| 1 |
/*************************************************************************** |
| 2 |
* * |
| 3 |
* LinuxSampler - modular, streaming capable sampler * |
| 4 |
* * |
| 5 |
* Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck * |
| 6 |
* Copyright (C) 2005-2008 Christian Schoenebeck * |
| 7 |
* * |
| 8 |
* This program is free software; you can redistribute it and/or modify * |
| 9 |
* it under the terms of the GNU General Public License as published by * |
| 10 |
* the Free Software Foundation; either version 2 of the License, or * |
| 11 |
* (at your option) any later version. * |
| 12 |
* * |
| 13 |
* This program is distributed in the hope that it will be useful, * |
| 14 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 16 |
* GNU General Public License for more details. * |
| 17 |
* * |
| 18 |
* You should have received a copy of the GNU General Public License * |
| 19 |
* along with this program; if not, write to the Free Software * |
| 20 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
| 21 |
* MA 02111-1307 USA * |
| 22 |
***************************************************************************/ |
| 23 |
|
| 24 |
#ifndef __LS_GIG_ENGINE_H__ |
| 25 |
#define __LS_GIG_ENGINE_H__ |
| 26 |
|
| 27 |
#include "../../common/global.h" |
| 28 |
|
| 29 |
#include <map> |
| 30 |
#include <gig.h> |
| 31 |
|
| 32 |
#include "EngineGlobals.h" |
| 33 |
#include "../../common/RingBuffer.h" |
| 34 |
#include "../../common/Pool.h" |
| 35 |
#include "../../common/ArrayList.h" |
| 36 |
#include "../../common/ConditionServer.h" |
| 37 |
#include "../Engine.h" |
| 38 |
#include "../common/Event.h" |
| 39 |
#include "../../network/lscp.h" |
| 40 |
#include "EngineChannel.h" |
| 41 |
|
| 42 |
// identifier of this sampler engine |
| 43 |
#define LS_GIG_ENGINE_NAME "GIG" |
| 44 |
|
| 45 |
namespace LinuxSampler { namespace gig { |
| 46 |
|
| 47 |
// just symbol prototyping |
| 48 |
class Voice; |
| 49 |
class DiskThread; |
| 50 |
class InstrumentResourceManager; |
| 51 |
class midi_key_info_t; |
| 52 |
class EngineChannel; |
| 53 |
|
| 54 |
/** |
| 55 |
* Sampler engine for the Gigasampler format. |
| 56 |
*/ |
| 57 |
class Engine : public LinuxSampler::Engine { |
| 58 |
public: |
| 59 |
// methods |
| 60 |
Engine(); |
| 61 |
virtual ~Engine(); |
| 62 |
void Connect(AudioOutputDevice* pAudioOut); |
| 63 |
::gig::DimensionRegion** ChangeInstrument(EngineChannel* pEngineChannel, ::gig::Instrument* pInstrument); |
| 64 |
void SuspendAll(); |
| 65 |
void ResumeAll(); |
| 66 |
void Suspend(::gig::Region* pRegion); |
| 67 |
void Resume(::gig::Region* pRegion); |
| 68 |
|
| 69 |
// implementation of abstract methods derived from class 'LinuxSampler::Engine' |
| 70 |
virtual int RenderAudio(uint Samples); |
| 71 |
virtual void SendSysex(void* pData, uint Size); |
| 72 |
virtual void Reset(); |
| 73 |
virtual void Enable(); |
| 74 |
virtual void Disable(); |
| 75 |
virtual uint VoiceCount(); |
| 76 |
virtual uint VoiceCountMax(); |
| 77 |
virtual bool DiskStreamSupported(); |
| 78 |
virtual uint DiskStreamCount(); |
| 79 |
virtual uint DiskStreamCountMax(); |
| 80 |
virtual String DiskStreamBufferFillBytes(); |
| 81 |
virtual String DiskStreamBufferFillPercentage(); |
| 82 |
virtual String Description(); |
| 83 |
virtual String Version(); |
| 84 |
virtual String EngineName(); |
| 85 |
virtual InstrumentManager* GetInstrumentManager(); |
| 86 |
|
| 87 |
// Simple array wrapper just to make sure memory is freed |
| 88 |
// when liblinuxsampler is unloaded |
| 89 |
class FloatTable { |
| 90 |
private: |
| 91 |
const float* array; |
| 92 |
public: |
| 93 |
FloatTable(const float* array) : array(array) { } |
| 94 |
~FloatTable() { delete[] array; } |
| 95 |
const float& operator[](int i) const { return array[i]; } |
| 96 |
}; |
| 97 |
|
| 98 |
static const FloatTable VolumeCurve; ///< Table that maps volume control change values 0..127 to amplitude. Unity gain is at 90. |
| 99 |
static const FloatTable PanCurve; ///< Table that maps pan control change values 0..128 to right channel amplitude. Unity gain is at 64 (center). |
| 100 |
static const FloatTable CrossfadeCurve; ///< Table that maps crossfade control change values 0..127 to amplitude. Unity gain is at 127. |
| 101 |
|
| 102 |
//protected: |
| 103 |
static InstrumentResourceManager instruments; |
| 104 |
|
| 105 |
AudioOutputDevice* pAudioOutputDevice; |
| 106 |
uint SampleRate; ///< Sample rate of the engines output audio signal (in Hz) |
| 107 |
uint MaxSamplesPerCycle; ///< Size of each audio output buffer |
| 108 |
DiskThread* pDiskThread; |
| 109 |
RingBuffer<Event,false>* pEventQueue; ///< Input event queue for engine global events (e.g. SysEx messages). |
| 110 |
Pool<Voice>* pVoicePool; ///< Contains all voices that can be activated. |
| 111 |
EventGenerator* pEventGenerator; |
| 112 |
RTList<Event>* pVoiceStealingQueue; ///< All voice-launching events which had to be postponed due to free voice shortage. |
| 113 |
RTList<Event>* pGlobalEvents; ///< All engine global events for the current audio fragment (usually only SysEx messages). |
| 114 |
Pool<Event>* pEventPool; ///< Contains all Event objects that can be used. |
| 115 |
RingBuffer<uint8_t,false>* pSysexBuffer; ///< Input buffer for MIDI system exclusive messages. |
| 116 |
int ActiveVoiceCount; ///< number of currently active voices (this value will be returned for public calls) |
| 117 |
int ActiveVoiceCountTemp; ///< number of currently active voices (for internal usage, will be used for incrementation) |
| 118 |
int ActiveVoiceCountMax; ///< the maximum voice usage since application start |
| 119 |
int VoiceSpawnsLeft; ///< We only allow CONFIG_MAX_VOICES voices to be spawned per audio fragment, we use this variable to ensure this limit. |
| 120 |
RTList<Voice>::Iterator itLastStolenVoice; ///< Only for voice stealing: points to the last voice which was theft in current audio fragment, NULL otherwise. |
| 121 |
RTList<uint>::Iterator iuiLastStolenKey; ///< Only for voice stealing: key number of last key on which the last voice was theft in current audio fragment, NULL otherwise. |
| 122 |
EngineChannel* pLastStolenChannel; ///< Only for voice stealing: points to the engine channel on which the previous voice was stolen in this audio fragment. |
| 123 |
RTList<Voice>::Iterator itLastStolenVoiceGlobally; ///< Same as itLastStolenVoice, but engine globally |
| 124 |
RTList<uint>::Iterator iuiLastStolenKeyGlobally; ///< Same as iuiLastStolenKey, but engine globally |
| 125 |
bool SuspensionRequested; |
| 126 |
ConditionServer EngineDisabled; |
| 127 |
int8_t ScaleTuning[12]; ///< contains optional detune factors (-64..+63 cents) for all 12 semitones of an octave |
| 128 |
int MaxFadeOutPos; ///< The last position in an audio fragment to allow an instant fade out (e.g. for voice stealing) without leading to clicks. |
| 129 |
uint32_t RandomSeed; ///< State of the random number generator used by the random dimension. |
| 130 |
Mutex ResetInternalMutex; ///< Mutex to protect the ResetInternal function for concurrent usage (e.g. by the lscp and instrument loader threads). |
| 131 |
|
| 132 |
void ProcessEvents(EngineChannel* pEngineChannel, uint Samples); |
| 133 |
void RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples); |
| 134 |
void RenderStolenVoices(uint Samples); |
| 135 |
void RouteAudio(EngineChannel* pEngineChannel, uint Samples); |
| 136 |
void PostProcess(EngineChannel* pEngineChannel); |
| 137 |
void ClearEventLists(); |
| 138 |
void ImportEvents(uint Samples); |
| 139 |
void ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent); |
| 140 |
void ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent); |
| 141 |
void ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent); |
| 142 |
void ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent); |
| 143 |
void ProcessSysex(Pool<Event>::Iterator& itSysexEvent); |
| 144 |
void ProcessSuspensionsChanges(); |
| 145 |
void ProcessPendingStreamDeletions(); |
| 146 |
Pool<Voice>::Iterator LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts); |
| 147 |
int StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent); |
| 148 |
void FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice); |
| 149 |
void FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey); |
| 150 |
void ResetInternal(); |
| 151 |
void ResetScaleTuning(); |
| 152 |
void ResetSuspendedRegions(); |
| 153 |
|
| 154 |
static Engine* AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice); |
| 155 |
static void FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice); |
| 156 |
|
| 157 |
void DisableAndLock(); // FIXME: should at least be protected |
| 158 |
|
| 159 |
friend class Voice; |
| 160 |
private: |
| 161 |
|
| 162 |
/// Command used by the instrument loader thread to |
| 163 |
/// request an instrument change on a channel. |
| 164 |
struct instrument_change_command_t { |
| 165 |
EngineChannel* pEngineChannel; |
| 166 |
::gig::Instrument* pInstrument; |
| 167 |
}; |
| 168 |
struct instrument_change_reply_t { |
| 169 |
int dummy; |
| 170 |
}; |
| 171 |
RingBuffer<instrument_change_command_t,false>* InstrumentChangeQueue; ///< Contains the instrument change command |
| 172 |
RingBuffer<instrument_change_reply_t,false>* InstrumentChangeReplyQueue; ///< Contains the acknowledge of an instrument change |
| 173 |
::gig::DimensionRegion** pDimRegionsInUse; ///< After an instrument change, this contains a list of dimension regions that are still in use by playing voices |
| 174 |
|
| 175 |
Pool< ::gig::Region*> SuspendedRegions; |
| 176 |
Mutex SuspendedRegionsMutex; |
| 177 |
Condition SuspensionChangeOngoing; |
| 178 |
::gig::Region* pPendingRegionSuspension; |
| 179 |
::gig::Region* pPendingRegionResumption; |
| 180 |
int iPendingStreamDeletions; |
| 181 |
|
| 182 |
ArrayList<EngineChannel*> engineChannels; ///< All engine channels of a gig::Engine instance. |
| 183 |
|
| 184 |
static std::map<AudioOutputDevice*,Engine*> engines; ///< All instances of gig::Engine. |
| 185 |
|
| 186 |
int SostenutoKeys[128]; |
| 187 |
int SostenutoKeyCount; |
| 188 |
|
| 189 |
uint8_t GSCheckSum(const RingBuffer<uint8_t,false>::NonVolatileReader AddrReader, uint DataSize); |
| 190 |
void AdjustScale(int8_t ScaleTunes[12]); |
| 191 |
void ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent); |
| 192 |
void KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent); |
| 193 |
bool ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key); |
| 194 |
bool RegionSuspended(::gig::Region* pRegion); |
| 195 |
static float* InitVolumeCurve(); |
| 196 |
static float* InitPanCurve(); |
| 197 |
static float* InitCrossfadeCurve(); |
| 198 |
static float* InitCurve(const float* segments, int size = 128); |
| 199 |
|
| 200 |
unsigned long FrameTime; ///< Time in frames of the start of the current audio fragment |
| 201 |
}; |
| 202 |
|
| 203 |
}} // namespace LinuxSampler::gig |
| 204 |
|
| 205 |
#endif // __LS_GIG_ENGINE_H__ |
Parent Directory
| 
Revision Log