78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
// ampler.h
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <SDL2/SDL.h>
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typedef int8_t s8;
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typedef int16_t s16;
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typedef int32_t s32;
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typedef uint8_t u8;
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typedef uint16_t u16;
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typedef uint32_t u32;
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typedef float f32;
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typedef double f64;
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#define if if(
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#define while while(
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#define for for(
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#define do )
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#define or ||
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#define and &&
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#define arraylen(a) (sizeof (a) / sizeof ((a)[0]))
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#define foreach_ptr(TYPE, N, ARRAY) \
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for int N##_i = 0; N##_i == 0; N##_i = 1 do \
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for TYPE *N = &((ARRAY)[N##_i]); N != NULL; N = NULL do \
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for ; N##_i < arraylen(ARRAY); N##_i += 1, N = &((ARRAY)[N##_i]) do
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#define SAMPLE_RATE (44100)
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#define CHANNELS (2)
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#define FRAME_SAMPLES (SAMPLE_RATE / 60)
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typedef struct Sound_src Sound_src;
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struct Sound_src {
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s8 *tracks[CHANNELS];
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s32 track_len; // size of track buffers, in samples
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f32 pos; // position in samples
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f32 speed; // in samples, per sample, can be negative
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s32 start; // play start in samples
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s32 end; // play end in samples
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s8 name[32]; // includes null terminator
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f32 note_speed; // multiplies with base speed, CANNOT be negative
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enum { SND_FREE = 0, SND_STOPPED, SND_PLAYING, SND_LOOPING, } state;
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};
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typedef struct Udp_msg Udp_msg;
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struct Udp_msg {
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s8 text[32]; // includes null terminator
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enum { MSG_FREE = 0, MSG_TRIGGER, } state;
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};
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typedef struct Ampler_state Ampler_state;
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struct Ampler_state {
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u32 size; // in bytes, off this struct
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SDL_AudioDeviceID playdev;
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Sound_src sounds[64];
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s32 played_audio_last_frame;
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Udp_msg messages[64];
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s8 frame_mix[CHANNELS][FRAME_SAMPLES];
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};
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void udp_init(Ampler_state *);
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void udp_frame(Ampler_state *);
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void udp_quit(Ampler_state *);
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