875 lines
26 KiB
C
875 lines
26 KiB
C
/*
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* cjpeg.c
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*
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* Copyright (C) 1991-1995, Thomas G. Lane.
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* This file is part of the Independent JPEG Group's software.
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* For conditions of distribution and use, see the accompanying README file.
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*
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* This file contains a command-line user interface for the JPEG compressor.
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* It should work on any system with Unix- or MS-DOS-style command lines.
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*
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* Two different command line styles are permitted, depending on the
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* compile-time switch TWO_FILE_COMMANDLINE:
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* cjpeg [options] inputfile outputfile
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* cjpeg [options] [inputfile]
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* In the second style, output is always to standard output, which you'd
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* normally redirect to a file or pipe to some other program. Input is
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* either from a named file or from standard input (typically redirected).
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* The second style is convenient on Unix but is unhelpful on systems that
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* don't support pipes. Also, you MUST use the first style if your system
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* doesn't do binary I/O to stdin/stdout.
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* To simplify script writing, the "-outfile" switch is provided. The syntax
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* cjpeg [options] -outfile outputfile inputfile
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* works regardless of which command line style is used.
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*/
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#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
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#include "jversion.h" /* for version message */
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#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
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#ifdef __MWERKS__
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#include <SIOUX.h> /* Metrowerks declares it here */
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#endif
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#ifdef THINK_C
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#include <console.h> /* Think declares it here */
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#endif
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#endif
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#include <fcntl.h>
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#include <stdio.h>
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#include <direct.h>
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#include <io.h>
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#include <conio.h>
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/* Create the add-on message string table. */
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#define JMESSAGE(code,string) string ,
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static const char * const cdjpeg_message_table[] = {
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#include "cderror.h"
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NULL
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};
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/*
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* This routine determines what format the input file is,
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* and selects the appropriate input-reading module.
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*
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* To determine which family of input formats the file belongs to,
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* we may look only at the first byte of the file, since C does not
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* guarantee that more than one character can be pushed back with ungetc.
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* Looking at additional bytes would require one of these approaches:
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* 1) assume we can fseek() the input file (fails for piped input);
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* 2) assume we can push back more than one character (works in
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* some C implementations, but unportable);
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* 3) provide our own buffering (breaks input readers that want to use
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* stdio directly, such as the RLE library);
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* or 4) don't put back the data, and modify the input_init methods to assume
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* they start reading after the start of file (also breaks RLE library).
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* #1 is attractive for MS-DOS but is untenable on Unix.
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*
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* The most portable solution for file types that can't be identified by their
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* first byte is to make the user tell us what they are. This is also the
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* only approach for "raw" file types that contain only arbitrary values.
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* We presently apply this method for Targa files. Most of the time Targa
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* files start with 0x00, so we recognize that case. Potentially, however,
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* a Targa file could start with any byte value (byte 0 is the length of the
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* seldom-used ID field), so we provide a switch to force Targa input mode.
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*/
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static boolean is_targa; /* records user -targa switch */
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/*
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==============================================================
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DIRECTORY SCANNING
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==============================================================
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*/
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#define MAX_FOUND_FILES 0x1000
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#define MAX_QPATH 64 // max length of a quake game pathname
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#define MAX_OSPATH 128 // max length of a filesystem pathname
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#define MAX_NAME_LENGTH 32 // max length of a client name
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char *CopyString( const char *in ) {
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char *out;
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out = malloc (strlen(in)+1);
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strcpy (out, in);
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return out;
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}
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char **Sys_ListFiles( const char *directory, const char *extension, int *numfiles ) {
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char search[MAX_OSPATH];
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int nfiles;
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char **listCopy;
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char *list[MAX_FOUND_FILES];
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struct _finddata_t findinfo;
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int findhandle;
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int flag;
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int i;
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if ( !extension) {
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extension = "";
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}
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// passing a slash as extension will find directories
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if ( extension[0] == '/' && extension[1] == 0 ) {
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extension = "";
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flag = 0;
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} else {
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flag = _A_SUBDIR;
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}
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sprintf( search, "%s\\*%s", directory, extension );
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// search
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nfiles = 0;
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findhandle = _findfirst (search, &findinfo);
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if (findhandle == -1) {
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*numfiles = 0;
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return NULL;
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}
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do {
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if ( flag ^ ( findinfo.attrib & _A_SUBDIR ) ) {
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if ( nfiles == MAX_FOUND_FILES - 1 ) {
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break;
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}
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list[ nfiles ] = CopyString( findinfo.name );
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nfiles++;
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}
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} while ( _findnext (findhandle, &findinfo) != -1 );
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list[ nfiles ] = 0;
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_findclose (findhandle);
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// return a copy of the list
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*numfiles = nfiles;
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if ( !nfiles ) {
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return NULL;
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}
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listCopy = malloc( ( nfiles + 1 ) * sizeof( *listCopy ) );
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for ( i = 0 ; i < nfiles ; i++ ) {
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listCopy[i] = list[i];
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}
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listCopy[i] = NULL;
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return listCopy;
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}
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void Sys_FreeFileList( char **list ) {
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int i;
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if ( !list ) {
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return;
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}
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for ( i = 0 ; list[i] ; i++ ) {
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free( list[i] );
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}
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free( list );
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}
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LOCAL cjpeg_source_ptr
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select_file_type (j_compress_ptr cinfo, FILE * infile)
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{
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int c;
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if (is_targa) {
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#ifdef TARGA_SUPPORTED
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return jinit_read_targa(cinfo);
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#else
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ERREXIT(cinfo, JERR_TGA_NOTCOMP);
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#endif
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}
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if ((c = getc(infile)) == EOF)
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ERREXIT(cinfo, JERR_INPUT_EMPTY);
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if (ungetc(c, infile) == EOF)
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ERREXIT(cinfo, JERR_UNGETC_FAILED);
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switch (c) {
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#ifdef BMP_SUPPORTED
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case 'B':
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return jinit_read_bmp(cinfo);
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#endif
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#ifdef GIF_SUPPORTED
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case 'G':
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return jinit_read_gif(cinfo);
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#endif
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#ifdef PPM_SUPPORTED
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case 'P':
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return jinit_read_ppm(cinfo);
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#endif
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#ifdef RLE_SUPPORTED
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case 'R':
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return jinit_read_rle(cinfo);
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#endif
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#ifdef TARGA_SUPPORTED
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case 0x00:
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return jinit_read_targa(cinfo);
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#endif
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default:
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ERREXIT(cinfo, JERR_UNKNOWN_FORMAT);
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break;
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}
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return NULL; /* suppress compiler warnings */
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}
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/*
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* Argument-parsing code.
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* The switch parser is designed to be useful with DOS-style command line
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* syntax, ie, intermixed switches and file names, where only the switches
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* to the left of a given file name affect processing of that file.
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* The main program in this file doesn't actually use this capability...
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*/
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static const char * progname; /* program name for error messages */
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static char * outfilename; /* for -outfile switch */
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LOCAL void
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usage (void)
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/* complain about bad command line */
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{
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fprintf(stderr, "usage: %s [switches] ", progname);
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#ifdef TWO_FILE_COMMANDLINE
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fprintf(stderr, "inputfile outputfile\n");
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#else
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fprintf(stderr, "[inputfile]\n");
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#endif
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fprintf(stderr, "Switches (names may be abbreviated):\n");
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fprintf(stderr, " -quality N Compression quality (0..100; 5-95 is useful range)\n");
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fprintf(stderr, " -grayscale Create monochrome JPEG file\n");
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#ifdef ENTROPY_OPT_SUPPORTED
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fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
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#endif
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#ifdef C_PROGRESSIVE_SUPPORTED
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fprintf(stderr, " -progressive Create progressive JPEG file\n");
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#endif
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#ifdef TARGA_SUPPORTED
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fprintf(stderr, " -targa Input file is Targa format (usually not needed)\n");
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#endif
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fprintf(stderr, "Switches for advanced users:\n");
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#ifdef DCT_ISLOW_SUPPORTED
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fprintf(stderr, " -dct int Use integer DCT method%s\n",
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(JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
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#endif
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#ifdef DCT_IFAST_SUPPORTED
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fprintf(stderr, " -dct fast Use fast integer DCT (less accurate)%s\n",
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(JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
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#endif
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#ifdef DCT_FLOAT_SUPPORTED
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fprintf(stderr, " -dct float Use floating-point DCT method%s\n",
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(JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
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#endif
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fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
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#ifdef INPUT_SMOOTHING_SUPPORTED
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fprintf(stderr, " -smooth N Smooth dithered input (N=1..100 is strength)\n");
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#endif
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fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
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fprintf(stderr, " -outfile name Specify name for output file\n");
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fprintf(stderr, " -verbose or -debug Emit debug output\n");
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fprintf(stderr, "Switches for wizards:\n");
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#ifdef C_ARITH_CODING_SUPPORTED
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fprintf(stderr, " -arithmetic Use arithmetic coding\n");
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#endif
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fprintf(stderr, " -baseline Force baseline output\n");
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fprintf(stderr, " -qtables file Use quantization tables given in file\n");
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fprintf(stderr, " -qslots N[,...] Set component quantization tables\n");
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fprintf(stderr, " -sample HxV[,...] Set component sampling factors\n");
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#ifdef C_MULTISCAN_FILES_SUPPORTED
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fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
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#endif
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exit(EXIT_FAILURE);
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}
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LOCAL int
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parse_switches (j_compress_ptr cinfo, int argc, char **argv,
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int last_file_arg_seen, boolean for_real)
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/* Parse optional switches.
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* Returns argv[] index of first file-name argument (== argc if none).
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* Any file names with indexes <= last_file_arg_seen are ignored;
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* they have presumably been processed in a previous iteration.
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* (Pass 0 for last_file_arg_seen on the first or only iteration.)
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* for_real is FALSE on the first (dummy) pass; we may skip any expensive
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* processing.
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*/
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{
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int argn;
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char * arg;
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int quality; /* -quality parameter */
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int q_scale_factor; /* scaling percentage for -qtables */
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boolean force_baseline;
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boolean simple_progressive;
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char * qtablefile = NULL; /* saves -qtables filename if any */
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char * qslotsarg = NULL; /* saves -qslots parm if any */
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char * samplearg = NULL; /* saves -sample parm if any */
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char * scansarg = NULL; /* saves -scans parm if any */
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/* Set up default JPEG parameters. */
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/* Note that default -quality level need not, and does not,
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* match the default scaling for an explicit -qtables argument.
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*/
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quality = 95; /* default -quality value */
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q_scale_factor = 100; /* default to no scaling for -qtables */
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force_baseline = FALSE; /* by default, allow 16-bit quantizers */
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simple_progressive = FALSE;
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is_targa = FALSE;
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outfilename = NULL;
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cinfo->err->trace_level = 0;
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/* Scan command line options, adjust parameters */
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for (argn = 1; argn < argc; argn++) {
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arg = argv[argn];
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if (*arg != '-') {
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/* Not a switch, must be a file name argument */
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if (argn <= last_file_arg_seen) {
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outfilename = NULL; /* -outfile applies to just one input file */
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continue; /* ignore this name if previously processed */
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}
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break; /* else done parsing switches */
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}
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arg++; /* advance past switch marker character */
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if (keymatch(arg, "arithmetic", 1)) {
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/* Use arithmetic coding. */
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#ifdef C_ARITH_CODING_SUPPORTED
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cinfo->arith_code = TRUE;
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#else
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fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
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progname);
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exit(EXIT_FAILURE);
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#endif
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} else if (keymatch(arg, "baseline", 1)) {
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/* Force baseline output (8-bit quantizer values). */
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force_baseline = TRUE;
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} else if (keymatch(arg, "dct", 2)) {
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/* Select DCT algorithm. */
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (keymatch(argv[argn], "int", 1)) {
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cinfo->dct_method = JDCT_ISLOW;
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} else if (keymatch(argv[argn], "fast", 2)) {
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cinfo->dct_method = JDCT_IFAST;
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} else if (keymatch(argv[argn], "float", 2)) {
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cinfo->dct_method = JDCT_FLOAT;
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} else
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usage();
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} else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
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/* Enable debug printouts. */
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/* On first -d, print version identification */
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static boolean printed_version = FALSE;
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if (! printed_version) {
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fprintf(stderr, "Independent JPEG Group's CJPEG, version %s\n%s\n",
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JVERSION, JCOPYRIGHT);
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printed_version = TRUE;
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}
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cinfo->err->trace_level++;
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} else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
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/* Force a monochrome JPEG file to be generated. */
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jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
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} else if (keymatch(arg, "maxmemory", 3)) {
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/* Maximum memory in Kb (or Mb with 'm'). */
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long lval;
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char ch = 'x';
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
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usage();
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if (ch == 'm' || ch == 'M')
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lval *= 1000L;
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cinfo->mem->max_memory_to_use = lval * 1000L;
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} else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
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/* Enable entropy parm optimization. */
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#ifdef ENTROPY_OPT_SUPPORTED
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cinfo->optimize_coding = TRUE;
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#else
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fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
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progname);
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exit(EXIT_FAILURE);
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#endif
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} else if (keymatch(arg, "outfile", 4)) {
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/* Set output file name. */
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if (++argn >= argc) /* advance to next argument */
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usage();
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outfilename = argv[argn]; /* save it away for later use */
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} else if (keymatch(arg, "progressive", 1)) {
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/* Select simple progressive mode. */
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#ifdef C_PROGRESSIVE_SUPPORTED
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simple_progressive = TRUE;
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/* We must postpone execution until num_components is known. */
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#else
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fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
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progname);
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exit(EXIT_FAILURE);
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#endif
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} else if (keymatch(arg, "quality", 1)) {
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/* Quality factor (quantization table scaling factor). */
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (sscanf(argv[argn], "%d", &quality) != 1)
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usage();
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/* Change scale factor in case -qtables is present. */
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q_scale_factor = jpeg_quality_scaling(quality);
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} else if (keymatch(arg, "qslots", 2)) {
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/* Quantization table slot numbers. */
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if (++argn >= argc) /* advance to next argument */
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usage();
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qslotsarg = argv[argn];
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/* Must delay setting qslots until after we have processed any
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* colorspace-determining switches, since jpeg_set_colorspace sets
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* default quant table numbers.
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*/
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} else if (keymatch(arg, "qtables", 2)) {
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/* Quantization tables fetched from file. */
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if (++argn >= argc) /* advance to next argument */
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usage();
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qtablefile = argv[argn];
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/* We postpone actually reading the file in case -quality comes later. */
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} else if (keymatch(arg, "restart", 1)) {
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/* Restart interval in MCU rows (or in MCUs with 'b'). */
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long lval;
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char ch = 'x';
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
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usage();
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if (lval < 0 || lval > 65535L)
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usage();
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if (ch == 'b' || ch == 'B') {
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cinfo->restart_interval = (unsigned int) lval;
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cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
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} else {
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cinfo->restart_in_rows = (int) lval;
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/* restart_interval will be computed during startup */
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}
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} else if (keymatch(arg, "sample", 2)) {
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/* Set sampling factors. */
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if (++argn >= argc) /* advance to next argument */
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usage();
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samplearg = argv[argn];
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/* Must delay setting sample factors until after we have processed any
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* colorspace-determining switches, since jpeg_set_colorspace sets
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* default sampling factors.
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*/
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} else if (keymatch(arg, "scans", 2)) {
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/* Set scan script. */
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#ifdef C_MULTISCAN_FILES_SUPPORTED
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if (++argn >= argc) /* advance to next argument */
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usage();
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scansarg = argv[argn];
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/* We must postpone reading the file in case -progressive appears. */
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#else
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fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
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progname);
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exit(EXIT_FAILURE);
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#endif
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|
} else if (keymatch(arg, "smooth", 2)) {
|
|
/* Set input smoothing factor. */
|
|
int val;
|
|
|
|
if (++argn >= argc) /* advance to next argument */
|
|
usage();
|
|
if (sscanf(argv[argn], "%d", &val) != 1)
|
|
usage();
|
|
if (val < 0 || val > 100)
|
|
usage();
|
|
cinfo->smoothing_factor = val;
|
|
|
|
} else if (keymatch(arg, "targa", 1)) {
|
|
/* Input file is Targa format. */
|
|
is_targa = TRUE;
|
|
|
|
} else {
|
|
usage(); /* bogus switch */
|
|
}
|
|
}
|
|
|
|
/* Post-switch-scanning cleanup */
|
|
|
|
if (for_real) {
|
|
|
|
/* Set quantization tables for selected quality. */
|
|
/* Some or all may be overridden if -qtables is present. */
|
|
jpeg_set_quality(cinfo, quality, force_baseline);
|
|
|
|
if (qtablefile != NULL) /* process -qtables if it was present */
|
|
if (! read_quant_tables(cinfo, qtablefile,
|
|
q_scale_factor, force_baseline))
|
|
usage();
|
|
|
|
if (qslotsarg != NULL) /* process -qslots if it was present */
|
|
if (! set_quant_slots(cinfo, qslotsarg))
|
|
usage();
|
|
|
|
if (samplearg != NULL) /* process -sample if it was present */
|
|
if (! set_sample_factors(cinfo, samplearg))
|
|
usage();
|
|
|
|
#ifdef C_PROGRESSIVE_SUPPORTED
|
|
if (simple_progressive) /* process -progressive; -scans can override */
|
|
jpeg_simple_progression(cinfo);
|
|
#endif
|
|
|
|
#ifdef C_MULTISCAN_FILES_SUPPORTED
|
|
if (scansarg != NULL) /* process -scans if it was present */
|
|
if (! read_scan_script(cinfo, scansarg))
|
|
usage();
|
|
#endif
|
|
}
|
|
|
|
return argn; /* return index of next arg (file name) */
|
|
}
|
|
|
|
|
|
// returns length or 0 for error
|
|
//
|
|
long scFileSize(FILE *handle)
|
|
{
|
|
long curpos, length;
|
|
|
|
curpos = ftell(handle);
|
|
fseek(handle, 0L, SEEK_END);
|
|
length = ftell(handle);
|
|
fseek(handle, curpos, SEEK_SET);
|
|
if (length == -1)
|
|
return 0; // Paul tends to use 0 as error
|
|
|
|
return length;
|
|
}
|
|
|
|
|
|
// returns either file len or 0 for error...
|
|
//
|
|
long scGetFileLen(char *filename)
|
|
{
|
|
FILE *handle;
|
|
long len;
|
|
|
|
handle=fopen(filename,"rb");
|
|
|
|
if (!handle)
|
|
return 0;
|
|
|
|
len=scFileSize(handle);
|
|
fclose(handle); // NOT 'SAFECLOSE'!!
|
|
|
|
return len;
|
|
}
|
|
|
|
|
|
//int iNumberOf_FilesSkipped
|
|
int iNumberOf_FilesConverted = 0;
|
|
int iNumberOf_FilesScanned = 0;
|
|
int iSizeOf_JPGsWritten = 0;
|
|
int iSizeOf_TGAsDeleted = 0;
|
|
int gbNoTGADelete = 0; // bool
|
|
|
|
GLOBAL int qmain (int argc, char **argv);
|
|
|
|
void recurse(const char *dir)
|
|
{
|
|
char **sysFiles, **dirFiles, *args[5];
|
|
int numSysFiles, i, len, numdirs;
|
|
char altname[MAX_OSPATH];
|
|
char command1[MAX_OSPATH];
|
|
char command2[MAX_OSPATH];
|
|
|
|
dirFiles = Sys_ListFiles(dir, "/", &numdirs);
|
|
if (numdirs > 2)
|
|
{
|
|
for (i=2;i<numdirs;i++)
|
|
{
|
|
sprintf(altname, "%s\\%s", dir, dirFiles[i]);
|
|
// if (stricmp(altname,"q:\\send\\quake\\baseq3\\models\\players")) // dont recurse this dir
|
|
{
|
|
recurse(altname);
|
|
}
|
|
}
|
|
}
|
|
sprintf(command1, "-targa");
|
|
sprintf(command2, "-outfile");
|
|
sysFiles = Sys_ListFiles( dir, ".tga", &numSysFiles );
|
|
for(i=0; i<numSysFiles; i++) {
|
|
char tgain[MAX_OSPATH];
|
|
sprintf(tgain,"%s\\%s", dir, sysFiles[i]);
|
|
strcpy( altname, tgain );
|
|
len = strlen( altname );
|
|
altname[len-3] = 'j';
|
|
altname[len-2] = 'p';
|
|
altname[len-1] = 'g';
|
|
args[0] = "cjpeg";
|
|
args[1] = command2;
|
|
args[2] = altname;
|
|
args[3] = command1;
|
|
args[4] = tgain;
|
|
printf("%s", tgain);
|
|
len = qmain(5, args);
|
|
iNumberOf_FilesScanned++;
|
|
if (!len)
|
|
{
|
|
iNumberOf_FilesConverted++;
|
|
iSizeOf_JPGsWritten += scGetFileLen(altname);
|
|
iSizeOf_TGAsDeleted += scGetFileLen(tgain);
|
|
|
|
if (!gbNoTGADelete)
|
|
{
|
|
remove(tgain);
|
|
printf(" nuked!");
|
|
}
|
|
}
|
|
printf("\n");
|
|
}
|
|
Sys_FreeFileList( sysFiles );
|
|
Sys_FreeFileList( dirFiles );
|
|
}
|
|
|
|
GLOBAL int
|
|
main (int argc, char **argv)
|
|
{
|
|
char altname[MAX_OSPATH];
|
|
|
|
// scan for any args...
|
|
//
|
|
int iArgIndex = 1;
|
|
while (argc>=2)
|
|
{
|
|
if (stricmp(argv[iArgIndex],"nodelete")==0)
|
|
{
|
|
gbNoTGADelete = 1; // true
|
|
}
|
|
else
|
|
{
|
|
// anything else...
|
|
//
|
|
printf( "Usage: TGAJPG [arg, arg, arg...]\n\n"
|
|
"Where <arg> can be:\n\n"
|
|
"nodelete - don't delete TGA files after making JPGs\n"
|
|
"? - this help"
|
|
"\n\n"
|
|
);
|
|
exit(0);
|
|
}
|
|
argc--;
|
|
iArgIndex++;
|
|
}
|
|
|
|
|
|
|
|
getcwd(altname, MAX_OSPATH);
|
|
|
|
#define sDIR_ALLOWED_1 "q:\\send\\QUAKE"
|
|
#define sDIR_ALLOWED_2 "c:\\send\\QUAKE"
|
|
|
|
if (strnicmp(altname, sDIR_ALLOWED_1, strlen(sDIR_ALLOWED_1)) == 0 || strnicmp(altname, sDIR_ALLOWED_2, strlen(sDIR_ALLOWED_2)) == 0 )
|
|
{
|
|
recurse(altname);
|
|
|
|
printf("\n\nNumber of files scanned : %10d\n"
|
|
"Number of files converted: %10d\n"
|
|
"Total size of old TGAs : %10d (%dK) (%dM)\n"
|
|
"Total size of new JPGs : %10d (%dK) (%dM)\n"
|
|
"\n"
|
|
,
|
|
iNumberOf_FilesScanned,
|
|
iNumberOf_FilesConverted,
|
|
iSizeOf_TGAsDeleted, iSizeOf_TGAsDeleted/1024, (iSizeOf_TGAsDeleted/1024)/1024,
|
|
iSizeOf_JPGsWritten, iSizeOf_JPGsWritten/1024, (iSizeOf_JPGsWritten/1024)/1024
|
|
);
|
|
} else {
|
|
printf("Error: this can only be run from \"%s\" or \"%s\"!\n",sDIR_ALLOWED_1,sDIR_ALLOWED_2);
|
|
}
|
|
}
|
|
/*
|
|
* The main program.
|
|
*/
|
|
|
|
GLOBAL int qmain (int argc, char **argv)
|
|
{
|
|
struct jpeg_compress_struct cinfo;
|
|
struct jpeg_error_mgr jerr;
|
|
#ifdef PROGRESS_REPORT
|
|
struct cdjpeg_progress_mgr progress;
|
|
#endif
|
|
int file_index;
|
|
cjpeg_source_ptr src_mgr;
|
|
FILE * input_file;
|
|
FILE * output_file;
|
|
JDIMENSION num_scanlines;
|
|
|
|
/* On Mac, fetch a command line. */
|
|
#ifdef USE_CCOMMAND
|
|
argc = ccommand(&argv);
|
|
#endif
|
|
|
|
progname = argv[0];
|
|
if (progname == NULL || progname[0] == 0)
|
|
progname = "cjpeg"; /* in case C library doesn't provide it */
|
|
|
|
/* Initialize the JPEG compression object with default error handling. */
|
|
cinfo.err = jpeg_std_error(&jerr);
|
|
jpeg_create_compress(&cinfo);
|
|
/* Add some application-specific error messages (from cderror.h) */
|
|
jerr.addon_message_table = cdjpeg_message_table;
|
|
jerr.first_addon_message = JMSG_FIRSTADDONCODE;
|
|
jerr.last_addon_message = JMSG_LASTADDONCODE;
|
|
|
|
/* Now safe to enable signal catcher. */
|
|
#ifdef NEED_SIGNAL_CATCHER
|
|
enable_signal_catcher((j_common_ptr) &cinfo);
|
|
#endif
|
|
|
|
/* Initialize JPEG parameters.
|
|
* Much of this may be overridden later.
|
|
* In particular, we don't yet know the input file's color space,
|
|
* but we need to provide some value for jpeg_set_defaults() to work.
|
|
*/
|
|
|
|
cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
|
|
jpeg_set_defaults(&cinfo);
|
|
|
|
/* Scan command line to find file names.
|
|
* It is convenient to use just one switch-parsing routine, but the switch
|
|
* values read here are ignored; we will rescan the switches after opening
|
|
* the input file.
|
|
*/
|
|
|
|
file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
|
|
|
|
#ifdef TWO_FILE_COMMANDLINE
|
|
/* Must have either -outfile switch or explicit output file name */
|
|
if (outfilename == NULL) {
|
|
if (file_index != argc-2) {
|
|
fprintf(stderr, "%s: must name one input and one output file\n",
|
|
progname);
|
|
usage();
|
|
}
|
|
outfilename = argv[file_index+1];
|
|
} else {
|
|
if (file_index != argc-1) {
|
|
fprintf(stderr, "%s: must name one input and one output file\n",
|
|
progname);
|
|
usage();
|
|
}
|
|
}
|
|
#else
|
|
/* Unix style: expect zero or one file name */
|
|
if (file_index < argc-1) {
|
|
fprintf(stderr, "%s: only one input file\n", progname);
|
|
usage();
|
|
}
|
|
#endif /* TWO_FILE_COMMANDLINE */
|
|
|
|
/* Open the input file. */
|
|
if (file_index < argc) {
|
|
if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
|
|
fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
} else {
|
|
/* default input file is stdin */
|
|
input_file = read_stdin();
|
|
}
|
|
|
|
/* Open the output file. */
|
|
if (outfilename != NULL) {
|
|
if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
|
|
fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
} else {
|
|
/* default output file is stdout */
|
|
output_file = write_stdout();
|
|
}
|
|
|
|
#ifdef PROGRESS_REPORT
|
|
start_progress_monitor((j_common_ptr) &cinfo, &progress);
|
|
#endif
|
|
|
|
/* Figure out the input file format, and set up to read it. */
|
|
src_mgr = select_file_type(&cinfo, input_file);
|
|
src_mgr->input_file = input_file;
|
|
|
|
/* Read the input file header to obtain file size & colorspace. */
|
|
if ( (*src_mgr->start_input) (&cinfo, src_mgr) == 0) {
|
|
|
|
/* Now that we know input colorspace, fix colorspace-dependent defaults */
|
|
jpeg_default_colorspace(&cinfo);
|
|
|
|
/* Adjust default compression parameters by re-parsing the options */
|
|
file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
|
|
|
|
/* Specify data destination for compression */
|
|
jpeg_stdio_dest(&cinfo, output_file);
|
|
|
|
/* Start compressor */
|
|
jpeg_start_compress(&cinfo, TRUE);
|
|
|
|
/* Process data */
|
|
while (cinfo.next_scanline < cinfo.image_height) {
|
|
num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
|
|
(void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
|
|
}
|
|
|
|
/* Finish compression and release memory */
|
|
(*src_mgr->finish_input) (&cinfo, src_mgr);
|
|
jpeg_finish_compress(&cinfo);
|
|
jpeg_destroy_compress(&cinfo);
|
|
|
|
/* Close files, if we opened them */
|
|
if (input_file != stdin)
|
|
fclose(input_file);
|
|
if (output_file != stdout)
|
|
fclose(output_file);
|
|
|
|
#ifdef PROGRESS_REPORT
|
|
end_progress_monitor((j_common_ptr) &cinfo);
|
|
#endif
|
|
|
|
/* All done. */
|
|
} else {
|
|
/* Close files, if we opened them */
|
|
if (input_file != stdin)
|
|
fclose(input_file);
|
|
if (output_file != stdout)
|
|
fclose(output_file);
|
|
|
|
remove(outfilename);
|
|
return 1;
|
|
}
|
|
return 0; /* suppress no-return-value warnings */
|
|
}
|