djpg_src.c

jpeg快速算法,用于TI和philips的DSP开发

/*
 *********************************************************************
 * File name: djpg.c
 * Version: 5.0(release v1.0)    Date: Jan 12, 2006
 * Author:  xiezm                Email: [e-mail]
 * Company: Wuxi Intech co., ltd.
 *
 * Project: Jpeg Decoder for Trio
 *********************************************************************
 */

#define DJPG_GLOBALS

#include "cf6_chess.h"

#ifdef WIN32
#include <stdio.h>
#include <stdlib.h>
#endif

#include "djpg.h"


void system_initial(void)
{
	bitstream_init();
	parse_initial();
}

#ifdef WIN32
int main(int argc, char **argv)
{
	int i;

	if ((INPUT = fopen(argv[1], "rb")) == NULL)
	{
		fprintf(stderr, "Error: Can't open file specified %s \n",argv[1]);
		exit(0);
	}
	if ((BMP = fopen(argv[2], "wb")) == NULL)
	{
		fprintf(stderr, "Error: Can't open file specified %s \n",argv[2]);
		exit(0);
	}
	if ((OUTPUT = fopen(argv[3], "wt")) == NULL)
	{
		fprintf(stderr, "Error: Can't open file specified %s \n",argv[3]);
		exit(0);
	}
#else
int main()
{
	int i;
#endif

	system_initial();
	parse_header();
	decode_initial();

#ifdef WIN32
	output_header();
#endif

	if((2==Vi[0])&&(2==Hi[0]))
	{
		for(i=1;i<=num_mcu;i++)
		{
			decode_mcu_2x2();

#ifdef WIN32
			output_mcu();
#endif

			if(dri_rst_interval)
			{
				if((!(i%dri_rst_interval)) && (i<num_mcu))
				{
					restart_decode();
				}
			}
		}
	}
	else if((1==Vi[0])&&(2==Hi[0]))
	{
		for(i=1;i<=num_mcu;i++)
		{
			decode_mcu_2x1();

#ifdef WIN32
			output_mcu();
#endif

			if(dri_rst_interval)
			{
				if((!(i%dri_rst_interval)) && (i<num_mcu))
				{
					restart_decode();
				}
			}
		}
	}
	else if((2==Vi[0])&&(1==Hi[0]))
	{
		for(i=1;i<=num_mcu;i++)
		{
			decode_mcu_1x2();

#ifdef WIN32
			output_mcu();
#endif

			if(dri_rst_interval)
			{
				if((!(i%dri_rst_interval)) && (i<num_mcu))
				{
					restart_decode();
				}
			}
		}
	}
	else if((1==Vi[0])&&(1==Hi[0]))
	{
		for(i=1;i<=num_mcu;i++)
		{
			decode_mcu_1x1();

#ifdef WIN32
			output_mcu();
#endif

			if(dri_rst_interval)
			{
				if((!(i%dri_rst_interval)) && (i<num_mcu))
				{
					restart_decode();
				}
			}
		}
	}
	else
	{
		error(99);
	}
	
#ifdef WIN32
	write_to_bmp();
#endif
	

    //check EOI
	drop_bits(bits_left%8);
	if((0x00ff == get_bits(8)) && (0x00d9 == get_bits(8)))
	{
#ifdef WIN32
		fprintf(stderr, "bingo!");
		fclose(INPUT);
		fclose(OUTPUT);
		fclose(BMP);
#endif
		return 1;
	}
	else
	{
		error(98);
	}
	return 0;
}

void error(int eflag)
{
#ifdef WIN32
	fprintf(stderr, "error: %d", eflag);
	fclose(INPUT);
	fclose(OUTPUT);
	fclose(BMP);
	exit(0);
#else
	error_flag = eflag;
	while(1);
#endif
}
/********************End of file*************************************/