Mercurial > sdl-ios-xcode
annotate src/cdrom/macosx/AudioFilePlayer.c @ 4347:38f22ed3a433 SDL-1.2
Option to fix bug #851
For some people setting the period size works better (and is what SDL 1.2.13 did), but for most people it's the same or worse. You can use an environment variable to pick which one you want.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 17 Oct 2009 06:55:17 +0000 |
parents | 386181851388 |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
4159 | 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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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 #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, |
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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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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 */ |
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248 result = FSGetDataForkName(&dfName); |
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249 if (result) return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSGetDataForkName")*/ |
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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")*/ |
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253 |
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254 /* Read the file header, and check if it's indeed an AIFC file */ |
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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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359 } |
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360 |