/[svn]/linuxsampler/tags/singlechannel/src/audiothread.h
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linuxsampler/trunk/src/audiothread.h revision 12 by schoenebeck, Sun Nov 16 19:01:50 2003 UTC linuxsampler/tags/singlechannel/src/audiothread.h revision 43, Sun Apr 11 17:25:39 2004 UTC
# Line 23  Line 23 
23  #ifndef __AUDIOTHREAD_H__  #ifndef __AUDIOTHREAD_H__
24  #define __AUDIOTHREAD_H__  #define __AUDIOTHREAD_H__
25    
26  #include <stdio.h>  #include <sstream>
 #include <stdlib.h>  
 #include <math.h>  
 #include <unistd.h>  
 #include <fcntl.h>  
27    
28  #include "global.h"  #include "global.h"
 #include "thread.h"  
29  #include "ringbuffer.h"  #include "ringbuffer.h"
 #include "voice.h"  
30  #include "audioio.h"  #include "audioio.h"
31    #include "voice.h"
32  #include "gig.h"  #include "gig.h"
   
33  #include "rtelmemorypool.h"  #include "rtelmemorypool.h"
34    #include "modulationsystem.h"
35    #include "network/lscp.h"
36    
37  #define DEBUG                   0  #define PITCHBEND_SEMITONES             12
38  #define PITCHBEND_SEMITONES     12  #define MAX_AUDIO_VOICES                64
 #define MAX_AUDIO_VOICES        64  
39    
40  // 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
41  #define NUM_RAM_PRELOAD_SAMPLES 32768  #define NUM_RAM_PRELOAD_SAMPLES 32768
42    
43  class AudioThread : public Thread {  // just symbol prototyping
44    class Voice;
45    
46    //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
47    class AudioThread {
48      public:      public:
49          int ActiveVoiceCount;  ///< number of currently active voices          double       Volume;               ///< overall volume (a value < 1.0 means attenuation, a value > 1.0 means amplification)
50            int          ActiveVoiceCount;     ///< number of currently active voices
51            int          ActiveVoiceCountMax;  ///< the maximum voice usage since application start
52            DiskThread*  pDiskThread;
53    
54          AudioThread(AudioIO* pAudioIO, DiskThread* pDiskThread, gig::Instrument* pInstrument);          AudioThread(AudioIO* pAudioIO);
55         ~AudioThread();         ~AudioThread();
56          void ProcessNoteOn(uint8_t Pitch, uint8_t Velocity);          result_t      LoadInstrument(const char* FileName, uint Instrument);
57          void ProcessNoteOff(uint8_t Pitch, uint8_t Velocity);          void          Reset();
58          void ProcessContinuousController(uint8_t Channel, uint8_t Number, uint8_t Value);          void          SendNoteOn(uint8_t Key, uint8_t Velocity);
59      protected:          void          SendNoteOff(uint8_t Key, uint8_t Velocity);
60          int Main(); ///< Implementation of virtual method from class Thread          void          SendPitchbend(int Pitch);
61      private:          void          SendControlChange(uint8_t Controller, uint8_t Value);
62          enum command_type_t {          int           RenderAudio(uint Samples);
63              command_type_note_on,          inline float* GetAudioSumBuffer(uint Channel) {
64              command_type_note_off,              return pAudioSumBuffer[Channel];
             command_type_continuous_controller  
65          };          };
66          struct command_t {      protected:
67              command_type_t type;          struct midi_key_info_t {
68              uint8_t        channel;              RTEList<Voice>*                      pActiveVoices;         ///< Contains the active voices associated with the MIDI key.
69              uint8_t        pitch;              bool                                 KeyPressed;            ///< Is true if the respective MIDI key is currently pressed.
70              uint8_t        velocity;              bool                                 Active;                ///< If the key contains active voices.
71              uint8_t        number;              uint*                                pSelf;                 ///< hack to allow fast deallocation of the key from the list of active keys
72              uint8_t        value;              RTEList<ModulationSystem::Event>*    pEvents;               ///< Key specific events (only Note-on, Note-off and sustain pedal currently)
         } command;  
         struct sustained_key_t {  
             int midikey;  
             int velocity;  
73          };          };
74    
75          RingBuffer<command_t>*           pCommandQueue;          uint8_t                                  ControllerTable[128];  ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel.
76          float*                           pAudioSumBuffer;    ///< Audio sum of all voices (32 bit)          RingBuffer<ModulationSystem::Event>*     pEventQueue;           ///< Input event queue.
77          Voice**                          pVoices;            ///< The voice pool, containing all Voices (active and inactice voices) in unsorted order          float*                                   pAudioSumBuffer[2];    ///< Audio sum of all voices (32 bit, index 0 = left channel, index 1 = right channel)
78          RTEList<Voice *>*                pActiveVoices[128]; ///< Contains all active voices sorted by MIDI key number          midi_key_info_t                          pMIDIKeyInfo[128];     ///< Contains all active voices sorted by MIDI key number and other informations to the respective MIDI key
79          /* ActiveVoicePool is a memory pool of limited size (size=MAX VOICES) of active voices.          RTELMemoryPool<Voice>*                   pVoicePool;            ///< Contains all voices that can be activated.
80             it can be allocated dynamically in real time and the allocated elements can be added to          RTELMemoryPool<uint>*                    pActiveKeys;           ///< Holds all keys in it's allocation list with active voices.
81             the linked lists represented by ActiveVoices[MIDIKey]. This means we can have unlimited          RTELMemoryPool<ModulationSystem::Event>* pEventPool;            ///< Contains all Event objects that can be used.
82             active voices per key. This if for example useful to manage the sustain pedal messages          RTEList<ModulationSystem::Event>*        pEvents;               ///< All events for the current audio fragment.
83           */          RTEList<ModulationSystem::Event>*        pCCEvents;             ///< All control change events for the current audio fragment.
84          RTELMemoryPool<Voice *>*         ActiveVoicePool;          RTEList<ModulationSystem::Event>*        pSynthesisEvents[ModulationSystem::destination_count];  ///< Events directly affecting synthesis parameter (like pitch, volume and filter).
85          /* SustainedVoicePool is a dynamically allocated pool (size=MAX VOICES) and list of notes          AudioIO*                                 pAudioIO;
86             notes that were sustained and where the corresponding MIDI note-off arrived          RIFF::File*                              pRIFF;
87             but cannot processed yet. Basically when the sustain pedal is pressed and the          gig::File*                               pGig;
88             note-off on a certain midi key arrives. notes are not deleted from the          gig::Instrument*                         pInstrument;
89             ActiveVoices[MIDIKey] list but an element is added in the SustainedVoicePool,          bool                                     SustainPedal;          ///< true if sustain pedal is down
90             which is a dynamically allocated pool with a builtin list.          int                                      Pitch;                 ///< Current (absolute) MIDI pitch value.
91             Then the pedal is finally released, this list is traversed and all elements          bool                                     SuspensionRequested;
92             in the lists ActiveVoices[MIDIKey] ( where MIDIKey is contained in the list of          pthread_mutex_t                          __render_state_mutex;
93             sustained voices) are processed (voices are released)          pthread_cond_t                           __render_exit_condition;
94          */  
95          RTELMemoryPool<sustained_key_t>* SustainedKeyPool;          void ProcessNoteOn(ModulationSystem::Event* pNoteOnEvent);
96          AudioIO*                         pAudioIO;          void ProcessNoteOff(ModulationSystem::Event* pNoteOffEvent);
97          DiskThread*                      pDiskThread;          void ProcessPitchbend(ModulationSystem::Event* pPitchbendEvent);
98          gig::Instrument*                 pInstrument;          void ProcessControlChange(ModulationSystem::Event* pControlChangeEvent);
99          bool                             SustainPedal;  ///< true if sustain pedal is down          void KillVoice(Voice* pVoice);
         uint8_t                          PrevHoldCCValue;  
   
         void ActivateVoice(uint8_t MIDIKey, uint8_t Velocity);  
         void ReleaseVoice(uint8_t MIDIKey, uint8_t Velocity);  
         void ReleaseVoice(Voice* pVoice);  
         void ContinuousController(uint8_t Channel, uint8_t Number, uint8_t Value);  
100          void CacheInitialSamples(gig::Sample* pSample);          void CacheInitialSamples(gig::Sample* pSample);
101            void ResetInternal();
102    
103            friend class Voice;
104  };  };
105    
106  #endif // __AUDIOTHREAD_H__  #endif // __AUDIOTHREAD_H__
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