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/*
* cdjpeg.h * * Copyright (C) 1994-1997, 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 contains common declarations for the sample applications * cjpeg and djpeg. It is NOT used by the core JPEG library. */
#define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */
#define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */
#include "jinclude.h"
#include "jpeglib.h"
#include "jerror.h" /* get library error codes too */
#include "cderror.h" /* get application-specific error codes */
/*
* Object interface for cjpeg's source file decoding modules */
typedef struct cjpeg_source_struct * cjpeg_source_ptr;
struct cjpeg_source_struct { JMETHOD(void, start_input, (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)); JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)); JMETHOD(void, finish_input, (j_compress_ptr cinfo, cjpeg_source_ptr sinfo));
FILE *input_file;
JSAMPARRAY buffer; JDIMENSION buffer_height;};
/*
* Object interface for djpeg's output file encoding modules */
typedef struct djpeg_dest_struct * djpeg_dest_ptr;
struct djpeg_dest_struct { /* start_output is called after jpeg_start_decompress finishes.
* The color map will be ready at this time, if one is needed. */ JMETHOD(void, start_output, (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)); /* Emit the specified number of pixel rows from the buffer. */ JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo, JDIMENSION rows_supplied)); /* Finish up at the end of the image. */ JMETHOD(void, finish_output, (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo));
/* Target file spec; filled in by djpeg.c after object is created. */ FILE * output_file;
/* Output pixel-row buffer. Created by module init or start_output.
* Width is cinfo->output_width * cinfo->output_components; * height is buffer_height. */ JSAMPARRAY buffer; JDIMENSION buffer_height;};
/*
* cjpeg/djpeg may need to perform extra passes to convert to or from * the source/destination file format. The JPEG library does not know * about these passes, but we'd like them to be counted by the progress * monitor. We use an expanded progress monitor object to hold the * additional pass count. */
struct cdjpeg_progress_mgr { struct jpeg_progress_mgr pub; /* fields known to JPEG library */ int completed_extra_passes; /* extra passes completed */ int total_extra_passes; /* total extra */ /* last printed percentage stored here to avoid multiple printouts */ int percent_done;};
typedef struct cdjpeg_progress_mgr * cd_progress_ptr;
/* Short forms of external names for systems with brain-damaged linkers. */
#ifdef NEED_SHORT_EXTERNAL_NAMES
#define jinit_read_bmp jIRdBMP
#define jinit_write_bmp jIWrBMP
#define jinit_read_gif jIRdGIF
#define jinit_write_gif jIWrGIF
#define jinit_read_ppm jIRdPPM
#define jinit_write_ppm jIWrPPM
#define jinit_read_rle jIRdRLE
#define jinit_write_rle jIWrRLE
#define jinit_read_targa jIRdTarga
#define jinit_write_targa jIWrTarga
#define read_quant_tables RdQTables
#define read_scan_script RdScnScript
#define set_quality_ratings SetQRates
#define set_quant_slots SetQSlots
#define set_sample_factors SetSFacts
#define read_color_map RdCMap
#define enable_signal_catcher EnSigCatcher
#define start_progress_monitor StProgMon
#define end_progress_monitor EnProgMon
#define read_stdin RdStdin
#define write_stdout WrStdout
#endif /* NEED_SHORT_EXTERNAL_NAMES */
/* Module selection routines for I/O modules. */
EXTERN(cjpeg_source_ptr) jinit_read_bmp JPP((j_compress_ptr cinfo));EXTERN(djpeg_dest_ptr) jinit_write_bmp JPP((j_decompress_ptr cinfo, boolean is_os2));EXTERN(cjpeg_source_ptr) jinit_read_gif JPP((j_compress_ptr cinfo));EXTERN(djpeg_dest_ptr) jinit_write_gif JPP((j_decompress_ptr cinfo));EXTERN(cjpeg_source_ptr) jinit_read_ppm JPP((j_compress_ptr cinfo));EXTERN(djpeg_dest_ptr) jinit_write_ppm JPP((j_decompress_ptr cinfo));EXTERN(cjpeg_source_ptr) jinit_read_rle JPP((j_compress_ptr cinfo));EXTERN(djpeg_dest_ptr) jinit_write_rle JPP((j_decompress_ptr cinfo));EXTERN(cjpeg_source_ptr) jinit_read_targa JPP((j_compress_ptr cinfo));EXTERN(djpeg_dest_ptr) jinit_write_targa JPP((j_decompress_ptr cinfo));
/* cjpeg support routines (in rdswitch.c) */
EXTERN(boolean) read_quant_tables JPP((j_compress_ptr cinfo, char * filename, boolean force_baseline));EXTERN(boolean) read_scan_script JPP((j_compress_ptr cinfo, char * filename));EXTERN(boolean) set_quality_ratings JPP((j_compress_ptr cinfo, char *arg, boolean force_baseline));EXTERN(boolean) set_quant_slots JPP((j_compress_ptr cinfo, char *arg));EXTERN(boolean) set_sample_factors JPP((j_compress_ptr cinfo, char *arg));
/* djpeg support routines (in rdcolmap.c) */
EXTERN(void) read_color_map JPP((j_decompress_ptr cinfo, FILE * infile));
/* common support routines (in cdjpeg.c) */
EXTERN(void) enable_signal_catcher JPP((j_common_ptr cinfo));EXTERN(void) start_progress_monitor JPP((j_common_ptr cinfo, cd_progress_ptr progress));EXTERN(void) end_progress_monitor JPP((j_common_ptr cinfo));EXTERN(boolean) keymatch JPP((char * arg, const char * keyword, int minchars));EXTERN(FILE *) read_stdin JPP((void));EXTERN(FILE *) write_stdout JPP((void));
/* miscellaneous useful macros */
#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
#define READ_BINARY "r"
#define WRITE_BINARY "w"
#else
#ifdef VMS /* VMS is very nonstandard */
#define READ_BINARY "rb", "ctx=stm"
#define WRITE_BINARY "wb", "ctx=stm"
#else /* standard ANSI-compliant case */
#define READ_BINARY "rb"
#define WRITE_BINARY "wb"
#endif
#endif
#ifndef EXIT_FAILURE /* define exit() codes if not provided */
#define EXIT_FAILURE 1
#endif
#ifndef EXIT_SUCCESS
#ifdef VMS
#define EXIT_SUCCESS 1 /* VMS is very nonstandard */
#else
#define EXIT_SUCCESS 0
#endif
#endif
#ifndef EXIT_WARNING
#ifdef VMS
#define EXIT_WARNING 1 /* VMS is very nonstandard */
#else
#define EXIT_WARNING 2
#endif
#endif
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