engine.audio.sound source code

1 /*
2     Copyright © 2020, Luna Nielsen
3     Distributed under the 2-Clause BSD License, see LICENSE file.
4     
5     Authors: Luna Nielsen
6 */
7 module engine.audio.sound;
8 import engine.audio.astream;
9 import bindbc.openal;
10 import engine.math;
11 
12 /**
13     A sound
14 */
15 class Sound {
16 private:
17     ALuint bufferId;
18     ALuint sourceId;
19 
20 public:
21     ~this() {
22         alDeleteSources(1, &sourceId);
23         alDeleteBuffers(1, &bufferId);
24     }
25 
26     /**
27         Construct a sound from a file path
28     */
29     this(string file) {
30         this(open(file));
31     }
32 
33     /**
34         Construct a sound
35     */
36     this(AudioStream stream) {
37 
38         // Generate buffer
39         alGenBuffers(1, &bufferId);
40         ubyte[] data = stream.readAll();
41         alBufferData(bufferId, stream.format, data.ptr, cast(int)data.length, cast(int)stream.bitrate/stream.channels);
42 
43         // Generate source
44         alGenSources(1, &sourceId);
45         alSourcei(sourceId, AL_BUFFER, bufferId);
46         alSourcef(sourceId, AL_PITCH, 1);
47         alSourcef(sourceId, AL_GAIN, 0.5);
48     }
49 
50     /**
51         Play sound
52     */
53     void play(float gain = 0.5, float pitch = 1, vec3 position = vec3(0)) {
54         alSource3f(sourceId, AL_POSITION, position.x, position.y, position.z);
55         alSourcef(sourceId, AL_PITCH, pitch);
56         alSourcef(sourceId, AL_GAIN, gain);
57         alSourcePlay(sourceId);
58     }
59 
60     void setPitch(float pitch) {
61         alSourcef(sourceId, AL_PITCH, pitch);
62     }
63 
64     void setGain(float gain) {
65         alSourcef(sourceId, AL_GAIN, gain);
66     }
67 
68     /**
69         Stop sound
70     */
71     void stop() {
72         alSourceStop(sourceId);
73     }
74 }