<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.3.1"/> <title>PortAudio: paex_read_write_wire.c Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">PortAudio  <span id="projectnumber">2.0</span> </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.3.1 --> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> <li><a href="modules.html"><span>Modules</span></a></li> <li><a href="annotated.html"><span>Data Structures</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul> </div> <div id="navrow2" class="tabs2"> <ul class="tablist"> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>Globals</span></a></li> </ul> </div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><a class="el" href="dir_d28a4824dc47e487b107a5db32ef43c4.html">examples</a></li> </ul> </div> </div><!-- top --> <div class="header"> <div class="headertitle"> <div class="title">paex_read_write_wire.c</div> </div> </div><!--header--> <div class="contents"> <a href="paex__read__write__wire_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> </div> <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">/*</span></div> <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * $Id: patest_read_record.c 757 2004-02-13 07:48:10Z rossbencina $</span></div> <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div> <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * This program uses the PortAudio Portable Audio Library.</span></div> <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * For more information see: http://www.portaudio.com</span></div> <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * Copyright (c) 1999-2000 Ross Bencina and Phil Burk</span></div> <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> *</span></div> <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining</span></div> <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * a copy of this software and associated documentation files</span></div> <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * (the "Software"), to deal in the Software without restriction,</span></div> <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * including without limitation the rights to use, copy, modify, merge,</span></div> <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * publish, distribute, sublicense, and/or sell copies of the Software,</span></div> <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * and to permit persons to whom the Software is furnished to do so,</span></div> <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * subject to the following conditions:</span></div> <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> *</span></div> <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * The above copyright notice and this permission notice shall be</span></div> <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * included in all copies or substantial portions of the Software.</span></div> <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> *</span></div> <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span></div> <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span></div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.</span></div> <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR</span></div> <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF</span></div> <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION</span></div> <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span></div> <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> */</span></div> <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div> <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">/*</span></div> <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> * The text above constitutes the entire PortAudio license; however, </span></div> <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * the PortAudio community also makes the following non-binding requests:</span></div> <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> *</span></div> <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * Any person wishing to distribute modifications to the Software is</span></div> <div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * requested to send the modifications to the original developer so that</span></div> <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * they can be incorporated into the canonical version. It is also </span></div> <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * requested that these non-binding requests be included along with the </span></div> <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * license above.</span></div> <div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> */</span></div> <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div> <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include <stdio.h></span></div> <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include <stdlib.h></span></div> <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include <string.h></span></div> <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include "<a class="code" href="portaudio_8h.html" title="The portable PortAudio API.">portaudio.h</a>"</span></div> <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div> <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">/* #define SAMPLE_RATE (17932) // Test failure to open with this value. */</span></div> <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#define SAMPLE_RATE (44100)</span></div> <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor"></span><span class="preprocessor">#define FRAMES_PER_BUFFER (1024)</span></div> <div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor"></span><span class="preprocessor">#define NUM_CHANNELS (2)</span></div> <div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor"></span><span class="preprocessor">#define NUM_SECONDS (15)</span></div> <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor"></span><span class="comment">/* #define DITHER_FLAG (paDitherOff) */</span></div> <div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#define DITHER_FLAG (0) </span></div> <div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment">/* @todo Underflow and overflow is disabled until we fix priming of blocking write. */</span></div> <div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor">#define CHECK_OVERFLOW (0)</span></div> <div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor"></span><span class="preprocessor">#define CHECK_UNDERFLOW (0)</span></div> <div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div> <div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment">/* Select sample format. */</span></div> <div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor">#if 0</span></div> <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor"></span><span class="preprocessor">#define PA_SAMPLE_TYPE paFloat32</span></div> <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor"></span><span class="preprocessor">#define SAMPLE_SIZE (4)</span></div> <div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor"></span><span class="preprocessor">#define SAMPLE_SILENCE (0.0f)</span></div> <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor"></span><span class="preprocessor">#define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )</span></div> <div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor"></span><span class="preprocessor">#define PRINTF_S_FORMAT "%.8f"</span></div> <div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor"></span><span class="preprocessor">#elif 0</span></div> <div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor"></span><span class="preprocessor">#define PA_SAMPLE_TYPE paInt16</span></div> <div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor"></span><span class="preprocessor">#define SAMPLE_SIZE (2)</span></div> <div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor"></span><span class="preprocessor">#define SAMPLE_SILENCE (0)</span></div> <div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor"></span><span class="preprocessor">#define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )</span></div> <div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor"></span><span class="preprocessor">#define PRINTF_S_FORMAT "%d"</span></div> <div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor"></span><span class="preprocessor">#elif 1</span></div> <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor"></span><span class="preprocessor">#define PA_SAMPLE_TYPE paInt24</span></div> <div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor"></span><span class="preprocessor">#define SAMPLE_SIZE (3)</span></div> <div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor"></span><span class="preprocessor">#define SAMPLE_SILENCE (0)</span></div> <div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="preprocessor"></span><span class="preprocessor">#define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )</span></div> <div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor"></span><span class="preprocessor">#define PRINTF_S_FORMAT "%d"</span></div> <div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor"></span><span class="preprocessor">#elif 0</span></div> <div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor"></span><span class="preprocessor">#define PA_SAMPLE_TYPE paInt8</span></div> <div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor"></span><span class="preprocessor">#define SAMPLE_SIZE (1)</span></div> <div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor"></span><span class="preprocessor">#define SAMPLE_SILENCE (0)</span></div> <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor"></span><span class="preprocessor">#define CLEAR(a) memset( (a), 0, FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE )</span></div> <div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor"></span><span class="preprocessor">#define PRINTF_S_FORMAT "%d"</span></div> <div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor"></span><span class="preprocessor">#else</span></div> <div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor"></span><span class="preprocessor">#define PA_SAMPLE_TYPE paUInt8</span></div> <div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor"></span><span class="preprocessor">#define SAMPLE_SIZE (1)</span></div> <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="preprocessor"></span><span class="preprocessor">#define SAMPLE_SILENCE (128)</span></div> <div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="preprocessor"></span><span class="preprocessor">#define CLEAR( a ) { \</span></div> <div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="preprocessor"> int i; \</span></div> <div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="preprocessor"> for( i=0; i<FRAMES_PER_BUFFER*NUM_CHANNELS; i++ ) \</span></div> <div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="preprocessor"> ((unsigned char *)a)[i] = (SAMPLE_SILENCE); \</span></div> <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">}</span></div> <div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor"></span><span class="preprocessor">#define PRINTF_S_FORMAT "%d"</span></div> <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div> <div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div> <div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment">/*******************************************************************/</span></div> <div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keywordtype">int</span> main(<span class="keywordtype">void</span>);</div> <div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="keywordtype">int</span> main(<span class="keywordtype">void</span>)</div> <div class="line"><a name="l00105"></a><span class="lineno"> 105</span> {</div> <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <a class="code" href="structPaStreamParameters.html">PaStreamParameters</a> inputParameters, outputParameters;</div> <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <a class="code" href="portaudio_8h.html#a19874734f89958fccf86785490d53b4c">PaStream</a> *stream = NULL;</div> <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <a class="code" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> err;</div> <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordtype">char</span> *sampleBlock;</div> <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordtype">int</span> i;</div> <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordtype">int</span> numBytes;</div> <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div> <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  </div> <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  printf(<span class="stringliteral">"patest_read_write_wire.c\n"</span>); fflush(stdout);</div> <div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div> <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  numBytes = FRAMES_PER_BUFFER * NUM_CHANNELS * SAMPLE_SIZE ;</div> <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  sampleBlock = (<span class="keywordtype">char</span> *) malloc( numBytes );</div> <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">if</span>( sampleBlock == NULL )</div> <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  {</div> <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  printf(<span class="stringliteral">"Could not allocate record array.\n"</span>);</div> <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  exit(1);</div> <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  }</div> <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  CLEAR( sampleBlock );</div> <div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div> <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  err = <a class="code" href="portaudio_8h.html#abed859482d156622d9332dff9b2d89da">Pa_Initialize</a>();</div> <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> error;</div> <div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div> <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  inputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> = <a class="code" href="portaudio_8h.html#abf9f2f82da95553d5adb929af670f74b">Pa_GetDefaultInputDevice</a>(); <span class="comment">/* default input device */</span></div> <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  printf( <span class="stringliteral">"Input device # %d.\n"</span>, inputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> );</div> <div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  printf( <span class="stringliteral">"Input LL: %g s\n"</span>, <a class="code" href="portaudio_8h.html#ac7d8e091ffc1d1d4a035704660e117eb">Pa_GetDeviceInfo</a>( inputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> )-><a class="code" href="structPaDeviceInfo.html#aad6629064b8c7cf043d237ea0a5cc534">defaultLowInputLatency</a> );</div> <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  printf( <span class="stringliteral">"Input HL: %g s\n"</span>, <a class="code" href="portaudio_8h.html#ac7d8e091ffc1d1d4a035704660e117eb">Pa_GetDeviceInfo</a>( inputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> )-><a class="code" href="structPaDeviceInfo.html#a4214826038fcaf374beb9816024e6c9f">defaultHighInputLatency</a> );</div> <div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  inputParameters.<a class="code" href="structPaStreamParameters.html#a861ff361da71fc2572dd356c9c9878ca">channelCount</a> = NUM_CHANNELS;</div> <div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  inputParameters.<a class="code" href="structPaStreamParameters.html#ad8d2d3063757b812f9e5f8709f41052b">sampleFormat</a> = PA_SAMPLE_TYPE;</div> <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  inputParameters.<a class="code" href="structPaStreamParameters.html#aa1e80ac0551162fd091db8936ccbe9a0">suggestedLatency</a> = <a class="code" href="portaudio_8h.html#ac7d8e091ffc1d1d4a035704660e117eb">Pa_GetDeviceInfo</a>( inputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> )-><a class="code" href="structPaDeviceInfo.html#a4214826038fcaf374beb9816024e6c9f">defaultHighInputLatency</a> ;</div> <div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  inputParameters.<a class="code" href="structPaStreamParameters.html#aff01b9fa0710ad1654471e97665c06a9">hostApiSpecificStreamInfo</a> = NULL;</div> <div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div> <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  outputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> = <a class="code" href="portaudio_8h.html#adc955dfab007624000695c48d4f876dc">Pa_GetDefaultOutputDevice</a>(); <span class="comment">/* default output device */</span></div> <div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  printf( <span class="stringliteral">"Output device # %d.\n"</span>, outputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> );</div> <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  printf( <span class="stringliteral">"Output LL: %g s\n"</span>, <a class="code" href="portaudio_8h.html#ac7d8e091ffc1d1d4a035704660e117eb">Pa_GetDeviceInfo</a>( outputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> )->defaultLowOutputLatency );</div> <div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  printf( <span class="stringliteral">"Output HL: %g s\n"</span>, <a class="code" href="portaudio_8h.html#ac7d8e091ffc1d1d4a035704660e117eb">Pa_GetDeviceInfo</a>( outputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> )->defaultHighOutputLatency );</div> <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  outputParameters.<a class="code" href="structPaStreamParameters.html#a861ff361da71fc2572dd356c9c9878ca">channelCount</a> = NUM_CHANNELS;</div> <div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  outputParameters.<a class="code" href="structPaStreamParameters.html#ad8d2d3063757b812f9e5f8709f41052b">sampleFormat</a> = PA_SAMPLE_TYPE;</div> <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  outputParameters.<a class="code" href="structPaStreamParameters.html#aa1e80ac0551162fd091db8936ccbe9a0">suggestedLatency</a> = <a class="code" href="portaudio_8h.html#ac7d8e091ffc1d1d4a035704660e117eb">Pa_GetDeviceInfo</a>( outputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> )->defaultHighOutputLatency;</div> <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  outputParameters.<a class="code" href="structPaStreamParameters.html#aff01b9fa0710ad1654471e97665c06a9">hostApiSpecificStreamInfo</a> = NULL;</div> <div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div> <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="comment">/* -- setup -- */</span></div> <div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div> <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  err = <a class="code" href="portaudio_8h.html#a443ad16338191af364e3be988014cbbe">Pa_OpenStream</a>(</div> <div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  &stream,</div> <div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  &inputParameters,</div> <div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  &outputParameters,</div> <div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  SAMPLE_RATE,</div> <div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  FRAMES_PER_BUFFER,</div> <div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <a class="code" href="portaudio_8h.html#a837b8a81be3f7e36c96003e0d8dcec12">paClipOff</a>, <span class="comment">/* we won't output out of range samples so don't bother clipping them */</span></div> <div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  NULL, <span class="comment">/* no callback, use blocking API */</span></div> <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  NULL ); <span class="comment">/* no callback, so no callback userData */</span></div> <div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> error;</div> <div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div> <div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  err = <a class="code" href="portaudio_8h.html#a7432aadd26c40452da12fa99fc1a047b">Pa_StartStream</a>( stream );</div> <div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> error;</div> <div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  printf(<span class="stringliteral">"Wire on. Will run %d seconds.\n"</span>, NUM_SECONDS); fflush(stdout);</div> <div class="line"><a name="l00162"></a><span class="lineno"> 162</span> </div> <div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordflow">for</span>( i=0; i<(NUM_SECONDS*SAMPLE_RATE)/FRAMES_PER_BUFFER; ++i )</div> <div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  {</div> <div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  err = <a class="code" href="portaudio_8h.html#a075a6efb503a728213bdae24347ed27d">Pa_WriteStream</a>( stream, sampleBlock, FRAMES_PER_BUFFER );</div> <div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">if</span>( err && CHECK_UNDERFLOW ) <span class="keywordflow">goto</span> xrun;</div> <div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  err = <a class="code" href="portaudio_8h.html#a0b62d4b74b5d3d88368e9e4c0b8b2dc7">Pa_ReadStream</a>( stream, sampleBlock, FRAMES_PER_BUFFER );</div> <div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">if</span>( err && CHECK_OVERFLOW ) <span class="keywordflow">goto</span> xrun;</div> <div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div> <div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  err = <a class="code" href="portaudio_8h.html#af18dd60220251286c337631a855e38a0">Pa_StopStream</a>( stream );</div> <div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> error;</div> <div class="line"><a name="l00172"></a><span class="lineno"> 172</span> </div> <div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  CLEAR( sampleBlock );</div> <div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment">/*</span></div> <div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> err = Pa_StartStream( stream );</span></div> <div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> if( err != paNoError ) goto error;</span></div> <div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> printf("Wire on. Interrupt to stop.\n"); fflush(stdout);</span></div> <div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"></span></div> <div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"> while( 1 )</span></div> <div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"> {</span></div> <div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"> err = Pa_WriteStream( stream, sampleBlock, FRAMES_PER_BUFFER );</span></div> <div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"> if( err ) goto xrun;</span></div> <div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment"> err = Pa_ReadStream( stream, sampleBlock, FRAMES_PER_BUFFER );</span></div> <div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment"> if( err ) goto xrun;</span></div> <div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment"> }</span></div> <div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment"> err = Pa_StopStream( stream );</span></div> <div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment"> if( err != paNoError ) goto error;</span></div> <div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment"></span></div> <div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="comment"> Pa_CloseStream( stream );</span></div> <div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="comment">*/</span></div> <div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  free( sampleBlock );</div> <div class="line"><a name="l00192"></a><span class="lineno"> 192</span> </div> <div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <a class="code" href="portaudio_8h.html#a0db317604e916e8bd6098e60e6237221">Pa_Terminate</a>();</div> <div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">return</span> 0;</div> <div class="line"><a name="l00195"></a><span class="lineno"> 195</span> </div> <div class="line"><a name="l00196"></a><span class="lineno"> 196</span> xrun:</div> <div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">if</span>( stream ) {</div> <div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <a class="code" href="portaudio_8h.html#a138e57abde4e833c457b64895f638a25">Pa_AbortStream</a>( stream );</div> <div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <a class="code" href="portaudio_8h.html#a92f56f88cbd14da0e8e03077e835d104">Pa_CloseStream</a>( stream );</div> <div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  }</div> <div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  free( sampleBlock );</div> <div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <a class="code" href="portaudio_8h.html#a0db317604e916e8bd6098e60e6237221">Pa_Terminate</a>();</div> <div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">if</span>( err & <a class="code" href="portaudio_8h.html#aea144f0edaf02d0ac8b113f41fb95c47">paInputOverflow</a> )</div> <div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  fprintf( stderr, <span class="stringliteral">"Input Overflow.\n"</span> );</div> <div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">if</span>( err & <a class="code" href="portaudio_8h.html#aa17c91c859b12ebbf53a1440def53c89">paOutputUnderflow</a> )</div> <div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  fprintf( stderr, <span class="stringliteral">"Output Underflow.\n"</span> );</div> <div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keywordflow">return</span> -2;</div> <div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div> <div class="line"><a name="l00209"></a><span class="lineno"> 209</span> error:</div> <div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">if</span>( stream ) {</div> <div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <a class="code" href="portaudio_8h.html#a138e57abde4e833c457b64895f638a25">Pa_AbortStream</a>( stream );</div> <div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <a class="code" href="portaudio_8h.html#a92f56f88cbd14da0e8e03077e835d104">Pa_CloseStream</a>( stream );</div> <div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  }</div> <div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  free( sampleBlock );</div> <div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <a class="code" href="portaudio_8h.html#a0db317604e916e8bd6098e60e6237221">Pa_Terminate</a>();</div> <div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  fprintf( stderr, <span class="stringliteral">"An error occured while using the portaudio stream\n"</span> );</div> <div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  fprintf( stderr, <span class="stringliteral">"Error number: %d\n"</span>, err );</div> <div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  fprintf( stderr, <span class="stringliteral">"Error message: %s\n"</span>, <a class="code" href="portaudio_8h.html#ae606855a611cf29c7d2d7421df5e3b5d">Pa_GetErrorText</a>( err ) );</div> <div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">return</span> -1;</div> <div class="line"><a name="l00220"></a><span class="lineno"> 220</span> }</div> <div class="line"><a name="l00221"></a><span class="lineno"> 221</span> </div> </div><!-- fragment --></div><!-- contents --> <hr size="1"><address style="text-align: right;"><small>Generated for PortAudio by <a href="http://www.doxygen.org/index.html"> <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a>1.8.3.1</small></address> </body> </html>