comparison src/libsndfile-1.0.25/examples/make_sine.c @ 0:c7265573341e

Import initial set of sources

+/*
+** Copyright (C) 1999-2011 Erik de Castro Lopo <[e-mail]>
+**
+** All rights reserved.
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in
+**       the documentation and/or other materials provided with the
+**       distribution.
+**     * Neither the author nor the names of any contributors may be used
+**       to endorse or promote products derived from this software without
+**       specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include	<stdio.h>
+#include	<stdlib.h>
+#include	<string.h>
+#include	<math.h>
+
+#include	<sndfile.h>
+
+#ifndef		M_PI
+#define		M_PI		3.14159265358979323846264338
+#endif
+
+#define		SAMPLE_RATE			44100
+#define		SAMPLE_COUNT		(SAMPLE_RATE * 4)	/* 4 seconds */
+#define		AMPLITUDE			(1.0 * 0x7F000000)
+#define		LEFT_FREQ			(344.0 / SAMPLE_RATE)
+#define		RIGHT_FREQ			(466.0 / SAMPLE_RATE)
+
+int
+main (void)
+{	SNDFILE	*file ;
+	SF_INFO	sfinfo ;
+	int		k ;
+	int	*buffer ;
+
+	if (! (buffer = malloc (2 * SAMPLE_COUNT * sizeof (int))))
+	{	printf ("Malloc failed.\n") ;
+		exit (0) ;
+		} ;
+
+	memset (&sfinfo, 0, sizeof (sfinfo)) ;
+
+	sfinfo.samplerate	= SAMPLE_RATE ;
+	sfinfo.frames		= SAMPLE_COUNT ;
+	sfinfo.channels		= 2 ;
+	sfinfo.format		= (SF_FORMAT_WAV | SF_FORMAT_PCM_24) ;
+
+	if (! (file = sf_open ("sine.wav", SFM_WRITE, &sfinfo)))
+	{	printf ("Error : Not able to open output file.\n") ;
+		return 1 ;
+		} ;
+
+	if (sfinfo.channels == 1)
+	{	for (k = 0 ; k < SAMPLE_COUNT ; k++)
+			buffer [k] = AMPLITUDE * sin (LEFT_FREQ * 2 * k * M_PI) ;
+		}
+	else if (sfinfo.channels == 2)
+	{	for (k = 0 ; k < SAMPLE_COUNT ; k++)
+		{	buffer [2 * k] = AMPLITUDE * sin (LEFT_FREQ * 2 * k * M_PI) ;
+			buffer [2 * k + 1] = AMPLITUDE * sin (RIGHT_FREQ * 2 * k * M_PI) ;
+			} ;
+		}
+	else
+	{	printf ("makesine can only generate mono or stereo files.\n") ;
+		exit (1) ;
+		} ;
+
+	if (sf_write_int (file, buffer, sfinfo.channels * SAMPLE_COUNT) !=
+											sfinfo.channels * SAMPLE_COUNT)
+		puts (sf_strerror (file)) ;
+
+	sf_close (file) ;
+	return	 0 ;
+} /* main */
+