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| 1 /* |
| 2 * cdjpeg.h |
| 3 * |
| 4 * Copyright (C) 1994-1997, 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 contains common declarations for the sample applications |
| 9 * cjpeg and djpeg. It is NOT used by the core JPEG library. |
| 10 */ |
| 11 |
| 12 #define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */ |
| 13 #define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */ |
| 14 #include "jinclude.h" |
| 15 #include "jpeglib.h" |
| 16 #include "jerror.h" /* get library error codes too */ |
| 17 #include "cderror.h" /* get application-specific error codes */ |
| 18 |
| 19 |
| 20 /* |
| 21 * Object interface for cjpeg's source file decoding modules |
| 22 */ |
| 23 |
| 24 typedef struct cjpeg_source_struct * cjpeg_source_ptr; |
| 25 |
| 26 struct cjpeg_source_struct { |
| 27 JMETHOD(void, start_input, (j_compress_ptr cinfo, |
| 28 cjpeg_source_ptr sinfo)); |
| 29 JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo, |
| 30 cjpeg_source_ptr sinfo)); |
| 31 JMETHOD(void, finish_input, (j_compress_ptr cinfo, |
| 32 cjpeg_source_ptr sinfo)); |
| 33 |
| 34 FILE *input_file; |
| 35 |
| 36 JSAMPARRAY buffer; |
| 37 JDIMENSION buffer_height; |
| 38 }; |
| 39 |
| 40 |
| 41 /* |
| 42 * Object interface for djpeg's output file encoding modules |
| 43 */ |
| 44 |
| 45 typedef struct djpeg_dest_struct * djpeg_dest_ptr; |
| 46 |
| 47 struct djpeg_dest_struct { |
| 48 /* start_output is called after jpeg_start_decompress finishes. |
| 49 * The color map will be ready at this time, if one is needed. |
| 50 */ |
| 51 JMETHOD(void, start_output, (j_decompress_ptr cinfo, |
| 52 djpeg_dest_ptr dinfo)); |
| 53 /* Emit the specified number of pixel rows from the buffer. */ |
| 54 JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo, |
| 55 djpeg_dest_ptr dinfo, |
| 56 JDIMENSION rows_supplied)); |
| 57 /* Finish up at the end of the image. */ |
| 58 JMETHOD(void, finish_output, (j_decompress_ptr cinfo, |
| 59 djpeg_dest_ptr dinfo)); |
| 60 |
| 61 /* Target file spec; filled in by djpeg.c after object is created. */ |
| 62 FILE * output_file; |
| 63 |
| 64 /* Output pixel-row buffer. Created by module init or start_output. |
| 65 * Width is cinfo->output_width * cinfo->output_components; |
| 66 * height is buffer_height. |
| 67 */ |
| 68 JSAMPARRAY buffer; |
| 69 JDIMENSION buffer_height; |
| 70 }; |
| 71 |
| 72 |
| 73 /* |
| 74 * cjpeg/djpeg may need to perform extra passes to convert to or from |
| 75 * the source/destination file format. The JPEG library does not know |
| 76 * about these passes, but we'd like them to be counted by the progress |
| 77 * monitor. We use an expanded progress monitor object to hold the |
| 78 * additional pass count. |
| 79 */ |
| 80 |
| 81 struct cdjpeg_progress_mgr { |
| 82 struct jpeg_progress_mgr pub; /* fields known to JPEG library */ |
| 83 int completed_extra_passes; /* extra passes completed */ |
| 84 int total_extra_passes; /* total extra */ |
| 85 /* last printed percentage stored here to avoid multiple printouts */ |
| 86 int percent_done; |
| 87 }; |
| 88 |
| 89 typedef struct cdjpeg_progress_mgr * cd_progress_ptr; |
| 90 |
| 91 |
| 92 /* Short forms of external names for systems with brain-damaged linkers. */ |
| 93 |
| 94 #ifdef NEED_SHORT_EXTERNAL_NAMES |
| 95 #define jinit_read_bmp jIRdBMP |
| 96 #define jinit_write_bmp jIWrBMP |
| 97 #define jinit_read_gif jIRdGIF |
| 98 #define jinit_write_gif jIWrGIF |
| 99 #define jinit_read_ppm jIRdPPM |
| 100 #define jinit_write_ppm jIWrPPM |
| 101 #define jinit_read_rle jIRdRLE |
| 102 #define jinit_write_rle jIWrRLE |
| 103 #define jinit_read_targa jIRdTarga |
| 104 #define jinit_write_targa jIWrTarga |
| 105 #define read_quant_tables RdQTables |
| 106 #define read_scan_script RdScnScript |
| 107 #define set_quant_slots SetQSlots |
| 108 #define set_sample_factors SetSFacts |
| 109 #define read_color_map RdCMap |
| 110 #define enable_signal_catcher EnSigCatcher |
| 111 #define start_progress_monitor StProgMon |
| 112 #define end_progress_monitor EnProgMon |
| 113 #define read_stdin RdStdin |
| 114 #define write_stdout WrStdout |
| 115 #endif /* NEED_SHORT_EXTERNAL_NAMES */ |
| 116 |
| 117 /* Module selection routines for I/O modules. */ |
| 118 |
| 119 EXTERN(cjpeg_source_ptr) jinit_read_bmp JPP((j_compress_ptr cinfo)); |
| 120 EXTERN(djpeg_dest_ptr) jinit_write_bmp JPP((j_decompress_ptr cinfo, |
| 121 boolean is_os2)); |
| 122 EXTERN(cjpeg_source_ptr) jinit_read_gif JPP((j_compress_ptr cinfo)); |
| 123 EXTERN(djpeg_dest_ptr) jinit_write_gif JPP((j_decompress_ptr cinfo)); |
| 124 EXTERN(cjpeg_source_ptr) jinit_read_ppm JPP((j_compress_ptr cinfo)); |
| 125 EXTERN(djpeg_dest_ptr) jinit_write_ppm JPP((j_decompress_ptr cinfo)); |
| 126 EXTERN(cjpeg_source_ptr) jinit_read_rle JPP((j_compress_ptr cinfo)); |
| 127 EXTERN(djpeg_dest_ptr) jinit_write_rle JPP((j_decompress_ptr cinfo)); |
| 128 EXTERN(cjpeg_source_ptr) jinit_read_targa JPP((j_compress_ptr cinfo)); |
| 129 EXTERN(djpeg_dest_ptr) jinit_write_targa JPP((j_decompress_ptr cinfo)); |
| 130 |
| 131 /* cjpeg support routines (in rdswitch.c) */ |
| 132 |
| 133 EXTERN(boolean) read_quant_tables JPP((j_compress_ptr cinfo, char * filename, |
| 134 int scale_factor, boolean force_baseline)); |
| 135 EXTERN(boolean) read_scan_script JPP((j_compress_ptr cinfo, char * filename)); |
| 136 EXTERN(boolean) set_quant_slots JPP((j_compress_ptr cinfo, char *arg)); |
| 137 EXTERN(boolean) set_sample_factors JPP((j_compress_ptr cinfo, char *arg)); |
| 138 |
| 139 /* djpeg support routines (in rdcolmap.c) */ |
| 140 |
| 141 EXTERN(void) read_color_map JPP((j_decompress_ptr cinfo, FILE * infile)); |
| 142 |
| 143 /* common support routines (in cdjpeg.c) */ |
| 144 |
| 145 EXTERN(void) enable_signal_catcher JPP((j_common_ptr cinfo)); |
| 146 EXTERN(void) start_progress_monitor JPP((j_common_ptr cinfo, |
| 147 cd_progress_ptr progress)); |
| 148 EXTERN(void) end_progress_monitor JPP((j_common_ptr cinfo)); |
| 149 EXTERN(boolean) keymatch JPP((char * arg, const char * keyword, int minchars)); |
| 150 EXTERN(FILE *) read_stdin JPP((void)); |
| 151 EXTERN(FILE *) write_stdout JPP((void)); |
| 152 |
| 153 /* miscellaneous useful macros */ |
| 154 |
| 155 #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ |
| 156 #define READ_BINARY "r" |
| 157 #define WRITE_BINARY "w" |
| 158 #else |
| 159 #ifdef VMS /* VMS is very nonstandard */ |
| 160 #define READ_BINARY "rb", "ctx=stm" |
| 161 #define WRITE_BINARY "wb", "ctx=stm" |
| 162 #else /* standard ANSI-compliant case */ |
| 163 #define READ_BINARY "rb" |
| 164 #define WRITE_BINARY "wb" |
| 165 #endif |
| 166 #endif |
| 167 |
| 168 #ifndef EXIT_FAILURE /* define exit() codes if not provided */ |
| 169 #define EXIT_FAILURE 1 |
| 170 #endif |
| 171 #ifndef EXIT_SUCCESS |
| 172 #ifdef VMS |
| 173 #define EXIT_SUCCESS 1 /* VMS is very nonstandard */ |
| 174 #else |
| 175 #define EXIT_SUCCESS 0 |
| 176 #endif |
| 177 #endif |
| 178 #ifndef EXIT_WARNING |
| 179 #ifdef VMS |
| 180 #define EXIT_WARNING 1 /* VMS is very nonstandard */ |
| 181 #else |
| 182 #define EXIT_WARNING 2 |
| 183 #endif |
| 184 #endif |
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