/*	JPEGD header file
	½1992-93 Brainstorm & Atari Corporation.
	to be included after vdi.h
	Last modification on 8-apr-1993.
*/

typedef struct _JPGD_STRUCT {
	void	*InPointer;								/* JPEG Image Pointer */
	void	*OutPointer;							/* Output Buffer/Filename Pointer (see OutFlag) */
	long	InSize;									/* JPEG Image Size (Bytes) */
	long	OutSize;								/* Output Image Size (Bytes) */
	short	InComponents;							/* JPEG Image Components Number (1->4) */
	short	OutComponents;							/* Output Components Number (1->4) */
	short	OutPixelSize;							/* Output Pixel Size (1->4) */
	short	OutFlag;								/* 0 (RAM Output) / -1 (Disk Output) */
	short	XLoopCounter;							/* Number of MCUs per Row */
	short	YLoopCounter;							/* Number of MCUs per Column */
	short	(*Create)(struct _JPGD_STRUCT *);		/* Pointer to User Routine / NULL */
	short	(*Write)(struct _JPGD_STRUCT *);		/* Pointer to User Routine / NULL */
	short	(*Close)(struct _JPGD_STRUCT *);		/* Pointer to User Routine / NULL */
	short	(*SigTerm)(struct _JPGD_STRUCT *);		/* Pointer to User Routine / NULL */
	uint8	*Comp1GammaPtr;							/* Component 1 Gamma Table / NULL */
	uint8	*Comp2GammaPtr;							/* Component 2 Gamma Table / NULL */
	uint8	*Comp3GammaPtr;							/* Component 3 Gamma Table / NULL */
	uint8	*Comp4GammaPtr;							/* Component 4 Gamma Table / NULL */
	short	(*UserRoutine)(struct _JPGD_STRUCT *);	/* Pointer to User Routine (Called during Decompression) / NULL */
	void	*OutTmpPointer;							/* Current OutPointer / Temporary Disk Buffer Pointer (see OutFlag) */
	short	MCUsCounter;							/* Number of MCUs not Decoded */
	short	OutTmpHeight;							/* Number of Lines in OutTmpPointer */
	long	User[2];								/* Free, Available for User */
	short	OutHandle;								/* 0 / Output File Handle (see OutFlag) */
	MFDB	MFDBStruct;								/* Output Image MFDB */
} JPGD_STRUCT;
typedef JPGD_STRUCT	*JPGD_PTR;

#define	JPGD_MAGIC	'_JPD'
#define	JPGD_VERSION	1

enum JPGD_ENUM {
	NOERROR=0,			/* File correctly uncompressed */
	UNKNOWNFORMAT,		/* File is not JFIF (Error) */
	INVALIDMARKER,		/* Reserved CCITT Marker Found (Error) */
	SOF1MARKER,			/* Mode not handled by the decoder (Error) */
	SOF2MARKER,			/* Mode not handled by the decoder (Error) */
	SOF3MARKER,			/* Mode not handled by the decoder (Error) */
	SOF5MARKER,			/* Mode not handled by the decoder (Error) */
	SOF6MARKER,			/* Mode not handled by the decoder (Error) */
	SOF7MARKER,			/* Mode not handled by the decoder (Error) */
	SOF9MARKER,			/* Mode not handled by the decoder (Error) */
	SOF10MARKER,		/* Mode not handled by the decoder (Error) */
	SOF11MARKER,		/* Mode not handled by the decoder (Error) */
	SOF13MARKER,		/* Mode not handled by the decoder (Error) */
	SOF14MARKER,		/* Mode not handled by the decoder (Error) */
	SOF15MARKER,		/* Mode not handled by the decoder (Error) */
	RSTmMARKER,			/* Unexpected RSTm found (Error) */
	BADDHTMARKER,		/* Buggy DHT Marker (Error) */
	DACMARKER,			/* Marker not handled by the decoder (Error) */
	BADDQTMARKER,		/* Buggy DQT Marker (Error) */
	BADDNLMARKER,		/* Invalid/Unexpected DNL Marker (Error) */
	BADDRIMARKER,		/* Invalid DRI Header Size (Error) */
	DHPMARKER,			/* Marker not handled by the decoder (Error) */
	EXPMARKER,			/* Marker not handled by the decoder (Error) */
	BADSUBSAMPLING,		/* Invalid components subsampling (Error) */
	NOTENOUGHMEMORY,	/* Not enough memory... (Error) */
	DECODERBUSY,		/* Decoder is busy (Error) */
	DSPBUSY,			/* Can't lock the DSP (Error) */
	BADSOFnMARKER,		/* Buggy SOFn marker (Error) */
	BADSOSMARKER,		/* Buggy SOS marker (Error) */
	HUFFMANERROR,		/* Buggy Huffman Stream (Error) */
	BADPIXELFORMAT,		/* Invalid Output Pixel Format (Error) */
	DISKFULL,			/* Hard/Floppy Disk Full (Error) */
	MISSINGMARKER,		/* Marker expected but not found (Error) */
	IMAGETRUNCATED,		/* More bytes Needed (Error) */
	EXTRABYTES,			/* Dummy Bytes after EOI Marker (Warning) */
	USERABORT,			/* User Routine signaled 'Abort' */
	DSPMEMORYERROR,		/* Not Enough DSP RAM (Error) */
	NORSTmMARKER,		/* RSTm Marker expected but not found */
	BADRSTmMARKER,		/* Invalid RSTm Marker Number */
	DRIVERCLOSED,		/* Driver is Already Closed. */
	ENDOFIMAGE			/* Stop Decoding (Internal Message, Should Never Appear) */
};
typedef	long	JPGD_ENUM;

typedef struct {
	long		JPGDVersion;
	JPGD_ENUM	(*JPGDOpenDriver)(JPGD_PTR);
	JPGD_ENUM	(*JPGDCloseDriver)(JPGD_PTR);
	long        (*JPGDGetStructSize)(void);
	JPGD_ENUM	(*JPGDGetImageInfo)(JPGD_PTR);
	JPGD_ENUM	(*JPGDGetImageSize)(JPGD_PTR);
	JPGD_ENUM	(*JPGDDecodeImage)(JPGD_PTR);
} JPGDDRV_STRUCT;
typedef JPGDDRV_STRUCT	*JPGDDRV_PTR;