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-rwxr-xr-xjpeg/rdswitch.c365
1 files changed, 0 insertions, 365 deletions
diff --git a/jpeg/rdswitch.c b/jpeg/rdswitch.c
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--- a/jpeg/rdswitch.c
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@@ -1,365 +0,0 @@
-/*
- * rdswitch.c
- *
- * 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.
- *
- * This file contains routines to process some of cjpeg's more complicated
- * command-line switches. Switches processed here are:
- * -qtables file Read quantization tables from text file
- * -scans file Read scan script from text file
- * -quality N[,N,...] Set quality ratings
- * -qslots N[,N,...] Set component quantization table selectors
- * -sample HxV[,HxV,...] Set component sampling factors
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-#include <ctype.h> /* to declare isdigit(), isspace() */
-
-
-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 */
-{
- register int ch;
-
- ch = getc(file);
- if (ch == '#') {
- do {
- ch = getc(file);
- } while (ch != '\n' && ch != EOF);
- }
- return ch;
-}
-
-
-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 */
-{
- register int ch;
- register long val;
-
- /* Skip any leading whitespace, detect EOF */
- do {
- ch = text_getc(file);
- if (ch == EOF) {
- *termchar = ch;
- return FALSE;
- }
- } while (isspace(ch));
-
- if (! isdigit(ch)) {
- *termchar = ch;
- return FALSE;
- }
-
- val = ch - '0';
- while ((ch = text_getc(file)) != EOF) {
- if (! isdigit(ch))
- break;
- val *= 10;
- val += ch - '0';
- }
- *result = val;
- *termchar = ch;
- return TRUE;
-}
-
-
-GLOBAL(boolean)
-read_quant_tables (j_compress_ptr cinfo, char * filename, boolean force_baseline)
-/* Read a set of quantization tables from the specified file.
- * The file is plain ASCII text: decimal numbers with whitespace between.
- * Comments preceded by '#' may be included in the file.
- * There may be one to NUM_QUANT_TBLS tables in the file, each of 64 values.
- * The tables are implicitly numbered 0,1,etc.
- * NOTE: does not affect the qslots mapping, which will default to selecting
- * table 0 for luminance (or primary) components, 1 for chrominance components.
- * You must use -qslots if you want a different component->table mapping.
- */
-{
- FILE * fp;
- int tblno, i, termchar;
- long val;
- unsigned int table[DCTSIZE2];
-
- if ((fp = fopen(filename, "r")) == NULL) {
- fprintf(stderr, "Can't open table file %s\n", filename);
- return FALSE;
- }
- tblno = 0;
-
- while (read_text_integer(fp, &val, &termchar)) { /* read 1st element of table */
- if (tblno >= NUM_QUANT_TBLS) {
- fprintf(stderr, "Too many tables in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- table[0] = (unsigned int) val;
- for (i = 1; i < DCTSIZE2; i++) {
- if (! read_text_integer(fp, &val, &termchar)) {
- fprintf(stderr, "Invalid table data in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- table[i] = (unsigned int) val;
- }
- jpeg_add_quant_table(cinfo, tblno, table, cinfo->q_scale_factor[tblno],
- force_baseline);
- tblno++;
- }
-
- if (termchar != EOF) {
- fprintf(stderr, "Non-numeric data in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
-
- fclose(fp);
- return TRUE;
-}
-
-
-#ifdef C_MULTISCAN_FILES_SUPPORTED
-
-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.
- */
-{
- register int ch;
-
- if (! read_text_integer(file, result, termchar))
- return FALSE;
- ch = *termchar;
- while (ch != EOF && isspace(ch))
- ch = text_getc(file);
- if (isdigit(ch)) { /* oops, put it back */
- if (ungetc(ch, file) == EOF)
- return FALSE;
- ch = ' ';
- } else {
- /* Any separators other than ';' and ':' are ignored;
- * this allows user to insert commas, etc, if desired.
- */
- if (ch != EOF && ch != ';' && ch != ':')
- ch = ' ';
- }
- *termchar = ch;
- return TRUE;
-}
-
-
-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.
- * Entries are separated by semicolons ';'.
- * An entry contains one to four component indexes,
- * optionally followed by a colon ':' and four progressive-JPEG parameters.
- * The component indexes denote which component(s) are to be transmitted
- * in the current scan. The first component has index 0.
- * Sequential JPEG is used if the progressive-JPEG parameters are omitted.
- * The file is free format text: any whitespace may appear between numbers
- * and the ':' and ';' punctuation marks. Also, other punctuation (such
- * as commas or dashes) can be placed between numbers if desired.
- * Comments preceded by '#' may be included in the file.
- * Note: we do very little validity checking here;
- * jcmaster.c will validate the script parameters.
- */
-{
- FILE * fp;
- int scanno, ncomps, termchar;
- long val;
- jpeg_scan_info * scanptr;
-#define MAX_SCANS 100 /* quite arbitrary limit */
- jpeg_scan_info scans[MAX_SCANS];
-
- if ((fp = fopen(filename, "r")) == NULL) {
- fprintf(stderr, "Can't open scan definition file %s\n", filename);
- return FALSE;
- }
- scanptr = scans;
- scanno = 0;
-
- while (read_scan_integer(fp, &val, &termchar)) {
- if (scanno >= MAX_SCANS) {
- fprintf(stderr, "Too many scans defined in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- scanptr->component_index[0] = (int) val;
- ncomps = 1;
- while (termchar == ' ') {
- if (ncomps >= MAX_COMPS_IN_SCAN) {
- fprintf(stderr, "Too many components in one scan in file %s\n",
- filename);
- fclose(fp);
- return FALSE;
- }
- if (! read_scan_integer(fp, &val, &termchar))
- goto bogus;
- scanptr->component_index[ncomps] = (int) val;
- ncomps++;
- }
- scanptr->comps_in_scan = ncomps;
- if (termchar == ':') {
- if (! read_scan_integer(fp, &val, &termchar) || termchar != ' ')
- goto bogus;
- scanptr->Ss = (int) val;
- if (! read_scan_integer(fp, &val, &termchar) || termchar != ' ')
- goto bogus;
- scanptr->Se = (int) val;
- if (! read_scan_integer(fp, &val, &termchar) || termchar != ' ')
- goto bogus;
- scanptr->Ah = (int) val;
- if (! read_scan_integer(fp, &val, &termchar))
- goto bogus;
- scanptr->Al = (int) val;
- } else {
- /* set non-progressive parameters */
- scanptr->Ss = 0;
- scanptr->Se = DCTSIZE2-1;
- scanptr->Ah = 0;
- scanptr->Al = 0;
- }
- if (termchar != ';' && termchar != EOF) {
-bogus:
- fprintf(stderr, "Invalid scan entry format in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- scanptr++, scanno++;
- }
-
- if (termchar != EOF) {
- fprintf(stderr, "Non-numeric data in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
-
- if (scanno > 0) {
- /* Stash completed scan list in cinfo structure.
- * NOTE: for cjpeg's use, JPOOL_IMAGE is the right lifetime for this data,
- * but if you want to compress multiple images you'd want JPOOL_PERMANENT.
- */
- scanptr = (jpeg_scan_info *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- scanno * SIZEOF(jpeg_scan_info));
- MEMCOPY(scanptr, scans, scanno * SIZEOF(jpeg_scan_info));
- cinfo->scan_info = scanptr;
- cinfo->num_scans = scanno;
- }
-
- fclose(fp);
- return TRUE;
-}
-
-#endif /* C_MULTISCAN_FILES_SUPPORTED */
-
-
-GLOBAL(boolean)
-set_quality_ratings (j_compress_ptr cinfo, char *arg, boolean force_baseline)
-/* Process a quality-ratings parameter string, of the form
- * N[,N,...]
- * If there are more q-table slots than parameters, the last value is replicated.
- */
-{
- int val = 75; /* default value */
- int tblno;
- char ch;
-
- for (tblno = 0; tblno < NUM_QUANT_TBLS; tblno++) {
- if (*arg) {
- ch = ','; /* if not set by sscanf, will be ',' */
- if (sscanf(arg, "%d%c", &val, &ch) < 1)
- return FALSE;
- if (ch != ',') /* syntax check */
- return FALSE;
- /* Convert user 0-100 rating to percentage scaling */
- cinfo->q_scale_factor[tblno] = jpeg_quality_scaling(val);
- while (*arg && *arg++ != ',') /* advance to next segment of arg string */
- ;
- } else {
- /* reached end of parameter, set remaining factors to last value */
- cinfo->q_scale_factor[tblno] = jpeg_quality_scaling(val);
- }
- }
- jpeg_default_qtables(cinfo, force_baseline);
- return TRUE;
-}
-
-
-GLOBAL(boolean)
-set_quant_slots (j_compress_ptr cinfo, char *arg)
-/* Process a quantization-table-selectors parameter string, of the form
- * N[,N,...]
- * If there are more components than parameters, the last value is replicated.
- */
-{
- int val = 0; /* default table # */
- int ci;
- char ch;
-
- for (ci = 0; ci < MAX_COMPONENTS; ci++) {
- if (*arg) {
- ch = ','; /* if not set by sscanf, will be ',' */
- if (sscanf(arg, "%d%c", &val, &ch) < 1)
- return FALSE;
- if (ch != ',') /* syntax check */
- return FALSE;
- if (val < 0 || val >= NUM_QUANT_TBLS) {
- fprintf(stderr, "JPEG quantization tables are numbered 0..%d\n",
- NUM_QUANT_TBLS-1);
- return FALSE;
- }
- cinfo->comp_info[ci].quant_tbl_no = val;
- while (*arg && *arg++ != ',') /* advance to next segment of arg string */
- ;
- } else {
- /* reached end of parameter, set remaining components to last table */
- cinfo->comp_info[ci].quant_tbl_no = val;
- }
- }
- return TRUE;
-}
-
-
-GLOBAL(boolean)
-set_sample_factors (j_compress_ptr cinfo, char *arg)
-/* Process a sample-factors parameter string, of the form
- * HxV[,HxV,...]
- * If there are more components than parameters, "1x1" is assumed for the rest.
- */
-{
- int ci, val1, val2;
- char ch1, ch2;
-
- for (ci = 0; ci < MAX_COMPONENTS; ci++) {
- if (*arg) {
- ch2 = ','; /* if not set by sscanf, will be ',' */
- if (sscanf(arg, "%d%c%d%c", &val1, &ch1, &val2, &ch2) < 3)
- return FALSE;
- if ((ch1 != 'x' && ch1 != 'X') || ch2 != ',') /* syntax check */
- return FALSE;
- if (val1 <= 0 || val1 > 4 || val2 <= 0 || val2 > 4) {
- fprintf(stderr, "JPEG sampling factors must be 1..4\n");
- return FALSE;
- }
- cinfo->comp_info[ci].h_samp_factor = val1;
- cinfo->comp_info[ci].v_samp_factor = val2;
- while (*arg && *arg++ != ',') /* advance to next segment of arg string */
- ;
- } else {
- /* reached end of parameter, set remaining components to 1x1 sampling */
- cinfo->comp_info[ci].h_samp_factor = 1;
- cinfo->comp_info[ci].v_samp_factor = 1;
- }
- }
- return TRUE;
-}
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