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The Independent JPEG Group's JPEG software v6a

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This commit is contained in:
Thomas G. Lane
1996-02-07 00:00:00 +00:00
committed by DRC
parent bc79e0680a
commit 489583f516
101 changed files with 2063 additions and 1296 deletions
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28
rdswitch.c
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@@ -1,7 +1,7 @@
/*
* rdswitch.c
*
* Copyright (C) 1991-1995, Thomas G. Lane.
* Copyright (C) 1991-1996, 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.
*
@@ -17,16 +17,7 @@
#include <ctype.h> /* to declare isdigit(), isspace() */
/* Hack: get access to jpeg_zigzag_order[] table in jutils.c.
* Since it's declared in jpegint.h, normally can't see it from an application.
*/
#ifdef NEED_SHORT_EXTERNAL_NAMES
#define jpeg_zigzag_order jZIGTable
#endif
extern const int jpeg_zigzag_order[];
LOCAL int
LOCAL(int)
text_getc (FILE * file)
/* Read next char, skipping over any comments (# to end of line) */
/* A comment/newline sequence is returned as a newline */
@@ -43,7 +34,7 @@ text_getc (FILE * file)
}
LOCAL boolean
LOCAL(boolean)
read_text_integer (FILE * file, long * result, int * termchar)
/* Read an unsigned decimal integer from a file, store it in result */
/* Reads one trailing character after the integer; returns it in termchar */
@@ -78,7 +69,7 @@ read_text_integer (FILE * file, long * result, int * termchar)
}
GLOBAL boolean
GLOBAL(boolean)
read_quant_tables (j_compress_ptr cinfo, char * filename,
int scale_factor, boolean force_baseline)
/* Read a set of quantization tables from the specified file.
@@ -115,8 +106,7 @@ read_quant_tables (j_compress_ptr cinfo, char * filename,
fclose(fp);
return FALSE;
}
/* Convert from natural order in the file to zigzag table order. */
table[jpeg_zigzag_order[i]] = (unsigned int) val;
table[i] = (unsigned int) val;
}
jpeg_add_quant_table(cinfo, tblno, table, scale_factor, force_baseline);
tblno++;
@@ -135,7 +125,7 @@ read_quant_tables (j_compress_ptr cinfo, char * filename,
#ifdef C_MULTISCAN_FILES_SUPPORTED
LOCAL boolean
LOCAL(boolean)
read_scan_integer (FILE * file, long * result, int * termchar)
/* Variant of read_text_integer that always looks for a non-space termchar;
* this simplifies parsing of punctuation in scan scripts.
@@ -164,7 +154,7 @@ read_scan_integer (FILE * file, long * result, int * termchar)
}
GLOBAL boolean
GLOBAL(boolean)
read_scan_script (j_compress_ptr cinfo, char * filename)
/* Read a scan script from the specified text file.
* Each entry in the file defines one scan to be emitted.
@@ -272,7 +262,7 @@ bogus:
#endif /* C_MULTISCAN_FILES_SUPPORTED */
GLOBAL boolean
GLOBAL(boolean)
set_quant_slots (j_compress_ptr cinfo, char *arg)
/* Process a quantization-table-selectors parameter string, of the form
* N[,N,...]
@@ -307,7 +297,7 @@ set_quant_slots (j_compress_ptr cinfo, char *arg)
}
GLOBAL boolean
GLOBAL(boolean)
set_sample_factors (j_compress_ptr cinfo, char *arg)
/* Process a sample-factors parameter string, of the form
* HxV[,HxV,...]