/* * jpegint.h * * Copyright (C) 1991-1997, Thomas G. Lane. * This file is part of the Independent JPEG Group's software. * For conditions of distribution and use, see the accompanying README file. * * This file provides common declarations for the various JPEG modules. * These declarations are considered internal to the JPEG library; most * applications using the library shouldn't need to include this file. *//* Declarations for both compression & decompression */typedef enum {			/* Operating modes for buffer controllers */	JBUF_PASS_THRU,		/* Plain stripwise operation */	/* Remaining modes require a full-image buffer to have been created */	JBUF_SAVE_SOURCE,	/* Run source subobject only, save output */	JBUF_CRANK_DEST,	/* Run dest subobject only, using saved data */	JBUF_SAVE_AND_PASS	/* Run both subobjects, save output */} J_BUF_MODE;/* Values of global_state field (jdapi.c has some dependencies on ordering!) */#define CSTATE_START	100	/* after create_compress */#define CSTATE_SCANNING	101	/* start_compress done, write_scanlines OK */#define CSTATE_RAW_OK	102	/* start_compress done, write_raw_data OK */#define CSTATE_WRCOEFS	103	/* jpeg_write_coefficients done */#define DSTATE_START	200	/* after create_decompress */#define DSTATE_INHEADER	201	/* reading header markers, no SOS yet */#define DSTATE_READY	202	/* found SOS, ready for start_decompress */#define DSTATE_PRELOAD	203	/* reading multiscan file in start_decompress*/#define DSTATE_PRESCAN	204	/* performing dummy pass for 2-pass quant */#define DSTATE_SCANNING	205	/* start_decompress done, read_scanlines OK */#define DSTATE_RAW_OK	206	/* start_decompress done, read_raw_data OK */#define DSTATE_BUFIMAGE	207	/* expecting jpeg_start_output */#define DSTATE_BUFPOST	208	/* looking for SOS/EOI in jpeg_finish_output */#define DSTATE_RDCOEFS	209	/* reading file in jpeg_read_coefficients */#define DSTATE_STOPPING	210	/* looking for EOI in jpeg_finish_decompress *//* Declarations for compression modules *//* Master control module */struct jpeg_comp_master {  JMETHOD(void, prepare_for_pass, (j_compress_ptr cinfo));  JMETHOD(void, pass_startup, (j_compress_ptr cinfo));  JMETHOD(void, finish_pass, (j_compress_ptr cinfo));  /* State variables made visible to other modules */  boolean call_pass_startup;	/* True if pass_startup must be called */  boolean is_last_pass;		/* True during last pass */};/* Main buffer control (downsampled-data buffer) */struct jpeg_c_main_controller {  JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));//  JMETHOD(void, process_data, (j_compress_ptr cinfo,//			       JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,//			       JDIMENSION in_rows_avail ));};/* Compression preprocessing (downsampling input buffer control) */struct jpeg_c_prep_controller {  JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));/*  JMETHOD(void, pre_process_data, (j_compress_ptr cinfo,				   JSAMPARRAY input_buf,				   JDIMENSION *in_row_ctr,				   JDIMENSION in_rows_avail,				   JSAMPIMAGE output_buf,				   JDIMENSION *out_row_group_ctr,				   JDIMENSION out_row_groups_avail));*/};/* Coefficient buffer control */struct jpeg_c_coef_controller {  JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));//  JMETHOD(boolean, compress_data, (j_compress_ptr cinfo,//				   JSAMPIMAGE input_buf));};/* Entropy encoding */struct jpeg_entropy_encoder {  JMETHOD(void, start_pass, (j_compress_ptr cinfo, boolean gather_statistics));  //JMETHOD(boolean, encode_mcu, (j_compress_ptr cinfo, JBLOCKROW *MCU_data));  JMETHOD(void, finish_pass, (j_compress_ptr cinfo));};/* Marker writing */struct jpeg_marker_writer {  JMETHOD(void, write_marker_byte, (j_compress_ptr cinfo, int val));};/* Miscellaneous useful macros */#undef MAX#define MAX(a,b)	((a) > (b) ? (a) : (b))#undef MIN#define MIN(a,b)	((a) < (b) ? (a) : (b))/* We assume that right shift corresponds to signed division by 2 with * rounding towards minus infinity.  This is correct for typical "arithmetic * shift" instructions that shift in copies of the sign bit.  But some * C compilers implement >> with an unsigned shift.  For these machines you * must define RIGHT_SHIFT_IS_UNSIGNED. * RIGHT_SHIFT provides a proper signed right shift of an INT32 quantity. * It is only applied with constant shift counts.  SHIFT_TEMPS must be * included in the variables of any routine using RIGHT_SHIFT. */#ifdef RIGHT_SHIFT_IS_UNSIGNED#define SHIFT_TEMPS	INT32 shift_temp;#define RIGHT_SHIFT(x,shft)  \	((shift_temp = (x)) < 0 ? \	 (shift_temp >> (shft)) | ((~((INT32) 0)) << (32-(shft))) : \	 (shift_temp >> (shft)))#else#define SHIFT_TEMPS#define RIGHT_SHIFT(x,shft)	((x) >> (shft))#endif/* Short forms of external names for systems with brain-damaged linkers. */#ifdef NEED_SHORT_EXTERNAL_NAMES#define jinit_compress_master	jICompress#define jinit_c_master_control	jICMaster#define jinit_c_main_controller	jICMainC#define jinit_c_prep_controller	jICPrepC#define jinit_c_coef_controller	jICCoefC#define jinit_color_converter	jICColor#define jinit_downsampler	jIDownsampler//#define jinit_forward_dct	jIFDCT#define jinit_huff_encoder	jIHEncoder//#define jinit_phuff_encoder	jIPHEncoder#define jinit_marker_writer	jIMWriter#define jinit_master_decompress	jIDMaster#define jinit_d_main_controller	jIDMainC#define jinit_d_coef_controller	jIDCoefC#define jinit_d_post_controller	jIDPostC#define jinit_input_controller	jIInCtlr#define jinit_marker_reader	jIMReader#define jinit_huff_decoder	jIHDecoder#define jinit_phuff_decoder	jIPHDecoder#define jinit_inverse_dct	jIIDCT#define jinit_upsampler		jIUpsampler#define jinit_color_deconverter	jIDColor#define jinit_1pass_quantizer	jI1Quant#define jinit_2pass_quantizer	jI2Quant#define jinit_merged_upsampler	jIMUpsampler#define jinit_memory_mgr	jIMemMgr#define jdiv_round_up		jDivRound#define jround_up		jRound#define jcopy_sample_rows	jCopySamples#define jcopy_block_row		jCopyBlocks#define jzero_far		jZeroFar#define jpeg_zigzag_order	jZIGTable#define jpeg_natural_order	jZAGTable#endif /* NEED_SHORT_EXTERNAL_NAMES *//* Compression module initialization routines */EXTERN(void) jinit_compress_master JPP((j_compress_ptr cinfo));EXTERN(void) jinit_c_master_control JPP((j_compress_ptr cinfo,					 boolean transcode_only));EXTERN(void) jinit_c_main_controller JPP((j_compress_ptr cinfo,					  boolean need_full_buffer));EXTERN(void) jinit_c_coef_controller JPP((j_compress_ptr cinfo,					  boolean need_full_buffer));EXTERN(void) jinit_huff_encoder JPP((j_compress_ptr cinfo));EXTERN(void) jinit_marker_writer JPP((j_compress_ptr cinfo));/* Utility routines in jutils.c */EXTERN(long) jdiv_round_up JPP((long a, long b));EXTERN(long) jround_up JPP((long a, long b));extern const int jpeg_natural_order[]; /* zigzag coef order to natural order *//* Suppress undefined-structure complaints if necessary. */#ifdef INCOMPLETE_TYPES_BROKEN#ifndef AM_MEMORY_MANAGER	/* only jmemmgr.c defines these */struct jvirt_sarray_control { long dummy; };struct jvirt_barray_control { long dummy; };#endif#endif /* INCOMPLETE_TYPES_BROKEN */