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<div class="title">MCIWave.cpp</div> </div>
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<a href="_m_c_i_wave_8cpp.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">/* Project nGenEx</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> Destroyer Studios LLC</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> Copyright © 1997-2004. All Rights Reserved.</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"> SUBSYSTEM: nGenEx.lib</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> FILE: MCIWave.cpp</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> AUTHOR: John DiCamillo</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"></span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> OVERVIEW</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> ========</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> MCI Wave Output stuff</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "<a class="code" href="_mem_debug_8h.html">MemDebug.h</a>"</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "<a class="code" href="_types_8h.html">Types.h</a>"</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// +----------------------------------------------------------------------+</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keywordtype">void</span> <a class="code" href="_list_8inl.html#a76779b0ba1af4da2cfb8cf309b39372b">Print</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* fmt, ...);</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="comment">// +----------------------------------------------------------------------+</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div>
<div class="line"><a name="l00024"></a><span class="lineno"><a class="code" href="_m_c_i_wave_8cpp.html#af75475e22e1888e4cad821e694ed7cca"> 24</a></span> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="_m_c_i_wave_8cpp.html#af75475e22e1888e4cad821e694ed7cca">MCI_MAX_STR</a> = 128;</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">static</span> <span class="keywordtype">char</span> ret_str[<a class="code" href="_m_c_i_wave_8cpp.html#af75475e22e1888e4cad821e694ed7cca">MCI_MAX_STR</a>];</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">static</span> <span class="keywordtype">char</span> err_str[<a class="code" href="_m_c_i_wave_8cpp.html#af75475e22e1888e4cad821e694ed7cca">MCI_MAX_STR</a>];</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">static</span> MCIERROR mci_err;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">static</span> MMRESULT wav_err;</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">extern</span> HWND <a class="code" href="_m_c_i_wave_8cpp.html#a862ca873da95050b2c75d78f854f8582">hwndApp</a>;</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> <span class="keyword">static</span> <span class="keywordtype">int</span> mci_send_string(<span class="keyword">const</span> <span class="keywordtype">char</span>* cmd_str)</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>  mci_err = mciSendString(cmd_str, ret_str, <span class="keyword">sizeof</span>(ret_str), <a class="code" href="_m_c_i_wave_8cpp.html#a862ca873da95050b2c75d78f854f8582">hwndApp</a>);</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keywordflow">if</span> (mci_err) {</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordflow">if</span> (mciGetErrorString(mci_err, err_str, <span class="keyword">sizeof</span>(err_str)))</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <a class="code" href="_list_8inl.html#a76779b0ba1af4da2cfb8cf309b39372b">Print</a>(<span class="stringliteral">"Error (%s): '%s'\n"</span>, cmd_str, err_str);</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <a class="code" href="_list_8inl.html#a76779b0ba1af4da2cfb8cf309b39372b">Print</a>(<span class="stringliteral">"Error (%s): %d - UNKNOWN\n"</span>, cmd_str, mci_err);</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordflow">return</span> 0; </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  }</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">return</span> 1;</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> </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// +--------------------------------------------------------------------+</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keyword">static</span> <span class="keywordtype">void</span> print_wav_error()</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>  waveOutGetErrorText(wav_err, err_str, <a class="code" href="_m_c_i_wave_8cpp.html#af75475e22e1888e4cad821e694ed7cca">MCI_MAX_STR</a>);</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <a class="code" href="_list_8inl.html#a76779b0ba1af4da2cfb8cf309b39372b">Print</a>(err_str);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> }</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// +--------------------------------------------------------------------+</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div>
<div class="line"><a name="l00055"></a><span class="lineno"><a class="code" href="_m_c_i_wave_8h.html#ad0628a9f66f516cdf2f020848de32fc1"> 55</a></span> <span class="keywordtype">int</span> <a class="code" href="_m_c_i_wave_8cpp.html#ad0628a9f66f516cdf2f020848de32fc1">load_wave_file</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* fname, LPWAVEHDR hdr, LPWAVEFORMATEX format)</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> {</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  HMMIO hmmio; <span class="comment">/* file handle for open file */</span> </div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  MMCKINFO mmckinfoParent; <span class="comment">/* parent chunk information structure */</span> </div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  MMCKINFO mmckinfoSubchunk; <span class="comment">/* subchunk information structure */</span> </div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  DWORD dwFmtSize; <span class="comment">/* size of "fmt" chunk */</span> </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  DWORD dwDataSize; <span class="comment">/* size of "data" chunk */</span> </div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">/* </span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * Open the given file for reading with buffered I/O </span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * using the default internal buffer. </span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> */</span> </div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  hmmio = mmioOpen((LPSTR) fname, NULL, MMIO_READ | MMIO_ALLOCBUF); </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>  <span class="keywordflow">if</span> (hmmio == NULL) {</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <a class="code" href="_list_8inl.html#a76779b0ba1af4da2cfb8cf309b39372b">Print</a>(<span class="stringliteral">"load_wave_file(): '%s' - Failed to open file.\n"</span>, fname); </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> 0;</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"> 74</span>  <span class="comment">/* </span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> * Locate a "RIFF" chunk with a "WAVE" form type </span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> * to make sure the file is a WAVE file. </span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> */</span> </div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  mmckinfoParent.fccType = mmioFOURCC(<span class="charliteral">'W'</span>, <span class="charliteral">'A'</span>, <span class="charliteral">'V'</span>, <span class="charliteral">'E'</span>); </div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">if</span> (mmioDescend(hmmio, (LPMMCKINFO) &mmckinfoParent, NULL, MMIO_FINDRIFF)) { </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <a class="code" href="_list_8inl.html#a76779b0ba1af4da2cfb8cf309b39372b">Print</a>(<span class="stringliteral">"load_wave_file(): '%s' - This is not a WAVE file.\n"</span>, fname);</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  mmioClose(hmmio, 0);</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">return</span> 0;</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="comment">/* </span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> * Find the "fmt " chunk (form type "fmt "); it must be </span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> * a subchunk of the "RIFF" parent chunk. </span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"> */</span> </div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  mmckinfoSubchunk.ckid = mmioFOURCC(<span class="charliteral">'f'</span>, <span class="charliteral">'m'</span>, <span class="charliteral">'t'</span>, <span class="charliteral">' '</span>); </div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">if</span> (mmioDescend(hmmio, &mmckinfoSubchunk, &mmckinfoParent, MMIO_FINDCHUNK)) { </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <a class="code" href="_list_8inl.html#a76779b0ba1af4da2cfb8cf309b39372b">Print</a>(<span class="stringliteral">"load_wave_file(): '%s' - WAVE file has no \"fmt\" chunk\n"</span>, fname);</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  mmioClose(hmmio, 0);</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  }</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>  <span class="comment">/* </span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"> * Get the size of the "fmt " chunk--allocate and lock memory for it. </span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> */</span> </div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  dwFmtSize = mmckinfoSubchunk.cksize; </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="comment">/* Read the "fmt " chunk. */</span> </div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">if</span> (mmioRead(hmmio, (HPSTR) format, dwFmtSize) != (LRESULT)dwFmtSize) {</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="_list_8inl.html#a76779b0ba1af4da2cfb8cf309b39372b">Print</a>(<span class="stringliteral">"load_wave_file(): '%s' - Failed to read format chunk.\n"</span>, fname);</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  mmioClose(hmmio, 0);</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">return</span> 0;</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> </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="comment">/* Ascend out of the "fmt " subchunk. */</span> </div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  mmioAscend(hmmio, &mmckinfoSubchunk, 0); </div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="comment">/* </span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> * Find the data subchunk. The current file position </span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> * should be at the beginning of the data chunk. </span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> */</span> </div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  mmckinfoSubchunk.ckid = mmioFOURCC(<span class="charliteral">'d'</span>, <span class="charliteral">'a'</span>, <span class="charliteral">'t'</span>, <span class="charliteral">'a'</span>); </div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">if</span> (mmioDescend(hmmio, &mmckinfoSubchunk, &mmckinfoParent, MMIO_FINDCHUNK)) {</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <a class="code" href="_list_8inl.html#a76779b0ba1af4da2cfb8cf309b39372b">Print</a>(<span class="stringliteral">"load_wave_file(): '%s' - WAVE file has no data chunk.\n"</span>, fname);</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  mmioClose(hmmio, 0); </div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">return</span> 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"> 122</span>  <span class="comment">/* Get the size of the data subchunk. */</span> </div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  dwDataSize = mmckinfoSubchunk.cksize;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">if</span> (dwDataSize == 0L) {</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <a class="code" href="_list_8inl.html#a76779b0ba1af4da2cfb8cf309b39372b">Print</a>(<span class="stringliteral">"load_wave_file(): '%s' - The data chunk contains no data.\n"</span>, fname);</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  mmioClose(hmmio, 0);</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">return</span> 0;</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>  <span class="comment">// allocate the data block:</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  hdr->lpData = (LPSTR) <span class="keyword">new</span>(__FILE__,__LINE__) BYTE[dwDataSize];</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  hdr->dwBufferLength = dwDataSize;</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="comment">/* Read the waveform data subchunk. */</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">if</span> (mmioRead(hmmio, (HPSTR) hdr->lpData, dwDataSize) != (LRESULT)dwDataSize) {</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <a class="code" href="_list_8inl.html#a76779b0ba1af4da2cfb8cf309b39372b">Print</a>(<span class="stringliteral">"load_wave_file(): '%s' - Failed to read data chunk.\n"</span>, fname);</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  mmioClose(hmmio, 0);</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  }</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="comment">/* Close the file. */</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  mmioClose(hmmio, 0);</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="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> }</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment">// +--------------------------------------------------------------------+</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div>
<div class="line"><a name="l00149"></a><span class="lineno"><a class="code" href="_m_c_i_wave_8h.html#a997ce048d79d8254d8266a0de68f827b"> 149</a></span> <span class="keywordtype">void</span> <a class="code" href="_m_c_i_wave_8cpp.html#a997ce048d79d8254d8266a0de68f827b">delete_wave_file</a>(LPWAVEHDR hdr, LPWAVEFORMATEX format)</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> {</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span> (hdr) {</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keyword">delete</span> hdr->lpData;</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  hdr->lpData = 0;</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> }</div>
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