text: /*
  ** Copyright (C) 2002-2014 Erik de Castro Lopo <erikd@mega-nerd.com>
  **
  ** 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>
  #else
  #include "sf_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 */
  
  