Chris@40: /*
Chris@40: ** Copyright (C) 1999-2012 Erik de Castro Lopo <erikd@mega-nerd.com>
Chris@40: **
Chris@40: ** All rights reserved.
Chris@40: **
Chris@40: ** Redistribution and use in source and binary forms, with or without
Chris@40: ** modification, are permitted provided that the following conditions are
Chris@40: ** met:
Chris@40: **
Chris@40: **     * Redistributions of source code must retain the above copyright
Chris@40: **       notice, this list of conditions and the following disclaimer.
Chris@40: **     * Redistributions in binary form must reproduce the above copyright
Chris@40: **       notice, this list of conditions and the following disclaimer in
Chris@40: **       the documentation and/or other materials provided with the
Chris@40: **       distribution.
Chris@40: **     * Neither the author nor the names of any contributors may be used
Chris@40: **       to endorse or promote products derived from this software without
Chris@40: **       specific prior written permission.
Chris@40: **
Chris@40: ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Chris@40: ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
Chris@40: ** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
Chris@40: ** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
Chris@40: ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Chris@40: ** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
Chris@40: ** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
Chris@40: ** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
Chris@40: ** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
Chris@40: ** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
Chris@40: ** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Chris@40: */
Chris@40: 
Chris@40: #include	<stdio.h>
Chris@40: #include	<stdlib.h>
Chris@40: #include	<string.h>
Chris@40: #include	<math.h>
Chris@40: 
Chris@40: #include	<sndfile.h>
Chris@40: 
Chris@40: #ifndef		M_PI
Chris@40: #define		M_PI		3.14159265358979323846264338
Chris@40: #endif
Chris@40: 
Chris@40: #define		SAMPLE_RATE			44100
Chris@40: #define		SAMPLE_COUNT		(SAMPLE_RATE * 4)	/* 4 seconds */
Chris@40: #define		AMPLITUDE			(1.0 * 0x7F000000)
Chris@40: #define		LEFT_FREQ			(344.0 / SAMPLE_RATE)
Chris@40: #define		RIGHT_FREQ			(466.0 / SAMPLE_RATE)
Chris@40: 
Chris@40: int
Chris@40: main (void)
Chris@40: {	SNDFILE	*file ;
Chris@40: 	SF_INFO	sfinfo ;
Chris@40: 	int		k ;
Chris@40: 	int	*buffer ;
Chris@40: 
Chris@40: 	if (! (buffer = malloc (2 * SAMPLE_COUNT * sizeof (int))))
Chris@40: 	{	printf ("Malloc failed.\n") ;
Chris@40: 		exit (0) ;
Chris@40: 		} ;
Chris@40: 
Chris@40: 	memset (&sfinfo, 0, sizeof (sfinfo)) ;
Chris@40: 
Chris@40: 	sfinfo.samplerate	= SAMPLE_RATE ;
Chris@40: 	sfinfo.frames		= SAMPLE_COUNT ;
Chris@40: 	sfinfo.channels		= 2 ;
Chris@40: 	sfinfo.format		= (SF_FORMAT_WAV | SF_FORMAT_PCM_24) ;
Chris@40: 
Chris@40: 	if (! (file = sf_open ("sine.wav", SFM_WRITE, &sfinfo)))
Chris@40: 	{	printf ("Error : Not able to open output file.\n") ;
Chris@40: 		free (buffer) ;
Chris@40: 		return 1 ;
Chris@40: 		} ;
Chris@40: 
Chris@40: 	if (sfinfo.channels == 1)
Chris@40: 	{	for (k = 0 ; k < SAMPLE_COUNT ; k++)
Chris@40: 			buffer [k] = AMPLITUDE * sin (LEFT_FREQ * 2 * k * M_PI) ;
Chris@40: 		}
Chris@40: 	else if (sfinfo.channels == 2)
Chris@40: 	{	for (k = 0 ; k < SAMPLE_COUNT ; k++)
Chris@40: 		{	buffer [2 * k] = AMPLITUDE * sin (LEFT_FREQ * 2 * k * M_PI) ;
Chris@40: 			buffer [2 * k + 1] = AMPLITUDE * sin (RIGHT_FREQ * 2 * k * M_PI) ;
Chris@40: 			} ;
Chris@40: 		}
Chris@40: 	else
Chris@40: 	{	printf ("makesine can only generate mono or stereo files.\n") ;
Chris@40: 		exit (1) ;
Chris@40: 		} ;
Chris@40: 
Chris@40: 	if (sf_write_int (file, buffer, sfinfo.channels * SAMPLE_COUNT) !=
Chris@40: 											sfinfo.channels * SAMPLE_COUNT)
Chris@40: 		puts (sf_strerror (file)) ;
Chris@40: 
Chris@40: 	sf_close (file) ;
Chris@40: 	free (buffer) ;
Chris@40: 	return 0 ;
Chris@40: } /* main */
Chris@40: