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annotate src/cdrom/macosx/AudioFilePlayer.c @ 1280:f61f045343d3

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Re-query the SDL_WINDOWID each time we initialize the video
author Sam Lantinga <slouken@libsdl.org>
date Sun, 29 Jan 2006 06:11:38 +0000
parents 71a2648acc75
children 3692456e7b0f
rev   line source
1143
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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
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26 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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27 // AudioFilePlayer.cpp
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28 //
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29 #include "AudioFilePlayer.h"
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30
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31 /*
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32 void ThrowResult (OSStatus result, const char* str)
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33 {
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34 SDL_SetError ("Error: %s %d", str, result);
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35 throw result;
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36 }
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37 */
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38
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39 #if DEBUG
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40 static void PrintStreamDesc (AudioStreamBasicDescription *inDesc)
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41 {
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42 if (!inDesc) {
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43 printf ("Can't print a NULL desc!\n");
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44 return;
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45 }
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46
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47 printf ("- - - - - - - - - - - - - - - - - - - -\n");
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48 printf (" Sample Rate:%f\n", inDesc->mSampleRate);
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49 printf (" Format ID:%s\n", (char*)&inDesc->mFormatID);
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50 printf (" Format Flags:%lX\n", inDesc->mFormatFlags);
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51 printf (" Bytes per Packet:%ld\n", inDesc->mBytesPerPacket);
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52 printf (" Frames per Packet:%ld\n", inDesc->mFramesPerPacket);
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53 printf (" Bytes per Frame:%ld\n", inDesc->mBytesPerFrame);
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54 printf (" Channels per Frame:%ld\n", inDesc->mChannelsPerFrame);
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55 printf (" Bits per Channel:%ld\n", inDesc->mBitsPerChannel);
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56 printf ("- - - - - - - - - - - - - - - - - - - -\n");
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57 }
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58 #endif
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59
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60
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61 static int AudioFilePlayer_SetDestination (AudioFilePlayer *afp, AudioUnit *inDestUnit)
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62 {
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63 //if (afp->mConnected) throw static_cast<OSStatus>(-1); //can't set dest if already engaged
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64 if (afp->mConnected)
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65 return 0 ;
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66
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67 memcpy(&afp->mPlayUnit, inDestUnit, sizeof (afp->mPlayUnit));
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68
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69 OSStatus result = noErr;
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70
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71
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72 //we can "down" cast a component instance to a component
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73 ComponentDescription desc;
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74 result = GetComponentInfo ((Component)*inDestUnit, &desc, 0, 0, 0);
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75 if (result) return 0; //THROW_RESULT("GetComponentInfo")
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76
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77 // we're going to use this to know which convert routine to call
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78 // a v1 audio unit will have a type of 'aunt'
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79 // a v2 audio unit will have one of several different types.
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80 if (desc.componentType != kAudioUnitComponentType) {
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81 result = badComponentInstance;
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82 //THROW_RESULT("BAD COMPONENT")
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83 if (result) return 0;
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84 }
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85
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86 /* Set the input format of the audio unit. */
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87 result = AudioUnitSetProperty (*inDestUnit,
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88 kAudioUnitProperty_StreamFormat,
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89 kAudioUnitScope_Input,
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90 0,
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91 &afp->mFileDescription,
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92 sizeof (afp->mFileDescription));
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93 //THROW_RESULT("AudioUnitSetProperty")
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94 if (result) return 0;
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95 return 1;
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96 }
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97
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98 static void AudioFilePlayer_SetNotifier(AudioFilePlayer *afp, AudioFilePlayNotifier inNotifier, void *inRefCon)
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99 {
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100 afp->mNotifier = inNotifier;
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101 afp->mRefCon = inRefCon;
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102 }
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103
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104 static int AudioFilePlayer_IsConnected(AudioFilePlayer *afp)
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105 {
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106 return afp->mConnected;
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107 }
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108
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109 static AudioUnit AudioFilePlayer_GetDestUnit(AudioFilePlayer *afp)
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110 {
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111 return afp->mPlayUnit;
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112 }
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113
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114 static void AudioFilePlayer_Print(AudioFilePlayer *afp)
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115 {
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116 #if DEBUG
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117 printf ("Is Connected:%s\n", (IsConnected() ? "true" : "false"));
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118 printf ("- - - - - - - - - - - - - - \n");
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119 #endif
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120 }
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121
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122 static void AudioFilePlayer_SetStartFrame (AudioFilePlayer *afp, int frame)
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123 {
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124 SInt64 position = frame * 2352;
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125
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126 afp->mStartFrame = frame;
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127 afp->mAudioFileManager->SetPosition (afp->mAudioFileManager, position);
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128 }
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129
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130
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131 static int AudioFilePlayer_GetCurrentFrame (AudioFilePlayer *afp)
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132 {
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133 return afp->mStartFrame + (afp->mAudioFileManager->GetByteCounter(afp->mAudioFileManager) / 2352);
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134 }
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135
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136 static void AudioFilePlayer_SetStopFrame (AudioFilePlayer *afp, int frame)
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137 {
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138 SInt64 position = frame * 2352;
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139
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140 afp->mAudioFileManager->SetEndOfFile (afp->mAudioFileManager, position);
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141 }
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142
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143 void delete_AudioFilePlayer(AudioFilePlayer *afp)
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144 {
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145 if (afp != NULL)
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146 {
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147 afp->Disconnect(afp);
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148
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149 if (afp->mAudioFileManager) {
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150 delete_AudioFileManager(afp->mAudioFileManager);
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151 afp->mAudioFileManager = 0;
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152 }
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153
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154 if (afp->mForkRefNum) {
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155 FSClose (afp->mForkRefNum);
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156 afp->mForkRefNum = 0;
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157 }
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158 free(afp);
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159 }
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160 }
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161
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162 static int AudioFilePlayer_Connect(AudioFilePlayer *afp)
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163 {
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164 #if DEBUG
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165 printf ("Connect:%x, engaged=%d\n", (int)afp->mPlayUnit, (afp->mConnected ? 1 : 0));
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166 #endif
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167 if (!afp->mConnected)
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168 {
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169 if (!afp->mAudioFileManager->DoConnect(afp->mAudioFileManager))
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170 return 0;
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171
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172 // set the render callback for the file data to be supplied to the sound converter AU
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173 afp->mInputCallback.inputProc = afp->mAudioFileManager->FileInputProc;
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174 afp->mInputCallback.inputProcRefCon = afp->mAudioFileManager;
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175
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176 OSStatus result = AudioUnitSetProperty (afp->mPlayUnit,
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177 kAudioUnitProperty_SetInputCallback,
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178 kAudioUnitScope_Input,
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179 0,
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180 &afp->mInputCallback,
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181 sizeof(afp->mInputCallback));
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182 if (result) return 0; //THROW_RESULT("AudioUnitSetProperty")
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183 afp->mConnected = 1;
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184 }
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185
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186 return 1;
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187 }
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188
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189 // warning noted, now please go away ;-)
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190 // #warning This should redirect the calling of notification code to some other thread
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191 static void AudioFilePlayer_DoNotification (AudioFilePlayer *afp, OSStatus inStatus)
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192 {
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193 if (afp->mNotifier) {
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194 (*afp->mNotifier) (afp->mRefCon, inStatus);
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195 } else {
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196 SDL_SetError ("Notification posted with no notifier in place");
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197
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198 if (inStatus == kAudioFilePlay_FileIsFinished)
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199 afp->Disconnect(afp);
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200 else if (inStatus != kAudioFilePlayErr_FilePlayUnderrun)
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201 afp->Disconnect(afp);
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202 }
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203 }
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204
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205 static void AudioFilePlayer_Disconnect (AudioFilePlayer *afp)
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206 {
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207 #if DEBUG
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208 printf ("Disconnect:%x,%ld, engaged=%d\n", (int)afp->mPlayUnit, 0, (afp->mConnected ? 1 : 0));
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209 #endif
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210 if (afp->mConnected)
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211 {
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212 afp->mConnected = 0;
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213
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214 afp->mInputCallback.inputProc = 0;
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215 afp->mInputCallback.inputProcRefCon = 0;
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216 OSStatus result = AudioUnitSetProperty (afp->mPlayUnit,
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217 kAudioUnitProperty_SetInputCallback,
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218 kAudioUnitScope_Input,
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219 0,
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220 &afp->mInputCallback,
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221 sizeof(afp->mInputCallback));
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222 if (result)
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223 SDL_SetError ("AudioUnitSetProperty:RemoveInputCallback:%ld", result);
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224
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225 afp->mAudioFileManager->Disconnect(afp->mAudioFileManager);
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226 }
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227 }
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228
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229 typedef struct {
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230 UInt32 offset;
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231 UInt32 blockSize;
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232 } SSNDData;
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233
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234 static int AudioFilePlayer_OpenFile (AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileDataSize)
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235 {
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236 ContainerChunk chunkHeader;
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237 ChunkHeader chunk;
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238 SSNDData ssndData;
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239
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240 OSErr result;
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241 HFSUniStr255 dfName;
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242 ByteCount actual;
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243 SInt64 offset;
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244
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245 // Open the data fork of the input file
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246 result = FSGetDataForkName(&dfName);
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247 if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSGetDataForkName")
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248
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249 result = FSOpenFork(inRef, dfName.length, dfName.unicode, fsRdPerm, &afp->mForkRefNum);
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250 if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSOpenFork")
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251
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252 // Read the file header, and check if it's indeed an AIFC file
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253 result = FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(chunkHeader), &chunkHeader, &actual);
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254 if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")
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255
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256 if (chunkHeader.ckID != 'FORM') {
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257 result = -1;
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258 if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): chunk id is not 'FORM'");
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259 }
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260
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261 if (chunkHeader.formType != 'AIFC') {
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262 result = -1;
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263 if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): file format is not 'AIFC'");
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264 }
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265
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266 // Search for the SSND chunk. We ignore all compression etc. information
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267 // in other chunks. Of course that is kind of evil, but for now we are lazy
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268 // and rely on the cdfs to always give us the same fixed format.
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269 // TODO: Parse the COMM chunk we currently skip to fill in mFileDescription.
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270 offset = 0;
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271 do {
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272 result = FSReadFork(afp->mForkRefNum, fsFromMark, offset, sizeof(chunk), &chunk, &actual);
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273 if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")
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274
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275 // Skip the chunk data
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276 offset = chunk.ckSize;
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277 } while (chunk.ckID != 'SSND');
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278
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279 // Read the header of the SSND chunk. After this, we are positioned right
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280 // at the start of the audio data.
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281 result = FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(ssndData), &ssndData, &actual);
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282 if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")
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283
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284 result = FSSetForkPosition(afp->mForkRefNum, fsFromMark, ssndData.offset);
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285 if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSSetForkPosition")
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286
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287 // Data size
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288 *outFileDataSize = chunk.ckSize - ssndData.offset - 8;
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289
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290 // File format
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291 afp->mFileDescription.mSampleRate = 44100;
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292 afp->mFileDescription.mFormatID = kAudioFormatLinearPCM;
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293 afp->mFileDescription.mFormatFlags = kLinearPCMFormatFlagIsPacked | kLinearPCMFormatFlagIsSignedInteger;
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294 afp->mFileDescription.mBytesPerPacket = 4;
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295 afp->mFileDescription.mFramesPerPacket = 1;
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296 afp->mFileDescription.mBytesPerFrame = 4;
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297 afp->mFileDescription.mChannelsPerFrame = 2;
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298 afp->mFileDescription.mBitsPerChannel = 16;
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299
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300 return 1;
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301 }
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302
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303 AudioFilePlayer *new_AudioFilePlayer (const FSRef *inFileRef)
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304 {
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305 SInt64 fileDataSize = 0;
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306
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307 AudioFilePlayer *afp = (AudioFilePlayer *) malloc(sizeof (AudioFilePlayer));
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308 if (afp == NULL)
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309 return NULL;
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310 memset(afp, '\0', sizeof (*afp));
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311
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312 #define SET_AUDIOFILEPLAYER_METHOD(m) afp->m = AudioFilePlayer_##m
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313 SET_AUDIOFILEPLAYER_METHOD(SetDestination);
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314 SET_AUDIOFILEPLAYER_METHOD(SetNotifier);
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315 SET_AUDIOFILEPLAYER_METHOD(SetStartFrame);
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316 SET_AUDIOFILEPLAYER_METHOD(GetCurrentFrame);
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317 SET_AUDIOFILEPLAYER_METHOD(SetStopFrame);
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318 SET_AUDIOFILEPLAYER_METHOD(Connect);
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319 SET_AUDIOFILEPLAYER_METHOD(Disconnect);
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320 SET_AUDIOFILEPLAYER_METHOD(DoNotification);
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321 SET_AUDIOFILEPLAYER_METHOD(IsConnected);
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322 SET_AUDIOFILEPLAYER_METHOD(GetDestUnit);
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323 SET_AUDIOFILEPLAYER_METHOD(Print);
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324 SET_AUDIOFILEPLAYER_METHOD(OpenFile);
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325 #undef SET_AUDIOFILEPLAYER_METHOD
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326
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327 if (!afp->OpenFile (afp, inFileRef, &fileDataSize))
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328 {
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329 free(afp);
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330 return NULL;
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331 }
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332
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333 // we want about 4 seconds worth of data for the buffer
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334 int bytesPerSecond = (UInt32) (4 * afp->mFileDescription.mSampleRate * afp->mFileDescription.mBytesPerFrame);
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335
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336 #if DEBUG
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337 printf("File format:\n");
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338 PrintStreamDesc (&afp->mFileDescription);
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339 #endif
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340
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341 afp->mAudioFileManager = new_AudioFileManager(afp, afp->mForkRefNum,
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342 fileDataSize,
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343 bytesPerSecond);
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344 if (afp->mAudioFileManager == NULL)
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345 {
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346 delete_AudioFilePlayer(afp);
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347 return NULL;
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348 }
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349
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350 return afp;
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351 }
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352