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1 ### Copyright (C) 1996 John W. Eaton |
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2 ### |
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3 ### This file is part of Octave. |
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4 ### |
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5 ### Octave is free software; you can redistribute it and/or modify it |
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6 ### under the terms of the GNU General Public License as published by |
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7 ### the Free Software Foundation; either version 2, or (at your option) |
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8 ### any later version. |
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9 ### |
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10 ### Octave is distributed in the hope that it will be useful, but |
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11 ### WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ### General Public License for more details. |
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14 ### |
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15 ### You should have received a copy of the GNU General Public License |
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16 ### along with Octave; see the file COPYING. If not, write to the Free |
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17 ### Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ### 02111-1307, USA. |
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19 |
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20 ## usage: X = record (sec [, sampling_rate]) |
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21 ## |
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22 ## Records sec seconds of audio into the vector X. |
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23 ## The default value for the sampling_rate is 8000, ie. 8kHz. |
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24 ## The program waits for you to hit the ENTER key, then the recording |
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25 ## starts immediatly. |
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26 |
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27 function X = record (sec, sampling_rate) |
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28 |
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29 ## Written by AW (Andreas.Weingessel@ci.tuwien.ac.at) on Sep 19, 1994 |
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30 ## Last modified by AW on Oct 5, 1994 |
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31 ## Copyright Dept of Probability Theory and Statistics TU Wien |
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32 |
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33 if (nargin == 1) |
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34 sampling_rate = 8000; |
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35 elseif (nargin != 2) |
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36 usage ("X = record (sec [, sampling_rate])"); |
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37 endif |
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38 |
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39 file = octave_tmp_file_name (); |
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40 |
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41 input ("Please hit ENTER and speak afterwards!\n", 1); |
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42 |
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43 cmd = sprintf ("dd if=/dev/dsp of=%s bs=%d count=%d", |
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44 file, sampling_rate, sec) |
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45 |
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46 system (cmd); |
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47 |
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48 num = fopen (file, "r"); |
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49 |
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50 [Y, c] = fread (num, sampling_rate * sec, "uchar"); |
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51 |
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52 fclose (num); |
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53 |
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54 unlink (file); |
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55 |
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56 X = Y - 127; |
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57 |
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58 endfunction |
