www.pudn.com > ffmpeg_c.rar > fifo.h

#ifndef FIFO_H 
#define FIFO_H 
 
typedef struct AVFifoBuffer { 
    uint8_t *buffer; 
    uint8_t *rptr, *wptr, *end; 
} AVFifoBuffer; 
 
int av_fifo_init(AVFifoBuffer *f, int size); 
void av_fifo_free(AVFifoBuffer *f); 
int av_fifo_size(AVFifoBuffer *f); 
int av_fifo_read(AVFifoBuffer *f, uint8_t *buf, int buf_size); 
int av_fifo_generic_read(AVFifoBuffer *f, int buf_size, void (*func)(void*, void*, int), void* dest); 
void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size); 
void av_fifo_realloc(AVFifoBuffer *f, unsigned int size); 
void av_fifo_drain(AVFifoBuffer *f, int size); 
 
static inline uint8_t av_fifo_peek(AVFifoBuffer *f, int offs) 
{ 
    uint8_t *ptr = f->rptr + offs; 
    if (ptr >= f->end) 
        ptr -= f->end - f->buffer; 
    return *ptr; 
} 
#endif /* FIFO_H */