Mercurial > sdl-ios-xcode

annotate src/cdrom/macosx/AudioFilePlayer.c @ 4142:4433ef2a1802 SDL-1.2

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We probably want to still do this for fullscreen surfaces, since we may be clearing the edges of a centered video mode or garbage left over from a mode switch.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 29 Feb 2008 14:01:45 +0000
parents 4d66375c2012
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
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, 1998, 1999, 2000, 2001, 2002 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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18
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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
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27 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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28 AudioFilePlayer.cpp
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29 */
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30 #include "AudioFilePlayer.h"
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31
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32 /*
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33 void ThrowResult (OSStatus result, const char* str)
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34 {
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35 SDL_SetError ("Error: %s %d", str, result);
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36 throw result;
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37 }
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38 */
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39
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40 #if DEBUG
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41 static void PrintStreamDesc (AudioStreamBasicDescription *inDesc)
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42 {
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43 if (!inDesc) {
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44 printf ("Can't print a NULL desc!\n");
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45 return;
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46 }
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47
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48 printf ("- - - - - - - - - - - - - - - - - - - -\n");
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49 printf (" Sample Rate:%f\n", inDesc->mSampleRate);
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50 printf (" Format ID:%s\n", (char*)&inDesc->mFormatID);
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51 printf (" Format Flags:%lX\n", inDesc->mFormatFlags);
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52 printf (" Bytes per Packet:%ld\n", inDesc->mBytesPerPacket);
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53 printf (" Frames per Packet:%ld\n", inDesc->mFramesPerPacket);
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54 printf (" Bytes per Frame:%ld\n", inDesc->mBytesPerFrame);
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55 printf (" Channels per Frame:%ld\n", inDesc->mChannelsPerFrame);
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56 printf (" Bits per Channel:%ld\n", inDesc->mBitsPerChannel);
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57 printf ("- - - - - - - - - - - - - - - - - - - -\n");
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58 }
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59 #endif
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60
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61
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62 static int AudioFilePlayer_SetDestination (AudioFilePlayer *afp, AudioUnit *inDestUnit)
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63 {
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64 /*if (afp->mConnected) throw static_cast<OSStatus>(-1);*/ /* can't set dest if already engaged */
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65 if (afp->mConnected)
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66 return 0 ;
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67
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68 SDL_memcpy(&afp->mPlayUnit, inDestUnit, sizeof (afp->mPlayUnit));
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69
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70 OSStatus result = noErr;
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71
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72
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73 /* we can "down" cast a component instance to a component */
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74 ComponentDescription desc;
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75 result = GetComponentInfo ((Component)*inDestUnit, &desc, 0, 0, 0);
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76 if (result) return 0; /*THROW_RESULT("GetComponentInfo")*/
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77
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78 /* we're going to use this to know which convert routine to call
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79 a v1 audio unit will have a type of 'aunt'
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80 a v2 audio unit will have one of several different types. */
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81 if (desc.componentType != kAudioUnitComponentType) {
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82 result = badComponentInstance;
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83 /*THROW_RESULT("BAD COMPONENT")*/
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84 if (result) return 0;
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85 }
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86
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87 /* Set the input format of the audio unit. */
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88 result = AudioUnitSetProperty (*inDestUnit,
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89 kAudioUnitProperty_StreamFormat,
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90 kAudioUnitScope_Input,
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91 0,
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92 &afp->mFileDescription,
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93 sizeof (afp->mFileDescription));
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94 /*THROW_RESULT("AudioUnitSetProperty")*/
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95 if (result) return 0;
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96 return 1;
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97 }
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98
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99 static void AudioFilePlayer_SetNotifier(AudioFilePlayer *afp, AudioFilePlayNotifier inNotifier, void *inRefCon)
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100 {
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101 afp->mNotifier = inNotifier;
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102 afp->mRefCon = inRefCon;
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103 }
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104
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105 static int AudioFilePlayer_IsConnected(AudioFilePlayer *afp)
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106 {
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107 return afp->mConnected;
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108 }
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109
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110 static AudioUnit AudioFilePlayer_GetDestUnit(AudioFilePlayer *afp)
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111 {
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112 return afp->mPlayUnit;
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113 }
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114
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115 static void AudioFilePlayer_Print(AudioFilePlayer *afp)
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116 {
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117 #if DEBUG
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118 printf ("Is Connected:%s\n", (IsConnected() ? "true" : "false"));
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119 printf ("- - - - - - - - - - - - - - \n");
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120 #endif
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121 }
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122
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123 static void AudioFilePlayer_SetStartFrame (AudioFilePlayer *afp, int frame)
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124 {
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125 SInt64 position = frame * 2352;
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126
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127 afp->mStartFrame = frame;
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128 afp->mAudioFileManager->SetPosition (afp->mAudioFileManager, position);
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129 }
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130
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131
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132 static int AudioFilePlayer_GetCurrentFrame (AudioFilePlayer *afp)
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133 {
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134 return afp->mStartFrame + (afp->mAudioFileManager->GetByteCounter(afp->mAudioFileManager) / 2352);
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135 }
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136
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137 static void AudioFilePlayer_SetStopFrame (AudioFilePlayer *afp, int frame)
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138 {
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139 SInt64 position = frame * 2352;
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140
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141 afp->mAudioFileManager->SetEndOfFile (afp->mAudioFileManager, position);
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142 }
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143
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144 void delete_AudioFilePlayer(AudioFilePlayer *afp)
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145 {
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146 if (afp != NULL)
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147 {
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148 afp->Disconnect(afp);
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149
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150 if (afp->mAudioFileManager) {
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151 delete_AudioFileManager(afp->mAudioFileManager);
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152 afp->mAudioFileManager = 0;
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153 }
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154
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155 if (afp->mForkRefNum) {
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156 FSCloseFork (afp->mForkRefNum);
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157 afp->mForkRefNum = 0;
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158 }
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159 SDL_free(afp);
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160 }
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161 }
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162
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163 static int AudioFilePlayer_Connect(AudioFilePlayer *afp)
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164 {
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165 #if DEBUG
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166 printf ("Connect:%x, engaged=%d\n", (int)afp->mPlayUnit, (afp->mConnected ? 1 : 0));
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167 #endif
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168 if (!afp->mConnected)
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169 {
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170 if (!afp->mAudioFileManager->DoConnect(afp->mAudioFileManager))
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171 return 0;
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172
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173 /* set the render callback for the file data to be supplied to the sound converter AU */
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174 afp->mInputCallback.inputProc = afp->mAudioFileManager->FileInputProc;
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175 afp->mInputCallback.inputProcRefCon = afp->mAudioFileManager;
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176
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177 OSStatus result = AudioUnitSetProperty (afp->mPlayUnit,
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178 kAudioUnitProperty_SetInputCallback,
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179 kAudioUnitScope_Input,
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180 0,
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181 &afp->mInputCallback,
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182 sizeof(afp->mInputCallback));
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183 if (result) return 0; /*THROW_RESULT("AudioUnitSetProperty")*/
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184 afp->mConnected = 1;
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185 }
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186
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187 return 1;
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188 }
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189
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190 /* warning noted, now please go away ;-) */
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191 /* #warning This should redirect the calling of notification code to some other thread */
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192 static void AudioFilePlayer_DoNotification (AudioFilePlayer *afp, OSStatus inStatus)
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193 {
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194 if (afp->mNotifier) {
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195 (*afp->mNotifier) (afp->mRefCon, inStatus);
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196 } else {
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197 SDL_SetError ("Notification posted with no notifier in place");
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198
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199 if (inStatus == kAudioFilePlay_FileIsFinished)
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200 afp->Disconnect(afp);
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201 else if (inStatus != kAudioFilePlayErr_FilePlayUnderrun)
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202 afp->Disconnect(afp);
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203 }
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204 }
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205
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206 static void AudioFilePlayer_Disconnect (AudioFilePlayer *afp)
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207 {
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208 #if DEBUG
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209 printf ("Disconnect:%x,%ld, engaged=%d\n", (int)afp->mPlayUnit, 0, (afp->mConnected ? 1 : 0));
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210 #endif
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211 if (afp->mConnected)
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212 {
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213 afp->mConnected = 0;
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214
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215 afp->mInputCallback.inputProc = 0;
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216 afp->mInputCallback.inputProcRefCon = 0;
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217 OSStatus result = AudioUnitSetProperty (afp->mPlayUnit,
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218 kAudioUnitProperty_SetInputCallback,
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219 kAudioUnitScope_Input,
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220 0,
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221 &afp->mInputCallback,
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222 sizeof(afp->mInputCallback));
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223 if (result)
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224 SDL_SetError ("AudioUnitSetProperty:RemoveInputCallback:%ld", result);
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225
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226 afp->mAudioFileManager->Disconnect(afp->mAudioFileManager);
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227 }
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228 }
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229
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230 typedef struct {
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231 UInt32 offset;
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232 UInt32 blockSize;
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233 } SSNDData;
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234
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235 static int AudioFilePlayer_OpenFile (AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileDataSize)
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236 {
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237 ContainerChunk chunkHeader;
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238 ChunkHeader chunk;
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239 SSNDData ssndData;
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240
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241 OSErr result;
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242 HFSUniStr255 dfName;
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243 ByteCount actual;
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244 SInt64 offset;
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245
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246 /* Open the data fork of the input file */
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247 result = FSGetDataForkName(&dfName);
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248 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSGetDataForkName")*/
1143
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249
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250 result = FSOpenFork(inRef, dfName.length, dfName.unicode, fsRdPerm, &afp->mForkRefNum);
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251 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSOpenFork")*/
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252
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253 /* Read the file header, and check if it's indeed an AIFC file */
1143
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254 result = FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(chunkHeader), &chunkHeader, &actual);
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255 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")*/
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256
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257 if (chunkHeader.ckID != 'FORM') {
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258 result = -1;
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259 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): chunk id is not 'FORM'");*/
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260 }
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261
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262 if (chunkHeader.formType != 'AIFC') {
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263 result = -1;
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264 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): file format is not 'AIFC'");*/
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265 }
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266
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267 /* Search for the SSND chunk. We ignore all compression etc. information
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268 in other chunks. Of course that is kind of evil, but for now we are lazy
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269 and rely on the cdfs to always give us the same fixed format.
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270 TODO: Parse the COMM chunk we currently skip to fill in mFileDescription.
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271 */
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272 offset = 0;
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273 do {
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274 result = FSReadFork(afp->mForkRefNum, fsFromMark, offset, sizeof(chunk), &chunk, &actual);
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275 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")*/
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276
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277 /* Skip the chunk data */
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278 offset = chunk.ckSize;
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279 } while (chunk.ckID != 'SSND');
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280
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281 /* Read the header of the SSND chunk. After this, we are positioned right
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282 at the start of the audio data. */
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283 result = FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(ssndData), &ssndData, &actual);
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284 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")*/
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285
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286 result = FSSetForkPosition(afp->mForkRefNum, fsFromMark, ssndData.offset);
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287 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSSetForkPosition")*/
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288
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289 /* Data size */
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290 *outFileDataSize = chunk.ckSize - ssndData.offset - 8;
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291
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292 /* File format */
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293 afp->mFileDescription.mSampleRate = 44100;
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294 afp->mFileDescription.mFormatID = kAudioFormatLinearPCM;
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295 afp->mFileDescription.mFormatFlags = kLinearPCMFormatFlagIsPacked | kLinearPCMFormatFlagIsSignedInteger;
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296 afp->mFileDescription.mBytesPerPacket = 4;
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297 afp->mFileDescription.mFramesPerPacket = 1;
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298 afp->mFileDescription.mBytesPerFrame = 4;
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299 afp->mFileDescription.mChannelsPerFrame = 2;
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300 afp->mFileDescription.mBitsPerChannel = 16;
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301
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302 return 1;
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303 }
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304
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305 AudioFilePlayer *new_AudioFilePlayer (const FSRef *inFileRef)
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306 {
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307 SInt64 fileDataSize = 0;
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308
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309 AudioFilePlayer *afp = (AudioFilePlayer *) SDL_malloc(sizeof (AudioFilePlayer));
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310 if (afp == NULL)
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311 return NULL;
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312 SDL_memset(afp, '\0', sizeof (*afp));
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313
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314 #define SET_AUDIOFILEPLAYER_METHOD(m) afp->m = AudioFilePlayer_##m
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315 SET_AUDIOFILEPLAYER_METHOD(SetDestination);
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316 SET_AUDIOFILEPLAYER_METHOD(SetNotifier);
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317 SET_AUDIOFILEPLAYER_METHOD(SetStartFrame);
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318 SET_AUDIOFILEPLAYER_METHOD(GetCurrentFrame);
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319 SET_AUDIOFILEPLAYER_METHOD(SetStopFrame);
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320 SET_AUDIOFILEPLAYER_METHOD(Connect);
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321 SET_AUDIOFILEPLAYER_METHOD(Disconnect);
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322 SET_AUDIOFILEPLAYER_METHOD(DoNotification);
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323 SET_AUDIOFILEPLAYER_METHOD(IsConnected);
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324 SET_AUDIOFILEPLAYER_METHOD(GetDestUnit);
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325 SET_AUDIOFILEPLAYER_METHOD(Print);
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326 SET_AUDIOFILEPLAYER_METHOD(OpenFile);
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327 #undef SET_AUDIOFILEPLAYER_METHOD
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328
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329 if (!afp->OpenFile (afp, inFileRef, &fileDataSize))
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330 {
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331 SDL_free(afp);
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332 return NULL;
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333 }
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334
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335 /* we want about 4 seconds worth of data for the buffer */
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336 int bytesPerSecond = (UInt32) (4 * afp->mFileDescription.mSampleRate * afp->mFileDescription.mBytesPerFrame);
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337
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338 #if DEBUG
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339 printf("File format:\n");
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340 PrintStreamDesc (&afp->mFileDescription);
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341 #endif
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342
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343 afp->mAudioFileManager = new_AudioFileManager(afp, afp->mForkRefNum,
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344 fileDataSize,
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345 bytesPerSecond);
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346 if (afp->mAudioFileManager == NULL)
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347 {
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348 delete_AudioFilePlayer(afp);
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349 return NULL;
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350 }
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351
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352 return afp;
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353 }
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354