Mercurial > sdl-ios-xcode

annotate src/cdrom/macosx/AudioFilePlayer.c @ 4227:c5ee6a0d7916 SDL-1.2

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Fix for expression error by Torsten Giebl - Thanks! :)
author Sam Lantinga <slouken@libsdl.org>
date Mon, 21 Sep 2009 11:48:03 +0000
parents 386181851388
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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19 Sam Lantinga
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20 slouken@libsdl.org
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21
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22 This file based on Apple sample code. We haven't changed the file name,
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23 so if you want to see the original search for it on apple.com/developer
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24 */
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25 #include "SDL_config.h"
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26 #include "SDL_endian.h"
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27
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28 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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29 AudioFilePlayer.cpp
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30 */
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31 #include "AudioFilePlayer.h"
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32
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33 /*
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34 void ThrowResult (OSStatus result, const char* str)
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35 {
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36 SDL_SetError ("Error: %s %d", str, result);
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37 throw result;
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38 }
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39 */
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40
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41 #if DEBUG
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42 static void PrintStreamDesc (AudioStreamBasicDescription *inDesc)
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43 {
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44 if (!inDesc) {
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45 printf ("Can't print a NULL desc!\n");
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46 return;
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47 }
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48
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49 printf ("- - - - - - - - - - - - - - - - - - - -\n");
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50 printf (" Sample Rate:%f\n", inDesc->mSampleRate);
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51 printf (" Format ID:%s\n", (char*)&inDesc->mFormatID);
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52 printf (" Format Flags:%lX\n", inDesc->mFormatFlags);
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53 printf (" Bytes per Packet:%ld\n", inDesc->mBytesPerPacket);
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54 printf (" Frames per Packet:%ld\n", inDesc->mFramesPerPacket);
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55 printf (" Bytes per Frame:%ld\n", inDesc->mBytesPerFrame);
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56 printf (" Channels per Frame:%ld\n", inDesc->mChannelsPerFrame);
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57 printf (" Bits per Channel:%ld\n", inDesc->mBitsPerChannel);
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58 printf ("- - - - - - - - - - - - - - - - - - - -\n");
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59 }
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60 #endif
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61
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62
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63 static int AudioFilePlayer_SetDestination (AudioFilePlayer *afp, AudioUnit *inDestUnit)
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64 {
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65 /*if (afp->mConnected) throw static_cast<OSStatus>(-1);*/ /* can't set dest if already engaged */
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66 if (afp->mConnected)
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67 return 0 ;
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68
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69 SDL_memcpy(&afp->mPlayUnit, inDestUnit, sizeof (afp->mPlayUnit));
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70
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71 OSStatus result = noErr;
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72
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73
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74 /* we can "down" cast a component instance to a component */
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75 ComponentDescription desc;
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76 result = GetComponentInfo ((Component)*inDestUnit, &desc, 0, 0, 0);
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77 if (result) return 0; /*THROW_RESULT("GetComponentInfo")*/
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78
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79 /* we're going to use this to know which convert routine to call
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80 a v1 audio unit will have a type of 'aunt'
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81 a v2 audio unit will have one of several different types. */
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82 if (desc.componentType != kAudioUnitType_Output) {
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83 result = badComponentInstance;
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84 /*THROW_RESULT("BAD COMPONENT")*/
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85 if (result) return 0;
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86 }
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87
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88 /* Set the input format of the audio unit. */
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89 result = AudioUnitSetProperty (*inDestUnit,
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90 kAudioUnitProperty_StreamFormat,
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91 kAudioUnitScope_Input,
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92 0,
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93 &afp->mFileDescription,
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94 sizeof (afp->mFileDescription));
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95 /*THROW_RESULT("AudioUnitSetProperty")*/
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96 if (result) return 0;
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97 return 1;
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98 }
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99
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100 static void AudioFilePlayer_SetNotifier(AudioFilePlayer *afp, AudioFilePlayNotifier inNotifier, void *inRefCon)
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101 {
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102 afp->mNotifier = inNotifier;
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103 afp->mRefCon = inRefCon;
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104 }
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105
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106 static int AudioFilePlayer_IsConnected(AudioFilePlayer *afp)
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107 {
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108 return afp->mConnected;
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109 }
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110
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111 static AudioUnit AudioFilePlayer_GetDestUnit(AudioFilePlayer *afp)
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112 {
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113 return afp->mPlayUnit;
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114 }
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115
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116 static void AudioFilePlayer_Print(AudioFilePlayer *afp)
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117 {
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118 #if DEBUG
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119 printf ("Is Connected:%s\n", (IsConnected() ? "true" : "false"));
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120 printf ("- - - - - - - - - - - - - - \n");
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121 #endif
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122 }
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123
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124 static void AudioFilePlayer_SetStartFrame (AudioFilePlayer *afp, int frame)
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125 {
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126 SInt64 position = frame * 2352;
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127
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128 afp->mStartFrame = frame;
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129 afp->mAudioFileManager->SetPosition (afp->mAudioFileManager, position);
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130 }
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131
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132
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133 static int AudioFilePlayer_GetCurrentFrame (AudioFilePlayer *afp)
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134 {
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135 return afp->mStartFrame + (afp->mAudioFileManager->GetByteCounter(afp->mAudioFileManager) / 2352);
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136 }
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137
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138 static void AudioFilePlayer_SetStopFrame (AudioFilePlayer *afp, int frame)
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139 {
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140 SInt64 position = frame * 2352;
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141
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142 afp->mAudioFileManager->SetEndOfFile (afp->mAudioFileManager, position);
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143 }
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144
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145 void delete_AudioFilePlayer(AudioFilePlayer *afp)
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146 {
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147 if (afp != NULL)
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148 {
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149 afp->Disconnect(afp);
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150
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151 if (afp->mAudioFileManager) {
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152 delete_AudioFileManager(afp->mAudioFileManager);
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153 afp->mAudioFileManager = 0;
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154 }
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155
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156 if (afp->mForkRefNum) {
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157 FSCloseFork (afp->mForkRefNum);
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158 afp->mForkRefNum = 0;
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159 }
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160 SDL_free(afp);
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161 }
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162 }
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163
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164 static int AudioFilePlayer_Connect(AudioFilePlayer *afp)
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165 {
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166 #if DEBUG
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167 printf ("Connect:%x, engaged=%d\n", (int)afp->mPlayUnit, (afp->mConnected ? 1 : 0));
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168 #endif
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169 if (!afp->mConnected)
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170 {
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171 if (!afp->mAudioFileManager->DoConnect(afp->mAudioFileManager))
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172 return 0;
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173
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174 /* set the render callback for the file data to be supplied to the sound converter AU */
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175 afp->mInputCallback.inputProc = afp->mAudioFileManager->FileInputProc;
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176 afp->mInputCallback.inputProcRefCon = afp->mAudioFileManager;
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177
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178 OSStatus result = AudioUnitSetProperty (afp->mPlayUnit,
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179 kAudioUnitProperty_SetRenderCallback,
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180 kAudioUnitScope_Input,
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181 0,
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182 &afp->mInputCallback,
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183 sizeof(afp->mInputCallback));
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184 if (result) return 0; /*THROW_RESULT("AudioUnitSetProperty")*/
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185 afp->mConnected = 1;
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186 }
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187
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188 return 1;
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189 }
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190
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191 /* warning noted, now please go away ;-) */
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192 /* #warning This should redirect the calling of notification code to some other thread */
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193 static void AudioFilePlayer_DoNotification (AudioFilePlayer *afp, OSStatus inStatus)
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194 {
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195 if (afp->mNotifier) {
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196 (*afp->mNotifier) (afp->mRefCon, inStatus);
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197 } else {
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198 SDL_SetError ("Notification posted with no notifier in place");
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199
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200 if (inStatus == kAudioFilePlay_FileIsFinished)
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201 afp->Disconnect(afp);
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202 else if (inStatus != kAudioFilePlayErr_FilePlayUnderrun)
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203 afp->Disconnect(afp);
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204 }
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205 }
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206
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207 static void AudioFilePlayer_Disconnect (AudioFilePlayer *afp)
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208 {
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209 #if DEBUG
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210 printf ("Disconnect:%x,%ld, engaged=%d\n", (int)afp->mPlayUnit, 0, (afp->mConnected ? 1 : 0));
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211 #endif
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212 if (afp->mConnected)
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213 {
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214 afp->mConnected = 0;
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215
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216 afp->mInputCallback.inputProc = 0;
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217 afp->mInputCallback.inputProcRefCon = 0;
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218 OSStatus result = AudioUnitSetProperty (afp->mPlayUnit,
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219 kAudioUnitProperty_SetRenderCallback,
1143
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220 kAudioUnitScope_Input,
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221 0,
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222 &afp->mInputCallback,
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223 sizeof(afp->mInputCallback));
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224 if (result)
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225 SDL_SetError ("AudioUnitSetProperty:RemoveInputCallback:%ld", result);
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226
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227 afp->mAudioFileManager->Disconnect(afp->mAudioFileManager);
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228 }
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229 }
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230
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231 typedef struct {
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232 UInt32 offset;
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233 UInt32 blockSize;
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234 } SSNDData;
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235
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236 static int AudioFilePlayer_OpenFile (AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileDataSize)
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237 {
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238 ContainerChunk chunkHeader;
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diff changeset
239 ChunkHeader chunk;
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240 SSNDData ssndData;
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241
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242 OSErr result;
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243 HFSUniStr255 dfName;
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244 ByteCount actual;
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245 SInt64 offset;
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246
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247 /* Open the data fork of the input file */
1143
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248 result = FSGetDataForkName(&dfName);
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249 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSGetDataForkName")*/
1143
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250
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251 result = FSOpenFork(inRef, dfName.length, dfName.unicode, fsRdPerm, &afp->mForkRefNum);
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252 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSOpenFork")*/
1143
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253
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254 /* Read the file header, and check if it's indeed an AIFC file */
1143
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255 result = FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(chunkHeader), &chunkHeader, &actual);
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256 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")*/
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257
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258 if (SDL_SwapBE32(chunkHeader.ckID) != 'FORM') {
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259 result = -1;
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260 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): chunk id is not 'FORM'");*/
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261 }
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262
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263 if (SDL_SwapBE32(chunkHeader.formType) != 'AIFC') {
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264 result = -1;
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265 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): file format is not 'AIFC'");*/
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266 }
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267
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268 /* Search for the SSND chunk. We ignore all compression etc. information
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269 in other chunks. Of course that is kind of evil, but for now we are lazy
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270 and rely on the cdfs to always give us the same fixed format.
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271 TODO: Parse the COMM chunk we currently skip to fill in mFileDescription.
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272 */
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273 offset = 0;
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274 do {
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275 result = FSReadFork(afp->mForkRefNum, fsFromMark, offset, sizeof(chunk), &chunk, &actual);
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276 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")*/
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277
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278 chunk.ckID = SDL_SwapBE32(chunk.ckID);
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279 chunk.ckSize = SDL_SwapBE32(chunk.ckSize);
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280
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281 /* Skip the chunk data */
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282 offset = chunk.ckSize;
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283 } while (chunk.ckID != 'SSND');
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284
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285 /* Read the header of the SSND chunk. After this, we are positioned right
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286 at the start of the audio data. */
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287 result = FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(ssndData), &ssndData, &actual);
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288 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")*/
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289
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290 ssndData.offset = SDL_SwapBE32(ssndData.offset);
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291
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292 result = FSSetForkPosition(afp->mForkRefNum, fsFromMark, ssndData.offset);
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293 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSSetForkPosition")*/
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294
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295 /* Data size */
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296 *outFileDataSize = chunk.ckSize - ssndData.offset - 8;
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297
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298 /* File format */
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299 afp->mFileDescription.mSampleRate = 44100;
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300 afp->mFileDescription.mFormatID = kAudioFormatLinearPCM;
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301 afp->mFileDescription.mFormatFlags = kLinearPCMFormatFlagIsPacked | kLinearPCMFormatFlagIsSignedInteger;
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302 afp->mFileDescription.mBytesPerPacket = 4;
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303 afp->mFileDescription.mFramesPerPacket = 1;
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304 afp->mFileDescription.mBytesPerFrame = 4;
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305 afp->mFileDescription.mChannelsPerFrame = 2;
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306 afp->mFileDescription.mBitsPerChannel = 16;
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307
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308 return 1;
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309 }
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310
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311 AudioFilePlayer *new_AudioFilePlayer (const FSRef *inFileRef)
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312 {
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313 SInt64 fileDataSize = 0;
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314
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315 AudioFilePlayer *afp = (AudioFilePlayer *) SDL_malloc(sizeof (AudioFilePlayer));
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316 if (afp == NULL)
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317 return NULL;
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318 SDL_memset(afp, '\0', sizeof (*afp));
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319
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320 #define SET_AUDIOFILEPLAYER_METHOD(m) afp->m = AudioFilePlayer_##m
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321 SET_AUDIOFILEPLAYER_METHOD(SetDestination);
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322 SET_AUDIOFILEPLAYER_METHOD(SetNotifier);
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323 SET_AUDIOFILEPLAYER_METHOD(SetStartFrame);
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324 SET_AUDIOFILEPLAYER_METHOD(GetCurrentFrame);
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325 SET_AUDIOFILEPLAYER_METHOD(SetStopFrame);
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326 SET_AUDIOFILEPLAYER_METHOD(Connect);
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327 SET_AUDIOFILEPLAYER_METHOD(Disconnect);
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328 SET_AUDIOFILEPLAYER_METHOD(DoNotification);
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329 SET_AUDIOFILEPLAYER_METHOD(IsConnected);
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330 SET_AUDIOFILEPLAYER_METHOD(GetDestUnit);
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331 SET_AUDIOFILEPLAYER_METHOD(Print);
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332 SET_AUDIOFILEPLAYER_METHOD(OpenFile);
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333 #undef SET_AUDIOFILEPLAYER_METHOD
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334
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335 if (!afp->OpenFile (afp, inFileRef, &fileDataSize))
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336 {
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337 SDL_free(afp);
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338 return NULL;
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339 }
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340
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341 /* we want about 4 seconds worth of data for the buffer */
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342 int bytesPerSecond = (UInt32) (4 * afp->mFileDescription.mSampleRate * afp->mFileDescription.mBytesPerFrame);
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343
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344 #if DEBUG
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345 printf("File format:\n");
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346 PrintStreamDesc (&afp->mFileDescription);
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347 #endif
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348
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349 afp->mAudioFileManager = new_AudioFileManager(afp, afp->mForkRefNum,
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350 fileDataSize,
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351 bytesPerSecond);
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352 if (afp->mAudioFileManager == NULL)
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353 {
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354 delete_AudioFilePlayer(afp);
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355 return NULL;
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356 }
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357
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358 return afp;
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diff changeset
359 }
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360