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/*
 * 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));
};
 
/* 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 {
  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));
  /* These routines are exported to allow insertion of extra markers */
  /* Probably only COM and APPn markers should be written this way */
  JMETHOD(void, write_marker_header, (j_compress_ptr cinfo, int marker,
                                      unsigned int datalen));
  JMETHOD(void, write_marker_byte, (j_compress_ptr cinfo, int val));
};
 
 
/* 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;
 
  /* 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 */
#endif
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 */

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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [services/] [gfx/] [mw/] [v2_0/] [src/] [jpeg-6b/] [jpegint.h] - Blame information for rev 174

Line No.	Rev	Author	Line
1	27	unneback	`/*`
2			`* jpegint.h`
3			`*`
4			`* Copyright (C) 1991-1997, Thomas G. Lane.`
5			`* This file is part of the Independent JPEG Group's software.`
6			`* For conditions of distribution and use, see the accompanying README file.`
7			`*`
8			`* This file provides common declarations for the various JPEG modules.`
9			`* These declarations are considered internal to the JPEG library; most`
10			`* applications using the library shouldn't need to include this file.`
11			`*/`
12
13
14			`/* Declarations for both compression & decompression */`
15
16			`typedef enum { /* Operating modes for buffer controllers */`
17			`JBUF_PASS_THRU, /* Plain stripwise operation */`
18			`/* Remaining modes require a full-image buffer to have been created */`
19			`JBUF_SAVE_SOURCE, /* Run source subobject only, save output */`
20			`JBUF_CRANK_DEST, /* Run dest subobject only, using saved data */`
21			`JBUF_SAVE_AND_PASS /* Run both subobjects, save output */`
22			`} J_BUF_MODE;`
23
24			`/* Values of global_state field (jdapi.c has some dependencies on ordering!) */`
25			`#define CSTATE_START 100 /* after create_compress */`
26			`#define CSTATE_SCANNING 101 /* start_compress done, write_scanlines OK */`
27			`#define CSTATE_RAW_OK 102 /* start_compress done, write_raw_data OK */`
28			`#define CSTATE_WRCOEFS 103 /* jpeg_write_coefficients done */`
29			`#define DSTATE_START 200 /* after create_decompress */`
30			`#define DSTATE_INHEADER 201 /* reading header markers, no SOS yet */`
31			`#define DSTATE_READY 202 /* found SOS, ready for start_decompress */`
32			`#define DSTATE_PRELOAD 203 /* reading multiscan file in start_decompress*/`
33			`#define DSTATE_PRESCAN 204 /* performing dummy pass for 2-pass quant */`
34			`#define DSTATE_SCANNING 205 /* start_decompress done, read_scanlines OK */`
35			`#define DSTATE_RAW_OK 206 /* start_decompress done, read_raw_data OK */`
36			`#define DSTATE_BUFIMAGE 207 /* expecting jpeg_start_output */`
37			`#define DSTATE_BUFPOST 208 /* looking for SOS/EOI in jpeg_finish_output */`
38			`#define DSTATE_RDCOEFS 209 /* reading file in jpeg_read_coefficients */`
39			`#define DSTATE_STOPPING 210 /* looking for EOI in jpeg_finish_decompress */`
40
41
42			`/* Declarations for compression modules */`
43
44			`/* Master control module */`
45			`struct jpeg_comp_master {`
46			`JMETHOD(void, prepare_for_pass, (j_compress_ptr cinfo));`
47			`JMETHOD(void, pass_startup, (j_compress_ptr cinfo));`
48			`JMETHOD(void, finish_pass, (j_compress_ptr cinfo));`
49
50			`/* State variables made visible to other modules */`
51			`boolean call_pass_startup; /* True if pass_startup must be called */`
52			`boolean is_last_pass; /* True during last pass */`
53			`};`
54
55			`/* Main buffer control (downsampled-data buffer) */`
56			`struct jpeg_c_main_controller {`
57			`JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));`
58			`JMETHOD(void, process_data, (j_compress_ptr cinfo,`
59			`JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,`
60			`JDIMENSION in_rows_avail));`
61			`};`
62
63			`/* Compression preprocessing (downsampling input buffer control) */`
64			`struct jpeg_c_prep_controller {`
65			`JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));`
66			`JMETHOD(void, pre_process_data, (j_compress_ptr cinfo,`
67			`JSAMPARRAY input_buf,`
68			`JDIMENSION *in_row_ctr,`
69			`JDIMENSION in_rows_avail,`
70			`JSAMPIMAGE output_buf,`
71			`JDIMENSION *out_row_group_ctr,`
72			`JDIMENSION out_row_groups_avail));`
73			`};`
74
75			`/* Coefficient buffer control */`
76			`struct jpeg_c_coef_controller {`
77			`JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));`
78			`JMETHOD(boolean, compress_data, (j_compress_ptr cinfo,`
79			`JSAMPIMAGE input_buf));`
80			`};`
81
82			`/* Colorspace conversion */`
83			`struct jpeg_color_converter {`
84			`JMETHOD(void, start_pass, (j_compress_ptr cinfo));`
85			`JMETHOD(void, color_convert, (j_compress_ptr cinfo,`
86			`JSAMPARRAY input_buf, JSAMPIMAGE output_buf,`
87			`JDIMENSION output_row, int num_rows));`
88			`};`
89
90			`/* Downsampling */`
91			`struct jpeg_downsampler {`
92			`JMETHOD(void, start_pass, (j_compress_ptr cinfo));`
93			`JMETHOD(void, downsample, (j_compress_ptr cinfo,`
94			`JSAMPIMAGE input_buf, JDIMENSION in_row_index,`
95			`JSAMPIMAGE output_buf,`
96			`JDIMENSION out_row_group_index));`
97
98			`boolean need_context_rows; /* TRUE if need rows above & below */`
99			`};`
100
101			`/* Forward DCT (also controls coefficient quantization) */`
102			`struct jpeg_forward_dct {`
103			`JMETHOD(void, start_pass, (j_compress_ptr cinfo));`
104			`/* perhaps this should be an array??? */`
105			`JMETHOD(void, forward_DCT, (j_compress_ptr cinfo,`
106			`jpeg_component_info * compptr,`
107			`JSAMPARRAY sample_data, JBLOCKROW coef_blocks,`
108			`JDIMENSION start_row, JDIMENSION start_col,`
109			`JDIMENSION num_blocks));`
110			`};`
111
112			`/* Entropy encoding */`
113			`struct jpeg_entropy_encoder {`
114			`JMETHOD(void, start_pass, (j_compress_ptr cinfo, boolean gather_statistics));`
115			`JMETHOD(boolean, encode_mcu, (j_compress_ptr cinfo, JBLOCKROW *MCU_data));`
116			`JMETHOD(void, finish_pass, (j_compress_ptr cinfo));`
117			`};`
118
119			`/* Marker writing */`
120			`struct jpeg_marker_writer {`
121			`JMETHOD(void, write_file_header, (j_compress_ptr cinfo));`
122			`JMETHOD(void, write_frame_header, (j_compress_ptr cinfo));`
123			`JMETHOD(void, write_scan_header, (j_compress_ptr cinfo));`
124			`JMETHOD(void, write_file_trailer, (j_compress_ptr cinfo));`
125			`JMETHOD(void, write_tables_only, (j_compress_ptr cinfo));`
126			`/* These routines are exported to allow insertion of extra markers */`
127			`/* Probably only COM and APPn markers should be written this way */`
128			`JMETHOD(void, write_marker_header, (j_compress_ptr cinfo, int marker,`
129			`unsigned int datalen));`
130			`JMETHOD(void, write_marker_byte, (j_compress_ptr cinfo, int val));`
131			`};`
132
133
134			`/* Declarations for decompression modules */`
135
136			`/* Master control module */`
137			`struct jpeg_decomp_master {`
138			`JMETHOD(void, prepare_for_output_pass, (j_decompress_ptr cinfo));`
139			`JMETHOD(void, finish_output_pass, (j_decompress_ptr cinfo));`
140
141			`/* State variables made visible to other modules */`
142			`boolean is_dummy_pass; /* True during 1st pass for 2-pass quant */`
143			`};`
144
145			`/* Input control module */`
146			`struct jpeg_input_controller {`
147			`JMETHOD(int, consume_input, (j_decompress_ptr cinfo));`
148			`JMETHOD(void, reset_input_controller, (j_decompress_ptr cinfo));`
149			`JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));`
150			`JMETHOD(void, finish_input_pass, (j_decompress_ptr cinfo));`
151
152			`/* State variables made visible to other modules */`
153			`boolean has_multiple_scans; /* True if file has multiple scans */`
154			`boolean eoi_reached; /* True when EOI has been consumed */`
155			`};`
156
157			`/* Main buffer control (downsampled-data buffer) */`
158			`struct jpeg_d_main_controller {`
159			`JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));`
160			`JMETHOD(void, process_data, (j_decompress_ptr cinfo,`
161			`JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,`
162			`JDIMENSION out_rows_avail));`
163			`};`
164
165			`/* Coefficient buffer control */`
166			`struct jpeg_d_coef_controller {`
167			`JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));`
168			`JMETHOD(int, consume_data, (j_decompress_ptr cinfo));`
169			`JMETHOD(void, start_output_pass, (j_decompress_ptr cinfo));`
170			`JMETHOD(int, decompress_data, (j_decompress_ptr cinfo,`
171			`JSAMPIMAGE output_buf));`
172			`/* Pointer to array of coefficient virtual arrays, or NULL if none */`
173			`jvirt_barray_ptr *coef_arrays;`
174			`};`
175
176			`/* Decompression postprocessing (color quantization buffer control) */`
177			`struct jpeg_d_post_controller {`
178			`JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));`
179			`JMETHOD(void, post_process_data, (j_decompress_ptr cinfo,`
180			`JSAMPIMAGE input_buf,`
181			`JDIMENSION *in_row_group_ctr,`
182			`JDIMENSION in_row_groups_avail,`
183			`JSAMPARRAY output_buf,`
184			`JDIMENSION *out_row_ctr,`
185			`JDIMENSION out_rows_avail));`
186			`};`
187
188			`/* Marker reading & parsing */`
189			`struct jpeg_marker_reader {`
190			`JMETHOD(void, reset_marker_reader, (j_decompress_ptr cinfo));`
191			`/* Read markers until SOS or EOI.`
192			`* Returns same codes as are defined for jpeg_consume_input:`
193			`* JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.`
194			`*/`
195			`JMETHOD(int, read_markers, (j_decompress_ptr cinfo));`
196			`/* Read a restart marker --- exported for use by entropy decoder only */`
197			`jpeg_marker_parser_method read_restart_marker;`
198
199			`/* State of marker reader --- nominally internal, but applications`
200			`* supplying COM or APPn handlers might like to know the state.`
201			`*/`
202			`boolean saw_SOI; /* found SOI? */`
203			`boolean saw_SOF; /* found SOF? */`
204			`int next_restart_num; /* next restart number expected (0-7) */`
205			`unsigned int discarded_bytes; /* # of bytes skipped looking for a marker */`
206			`};`
207
208			`/* Entropy decoding */`
209			`struct jpeg_entropy_decoder {`
210			`JMETHOD(void, start_pass, (j_decompress_ptr cinfo));`
211			`JMETHOD(boolean, decode_mcu, (j_decompress_ptr cinfo,`
212			`JBLOCKROW *MCU_data));`
213
214			`/* This is here to share code between baseline and progressive decoders; */`
215			`/* other modules probably should not use it */`
216			`boolean insufficient_data; /* set TRUE after emitting warning */`
217			`};`
218
219			`/* Inverse DCT (also performs dequantization) */`
220			`typedef JMETHOD(void, inverse_DCT_method_ptr,`
221			`(j_decompress_ptr cinfo, jpeg_component_info * compptr,`
222			`JCOEFPTR coef_block,`
223			`JSAMPARRAY output_buf, JDIMENSION output_col));`
224
225			`struct jpeg_inverse_dct {`
226			`JMETHOD(void, start_pass, (j_decompress_ptr cinfo));`
227			`/* It is useful to allow each component to have a separate IDCT method. */`
228			`inverse_DCT_method_ptr inverse_DCT[MAX_COMPONENTS];`
229			`};`
230
231			`/* Upsampling (note that upsampler must also call color converter) */`
232			`struct jpeg_upsampler {`
233			`JMETHOD(void, start_pass, (j_decompress_ptr cinfo));`
234			`JMETHOD(void, upsample, (j_decompress_ptr cinfo,`
235			`JSAMPIMAGE input_buf,`
236			`JDIMENSION *in_row_group_ctr,`
237			`JDIMENSION in_row_groups_avail,`
238			`JSAMPARRAY output_buf,`
239			`JDIMENSION *out_row_ctr,`
240			`JDIMENSION out_rows_avail));`
241
242			`boolean need_context_rows; /* TRUE if need rows above & below */`
243			`};`
244
245			`/* Colorspace conversion */`
246			`struct jpeg_color_deconverter {`
247			`JMETHOD(void, start_pass, (j_decompress_ptr cinfo));`
248			`JMETHOD(void, color_convert, (j_decompress_ptr cinfo,`
249			`JSAMPIMAGE input_buf, JDIMENSION input_row,`
250			`JSAMPARRAY output_buf, int num_rows));`
251			`};`
252
253			`/* Color quantization or color precision reduction */`
254			`struct jpeg_color_quantizer {`
255			`JMETHOD(void, start_pass, (j_decompress_ptr cinfo, boolean is_pre_scan));`
256			`JMETHOD(void, color_quantize, (j_decompress_ptr cinfo,`
257			`JSAMPARRAY input_buf, JSAMPARRAY output_buf,`
258			`int num_rows));`
259			`JMETHOD(void, finish_pass, (j_decompress_ptr cinfo));`
260			`JMETHOD(void, new_color_map, (j_decompress_ptr cinfo));`
261			`};`
262
263
264			`/* Miscellaneous useful macros */`
265
266			`#undef MAX`
267			`#define MAX(a,b) ((a) > (b) ? (a) : (b))`
268			`#undef MIN`
269			`#define MIN(a,b) ((a) < (b) ? (a) : (b))`
270
271
272			`/* We assume that right shift corresponds to signed division by 2 with`
273			`* rounding towards minus infinity. This is correct for typical "arithmetic`
274			`* shift" instructions that shift in copies of the sign bit. But some`
275			`* C compilers implement >> with an unsigned shift. For these machines you`
276			`* must define RIGHT_SHIFT_IS_UNSIGNED.`
277			`* RIGHT_SHIFT provides a proper signed right shift of an INT32 quantity.`
278			`* It is only applied with constant shift counts. SHIFT_TEMPS must be`
279			`* included in the variables of any routine using RIGHT_SHIFT.`
280			`*/`
281
282			`#ifdef RIGHT_SHIFT_IS_UNSIGNED`
283			`#define SHIFT_TEMPS INT32 shift_temp;`
284			`#define RIGHT_SHIFT(x,shft) \`
285			`((shift_temp = (x)) < 0 ? \`
286			`(shift_temp >> (shft)) \| ((~((INT32) 0)) << (32-(shft))) : \`
287			`(shift_temp >> (shft)))`
288			`#else`
289			`#define SHIFT_TEMPS`
290			`#define RIGHT_SHIFT(x,shft) ((x) >> (shft))`
291			`#endif`
292
293
294			`/* Short forms of external names for systems with brain-damaged linkers. */`
295
296			`#ifdef NEED_SHORT_EXTERNAL_NAMES`
297			`#define jinit_compress_master jICompress`
298			`#define jinit_c_master_control jICMaster`
299			`#define jinit_c_main_controller jICMainC`
300			`#define jinit_c_prep_controller jICPrepC`
301			`#define jinit_c_coef_controller jICCoefC`
302			`#define jinit_color_converter jICColor`
303			`#define jinit_downsampler jIDownsampler`
304			`#define jinit_forward_dct jIFDCT`
305			`#define jinit_huff_encoder jIHEncoder`
306			`#define jinit_phuff_encoder jIPHEncoder`
307			`#define jinit_marker_writer jIMWriter`
308			`#define jinit_master_decompress jIDMaster`
309			`#define jinit_d_main_controller jIDMainC`
310			`#define jinit_d_coef_controller jIDCoefC`
311			`#define jinit_d_post_controller jIDPostC`
312			`#define jinit_input_controller jIInCtlr`
313			`#define jinit_marker_reader jIMReader`
314			`#define jinit_huff_decoder jIHDecoder`
315			`#define jinit_phuff_decoder jIPHDecoder`
316			`#define jinit_inverse_dct jIIDCT`
317			`#define jinit_upsampler jIUpsampler`
318			`#define jinit_color_deconverter jIDColor`
319			`#define jinit_1pass_quantizer jI1Quant`
320			`#define jinit_2pass_quantizer jI2Quant`
321			`#define jinit_merged_upsampler jIMUpsampler`
322			`#define jinit_memory_mgr jIMemMgr`
323			`#define jdiv_round_up jDivRound`
324			`#define jround_up jRound`
325			`#define jcopy_sample_rows jCopySamples`
326			`#define jcopy_block_row jCopyBlocks`
327			`#define jzero_far jZeroFar`
328			`#define jpeg_zigzag_order jZIGTable`
329			`#define jpeg_natural_order jZAGTable`
330			`#endif /* NEED_SHORT_EXTERNAL_NAMES */`
331
332
333			`/* Compression module initialization routines */`
334			`EXTERN(void) jinit_compress_master JPP((j_compress_ptr cinfo));`
335			`EXTERN(void) jinit_c_master_control JPP((j_compress_ptr cinfo,`
336			`boolean transcode_only));`
337			`EXTERN(void) jinit_c_main_controller JPP((j_compress_ptr cinfo,`
338			`boolean need_full_buffer));`
339			`EXTERN(void) jinit_c_prep_controller JPP((j_compress_ptr cinfo,`
340			`boolean need_full_buffer));`
341			`EXTERN(void) jinit_c_coef_controller JPP((j_compress_ptr cinfo,`
342			`boolean need_full_buffer));`
343			`EXTERN(void) jinit_color_converter JPP((j_compress_ptr cinfo));`
344			`EXTERN(void) jinit_downsampler JPP((j_compress_ptr cinfo));`
345			`EXTERN(void) jinit_forward_dct JPP((j_compress_ptr cinfo));`
346			`EXTERN(void) jinit_huff_encoder JPP((j_compress_ptr cinfo));`
347			`EXTERN(void) jinit_phuff_encoder JPP((j_compress_ptr cinfo));`
348			`EXTERN(void) jinit_marker_writer JPP((j_compress_ptr cinfo));`
349			`/* Decompression module initialization routines */`
350			`EXTERN(void) jinit_master_decompress JPP((j_decompress_ptr cinfo));`
351			`EXTERN(void) jinit_d_main_controller JPP((j_decompress_ptr cinfo,`
352			`boolean need_full_buffer));`
353			`EXTERN(void) jinit_d_coef_controller JPP((j_decompress_ptr cinfo,`
354			`boolean need_full_buffer));`
355			`EXTERN(void) jinit_d_post_controller JPP((j_decompress_ptr cinfo,`
356			`boolean need_full_buffer));`
357			`EXTERN(void) jinit_input_controller JPP((j_decompress_ptr cinfo));`
358			`EXTERN(void) jinit_marker_reader JPP((j_decompress_ptr cinfo));`
359			`EXTERN(void) jinit_huff_decoder JPP((j_decompress_ptr cinfo));`
360			`EXTERN(void) jinit_phuff_decoder JPP((j_decompress_ptr cinfo));`
361			`EXTERN(void) jinit_inverse_dct JPP((j_decompress_ptr cinfo));`
362			`EXTERN(void) jinit_upsampler JPP((j_decompress_ptr cinfo));`
363			`EXTERN(void) jinit_color_deconverter JPP((j_decompress_ptr cinfo));`
364			`EXTERN(void) jinit_1pass_quantizer JPP((j_decompress_ptr cinfo));`
365			`EXTERN(void) jinit_2pass_quantizer JPP((j_decompress_ptr cinfo));`
366			`EXTERN(void) jinit_merged_upsampler JPP((j_decompress_ptr cinfo));`
367			`/* Memory manager initialization */`
368			`EXTERN(void) jinit_memory_mgr JPP((j_common_ptr cinfo));`
369
370			`/* Utility routines in jutils.c */`
371			`EXTERN(long) jdiv_round_up JPP((long a, long b));`
372			`EXTERN(long) jround_up JPP((long a, long b));`
373			`EXTERN(void) jcopy_sample_rows JPP((JSAMPARRAY input_array, int source_row,`
374			`JSAMPARRAY output_array, int dest_row,`
375			`int num_rows, JDIMENSION num_cols));`
376			`EXTERN(void) jcopy_block_row JPP((JBLOCKROW input_row, JBLOCKROW output_row,`
377			`JDIMENSION num_blocks));`
378			`EXTERN(void) jzero_far JPP((void FAR * target, size_t bytestozero));`
379			`/* Constant tables in jutils.c */`
380			`#if 0 /* This table is not actually needed in v6a */`
381			`extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */`
382			`#endif`
383			`extern const int jpeg_natural_order[]; /* zigzag coef order to natural order */`
384
385			`/* Suppress undefined-structure complaints if necessary. */`
386
387			`#ifdef INCOMPLETE_TYPES_BROKEN`
388			`#ifndef AM_MEMORY_MANAGER /* only jmemmgr.c defines these */`
389			`struct jvirt_sarray_control { long dummy; };`
390			`struct jvirt_barray_control { long dummy; };`
391			`#endif`
392			`#endif /* INCOMPLETE_TYPES_BROKEN */`