#ifndef MOSSROSE_CHANNEL_H
#define MOSSROSE_CHANNEL_H

#include <stddef.h>
#include <stdbool.h>
#include <plibsys.h>
#include <mossrose.h>


typedef void (*channel_callback_t)(int channel, void *userdata);


struct channel_shared_t {
	volatile pint active;    /*  boolean */
	volatile pint paused;    /*  boolean */
	volatile pint volume;    /*    0-255 */
	volatile pint pan_left;  /* -255-255 */
	volatile pint pan_right; /* -255-255 */
	volatile pint loops;
	volatile pint trigger_callback;
};


struct channel_t {
	struct channel_shared_t shared;
	bool skip;
	float gain_ll, gain_lr;
	float gain_rl, gain_rr;

	PMutex *sound_mutex;
	struct mossrose_sound_t sound;
	size_t pos;

	channel_callback_t callback;
	void *userdata;
};


void channel_init(struct channel_t *chan);
void channel_reset(struct channel_t *chan);
void channel_pause(struct channel_t *chan);
void channel_resume(struct channel_t *chan);
void channel_set_volume(struct channel_t *chan, float volume);
void channel_set_pan(struct channel_t *chan, float pan_left, float pan_right);
void channel_set_callback(struct channel_t *chan, channel_callback_t callback, void *userdata);
void channel_poll_callbacks(struct channel_t *chan, int index);
int channel_sound_load(struct channel_t *chan, struct mossrose_sound_t *sound, bool force, int loops);
void channel_update_shared(struct channel_t *chan);
void channel_get_next_sample(float *left, float *right, struct channel_t *chan);


#endif