/* 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));};/* Colorspace conversion */struct jpeg_color_converter {  JMETHOD(void, start_pass, (j_compress_ptr cinfo));  JMETHOD(void, color_convert, (j_compress_ptr cinfo,				JSAMPARRAY input_buf, JSAMPIMAGE output_buf,				JDIMENSION output_row, int num_rows));};/* Downsampling */struct jpeg_downsampler {  JMETHOD(void, start_pass, (j_compress_ptr cinfo));  JMETHOD(void, downsample, (j_compress_ptr cinfo,			     JSAMPIMAGE input_buf, JDIMENSION in_row_index,			     JSAMPIMAGE output_buf,			     JDIMENSION out_row_group_index));  boolean need_context_rows;	/* TRUE if need rows above & below */};/* Forward DCT (also controls coefficient quantization) */struct jpeg_forward_dct {  JMETHOD(void, start_pass, (j_compress_ptr cinfo));  /* perhaps this should be an array??? */  JMETHOD(void, forward_DCT, (j_compress_ptr cinfo,			      jpeg_component_info * compptr,			      JSAMPARRAY sample_data, JBLOCKROW coef_blocks,			      JDIMENSION start_row, JDIMENSION start_col,			      JDIMENSION num_blocks));};/* 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 {  /* write_any_marker is exported for use by applications */  /* Probably only COM and APPn markers should be written */  JMETHOD(void, write_any_marker, (j_compress_ptr cinfo, int marker,				   const JOCTET *dataptr, unsigned int datalen));  JMETHOD(void, write_file_header, (j_compress_ptr cinfo));  JMETHOD(void, write_frame_header, (j_compress_ptr cinfo));  JMETHOD(void, write_scan_header, (j_compress_ptr cinfo));  JMETHOD(void, write_file_trailer, (j_compress_ptr cinfo));  JMETHOD(void, write_tables_only, (j_compress_ptr cinfo));};/* Declarations for decompression modules *//* Master control module */struct jpeg_decomp_master {  JMETHOD(void, prepare_for_output_pass, (j_decompress_ptr cinfo));  JMETHOD(void, finish_output_pass, (j_decompress_ptr cinfo));  /* State variables made visible to other modules */  boolean is_dummy_pass;	/* True during 1st pass for 2-pass quant */};/* Input control module */struct jpeg_input_controller {  JMETHOD(int, consume_input, (j_decompress_ptr cinfo));  JMETHOD(void, reset_input_controller, (j_decompress_ptr cinfo));  JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));  JMETHOD(void, finish_input_pass, (j_decompress_ptr cinfo));  /* State variables made visible to other modules */  boolean has_multiple_scans;	/* True if file has multiple scans */  boolean eoi_reached;		/* True when EOI has been consumed */};/* Main buffer control (downsampled-data buffer) */struct jpeg_d_main_controller {  JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));  JMETHOD(void, process_data, (j_decompress_ptr cinfo,			       JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,			       JDIMENSION out_rows_avail));};/* Coefficient buffer control */struct jpeg_d_coef_controller {  JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));  JMETHOD(int, consume_data, (j_decompress_ptr cinfo));  JMETHOD(void, start_output_pass, (j_decompress_ptr cinfo));  JMETHOD(int, decompress_data, (j_decompress_ptr cinfo,				 JSAMPIMAGE output_buf));  /* Pointer to array of coefficient virtual arrays, or NULL if none */  jvirt_barray_ptr *coef_arrays;};/* Decompression postprocessing (color quantization buffer control) */struct jpeg_d_post_controller {  JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));  JMETHOD(void, post_process_data, (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));};/* Marker reading & parsing */struct jpeg_marker_reader {  JMETHOD(void, reset_marker_reader, (j_decompress_ptr cinfo));  /* Read markers until SOS or EOI.   * Returns same codes as are defined for jpeg_consume_input:   * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.   */  JMETHOD(int, read_markers, (j_decompress_ptr cinfo));  /* Read a restart marker --- exported for use by entropy decoder only */  jpeg_marker_parser_method read_restart_marker;  /* Application-overridable marker processing methods */  jpeg_marker_parser_method process_COM;  jpeg_marker_parser_method process_APPn[16];  /* 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));};/* 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/* 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 * target, size_t bytestozero));/* Constant tables in jutils.c */extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */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 */