nuclear@2: /*
nuclear@2:  * jpegint.h
nuclear@2:  *
nuclear@2:  * Copyright (C) 1991-1997, Thomas G. Lane.
nuclear@2:  * This file is part of the Independent JPEG Group's software.
nuclear@2:  * For conditions of distribution and use, see the accompanying README file.
nuclear@2:  *
nuclear@2:  * This file provides common declarations for the various JPEG modules.
nuclear@2:  * These declarations are considered internal to the JPEG library; most
nuclear@2:  * applications using the library shouldn't need to include this file.
nuclear@2:  */
nuclear@2: 
nuclear@2: 
nuclear@2: /* Declarations for both compression & decompression */
nuclear@2: 
nuclear@2: typedef enum {			/* Operating modes for buffer controllers */
nuclear@2: 	JBUF_PASS_THRU,		/* Plain stripwise operation */
nuclear@2: 	/* Remaining modes require a full-image buffer to have been created */
nuclear@2: 	JBUF_SAVE_SOURCE,	/* Run source subobject only, save output */
nuclear@2: 	JBUF_CRANK_DEST,	/* Run dest subobject only, using saved data */
nuclear@2: 	JBUF_SAVE_AND_PASS	/* Run both subobjects, save output */
nuclear@2: } J_BUF_MODE;
nuclear@2: 
nuclear@2: /* Values of global_state field (jdapi.c has some dependencies on ordering!) */
nuclear@2: #define CSTATE_START	100	/* after create_compress */
nuclear@2: #define CSTATE_SCANNING	101	/* start_compress done, write_scanlines OK */
nuclear@2: #define CSTATE_RAW_OK	102	/* start_compress done, write_raw_data OK */
nuclear@2: #define CSTATE_WRCOEFS	103	/* jpeg_write_coefficients done */
nuclear@2: #define DSTATE_START	200	/* after create_decompress */
nuclear@2: #define DSTATE_INHEADER	201	/* reading header markers, no SOS yet */
nuclear@2: #define DSTATE_READY	202	/* found SOS, ready for start_decompress */
nuclear@2: #define DSTATE_PRELOAD	203	/* reading multiscan file in start_decompress*/
nuclear@2: #define DSTATE_PRESCAN	204	/* performing dummy pass for 2-pass quant */
nuclear@2: #define DSTATE_SCANNING	205	/* start_decompress done, read_scanlines OK */
nuclear@2: #define DSTATE_RAW_OK	206	/* start_decompress done, read_raw_data OK */
nuclear@2: #define DSTATE_BUFIMAGE	207	/* expecting jpeg_start_output */
nuclear@2: #define DSTATE_BUFPOST	208	/* looking for SOS/EOI in jpeg_finish_output */
nuclear@2: #define DSTATE_RDCOEFS	209	/* reading file in jpeg_read_coefficients */
nuclear@2: #define DSTATE_STOPPING	210	/* looking for EOI in jpeg_finish_decompress */
nuclear@2: 
nuclear@2: 
nuclear@2: /* Declarations for compression modules */
nuclear@2: 
nuclear@2: /* Master control module */
nuclear@2: struct jpeg_comp_master {
nuclear@2:   JMETHOD(void, prepare_for_pass, (j_compress_ptr cinfo));
nuclear@2:   JMETHOD(void, pass_startup, (j_compress_ptr cinfo));
nuclear@2:   JMETHOD(void, finish_pass, (j_compress_ptr cinfo));
nuclear@2: 
nuclear@2:   /* State variables made visible to other modules */
nuclear@2:   boolean call_pass_startup;	/* True if pass_startup must be called */
nuclear@2:   boolean is_last_pass;		/* True during last pass */
nuclear@2: };
nuclear@2: 
nuclear@2: /* Main buffer control (downsampled-data buffer) */
nuclear@2: struct jpeg_c_main_controller {
nuclear@2:   JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
nuclear@2:   JMETHOD(void, process_data, (j_compress_ptr cinfo,
nuclear@2: 			       JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
nuclear@2: 			       JDIMENSION in_rows_avail));
nuclear@2: };
nuclear@2: 
nuclear@2: /* Compression preprocessing (downsampling input buffer control) */
nuclear@2: struct jpeg_c_prep_controller {
nuclear@2:   JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
nuclear@2:   JMETHOD(void, pre_process_data, (j_compress_ptr cinfo,
nuclear@2: 				   JSAMPARRAY input_buf,
nuclear@2: 				   JDIMENSION *in_row_ctr,
nuclear@2: 				   JDIMENSION in_rows_avail,
nuclear@2: 				   JSAMPIMAGE output_buf,
nuclear@2: 				   JDIMENSION *out_row_group_ctr,
nuclear@2: 				   JDIMENSION out_row_groups_avail));
nuclear@2: };
nuclear@2: 
nuclear@2: /* Coefficient buffer control */
nuclear@2: struct jpeg_c_coef_controller {
nuclear@2:   JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
nuclear@2:   JMETHOD(boolean, compress_data, (j_compress_ptr cinfo,
nuclear@2: 				   JSAMPIMAGE input_buf));
nuclear@2: };
nuclear@2: 
nuclear@2: /* Colorspace conversion */
nuclear@2: struct jpeg_color_converter {
nuclear@2:   JMETHOD(void, start_pass, (j_compress_ptr cinfo));
nuclear@2:   JMETHOD(void, color_convert, (j_compress_ptr cinfo,
nuclear@2: 				JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
nuclear@2: 				JDIMENSION output_row, int num_rows));
nuclear@2: };
nuclear@2: 
nuclear@2: /* Downsampling */
nuclear@2: struct jpeg_downsampler {
nuclear@2:   JMETHOD(void, start_pass, (j_compress_ptr cinfo));
nuclear@2:   JMETHOD(void, downsample, (j_compress_ptr cinfo,
nuclear@2: 			     JSAMPIMAGE input_buf, JDIMENSION in_row_index,
nuclear@2: 			     JSAMPIMAGE output_buf,
nuclear@2: 			     JDIMENSION out_row_group_index));
nuclear@2: 
nuclear@2:   boolean need_context_rows;	/* TRUE if need rows above & below */
nuclear@2: };
nuclear@2: 
nuclear@2: /* Forward DCT (also controls coefficient quantization) */
nuclear@2: struct jpeg_forward_dct {
nuclear@2:   JMETHOD(void, start_pass, (j_compress_ptr cinfo));
nuclear@2:   /* perhaps this should be an array??? */
nuclear@2:   JMETHOD(void, forward_DCT, (j_compress_ptr cinfo,
nuclear@2: 			      jpeg_component_info * compptr,
nuclear@2: 			      JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
nuclear@2: 			      JDIMENSION start_row, JDIMENSION start_col,
nuclear@2: 			      JDIMENSION num_blocks));
nuclear@2: };
nuclear@2: 
nuclear@2: /* Entropy encoding */
nuclear@2: struct jpeg_entropy_encoder {
nuclear@2:   JMETHOD(void, start_pass, (j_compress_ptr cinfo, boolean gather_statistics));
nuclear@2:   JMETHOD(boolean, encode_mcu, (j_compress_ptr cinfo, JBLOCKROW *MCU_data));
nuclear@2:   JMETHOD(void, finish_pass, (j_compress_ptr cinfo));
nuclear@2: };
nuclear@2: 
nuclear@2: /* Marker writing */
nuclear@2: struct jpeg_marker_writer {
nuclear@2:   JMETHOD(void, write_file_header, (j_compress_ptr cinfo));
nuclear@2:   JMETHOD(void, write_frame_header, (j_compress_ptr cinfo));
nuclear@2:   JMETHOD(void, write_scan_header, (j_compress_ptr cinfo));
nuclear@2:   JMETHOD(void, write_file_trailer, (j_compress_ptr cinfo));
nuclear@2:   JMETHOD(void, write_tables_only, (j_compress_ptr cinfo));
nuclear@2:   /* These routines are exported to allow insertion of extra markers */
nuclear@2:   /* Probably only COM and APPn markers should be written this way */
nuclear@2:   JMETHOD(void, write_marker_header, (j_compress_ptr cinfo, int marker,
nuclear@2: 				      unsigned int datalen));
nuclear@2:   JMETHOD(void, write_marker_byte, (j_compress_ptr cinfo, int val));
nuclear@2: };
nuclear@2: 
nuclear@2: 
nuclear@2: /* Declarations for decompression modules */
nuclear@2: 
nuclear@2: /* Master control module */
nuclear@2: struct jpeg_decomp_master {
nuclear@2:   JMETHOD(void, prepare_for_output_pass, (j_decompress_ptr cinfo));
nuclear@2:   JMETHOD(void, finish_output_pass, (j_decompress_ptr cinfo));
nuclear@2: 
nuclear@2:   /* State variables made visible to other modules */
nuclear@2:   boolean is_dummy_pass;	/* True during 1st pass for 2-pass quant */
nuclear@2: };
nuclear@2: 
nuclear@2: /* Input control module */
nuclear@2: struct jpeg_input_controller {
nuclear@2:   JMETHOD(int, consume_input, (j_decompress_ptr cinfo));
nuclear@2:   JMETHOD(void, reset_input_controller, (j_decompress_ptr cinfo));
nuclear@2:   JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));
nuclear@2:   JMETHOD(void, finish_input_pass, (j_decompress_ptr cinfo));
nuclear@2: 
nuclear@2:   /* State variables made visible to other modules */
nuclear@2:   boolean has_multiple_scans;	/* True if file has multiple scans */
nuclear@2:   boolean eoi_reached;		/* True when EOI has been consumed */
nuclear@2: };
nuclear@2: 
nuclear@2: /* Main buffer control (downsampled-data buffer) */
nuclear@2: struct jpeg_d_main_controller {
nuclear@2:   JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));
nuclear@2:   JMETHOD(void, process_data, (j_decompress_ptr cinfo,
nuclear@2: 			       JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
nuclear@2: 			       JDIMENSION out_rows_avail));
nuclear@2: };
nuclear@2: 
nuclear@2: /* Coefficient buffer control */
nuclear@2: struct jpeg_d_coef_controller {
nuclear@2:   JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));
nuclear@2:   JMETHOD(int, consume_data, (j_decompress_ptr cinfo));
nuclear@2:   JMETHOD(void, start_output_pass, (j_decompress_ptr cinfo));
nuclear@2:   JMETHOD(int, decompress_data, (j_decompress_ptr cinfo,
nuclear@2: 				 JSAMPIMAGE output_buf));
nuclear@2:   /* Pointer to array of coefficient virtual arrays, or NULL if none */
nuclear@2:   jvirt_barray_ptr *coef_arrays;
nuclear@2: };
nuclear@2: 
nuclear@2: /* Decompression postprocessing (color quantization buffer control) */
nuclear@2: struct jpeg_d_post_controller {
nuclear@2:   JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));
nuclear@2:   JMETHOD(void, post_process_data, (j_decompress_ptr cinfo,
nuclear@2: 				    JSAMPIMAGE input_buf,
nuclear@2: 				    JDIMENSION *in_row_group_ctr,
nuclear@2: 				    JDIMENSION in_row_groups_avail,
nuclear@2: 				    JSAMPARRAY output_buf,
nuclear@2: 				    JDIMENSION *out_row_ctr,
nuclear@2: 				    JDIMENSION out_rows_avail));
nuclear@2: };
nuclear@2: 
nuclear@2: /* Marker reading & parsing */
nuclear@2: struct jpeg_marker_reader {
nuclear@2:   JMETHOD(void, reset_marker_reader, (j_decompress_ptr cinfo));
nuclear@2:   /* Read markers until SOS or EOI.
nuclear@2:    * Returns same codes as are defined for jpeg_consume_input:
nuclear@2:    * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
nuclear@2:    */
nuclear@2:   JMETHOD(int, read_markers, (j_decompress_ptr cinfo));
nuclear@2:   /* Read a restart marker --- exported for use by entropy decoder only */
nuclear@2:   jpeg_marker_parser_method read_restart_marker;
nuclear@2: 
nuclear@2:   /* State of marker reader --- nominally internal, but applications
nuclear@2:    * supplying COM or APPn handlers might like to know the state.
nuclear@2:    */
nuclear@2:   boolean saw_SOI;		/* found SOI? */
nuclear@2:   boolean saw_SOF;		/* found SOF? */
nuclear@2:   int next_restart_num;		/* next restart number expected (0-7) */
nuclear@2:   unsigned int discarded_bytes;	/* # of bytes skipped looking for a marker */
nuclear@2: };
nuclear@2: 
nuclear@2: /* Entropy decoding */
nuclear@2: struct jpeg_entropy_decoder {
nuclear@2:   JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
nuclear@2:   JMETHOD(boolean, decode_mcu, (j_decompress_ptr cinfo,
nuclear@2: 				JBLOCKROW *MCU_data));
nuclear@2: 
nuclear@2:   /* This is here to share code between baseline and progressive decoders; */
nuclear@2:   /* other modules probably should not use it */
nuclear@2:   boolean insufficient_data;	/* set TRUE after emitting warning */
nuclear@2: };
nuclear@2: 
nuclear@2: /* Inverse DCT (also performs dequantization) */
nuclear@2: typedef JMETHOD(void, inverse_DCT_method_ptr,
nuclear@2: 		(j_decompress_ptr cinfo, jpeg_component_info * compptr,
nuclear@2: 		 JCOEFPTR coef_block,
nuclear@2: 		 JSAMPARRAY output_buf, JDIMENSION output_col));
nuclear@2: 
nuclear@2: struct jpeg_inverse_dct {
nuclear@2:   JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
nuclear@2:   /* It is useful to allow each component to have a separate IDCT method. */
nuclear@2:   inverse_DCT_method_ptr inverse_DCT[MAX_COMPONENTS];
nuclear@2: };
nuclear@2: 
nuclear@2: /* Upsampling (note that upsampler must also call color converter) */
nuclear@2: struct jpeg_upsampler {
nuclear@2:   JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
nuclear@2:   JMETHOD(void, upsample, (j_decompress_ptr cinfo,
nuclear@2: 			   JSAMPIMAGE input_buf,
nuclear@2: 			   JDIMENSION *in_row_group_ctr,
nuclear@2: 			   JDIMENSION in_row_groups_avail,
nuclear@2: 			   JSAMPARRAY output_buf,
nuclear@2: 			   JDIMENSION *out_row_ctr,
nuclear@2: 			   JDIMENSION out_rows_avail));
nuclear@2: 
nuclear@2:   boolean need_context_rows;	/* TRUE if need rows above & below */
nuclear@2: };
nuclear@2: 
nuclear@2: /* Colorspace conversion */
nuclear@2: struct jpeg_color_deconverter {
nuclear@2:   JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
nuclear@2:   JMETHOD(void, color_convert, (j_decompress_ptr cinfo,
nuclear@2: 				JSAMPIMAGE input_buf, JDIMENSION input_row,
nuclear@2: 				JSAMPARRAY output_buf, int num_rows));
nuclear@2: };
nuclear@2: 
nuclear@2: /* Color quantization or color precision reduction */
nuclear@2: struct jpeg_color_quantizer {
nuclear@2:   JMETHOD(void, start_pass, (j_decompress_ptr cinfo, boolean is_pre_scan));
nuclear@2:   JMETHOD(void, color_quantize, (j_decompress_ptr cinfo,
nuclear@2: 				 JSAMPARRAY input_buf, JSAMPARRAY output_buf,
nuclear@2: 				 int num_rows));
nuclear@2:   JMETHOD(void, finish_pass, (j_decompress_ptr cinfo));
nuclear@2:   JMETHOD(void, new_color_map, (j_decompress_ptr cinfo));
nuclear@2: };
nuclear@2: 
nuclear@2: 
nuclear@2: /* Miscellaneous useful macros */
nuclear@2: 
nuclear@2: #undef MAX
nuclear@2: #define MAX(a,b)	((a) > (b) ? (a) : (b))
nuclear@2: #undef MIN
nuclear@2: #define MIN(a,b)	((a) < (b) ? (a) : (b))
nuclear@2: 
nuclear@2: 
nuclear@2: /* We assume that right shift corresponds to signed division by 2 with
nuclear@2:  * rounding towards minus infinity.  This is correct for typical "arithmetic
nuclear@2:  * shift" instructions that shift in copies of the sign bit.  But some
nuclear@2:  * C compilers implement >> with an unsigned shift.  For these machines you
nuclear@2:  * must define RIGHT_SHIFT_IS_UNSIGNED.
nuclear@2:  * RIGHT_SHIFT provides a proper signed right shift of an INT32 quantity.
nuclear@2:  * It is only applied with constant shift counts.  SHIFT_TEMPS must be
nuclear@2:  * included in the variables of any routine using RIGHT_SHIFT.
nuclear@2:  */
nuclear@2: 
nuclear@2: #ifdef RIGHT_SHIFT_IS_UNSIGNED
nuclear@2: #define SHIFT_TEMPS	INT32 shift_temp;
nuclear@2: #define RIGHT_SHIFT(x,shft)  \
nuclear@2: 	((shift_temp = (x)) < 0 ? \
nuclear@2: 	 (shift_temp >> (shft)) | ((~((INT32) 0)) << (32-(shft))) : \
nuclear@2: 	 (shift_temp >> (shft)))
nuclear@2: #else
nuclear@2: #define SHIFT_TEMPS
nuclear@2: #define RIGHT_SHIFT(x,shft)	((x) >> (shft))
nuclear@2: #endif
nuclear@2: 
nuclear@2: 
nuclear@2: /* Short forms of external names for systems with brain-damaged linkers. */
nuclear@2: 
nuclear@2: #ifdef NEED_SHORT_EXTERNAL_NAMES
nuclear@2: #define jinit_compress_master	jICompress
nuclear@2: #define jinit_c_master_control	jICMaster
nuclear@2: #define jinit_c_main_controller	jICMainC
nuclear@2: #define jinit_c_prep_controller	jICPrepC
nuclear@2: #define jinit_c_coef_controller	jICCoefC
nuclear@2: #define jinit_color_converter	jICColor
nuclear@2: #define jinit_downsampler	jIDownsampler
nuclear@2: #define jinit_forward_dct	jIFDCT
nuclear@2: #define jinit_huff_encoder	jIHEncoder
nuclear@2: #define jinit_phuff_encoder	jIPHEncoder
nuclear@2: #define jinit_marker_writer	jIMWriter
nuclear@2: #define jinit_master_decompress	jIDMaster
nuclear@2: #define jinit_d_main_controller	jIDMainC
nuclear@2: #define jinit_d_coef_controller	jIDCoefC
nuclear@2: #define jinit_d_post_controller	jIDPostC
nuclear@2: #define jinit_input_controller	jIInCtlr
nuclear@2: #define jinit_marker_reader	jIMReader
nuclear@2: #define jinit_huff_decoder	jIHDecoder
nuclear@2: #define jinit_phuff_decoder	jIPHDecoder
nuclear@2: #define jinit_inverse_dct	jIIDCT
nuclear@2: #define jinit_upsampler		jIUpsampler
nuclear@2: #define jinit_color_deconverter	jIDColor
nuclear@2: #define jinit_1pass_quantizer	jI1Quant
nuclear@2: #define jinit_2pass_quantizer	jI2Quant
nuclear@2: #define jinit_merged_upsampler	jIMUpsampler
nuclear@2: #define jinit_memory_mgr	jIMemMgr
nuclear@2: #define jdiv_round_up		jDivRound
nuclear@2: #define jround_up		jRound
nuclear@2: #define jcopy_sample_rows	jCopySamples
nuclear@2: #define jcopy_block_row		jCopyBlocks
nuclear@2: #define jzero_far		jZeroFar
nuclear@2: #define jpeg_zigzag_order	jZIGTable
nuclear@2: #define jpeg_natural_order	jZAGTable
nuclear@2: #endif /* NEED_SHORT_EXTERNAL_NAMES */
nuclear@2: 
nuclear@2: 
nuclear@2: /* Compression module initialization routines */
nuclear@2: EXTERN(void) jinit_compress_master JPP((j_compress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_c_master_control JPP((j_compress_ptr cinfo,
nuclear@2: 					 boolean transcode_only));
nuclear@2: EXTERN(void) jinit_c_main_controller JPP((j_compress_ptr cinfo,
nuclear@2: 					  boolean need_full_buffer));
nuclear@2: EXTERN(void) jinit_c_prep_controller JPP((j_compress_ptr cinfo,
nuclear@2: 					  boolean need_full_buffer));
nuclear@2: EXTERN(void) jinit_c_coef_controller JPP((j_compress_ptr cinfo,
nuclear@2: 					  boolean need_full_buffer));
nuclear@2: EXTERN(void) jinit_color_converter JPP((j_compress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_downsampler JPP((j_compress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_forward_dct JPP((j_compress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_huff_encoder JPP((j_compress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_phuff_encoder JPP((j_compress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_marker_writer JPP((j_compress_ptr cinfo));
nuclear@2: /* Decompression module initialization routines */
nuclear@2: EXTERN(void) jinit_master_decompress JPP((j_decompress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_d_main_controller JPP((j_decompress_ptr cinfo,
nuclear@2: 					  boolean need_full_buffer));
nuclear@2: EXTERN(void) jinit_d_coef_controller JPP((j_decompress_ptr cinfo,
nuclear@2: 					  boolean need_full_buffer));
nuclear@2: EXTERN(void) jinit_d_post_controller JPP((j_decompress_ptr cinfo,
nuclear@2: 					  boolean need_full_buffer));
nuclear@2: EXTERN(void) jinit_input_controller JPP((j_decompress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_marker_reader JPP((j_decompress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_huff_decoder JPP((j_decompress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_phuff_decoder JPP((j_decompress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_inverse_dct JPP((j_decompress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_upsampler JPP((j_decompress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_color_deconverter JPP((j_decompress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_1pass_quantizer JPP((j_decompress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_2pass_quantizer JPP((j_decompress_ptr cinfo));
nuclear@2: EXTERN(void) jinit_merged_upsampler JPP((j_decompress_ptr cinfo));
nuclear@2: /* Memory manager initialization */
nuclear@2: EXTERN(void) jinit_memory_mgr JPP((j_common_ptr cinfo));
nuclear@2: 
nuclear@2: /* Utility routines in jutils.c */
nuclear@2: EXTERN(long) jdiv_round_up JPP((long a, long b));
nuclear@2: EXTERN(long) jround_up JPP((long a, long b));
nuclear@2: EXTERN(void) jcopy_sample_rows JPP((JSAMPARRAY input_array, int source_row,
nuclear@2: 				    JSAMPARRAY output_array, int dest_row,
nuclear@2: 				    int num_rows, JDIMENSION num_cols));
nuclear@2: EXTERN(void) jcopy_block_row JPP((JBLOCKROW input_row, JBLOCKROW output_row,
nuclear@2: 				  JDIMENSION num_blocks));
nuclear@2: EXTERN(void) jzero_far JPP((void FAR * target, size_t bytestozero));
nuclear@2: /* Constant tables in jutils.c */
nuclear@2: #if 0				/* This table is not actually needed in v6a */
nuclear@2: extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */
nuclear@2: #endif
nuclear@2: extern const int jpeg_natural_order[]; /* zigzag coef order to natural order */
nuclear@2: 
nuclear@2: /* Suppress undefined-structure complaints if necessary. */
nuclear@2: 
nuclear@2: #ifdef INCOMPLETE_TYPES_BROKEN
nuclear@2: #ifndef AM_MEMORY_MANAGER	/* only jmemmgr.c defines these */
nuclear@2: struct jvirt_sarray_control { long dummy; };
nuclear@2: struct jvirt_barray_control { long dummy; };
nuclear@2: #endif
nuclear@2: #endif /* INCOMPLETE_TYPES_BROKEN */