mixer.h

Go to the documentation of this file.

 
#ifndef __LIBDRAGON_MIXER_H
#define __LIBDRAGON_MIXER_H
 
#include <stdint.h>
#include <stdbool.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define MIXER_MAX_CHANNELS      32
 
#define MIXER_LOOP_OVERREAD     64
 
typedef struct waveform_s waveform_t;
typedef struct samplebuffer_s samplebuffer_t;
 
void mixer_init(int num_channels);
 
void mixer_close(void);
 
void mixer_set_vol(float vol);
 
void mixer_ch_set_vol(int ch, float lvol, float rvol);
 
void mixer_ch_set_vol_pan(int ch, float vol, float pan);
 
void mixer_ch_set_vol_dolby(int ch, float fl, float fr,
    float c, float sl, float sr);
 
void mixer_ch_play(int ch, waveform_t *wave);
 
void mixer_ch_set_freq(int ch, float frequency);
 
void mixer_ch_set_pos(int ch, float pos);
 
float mixer_ch_get_pos(int ch);
 
void mixer_ch_stop(int ch);
 
bool mixer_ch_playing(int ch);
 
void mixer_ch_set_limits(int ch, int max_bits, float max_frequency, int max_buf_sz);
 
void mixer_poll(int16_t *out, int nsamples);
 
typedef int (*MixerEvent)(void* ctx);
 
void mixer_add_event(int64_t delay, MixerEvent cb, void *ctx);
 
void mixer_remove_event(MixerEvent cb, void *ctx);
 
 
/*********************************************************************
 *
 * WAVEFORMS
 *
 *********************************************************************/
 
typedef void (*WaveformRead)(void *ctx, samplebuffer_t *sbuf, int wpos, int wlen, bool seeking);
 
typedef struct waveform_s {
    const char *name;
 
    uint8_t bits;
 
    uint8_t channels;
 
    float frequency;
 
    int len;
 
    int loop_len;
 
    WaveformRead read;
 
    void *ctx;
} waveform_t;
 
#define WAVEFORM_MAX_LEN         0x1FFFFFFF
 
#define WAVEFORM_UNKNOWN_LEN     WAVEFORM_MAX_LEN
 
#ifdef __cplusplus
}
#endif
 
#endif /* __LIBDRAGON_MIXER_H */