--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.3/spandsp-0.0.3/tests/time_scale_tests.c	Fri Jun 25 16:00:21 2010 +0200
@@ -0,0 +1,154 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * time_scale_tests.c
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2004 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: time_scale_tests.c,v 1.14 2006/11/19 14:07:27 steveu Exp $
+ */
+
+/*! \page time_scale_tests_page Time scaling tests
+\section time_scale_tests_page_sec_1 What does it do?
+These tests run a speech file through the time scaling routines.
+
+\section time_scale_tests_page_sec_2 How are the tests run?
+These tests process a speech file called pre_time_scale.wav. This file should contain
+8000 sample/second 16 bits/sample linear audio. The tests read this file, change the
+time scale of its contents, and write the resulting audio to post_time_scale.wav.
+This file also contains 8000 sample/second 16 bits/sample linear audio.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <string.h>
+#if defined(HAVE_TGMATH_H)
+#include <tgmath.h>
+#endif
+#if defined(HAVE_MATH_H)
+#include <math.h>
+#endif
+#include <audiofile.h>
+#include <tiffio.h>
+
+#include "spandsp.h"
+
+#define BLOCK_LEN       160
+
+#define IN_FILE_NAME    "../localtests/short_nb_voice.wav"
+#define OUT_FILE_NAME   "post_time_scaling.wav"
+
+int main(int argc, char *argv[])
+{
+    AFfilehandle inhandle;
+    AFfilehandle outhandle;
+    AFfilesetup filesetup;
+    int frames;
+    int new_frames;
+    int out_frames;
+    int count;
+    time_scale_t state;
+    float x;
+    float rate;
+    int16_t in[BLOCK_LEN];
+    int16_t out[5*BLOCK_LEN];
+    
+    if ((inhandle = afOpenFile(IN_FILE_NAME, "r", 0)) == AF_NULL_FILEHANDLE)
+    {
+        printf("    Cannot open wave file '%s'\n", IN_FILE_NAME);
+        exit(2);
+    }
+    if ((x = afGetFrameSize(inhandle, AF_DEFAULT_TRACK, 1)) != 2.0)
+    {
+        printf("    Unexpected frame size in wave file '%s'\n", IN_FILE_NAME);
+        exit(2);
+    }
+    if ((x = afGetRate(inhandle, AF_DEFAULT_TRACK)) != (float) SAMPLE_RATE)
+    {
+        printf("    Unexpected sample rate in wave file '%s'\n", IN_FILE_NAME);
+        exit(2);
+    }
+    if ((x = afGetChannels(inhandle, AF_DEFAULT_TRACK)) != 1.0)
+    {
+        printf("    Unexpected number of channels in wave file '%s'\n", IN_FILE_NAME);
+        exit(2);
+    }
+
+    if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP)
+    {
+        fprintf(stderr, "    Failed to create file setup\n");
+        exit(2);
+    }
+    afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
+    afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
+    afInitFileFormat(filesetup, AF_FILE_WAVE);
+    afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
+    if ((outhandle = afOpenFile(OUT_FILE_NAME, "w", filesetup)) == AF_NULL_FILEHANDLE)
+    {
+        fprintf(stderr, "    Cannot create wave file '%s'\n", OUT_FILE_NAME);
+        exit(2);
+    }
+
+    rate = 1.8;
+
+    time_scale_init(&state, rate);
+    count = 0;
+    while ((frames = afReadFrames(inhandle, AF_DEFAULT_TRACK, in, BLOCK_LEN)))
+    {
+        new_frames = time_scale(&state, out, in, frames);
+        out_frames = afWriteFrames(outhandle, AF_DEFAULT_TRACK, out, new_frames);
+        if (out_frames != new_frames)
+        {
+            fprintf(stderr, "    Error writing wave file\n");
+            exit(2);
+        }
+        if (++count > 100)
+        {
+            if (rate > 0.5)
+            {
+                rate -= 0.1;
+                if (rate >= 0.99  &&  rate <= 1.01)
+                    rate -= 0.1;
+                printf("Rate is %f\n", rate);
+                time_scale_init(&state, rate);
+            }
+            count = 0;
+        }
+    }
+    if (afCloseFile(inhandle) != 0)
+    {
+        printf("    Cannot close wave file '%s'\n", IN_FILE_NAME);
+        exit(2);
+    }
+    if (afCloseFile(outhandle) != 0)
+    {
+        printf("    Cannot close wave file '%s'\n", OUT_FILE_NAME);
+        exit(2);
+    }
+    afFreeFileSetup(filesetup);
+    return 0;
+}
+/*- End of function --------------------------------------------------------*/
+/*- End of file ------------------------------------------------------------*/