/*******************************************************************

            MPEG file I/O interface (very very very slow)

 *******************************************************************/

#ifndef MPEG_IO_H
#define MPEG_IO_H

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MPEG_IO_BUFFER_SIZE 512*1024
#define MPEG_IO_BUFFER_SPARE 7
	
typedef struct {
	int  fd;
	char path[FILENAME_MAX];
	size_t file_position;
	size_t file_length;

	unsigned char buffer[MPEG_IO_BUFFER_SPARE+MPEG_IO_BUFFER_SIZE];
	unsigned char *current;
	int buffer_size;

	unsigned int bits;
	int bits_rest;
} MPEG_IO;

#ifdef __cplusplus
extern "C" {
#endif

#ifndef MPEG_IO_C
extern int open_mpeg_file(char *path, MPEG_IO *out);
extern int close_mpeg_file(MPEG_IO *p);
extern int get_bits(MPEG_IO *in, int num_of_bits);
extern int read_bits(MPEG_IO *in, int num_of_bits);
extern int erase_bits(MPEG_IO *in, int num_of_bits);
extern int next_start_code(MPEG_IO *in);
extern size_t mpeg_io_tell(MPEG_IO *p);
extern size_t mpeg_io_seek(MPEG_IO *p, long offset, int origin);
#endif;

#ifdef __cplusplus
}
#endif

#endif