[154] | 1 | //roarsin.c: |
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| 2 | |
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[669] | 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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| 5 | * |
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| 6 | * This file is part of roarclients a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * RoarAudio is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 22 | * |
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| 23 | */ |
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| 24 | |
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[154] | 25 | #include <math.h> /* sin() */ |
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| 26 | #include <stdio.h> /* *printf*() */ |
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| 27 | #include <roaraudio.h> /* libroar */ |
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| 28 | |
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| 29 | int main (void) { |
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| 30 | int rate = ROAR_RATE_DEFAULT; |
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| 31 | int bits = 8; |
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| 32 | int channels = 1; /* mono */ |
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| 33 | int codec = ROAR_CODEC_DEFAULT; |
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| 34 | float freq = 523.2; /* middle C */ |
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| 35 | float step = M_PI*2*freq/rate; /* how much time per sample we have to encode ... */ |
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| 36 | float t = 0; /* current time */ |
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| 37 | float length = 5; /* 5 sec */ |
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| 38 | int fh; |
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| 39 | int i; |
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| 40 | char out[1024]; |
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| 41 | |
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| 42 | if ( (fh = roar_simple_play(rate, channels, bits, codec, NULL, "sine gen")) == -1 ) { |
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| 43 | fprintf(stderr, "Error: can not open playback!\n"); |
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| 44 | exit(1); |
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| 45 | } |
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| 46 | |
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| 47 | while (t < 2*M_PI*freq*length) { |
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| 48 | for (i = 0; i < 1024; i++) { |
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| 49 | out[i] = 127*sin(t); |
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| 50 | t += step; |
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| 51 | } |
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| 52 | write(fh, out, 1024); |
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| 53 | } |
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| 54 | |
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| 55 | roar_simple_close(fh); |
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| 56 | |
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| 57 | return 0; |
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| 58 | } |
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| 59 | |
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| 60 | //ll |
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