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<a href="MpegBitstream_8cxx.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG)</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * UNIVERSITAT POMPEU FABRA</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</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"> * This program is free software; you can redistribute it and/or modify</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * it under the terms of the GNU General Public License as published by</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * the Free Software Foundation; either version 2 of the License, or</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * (at your option) any later version.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * This program is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * GNU General Public License for more details.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * You should have received a copy of the GNU General Public License</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * along with this program; if not, write to the Free Software</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> *</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> </div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include "<a class="code" href="MpegBitstream_8hxx.html">MpegBitstream.hxx</a>"</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "<a class="code" href="Assert_8hxx.html" title="Bug hunting and detection facilities for developers.">Assert.hxx</a>"</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <cstring></span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <iostream></span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <sstream></span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <iomanip></span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">namespace </span>CLAM</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> {</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">namespace </span>AudioCodecs</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> {</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="comment">// MRJ: This number was extracted from Underbit's own</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="comment">// mp3 player code ( mad-0.14.2b2, player.c:86 ). As they</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="comment">// say: 40000 bytes is worth 2.5 secs of audio on a stream</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="comment">// with 128 kpbs, 1s with 320 kbps</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> MpegBitstream::mInputBufferSize = 5*8192;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="comment">// Taken from alsaplayer</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"><a class="code" href="namespaceCLAM_1_1AudioCodecs.html#a8fa0ed57c1609bff055617fb5dfbd21d"> 41</a></span>  <span class="keyword">static</span> std::string <a class="code" href="namespaceCLAM_1_1AudioCodecs.html#a8fa0ed57c1609bff055617fb5dfbd21d">MadError</a>(<span class="keyword">enum</span> mad_error error)</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  {</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordflow">switch</span> (error) {</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">case</span> MAD_ERROR_BUFLEN:</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">case</span> MAD_ERROR_BUFPTR:</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">/* these errors are handled specially and/or should not occur */</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">case</span> MAD_ERROR_NOMEM: <span class="keywordflow">return</span> (<span class="stringliteral">"not enough memory"</span>);</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">case</span> MAD_ERROR_LOSTSYNC: <span class="keywordflow">return</span> (<span class="stringliteral">"lost synchronization"</span>);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">case</span> MAD_ERROR_BADLAYER: <span class="keywordflow">return</span> (<span class="stringliteral">"reserved header layer value"</span>);</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">case</span> MAD_ERROR_BADBITRATE: <span class="keywordflow">return</span> (<span class="stringliteral">"forbidden bitrate value"</span>);</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">case</span> MAD_ERROR_BADSAMPLERATE: <span class="keywordflow">return</span> (<span class="stringliteral">"reserved sample frequency value"</span>);</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">case</span> MAD_ERROR_BADEMPHASIS: <span class="keywordflow">return</span> (<span class="stringliteral">"reserved emphasis value"</span>);</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">case</span> MAD_ERROR_BADCRC: <span class="keywordflow">return</span> (<span class="stringliteral">"CRC check failed"</span>);</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">case</span> MAD_ERROR_BADBITALLOC: <span class="keywordflow">return</span> (<span class="stringliteral">"forbidden bit allocation value"</span>);</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">case</span> MAD_ERROR_BADSCALEFACTOR: <span class="keywordflow">return</span> (<span class="stringliteral">"bad scalefactor index"</span>);</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">case</span> MAD_ERROR_BADFRAMELEN: <span class="keywordflow">return</span> (<span class="stringliteral">"bad frame length"</span>);</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">case</span> MAD_ERROR_BADBIGVALUES: <span class="keywordflow">return</span> (<span class="stringliteral">"bad big_values count"</span>);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">case</span> MAD_ERROR_BADBLOCKTYPE: <span class="keywordflow">return</span> (<span class="stringliteral">"reserved block_type"</span>);</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">case</span> MAD_ERROR_BADSCFSI: <span class="keywordflow">return</span> (<span class="stringliteral">"bad scalefactor selection info"</span>);</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">case</span> MAD_ERROR_BADDATAPTR: <span class="keywordflow">return</span> (<span class="stringliteral">"bad main_data_begin pointer"</span>);</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">case</span> MAD_ERROR_BADPART3LEN: <span class="keywordflow">return</span> (<span class="stringliteral">"bad audio data length"</span>);</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">case</span> MAD_ERROR_BADHUFFTABLE: <span class="keywordflow">return</span> (<span class="stringliteral">"bad Huffman table select"</span>);</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">case</span> MAD_ERROR_BADHUFFDATA: <span class="keywordflow">return</span> (<span class="stringliteral">"Huffman data overrun"</span>);</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">case</span> MAD_ERROR_BADSTEREO: <span class="keywordflow">return</span> (<span class="stringliteral">"incompatible block_type for JS"</span>);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">default</span>:;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  }</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  std::ostringstream os;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  os << <span class="stringliteral">"error 0x"</span> << std::setbase(16) << std::setfill(<span class="charliteral">'4'</span>) << std::setw(4) << error;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> os.str();</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div>
<div class="line"><a name="l00074"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#aab540e707b0a5efb6c94f256dd4f62b8"> 74</a></span>  <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#aab540e707b0a5efb6c94f256dd4f62b8">MpegBitstream::MpegBitstream</a>()</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  : mpFile(<a class="code" href="OSDefines_8hxx.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  {</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  mInputBuffer = <span class="keyword">new</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>[mInputBufferSize];</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  }</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  </div>
<div class="line"><a name="l00080"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a7d41b0c0a34ae76e4ad6d1c2162fbd93"> 80</a></span>  <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a7d41b0c0a34ae76e4ad6d1c2162fbd93">MpegBitstream::~MpegBitstream</a>()</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  {</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">if</span> ( mInputBuffer )</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keyword">delete</span> [] mInputBuffer;</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> </div>
<div class="line"><a name="l00086"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a7458f6db7738b9d720f41b95a919b2f4"> 86</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#ade8cbba0e144f0985c678286725fbad0">MpegBitstream::Init</a>( FILE* fp )</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  {</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  mpFile = fp;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#ade8cbba0e144f0985c678286725fbad0">Init</a>();</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> </div>
<div class="line"><a name="l00092"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#ade8cbba0e144f0985c678286725fbad0"> 92</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#ade8cbba0e144f0985c678286725fbad0">MpegBitstream::Init</a>()</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  {</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  mad_stream_init( &mBitstream );</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  mad_frame_init( &mCurrentFrame );</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  mad_synth_init( &mMpegSynth );</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  mad_timer_reset( &mStreamTimer );</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  mFatalError = <span class="keyword">false</span>;</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> </div>
<div class="line"><a name="l00101"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#aa0d2c2bfe55a9305e294f827d91d3abc"> 101</a></span>  <a class="code" href="namespaceCLAM.html#aba1a20c1581f88d249cfcbcfd8a377c5">TTime</a> <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#aa0d2c2bfe55a9305e294f827d91d3abc">MpegBitstream::Finish</a>()</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>  mad_synth_finish( &mMpegSynth );</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  mad_frame_finish( &mCurrentFrame );</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  mad_stream_finish( &mBitstream );</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">return</span> (<a class="code" href="namespaceCLAM.html#aba1a20c1581f88d249cfcbcfd8a377c5">TTime</a>)mad_timer_count( mStreamTimer, MAD_UNITS_MILLISECONDS );</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div>
<div class="line"><a name="l00110"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a1b8b3230cda863618a60aaa3666bf4b4"> 110</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a1b8b3230cda863618a60aaa3666bf4b4">MpegBitstream::EOS</a>()</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  {</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">if</span> ( feof( mpFile ) ) <span class="comment">// no more frames</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div>
<div class="line"><a name="l00117"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a0dd0548a0ab4b03cb7b70420ec6a5d81"> 117</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a0dd0548a0ab4b03cb7b70420ec6a5d81">MpegBitstream::FatalError</a>()</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">return</span> mFatalError || ferror(mpFile)!=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> </div>
<div class="line"><a name="l00122"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#ab608293a31f65fc81507cee8da2c761a"> 122</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#ab608293a31f65fc81507cee8da2c761a">MpegBitstream::EnsureEnoughBufferData</a>()</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>  <span class="keywordtype">bool</span> firstFrameAfterSeek = mBitstream.buffer == <a class="code" href="OSDefines_8hxx.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordtype">bool</span> lastDecodeNeededMoreData = mBitstream.error == MAD_ERROR_BUFLEN;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">if</span> ( not firstFrameAfterSeek and not lastDecodeNeededMoreData) <span class="keywordflow">return</span> <span class="keyword">true</span>;</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>  <a class="code" href="classint.html">TSize</a> remaining = 0;</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">if</span> (not firstFrameAfterSeek)</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>  remaining = mBitstream.bufend - mBitstream.next_frame;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  memmove( mInputBuffer, mBitstream.next_frame, remaining );</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>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> * readStart = mInputBuffer + remaining;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <a class="code" href="classint.html">TSize</a> readSize = mInputBufferSize - remaining;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  mBufferFileOffset = ftell(mpFile) - remaining;</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <a class="code" href="classint.html">TSize</a> actuallyRead = fread( readStart, <span class="keyword">sizeof</span>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>), readSize, mpFile );</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>  <span class="keywordflow">if</span> ( actuallyRead == 0 ) <span class="keywordflow">return</span> <span class="keyword">false</span>; <span class="comment">// Eof or ferror</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="comment">// Less bytes than expected were read, add buffer guard</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">if</span> ( actuallyRead < readSize )</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>  <a class="code" href="Assert_8hxx.html#a0013fa617be6fec21a9ad7180e7d8cff" title="An assertion is a check on an expression that must be true given that all the contracts are fullfille...">CLAM_ASSERT</a>( readStart + actuallyRead + MAD_BUFFER_GUARD <= mInputBuffer + mInputBufferSize,</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="stringliteral">"Whoops! no room left for buffer guard bytes"</span> );</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="comment">// Add mad buffer guard</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  memset(readStart+actuallyRead, 0, MAD_BUFFER_GUARD);</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  actuallyRead += MAD_BUFFER_GUARD;</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  }</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>  mad_stream_buffer( &mBitstream, mInputBuffer, actuallyRead+remaining );</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  mBitstream.error = MAD_ERROR_NONE; <span class="comment">// DGG: Why that?</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</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> </div>
<div class="line"><a name="l00157"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a8ce7b29b3a2f2876528f68410260f043"> 157</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a8ce7b29b3a2f2876528f68410260f043" title="Returns false on eof, fatal decoding error or file error Returns true on successfull frame read...">MpegBitstream::NextFrame</a>()</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="keywordflow">while</span>( not ferror(mpFile) )</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  {</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">if</span> (not <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#ab608293a31f65fc81507cee8da2c761a">EnsureEnoughBufferData</a>()) <span class="keywordflow">return</span> <span class="keyword">false</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>  <span class="keywordtype">int</span> error = mad_frame_decode(&mCurrentFrame, &mBitstream);</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">if</span> (error != -1) </div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  {</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="comment">// frame was decoded right</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="comment">// we add this frame duration to the bitstream internal timer</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  mad_timer_add( &mStreamTimer, mCurrentFrame.header.duration );</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  }</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="keywordflow">if</span> ( MAD_RECOVERABLE( mBitstream.error ) )</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  {</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment">// std::cerr << "MP3 recoverable error ignored: " << MadError(mBitstream.error) << std::endl;</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">continue</span>; <span class="comment">// Recoverable error, ignore</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="keywordflow">if</span> ( mBitstream.error == MAD_ERROR_BUFLEN ) <span class="keywordflow">continue</span>; <span class="comment">// Not enough data, take more</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="comment">// Some fatal error happened!</span></div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  mFatalError = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  std::cerr << <span class="stringliteral">"MP3 fatal error: "</span> << <a class="code" href="namespaceCLAM_1_1AudioCodecs.html#a8fa0ed57c1609bff055617fb5dfbd21d">MadError</a>(mBitstream.error) << std::endl;</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">return</span> <span class="keyword">false</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="keywordflow">return</span> <span class="keyword">false</span>; <span class="comment">// file error</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div>
<div class="line"><a name="l00186"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#ac630ccfd898d5be633c755775dd7f00c"> 186</a></span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#ac630ccfd898d5be633c755775dd7f00c">MpegBitstream::CurrentFrameFileOffset</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="keyword"> </span>{</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> frameOffset = mBitstream.this_frame - mInputBuffer;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">return</span> mBufferFileOffset + frameOffset;</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</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"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#af11537ac13a2338220639a969291c002"> 192</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#af11537ac13a2338220639a969291c002">MpegBitstream::SynthesizeCurrent</a>()</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  {</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  mad_synth_frame( &mMpegSynth, &mCurrentFrame );</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> </div>
<div class="line"><a name="l00197"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a2f52a9a96ccb816e810188935a1357ab"> 197</a></span>  <span class="keyword">struct </span>mad_frame& <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a2f52a9a96ccb816e810188935a1357ab">MpegBitstream::CurrentFrame</a>()</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  {</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">return</span> mCurrentFrame;</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> </div>
<div class="line"><a name="l00202"></a><span class="lineno"><a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a78f415c0007811996243cf1c785660a5"> 202</a></span>  <span class="keyword">struct </span>mad_synth& <a class="code" href="classCLAM_1_1AudioCodecs_1_1MpegBitstream.html#a78f415c0007811996243cf1c785660a5">MpegBitstream::CurrentSynthesis</a>()</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="keywordflow">return</span> mMpegSynth;</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  }</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  </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> </div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> }</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div>
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