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https://gitee.com/openharmony/third_party_libsnd
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90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
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** Copyright (C) 1999-2003 Erik de Castro Lopo <erikd@mega-nerd.com>
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <sndfile.h>
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#ifndef M_PI
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#define M_PI 3.14159265358979323846264338
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#endif
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#define SAMPLE_RATE 44100
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#define SAMPLE_COUNT (SAMPLE_RATE*4) /* 4 seconds */
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#define AMPLITUDE (1.0 * 0x7F000000)
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#define LEFT_FREQ (344.0 / SAMPLE_RATE)
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#define RIGHT_FREQ (466.0 / SAMPLE_RATE)
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int
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main (void)
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{ SNDFILE *file ;
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SF_INFO sfinfo ;
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int k ;
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int *buffer ;
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if (! (buffer = malloc (2 * SAMPLE_COUNT * sizeof (int))))
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{ printf ("Malloc failed.\n") ;
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exit (0) ;
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} ;
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memset (&sfinfo, 0, sizeof (sfinfo)) ;
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sfinfo.samplerate = SAMPLE_RATE ;
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sfinfo.frames = SAMPLE_COUNT ;
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sfinfo.channels = 2 ;
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sfinfo.format = (SF_FORMAT_WAV | SF_FORMAT_PCM_24) ;
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if (! (file = sf_open ("sine.wav", SFM_WRITE, &sfinfo)))
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{ printf ("Error : Not able to open output file.\n") ;
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return 1 ;
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} ;
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if (sfinfo.channels == 1)
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{ for (k = 0 ; k < SAMPLE_COUNT ; k++)
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buffer [k] = AMPLITUDE * sin (LEFT_FREQ * 2 * k * M_PI) ;
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}
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else if (sfinfo.channels == 2)
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{ for (k = 0 ; k < SAMPLE_COUNT ; k++)
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{ buffer [2*k ] = AMPLITUDE * sin (LEFT_FREQ * 2 * k * M_PI) ;
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buffer [2*k+1] = AMPLITUDE * sin (RIGHT_FREQ * 2 * k * M_PI) ;
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} ;
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}
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else
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{ printf ("makesine can only generate mono or stereo files.\n") ;
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exit (1) ;
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} ;
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if (sf_write_int (file, buffer, sfinfo.channels * SAMPLE_COUNT) !=
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sfinfo.channels * SAMPLE_COUNT)
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puts (sf_strerror (file)) ;
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sf_close (file) ;
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return 0 ;
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} /* main */
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/*
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** Do not edit or modify anything in this comment block.
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** The arch-tag line is a file identity tag for the GNU Arch
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** revision control system.
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**
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** arch-tag: fd945a2c-a306-49ef-a262-6336ced15246
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*/
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