1 | //roarsin.c: |
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2 | |
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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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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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