trunk/src/audiothread.cpp

/***************************************************************************
 *                                                                         *
 *   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                                                   *
 ***************************************************************************/

#include "audiothread.h"

AudioThread::AudioThread(AudioIO* pAudioIO, DiskThread* pDiskThread, gig::Instrument* pInstrument) {
    this->pAudioIO    = pAudioIO;
    this->pDiskThread = pDiskThread;
    this->pInstrument = pInstrument;
    pCommandQueue     = new RingBuffer<command_t>(1024);
    pVoices           = new Voice*[MAX_AUDIO_VOICES];
    // allocate the ActiveVoicePool (for each midi key there is a variable size linked list
    // of pointers to Voice objects)
    ActiveVoicePool = new RTELMemoryPool<Voice*>(MAX_AUDIO_VOICES);
    for (uint i = 0; i < MAX_AUDIO_VOICES; i++) {
        pVoices[i] = new Voice(pDiskThread);
    }
    for (uint i = 0; i < 128; i++) {
        pMIDIKeyInfo[i].pActiveVoices    = new RTEList<Voice*>;
        pMIDIKeyInfo[i].hSustainPtr      = NULL;
        pMIDIKeyInfo[i].Sustained        = false;
        pMIDIKeyInfo[i].KeyPressed       = false;
        pMIDIKeyInfo[i].pSustainPoolNode = NULL;
    }
    SustainedKeyPool = new RTELMemoryPool<uint>(128);

    // FIXME: assuming stereo output
    pAudioSumBuffer[0] = new float[pAudioIO->MaxSamplesPerCycle() * pAudioIO->Channels()];
    pAudioSumBuffer[1] = &pAudioSumBuffer[0][pAudioIO->MaxSamplesPerCycle()];

    // set all voice outputs to the AudioSumBuffer
    for (int i = 0; i < MAX_AUDIO_VOICES; i++) { //FIXME: assuming stereo
        pVoices[i]->SetOutputLeft(pAudioSumBuffer[0],  pAudioIO->MaxSamplesPerCycle());
        pVoices[i]->SetOutputRight(pAudioSumBuffer[1], pAudioIO->MaxSamplesPerCycle());
    }

    // cache initial samples points (for actually needed samples)
    dmsg(1,("Caching initial samples..."));
    gig::Region* pRgn = this->pInstrument->GetFirstRegion();
    while (pRgn) {
        if (!pRgn->GetSample()->GetCache().Size) {
            dmsg(2,("C"));
            CacheInitialSamples(pRgn->GetSample());
        }
        for (uint i = 0; i < pRgn->DimensionRegions; i++) {
            CacheInitialSamples(pRgn->pDimensionRegions[i]->pSample);
        }

        pRgn = this->pInstrument->GetNextRegion();
    }

    // initialize modulation system
    ModulationSystem::Initialize(pAudioIO->SampleRate(), pAudioIO->MaxSamplesPerCycle());

    // sustain pedal value
    PrevHoldCCValue = 0;
    SustainPedal    = 0;

    dmsg(1,("OK\n"));
}

AudioThread::~AudioThread() {
    ModulationSystem::Close();
    if (pCommandQueue) delete pCommandQueue;
    if (pVoices) {
        for (uint i = 0; i < MAX_AUDIO_VOICES; i++) {
            if (pVoices[i]) delete pVoices[i];
        }
    }
    delete[] pVoices;
    delete[] pAudioSumBuffer[0]; // this also frees the right channel buffer
}

int AudioThread::RenderAudio(uint Samples) {

    // read and process commands from the queue
    while (true) {
        command_t command;
        if (!pCommandQueue->pop(&command)) break;

        switch (command.type) {
            case command_type_note_on:
                dmsg(5,("Audio Thread: Note on received\n"));
                ProcessNoteOn(command.pitch, command.velocity);
                break;
            case command_type_note_off:
                dmsg(5,("Audio Thread: Note off received\n"));
                ProcessNoteOff(command.pitch, command.velocity);
                break;
            case command_type_continuous_controller:
                dmsg(5,("Audio Thread: MIDI CC received\n"));
                ProcessControlChange(command.channel, command.number, command.value);
                break;
        }
    }


    // zero out the output sum buffer (left and right channel)
    memset(pAudioSumBuffer[0], 0, Samples * pAudioIO->Channels() * sizeof(float));


    // render audio from all active voices
    int active_voices = 0;
    for (uint i = 0; i < MAX_AUDIO_VOICES; i++) {
        if (pVoices[i]->IsActive()) {
            pVoices[i]->Render(Samples);
            if (pVoices[i]->IsActive()) active_voices++; // still active
            else { // voice reached end, is now inactive
                KillVoice(pVoices[i]); // remove voice from the list of active voices
            }
        }
    }
    // write that to the disk thread class so that it can print it
    // on the console for debugging purposes
    ActiveVoiceCount = active_voices;
    if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;


    return 0;
}

/// Will be called by the MIDIIn Thread to let the audio thread trigger a new voice.
void AudioThread::SendNoteOn(uint8_t Pitch, uint8_t Velocity) {
    command_t cmd;
    cmd.type     = command_type_note_on;
    cmd.pitch    = Pitch;
    cmd.velocity = Velocity;
    if (this->pCommandQueue->write_space() > 0) this->pCommandQueue->push(&cmd);
    else dmsg(1,("AudioThread: Command queue full!"));
}

/// Will be called by the MIDIIn Thread to signal the audio thread to release voice(s).
void AudioThread::SendNoteOff(uint8_t Pitch, uint8_t Velocity) {
    command_t cmd;
    cmd.type     = command_type_note_off;
    cmd.pitch    = Pitch;
    cmd.velocity = Velocity;
    if (this->pCommandQueue->write_space() > 0) this->pCommandQueue->push(&cmd);
    else dmsg(1,("AudioThread: Command queue full!"));
}

// Will be called by the MIDIIn Thread to signal the audio thread that a continuous controller value has changed.
void AudioThread::SendControlChange(uint8_t Channel, uint8_t Number, uint8_t Value) {
    command_t cmd;
    cmd.type     = command_type_continuous_controller;
    cmd.channel  = Channel;
    cmd.number   = Number;
    cmd.value    = Value;
    if (this->pCommandQueue->write_space() > 0) this->pCommandQueue->push(&cmd);
    else dmsg(1,("AudioThread: Command queue full!"));
}

/**
 *  Assigns and triggers a new voice for the respective MIDI key.
 */
void AudioThread::ProcessNoteOn(uint8_t MIDIKey, uint8_t Velocity) {
    pMIDIKeyInfo[MIDIKey].KeyPressed = true; // the MIDI key was currently pressed down
    for (int i = 0; i < MAX_AUDIO_VOICES; i++) {
        if (pVoices[i]->IsActive()) continue; // search for a free voice

        // launch the new voice
        if (pVoices[i]->Trigger(MIDIKey, Velocity, this->pInstrument) < 0) {
            return; // failed to trigger the new voice
        }

        // add (append) a new voice to the corresponding MIDIKey active voices list
        Voice** new_voice_ptr = ActiveVoicePool->alloc_append(pMIDIKeyInfo[MIDIKey].pActiveVoices);
        *new_voice_ptr = pVoices[i];
        pVoices[i]->pSelfPtr = new_voice_ptr; // FIXME: hack to allow fast deallocation

        // update key info
        if (!pMIDIKeyInfo[MIDIKey].hSustainPtr) {
            dmsg(4,("ActivateVoice(uint,uint): hSustainPtr == null, setting release pointer to the last voice on the key...\n"));
            pMIDIKeyInfo[MIDIKey].pActiveVoices->last();
            pMIDIKeyInfo[MIDIKey].hSustainPtr = pMIDIKeyInfo[MIDIKey].pActiveVoices->current();
        }
        return;
    }
    std::cerr << "No free voice!" << std::endl << std::flush;
}

/**
 *  Releases the voices on the given key if sustain pedal is not pressed.
 *  If sustain is pressed, the release of the note will be postponed until
 *  sustain pedal will be released or voice turned inactive by itself (e.g.
 *  due to completion of sample playback).
 */
void AudioThread::ProcessNoteOff(uint8_t MIDIKey, uint8_t Velocity) {
    pMIDIKeyInfo[MIDIKey].KeyPressed = false; // the MIDI key was currently released
    midi_key_info_t* pmidikey = &pMIDIKeyInfo[MIDIKey];
    if (SustainPedal) { // if sustain pedal is pressed postpone the Note-Off
        if (pmidikey->hSustainPtr) {
            // stick the note-off information to the respective voice
            Voice** pVoiceToRelease = pmidikey->pActiveVoices->set_current(pmidikey->hSustainPtr);
            if (pVoiceToRelease) {
                (*pVoiceToRelease)->ReleaseVelocity = Velocity;
                // now increment the sustain pointer
                pmidikey->pActiveVoices->next();
                pmidikey->hSustainPtr = pmidikey->pActiveVoices->current();
                // if the key was not sustained yet, add it's MIDI key number to the sustained key pool
                if (!pmidikey->Sustained) {
                    uint* sustainedmidikey     = SustainedKeyPool->alloc();
                    *sustainedmidikey          = MIDIKey;
                    pmidikey->pSustainPoolNode = sustainedmidikey;
                    pmidikey->Sustained        = true;
                }
            }
            else dmsg(3,("Ignoring NOTE OFF --> pVoiceToRelease == null!\n"));
        }
        else dmsg(3,("Ignoring NOTE OFF, seems like more Note-Offs than Note-Ons or no free voices available?\n"));
    }
    else {
        // release all active voices on the midi key
        Voice** pVoicePtr = pmidikey->pActiveVoices->first();
        while (pVoicePtr) {
            Voice** pVoicePtrNext = pMIDIKeyInfo[MIDIKey].pActiveVoices->next();
            (*pVoicePtr)->Release();
            pVoicePtr = pVoicePtrNext;
        }
    }
}

/**
 *  Immediately kills the voice given with pVoice (no matter if sustain is
 *  pressed or not) and removes it from the MIDI key's list of active voice.
 *  This method will e.g. be called if a voice went inactive by itself. If
 *  sustain pedal is pressed the method takes care to free those sustain
 *  informations of the voice.
 */
void AudioThread::KillVoice(Voice* pVoice) {
    if (pVoice) {
        if (pVoice->IsActive()) pVoice->Kill();

        if (pMIDIKeyInfo[pVoice->MIDIKey].Sustained) {
            // check if the sustain pointer has to be moved, now that we kill the voice
            RTEList<Voice*>::NodeHandle hSustainPtr = pMIDIKeyInfo[pVoice->MIDIKey].hSustainPtr;
            if (hSustainPtr) {
                Voice** pVoicePtr = pMIDIKeyInfo[pVoice->MIDIKey].pActiveVoices->set_current(hSustainPtr);
                if (pVoicePtr) {
                    if (*pVoicePtr == pVoice) { // move sustain pointer to the next sustained voice
                        dmsg(3,("Correcting sustain pointer\n"));
                        pMIDIKeyInfo[pVoice->MIDIKey].pActiveVoices->next();
                        pMIDIKeyInfo[pVoice->MIDIKey].hSustainPtr = pMIDIKeyInfo[pVoice->MIDIKey].pActiveVoices->current();
                    }
                    else dmsg(4,("ReleaseVoice(Voice*): *hSustain != pVoice\n"));
                }
                else dmsg(3,("ReleaseVoice(Voice*): pVoicePtr == null\n"));
            }
            else dmsg(3,("ReleaseVoice(Voice*): hSustainPtr == null\n"));
        }

        // remove the voice from the list associated with this MIDI key
        ActiveVoicePool->free(pVoice->pSelfPtr);

        // check if there are no voices left on the MIDI key and update the key info if so
        if (pMIDIKeyInfo[pVoice->MIDIKey].pActiveVoices->is_empty()) {
            pMIDIKeyInfo[pVoice->MIDIKey].hSustainPtr = NULL;
            if (pMIDIKeyInfo[pVoice->MIDIKey].Sustained) {
                SustainedKeyPool->free(pMIDIKeyInfo[pVoice->MIDIKey].pSustainPoolNode);
                pMIDIKeyInfo[pVoice->MIDIKey].pSustainPoolNode = NULL;
                pMIDIKeyInfo[pVoice->MIDIKey].Sustained        = false;
            }
            dmsg(3,("Key has no more voices now\n"));
        }
    }
    else std::cerr << "Couldn't release voice! (pVoice == NULL)\n" << std::flush;
}

void AudioThread::ProcessControlChange(uint8_t Channel, uint8_t Number, uint8_t Value) {
    dmsg(4,("AudioThread::ContinuousController c=%d n=%d v=%d\n", Channel, Number, Value));
    if (Number == 64) {
        if (Value >= 64 && PrevHoldCCValue < 64) {
            dmsg(4,("PEDAL DOWN\n"));
            SustainPedal = true;
        }
        if (Value < 64 && PrevHoldCCValue >= 64) {
            dmsg(4,("PEDAL UP\n"));
            SustainPedal = false;
            // iterate through all keys that are currently sustained
            for (uint* key = SustainedKeyPool->first(); key; key = SustainedKeyPool->next()) {
                if (!pMIDIKeyInfo[*key].KeyPressed) { // release the voices on the key, if the key is not pressed anymore
                    // release all active voices on the midi key
                    Voice** pVoicePtr = pMIDIKeyInfo[*key].pActiveVoices->first();
                    while (pVoicePtr) {
                        Voice** pVoicePtrNext = pMIDIKeyInfo[*key].pActiveVoices->next();
                        dmsg(3,("Sustain CC: releasing voice on midi key %d\n", *key));
                        (*pVoicePtr)->Release();
                        pVoicePtr = pVoicePtrNext;
                    }
                    SustainedKeyPool->free(pMIDIKeyInfo[*key].pSustainPoolNode);
                    pMIDIKeyInfo[*key].pSustainPoolNode = NULL;
                    pMIDIKeyInfo[*key].Sustained        = false;
                    pMIDIKeyInfo[*key].hSustainPtr      = NULL;
                }
            }
            //SustainedKeyPool->empty();
        }
        PrevHoldCCValue = Value;
    }
}

void AudioThread::CacheInitialSamples(gig::Sample* pSample) {
    if (!pSample || pSample->GetCache().Size) return;
    if (pSample->SamplesTotal <= NUM_RAM_PRELOAD_SAMPLES) {
        // Sample is too short for disk streaming, so we load the whole
        // sample into RAM and place 'pAudioIO->FragmentSize << MAX_PITCH'
        // number of '0' samples (silence samples) behind the official buffer
        // border, to allow the interpolator do it's work even at the end of
        // the sample.
        gig::buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension((pAudioIO->MaxSamplesPerCycle() << MAX_PITCH) + 3);
        dmsg(4,("Cached %d Bytes, %d silence bytes.\n", buf.Size, buf.NullExtensionSize));
    }
    else { // we only cache NUM_RAM_PRELOAD_SAMPLES and stream the other sample points from disk
        pSample->LoadSampleData(NUM_RAM_PRELOAD_SAMPLES);
    }

    if (!pSample->GetCache().Size) std::cerr << "Unable to cache sample - maybe memory full!" << std::endl << std::flush;
}
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			#include "audiothread.h"
24
25	schoenebeck	31	AudioThread::AudioThread(AudioIO* pAudioIO, DiskThread* pDiskThread, gig::Instrument* pInstrument) {
26	schoenebeck	9	this->pAudioIO = pAudioIO;
27			this->pDiskThread = pDiskThread;
28			this->pInstrument = pInstrument;
29			pCommandQueue = new RingBuffer<command_t>(1024);
30			pVoices = new Voice*[MAX_AUDIO_VOICES];
31	senoner	10	// allocate the ActiveVoicePool (for each midi key there is a variable size linked list
32	schoenebeck	12	// of pointers to Voice objects)
33			ActiveVoicePool = new RTELMemoryPool<Voice*>(MAX_AUDIO_VOICES);
34	schoenebeck	9	for (uint i = 0; i < MAX_AUDIO_VOICES; i++) {
35			pVoices[i] = new Voice(pDiskThread);
36			}
37			for (uint i = 0; i < 128; i++) {
38	schoenebeck	18	pMIDIKeyInfo[i].pActiveVoices = new RTEList<Voice*>;
39			pMIDIKeyInfo[i].hSustainPtr = NULL;
40			pMIDIKeyInfo[i].Sustained = false;
41			pMIDIKeyInfo[i].KeyPressed = false;
42			pMIDIKeyInfo[i].pSustainPoolNode = NULL;
43	schoenebeck	9	}
44	schoenebeck	15	SustainedKeyPool = new RTELMemoryPool<uint>(128);
45	schoenebeck	9
46	schoenebeck	31	// FIXME: assuming stereo output
47			pAudioSumBuffer[0] = new float[pAudioIO->MaxSamplesPerCycle() * pAudioIO->Channels()];
48			pAudioSumBuffer[1] = &pAudioSumBuffer[0][pAudioIO->MaxSamplesPerCycle()];
49	schoenebeck	9
50			// set all voice outputs to the AudioSumBuffer
51	schoenebeck	31	for (int i = 0; i < MAX_AUDIO_VOICES; i++) { //FIXME: assuming stereo
52			pVoices[i]->SetOutputLeft(pAudioSumBuffer[0], pAudioIO->MaxSamplesPerCycle());
53			pVoices[i]->SetOutputRight(pAudioSumBuffer[1], pAudioIO->MaxSamplesPerCycle());
54	schoenebeck	9	}
55
56			// cache initial samples points (for actually needed samples)
57	schoenebeck	12	dmsg(1,("Caching initial samples..."));
58	schoenebeck	9	gig::Region* pRgn = this->pInstrument->GetFirstRegion();
59			while (pRgn) {
60			if (!pRgn->GetSample()->GetCache().Size) {
61	schoenebeck	12	dmsg(2,("C"));
62	schoenebeck	9	CacheInitialSamples(pRgn->GetSample());
63			}
64			for (uint i = 0; i < pRgn->DimensionRegions; i++) {
65			CacheInitialSamples(pRgn->pDimensionRegions[i]->pSample);
66			}
67
68			pRgn = this->pInstrument->GetNextRegion();
69			}
70	senoner	10
71	schoenebeck	30	// initialize modulation system
72	schoenebeck	31	ModulationSystem::Initialize(pAudioIO->SampleRate(), pAudioIO->MaxSamplesPerCycle());
73	schoenebeck	30
74	senoner	10	// sustain pedal value
75	schoenebeck	12	PrevHoldCCValue = 0;
76			SustainPedal = 0;
77	senoner	10
78	schoenebeck	12	dmsg(1,("OK\n"));
79	schoenebeck	9	}
80
81			AudioThread::~AudioThread() {
82	schoenebeck	30	ModulationSystem::Close();
83	schoenebeck	9	if (pCommandQueue) delete pCommandQueue;
84			if (pVoices) {
85			for (uint i = 0; i < MAX_AUDIO_VOICES; i++) {
86			if (pVoices[i]) delete pVoices[i];
87			}
88			}
89			delete[] pVoices;
90	schoenebeck	31	delete[] pAudioSumBuffer[0]; // this also frees the right channel buffer
91	schoenebeck	9	}
92
93	schoenebeck	31	int AudioThread::RenderAudio(uint Samples) {
94	schoenebeck	9
95	schoenebeck	31	// read and process commands from the queue
96	schoenebeck	9	while (true) {
97	schoenebeck	31	command_t command;
98			if (!pCommandQueue->pop(&command)) break;
99	schoenebeck	9
100	schoenebeck	31	switch (command.type) {
101			case command_type_note_on:
102			dmsg(5,("Audio Thread: Note on received\n"));
103			ProcessNoteOn(command.pitch, command.velocity);
104			break;
105			case command_type_note_off:
106			dmsg(5,("Audio Thread: Note off received\n"));
107			ProcessNoteOff(command.pitch, command.velocity);
108			break;
109			case command_type_continuous_controller:
110			dmsg(5,("Audio Thread: MIDI CC received\n"));
111			ProcessControlChange(command.channel, command.number, command.value);
112			break;
113	schoenebeck	9	}
114	schoenebeck	31	}
115	schoenebeck	9
116
117	schoenebeck	31	// zero out the output sum buffer (left and right channel)
118			memset(pAudioSumBuffer[0], 0, Samples * pAudioIO->Channels() * sizeof(float));
119	schoenebeck	9
120
121	schoenebeck	31	// render audio from all active voices
122			int active_voices = 0;
123			for (uint i = 0; i < MAX_AUDIO_VOICES; i++) {
124			if (pVoices[i]->IsActive()) {
125			pVoices[i]->Render(Samples);
126			if (pVoices[i]->IsActive()) active_voices++; // still active
127			else { // voice reached end, is now inactive
128			KillVoice(pVoices[i]); // remove voice from the list of active voices
129	schoenebeck	9	}
130			}
131	schoenebeck	31	}
132			// write that to the disk thread class so that it can print it
133			// on the console for debugging purposes
134			ActiveVoiceCount = active_voices;
135			if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
136	schoenebeck	9
137
138	schoenebeck	31	return 0;
139	schoenebeck	9	}
140
141			/// Will be called by the MIDIIn Thread to let the audio thread trigger a new voice.
142	schoenebeck	18	void AudioThread::SendNoteOn(uint8_t Pitch, uint8_t Velocity) {
143	schoenebeck	9	command_t cmd;
144			cmd.type = command_type_note_on;
145			cmd.pitch = Pitch;
146			cmd.velocity = Velocity;
147	schoenebeck	18	if (this->pCommandQueue->write_space() > 0) this->pCommandQueue->push(&cmd);
148			else dmsg(1,("AudioThread: Command queue full!"));
149	schoenebeck	9	}
150
151	schoenebeck	18	/// Will be called by the MIDIIn Thread to signal the audio thread to release voice(s).
152			void AudioThread::SendNoteOff(uint8_t Pitch, uint8_t Velocity) {
153	schoenebeck	9	command_t cmd;
154			cmd.type = command_type_note_off;
155			cmd.pitch = Pitch;
156			cmd.velocity = Velocity;
157	schoenebeck	18	if (this->pCommandQueue->write_space() > 0) this->pCommandQueue->push(&cmd);
158			else dmsg(1,("AudioThread: Command queue full!"));
159	schoenebeck	9	}
160
161	schoenebeck	18	// Will be called by the MIDIIn Thread to signal the audio thread that a continuous controller value has changed.
162			void AudioThread::SendControlChange(uint8_t Channel, uint8_t Number, uint8_t Value) {
163	senoner	10	command_t cmd;
164			cmd.type = command_type_continuous_controller;
165			cmd.channel = Channel;
166			cmd.number = Number;
167			cmd.value = Value;
168	schoenebeck	18	if (this->pCommandQueue->write_space() > 0) this->pCommandQueue->push(&cmd);
169			else dmsg(1,("AudioThread: Command queue full!"));
170	senoner	10	}
171
172	schoenebeck	18	/**
173			* Assigns and triggers a new voice for the respective MIDI key.
174			*/
175			void AudioThread::ProcessNoteOn(uint8_t MIDIKey, uint8_t Velocity) {
176			pMIDIKeyInfo[MIDIKey].KeyPressed = true; // the MIDI key was currently pressed down
177	schoenebeck	9	for (int i = 0; i < MAX_AUDIO_VOICES; i++) {
178	schoenebeck	18	if (pVoices[i]->IsActive()) continue; // search for a free voice
179	schoenebeck	15
180	schoenebeck	18	// launch the new voice
181			if (pVoices[i]->Trigger(MIDIKey, Velocity, this->pInstrument) < 0) {
182			return; // failed to trigger the new voice
183			}
184
185	senoner	10	// add (append) a new voice to the corresponding MIDIKey active voices list
186	schoenebeck	15	Voice** new_voice_ptr = ActiveVoicePool->alloc_append(pMIDIKeyInfo[MIDIKey].pActiveVoices);
187	schoenebeck	12	*new_voice_ptr = pVoices[i];
188			pVoices[i]->pSelfPtr = new_voice_ptr; // FIXME: hack to allow fast deallocation
189	schoenebeck	15
190	schoenebeck	18	// update key info
191	schoenebeck	15	if (!pMIDIKeyInfo[MIDIKey].hSustainPtr) {
192			dmsg(4,("ActivateVoice(uint,uint): hSustainPtr == null, setting release pointer to the last voice on the key...\n"));
193			pMIDIKeyInfo[MIDIKey].pActiveVoices->last();
194			pMIDIKeyInfo[MIDIKey].hSustainPtr = pMIDIKeyInfo[MIDIKey].pActiveVoices->current();
195			}
196	schoenebeck	9	return;
197			}
198			std::cerr << "No free voice!" << std::endl << std::flush;
199			}
200
201	schoenebeck	15	/**
202			* Releases the voices on the given key if sustain pedal is not pressed.
203			* If sustain is pressed, the release of the note will be postponed until
204			* sustain pedal will be released or voice turned inactive by itself (e.g.
205			* due to completion of sample playback).
206			*/
207	schoenebeck	18	void AudioThread::ProcessNoteOff(uint8_t MIDIKey, uint8_t Velocity) {
208			pMIDIKeyInfo[MIDIKey].KeyPressed = false; // the MIDI key was currently released
209	schoenebeck	15	midi_key_info_t* pmidikey = &pMIDIKeyInfo[MIDIKey];
210			if (SustainPedal) { // if sustain pedal is pressed postpone the Note-Off
211			if (pmidikey->hSustainPtr) {
212			// stick the note-off information to the respective voice
213			Voice** pVoiceToRelease = pmidikey->pActiveVoices->set_current(pmidikey->hSustainPtr);
214			if (pVoiceToRelease) {
215			(*pVoiceToRelease)->ReleaseVelocity = Velocity;
216			// now increment the sustain pointer
217			pmidikey->pActiveVoices->next();
218			pmidikey->hSustainPtr = pmidikey->pActiveVoices->current();
219			// if the key was not sustained yet, add it's MIDI key number to the sustained key pool
220			if (!pmidikey->Sustained) {
221	schoenebeck	18	uint* sustainedmidikey = SustainedKeyPool->alloc();
222			*sustainedmidikey = MIDIKey;
223			pmidikey->pSustainPoolNode = sustainedmidikey;
224			pmidikey->Sustained = true;
225	schoenebeck	15	}
226			}
227			else dmsg(3,("Ignoring NOTE OFF --> pVoiceToRelease == null!\n"));
228			}
229			else dmsg(3,("Ignoring NOTE OFF, seems like more Note-Offs than Note-Ons or no free voices available?\n"));
230	schoenebeck	12	}
231			else {
232	schoenebeck	18	// release all active voices on the midi key
233	schoenebeck	15	Voice** pVoicePtr = pmidikey->pActiveVoices->first();
234	schoenebeck	18	while (pVoicePtr) {
235			Voice** pVoicePtrNext = pMIDIKeyInfo[MIDIKey].pActiveVoices->next();
236	schoenebeck	30	(*pVoicePtr)->Release();
237	schoenebeck	18	pVoicePtr = pVoicePtrNext;
238			}
239	schoenebeck	12	}
240			}
241	senoner	10
242	schoenebeck	15	/**
243	schoenebeck	30	* Immediately kills the voice given with pVoice (no matter if sustain is
244			* pressed or not) and removes it from the MIDI key's list of active voice.
245			* This method will e.g. be called if a voice went inactive by itself. If
246			* sustain pedal is pressed the method takes care to free those sustain
247			* informations of the voice.
248	schoenebeck	15	*/
249	schoenebeck	30	void AudioThread::KillVoice(Voice* pVoice) {
250	schoenebeck	9	if (pVoice) {
251	schoenebeck	30	if (pVoice->IsActive()) pVoice->Kill();
252	senoner	10
253	schoenebeck	15	if (pMIDIKeyInfo[pVoice->MIDIKey].Sustained) {
254	schoenebeck	30	// check if the sustain pointer has to be moved, now that we kill the voice
255	schoenebeck	15	RTEList<Voice*>::NodeHandle hSustainPtr = pMIDIKeyInfo[pVoice->MIDIKey].hSustainPtr;
256			if (hSustainPtr) {
257			Voice** pVoicePtr = pMIDIKeyInfo[pVoice->MIDIKey].pActiveVoices->set_current(hSustainPtr);
258			if (pVoicePtr) {
259			if (*pVoicePtr == pVoice) { // move sustain pointer to the next sustained voice
260			dmsg(3,("Correcting sustain pointer\n"));
261			pMIDIKeyInfo[pVoice->MIDIKey].pActiveVoices->next();
262			pMIDIKeyInfo[pVoice->MIDIKey].hSustainPtr = pMIDIKeyInfo[pVoice->MIDIKey].pActiveVoices->current();
263			}
264			else dmsg(4,("ReleaseVoice(Voice): hSustain != pVoice\n"));
265			}
266			else dmsg(3,("ReleaseVoice(Voice*): pVoicePtr == null\n"));
267			}
268			else dmsg(3,("ReleaseVoice(Voice*): hSustainPtr == null\n"));
269	schoenebeck	18	}
270	schoenebeck	15
271	schoenebeck	18	// remove the voice from the list associated with this MIDI key
272			ActiveVoicePool->free(pVoice->pSelfPtr);
273	schoenebeck	15
274	schoenebeck	18	// check if there are no voices left on the MIDI key and update the key info if so
275			if (pMIDIKeyInfo[pVoice->MIDIKey].pActiveVoices->is_empty()) {
276			pMIDIKeyInfo[pVoice->MIDIKey].hSustainPtr = NULL;
277			if (pMIDIKeyInfo[pVoice->MIDIKey].Sustained) {
278			SustainedKeyPool->free(pMIDIKeyInfo[pVoice->MIDIKey].pSustainPoolNode);
279			pMIDIKeyInfo[pVoice->MIDIKey].pSustainPoolNode = NULL;
280			pMIDIKeyInfo[pVoice->MIDIKey].Sustained = false;
281	schoenebeck	15	}
282	schoenebeck	18	dmsg(3,("Key has no more voices now\n"));
283	schoenebeck	15	}
284	schoenebeck	9	}
285	schoenebeck	15	else std::cerr << "Couldn't release voice! (pVoice == NULL)\n" << std::flush;
286	schoenebeck	9	}
287
288	schoenebeck	18	void AudioThread::ProcessControlChange(uint8_t Channel, uint8_t Number, uint8_t Value) {
289	schoenebeck	12	dmsg(4,("AudioThread::ContinuousController c=%d n=%d v=%d\n", Channel, Number, Value));
290			if (Number == 64) {
291			if (Value >= 64 && PrevHoldCCValue < 64) {
292			dmsg(4,("PEDAL DOWN\n"));
293			SustainPedal = true;
294			}
295			if (Value < 64 && PrevHoldCCValue >= 64) {
296			dmsg(4,("PEDAL UP\n"));
297			SustainPedal = false;
298	schoenebeck	15	// iterate through all keys that are currently sustained
299			for (uint* key = SustainedKeyPool->first(); key; key = SustainedKeyPool->next()) {
300	schoenebeck	18	if (!pMIDIKeyInfo[*key].KeyPressed) { // release the voices on the key, if the key is not pressed anymore
301			// release all active voices on the midi key
302			Voice** pVoicePtr = pMIDIKeyInfo[*key].pActiveVoices->first();
303			while (pVoicePtr) {
304			Voice** pVoicePtrNext = pMIDIKeyInfo[*key].pActiveVoices->next();
305			dmsg(3,("Sustain CC: releasing voice on midi key %d\n", *key));
306	schoenebeck	30	(*pVoicePtr)->Release();
307	schoenebeck	18	pVoicePtr = pVoicePtrNext;
308			}
309	schoenebeck	31	SustainedKeyPool->free(pMIDIKeyInfo[*key].pSustainPoolNode);
310			pMIDIKeyInfo[*key].pSustainPoolNode = NULL;
311			pMIDIKeyInfo[*key].Sustained = false;
312			pMIDIKeyInfo[*key].hSustainPtr = NULL;
313	schoenebeck	15	}
314	schoenebeck	12	}
315	schoenebeck	30	//SustainedKeyPool->empty();
316	schoenebeck	12	}
317			PrevHoldCCValue = Value;
318	senoner	10	}
319			}
320
321	schoenebeck	9	void AudioThread::CacheInitialSamples(gig::Sample* pSample) {
322			if (!pSample \|\| pSample->GetCache().Size) return;
323			if (pSample->SamplesTotal <= NUM_RAM_PRELOAD_SAMPLES) {
324			// Sample is too short for disk streaming, so we load the whole
325			// sample into RAM and place 'pAudioIO->FragmentSize << MAX_PITCH'
326			// number of '0' samples (silence samples) behind the official buffer
327			// border, to allow the interpolator do it's work even at the end of
328			// the sample.
329	schoenebeck	31	gig::buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension((pAudioIO->MaxSamplesPerCycle() << MAX_PITCH) + 3);
330	schoenebeck	12	dmsg(4,("Cached %d Bytes, %d silence bytes.\n", buf.Size, buf.NullExtensionSize));
331	schoenebeck	9	}
332			else { // we only cache NUM_RAM_PRELOAD_SAMPLES and stream the other sample points from disk
333			pSample->LoadSampleData(NUM_RAM_PRELOAD_SAMPLES);
334			}
335
336			if (!pSample->GetCache().Size) std::cerr << "Unable to cache sample - maybe memory full!" << std::endl << std::flush;
337			}