/* State of marker reader --- nominally internal, but applications   * supplying COM or APPn handlers might like to know the state.   */  boolean saw_SOI;		/* found SOI? */  boolean saw_SOF;		/* found SOF? */  int next_restart_num;		/* next restart number expected (0-7) */  unsigned int discarded_bytes;	/* # of bytes skipped looking for a marker */};/* Entropy decoding */struct jpeg_entropy_decoder {  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));  JMETHOD(boolean, decode_mcu, (j_decompress_ptr cinfo,				JBLOCKROW *MCU_data));  /* This is here to share code between baseline and progressive decoders; */  /* other modules probably should not use it */  boolean insufficient_data;	/* set TRUE after emitting warning */};/* Inverse DCT (also performs dequantization) */typedef JMETHOD(void, inverse_DCT_method_ptr,		(j_decompress_ptr cinfo, jpeg_component_info * compptr,		 JCOEFPTR coef_block,		 JSAMPARRAY output_buf, JDIMENSION output_col));struct jpeg_inverse_dct {  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));  /* It is useful to allow each component to have a separate IDCT method. */  inverse_DCT_method_ptr inverse_DCT[MAX_COMPONENTS];};/* Upsampling (note that upsampler must also call color converter) */struct jpeg_upsampler {  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));  JMETHOD(void, upsample, (j_decompress_ptr cinfo,			   JSAMPIMAGE input_buf,			   JDIMENSION *in_row_group_ctr,			   JDIMENSION in_row_groups_avail,			   JSAMPARRAY output_buf,			   JDIMENSION *out_row_ctr,			   JDIMENSION out_rows_avail));  boolean need_context_rows;	/* TRUE if need rows above & below */};/* Colorspace conversion */struct jpeg_color_deconverter {  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));  JMETHOD(void, color_convert, (j_decompress_ptr cinfo,				JSAMPIMAGE input_buf, JDIMENSION input_row,				JSAMPARRAY output_buf, int num_rows));};/* Color quantization or color precision reduction */struct jpeg_color_quantizer {  JMETHOD(void, start_pass, (j_decompress_ptr cinfo, boolean is_pre_scan));  JMETHOD(void, color_quantize, (j_decompress_ptr cinfo,				 JSAMPARRAY input_buf, JSAMPARRAY output_buf,				 int num_rows));  JMETHOD(void, finish_pass, (j_decompress_ptr cinfo));  JMETHOD(void, new_color_map, (j_decompress_ptr cinfo));};/* 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_prep_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_color_converter JPP((j_compress_ptr cinfo));EXTERN(void) jinit_downsampler JPP((j_compress_ptr cinfo));EXTERN(void) jinit_forward_dct JPP((j_compress_ptr cinfo));EXTERN(void) jinit_huff_encoder JPP((j_compress_ptr cinfo));EXTERN(void) jinit_phuff_encoder JPP((j_compress_ptr cinfo));EXTERN(void) jinit_marker_writer JPP((j_compress_ptr cinfo));/* Decompression module initialization routines */EXTERN(void) jinit_master_decompress JPP((j_decompress_ptr cinfo));EXTERN(void) jinit_d_main_controller JPP((j_decompress_ptr cinfo,					  boolean need_full_buffer));EXTERN(void) jinit_d_coef_controller JPP((j_decompress_ptr cinfo,					  boolean need_full_buffer));EXTERN(void) jinit_d_post_controller JPP((j_decompress_ptr cinfo,					  boolean need_full_buffer));EXTERN(void) jinit_input_controller JPP((j_decompress_ptr cinfo));EXTERN(void) jinit_marker_reader JPP((j_decompress_ptr cinfo));EXTERN(void) jinit_huff_decoder JPP((j_decompress_ptr cinfo));EXTERN(void) jinit_phuff_decoder JPP((j_decompress_ptr cinfo));EXTERN(void) jinit_inverse_dct JPP((j_decompress_ptr cinfo));EXTERN(void) jinit_upsampler JPP((j_decompress_ptr cinfo));EXTERN(void) jinit_color_deconverter JPP((j_decompress_ptr cinfo));EXTERN(void) jinit_1pass_quantizer JPP((j_decompress_ptr cinfo));EXTERN(void) jinit_2pass_quantizer JPP((j_decompress_ptr cinfo));EXTERN(void) jinit_merged_upsampler JPP((j_decompress_ptr cinfo));/* Memory manager initialization */EXTERN(void) jinit_memory_mgr JPP((j_common_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(void) jcopy_sample_rows JPP((JSAMPARRAY input_array, int source_row,				    JSAMPARRAY output_array, int dest_row,				    int num_rows, JDIMENSION num_cols));EXTERN(void) jcopy_block_row JPP((JBLOCKROW input_row, JBLOCKROW output_row,				  JDIMENSION num_blocks));EXTERN(void) jzero_far JPP((void FAR * target, size_t bytestozero));/* Constant tables in jutils.c */#if 0				/* This table is not actually needed in v6a */extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */#endifextern 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 */