diff tools/edwave.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/tools/edwave.c	Fri May 20 15:19:45 2011 +0100
@@ -0,0 +1,163 @@
+/*
+  edwave.c   Edit a given range of a wave in binary short (16-bit) numbers.
+  --------   Write results on the stdout.
+
+ The `range' option sets the start and duration of the process.
+ Its arguments are of the form: range=a-b (where start=a and duration=b-a+1)
+			    or: range=a   (where start=a and duration=1    )
+ The arguments can be in time units (ms, s) or samples (no units), and both
+ "min" (start of file) and "max" (end of file) are recognised.
+ Samples in a file are numbered 0,1,2,...,max.
+
+ The `operation' option sets the edit operation:
+    extract     = output the part of the input which is inclusively within
+		  the given range.
+    delete      = output the part of the input which is NOT inclusively
+		  within the given range.
+
+ These operation types can be given in unambiguous abreviated form.
+
+*/
+
+
+#include <stdio.h>
+#include <math.h>
+#include "options.h"
+#include "strmatch.h"
+#include "units.h"
+
+char applic[] = "Edit a given range of a wave." ;
+
+static char *helpstr, *debugstr, *sampstr,  *rangestr, *opstr, *typestr, *sizestr ;
+
+static Options option[] = {
+    {   "help"      ,   "off"       ,  &helpstr     ,   "help"                                  , DEBUG },
+    {   "debug"     ,   "off"       ,  &debugstr    ,   "debugging switch"                      , DEBUG },
+    {   "samplerate",   "20kHz"     ,  &sampstr     ,   "samplerate "                           , VAL   },
+    {   "range"     ,   "min-max"   ,  &rangestr    ,   "inclusive time range wrt start"        , VAL   },
+    {   "operation" ,   "extract"   ,  &opstr       ,   "edit operation: {extract, delete}"     , VAL   },
+    {   "type"      ,   "short"     ,  &typestr     ,   "datatype"                              , VAL     },
+    {   "size"      ,   "off"       ,  &sizestr     ,   "print wave size {s, ms}"               , VAL   },
+   ( char * ) 0 } ;
+
+
+int     samplerate ;
+int     type       ;    /* datatype index */
+
+
+main(argc, argv)
+int    argc;
+char **argv;
+{
+    FILE   *fp ;
+    int     i, n ;
+    int     a, b ;
+    float   y    ;
+
+    fp = openopts( option, argc, argv ) ;
+    if ( !isoff( helpstr ) )
+	helpopts( helpstr, argv[0], applic, option ) ;
+
+    samplerate  = to_Hz( sampstr, 0 ) ;
+
+    if ( ( type = typeindex( typestr ) ) < 0 ) {
+	fprintf( stderr, "edwave: bad type [%s]\n", typestr ) ;
+	exit( 1 ) ;
+    }
+
+    if ( range( rangestr, &a, &b, samplerate ) == 0 ) {
+	fprintf(stderr,"edwave: bad range \n" ) ;
+	exit( 1 ) ;
+    }
+    n = b-a+1 ;
+
+    if ( ison( debugstr ) ) {
+	fprintf( stderr, "range=%s  a=%d b=%d n=%d\n", rangestr,a,b,n ) ;
+	exit( 0 ) ;
+    }
+
+    if ( !isoff( sizestr ) ) {
+	for ( i = 0 ; readitem( &y, type, 1, fp )  ; i++ )
+	    ;
+	if ( isstr( sizestr, "s" ) )        printf( "%.3f\n",  (float)i/samplerate ) ;
+	else if ( isstr( sizestr, "ms" ) )  printf( "%.1f\n", ((float)i/samplerate)*1000. ) ;
+	else if ( ison( sizestr ) )         printf( "%d\n", i ) ; /* samples */
+	else {
+	    fprintf( stderr,"edwave: unknown units for size [%s]\n", sizestr ) ;
+	    exit( 1 ) ;
+	}
+    }
+
+    else if ( a == (-1) )       /* special case of range=max */
+	edmax( fp ) ;
+
+    else if ( iststr( opstr, "extract" ) ) {
+
+	if ( ( i = seektype( a, type, fp ) ) < a ) {
+	    fprintf( stderr,"edwave: eof after %d items \n", i ) ;
+	    exit( 1 ) ;
+	}
+	for ( i = 0 ; ( b < 0  ||  i < n ) && readitem( &y, type, 1, fp ) ; i++ )
+	    writeitem( &y, type, 1, stdout ) ;
+	if ( i < n && b >= 0 ) {
+	    fprintf( stderr,"edwave: eof after %d items \n", a+i ) ;
+	    exit( 1 ) ;
+	}
+    }
+
+    else if ( iststr( opstr, "delete" ) ) {
+	for ( i = 0 ; i < a && readitem( &y, type, 1, fp ) ; i++ )
+	    writeitem( &y, type, 1, stdout ) ;
+	if ( i < a ) {
+	    fprintf( stderr,"edwave: eof after %d items \n", i ) ;
+	    exit( 1 ) ;
+	}
+	if ( ( i = seektype( n, type, fp ) ) < n ) {
+	    fprintf( stderr,"edwave: eof after %d items \n", a+i ) ;
+	    exit( 1 ) ;
+	}
+	while ( readitem( &y, type, 1, fp ) )
+	    writeitem( &y, type, 1, stdout ) ;
+    }
+
+    else {
+	fprintf( stderr, "edwave: unknown operation [%s]\n", opstr ) ;
+	exit( 1 ) ;
+    }
+
+    fclose( fp ) ;
+}
+
+
+/*
+Special case of range=max or range=max-max
+*/
+
+edmax( fp )
+FILE *fp ;
+{
+    float x, y ;
+
+    if ( iststr( opstr, "extract" ) ) {
+	while ( readitem( &y, type, 1, fp ) )
+	    x = y ;
+	writeitem( &x, type, 1, stdout ) ;
+    }
+
+    else if ( iststr( opstr, "delete" ) ) {
+
+	if ( readitem( &x, type, 1, fp ) && readitem( &y, type, 1, fp ) ) {
+	    do {
+		writeitem( &x, type, 1, stdout ) ;
+		x = y ;
+	    } while ( readitem( &y, type, 1, fp ) ) ;
+	}
+    }
+
+    else {
+	fprintf( stderr, "edwave: unknown operation [%s]\n", opstr ) ;
+	exit( 1 ) ;
+    }
+
+    fclose( fp ) ;
+}