/*
** 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>
#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 */