www.pudn.com > mp3rar.rar > portio.c

#include "all.h" 
 
int stop_now = 0; 
 
#define IN_BUF_SIZE 1024*128 
 
unsigned long input_file_length = 0; 
 
FILE *input_file; 
 
unsigned char input_area [IN_BUF_SIZE]; 
int input_index; 
int input_len; 
 
void read_input_area () 
{ 
	input_file_length += input_len; 
	input_index = 0; 
 
	input_len = fread(input_area, 1, IN_BUF_SIZE, input_file); 
} 
 
int OpenInputFile (char *fn) 
{ 
	input_file = fopen(fn, "rb"); 
 
	if (input_file == NULL) 
	{ 
		CommonExit(-1, "Error: Cannot open input file"); 
		return -1; 
	} 
 
	read_input_area(); 
 
	return 0; 
} 
 
 
int ReadInputFile() 
{ 
	if (input_index == input_len) 
	{ 
		read_input_area(); 
		 
		if (input_len == 0) 
			return -1; 
	} 
 
	return input_area [input_index ++]; 
} 
 
void CloseInputFile() 
{ 
	fclose(input_file); 
} 
 
unsigned long GetInputLength() 
{ 
	return input_file_length + input_index; 
} 
 
void initio(char *filename) 
{ 
    /* set defaults */ 
    current_program = -1; 
    default_config = 1; 
    mc_info.profile = Main_Profile; 
    mc_info.sampling_rate_idx = Fs_44; 
 
	if (binisopen) 
	{ 
		CloseInputFile(); 
		binisopen = 0; 
	} 
 
	OpenInputFile(filename); 
	binisopen = 1; 
} 
 
int	istrans = 0; 
int framebits; 
 
long getshort() 
{ 
    int c1, c2; 
 
	if (!stop_now) 
	{ 
		if ((c1 = ReadInputFile()) < 0) 
			goto err; 
		if ((c2 = ReadInputFile()) < 0) 
			goto err; 
	} 
 
	framebits += 16; 
    return (c1<<8) | c2; 
 
err: 
	stop_now = 1; 
	return 0; 
} 
 
void restarttio() 
{ 
    cword = 0; 
    nbits = 0; 
} 
 
void startblock() 
{ 
    /* get adif header */ 
 
    if (adif_header_present) 
	{ 
		if (get_adif_header() < 0) 
			adif_header_present = 0; 
		else 
			adif_header_present = 1; 
    } 
     
    byte_align();	/* start of block is byte aligned */ 
}