audio.h (1080B)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 |
#ifndef _AUDIO_H_
#define _AUDIO_H_
#include <glm/glm.hpp>
#include "intrinsics.h"
#include "assets.h"
#include "memory_arena.h"
union Volume {
struct {
u16 left;
u16 right;
};
u32 combined;
};
// TODO: cache friendly layout
struct SoundState {
SoundData data;
// TODO: make this signed so we can delay sounds?
u32 num_played_samples;
volatile bool stopped;
bool loop;
Volume volume;
bool positional;
glm::vec3 position;
u32 generation;
SoundState * volatile next;
SoundState * volatile next_free;
volatile bool freelisted;
};
struct Sound {
SoundState * state;
u32 generation;
};
struct AudioOutputBuffer {
// num_channels?
u32 sample_rate;
u32 num_samples;
s16 * samples;
};
struct PlaySoundOptions {
bool loop;
};
void audio_init( MemoryArena * arena );
Sound audio_play_sound( MemoryArena * arena, SoundData data, bool loop = false );
void audio_stop_sound( Sound sound );
void audio_set_volume( Sound sound, float left, float right = -1.0f );
void audio_mix( MemoryArena * arena, AudioOutputBuffer * buffer );
#endif // _AUDIO_H_
|