/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#ifndef _JPEG_INTERNAL_H_

#define _JPEG_INTERNAL_H_

#include "jpeg.h"

#include "jpeg_huffman.h"

#include "jpeg_bits.h"

#include "jpeg_debug.h"

#ifndef TRUE

#define TRUE 1

#endif

#ifndef FALSE

#define FALSE 0

#endif

#define JPEG_MAX_COMPONENTS 256

typedef struct _JpegScan JpegScan;

typedef struct _JpegQuantTable JpegQuantTable;

#define JPEG_ENTROPY_SEGMENT 0x0001

#define JPEG_LENGTH 0x0002

struct _JpegQuantTable {

  int pq;

  int16_t quantizer[64];

};

struct _JpegDecoder {

	int width;

	int height;

	int depth;

	int n_components;

	JpegBits bits;

        int error;

        char *error_message;

        int sof_type;

	int width_blocks;

	int height_blocks;

	int restart_interval;

	unsigned char *data;

	unsigned int data_len;

	struct{

		int id;

		int h_sample;

		int v_sample;

		int quant_table;

		int h_subsample;

		int v_subsample;

		unsigned char *image;

		int rowstride;

	} components[JPEG_MAX_COMPONENTS];

        JpegQuantTable quant_tables[4];

	HuffmanTable dc_huff_table[4];

	HuffmanTable ac_huff_table[4];

	int scan_list_length;

	struct{

		int component_index;

		int dc_table;

		int ac_table;

		int quant_table;

		int x;

		int y;

		int offset;

	}scan_list[10];

	int scan_h_subsample;

	int scan_v_subsample;

	/* scan state */

	int x,y;

	int dc[4];

};

struct _JpegScan {

	int length;

	int n_components;

	struct {

		int index;

		int dc_table;

		int ac_table;

	}block_list[10];

};

/* jpeg.c */

int jpeg_decoder_sof_baseline_dct(JpegDecoder *dec, JpegBits *bits);

int jpeg_decoder_define_quant_table(JpegDecoder *dec, JpegBits *bits);

int jpeg_decoder_define_huffman_table(JpegDecoder *dec, JpegBits *bits);

int jpeg_decoder_sos(JpegDecoder *dec, JpegBits *bits);

int jpeg_decoder_soi(JpegDecoder *dec, JpegBits *bits);

int jpeg_decoder_eoi(JpegDecoder *dec, JpegBits *bits);

int jpeg_decoder_application0(JpegDecoder *dec, JpegBits *bits);

int jpeg_decoder_application_misc(JpegDecoder *dec, JpegBits *bits);

int jpeg_decoder_comment(JpegDecoder *dec, JpegBits *bits);

int jpeg_decoder_restart_interval(JpegDecoder *dec, JpegBits *bits);

int jpeg_decoder_restart(JpegDecoder *dec, JpegBits *bits);

void jpeg_decoder_decode_entropy_segment(JpegDecoder *dec);

#endif