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	/***************************************************************************
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	AudioThread::AudioThread(AudioIO* pAudioIO, DiskThread* pDiskThread, gig::Instrument* pInstrument) {
26	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	// allocate the ActiveVoicePool (for each midi key there is a variable size linked list
32	// of pointers to Voice objects)
33	ActiveVoicePool = new RTELMemoryPool<Voice*>(MAX_AUDIO_VOICES);
34	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	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	}
44	SustainedKeyPool = new RTELMemoryPool<uint>(128);
45
46	// FIXME: assuming stereo output
47	pAudioSumBuffer[0] = new float[pAudioIO->MaxSamplesPerCycle() * pAudioIO->Channels()];
48	pAudioSumBuffer[1] = &pAudioSumBuffer[0][pAudioIO->MaxSamplesPerCycle()];
49
50	// set all voice outputs to the AudioSumBuffer
51	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	}
55
56	// cache initial samples points (for actually needed samples)
57	dmsg(1,("Caching initial samples..."));
58	gig::Region* pRgn = this->pInstrument->GetFirstRegion();
59	while (pRgn) {
60	if (!pRgn->GetSample()->GetCache().Size) {
61	dmsg(2,("C"));
62	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
71	// initialize modulation system
72	ModulationSystem::Initialize(pAudioIO->SampleRate(), pAudioIO->MaxSamplesPerCycle());
73
74	// sustain pedal value
75	PrevHoldCCValue = 0;
76	SustainPedal = 0;
77
78	dmsg(1,("OK\n"));
79	}
80
81	AudioThread::~AudioThread() {
82	ModulationSystem::Close();
83	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	delete[] pAudioSumBuffer[0]; // this also frees the right channel buffer
91	}
92
93	int AudioThread::RenderAudio(uint Samples) {
94
95	// read and process commands from the queue
96	while (true) {
97	command_t command;
98	if (!pCommandQueue->pop(&command)) break;
99
100	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	}
114	}
115
116
117	// zero out the output sum buffer (left and right channel)
118	memset(pAudioSumBuffer[0], 0, Samples * pAudioIO->Channels() * sizeof(float));
119
120
121	// 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	}
130	}
131	}
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
137
138	return 0;
139	}
140
141	/// Will be called by the MIDIIn Thread to let the audio thread trigger a new voice.
142	void AudioThread::SendNoteOn(uint8_t Pitch, uint8_t Velocity) {
143	command_t cmd;
144	cmd.type = command_type_note_on;
145	cmd.pitch = Pitch;
146	cmd.velocity = Velocity;
147	if (this->pCommandQueue->write_space() > 0) this->pCommandQueue->push(&cmd);
148	else dmsg(1,("AudioThread: Command queue full!"));
149	}
150
151	/// 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	command_t cmd;
154	cmd.type = command_type_note_off;
155	cmd.pitch = Pitch;
156	cmd.velocity = Velocity;
157	if (this->pCommandQueue->write_space() > 0) this->pCommandQueue->push(&cmd);
158	else dmsg(1,("AudioThread: Command queue full!"));
159	}
160
161	// 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	command_t cmd;
164	cmd.type = command_type_continuous_controller;
165	cmd.channel = Channel;
166	cmd.number = Number;
167	cmd.value = Value;
168	if (this->pCommandQueue->write_space() > 0) this->pCommandQueue->push(&cmd);
169	else dmsg(1,("AudioThread: Command queue full!"));
170	}
171
172	/**
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	for (int i = 0; i < MAX_AUDIO_VOICES; i++) {
178	if (pVoices[i]->IsActive()) continue; // search for a free voice
179
180	// 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	// add (append) a new voice to the corresponding MIDIKey active voices list
186	Voice** new_voice_ptr = ActiveVoicePool->alloc_append(pMIDIKeyInfo[MIDIKey].pActiveVoices);
187	*new_voice_ptr = pVoices[i];
188	pVoices[i]->pSelfPtr = new_voice_ptr; // FIXME: hack to allow fast deallocation
189
190	// update key info
191	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	return;
197	}
198	std::cerr << "No free voice!" << std::endl << std::flush;
199	}
200
201	/**
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	void AudioThread::ProcessNoteOff(uint8_t MIDIKey, uint8_t Velocity) {
208	pMIDIKeyInfo[MIDIKey].KeyPressed = false; // the MIDI key was currently released
209	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	uint* sustainedmidikey = SustainedKeyPool->alloc();
222	*sustainedmidikey = MIDIKey;
223	pmidikey->pSustainPoolNode = sustainedmidikey;
224	pmidikey->Sustained = true;
225	}
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	}
231	else {
232	// release all active voices on the midi key
233	Voice** pVoicePtr = pmidikey->pActiveVoices->first();
234	while (pVoicePtr) {
235	Voice** pVoicePtrNext = pMIDIKeyInfo[MIDIKey].pActiveVoices->next();
236	(*pVoicePtr)->Release();
237	pVoicePtr = pVoicePtrNext;
238	}
239	}
240	}
241
242	/**
243	* 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	*/
249	void AudioThread::KillVoice(Voice* pVoice) {
250	if (pVoice) {
251	if (pVoice->IsActive()) pVoice->Kill();
252
253	if (pMIDIKeyInfo[pVoice->MIDIKey].Sustained) {
254	// check if the sustain pointer has to be moved, now that we kill the voice
255	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	}
270
271	// remove the voice from the list associated with this MIDI key
272	ActiveVoicePool->free(pVoice->pSelfPtr);
273
274	// 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	}
282	dmsg(3,("Key has no more voices now\n"));
283	}
284	}
285	else std::cerr << "Couldn't release voice! (pVoice == NULL)\n" << std::flush;
286	}
287
288	void AudioThread::ProcessControlChange(uint8_t Channel, uint8_t Number, uint8_t Value) {
289	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	// iterate through all keys that are currently sustained
299	for (uint* key = SustainedKeyPool->first(); key; key = SustainedKeyPool->next()) {
300	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	(*pVoicePtr)->Release();
307	pVoicePtr = pVoicePtrNext;
308	}
309	SustainedKeyPool->free(pMIDIKeyInfo[*key].pSustainPoolNode);
310	pMIDIKeyInfo[*key].pSustainPoolNode = NULL;
311	pMIDIKeyInfo[*key].Sustained = false;
312	pMIDIKeyInfo[*key].hSustainPtr = NULL;
313	}
314	}
315	//SustainedKeyPool->empty();
316	}
317	PrevHoldCCValue = Value;
318	}
319	}
320
321	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	gig::buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension((pAudioIO->MaxSamplesPerCycle() << MAX_PITCH) + 3);
330	dmsg(4,("Cached %d Bytes, %d silence bytes.\n", buf.Size, buf.NullExtensionSize));
331	}
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	}