--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.6pre17/tests/dtmf_tx_tests.c	Fri Jun 25 15:50:58 2010 +0200
@@ -0,0 +1,229 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * dtmf_tx_tests.c - Test the DTMF generator.
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2003 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: dtmf_tx_tests.c,v 1.23 2009/05/30 15:23:13 steveu Exp $
+ */
+
+/*! \file */
+
+/*! \page dtmf_tx_tests_page DTMF generation tests
+\section dtmf_tx_tests_page_sec_1 What does it do?
+???.
+
+\section dtmf_tx_tests_page_sec_2 How does it work?
+???.
+*/
+
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <time.h>
+#include <sndfile.h>
+
+//#if defined(WITH_SPANDSP_INTERNALS)
+#define SPANDSP_EXPOSE_INTERNAL_STRUCTURES
+//#endif
+
+#include "spandsp.h"
+#include "spandsp-sim.h"
+
+#define OUTPUT_FILE_NAME    "dtmf.wav"
+
+int main(int argc, char *argv[])
+{
+    dtmf_tx_state_t *gen;
+    int16_t amp[16384];
+    int len;
+    SNDFILE *outhandle;
+    int outframes;
+    int add_digits;
+
+    if ((outhandle = sf_open_telephony_write(OUTPUT_FILE_NAME, 1)) == NULL)
+    {
+        fprintf(stderr, "    Cannot open audio file '%s'\n", OUTPUT_FILE_NAME);
+        exit(2);
+    }
+
+    gen = dtmf_tx_init(NULL);
+    len = dtmf_tx(gen, amp, 16384);
+    printf("Generated %d samples\n", len);
+    outframes = sf_writef_short(outhandle, amp, len);
+    if (dtmf_tx_put(gen, "123", -1))
+    {
+        printf("Ooops\n");
+        exit(2);
+    }
+    len = dtmf_tx(gen, amp, 16384);
+    printf("Generated %d samples\n", len);
+    outframes = sf_writef_short(outhandle, amp, len);
+    if (dtmf_tx_put(gen, "456", -1))
+    {
+        printf("Ooops\n");
+        exit(2);
+    }
+    len = dtmf_tx(gen, amp, 160);
+    printf("Generated %d samples\n", len);
+    outframes = sf_writef_short(outhandle, amp, len);
+    if (dtmf_tx_put(gen, "789", -1))
+    {
+        printf("Ooops\n");
+        exit(2);
+    }
+    len = dtmf_tx(gen, amp, 160);
+    printf("Generated %d samples\n", len);
+    outframes = sf_writef_short(outhandle, amp, len);
+    if (dtmf_tx_put(gen, "*#", -1))
+    {
+        printf("Ooops\n");
+        exit(2);
+    }
+    len = dtmf_tx(gen, amp, 160);
+    printf("Generated %d samples\n", len);
+    outframes = sf_writef_short(outhandle, amp, len);
+    add_digits = 1;
+    do
+    {
+        len = dtmf_tx(gen, amp, 160);
+        printf("Generated %d samples\n", len);
+        if (len > 0)
+        {
+            outframes = sf_writef_short(outhandle, amp, len);
+        }
+        if (add_digits)
+        {
+            if (dtmf_tx_put(gen, "1234567890", -1))
+            {
+                printf("Digit buffer full\n");
+                add_digits = 0;
+            }
+        }
+    }
+    while (len > 0);
+
+    dtmf_tx_init(gen);
+    len = dtmf_tx(gen, amp, 16384);
+    printf("Generated %d samples\n", len);
+    outframes = sf_writef_short(outhandle, amp, len);
+    if (dtmf_tx_put(gen, "123", -1))
+    {
+        printf("Ooops\n");
+        exit(2);
+    }
+    len = dtmf_tx(gen, amp, 16384);
+    printf("Generated %d samples\n", len);
+    outframes = sf_writef_short(outhandle, amp, len);
+    if (dtmf_tx_put(gen, "456", -1))
+    {
+        printf("Ooops\n");
+        exit(2);
+    }
+    len = dtmf_tx(gen, amp, 160);
+    printf("Generated %d samples\n", len);
+    outframes = sf_writef_short(outhandle, amp, len);
+    if (dtmf_tx_put(gen, "789", -1))
+    {
+        printf("Ooops\n");
+        exit(2);
+    }
+    len = dtmf_tx(gen, amp, 160);
+    printf("Generated %d samples\n", len);
+    outframes = sf_writef_short(outhandle, amp, len);
+    if (dtmf_tx_put(gen, "0*#", -1))
+    {
+        printf("Ooops\n");
+        exit(2);
+    }
+    len = dtmf_tx(gen, amp, 160);
+    printf("Generated %d samples\n", len);
+    outframes = sf_writef_short(outhandle, amp, len);
+    if (dtmf_tx_put(gen, "ABCD", -1))
+    {
+        printf("Ooops\n");
+        exit(2);
+    }
+    len = dtmf_tx(gen, amp, 160);
+    printf("Generated %d samples\n", len);
+    outframes = sf_writef_short(outhandle, amp, len);
+
+    /* Try modifying the level and length of the digits */
+    printf("Try different levels and timing\n");
+    dtmf_tx_set_level(gen, -20, 5);
+    dtmf_tx_set_timing(gen, 100, 200);
+    if (dtmf_tx_put(gen, "123", -1))
+    {
+        printf("Ooops\n");
+        exit(2);
+    }
+    do
+    {
+        len = dtmf_tx(gen, amp, 160);
+        printf("Generated %d samples\n", len);
+        if (len > 0)
+            outframes = sf_writef_short(outhandle, amp, len);
+    }
+    while (len > 0);
+    printf("Restore normal levels and timing\n");
+    dtmf_tx_set_level(gen, -10, 0);
+    dtmf_tx_set_timing(gen, 50, 55);
+    if (dtmf_tx_put(gen, "A", -1))
+    {
+        printf("Ooops\n");
+        exit(2);
+    }
+
+    add_digits = TRUE;
+    do
+    {
+        len = dtmf_tx(gen, amp, 160);
+        printf("Generated %d samples\n", len);
+        if (len > 0)
+        {
+            outframes = sf_writef_short(outhandle, amp, len);
+        }
+        if (add_digits)
+        {
+            if (dtmf_tx_put(gen, "1234567890", -1))
+            {
+                printf("Digit buffer full\n");
+                add_digits = FALSE;
+            }
+        }
+    }
+    while (len > 0);
+
+    if (sf_close(outhandle) != 0)
+    {
+        fprintf(stderr, "    Cannot close audio file '%s'\n", OUTPUT_FILE_NAME);
+        exit(2);
+    }
+
+    return  0;
+}
+/*- End of function --------------------------------------------------------*/
+/*- End of file ------------------------------------------------------------*/