comparison src/libsndfile-1.0.27/tests/dwvw_test.c @ 40:1df64224f5ac

Current libsndfile source

+/*
+** Copyright (C) 2002-2014 Erik de Castro Lopo <[e-mail]>
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** 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.
+*/
+
+#include "sfconfig.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <sndfile.h>
+
+#include "utils.h"
+
+#define	BUFFER_SIZE		(10000)
+
+#ifndef		M_PI
+#define		M_PI		3.14159265358979323846264338
+#endif
+
+static	void	dwvw_test (const char *filename, int format, int bit_width) ;
+
+int
+main (void)
+{
+	dwvw_test ("dwvw12.raw", SF_FORMAT_RAW | SF_FORMAT_DWVW_12, 12) ;
+	dwvw_test ("dwvw16.raw", SF_FORMAT_RAW | SF_FORMAT_DWVW_16, 16) ;
+	dwvw_test ("dwvw24.raw", SF_FORMAT_RAW | SF_FORMAT_DWVW_24, 24) ;
+
+	return 0 ;
+} /* main */
+
+static void
+dwvw_test (const char *filename, int format, int bit_width)
+{	static	int		write_buf [BUFFER_SIZE] ;
+	static	int		read_buf [BUFFER_SIZE] ;
+
+	SNDFILE	*file ;
+	SF_INFO sfinfo ;
+	double 	value ;
+	int		k, bit_mask ;
+
+	srand (123456) ;
+
+	/* Only want to grab the top bit_width bits. */
+	bit_mask = arith_shift_left (-1, 32 - bit_width) ;
+
+	print_test_name ("dwvw_test", filename) ;
+
+	sf_info_setup (&sfinfo, format, 44100, 1) ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_TRUE, __LINE__) ;
+
+	/* Generate random.frames. */
+	for (k = 0 ; k < BUFFER_SIZE / 2 ; k++)
+	{	value = 0x7FFFFFFF * sin (123.0 / sfinfo.samplerate * 2 * k * M_PI) ;
+		write_buf [k] = bit_mask & lrint (value) ;
+		} ;
+
+	for ( ; k < BUFFER_SIZE ; k++)
+		write_buf [k] = bit_mask & (arith_shift_left (rand (), 11) ^ (rand () >> 11)) ;
+
+	sf_write_int (file, write_buf, BUFFER_SIZE) ;
+	sf_close (file) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_TRUE, __LINE__) ;
+
+	if ((k = sf_read_int (file, read_buf, BUFFER_SIZE)) != BUFFER_SIZE)
+	{	printf ("Error (line %d) : Only read %d/%d.frames.\n", __LINE__, k, BUFFER_SIZE) ;
+		exit (1) ;
+		}
+
+	for (k = 0 ; k < BUFFER_SIZE ; k++)
+	{	if (read_buf [k] != write_buf [k])
+		{	printf ("Error (line %d) : %d != %d at position %d/%d\n", __LINE__,
+				write_buf [k] >> (32 - bit_width), read_buf [k] >> (32 - bit_width),
+				k, BUFFER_SIZE) ;
+			oct_save_int (write_buf, read_buf, BUFFER_SIZE) ;
+			exit (1) ;
+			} ;
+		} ;
+
+	sf_close (file) ;
+
+	unlink (filename) ;
+	printf ("ok\n") ;
+
+	return ;
+} /* dwvw_test */
+