4 * This file was part of the Independent JPEG Group's software:
5 * Copyright (C) 1994-1997, Thomas G. Lane.
6 * It was modified by The libjpeg-turbo Project to include only code relevant
8 * For conditions of distribution and use, see the accompanying README file.
10 * This file contains common declarations for the sample applications
11 * cjpeg and djpeg. It is NOT used by the core JPEG library.
14 #define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */
15 #define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */
18 #include "jerror.h" /* get library error codes too */
19 #include "cderror.h" /* get application-specific error codes */
23 * Object interface for cjpeg's source file decoding modules
26 typedef struct cjpeg_source_struct * cjpeg_source_ptr;
28 struct cjpeg_source_struct {
29 void (*start_input) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo);
30 JDIMENSION (*get_pixel_rows) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo);
31 void (*finish_input) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo);
36 JDIMENSION buffer_height;
41 * Object interface for djpeg's output file encoding modules
44 typedef struct djpeg_dest_struct * djpeg_dest_ptr;
46 struct djpeg_dest_struct {
47 /* start_output is called after jpeg_start_decompress finishes.
48 * The color map will be ready at this time, if one is needed.
50 void (*start_output) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo);
51 /* Emit the specified number of pixel rows from the buffer. */
52 void (*put_pixel_rows) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
53 JDIMENSION rows_supplied);
54 /* Finish up at the end of the image. */
55 void (*finish_output) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo);
57 /* Target file spec; filled in by djpeg.c after object is created. */
60 /* Output pixel-row buffer. Created by module init or start_output.
61 * Width is cinfo->output_width * cinfo->output_components;
62 * height is buffer_height.
65 JDIMENSION buffer_height;
70 * cjpeg/djpeg may need to perform extra passes to convert to or from
71 * the source/destination file format. The JPEG library does not know
72 * about these passes, but we'd like them to be counted by the progress
73 * monitor. We use an expanded progress monitor object to hold the
74 * additional pass count.
77 struct cdjpeg_progress_mgr {
78 struct jpeg_progress_mgr pub; /* fields known to JPEG library */
79 int completed_extra_passes; /* extra passes completed */
80 int total_extra_passes; /* total extra */
81 /* last printed percentage stored here to avoid multiple printouts */
85 typedef struct cdjpeg_progress_mgr * cd_progress_ptr;
88 /* Module selection routines for I/O modules. */
90 EXTERN(cjpeg_source_ptr) jinit_read_bmp (j_compress_ptr cinfo);
91 EXTERN(djpeg_dest_ptr) jinit_write_bmp (j_decompress_ptr cinfo,
93 EXTERN(cjpeg_source_ptr) jinit_read_gif (j_compress_ptr cinfo);
94 EXTERN(djpeg_dest_ptr) jinit_write_gif (j_decompress_ptr cinfo);
95 EXTERN(cjpeg_source_ptr) jinit_read_ppm (j_compress_ptr cinfo);
96 EXTERN(djpeg_dest_ptr) jinit_write_ppm (j_decompress_ptr cinfo);
97 EXTERN(cjpeg_source_ptr) jinit_read_rle (j_compress_ptr cinfo);
98 EXTERN(djpeg_dest_ptr) jinit_write_rle (j_decompress_ptr cinfo);
99 EXTERN(cjpeg_source_ptr) jinit_read_targa (j_compress_ptr cinfo);
100 EXTERN(djpeg_dest_ptr) jinit_write_targa (j_decompress_ptr cinfo);
102 /* cjpeg support routines (in rdswitch.c) */
104 EXTERN(boolean) read_quant_tables (j_compress_ptr cinfo, char * filename,
105 boolean force_baseline);
106 EXTERN(boolean) read_scan_script (j_compress_ptr cinfo, char * filename);
107 EXTERN(boolean) set_quality_ratings (j_compress_ptr cinfo, char *arg,
108 boolean force_baseline);
109 EXTERN(boolean) set_quant_slots (j_compress_ptr cinfo, char *arg);
110 EXTERN(boolean) set_sample_factors (j_compress_ptr cinfo, char *arg);
112 /* djpeg support routines (in rdcolmap.c) */
114 EXTERN(void) read_color_map (j_decompress_ptr cinfo, FILE * infile);
116 /* common support routines (in cdjpeg.c) */
118 EXTERN(void) enable_signal_catcher (j_common_ptr cinfo);
119 EXTERN(void) start_progress_monitor (j_common_ptr cinfo,
120 cd_progress_ptr progress);
121 EXTERN(void) end_progress_monitor (j_common_ptr cinfo);
122 EXTERN(boolean) keymatch (char * arg, const char * keyword, int minchars);
123 EXTERN(FILE *) read_stdin (void);
124 EXTERN(FILE *) write_stdout (void);
126 /* miscellaneous useful macros */
128 #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
129 #define READ_BINARY "re"
130 #define WRITE_BINARY "we"
132 #define READ_BINARY "rbe"
133 #define WRITE_BINARY "wbe"
136 #ifndef EXIT_FAILURE /* define exit() codes if not provided */
137 #define EXIT_FAILURE 1
140 #define EXIT_SUCCESS 0
143 #define EXIT_WARNING 2