| 1 |
/*************************************************************************** |
| 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 |
#include <pthread.h> |
| 30 |
#include <sstream> |
| 31 |
|
| 32 |
#include "global.h" |
| 33 |
#include "thread.h" |
| 34 |
#include "ringbuffer.h" |
| 35 |
#include "audioio.h" |
| 36 |
#include "voice.h" |
| 37 |
#include "gig.h" |
| 38 |
#include "rtelmemorypool.h" |
| 39 |
#include "modulationsystem.h" |
| 40 |
#include "network/lscp.h" |
| 41 |
|
| 42 |
#define PITCHBEND_SEMITONES 12 |
| 43 |
#define MAX_AUDIO_VOICES 64 |
| 44 |
|
| 45 |
// preload 64k samples = 128kB of data in RAM for 16 bit mono samples |
| 46 |
#define NUM_RAM_PRELOAD_SAMPLES 32768 |
| 47 |
|
| 48 |
// just symbol prototyping |
| 49 |
class Voice; |
| 50 |
|
| 51 |
//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 |
public: |
| 54 |
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 |
|
| 59 |
AudioThread(AudioIO* pAudioIO); |
| 60 |
~AudioThread(); |
| 61 |
result_t LoadInstrument(const char* FileName, uint Instrument); |
| 62 |
void Reset(); |
| 63 |
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 |
int RenderAudio(uint Samples); |
| 68 |
inline float* GetAudioSumBuffer(uint Channel) { |
| 69 |
return pAudioSumBuffer[Channel]; |
| 70 |
}; |
| 71 |
protected: |
| 72 |
struct midi_key_info_t { |
| 73 |
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 |
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 |
}; |
| 79 |
|
| 80 |
uint8_t ControllerTable[128]; ///< Reflects the current values (0-127) of all MIDI controllers for this engine / sampler channel. |
| 81 |
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 |
RTELMemoryPool<uint>* pActiveKeys; ///< Holds all keys in it's allocation list with active voices. |
| 86 |
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 |
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 |
AudioIO* pAudioIO; |
| 91 |
RIFF::File* pRIFF; |
| 92 |
gig::File* pGig; |
| 93 |
gig::Instrument* pInstrument; |
| 94 |
bool SustainPedal; ///< true if sustain pedal is down |
| 95 |
int Pitch; ///< Current (absolute) MIDI pitch value. |
| 96 |
bool SuspensionRequested; |
| 97 |
pthread_mutex_t __render_state_mutex; |
| 98 |
pthread_cond_t __render_exit_condition; |
| 99 |
|
| 100 |
void ProcessNoteOn(ModulationSystem::Event* pNoteOnEvent); |
| 101 |
void ProcessNoteOff(ModulationSystem::Event* pNoteOffEvent); |
| 102 |
void ProcessPitchbend(ModulationSystem::Event* pPitchbendEvent); |
| 103 |
void ProcessControlChange(ModulationSystem::Event* pControlChangeEvent); |
| 104 |
void KillVoice(Voice* pVoice); |
| 105 |
void CacheInitialSamples(gig::Sample* pSample); |
| 106 |
void ResetInternal(); |
| 107 |
|
| 108 |
friend class Voice; |
| 109 |
}; |
| 110 |
|
| 111 |
#endif // __AUDIOTHREAD_H__ |
Parent Directory
| 
Revision Log