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 * Modified 2019 by Guido Vollbeding. 7 * libjpeg-turbo Modifications: 8 * Copyright (C) 2017, 2019, 2021, D. R. Commander. 9 * For conditions of distribution and use, see the accompanying README.ijg 10 * file. 11 * 12 * This file contains common declarations for the sample applications 13 * cjpeg and djpeg. It is NOT used by the core JPEG library. 14 */ 15 16 #define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */ 17 #define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */ 18 #include "jinclude.h" 19 #include "jpeglib.h" 20 #include "jerror.h" /* get library error codes too */ 21 #include "cderror.h" /* get application-specific error codes */ 22 23 24 /* 25 * Object interface for cjpeg's source file decoding modules 26 */ 27 28 typedef struct cjpeg_source_struct *cjpeg_source_ptr; 29 30 struct cjpeg_source_struct { 31 void (*start_input) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo); 32 JDIMENSION (*get_pixel_rows) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo); 33 void (*finish_input) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo); 34 35 FILE *input_file; 36 37 JSAMPARRAY buffer; 38 JDIMENSION buffer_height; 39 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 40 JDIMENSION max_pixels; 41 #endif 42 }; 43 44 45 /* 46 * Object interface for djpeg's output file encoding modules 47 */ 48 49 typedef struct djpeg_dest_struct *djpeg_dest_ptr; 50 51 struct djpeg_dest_struct { 52 /* start_output is called after jpeg_start_decompress finishes. 53 * The color map will be ready at this time, if one is needed. 54 */ 55 void (*start_output) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo); 56 /* Emit the specified number of pixel rows from the buffer. */ 57 void (*put_pixel_rows) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo, 58 JDIMENSION rows_supplied); 59 /* Finish up at the end of the image. */ 60 void (*finish_output) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo); 61 /* Re-calculate buffer dimensions based on output dimensions (for use with 62 partial image decompression.) If this is NULL, then the output format 63 does not support partial image decompression (BMP, in particular, cannot 64 support partial decompression because it uses an inversion buffer to write 65 the image in bottom-up order.) */ 66 void (*calc_buffer_dimensions) (j_decompress_ptr cinfo, 67 djpeg_dest_ptr dinfo); 68 69 70 /* Target file spec; filled in by djpeg.c after object is created. */ 71 FILE *output_file; 72 73 /* Output pixel-row buffer. Created by module init or start_output. 74 * Width is cinfo->output_width * cinfo->output_components; 75 * height is buffer_height. 76 */ 77 JSAMPARRAY buffer; 78 JDIMENSION buffer_height; 79 }; 80 81 82 /* 83 * cjpeg/djpeg may need to perform extra passes to convert to or from 84 * the source/destination file format. The JPEG library does not know 85 * about these passes, but we'd like them to be counted by the progress 86 * monitor. We use an expanded progress monitor object to hold the 87 * additional pass count. 88 */ 89 90 struct cdjpeg_progress_mgr { 91 struct jpeg_progress_mgr pub; /* fields known to JPEG library */ 92 int completed_extra_passes; /* extra passes completed */ 93 int total_extra_passes; /* total extra */ 94 JDIMENSION max_scans; /* abort if the number of scans exceeds this 95 value and the value is non-zero */ 96 boolean report; /* whether or not to report progress */ 97 /* last printed percentage stored here to avoid multiple printouts */ 98 int percent_done; 99 }; 100 101 typedef struct cdjpeg_progress_mgr *cd_progress_ptr; 102 103 104 /* Module selection routines for I/O modules. */ 105 106 EXTERN(cjpeg_source_ptr) jinit_read_bmp(j_compress_ptr cinfo, 107 boolean use_inversion_array); 108 EXTERN(djpeg_dest_ptr) jinit_write_bmp(j_decompress_ptr cinfo, boolean is_os2, 109 boolean use_inversion_array); 110 EXTERN(cjpeg_source_ptr) jinit_read_gif(j_compress_ptr cinfo); 111 EXTERN(djpeg_dest_ptr) jinit_write_gif(j_decompress_ptr cinfo, boolean is_lzw); 112 EXTERN(cjpeg_source_ptr) jinit_read_ppm(j_compress_ptr cinfo); 113 EXTERN(djpeg_dest_ptr) jinit_write_ppm(j_decompress_ptr cinfo); 114 EXTERN(cjpeg_source_ptr) jinit_read_targa(j_compress_ptr cinfo); 115 EXTERN(djpeg_dest_ptr) jinit_write_targa(j_decompress_ptr cinfo); 116 117 /* cjpeg support routines (in rdswitch.c) */ 118 119 EXTERN(boolean) read_quant_tables(j_compress_ptr cinfo, char *filename, 120 boolean force_baseline); 121 EXTERN(boolean) read_scan_script(j_compress_ptr cinfo, char *filename); 122 EXTERN(boolean) set_quality_ratings(j_compress_ptr cinfo, char *arg, 123 boolean force_baseline); 124 EXTERN(boolean) set_quant_slots(j_compress_ptr cinfo, char *arg); 125 EXTERN(boolean) set_sample_factors(j_compress_ptr cinfo, char *arg); 126 127 /* djpeg support routines (in rdcolmap.c) */ 128 129 EXTERN(void) read_color_map(j_decompress_ptr cinfo, FILE *infile); 130 131 /* common support routines (in cdjpeg.c) */ 132 133 EXTERN(void) start_progress_monitor(j_common_ptr cinfo, 134 cd_progress_ptr progress); 135 EXTERN(void) end_progress_monitor(j_common_ptr cinfo); 136 EXTERN(boolean) keymatch(char *arg, const char *keyword, int minchars); 137 EXTERN(FILE *) read_stdin(void); 138 EXTERN(FILE *) write_stdout(void); 139 140 /* miscellaneous useful macros */ 141 142 #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ 143 #define READ_BINARY "r" 144 #define WRITE_BINARY "w" 145 #else 146 #define READ_BINARY "rb" 147 #define WRITE_BINARY "wb" 148 #endif 149 150 #ifndef EXIT_FAILURE /* define exit() codes if not provided */ 151 #define EXIT_FAILURE 1 152 #endif 153 #ifndef EXIT_SUCCESS 154 #define EXIT_SUCCESS 0 155 #endif 156 #ifndef EXIT_WARNING 157 #define EXIT_WARNING 2 158 #endif 159 160 #define IsExtRGB(cs) \ 161 (cs == JCS_RGB || (cs >= JCS_EXT_RGB && cs <= JCS_EXT_ARGB)) 162