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/*
* sample_test.c - Sample audio conversion tests
*
* Tests every combination of audio format conversions (484 combinations).
* This is done by creating a double audio format triangle waveform and then
* for each transformation format pair, converting this waveform to the
* first format, then the second, then back to double again and comparing
* against the original.
*
* libInstPatch
* Copyright (C) 1999-2010 Joshua "Element" Green <jgreen@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; version 2.1
* of the License only.
*
* 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., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA or point your web browser to http://www.gnu.org.
*/
#include <libinstpatch/libinstpatch.h>
#define DEFAULT_AUDIO_SIZE (32 * 1024) /* default test waveform size in samples */
#define WAVEFORM_PERIOD 1684 /* something to exercise LSB bytes too */
#define MAX_DIFF_ALLOWED 0.016 /* maximum difference allowed */
#define WAVEFORM_QUARTER (WAVEFORM_PERIOD / 4)
/* all available sample format combinations */
int testformats[] = {
IPATCH_SAMPLE_8BIT,
IPATCH_SAMPLE_16BIT,
IPATCH_SAMPLE_24BIT,
IPATCH_SAMPLE_32BIT,
IPATCH_SAMPLE_FLOAT,
IPATCH_SAMPLE_DOUBLE,
IPATCH_SAMPLE_REAL24BIT,
IPATCH_SAMPLE_8BIT | IPATCH_SAMPLE_UNSIGNED,
IPATCH_SAMPLE_16BIT | IPATCH_SAMPLE_UNSIGNED,
IPATCH_SAMPLE_24BIT | IPATCH_SAMPLE_UNSIGNED,
IPATCH_SAMPLE_32BIT | IPATCH_SAMPLE_UNSIGNED,
IPATCH_SAMPLE_REAL24BIT | IPATCH_SAMPLE_UNSIGNED,
IPATCH_SAMPLE_16BIT | IPATCH_SAMPLE_BENDIAN,
IPATCH_SAMPLE_24BIT | IPATCH_SAMPLE_BENDIAN,
IPATCH_SAMPLE_32BIT | IPATCH_SAMPLE_BENDIAN,
IPATCH_SAMPLE_FLOAT | IPATCH_SAMPLE_BENDIAN,
IPATCH_SAMPLE_DOUBLE | IPATCH_SAMPLE_BENDIAN,
IPATCH_SAMPLE_REAL24BIT | IPATCH_SAMPLE_BENDIAN,
IPATCH_SAMPLE_16BIT | IPATCH_SAMPLE_UNSIGNED | IPATCH_SAMPLE_BENDIAN,
IPATCH_SAMPLE_24BIT | IPATCH_SAMPLE_UNSIGNED | IPATCH_SAMPLE_BENDIAN,
IPATCH_SAMPLE_32BIT | IPATCH_SAMPLE_UNSIGNED | IPATCH_SAMPLE_BENDIAN,
IPATCH_SAMPLE_REAL24BIT | IPATCH_SAMPLE_UNSIGNED | IPATCH_SAMPLE_BENDIAN
};
#define SAMPLE_FORMAT_COUNT G_N_ELEMENTS (testformats)
static int test_size = DEFAULT_AUDIO_SIZE;
static gboolean verbose = FALSE;
static GOptionEntry entries[] =
{
{ "size", 's', 0, G_OPTION_ARG_INT, &test_size, "Size of test waveform in samples (default=32768)", NULL },
{ "verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose, "Be verbose", NULL },
{ NULL }
};
int main (int argc, char *argv[])
{
IpatchSampleTransform *trans;
gpointer srctrans, desttrans;
double *dwave, *fintrans;
guint periodpos;
int srcform, destform;
int isrc, idest;
double d, maxdiff;
int i, maxindex, failcount = 0;
GError *error = NULL;
GOptionContext *context;
context = g_option_context_new ("- test libInstPatch sample format conversions");
g_option_context_add_main_entries (context, entries, "sample_test");
if (!g_option_context_parse (context, &argc, &argv, &error))
{
printf ("Failed to parse command line arguments: %s\n",
ipatch_gerror_message (error));
return 1;
}
g_option_context_free (context);
ipatch_init ();
dwave = g_new (double, test_size); /* allocate audio buffer (double format) */
srctrans = g_malloc (8 * test_size); /* source format transform buf */
desttrans = g_malloc (8 * test_size); /* destination format transform buf */
fintrans = g_malloc (8 * test_size); /* final transform buf */
/* create sample transform object and allocate its buffer */
trans = ipatch_sample_transform_new (0, 0, 0);
ipatch_sample_transform_alloc_size (trans, 32 * 1024);
/* generate triangle waveform */
for (i = 0; i < test_size; i++)
{
periodpos = i % WAVEFORM_PERIOD;
if (periodpos <= WAVEFORM_QUARTER)
dwave[i] = periodpos / (double)WAVEFORM_QUARTER;
else if (periodpos <= WAVEFORM_QUARTER * 3)
dwave[i] = -((periodpos - WAVEFORM_QUARTER) / (double)WAVEFORM_QUARTER - 1.0);
else dwave[i] = (periodpos - WAVEFORM_QUARTER * 3) / (double)WAVEFORM_QUARTER - 1.0;
}
/* Convert between all possible format pairs using the following steps:
* - Convert double to first format of format pair
* - Convert from first format to second format
* - Convert second format back to double
* - Calculate maximum sample difference between new double audio and original
*/
for (isrc = 0; isrc < SAMPLE_FORMAT_COUNT; isrc++)
{
srcform = testformats[isrc];
for (idest = 0; idest < SAMPLE_FORMAT_COUNT; idest++)
{
destform = testformats[idest];
/* convert double waveform to source format */
ipatch_sample_transform_set_formats (trans, IPATCH_SAMPLE_DOUBLE
| IPATCH_SAMPLE_ENDIAN_HOST, srcform,
IPATCH_SAMPLE_UNITY_CHANNEL_MAP);
ipatch_sample_transform_convert (trans, dwave, srctrans, test_size);
/* convert source format to destination format */
ipatch_sample_transform_set_formats (trans, srcform, destform,
IPATCH_SAMPLE_UNITY_CHANNEL_MAP);
ipatch_sample_transform_convert (trans, srctrans, desttrans, test_size);
/* convert destination format to final double output */
ipatch_sample_transform_set_formats (trans, destform, IPATCH_SAMPLE_DOUBLE
| IPATCH_SAMPLE_ENDIAN_HOST,
IPATCH_SAMPLE_UNITY_CHANNEL_MAP);
ipatch_sample_transform_convert (trans, desttrans, fintrans, test_size);
/* compare final waveform against original */
for (i = 0, maxdiff = 0.0, maxindex = 0; i < test_size; i++)
{
d = dwave[i] - fintrans[i];
if (d < 0.0) d = -d;
if (d > maxdiff)
{
maxdiff = d;
maxindex = i;
}
}
if (verbose)
printf ("Convert format %03x to %03x%s: maxdiff=%0.6f, sample=%d\n",
srcform, destform, maxdiff > MAX_DIFF_ALLOWED ? " FAILED" : "",
maxdiff, maxindex);
if (maxdiff > MAX_DIFF_ALLOWED)
{
if (!verbose)
printf ("Convert format %03x to %03x FAILED: maxdiff=%0.6f, sample=%d\n",
srcform, destform, maxdiff, maxindex);
failcount++;
}
}
}
ipatch_sample_transform_free (trans);
g_free (dwave);
g_free (srctrans);
g_free (desttrans);
g_free (fintrans);
if (failcount > 0)
{
printf ("%d of %d format conversions FAILED\n", failcount,
SAMPLE_FORMAT_COUNT * SAMPLE_FORMAT_COUNT);
return 1;
}
printf ("All %d sample format conversions PASSED\n",
SAMPLE_FORMAT_COUNT * SAMPLE_FORMAT_COUNT);
return 0;
}
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