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<div id="projectname">PortAudio
 <span id="projectnumber">2.0</span>
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<div class="title">paex_record_file.c</div> </div>
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<a href="paex__record__file_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="l00006"></a><span class="lineno"> 6</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * $Id: paex_record_file.c 1752 2011-09-08 03:21:55Z philburk $</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"> * This program uses the PortAudio Portable Audio Library.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * For more information see: http://www.portaudio.com</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * Copyright (c) 1999-2000 Ross Bencina and Phil Burk</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * a copy of this software and associated documentation files</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * (the "Software"), to deal in the Software without restriction,</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * including without limitation the rights to use, copy, modify, merge,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * publish, distribute, sublicense, and/or sell copies of the Software,</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * and to permit persons to whom the Software is furnished to do so,</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * subject to the following conditions:</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * The above copyright notice and this permission notice shall be</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * included in all copies or substantial portions of the Software.</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</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> <span class="comment"> * The text above constitutes the entire PortAudio license; however, </span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * the PortAudio community also makes the following non-binding requests:</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * Any person wishing to distribute modifications to the Software is</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * requested to send the modifications to the original developer so that</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * they can be incorporated into the canonical version. It is also </span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * requested that these non-binding requests be included along with the </span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * license above.</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#include <stdlib.h></span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</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="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include "pa_ringbuffer.h"</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include "pa_util.h"</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#ifdef _WIN32</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor"></span><span class="preprocessor">#include <windows.h></span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#include <process.h></span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment">/* #define SAMPLE_RATE (17932) // Test failure to open with this value. */</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#define FILE_NAME "audio_data.raw"</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor"></span><span class="preprocessor">#define SAMPLE_RATE (44100)</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor"></span><span class="preprocessor">#define FRAMES_PER_BUFFER (512)</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor"></span><span class="preprocessor">#define NUM_SECONDS (10)</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor"></span><span class="preprocessor">#define NUM_CHANNELS (2)</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor"></span><span class="preprocessor">#define NUM_WRITES_PER_BUFFER (4)</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor"></span><span class="comment">/* #define DITHER_FLAG (paDitherOff) */</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#define DITHER_FLAG (0) </span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment">/* Select sample format. */</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor">#if 1</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor"></span><span class="preprocessor">#define PA_SAMPLE_TYPE paFloat32</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor"></span><span class="keyword">typedef</span> <span class="keywordtype">float</span> SAMPLE;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#define SAMPLE_SILENCE (0.0f)</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor"></span><span class="preprocessor">#define PRINTF_S_FORMAT "%.8f"</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor"></span><span class="preprocessor">#elif 1</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor"></span><span class="preprocessor">#define PA_SAMPLE_TYPE paInt16</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor"></span><span class="keyword">typedef</span> <span class="keywordtype">short</span> SAMPLE;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor">#define SAMPLE_SILENCE (0)</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 0</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 paInt8</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor"></span><span class="keyword">typedef</span> <span class="keywordtype">char</span> SAMPLE;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</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 PRINTF_S_FORMAT "%d"</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor"></span><span class="preprocessor">#else</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor"></span><span class="preprocessor">#define PA_SAMPLE_TYPE paUInt8</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor"></span><span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> SAMPLE;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#define SAMPLE_SILENCE (128)</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor"></span><span class="preprocessor">#define PRINTF_S_FORMAT "%d"</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">typedef</span> <span class="keyword">struct</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> {</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordtype">unsigned</span> frameIndex;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordtype">int</span> threadSyncFlag;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  SAMPLE *ringBufferData;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  PaUtilRingBuffer ringBuffer;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  FILE *file;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordtype">void</span> *threadHandle;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> }</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <a class="code" href="structpaTestData.html">paTestData</a>;</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">/* This routine is run in a separate thread to write data from the ring buffer into a file (during Recording) */</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="keyword">static</span> <span class="keywordtype">int</span> threadFunctionWriteToRawFile(<span class="keywordtype">void</span>* ptr)</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> {</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="structpaTestData.html">paTestData</a>* pData = (<a class="code" href="structpaTestData.html">paTestData</a>*)ptr;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="comment">/* Mark thread started */</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  pData->threadSyncFlag = 0;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">while</span> (1)</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  {</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  ring_buffer_size_t elementsInBuffer = PaUtil_GetRingBufferReadAvailable(&pData->ringBuffer);</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">if</span> ( (elementsInBuffer >= pData->ringBuffer.bufferSize / NUM_WRITES_PER_BUFFER) ||</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  pData->threadSyncFlag )</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>  <span class="keywordtype">void</span>* ptr[2] = {0};</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  ring_buffer_size_t sizes[2] = {0};</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="comment">/* By using PaUtil_GetRingBufferReadRegions, we can read directly from the ring buffer */</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  ring_buffer_size_t elementsRead = PaUtil_GetRingBufferReadRegions(&pData->ringBuffer, elementsInBuffer, ptr + 0, sizes + 0, ptr + 1, sizes + 1);</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">if</span> (elementsRead > 0)</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  {</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">for</span> (i = 0; i < 2 && ptr[i] != NULL; ++i)</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  {</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  fwrite(ptr[i], pData->ringBuffer.elementSizeBytes, sizes[i], pData->file);</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  }</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  PaUtil_AdvanceRingBufferReadIndex(&pData->ringBuffer, elementsRead);</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> </div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">if</span> (pData->threadSyncFlag)</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  }</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  }</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> </div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="comment">/* Sleep a little while... */</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <a class="code" href="portaudio_8h.html#a1b3c20044c9401c42add29475636e83d">Pa_Sleep</a>(20);</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  pData->threadSyncFlag = 0;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> }</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> </div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment">/* This routine is run in a separate thread to read data from file into the ring buffer (during Playback). When the file</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> has reached EOF, a flag is set so that the play PA callback can return paComplete */</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="keyword">static</span> <span class="keywordtype">int</span> threadFunctionReadFromRawFile(<span class="keywordtype">void</span>* ptr)</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>  <a class="code" href="structpaTestData.html">paTestData</a>* pData = (<a class="code" href="structpaTestData.html">paTestData</a>*)ptr;</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> </div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">while</span> (1)</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  {</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  ring_buffer_size_t elementsInBuffer = PaUtil_GetRingBufferWriteAvailable(&pData->ringBuffer);</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">if</span> (elementsInBuffer >= pData->ringBuffer.bufferSize / NUM_WRITES_PER_BUFFER)</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  {</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keywordtype">void</span>* ptr[2] = {0};</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  ring_buffer_size_t sizes[2] = {0};</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>  <span class="comment">/* By using PaUtil_GetRingBufferWriteRegions, we can write directly into the ring buffer */</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  PaUtil_GetRingBufferWriteRegions(&pData->ringBuffer, elementsInBuffer, ptr + 0, sizes + 0, ptr + 1, sizes + 1);</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">if</span> (!feof(pData->file))</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  {</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  ring_buffer_size_t itemsReadFromFile = 0;</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">for</span> (i = 0; i < 2 && ptr[i] != NULL; ++i)</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  {</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  itemsReadFromFile += (ring_buffer_size_t)fread(ptr[i], pData->ringBuffer.elementSizeBytes, sizes[i], pData->file);</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>  PaUtil_AdvanceRingBufferWriteIndex(&pData->ringBuffer, itemsReadFromFile);</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> </div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="comment">/* Mark thread started here, that way we "prime" the ring buffer before playback */</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  pData->threadSyncFlag = 0;</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  {</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="comment">/* No more data to read */</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  pData->threadSyncFlag = 1;</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  }</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  }</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="comment">/* Sleep a little while... */</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <a class="code" href="portaudio_8h.html#a1b3c20044c9401c42add29475636e83d">Pa_Sleep</a>(20);</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  }</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> </div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> }</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="keyword">typedef</span> int (*ThreadFunctionType)(<span class="keywordtype">void</span>*);</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="comment">/* Start up a new thread in the given function, at the moment only Windows, but should be very easy to extend</span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="comment"> to posix type OSs (Linux/Mac) */</span></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="keyword">static</span> <a class="code" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> startThread( <a class="code" href="structpaTestData.html">paTestData</a>* pData, ThreadFunctionType fn )</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> <span class="preprocessor">#ifdef _WIN32</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="preprocessor"></span> <span class="keyword">typedef</span> unsigned (__stdcall* WinThreadFunctionType)(<span class="keywordtype">void</span>*);</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  pData->threadHandle = (<span class="keywordtype">void</span>*)_beginthreadex(NULL, 0, (WinThreadFunctionType)fn, pData, CREATE_SUSPENDED, NULL);</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">if</span> (pData->threadHandle == NULL) <span class="keywordflow">return</span> paUnanticipatedHostError;</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>  <span class="comment">/* Set file thread to a little higher prio than normal */</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  SetThreadPriority(pData->threadHandle, THREAD_PRIORITY_ABOVE_NORMAL);</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="comment">/* Start it up */</span></div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  pData->threadSyncFlag = 1;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  ResumeThread(pData->threadHandle);</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="comment">/* Wait for thread to startup */</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">while</span> (pData->threadSyncFlag) {</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <a class="code" href="portaudio_8h.html#a1b3c20044c9401c42add29475636e83d">Pa_Sleep</a>(10);</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> </div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">return</span> paNoError;</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> }</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="keyword">static</span> <span class="keywordtype">int</span> stopThread( <a class="code" href="structpaTestData.html">paTestData</a>* pData )</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> {</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  pData->threadSyncFlag = 1;</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="comment">/* Wait for thread to stop */</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">while</span> (pData->threadSyncFlag) {</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <a class="code" href="portaudio_8h.html#a1b3c20044c9401c42add29475636e83d">Pa_Sleep</a>(10);</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  }</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="preprocessor">#ifdef _WIN32</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="preprocessor"></span> CloseHandle(pData->threadHandle);</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  pData->threadHandle = 0;</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">return</span> paNoError;</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> }</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> </div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> </div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment">/* This routine will be called by the PortAudio engine when audio is needed.</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment">** It may be called at interrupt level on some machines so don't do anything</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment">** that could mess up the system like calling malloc() or free().</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="keyword">static</span> <span class="keywordtype">int</span> recordCallback( <span class="keyword">const</span> <span class="keywordtype">void</span> *inputBuffer, <span class="keywordtype">void</span> *outputBuffer,</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> framesPerBuffer,</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keyword">const</span> <a class="code" href="structPaStreamCallbackTimeInfo.html">PaStreamCallbackTimeInfo</a>* timeInfo,</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <a class="code" href="portaudio_8h.html#a55a005924bcfa0424594f4f65cd4ae82">PaStreamCallbackFlags</a> statusFlags,</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordtype">void</span> *userData )</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> {</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <a class="code" href="structpaTestData.html">paTestData</a> *data = (<a class="code" href="structpaTestData.html">paTestData</a>*)userData;</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  ring_buffer_size_t elementsWriteable = PaUtil_GetRingBufferWriteAvailable(&data->ringBuffer);</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  ring_buffer_size_t elementsToWrite = min(elementsWriteable, (ring_buffer_size_t)(framesPerBuffer * NUM_CHANNELS));</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keyword">const</span> SAMPLE *rptr = (<span class="keyword">const</span> SAMPLE*)inputBuffer;</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  (void) outputBuffer; <span class="comment">/* Prevent unused variable warnings. */</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  (void) timeInfo;</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  (void) statusFlags;</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  (void) userData;</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  data->frameIndex += PaUtil_WriteRingBuffer(&data->ringBuffer, rptr, elementsToWrite);</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordflow">return</span> <a class="code" href="portaudio_8h.html#ae9bfb9c4e1895326f30f80d415c66c32acba49cbf0e3bf605bb3deecef3b4fce3">paContinue</a>;</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> }</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> </div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="comment">/* This routine will be called by the PortAudio engine when audio is needed.</span></div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span> <span class="comment">** It may be called at interrupt level on some machines so don't do anything</span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="comment">** that could mess up the system like calling malloc() or free().</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> <span class="keyword">static</span> <span class="keywordtype">int</span> playCallback( <span class="keyword">const</span> <span class="keywordtype">void</span> *inputBuffer, <span class="keywordtype">void</span> *outputBuffer,</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> framesPerBuffer,</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keyword">const</span> <a class="code" href="structPaStreamCallbackTimeInfo.html">PaStreamCallbackTimeInfo</a>* timeInfo,</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <a class="code" href="portaudio_8h.html#a55a005924bcfa0424594f4f65cd4ae82">PaStreamCallbackFlags</a> statusFlags,</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordtype">void</span> *userData )</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> {</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <a class="code" href="structpaTestData.html">paTestData</a> *data = (<a class="code" href="structpaTestData.html">paTestData</a>*)userData;</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  ring_buffer_size_t elementsToPlay = PaUtil_GetRingBufferReadAvailable(&data->ringBuffer);</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  ring_buffer_size_t elementsToRead = min(elementsToPlay, (ring_buffer_size_t)(framesPerBuffer * NUM_CHANNELS));</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  SAMPLE* wptr = (SAMPLE*)outputBuffer;</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> </div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  (void) inputBuffer; <span class="comment">/* Prevent unused variable warnings. */</span></div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  (void) timeInfo;</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  (void) statusFlags;</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  (void) userData;</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> </div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  data->frameIndex += PaUtil_ReadRingBuffer(&data->ringBuffer, wptr, elementsToRead);</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> </div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keywordflow">return</span> data->threadSyncFlag ? <a class="code" href="portaudio_8h.html#ae9bfb9c4e1895326f30f80d415c66c32aa01800db52ead393d8b0016f63d76650">paComplete</a> : <a class="code" href="portaudio_8h.html#ae9bfb9c4e1895326f30f80d415c66c32acba49cbf0e3bf605bb3deecef3b4fce3">paContinue</a>;</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> }</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> </div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> NextPowerOf2(<span class="keywordtype">unsigned</span> val)</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> {</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  val--;</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  val = (val >> 1) | val;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  val = (val >> 2) | val;</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  val = (val >> 4) | val;</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  val = (val >> 8) | val;</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  val = (val >> 16) | val;</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">return</span> ++val;</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> }</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="comment">/*******************************************************************/</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="keywordtype">int</span> main(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="keywordtype">int</span> main(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> {</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <a class="code" href="structPaStreamParameters.html">PaStreamParameters</a> inputParameters,</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  outputParameters;</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <a class="code" href="portaudio_8h.html#a19874734f89958fccf86785490d53b4c">PaStream</a>* stream;</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <a class="code" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> err = paNoError;</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <a class="code" href="structpaTestData.html">paTestData</a> data = {0};</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="keywordtype">unsigned</span> delayCntr;</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordtype">unsigned</span> numSamples;</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordtype">unsigned</span> numBytes;</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> </div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  printf(<span class="stringliteral">"patest_record.c\n"</span>); fflush(stdout);</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> </div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="comment">/* We set the ring buffer size to about 500 ms */</span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  numSamples = NextPowerOf2((<span class="keywordtype">unsigned</span>)(SAMPLE_RATE * 0.5 * NUM_CHANNELS));</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  numBytes = numSamples * <span class="keyword">sizeof</span>(SAMPLE);</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  data.ringBufferData = (SAMPLE *) PaUtil_AllocateMemory( numBytes );</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">if</span>( data.ringBufferData == NULL )</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  {</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  printf(<span class="stringliteral">"Could not allocate ring buffer data.\n"</span>);</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  }</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordflow">if</span> (PaUtil_InitializeRingBuffer(&data.ringBuffer, <span class="keyword">sizeof</span>(SAMPLE), numSamples, data.ringBufferData) < 0)</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  {</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  printf(<span class="stringliteral">"Failed to initialize ring buffer. Size is not power of 2 ??\n"</span>);</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  }</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> </div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  err = <a class="code" href="portaudio_8h.html#abed859482d156622d9332dff9b2d89da">Pa_Initialize</a>();</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> </div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</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="l00330"></a><span class="lineno"> 330</span>  <span class="keywordflow">if</span> (inputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> == <a class="code" href="portaudio_8h.html#a8c26dd5e6f28bb4cda7a1f5460282297">paNoDevice</a>) {</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  fprintf(stderr,<span class="stringliteral">"Error: No default input device.\n"</span>);</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  }</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  inputParameters.<a class="code" href="structPaStreamParameters.html#a861ff361da71fc2572dd356c9c9878ca">channelCount</a> = 2; <span class="comment">/* stereo input */</span></div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  inputParameters.<a class="code" href="structPaStreamParameters.html#ad8d2d3063757b812f9e5f8709f41052b">sampleFormat</a> = PA_SAMPLE_TYPE;</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</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#aad6629064b8c7cf043d237ea0a5cc534">defaultLowInputLatency</a>;</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  inputParameters.<a class="code" href="structPaStreamParameters.html#aff01b9fa0710ad1654471e97665c06a9">hostApiSpecificStreamInfo</a> = NULL;</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> </div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="comment">/* Record some audio. -------------------------------------------- */</span></div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  err = <a class="code" href="portaudio_8h.html#a443ad16338191af364e3be988014cbbe">Pa_OpenStream</a>(</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  &stream,</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  &inputParameters,</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  NULL, <span class="comment">/* &outputParameters, */</span></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  SAMPLE_RATE,</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  FRAMES_PER_BUFFER,</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</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="l00347"></a><span class="lineno"> 347</span>  recordCallback,</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  &data );</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> </div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="comment">/* Open the raw audio 'cache' file... */</span></div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  data.file = fopen(FILE_NAME, <span class="stringliteral">"wb"</span>);</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordflow">if</span> (data.file == 0) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> </div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="comment">/* Start the file writing thread */</span></div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  err = startThread(&data, threadFunctionWriteToRawFile);</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  err = <a class="code" href="portaudio_8h.html#a7432aadd26c40452da12fa99fc1a047b">Pa_StartStream</a>( stream );</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  printf(<span class="stringliteral">"\n=== Now recording to '"</span> FILE_NAME <span class="stringliteral">"' for %d seconds!! Please speak into the microphone. ===\n"</span>, NUM_SECONDS); fflush(stdout);</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span> </div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="comment">/* Note that the RECORDING part is limited with TIME, not size of the file and/or buffer, so you can</span></div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="comment"> increase NUM_SECONDS until you run out of disk */</span></div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  delayCntr = 0;</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordflow">while</span>( delayCntr++ < NUM_SECONDS )</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  {</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  printf(<span class="stringliteral">"index = %d\n"</span>, data.frameIndex ); fflush(stdout);</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <a class="code" href="portaudio_8h.html#a1b3c20044c9401c42add29475636e83d">Pa_Sleep</a>(1000);</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  }</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <span class="keywordflow">if</span>( err < 0 ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> </div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  err = <a class="code" href="portaudio_8h.html#a92f56f88cbd14da0e8e03077e835d104">Pa_CloseStream</a>( stream );</div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span> </div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="comment">/* Stop the thread */</span></div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  err = stopThread(&data);</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span> </div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="comment">/* Close file */</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  fclose(data.file);</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  data.file = 0;</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="comment">/* Playback recorded data. -------------------------------------------- */</span></div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  data.frameIndex = 0;</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span> </div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</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="l00388"></a><span class="lineno"> 388</span>  <span class="keywordflow">if</span> (outputParameters.<a class="code" href="structPaStreamParameters.html#aebaf648b4d11dd1252a747b76b8da084">device</a> == <a class="code" href="portaudio_8h.html#a8c26dd5e6f28bb4cda7a1f5460282297">paNoDevice</a>) {</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  fprintf(stderr,<span class="stringliteral">"Error: No default output device.\n"</span>);</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  }</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  outputParameters.<a class="code" href="structPaStreamParameters.html#a861ff361da71fc2572dd356c9c9878ca">channelCount</a> = 2; <span class="comment">/* stereo output */</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  outputParameters.<a class="code" href="structPaStreamParameters.html#ad8d2d3063757b812f9e5f8709f41052b">sampleFormat</a> = PA_SAMPLE_TYPE;</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</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> )->defaultLowOutputLatency;</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  outputParameters.<a class="code" href="structPaStreamParameters.html#aff01b9fa0710ad1654471e97665c06a9">hostApiSpecificStreamInfo</a> = NULL;</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span> </div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  printf(<span class="stringliteral">"\n=== Now playing back from file '"</span> FILE_NAME <span class="stringliteral">"' until end-of-file is reached ===\n"</span>); fflush(stdout);</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  err = <a class="code" href="portaudio_8h.html#a443ad16338191af364e3be988014cbbe">Pa_OpenStream</a>(</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  &stream,</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  NULL, <span class="comment">/* no input */</span></div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  &outputParameters,</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  SAMPLE_RATE,</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  FRAMES_PER_BUFFER,</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</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="l00405"></a><span class="lineno"> 405</span>  playCallback,</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  &data );</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span> </div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordflow">if</span>( stream )</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  {</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <span class="comment">/* Open file again for reading */</span></div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  data.file = fopen(FILE_NAME, <span class="stringliteral">"rb"</span>);</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keywordflow">if</span> (data.file != 0)</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  {</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="comment">/* Start the file reading thread */</span></div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  err = startThread(&data, threadFunctionReadFromRawFile);</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span> </div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  err = <a class="code" href="portaudio_8h.html#a7432aadd26c40452da12fa99fc1a047b">Pa_StartStream</a>( stream );</div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> </div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  printf(<span class="stringliteral">"Waiting for playback to finish.\n"</span>); fflush(stdout);</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span> </div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="comment">/* The playback will end when EOF is reached */</span></div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="keywordflow">while</span>( ( err = <a class="code" href="portaudio_8h.html#a1f8709c4971932643681a6f374c4bb5a">Pa_IsStreamActive</a>( stream ) ) == 1 ) {</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  printf(<span class="stringliteral">"index = %d\n"</span>, data.frameIndex ); fflush(stdout);</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  <a class="code" href="portaudio_8h.html#a1b3c20044c9401c42add29475636e83d">Pa_Sleep</a>(1000);</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  }</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="keywordflow">if</span>( err < 0 ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  }</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  </div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  err = <a class="code" href="portaudio_8h.html#a92f56f88cbd14da0e8e03077e835d104">Pa_CloseStream</a>( stream );</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="keywordflow">if</span>( err != paNoError ) <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span> </div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  fclose(data.file);</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  </div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  printf(<span class="stringliteral">"Done.\n"</span>); fflush(stdout);</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  }</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> </div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span> done:</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  <a class="code" href="portaudio_8h.html#a0db317604e916e8bd6098e60e6237221">Pa_Terminate</a>();</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="keywordflow">if</span>( data.ringBufferData ) <span class="comment">/* Sure it is NULL or valid. */</span></div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  PaUtil_FreeMemory( data.ringBufferData );</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="keywordflow">if</span>( err != paNoError )</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  {</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  fprintf( stderr, <span class="stringliteral">"An error occured while using the portaudio stream\n"</span> );</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  fprintf( stderr, <span class="stringliteral">"Error number: %d\n"</span>, err );</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</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="l00449"></a><span class="lineno"> 449</span>  err = 1; <span class="comment">/* Always return 0 or 1, but no other return codes. */</span></div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  }</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordflow">return</span> err;</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span> }</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span> </div>
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