trunk/src/audiothread.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck         *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#ifndef __AUDIOTHREAD_H__
#define __AUDIOTHREAD_H__

#include <math.h>
#include <unistd.h>
#include <fcntl.h>
#include <pthread.h>
#include <sstream>

#include "global.h"
#include "thread.h"
#include "ringbuffer.h"
#include "audioio.h"
#include "voice.h"
#include "gig.h"
#include "rtelmemorypool.h"
#include "modulationsystem.h"
#include "network/lscp.h"

#define PITCHBEND_SEMITONES             12
#define MAX_AUDIO_VOICES                64

// preload 64k samples = 128kB of data in RAM for 16 bit mono samples
#define NUM_RAM_PRELOAD_SAMPLES 32768

// just symbol prototyping
class Voice;

//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
class AudioThread {
    public:
        double       Volume;               ///< overall volume (a value < 1.0 means attenuation, a value > 1.0 means amplification)
        int          ActiveVoiceCount;     ///< number of currently active voices
        int          ActiveVoiceCountMax;  ///< the maximum voice usage since application start
        DiskThread*  pDiskThread;

        AudioThread(AudioIO* pAudioIO);
       ~AudioThread();
        result_t      LoadInstrument(const char* FileName, uint Instrument);
        void          Reset();
        void          SendNoteOn(uint8_t Key, uint8_t Velocity);
        void          SendNoteOff(uint8_t Key, uint8_t Velocity);
        void          SendPitchbend(int Pitch);
        void          SendControlChange(uint8_t Controller, uint8_t Value);
        int           RenderAudio(uint Samples);
        inline float* GetAudioSumBuffer(uint Channel) {
            return pAudioSumBuffer[Channel];
        };
    protected:
        struct midi_key_info_t {
            RTEList<Voice>*                      pActiveVoices;         ///< Contains the active voices associated with the MIDI key.
            bool                                 KeyPressed;            ///< Is true if the respective MIDI key is currently pressed.
            bool                                 Active;                ///< If the key contains active voices.
            uint*                                pSelf;                 ///< hack to allow fast deallocation of the key from the list of active keys
            RTEList<ModulationSystem::Event>*    pEvents;               ///< Key specific events (only Note-on, Note-off and sustain pedal currently)
        };
        
        uint8_t                                  ControllerTable[128];  ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel.
        RingBuffer<ModulationSystem::Event>*     pEventQueue;           ///< Input event queue.
        float*                                   pAudioSumBuffer[2];    ///< Audio sum of all voices (32 bit, index 0 = left channel, index 1 = right channel)
        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.
        RTELMemoryPool<uint>*                    pActiveKeys;           ///< Holds all keys in it's allocation list with active voices.
        RTELMemoryPool<ModulationSystem::Event>* pEventPool;            ///< Contains all Event objects that can be used.
        RTEList<ModulationSystem::Event>*        pEvents;               ///< All events for the current audio fragment.
        RTEList<ModulationSystem::Event>*        pCCEvents;             ///< All control change events for the current audio fragment.
        RTEList<ModulationSystem::Event>*        pSynthesisEvents[ModulationSystem::destination_count];  ///< Events directly affecting synthesis parameter (like pitch, volume and filter).
        AudioIO*                                 pAudioIO;
        RIFF::File*                              pRIFF;
        gig::File*                               pGig;
        gig::Instrument*                         pInstrument;
        bool                                     SustainPedal;          ///< true if sustain pedal is down
        int                                      Pitch;                 ///< Current (absolute) MIDI pitch value.
        bool                                     SuspensionRequested;
        pthread_mutex_t                          __render_state_mutex;
        pthread_cond_t                           __render_exit_condition;

        void ProcessNoteOn(ModulationSystem::Event* pNoteOnEvent);
        void ProcessNoteOff(ModulationSystem::Event* pNoteOffEvent);
        void ProcessPitchbend(ModulationSystem::Event* pPitchbendEvent);
        void ProcessControlChange(ModulationSystem::Event* pControlChangeEvent);
        void KillVoice(Voice* pVoice);
        void CacheInitialSamples(gig::Sample* pSample);
        void ResetInternal();

        friend class Voice;
};

#endif // __AUDIOTHREAD_H__
1	schoenebeck	9	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck *
6			* *
7			* This program is free software; you can redistribute it and/or modify *
8			* it under the terms of the GNU General Public License as published by *
9			* the Free Software Foundation; either version 2 of the License, or *
10			* (at your option) any later version. *
11			* *
12			* This program is distributed in the hope that it will be useful, *
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15			* GNU General Public License for more details. *
16			* *
17			* You should have received a copy of the GNU General Public License *
18			* along with this program; if not, write to the Free Software *
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
20			* MA 02111-1307 USA *
21			***************************************************************************/
22
23			#ifndef __AUDIOTHREAD_H__
24			#define __AUDIOTHREAD_H__
25
26			#include <math.h>
27			#include <unistd.h>
28			#include <fcntl.h>
29	schoenebeck	35	#include <pthread.h>
30			#include <sstream>
31	schoenebeck	9
32			#include "global.h"
33			#include "thread.h"
34			#include "ringbuffer.h"
35	schoenebeck	31	#include "audioio.h"
36	schoenebeck	9	#include "voice.h"
37			#include "gig.h"
38	senoner	10	#include "rtelmemorypool.h"
39	schoenebeck	30	#include "modulationsystem.h"
40	schoenebeck	35	#include "network/lscp.h"
41	senoner	10
42	schoenebeck	32	#define PITCHBEND_SEMITONES 12
43			#define MAX_AUDIO_VOICES 64
44	schoenebeck	9
45			// preload 64k samples = 128kB of data in RAM for 16 bit mono samples
46	senoner	10	#define NUM_RAM_PRELOAD_SAMPLES 32768
47	schoenebeck	9
48	schoenebeck	32	// just symbol prototyping
49			class Voice;
50
51	schoenebeck	31	//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
52			class AudioThread {
53	schoenebeck	9	public:
54	schoenebeck	35	double Volume; ///< overall volume (a value < 1.0 means attenuation, a value > 1.0 means amplification)
55			int ActiveVoiceCount; ///< number of currently active voices
56			int ActiveVoiceCountMax; ///< the maximum voice usage since application start
57			DiskThread* pDiskThread;
58	schoenebeck	12
59	schoenebeck	35	AudioThread(AudioIO* pAudioIO);
60	schoenebeck	9	~AudioThread();
61	schoenebeck	35	result_t LoadInstrument(const char* FileName, uint Instrument);
62			void Reset();
63	schoenebeck	32	void SendNoteOn(uint8_t Key, uint8_t Velocity);
64			void SendNoteOff(uint8_t Key, uint8_t Velocity);
65			void SendPitchbend(int Pitch);
66			void SendControlChange(uint8_t Controller, uint8_t Value);
67	schoenebeck	31	int RenderAudio(uint Samples);
68			inline float* GetAudioSumBuffer(uint Channel) {
69			return pAudioSumBuffer[Channel];
70			};
71	schoenebeck	32	protected:
72	schoenebeck	15	struct midi_key_info_t {
73	schoenebeck	32	RTEList<Voice>* pActiveVoices; ///< Contains the active voices associated with the MIDI key.
74			bool KeyPressed; ///< Is true if the respective MIDI key is currently pressed.
75	schoenebeck	33	bool Active; ///< If the key contains active voices.
76			uint* pSelf; ///< hack to allow fast deallocation of the key from the list of active keys
77			RTEList<ModulationSystem::Event>* pEvents; ///< Key specific events (only Note-on, Note-off and sustain pedal currently)
78	schoenebeck	12	};
79	schoenebeck	37
80			uint8_t ControllerTable[128]; ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel.
81	schoenebeck	32	RingBuffer<ModulationSystem::Event>* pEventQueue; ///< Input event queue.
82			float* pAudioSumBuffer[2]; ///< Audio sum of all voices (32 bit, index 0 = left channel, index 1 = right channel)
83			midi_key_info_t pMIDIKeyInfo[128]; ///< Contains all active voices sorted by MIDI key number and other informations to the respective MIDI key
84			RTELMemoryPool<Voice>* pVoicePool; ///< Contains all voices that can be activated.
85	schoenebeck	33	RTELMemoryPool<uint>* pActiveKeys; ///< Holds all keys in it's allocation list with active voices.
86	schoenebeck	32	RTELMemoryPool<ModulationSystem::Event>* pEventPool; ///< Contains all Event objects that can be used.
87			RTEList<ModulationSystem::Event>* pEvents; ///< All events for the current audio fragment.
88	schoenebeck	37	RTEList<ModulationSystem::Event>* pCCEvents; ///< All control change events for the current audio fragment.
89			RTEList<ModulationSystem::Event>* pSynthesisEvents[ModulationSystem::destination_count]; ///< Events directly affecting synthesis parameter (like pitch, volume and filter).
90	schoenebeck	32	AudioIO* pAudioIO;
91	schoenebeck	35	RIFF::File* pRIFF;
92			gig::File* pGig;
93	schoenebeck	32	gig::Instrument* pInstrument;
94			bool SustainPedal; ///< true if sustain pedal is down
95			int Pitch; ///< Current (absolute) MIDI pitch value.
96	schoenebeck	35	bool SuspensionRequested;
97			pthread_mutex_t __render_state_mutex;
98			pthread_cond_t __render_exit_condition;
99	senoner	10
100	schoenebeck	32	void ProcessNoteOn(ModulationSystem::Event* pNoteOnEvent);
101			void ProcessNoteOff(ModulationSystem::Event* pNoteOffEvent);
102			void ProcessPitchbend(ModulationSystem::Event* pPitchbendEvent);
103			void ProcessControlChange(ModulationSystem::Event* pControlChangeEvent);
104	schoenebeck	30	void KillVoice(Voice* pVoice);
105	schoenebeck	9	void CacheInitialSamples(gig::Sample* pSample);
106	schoenebeck	35	void ResetInternal();
107	schoenebeck	32
108			friend class Voice;
109	schoenebeck	9	};
110
111			#endif // __AUDIOTHREAD_H__