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#ifndef SOUNDS_H_
#define SOUNDS_H_
#include <alsa/asoundlib.h>
#include <limits.h>
#include <math.h>
#include <pthread.h>
#include <stdbool.h>
#include "messages.h"
#include "midi_freqs.h"
#include "defines.h"
#define check(ret) \
do { \
int res = (ret); \
if (res < 0) { \
fprintf(stderr, "%s:%d ERROR: %s (%d)\n", __FILE__, __LINE__, \
snd_strerror(res), res); \
exit(1); \
} \
} while (0)
typedef struct {
snd_pcm_t *pcm;
message_queue *queue;
WaveData *wave_data;
} sound_thread_meta;
typedef enum {
ENV_OFF,
ENV_ATTACK,
ENV_DECAY,
ENV_SUSTAIN,
ENV_RELEASE,
} envelope_state;
typedef struct {
int attack_time;
int decay_time;
float sustain_level;
int release_time;
} envelope_params;
typedef struct {
envelope_state state;
int counter;
float current_inc;
float release_value;
envelope_params params;
} envelope;
typedef struct {
bool active;
float freq;
float phase;
float phase_inc;
envelope envelope;
} synth_voice;
typedef struct {
synth_voice *buffer;
size_t size;
} synth_voices;
typedef struct {
oscilator_type oscilator_type;
float master_volume;
envelope_params envelope_params;
float last_freq;
} synth_params;
typedef float (*oscilator_func)(float phase);
void *sound_thread_start(void *ptr);
int set_hw_params(snd_pcm_t *pcm);
#endif // SOUNDS_H_
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