diff saitools/changeheader.c @ 0:5242703e91d3 tip

Initial checkin for AIM92 aimR8.2 (last updated May 1997).

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/saitools/changeheader.c	Fri May 20 15:19:45 2011 +0100
@@ -0,0 +1,285 @@
+/*
+    Copyright (c) Applied Psychology Unit, Medical Research Council. 1993
+    ===========================================================================
+
+    Permission to use, copy, modify, and distribute this software without fee 
+    is hereby granted for research purposes, provided that this copyright 
+    notice appears in all copies and in all supporting documentation, and that 
+    the software is not redistributed for any fee (except for a nominal 
+    shipping charge). Anyone wanting to incorporate all or part of this 
+    software in a commercial product must obtain a license from the Medical 
+    Research Council.
+
+    The MRC makes no representations about the suitability of this 
+    software for any purpose.  It is provided "as is" without express or 
+    implied warranty.
+ 
+    THE MRC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 
+    ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL 
+    THE A.P.U. BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES 
+    OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 
+    WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 
+    ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 
+    SOFTWARE.
+*/
+
+/* ------------------------------------------------------------------------*/
+
+/*  changeheader.c
+*  ----------------
+*
+* 'fakes' sai & nap headers.
+* 
+* M.Akeroyd. Summer 1993. Revised 1994.
+*/
+
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "tip.h"
+
+
+void reset_header_bytes();
+void change_framebytes();
+
+extern char progname[MAX_STRING_LENGTH];
+extern char header[MAX_LINES_HEADER][MAX_LINE_LENGTH];
+
+extern int verboseflag;
+extern int header_lines;        /* number of lines in header */
+
+
+/* .nap parameters */
+
+extern int no_frames;
+extern int frameheight;             /* number of channels */
+extern int framewidth_samples;      /* = 1 
+extern int frameshift_samples;      /* = 1 */ 
+extern int width_win;               /* pixels */
+extern int height_win;              /* pixels */
+extern long samplerate;             /* samples per sec */
+extern int mincf;                   /* Hz */
+extern int maxcf;                   /* Hz */
+
+extern int greyscaleflag;           /* ON or OFF */
+
+
+
+/* ------------------------------------------------------------------------*/
+
+
+
+void changeheader(int no_frames, int new_pwidth, int new_nwidth, int framewidth_samples_output)
+{
+    /* Reset various values:
+     *
+     * number of frames -> no_frames
+     * pwidth -> new_pwidth
+     * nwidth -> new_nwidth
+     * framewidth -> (pwidth+nwidth * samplerate). in msecs
+     * header_bytes
+     *
+     */
+
+  int new_header_length = 0;
+  int counter;
+  char tempstring[MAX_STRING_LENGTH];
+  char tempstring2[MAX_STRING_LENGTH];
+
+
+/*-------------------------------- */
+
+  for(counter=1; counter<=header_lines; counter++){
+
+    /* frames */
+    if (strncmp(header[counter], "frames=", 7) == 0 ) {
+      sprintf(header[counter], "frames=%d\n", no_frames);}
+
+    /* pwidth */
+    if (strncmp(header[counter], "pwidth_aid=", 11) == 0 ) 
+      sprintf(header[counter], "pwidth_aid=%d\n", new_pwidth);
+
+    /* nwidth */
+    /* include a gratuitous minus */
+    if (strncmp(header[counter], "nwidth_aid=", 11) == 0 ) 
+      if (new_nwidth < 0) 
+	sprintf(header[counter], "nwidth_aid=%d\n", new_nwidth);
+      else
+	sprintf(header[counter], "nwidth_aid=-%d\n", new_nwidth);
+
+    /* framewidth */
+    if (strncmp(header[counter], "framewidth=", 11) == 0 ) 
+      sprintf(header[counter], "framewidth=%d\n", framewidth_samples_output);
+
+    /*view=landscape */
+    if (greyscaleflag == ON)
+      if (strncmp(header[counter], "view=landscape", 14) == 0 ) 
+	sprintf(header[counter], "view=greyscale\n");
+
+   }
+
+  /* reset framebytes */
+  change_framebytes();
+
+  /* reset header */
+  reset_header_bytes;
+
+}
+
+
+
+/* ------------------------------------------------------------------------*/
+
+
+void change_framebytes()
+{
+  /* This is seperate beacuse it depends on lots of things 
+   * framebytes -> frameheight * framewidth *2 (bytes), I hope.
+  */
+
+  int counter;
+  char *p_equal=" ";       /* pointer to where the '=' is in the headerline */
+  char tempstring[MAX_STRING_LENGTH];        
+  int local_frameheight = 0;
+  int local_framewidth = 0;
+  
+  /* find out the values */
+
+  for(counter=1; counter<=header_lines; counter++) {
+    if (strncmp(header[counter], "frameheight=", 12) == 0 ) {
+      p_equal = strchr(header[counter], '=');
+      local_frameheight = atoi(++p_equal); }
+    if (strncmp(header[counter], "framewidth=", 11) == 0 ) {
+      p_equal = strchr(header[counter], '=');
+      local_framewidth = atoi(++p_equal); }}
+
+  /* put in new value */
+
+  for(counter=1; counter<=header_lines; counter++){
+    if (strncmp(header[counter], "framebytes=", 11) == 0 ) 
+      sprintf(header[counter], "framebytes=%d\n", (local_framewidth * local_frameheight *2));
+  }      
+}
+
+
+
+/* ------------------------------------------------------------------------*/
+
+
+
+void reset_header_bytes()
+{
+  /* What this code does:
+   * 
+   * My latest attempt to get the "header_bytes" field to be set to the
+   * right number, well, one that AIM accepts.
+   *
+   * At the moment, it assumes 
+   * (1) all headers are an even number of bytes long
+   * (2) the field is 7 characters long 
+   * (3) header_bytes = total length of all strings in header
+                        + 2
+   *
+   */
+
+  int new_header_length = 0;
+  int counter;
+  char tempstring[MAX_STRING_LENGTH];
+  char tempstring2[MAX_STRING_LENGTH];
+
+  /* find out how many bytes there SHOULD be */
+  for(counter=0; counter<=header_lines; counter++) 
+    new_header_length = new_header_length + strlen(header[counter]);
+ 
+  /* If this is odd, change to even.*/
+  if ((new_header_length % 2) == 1) 
+    new_header_length ++;
+
+  /* add 2 to it */
+  new_header_length += 2;
+  
+  /* put lots of zeros on front */
+  sprintf(tempstring, "%d", new_header_length);
+
+  /* add enough zero's on front to make it 7 chars long. 
+   * Since this was the length of the input's field, I don't need to 
+   * worry about it changing the true length of the header */
+  
+  while (strlen(tempstring) != 7 ){
+    strcpy(tempstring2, "0");
+    strcat(tempstring2, tempstring);
+    strcpy(tempstring, tempstring2);}
+
+     
+  /* use this value to reset header_bytes */
+  sprintf(header[0], "header_bytes=%s\n", tempstring);
+
+}
+
+
+
+/* ------------------------------------------------------------------------*/
+
+
+
+void changeheader_B(int new_mincf, int new_maxcf, int new_channels)
+{
+    /* Reset various values:
+     *
+     * mincf == new_mincf
+     * maxcf == new_maxcf
+     * channels = framehieght == new_channels
+     *
+     * NB This assumes "channels=" and "frameheight=" are both set to the
+     * same value. I haven't yet seen a .sai in which they are 
+     * different, but I haven't looked too hard.
+     *
+     */
+
+  int new_header_length = 0;
+  int counter;
+  char tempstring[MAX_STRING_LENGTH];
+  char tempstring2[MAX_STRING_LENGTH];
+
+
+  for(counter=1; counter<=header_lines; counter++){
+
+    /* mincf */
+    if (strncmp(header[counter], "mincf_afb=", 10) == 0 ) {
+      sprintf(header[counter], "mincf_afb=%d\n", new_mincf);}
+
+    /* maxcf */
+    if (strncmp(header[counter], "maxcf_afb=", 10) == 0 ) {
+      sprintf(header[counter], "maxcf_afb=%d\n", new_maxcf);}
+
+    /* channels */
+    if (strncmp(header[counter], "channels_afb=", 12) == 0 ) {
+      sprintf(header[counter], "channels_afb=%d\n", new_channels);}
+
+    /* frameheight */
+    if (strncmp(header[counter], "frameheight=", 12) == 0 ) 
+      sprintf(header[counter], "frameheight=%d\n", new_channels);
+
+  }      
+
+  /* reset framebytes */
+  change_framebytes();
+
+  /* reset header */
+  reset_header_bytes;
+
+}
+
+
+/* The End */
+/* ------------------------------------------------------------------------*/
+
+
+
+
+
+
+
+
+