--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.6pre17/tests/swept_tone_tests.c	Fri Jun 25 15:50:58 2010 +0200
@@ -0,0 +1,101 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * swept_tone_tests.c
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2009 Steve Underwood
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id: swept_tone_tests.c,v 1.2 2009/09/22 13:28:18 steveu Exp $
+ */
+
+/*! \file */
+
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <memory.h>
+#include <sndfile.h>
+
+#include "spandsp.h"
+#include "spandsp-sim.h"
+
+#define OUTPUT_FILE_NAME        "swept_tone.wav"
+
+#define BLOCK_LEN               160
+
+int main(int argc, char *argv[])
+{
+    int i;
+    int j;
+    int outframes;
+    int len;
+    SNDFILE *outhandle;
+    power_meter_t meter;
+    swept_tone_state_t *s;
+    int16_t buf[BLOCK_LEN];
+
+    power_meter_init(&meter, 10);
+
+    if ((outhandle = sf_open_telephony_write(OUTPUT_FILE_NAME, 1)) == NULL)
+    {
+        fprintf(stderr, "    Cannot create audio file '%s'\n", OUTPUT_FILE_NAME);
+        exit(2);
+    }
+
+    printf("Test with swept tone.\n");
+    s = swept_tone_init(NULL, 200.0f, 3900.0f, -10.0f, 60*SAMPLE_RATE, 1);
+    for (j = 0;  j < 60*SAMPLE_RATE;  j += BLOCK_LEN)
+    {
+        len = swept_tone(s, buf, BLOCK_LEN);
+        for (i = 0;  i < len;  i++)
+            power_meter_update(&meter, buf[i]);
+        outframes = sf_writef_short(outhandle, buf, len);
+        if (outframes != len)
+        {
+            fprintf(stderr, "    Error writing audio file\n");
+            exit(2);
+        }
+#if 0
+        printf("Current freq %.1fHz, Level is %fdBOv/%fdBm0\n",
+               swept_tone_current_frequency(s),
+               power_meter_current_dbov(&meter),
+               power_meter_current_dbm0(&meter));
+#else
+        printf("%.1f %f\n",
+               swept_tone_current_frequency(s),
+               power_meter_current_dbm0(&meter));
+#endif
+    }
+
+    if (sf_close(outhandle) != 0)
+    {
+        fprintf(stderr, "    Cannot close audio file '%s'\n", OUTPUT_FILE_NAME);
+        exit(2);
+    }
+
+    printf("Tests passed.\n");
+    return  0;
+}
+/*- End of function --------------------------------------------------------*/
+/*- End of file ------------------------------------------------------------*/