProcessNoteOff(uint8_t Pitch, uint8_t Velocity); |
void ProcessNoteOff(uint8_t Pitch, uint8_t Velocity); |
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void ProcessContinuousController(uint8_t Channel, uint8_t Number, uint8_t Value); |
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// the number of currently active streams |
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// printed on the console the main thread (along with the active streams count) |
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int ActiveVoiceCount; |
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protected: |
protected: |
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int Main(); ///< Implementation of virtual method from class Thread |
int Main(); ///< Implementation of virtual method from class Thread |
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private: |
private: |
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enum command_type_t { |
enum command_type_t { |
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command_type_note_on, |
command_type_note_on, |
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command_type_note_off |
command_type_note_off, |
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command_type_continuous_controller |
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}; |
}; |
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struct command_t { |
struct command_t { |
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command_type_t type; |
command_type_t type; |
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uint8_t channel; |
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uint8_t pitch; |
uint8_t pitch; |
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uint8_t velocity; |
uint8_t velocity; |
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uint8_t number; |
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uint8_t value; |
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} command; |
} command; |
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RingBuffer<command_t>* pCommandQueue; |
RingBuffer<command_t>* pCommandQueue; |
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float* pAudioSumBuffer; ///< Audio sum of all voices (32 bit) |
float* pAudioSumBuffer; ///< Audio sum of all voices (32 bit) |
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Voice** pVoices; ///< The voice pool, containing all Voices (active and inactice voices) in unsorted order |
Voice** pVoices; ///< The voice pool, containing all Voices (active and inactice voices) in unsorted order |
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Voice* ActiveVoices[128]; ///< Contains all active voices sorted by MIDI key number |
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RTEList<Voice *> *pActiveVoices[128]; ///< Contains all active voices sorted by MIDI key number |
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/* ActiveVoicePool is a memory pool of limited size (size=MAX VOICES) of active voices. |
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it can be allocated dynamically in real time and the allocated elements can be added to |
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the linked lists represented by ActiveVoices[MIDIKey]. This means we can have unlimited |
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active voices per key. This if for example useful to manage the sustain pedal messages |
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*/ |
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RTELMemoryPool<Voice *> *ActiveVoicePool; |
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/* SustainedVoicePool is a dynamically allocated pool (size=MAX VOICES) and list of notes |
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notes that were sustained and where the corresponding MIDI note-off arrived |
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but cannot processed yet. Basically when the sustain pedal is pressed and the |
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note-off on a certain midi key arrives. notes are not deleted from the |
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ActiveVoices[MIDIKey] list but an element is added in the SustainedVoicePool, |
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which is a dynamically allocated pool with a builtin list. |
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Then the pedal is finally released, this list is traversed and all elements |
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in the lists ActiveVoices[MIDIKey] ( where MIDIKey is contained in the list of |
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sustained voices) are processed (voices are released) |
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*/ |
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typedef struct { |
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int midikey; |
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int velocity; |
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} sustained_key_t; |
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RTELMemoryPool<sustained_key_t> *SustainedKeyPool; |
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uint8_t PrevHoldCCValue; |
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// SustainPedal = 1 if the sustain pedal is down, otherwise it is 0 |
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uint8_t SustainPedal; |
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AudioIO* pAudioIO; |
AudioIO* pAudioIO; |
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DiskThread* pDiskThread; |
DiskThread* pDiskThread; |
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gig::Instrument* pInstrument; |
gig::Instrument* pInstrument; |
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void ActivateVoice(uint8_t MIDIKey, uint8_t Velocity); |
void ActivateVoice(uint8_t MIDIKey, uint8_t Velocity); |
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void ReleaseVoice(uint8_t MIDIKey, uint8_t Velocity); |
void ReleaseVoice(uint8_t MIDIKey, uint8_t Velocity); |
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void ContinuousController(uint8_t Channel, uint8_t Number, uint8_t Value); |
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void CacheInitialSamples(gig::Sample* pSample); |
void CacheInitialSamples(gig::Sample* pSample); |
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}; |
}; |
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