/[svn]/linuxsampler/tags/start/audiothread.h
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Contents of /linuxsampler/tags/start/audiothread.h

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Sat Oct 25 20:24:32 2003 UTC (20 years, 5 months ago) by (unknown author)
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This commit was manufactured by cvs2svn to create tag 'start'.
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 <stdio.h>
27 #include <stdlib.h>
28 #include <math.h>
29 #include <unistd.h>
30 #include <fcntl.h>
31
32 #include "global.h"
33 #include "thread.h"
34 #include "ringbuffer.h"
35 #include "voice.h"
36 #include "audioio.h"
37 #include "gig.h"
38
39 #define DEBUG 0
40 #define PITCHBEND_SEMITONES 12
41 #define MAX_AUDIO_VOICES 64
42
43 // preload 64k samples = 128kB of data in RAM for 16 bit mono samples
44 #define NUM_RAM_PRELOAD_SAMPLES 65536
45
46 class AudioThread : public Thread {
47 public:
48 AudioThread(AudioIO* pAudioIO, DiskThread* pDiskThread, gig::Instrument* pInstrument);
49 ~AudioThread();
50 void ProcessNoteOn(uint8_t Pitch, uint8_t Velocity);
51 void ProcessNoteOff(uint8_t Pitch, uint8_t Velocity);
52 protected:
53 int Main(); ///< Implementation of virtual method from class Thread
54 private:
55 enum command_type_t {
56 command_type_note_on,
57 command_type_note_off
58 };
59 struct command_t {
60 command_type_t type;
61 uint8_t pitch;
62 uint8_t velocity;
63 } command;
64 RingBuffer<command_t>* pCommandQueue;
65 float* pAudioSumBuffer; ///< Audio sum of all voices (32 bit)
66 Voice** pVoices; ///< The voice pool, containing all Voices (active and inactice voices) in unsorted order
67 Voice* ActiveVoices[128]; ///< Contains all active voices sorted by MIDI key number
68 AudioIO* pAudioIO;
69 DiskThread* pDiskThread;
70 gig::Instrument* pInstrument;
71
72 void ActivateVoice(uint8_t MIDIKey, uint8_t Velocity);
73 void ReleaseVoice(uint8_t MIDIKey, uint8_t Velocity);
74 void CacheInitialSamples(gig::Sample* pSample);
75 };
76
77 #endif // __AUDIOTHREAD_H__

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