| /* |
| ** Copyright (C) 1999-2011 Erik de Castro Lopo <erikd@mega-nerd.com> |
| ** |
| ** 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 */ |
| |