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#pragma once
#include <stdint.h>
#include <stddef.h>
#define BYTES_PER_FRAME 32
#define FRAMES_PER_FIFO 1792
struct frame_fifo {
uint8_t *next_in; /* where to write next input into FIFO */
uint8_t *next_out; /* where to read next output from FIFO */
uint8_t threshold; /* number of frames that should trigger */
void (*threshold_cb)(struct frame_fifo *fifo, unsigned int frames, void *priv);
void *priv;
uint8_t buf[BYTES_PER_FRAME * FRAMES_PER_FIFO];
};
void frame_fifo_init(struct frame_fifo *fifo, unsigned int threshold,
void (*threshold_cb)(struct frame_fifo *fifo, unsigned int frames, void *priv),
void *priv);
/* number of frames currently available in FIFO */
static inline unsigned int frame_fifo_frames(struct frame_fifo *fifo)
{
return ((fifo->next_in + sizeof(fifo->buf) - fifo->next_out) % sizeof(fifo->buf)) / BYTES_PER_FRAME;
}
/* for how many frames do we have space in the FIFO? */
static inline unsigned int frame_fifo_space(struct frame_fifo *fifo)
{
return FRAMES_PER_FIFO - frame_fifo_frames(fifo);
}
/* put a received frame into the FIFO */
int frame_fifo_in(struct frame_fifo *fifo, const uint8_t *frame);
/* put multiple received frames into the FIFO */
int frame_fifo_in_multi(struct frame_fifo *fifo, const uint8_t *frame, size_t count);
/* pull one frame out of the FIFO */
int frame_fifo_out(struct frame_fifo *fifo, uint8_t *out);
/* pull multiple frames out of the FIFO */
int frame_fifo_out_multi(struct frame_fifo *fifo, uint8_t *out, size_t count);
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