samplebuffer.h

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#ifndef __LIBDRAGON_SAMPLEBUFFER_H
#define __LIBDRAGON_SAMPLEBUFFER_H
 
#include <stdint.h>
#include <stdbool.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef uint32_t sample_ptr_t;
 
#define SAMPLES_BPS_SHIFT(buf)      ((buf)->ptr_and_flags & 3)
 
#define SAMPLES_PTR(buf)            (void*)((buf)->ptr_and_flags ^ SAMPLES_BPS_SHIFT(buf))
 
#define SAMPLES_PTR_MAKE(ptr, bps)  ((sample_ptr_t)(ptr) | (bps))
 
typedef struct samplebuffer_s {
    sample_ptr_t ptr_and_flags;
 
    int size;
 
    int wpos;
 
    int widx;
 
    int ridx;
 
    int wnext;
 
    WaveformRead wv_read;
 
    void *wv_ctx;
} samplebuffer_t;
 
void samplebuffer_init(samplebuffer_t *buf, uint8_t *uncached_mem, int size);
 
bool samplebuffer_is_inited(samplebuffer_t *buf);
 
void samplebuffer_set_bps(samplebuffer_t *buf, int bps);
 
void samplebuffer_set_waveform(samplebuffer_t *buf, WaveformRead read, void *ctx);
 
void* samplebuffer_get(samplebuffer_t *buf, int wpos, int *wlen);
 
void* samplebuffer_append(samplebuffer_t *buf, int wlen);
 
void samplebuffer_undo(samplebuffer_t *buf, int wlen);
 
void samplebuffer_discard(samplebuffer_t *buf, int wpos);
 
void samplebuffer_flush(samplebuffer_t *buf);
 
void samplebuffer_close(samplebuffer_t *buf);
 
#ifdef __cplusplus
}
#endif
 
#endif /* __LIBDRAGON_SAMPLEBUFFER_H */