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annotate scripts/audio/@audioplayer/audioplayer.m @ 19605:72304a4e010a

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Use Octave coding conventions for documentation of audio functions. * audio.txi, audioread.cc, @audioplayer/audioplayer.m, @audioplayer/get.m, @audioplayer/play.m, @audioplayer/playblocking.m, @audioplayer/set.m, @audiorecorder/audiorecorder.m, @audiorecorder/get.m, @audiorecorder/getaudiodata.m, @audiorecorder/play.m, @audiorecorder/record.m, @audiorecorder/set.m: Use Octave documentation standards. * audiodevinfo.cc: Limit lines to 80 chars. Indent according to GNU style.
author Rik <rik@octave.org>
date Tue, 13 Jan 2015 08:54:25 -0800
parents e75df9e43e63
children b2fe4dbe5266
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1 ## Copyright (C) 2013 Vytautas Jančauskas
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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 3 of the License, or (at
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8 ## your option) 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, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {@var{player} =} audioplayer (@var{y}, @var{fs})
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21 ## @deftypefnx {Function File} {@var{player} =} audioplayer (@var{y}, @var{fs}, @var{nbits})
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22 ## @deftypefnx {Function File} {@var{player} =} audioplayer (@var{y}, @var{fs}, @var{nbits}, @var{id})
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23 ## @deftypefnx {Function File} {@var{player} =} audioplayer (@var{recorder})
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24 ## @deftypefnx {Function File} {@var{player} =} audioplayer (@var{recorder}, @var{id})
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25 ## Create an audioplayer object that will play back data @var{y} at sample
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26 ## rate @var{fs}. The optional arguments @var{nbits}, and @var{id}
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27 ## specify the bit depth and player device id, respectively. Device IDs
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28 ## may be found using the audiodevinfo function.
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29 ## Given an audioplayer object, use the data from the object to
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30 ## initialize the player.
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31 ##
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32 ## The signal @var{y} can be a vector or a two-dimensional array.
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33 ##
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34 ## The following example will create an audioplayer object that will play
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35 ## back one second of white noise at 44100 sample rate using 8 bits per
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36 ## sample.
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37 ##
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38 ## @example
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39 ## @group
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40 ## y = randn (2, 44100) - 0.5;
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41 ## player = audioplayer (y, 44100, 8);
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42 ## play (player);
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43 ## @end group
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44 ## @end example
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45 ## @end deftypefn
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46
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47 ## FIXME: callbacks don't work properly, apparently because portaudio
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48 ## will execute the callbacks in a separate thread, and calling Octave
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49 ## functions in a separate thread which is likely to cause trouble with
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50 ## all of Octave's global data...
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51 ##
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52 ## @deftypefnx {Function File} {@var{player} =} audioplayer (@var{function}, @dots{})
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53 ##
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54 ## Given a function handle, use that function to process the audio.
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55 #
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56 ## The following example will create and register a callback that generates
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57 ## a sine wave on both channels.
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58 ##
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59 ## @example
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60 ## @group
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61 ## function [ sound, status ] = callback_sine (frames)
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62 ## global lphase = 0.0;
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63 ## global rphase = 0.0;
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64 ## incl = 440.0 / 44100.0;
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65 ## incr = 443.0 / 44100.0;
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66 ## nl = incl * frames;
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67 ## nr = incr * frames;
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68 ## left = sin (2.0 * pi * [lphase:incl:lphase+nl]);
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69 ## right = sin (2.0 * pi * [rphase:incr:rphase+nr]);
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70 ## sound = [left', right'];
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71 ## status = 0;
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72 ## lphase = lphase + nl;
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73 ## rphase = rphase + nr;
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74 ## endfunction
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75 ## player = audioplayer (@@callback_sine, 44100);
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76 ## play (player);
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77 ## # play for as long as you want
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78 ## stop (player);
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79 ## @end group
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80
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81 function player = audioplayer (varargin)
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82
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83 if (nargin < 1 || nargin > 4
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84 || (nargin < 2 && (isa (varargin{1}, "function_handle")
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85 || ischar (varargin{1}))))
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86 print_usage ();
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87 endif
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88
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89 if (isa (varargin{1}, "audiorecorder"))
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90 if (nargin == 1)
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91 player = getplayer (varargin{1});
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92 elseif (nargin == 2)
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93 recorder = varargin{1};
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94 data = getaudiodata (recorder);
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95 player = audioplayer (data, get (recorder, "SampleRate"),
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96 get (recorder, "BitsPerSample"), varargin{2});
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97 else
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98 print_usage ();
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99 endif
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100 else
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101 if (ischar (varargin{1}))
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102 varargin{1} = str2func (varargin{1});
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103 endif
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104 player.player = __player_audioplayer__ (varargin{:});
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105 player = class (player, "audioplayer");
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106 endif
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107
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108 endfunction
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109
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110 %!testif HAVE_PORTAUDIO
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111 %! mono = randn (1, 44100) - 0.5;
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112 %! stereo = randn (2, 44100) - 0.5;
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113 %! fs = 44100;
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114 %! player1 = audioplayer (mono, fs);
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115 %! player2 = audioplayer (stereo, fs);
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116 %! assert (player1.NumberOfChannels, 1);
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117 %! assert (player2.NumberOfChannels, 2);
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118 %! assert (player1.SampleRate, 44100);
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119 %! assert (player2.SampleRate, 44100);
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120 %! assert (player1.TotalSamples, 44100);
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121 %! assert (player2.TotalSamples, 44100);
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122 %! playblocking (player1);
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123 %! playblocking (player2);
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124
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125 %!testif HAVE_PORTAUDIO
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126 %! audio = randn (2, 88200) - 0.5;
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127 %! fs = 44100;
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128 %! player = audioplayer (audio, fs);
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129 %! assert (!isplaying (player));
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130 %! play (player);
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131 %! assert (isplaying (player));
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132 %! sleep (1);
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133 %! pause (player);
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134 %! assert (!isplaying (player));
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135 %! sleep (1);
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136 %! resume (player);
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137 %! assert (isplaying (player));
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138 %! sleep (1);
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139
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140 %!testif HAVE_PORTAUDIO
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141 %! audio = randn (2, 88200) - 0.5;
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142 %! fs = 44100;
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143 %! player = audioplayer (audio, fs);
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144 %! assert (!isplaying (player));
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145 %! play (player);
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146 %! assert (isplaying (player));
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147 %! sleep (1);
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148 %! stop (player);
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149 %! sleep (1);
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150 %! assert (!isplaying (player));
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151 %! assert (player.CurrentSample, 0);
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152
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153 %!testif HAVE_PORTAUDIO
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154 %! audio = randn (2, 44100) - 0.5;
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155 %! fs = 44100;
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156 %! player = audioplayer (audio, fs);
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157 %! set (player, {"SampleRate", "Tag", "UserData"}, {8000, "tag", [1, 2; 3, 4]});
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158 %! assert (player.SampleRate, 8000);
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159 %! assert (player.Tag, "tag");
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160 %! assert (player.UserData, [1, 2; 3, 4]);
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161
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162 %!testif HAVE_PORTAUDIO
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163 %! audio = randn (2, 44100) - 0.5;
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164 %! fs = 44100;
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165 %! player = audioplayer (audio, fs);
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166 %! settable = set (player);
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167 %! settable.SampleRate = 8000;
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168 %! settable.Tag = "tag";
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169 %! settable.UserData = [1, 2; 3, 4];
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170 %! set (player, settable);
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171 %! assert (player.SampleRate, 8000);
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172 %! assert (player.Tag, "tag");
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173 %! assert (player.UserData, [1, 2; 3, 4]);
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174
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175 %!testif HAVE_PORTAUDIO
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176 %! audio = randn (2, 44100) - 0.5;
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177 %! fs = 44100;
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178 %! player = audioplayer (audio, fs);
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179 %! player.SampleRate = 8000;
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180 %! player.Tag = "tag";
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181 %! player.UserData = [1, 2; 3, 4];
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182 %! properties = get (player, {"SampleRate", "Tag", "UserData"});
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183 %! assert (properties, {8000, "tag", [1, 2; 3, 4]});
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184
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185 #%!function [sound, status] = callback (samples)
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186 #%! sound = rand (samples, 2) - 0.5;
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187 #%! status = 0;
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188 #%!endfunction
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189
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190 #%!testif HAVE_PORTAUDIO
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191 #%! player = audioplayer (@callback, 44100);
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192 #%! play (player);
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193 #%! sleep (2);
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194 #%! stop (player);
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195 #%! assert (1);
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196
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197 #%!testif HAVE_PORTAUDIO
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198 #%! player = audioplayer ("callback", 44100, 16);
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199 #%! play (player);
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200 #%! sleep (2);
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201 #%! stop (player);
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202 #%! assert (1);