1 /* 2 * cdjpeg.h 3 * 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 7 * to libjpeg-turbo. 8 * For conditions of distribution and use, see the accompanying README.ijg 9 * file. 10 * 11 * This file contains common declarations for the sample applications 12 * cjpeg and djpeg. It is NOT used by the core JPEG library. 13 */ 14 15 #define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */ 16 #define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */ 17 #include "jinclude.h" 18 #include "jpeglib.h" 19 #include "jerror.h" /* get library error codes too */ 20 #include "cderror.h" /* get application-specific error codes */ 21 22 23 /* 24 * Object interface for cjpeg's source file decoding modules 25 */ 26 27 typedef struct cjpeg_source_struct *cjpeg_source_ptr; 28 29 struct cjpeg_source_struct { 30 void (*start_input) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo); 31 JDIMENSION (*get_pixel_rows) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo); 32 void (*finish_input) (j_compress_ptr cinfo, 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 void (*start_output) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo); 52 /* Emit the specified number of pixel rows from the buffer. */ 53 void (*put_pixel_rows) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo, 54 JDIMENSION rows_supplied); 55 /* Finish up at the end of the image. */ 56 void (*finish_output) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo); 57 58 /* Target file spec; filled in by djpeg.c after object is created. */ 59 FILE *output_file; 60 61 /* Output pixel-row buffer. Created by module init or start_output. 62 * Width is cinfo->output_width * cinfo->output_components; 63 * height is buffer_height. 64 */ 65 JSAMPARRAY buffer; 66 JDIMENSION buffer_height; 67 }; 68 69 70 /* 71 * cjpeg/djpeg may need to perform extra passes to convert to or from 72 * the source/destination file format. The JPEG library does not know 73 * about these passes, but we'd like them to be counted by the progress 74 * monitor. We use an expanded progress monitor object to hold the 75 * additional pass count. 76 */ 77 78 struct cdjpeg_progress_mgr { 79 struct jpeg_progress_mgr pub; /* fields known to JPEG library */ 80 int completed_extra_passes; /* extra passes completed */ 81 int total_extra_passes; /* total extra */ 82 /* last printed percentage stored here to avoid multiple printouts */ 83 int percent_done; 84 }; 85 86 typedef struct cdjpeg_progress_mgr *cd_progress_ptr; 87 88 89 /* Module selection routines for I/O modules. */ 90 91 EXTERN(cjpeg_source_ptr) jinit_read_bmp (j_compress_ptr cinfo); 92 EXTERN(djpeg_dest_ptr) jinit_write_bmp (j_decompress_ptr cinfo, 93 boolean is_os2); 94 EXTERN(cjpeg_source_ptr) jinit_read_gif (j_compress_ptr cinfo); 95 EXTERN(djpeg_dest_ptr) jinit_write_gif (j_decompress_ptr cinfo); 96 EXTERN(cjpeg_source_ptr) jinit_read_ppm (j_compress_ptr cinfo); 97 EXTERN(djpeg_dest_ptr) jinit_write_ppm (j_decompress_ptr cinfo); 98 EXTERN(cjpeg_source_ptr) jinit_read_rle (j_compress_ptr cinfo); 99 EXTERN(djpeg_dest_ptr) jinit_write_rle (j_decompress_ptr cinfo); 100 EXTERN(cjpeg_source_ptr) jinit_read_targa (j_compress_ptr cinfo); 101 EXTERN(djpeg_dest_ptr) jinit_write_targa (j_decompress_ptr cinfo); 102 103 /* cjpeg support routines (in rdswitch.c) */ 104 105 EXTERN(boolean) read_quant_tables (j_compress_ptr cinfo, char *filename, 106 boolean force_baseline); 107 EXTERN(boolean) read_scan_script (j_compress_ptr cinfo, char *filename); 108 EXTERN(boolean) set_quality_ratings (j_compress_ptr cinfo, char *arg, 109 boolean force_baseline); 110 EXTERN(boolean) set_quant_slots (j_compress_ptr cinfo, char *arg); 111 EXTERN(boolean) set_sample_factors (j_compress_ptr cinfo, char *arg); 112 113 /* djpeg support routines (in rdcolmap.c) */ 114 115 EXTERN(void) read_color_map (j_decompress_ptr cinfo, FILE *infile); 116 117 /* common support routines (in cdjpeg.c) */ 118 119 EXTERN(void) enable_signal_catcher (j_common_ptr cinfo); 120 EXTERN(void) start_progress_monitor (j_common_ptr cinfo, 121 cd_progress_ptr progress); 122 EXTERN(void) end_progress_monitor (j_common_ptr cinfo); 123 EXTERN(boolean) keymatch (char *arg, const char *keyword, int minchars); 124 EXTERN(FILE *) read_stdin (void); 125 EXTERN(FILE *) write_stdout (void); 126 127 /* miscellaneous useful macros */ 128 129 #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ 130 #define READ_BINARY "r" 131 #define WRITE_BINARY "w" 132 #else 133 #define READ_BINARY "rb" 134 #define WRITE_BINARY "wb" 135 #endif 136 137 #ifndef EXIT_FAILURE /* define exit() codes if not provided */ 138 #define EXIT_FAILURE 1 139 #endif 140 #ifndef EXIT_SUCCESS 141 #define EXIT_SUCCESS 0 142 #endif 143 #ifndef EXIT_WARNING 144 #define EXIT_WARNING 2 145 #endif 146