169 lines
6.0 KiB
C
169 lines
6.0 KiB
C
/*
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* cdjpeg.h
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*
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* This file was part of the Independent JPEG Group's software:
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* Copyright (C) 1994-1997, Thomas G. Lane.
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* libjpeg-turbo Modifications:
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* Copyright (C) 2017, D. R. Commander.
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* mozjpeg Modifications:
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* Copyright (C) 2014, Mozilla Corporation.
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* For conditions of distribution and use, see the accompanying README.ijg file.
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*
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* This file contains common declarations for the sample applications
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* cjpeg and djpeg. It is NOT used by the core JPEG library.
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*/
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#define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */
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#define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */
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#include "jinclude.h"
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#include "jpeglib.h"
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#include "jerror.h" /* get library error codes too */
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#include "cderror.h" /* get application-specific error codes */
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#define JPEG_RAW_READER 0
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/*
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* Object interface for cjpeg's source file decoding modules
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*/
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typedef struct cjpeg_source_struct *cjpeg_source_ptr;
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struct cjpeg_source_struct {
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void (*start_input) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo);
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JDIMENSION (*get_pixel_rows) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo);
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void (*finish_input) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo);
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FILE *input_file;
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JSAMPARRAY buffer;
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JDIMENSION buffer_height;
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#if JPEG_RAW_READER
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// For reading JPEG
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JSAMPARRAY plane_pointer[4];
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#endif
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jpeg_saved_marker_ptr marker_list;
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};
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/*
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* Object interface for djpeg's output file encoding modules
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*/
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typedef struct djpeg_dest_struct *djpeg_dest_ptr;
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struct djpeg_dest_struct {
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/* start_output is called after jpeg_start_decompress finishes.
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* The color map will be ready at this time, if one is needed.
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*/
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void (*start_output) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo);
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/* Emit the specified number of pixel rows from the buffer. */
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void (*put_pixel_rows) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
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JDIMENSION rows_supplied);
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/* Finish up at the end of the image. */
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void (*finish_output) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo);
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/* Re-calculate buffer dimensions based on output dimensions (for use with
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partial image decompression.) If this is NULL, then the output format
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does not support partial image decompression (BMP and RLE, in particular,
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cannot support partial decompression because they use an inversion buffer
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to write the image in bottom-up order.) */
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void (*calc_buffer_dimensions) (j_decompress_ptr cinfo,
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djpeg_dest_ptr dinfo);
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/* Target file spec; filled in by djpeg.c after object is created. */
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FILE *output_file;
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/* Output pixel-row buffer. Created by module init or start_output.
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* Width is cinfo->output_width * cinfo->output_components;
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* height is buffer_height.
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*/
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JSAMPARRAY buffer;
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JDIMENSION buffer_height;
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};
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/*
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* cjpeg/djpeg may need to perform extra passes to convert to or from
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* the source/destination file format. The JPEG library does not know
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* about these passes, but we'd like them to be counted by the progress
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* monitor. We use an expanded progress monitor object to hold the
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* additional pass count.
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*/
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struct cdjpeg_progress_mgr {
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struct jpeg_progress_mgr pub; /* fields known to JPEG library */
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int completed_extra_passes; /* extra passes completed */
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int total_extra_passes; /* total extra */
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/* last printed percentage stored here to avoid multiple printouts */
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int percent_done;
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};
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typedef struct cdjpeg_progress_mgr *cd_progress_ptr;
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/* Module selection routines for I/O modules. */
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EXTERN(cjpeg_source_ptr) jinit_read_jpeg (j_compress_ptr cinfo);
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EXTERN(cjpeg_source_ptr) jinit_read_png (j_compress_ptr cinfo);
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EXTERN(cjpeg_source_ptr) jinit_read_bmp(j_compress_ptr cinfo,
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boolean use_inversion_array);
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EXTERN(djpeg_dest_ptr) jinit_write_bmp(j_decompress_ptr cinfo, boolean is_os2,
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boolean use_inversion_array);
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EXTERN(cjpeg_source_ptr) jinit_read_gif(j_compress_ptr cinfo);
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EXTERN(djpeg_dest_ptr) jinit_write_gif(j_decompress_ptr cinfo);
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EXTERN(cjpeg_source_ptr) jinit_read_ppm(j_compress_ptr cinfo);
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EXTERN(djpeg_dest_ptr) jinit_write_ppm(j_decompress_ptr cinfo);
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EXTERN(cjpeg_source_ptr) jinit_read_rle(j_compress_ptr cinfo);
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EXTERN(djpeg_dest_ptr) jinit_write_rle(j_decompress_ptr cinfo);
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EXTERN(cjpeg_source_ptr) jinit_read_targa(j_compress_ptr cinfo);
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EXTERN(djpeg_dest_ptr) jinit_write_targa(j_decompress_ptr cinfo);
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/* cjpeg support routines (in rdswitch.c) */
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EXTERN(boolean) read_quant_tables(j_compress_ptr cinfo, char *filename,
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boolean force_baseline);
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EXTERN(boolean) read_scan_script(j_compress_ptr cinfo, char *filename);
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EXTERN(boolean) set_quality_ratings(j_compress_ptr cinfo, char *arg,
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boolean force_baseline);
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EXTERN(boolean) set_quant_slots(j_compress_ptr cinfo, char *arg);
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EXTERN(boolean) set_sample_factors(j_compress_ptr cinfo, char *arg);
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/* djpeg support routines (in rdcolmap.c) */
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EXTERN(void) read_color_map(j_decompress_ptr cinfo, FILE *infile);
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/* common support routines (in cdjpeg.c) */
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EXTERN(void) enable_signal_catcher(j_common_ptr cinfo);
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EXTERN(void) start_progress_monitor(j_common_ptr cinfo,
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cd_progress_ptr progress);
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EXTERN(void) end_progress_monitor(j_common_ptr cinfo);
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EXTERN(boolean) keymatch(char *arg, const char *keyword, int minchars);
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EXTERN(FILE *) read_stdin(void);
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EXTERN(FILE *) write_stdout(void);
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/* miscellaneous useful macros */
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#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
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#define READ_BINARY "r"
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#define WRITE_BINARY "w"
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#else
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#define READ_BINARY "rb"
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#define WRITE_BINARY "wb"
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#endif
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#ifndef EXIT_FAILURE /* define exit() codes if not provided */
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#define EXIT_FAILURE 1
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#endif
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#ifndef EXIT_SUCCESS
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#define EXIT_SUCCESS 0
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#endif
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#ifndef EXIT_WARNING
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#define EXIT_WARNING 2
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#endif
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#define IsExtRGB(cs) \
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(cs == JCS_RGB || (cs >= JCS_EXT_RGB && cs <= JCS_EXT_ARGB))
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