xref: /aosp_15_r20/external/oboe/apps/OboeTester/app/src/main/cpp/synth/VoiceBase.h (revision 05767d913155b055644481607e6fa1e35e2fe72c)
1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef SYNTHMARK_VOICE_BASE_H
18 #define SYNTHMARK_VOICE_BASE_H
19 
20 #include <cstdint>
21 #include "SynthTools.h"
22 #include "UnitGenerator.h"
23 
24 namespace marksynth {
25 /**
26  * Base class for building synthesizers.
27  */
28 class VoiceBase  : public UnitGenerator
29 {
30 public:
VoiceBase()31     VoiceBase()
32     : mPitch(60.0) // MIDI Middle C is 60
33     , mVelocity(1.0) // normalized
34     {
35     }
36 
37     virtual ~VoiceBase() = default;
38 
setPitch(synth_float_t pitch)39     void setPitch(synth_float_t pitch) {
40         mPitch = pitch;
41     }
42 
noteOn(synth_float_t pitch,synth_float_t velocity)43     void noteOn(synth_float_t pitch, synth_float_t velocity) {
44         mVelocity = velocity;
45         mPitch = pitch;
46     }
47 
noteOff()48     void noteOff() {
49     }
50 
51     virtual void generate(int32_t numFrames) = 0;
52 
53 protected:
54     synth_float_t mPitch;
55     synth_float_t mVelocity;
56 };
57 };
58 #endif // SYNTHMARK_VOICE_BASE_H
59