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annotate docs/html/sdlloadwav.html @ 3116:b17f1ae7ad66

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Added support for single buffering, if double buffering is not available.
author Mike Gorchak <lestat@i.com.ua>
date Tue, 05 May 2009 17:50:34 +0000
parents 355632dca928
children
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1 <HTML
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2 ><HEAD
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3 ><TITLE
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4 >SDL_LoadWAV</TITLE
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5 ><META
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6 NAME="GENERATOR"
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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8 "><LINK
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9 REL="HOME"
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10 TITLE="SDL Library Documentation"
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11 HREF="index.html"><LINK
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12 REL="UP"
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13 TITLE="Audio"
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14 HREF="audio.html"><LINK
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15 REL="PREVIOUS"
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16 TITLE="SDL_GetAudioStatus"
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17 HREF="sdlgetaudiostatus.html"><LINK
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18 REL="NEXT"
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19 TITLE="SDL_FreeWAV"
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20 HREF="sdlfreewav.html"></HEAD
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21 ><BODY
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22 CLASS="REFENTRY"
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23 BGCOLOR="#FFF8DC"
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24 TEXT="#000000"
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25 LINK="#0000ee"
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26 VLINK="#551a8b"
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27 ALINK="#ff0000"
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28 ><DIV
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29 CLASS="NAVHEADER"
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30 ><TABLE
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31 SUMMARY="Header navigation table"
0
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32 WIDTH="100%"
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33 BORDER="0"
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34 CELLPADDING="0"
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35 CELLSPACING="0"
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36 ><TR
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37 ><TH
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38 COLSPAN="3"
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39 ALIGN="center"
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40 >SDL Library Documentation</TH
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41 ></TR
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42 ><TR
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43 ><TD
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44 WIDTH="10%"
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45 ALIGN="left"
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46 VALIGN="bottom"
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47 ><A
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48 HREF="sdlgetaudiostatus.html"
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49 ACCESSKEY="P"
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50 >Prev</A
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51 ></TD
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52 ><TD
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53 WIDTH="80%"
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54 ALIGN="center"
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55 VALIGN="bottom"
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56 ></TD
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57 ><TD
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58 WIDTH="10%"
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59 ALIGN="right"
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60 VALIGN="bottom"
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61 ><A
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62 HREF="sdlfreewav.html"
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63 ACCESSKEY="N"
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64 >Next</A
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65 ></TD
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66 ></TR
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67 ></TABLE
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68 ><HR
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69 ALIGN="LEFT"
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70 WIDTH="100%"></DIV
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71 ><H1
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72 ><A
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73 NAME="SDLLOADWAV"
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74 ></A
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75 >SDL_LoadWAV</H1
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76 ><DIV
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77 CLASS="REFNAMEDIV"
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78 ><A
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79 NAME="AEN6816"
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80 ></A
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81 ><H2
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82 >Name</H2
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83 >SDL_LoadWAV&nbsp;--&nbsp;Load a WAVE file</DIV
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84 ><DIV
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85 CLASS="REFSYNOPSISDIV"
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86 ><A
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87 NAME="AEN6819"
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88 ></A
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89 ><H2
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90 >Synopsis</H2
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91 ><DIV
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92 CLASS="FUNCSYNOPSIS"
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93 ><A
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94 NAME="AEN6820"
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95 ></A
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96 ><P
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97 ></P
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98 ><PRE
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99 CLASS="FUNCSYNOPSISINFO"
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100 >#include "SDL.h"</PRE
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101 ><P
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102 ><CODE
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103 ><CODE
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104 CLASS="FUNCDEF"
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105 >SDL_AudioSpec *<B
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106 CLASS="FSFUNC"
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107 >SDL_LoadWAV</B
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108 ></CODE
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109 >(const char *file, SDL_AudioSpec *spec, Uint8 **audio_buf, Uint32 *audio_len);</CODE
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110 ></P
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111 ><P
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112 ></P
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113 ></DIV
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114 ></DIV
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115 ><DIV
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116 CLASS="REFSECT1"
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117 ><A
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118 NAME="AEN6826"
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119 ></A
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120 ><H2
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121 >Description</H2
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122 ><P
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123 ><TT
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124 CLASS="FUNCTION"
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125 >SDL_LoadWAV</TT
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126 >
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127 This function loads a WAVE <TT
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128 CLASS="PARAMETER"
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129 ><I
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130 >file</I
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131 ></TT
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132 > into memory.</P
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133 ><P
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134 >If this function succeeds, it returns the given
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135 <A
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136 HREF="sdlaudiospec.html"
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137 ><TT
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138 CLASS="FUNCTION"
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139 >SDL_AudioSpec</TT
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140 ></A
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141 >,
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142 filled with the audio data format of the wave data, and sets
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143 <TT
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144 CLASS="PARAMETER"
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145 ><I
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146 >audio_buf</I
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147 ></TT
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148 > to a <TT
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149 CLASS="FUNCTION"
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150 >malloc</TT
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151 >'d
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152 buffer containing the audio data, and sets <TT
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153 CLASS="PARAMETER"
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154 ><I
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155 >audio_len</I
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156 ></TT
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157 >
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158 to the length of that audio buffer, in bytes. You need to free the audio
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159 buffer with <A
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160 HREF="sdlfreewav.html"
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161 ><TT
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162 CLASS="FUNCTION"
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163 >SDL_FreeWAV</TT
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164 ></A
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165 > when you are
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166 done with it.</P
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167 ><P
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168 >This function returns <TT
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169 CLASS="LITERAL"
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170 >NULL</TT
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171 > and sets the SDL
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172 error message if the wave file cannot be opened, uses an unknown data format,
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173 or is corrupt. Currently raw, MS-ADPCM and IMA-ADPCM WAVE files are supported.</P
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174 ></DIV
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175 ><DIV
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176 CLASS="REFSECT1"
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177 ><A
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178 NAME="AEN6841"
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179 ></A
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180 ><H2
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181 >Example</H2
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182 ><PRE
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183 CLASS="PROGRAMLISTING"
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184 >SDL_AudioSpec wav_spec;
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185 Uint32 wav_length;
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186 Uint8 *wav_buffer;
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187
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188 /* Load the WAV */
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189 if( SDL_LoadWAV("test.wav", &#38;wav_spec, &#38;wav_buffer, &#38;wav_length) == NULL ){
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190 fprintf(stderr, "Could not open test.wav: %s\n", SDL_GetError());
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191 exit(-1);
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192 }
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193 .
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194 .
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195 .
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196 /* Do stuff with the WAV */
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197 .
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198 .
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199 /* Free It */
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200 SDL_FreeWAV(wav_buffer);</PRE
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201 ></DIV
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202 ><DIV
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203 CLASS="REFSECT1"
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204 ><A
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205 NAME="AEN6844"
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206 ></A
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207 ><H2
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208 >See Also</H2
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209 ><P
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210 ><A
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211 HREF="sdlaudiospec.html"
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212 ><SPAN
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213 CLASS="STRUCTNAME"
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214 >SDL_AudioSpec</SPAN
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215 ></A
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216 >,
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217 <A
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218 HREF="sdlopenaudio.html"
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219 ><TT
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220 CLASS="FUNCTION"
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221 >SDL_OpenAudio</TT
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222 ></A
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223 >,
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224 <A
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225 HREF="sdlfreewav.html"
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226 ><TT
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227 CLASS="FUNCTION"
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228 >SDL_FreeWAV</TT
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229 ></A
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230 ></P
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231 ></DIV
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232 ><DIV
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233 CLASS="NAVFOOTER"
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234 ><HR
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235 ALIGN="LEFT"
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236 WIDTH="100%"><TABLE
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237 SUMMARY="Footer navigation table"
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238 WIDTH="100%"
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239 BORDER="0"
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240 CELLPADDING="0"
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241 CELLSPACING="0"
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242 ><TR
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243 ><TD
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244 WIDTH="33%"
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245 ALIGN="left"
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246 VALIGN="top"
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247 ><A
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248 HREF="sdlgetaudiostatus.html"
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249 ACCESSKEY="P"
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250 >Prev</A
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251 ></TD
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252 ><TD
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253 WIDTH="34%"
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254 ALIGN="center"
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255 VALIGN="top"
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256 ><A
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257 HREF="index.html"
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258 ACCESSKEY="H"
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259 >Home</A
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260 ></TD
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261 ><TD
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262 WIDTH="33%"
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263 ALIGN="right"
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264 VALIGN="top"
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265 ><A
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266 HREF="sdlfreewav.html"
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267 ACCESSKEY="N"
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268 >Next</A
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269 ></TD
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270 ></TR
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271 ><TR
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272 ><TD
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273 WIDTH="33%"
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274 ALIGN="left"
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275 VALIGN="top"
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276 >SDL_GetAudioStatus</TD
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277 ><TD
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278 WIDTH="34%"
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279 ALIGN="center"
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280 VALIGN="top"
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281 ><A
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282 HREF="audio.html"
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283 ACCESSKEY="U"
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284 >Up</A
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285 ></TD
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286 ><TD
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287 WIDTH="33%"
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288 ALIGN="right"
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289 VALIGN="top"
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290 >SDL_FreeWAV</TD
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291 ></TR
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292 ></TABLE
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293 ></DIV
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294 ></BODY
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295 ></HTML
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296 >