townengine/include/twn_audio.h

#ifndef TWN_AUDIO_H
#define TWN_AUDIO_H

#include "twn_engine_api.h"
#include "twn_option.h"

#include <stdbool.h>

/* plays audio file at specified channel or at scratch channel if NULL is passed, without ability to refer to it later */
/* path path must contain valid file extension to infer which file format it is */
/* supported formats: .ogg, .xm */
TWN_API void audio_play(const char *path,
                        const char *channel,    /* optional */
                        bool  repeat,           /* default: false */
                        float volume,           /* default: 1.0f, range: 0.0f to 1.0f */
                        float panning);         /* default: 0.0f, range: -1.0 to 1.0f */

typedef enum {
    AUDIO_PARAM_REPEAT,
    AUDIO_PARAM_VOLUME,
    AUDIO_PARAM_PANNING,
} AudioParam;

TWN_API void audio_set(const char *channel, AudioParam param, float value);

/* TODO */
// TWN_API bool audio_ended(const char *channel);

#ifndef TWN_NOT_C

typedef struct PlayAudioArgs {
    char *path;

    m_option_list(
        char *, channel,
        bool,   repeat,
        float,  volume,
        float,  panning )
} PlayAudioArgs;

TWN_API void audio_play_args(PlayAudioArgs args);
#define m_audio(...) (audio_play_args((PlayAudioArgs){__VA_ARGS__}))

#endif

#endif