/[svn]/linuxsampler/trunk/src/audiothread.h
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revision 10 by senoner, Tue Nov 11 23:30:47 2003 UTC revision 15 by schoenebeck, Sun Nov 23 21:16:49 2003 UTC
# Line 35  Line 35 
35  #include "voice.h"  #include "voice.h"
36  #include "audioio.h"  #include "audioio.h"
37  #include "gig.h"  #include "gig.h"
   
38  #include "rtelmemorypool.h"  #include "rtelmemorypool.h"
39    
 #define DEBUG                   0  
40  #define PITCHBEND_SEMITONES     12  #define PITCHBEND_SEMITONES     12
41  #define MAX_AUDIO_VOICES        64  #define MAX_AUDIO_VOICES        64
42    
# Line 47  Line 45 
45    
46  class AudioThread : public Thread {  class AudioThread : public Thread {
47      public:      public:
48            int ActiveVoiceCount;     ///< number of currently active voices
49            int ActiveVoiceCountMax;  ///< the maximum voice usage since application start
50    
51          AudioThread(AudioIO* pAudioIO, DiskThread* pDiskThread, gig::Instrument* pInstrument);          AudioThread(AudioIO* pAudioIO, DiskThread* pDiskThread, gig::Instrument* pInstrument);
52         ~AudioThread();         ~AudioThread();
53          void ProcessNoteOn(uint8_t Pitch, uint8_t Velocity);          void ProcessNoteOn(uint8_t Pitch, uint8_t Velocity);
54          void ProcessNoteOff(uint8_t Pitch, uint8_t Velocity);          void ProcessNoteOff(uint8_t Pitch, uint8_t Velocity);
55          void ProcessContinuousController(uint8_t Channel, uint8_t Number, uint8_t Value);          void ProcessContinuousController(uint8_t Channel, uint8_t Number, uint8_t Value);
   
         // the number of currently active streams  
         // printed on the console the main thread (along with the active streams count)  
         int ActiveVoiceCount;  
   
56      protected:      protected:
57          int Main(); ///< Implementation of virtual method from class Thread          int Main(); ///< Implementation of virtual method from class Thread
58      private:      private:
# Line 73  class AudioThread : public Thread { Line 69  class AudioThread : public Thread {
69              uint8_t        number;              uint8_t        number;
70              uint8_t        value;              uint8_t        value;
71          } command;          } command;
72          RingBuffer<command_t>* pCommandQueue;          struct midi_key_info_t {
73          float*                 pAudioSumBuffer;    ///< Audio sum of all voices (32 bit)              RTEList<Voice*>*             pActiveVoices; ///< Contains the active voices associated with the MIDI key.
74          Voice**                pVoices;            ///< The voice pool, containing all Voices (active and inactice voices) in unsorted order              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)
75                bool                         Sustained;     ///< Is true if the MIDI key is currently sustained, thus if Note-off arrived while sustain pedal pressed.
76            };
77    
78          RTEList<Voice *> *pActiveVoices[128];  ///< Contains all active voices sorted by MIDI key number          RingBuffer<command_t>*           pCommandQueue;
79            float*                           pAudioSumBuffer;    ///< Audio sum of all voices (32 bit)
80            Voice**                          pVoices;            ///< The voice pool, containing all Voices (active and inactice voices) in unsorted order
81            midi_key_info_t                  pMIDIKeyInfo[128];  ///< Contains all active voices sorted by MIDI key number and other informations to the respective MIDI key
82          /* ActiveVoicePool is a memory pool of limited size (size=MAX VOICES) of active voices.          /* ActiveVoicePool is a memory pool of limited size (size=MAX VOICES) of active voices.
83             it can be allocated dynamically in real time and the allocated elements can be added to             it can be allocated dynamically in real time and the allocated elements can be added to
84             the linked lists represented by ActiveVoices[MIDIKey]. This means we can have unlimited             the linked lists represented by ActiveVoices[MIDIKey]. This means we can have unlimited
85             active voices per key. This if for example useful to manage the sustain pedal messages             active voices per key. This if for example useful to manage the sustain pedal messages
86           */           */
87          RTELMemoryPool<Voice *> *ActiveVoicePool;          RTELMemoryPool<Voice*>*          ActiveVoicePool;
88          /* SustainedVoicePool is a dynamically allocated pool (size=MAX VOICES) and list of notes          RTELMemoryPool<uint>*            SustainedKeyPool;   ///< Contains the MIDI key numbers of all currently sustained keys.
89             notes that were sustained and where the corresponding MIDI note-off arrived          AudioIO*                         pAudioIO;
90             but cannot processed yet. Basically when the sustain pedal is pressed and the          DiskThread*                      pDiskThread;
91             note-off on a certain midi key arrives. notes are not deleted from the          gig::Instrument*                 pInstrument;
92             ActiveVoices[MIDIKey] list but an element is added in the SustainedVoicePool,          bool                             SustainPedal;       ///< true if sustain pedal is down
93             which is a dynamically allocated pool with a builtin list.          uint8_t                          PrevHoldCCValue;
            Then the pedal is finally released, this list is traversed and all elements  
            in the lists ActiveVoices[MIDIKey] ( where MIDIKey is contained in the list of  
            sustained voices) are processed (voices are released)  
         */  
   
         typedef struct {  
                          int midikey;  
                          int velocity;  
                        } sustained_key_t;  
   
         RTELMemoryPool<sustained_key_t> *SustainedKeyPool;  
   
         uint8_t PrevHoldCCValue;  
         // SustainPedal = 1 if the sustain pedal is down, otherwise it is 0  
         uint8_t SustainPedal;  
   
   
   
         AudioIO*               pAudioIO;  
         DiskThread*            pDiskThread;  
         gig::Instrument*       pInstrument;  
94    
95          void ActivateVoice(uint8_t MIDIKey, uint8_t Velocity);          void ActivateVoice(uint8_t MIDIKey, uint8_t Velocity);
96          void ReleaseVoice(uint8_t MIDIKey, uint8_t Velocity);          void ReleaseVoice(uint8_t MIDIKey, uint8_t Velocity);
97            void ReleaseVoice(Voice* pVoice);
98          void ContinuousController(uint8_t Channel, uint8_t Number, uint8_t Value);          void ContinuousController(uint8_t Channel, uint8_t Number, uint8_t Value);
         
99          void CacheInitialSamples(gig::Sample* pSample);          void CacheInitialSamples(gig::Sample* pSample);
100  };  };
101    
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