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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/* ====================================================================</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (c) 1999-2001 Carnegie Mellon University. All rights</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * reserved.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * modification, are permitted provided that the following conditions</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * are met:</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * notice, this list of conditions and the following disclaimer. </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"> * 2. Redistributions in binary form must reproduce the above copyright</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * notice, this list of conditions and the following disclaimer in</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * the documentation and/or other materials provided with the</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * distribution.</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * This work was supported in part by funding from the Defense Advanced </span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * Research Projects Agency and the National Science Foundation of the </span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * United States of America, and the CMU Sphinx Speech Consortium.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND </span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, </span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT </span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, </span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY </span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT </span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE </span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</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"> * ====================================================================</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"> */</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">/* -*- mode:c; indent-tabs-mode:t; c-basic-offset:4; comment-column:40 -*-</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"> * Sphinx II libad (Linux)</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * ^^^^^^^^^^^^^^^^^^^^^^^</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * $Id: ad_alsa.c,v 1.6 2001/12/11 00:24:48 lenzo Exp $</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> <span class="comment"> * John G. Dorsey (jd5q+@andrew.cmu.edu)</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * Engineering Design Research Center</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * Carnegie Mellon University</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * ***************************************************************************</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * REVISION HISTORY</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * 18-Mar-2006 David Huggins-Daines <dhuggins@cs.cmu.edu></span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * Update this to the ALSA 1.0 API.</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * 12-Dec-2000 David Huggins-Daines <dhd@cepstral.com> at Cepstral LLC</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * Make this at least compile with the new ALSA API.</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * 05-Nov-1999 Sean Levy (snl@stalphonsos.com) at St. Alphonsos, LLC.</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * Ported to ALSA so I can actually get working full-duplex.</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * 09-Aug-1999 Kevin Lenzo (lenzo@cs.cmu.edu) at Cernegie Mellon University.</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> * Incorporated nickr@cs.cmu.edu's changes (marked below) and</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * SPS_EPSILON to allow for sample rates that are "close enough".</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * 15-Jun-1999 M. K. Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon Univ.</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * Consolidated all ad functions into</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * this one file. Added ad_open_sps().</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> * Other cosmetic changes for consistency (e.g., use of err.h).</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> * 18-May-1999 Kevin Lenzo (lenzo@cs.cmu.edu) added <errno.h>.</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor">#include <fcntl.h></span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor">#include <stdlib.h></span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor">#include <string.h></span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor">#include <alsa/asoundlib.h></span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#include <errno.h></span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#include <config.h></span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor">#include <unistd.h></span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="preprocessor">#include "<a class="code" href="prim__type_8h.html">prim_type.h</a>"</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#include "<a class="code" href="ad_8h.html">ad.h</a>"</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#define AUDIO_FORMAT SND_PCM_SFMT_S16_LE </span><span class="comment">/* 16-bit signed, little endian */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#define INPUT_GAIN (85)</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#define SPS_EPSILON 200</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">static</span> <span class="keywordtype">int</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> setparams(int32 sps, snd_pcm_t * handle)</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> {</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  snd_pcm_hw_params_t *hwparams;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> out_sps, buffer_time, period_time;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordtype">int</span> err;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  snd_pcm_hw_params_alloca(&hwparams);</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  err = snd_pcm_hw_params_any(handle, hwparams);</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  fprintf(stderr, <span class="stringliteral">"Can not configure this PCM device: %s\n"</span>,</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  snd_strerror(err));</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">return</span> -1;</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> </div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  err =</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  snd_pcm_hw_params_set_access(handle, hwparams,</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  SND_PCM_ACCESS_RW_INTERLEAVED);</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  fprintf(stderr,</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="stringliteral">"Failed to set PCM device to interleaved: %s\n"</span>,</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  snd_strerror(err));</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">return</span> -1;</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>  err =</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  snd_pcm_hw_params_set_format(handle, hwparams, SND_PCM_FORMAT_S16);</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  fprintf(stderr,</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="stringliteral">"Failed to set PCM device to 16-bit signed PCM: %s\n"</span>,</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  snd_strerror(err));</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</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>  err = snd_pcm_hw_params_set_channels(handle, hwparams, 1);</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  fprintf(stderr, <span class="stringliteral">"Failed to set PCM device to mono: %s\n"</span>,</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  snd_strerror(err));</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">return</span> -1;</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> </div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  out_sps = sps;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  err =</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  snd_pcm_hw_params_set_rate_near(handle, hwparams, &out_sps, NULL);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  fprintf(stderr, <span class="stringliteral">"Failed to set sampling rate: %s\n"</span>,</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  snd_strerror(err));</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">return</span> -1;</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>  <span class="keywordflow">if</span> (abs(out_sps - sps) > SPS_EPSILON) {</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  fprintf(stderr,</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="stringliteral">"Available samping rate %d is too far from requested %d\n"</span>,</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  out_sps, sps);</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordflow">return</span> -1;</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> </div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="comment">/* Set buffer time to the maximum. */</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  err = snd_pcm_hw_params_get_buffer_time_max(hwparams, &buffer_time, 0);</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  period_time = buffer_time / 4;</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  err = snd_pcm_hw_params_set_period_time_near(handle, hwparams,</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  &period_time, 0);</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  fprintf(stderr, <span class="stringliteral">"Failed to set period time to %u: %s\n"</span>,</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  period_time, snd_strerror(err));</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  }</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  err = snd_pcm_hw_params_set_buffer_time_near(handle, hwparams,</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  &buffer_time, 0);</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  fprintf(stderr, <span class="stringliteral">"Failed to set buffer time to %u: %s\n"</span>,</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  buffer_time, snd_strerror(err));</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">return</span> -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> </div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  err = snd_pcm_hw_params(handle, hwparams);</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  fprintf(stderr, <span class="stringliteral">"Failed to set hwparams: %s\n"</span>, snd_strerror(err));</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">return</span> -1;</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> </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  err = snd_pcm_nonblock(handle, 1);</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  fprintf(stderr, <span class="stringliteral">"Failed to set non-blocking mode: %s\n"</span>,</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  snd_strerror(err));</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">return</span> -1;</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">return</span> 0;</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> </div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="keyword">static</span> <span class="keywordtype">int</span></div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> setlevels(<span class="keyword">const</span> <span class="keywordtype">char</span> *dev)</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>  snd_mixer_t *handle;</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  snd_mixer_selem_id_t *sid;</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  snd_mixer_elem_t *elem;</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordtype">int</span> err;</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordtype">char</span> *mixer_dev, *c;</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="comment">/* Basically we just want to turn on Mic capture. */</span></div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordflow">if</span> ((err = snd_mixer_open(&handle, 0)) < 0) {</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  fprintf(stderr, <span class="stringliteral">"Mixer open failed: %s\n"</span>, snd_strerror(err));</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">return</span> -1;</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> </div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  mixer_dev = strdup(dev);</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">if</span> (strncmp(mixer_dev, <span class="stringliteral">"plug"</span>, 4) == 0)</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  memmove(mixer_dev, mixer_dev + 4, strlen(mixer_dev) - 4 + 1);</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keywordflow">if</span> ((c = strchr(mixer_dev, <span class="charliteral">','</span>)))</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  *c = <span class="charliteral">'\0'</span>;</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">if</span> ((err = snd_mixer_attach(handle, mixer_dev)) < 0) {</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  fprintf(stderr, <span class="stringliteral">"Mixer attach to %s failed: %s\n"</span>,</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  mixer_dev, snd_strerror(err));</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  free(mixer_dev);</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  snd_mixer_close(handle);</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  }</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  free(mixer_dev);</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">if</span> ((err = snd_mixer_selem_register(handle, NULL, NULL)) < 0) {</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  fprintf(stderr, <span class="stringliteral">"Mixer register failed: %s\n"</span>, snd_strerror(err));</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  snd_mixer_close(handle);</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  }</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">if</span> ((err = snd_mixer_load(handle)) < 0) {</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  fprintf(stderr, <span class="stringliteral">"Mixer load failed: %s\n"</span>, snd_strerror(err));</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  snd_mixer_close(handle);</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  }</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  snd_mixer_selem_id_alloca(&sid);</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  snd_mixer_selem_id_set_name(sid, <span class="stringliteral">"Mic"</span>);</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">if</span> ((elem = snd_mixer_find_selem(handle, sid)) == NULL) {</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  fprintf(stderr, <span class="stringliteral">"Warning: Could not find Mic element\n"</span>);</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>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">if</span> (snd_mixer_selem_has_capture_switch(elem)) {</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">if</span> ((err = snd_mixer_selem_set_capture_switch_all(elem, 1)) < 0) { </div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  fprintf(stderr,</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="stringliteral">"Failed to enable microphone capture: %s\n"</span>,</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  snd_strerror(err));</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  snd_mixer_close(handle); </div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  }</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  }</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>  snd_mixer_selem_id_set_name(sid, <span class="stringliteral">"Capture"</span>);</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">if</span> ((elem = snd_mixer_find_selem(handle, sid)) == NULL) {</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  fprintf(stderr, <span class="stringliteral">"Warning: Could not find Capture element\n"</span>);</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  }</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordflow">if</span> (snd_mixer_selem_has_capture_switch(elem)) {</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">if</span> ((err = snd_mixer_selem_set_capture_switch_all(elem, 1)) < 0) {</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  fprintf(stderr,</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="stringliteral">"Failed to enable microphone capture: %s\n"</span>,</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  snd_strerror(err));</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  snd_mixer_close(handle);</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  }</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  }</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  }</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> }</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> </div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <a class="code" href="structad__rec__t.html">ad_rec_t</a> *</div>
<div class="line"><a name="l00252"></a><span class="lineno"><a class="line" href="ad_8h.html#a43f66257a2457d6c711dc5c694bfc02f"> 252</a></span> <a class="code" href="ad_8h.html#a43f66257a2457d6c711dc5c694bfc02f">ad_open_dev</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *dev, int32 sps)</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>  <a class="code" href="structad__rec__t.html">ad_rec_t</a> *handle;</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  snd_pcm_t *dspH;</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> </div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordtype">int</span> err;</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="keywordflow">if</span> (dev == NULL)</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  dev = DEFAULT_DEVICE;</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> </div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  err = snd_pcm_open(&dspH, dev, SND_PCM_STREAM_CAPTURE, 0);</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  fprintf(stderr,</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="stringliteral">"Error opening audio device %s for capture: %s\n"</span>,</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  dev, snd_strerror(err));</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordflow">return</span> NULL;</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> </div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">if</span> (setparams(sps, dspH) < 0) {</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  }</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">if</span> (setlevels(dev) < 0) {</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  }</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">if</span> ((handle = (<a class="code" href="structad__rec__t.html">ad_rec_t</a> *) calloc(1, <span class="keyword">sizeof</span>(<a class="code" href="structad__rec__t.html">ad_rec_t</a>))) == NULL) {</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  fprintf(stderr, <span class="stringliteral">"calloc(%d) failed\n"</span>, (<span class="keywordtype">int</span>)<span class="keyword">sizeof</span>(<a class="code" href="structad__rec__t.html">ad_rec_t</a>));</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  abort();</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  }</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>  handle->dspH = dspH;</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  handle->recording = 0;</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  handle-><a class="code" href="structad__rec__t.html#ac8ccccdc755f68cb4ad24007b36d6c8a">sps</a> = sps;</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  handle-><a class="code" href="structad__rec__t.html#ade5a608978908d87deea7fa9827f8510">bps</a> = <span class="keyword">sizeof</span>(int16);</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>  <span class="keywordflow">return</span> (handle);</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> }</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> </div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> <a class="code" href="structad__rec__t.html">ad_rec_t</a> *</div>
<div class="line"><a name="l00290"></a><span class="lineno"><a class="line" href="ad_8h.html#a71b4eec805fbe5c398ea0897816de6f0"> 290</a></span> <a class="code" href="ad_8h.html#a71b4eec805fbe5c398ea0897816de6f0">ad_open_sps</a>(int32 sps)</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> {</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">return</span> <a class="code" href="ad_8h.html#a43f66257a2457d6c711dc5c694bfc02f">ad_open_dev</a>(DEFAULT_DEVICE, sps);</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> <a class="code" href="structad__rec__t.html">ad_rec_t</a> *</div>
<div class="line"><a name="l00296"></a><span class="lineno"><a class="line" href="ad_8h.html#a3def0da951e840fb4c72ef9259540686"> 296</a></span> <a class="code" href="ad_8h.html#a3def0da951e840fb4c72ef9259540686">ad_open</a>(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> {</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">return</span> <a class="code" href="ad_8h.html#a71b4eec805fbe5c398ea0897816de6f0">ad_open_sps</a>(DEFAULT_SAMPLES_PER_SEC);</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> }</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> </div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> </div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> int32</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> ad_close(<a class="code" href="structad__rec__t.html">ad_rec_t</a> * handle)</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> {</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">if</span> (handle->dspH == NULL)</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordflow">return</span> AD_ERR_NOT_OPEN;</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>  <span class="keywordflow">if</span> (handle->recording) {</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">if</span> (ad_stop_rec(handle) < 0)</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">return</span> AD_ERR_GEN;</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  }</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  snd_pcm_close(handle->dspH);</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  free(handle);</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span> </div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keywordflow">return</span> (0);</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> }</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> </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> int32</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> ad_start_rec(<a class="code" href="structad__rec__t.html">ad_rec_t</a> * handle)</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>  <span class="keywordtype">int</span> err;</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> </div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keywordflow">if</span> (handle->dspH == NULL)</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">return</span> AD_ERR_NOT_OPEN;</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> </div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keywordflow">if</span> (handle->recording)</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordflow">return</span> AD_ERR_GEN;</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> </div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  err = snd_pcm_prepare(handle->dspH);</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  fprintf(stderr, <span class="stringliteral">"snd_pcm_prepare failed: %s\n"</span>, snd_strerror(err));</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">return</span> AD_ERR_GEN;</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  }</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  err = snd_pcm_start(handle->dspH);</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  fprintf(stderr, <span class="stringliteral">"snd_pcm_start failed: %s\n"</span>, snd_strerror(err));</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">return</span> AD_ERR_GEN;</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  }</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  handle->recording = 1;</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span> </div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="keywordflow">return</span> (0);</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> }</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> </div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span> </div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> int32</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> ad_stop_rec(<a class="code" href="structad__rec__t.html">ad_rec_t</a> * handle)</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> {</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordtype">int</span> err;</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="keywordflow">if</span> (handle->dspH == NULL)</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="keywordflow">return</span> AD_ERR_NOT_OPEN;</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span> </div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="keywordflow">if</span> (!handle->recording)</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keywordflow">return</span> AD_ERR_GEN;</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> </div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  err = snd_pcm_drop(handle->dspH);</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  fprintf(stderr, <span class="stringliteral">"snd_pcm_drop failed: %s\n"</span>, snd_strerror(err));</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">return</span> AD_ERR_GEN;</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  }</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  handle->recording = 0;</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> </div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">return</span> (0);</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span> }</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> </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> int32</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span> ad_read(<a class="code" href="structad__rec__t.html">ad_rec_t</a> * handle, int16 * buf, int32 max)</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>  int32 length, err;</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>  <span class="keywordflow">if</span> (!handle->recording) {</div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  fprintf(stderr, <span class="stringliteral">"Recording is stopped, start recording with ad_start_rec\n"</span>);</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="keywordflow">return</span> AD_EOF;</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  }</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span> </div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  length = snd_pcm_readi(handle->dspH, buf, max);</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">if</span> (length == -EAGAIN) {</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  length = 0;</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  }</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (length == -EPIPE) {</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  fprintf(stderr, <span class="stringliteral">"Input overrun, read calls are too rare (non-fatal)\n"</span>);</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  err = snd_pcm_prepare(handle->dspH);</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  fprintf(stderr, <span class="stringliteral">"Can't recover from underrun: %s\n"</span>,</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  snd_strerror(err));</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="keywordflow">return</span> AD_ERR_GEN;</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  }</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  length = 0;</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>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (length == -ESTRPIPE) {</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  fprintf(stderr, <span class="stringliteral">"Resuming sound driver (non-fatal)\n"</span>);</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="keywordflow">while</span> ((err = snd_pcm_resume(handle->dspH)) == -EAGAIN)</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  usleep(10000); <span class="comment">/* Wait for the driver to wake up */</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  err = snd_pcm_prepare(handle->dspH);</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keywordflow">if</span> (err < 0) {</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  fprintf(stderr, <span class="stringliteral">"Can't recover from underrun: %s\n"</span>,</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  snd_strerror(err));</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="keywordflow">return</span> AD_ERR_GEN;</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  }</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  }</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  length = 0;</div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  }</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (length < 0) {</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  fprintf(stderr, <span class="stringliteral">"Audio read error: %s\n"</span>,</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  snd_strerror(length));</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordflow">return</span> AD_ERR_GEN;</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="keywordflow">return</span> length;</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span> }</div>
<div class="ttc" id="structad__rec__t_html"><div class="ttname"><a href="structad__rec__t.html">ad_rec_t</a></div><div class="ttdef"><b>Definition:</b> <a href="ad_8h_source.html#l00255">ad.h:255</a></div></div>
<div class="ttc" id="structad__rec__t_html_ac8ccccdc755f68cb4ad24007b36d6c8a"><div class="ttname"><a href="structad__rec__t.html#ac8ccccdc755f68cb4ad24007b36d6c8a">ad_rec_t::sps</a></div><div class="ttdeci">int32 sps</div><div class="ttdoc">Samples/sec. </div><div class="ttdef"><b>Definition:</b> <a href="ad_8h_source.html#l00256">ad.h:256</a></div></div>
<div class="ttc" id="prim__type_8h_html"><div class="ttname"><a href="prim__type_8h.html">prim_type.h</a></div><div class="ttdoc">Basic type definitions used in Sphinx. </div></div>
<div class="ttc" id="structad__rec__t_html_ade5a608978908d87deea7fa9827f8510"><div class="ttname"><a href="structad__rec__t.html#ade5a608978908d87deea7fa9827f8510">ad_rec_t::bps</a></div><div class="ttdeci">int32 bps</div><div class="ttdoc">Bytes/sample. </div><div class="ttdef"><b>Definition:</b> <a href="ad_8h_source.html#l00257">ad.h:257</a></div></div>
<div class="ttc" id="ad_8h_html_a3def0da951e840fb4c72ef9259540686"><div class="ttname"><a href="ad_8h.html#a3def0da951e840fb4c72ef9259540686">ad_open</a></div><div class="ttdeci">SPHINXBASE_EXPORT ad_rec_t * ad_open(void)</div><div class="ttdoc">Open the default audio device. </div><div class="ttdef"><b>Definition:</b> <a href="ad__alsa_8c_source.html#l00296">ad_alsa.c:296</a></div></div>
<div class="ttc" id="ad_8h_html"><div class="ttname"><a href="ad_8h.html">ad.h</a></div><div class="ttdoc">generic live audio interface for recording and playback </div></div>
<div class="ttc" id="ad_8h_html_a43f66257a2457d6c711dc5c694bfc02f"><div class="ttname"><a href="ad_8h.html#a43f66257a2457d6c711dc5c694bfc02f">ad_open_dev</a></div><div class="ttdeci">SPHINXBASE_EXPORT ad_rec_t * ad_open_dev(const char *dev, int32 samples_per_sec)</div><div class="ttdoc">Open a specific audio device for recording. </div><div class="ttdef"><b>Definition:</b> <a href="ad__alsa_8c_source.html#l00252">ad_alsa.c:252</a></div></div>
<div class="ttc" id="ad_8h_html_a71b4eec805fbe5c398ea0897816de6f0"><div class="ttname"><a href="ad_8h.html#a71b4eec805fbe5c398ea0897816de6f0">ad_open_sps</a></div><div class="ttdeci">SPHINXBASE_EXPORT ad_rec_t * ad_open_sps(int32 samples_per_sec)</div><div class="ttdoc">Open the default audio device with a given sampling rate. </div><div class="ttdef"><b>Definition:</b> <a href="ad__alsa_8c_source.html#l00290">ad_alsa.c:290</a></div></div>
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