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annotate src/cdrom/macosx/AudioFilePlayer.c @ 1698:412149a1c756 SDL-1.3

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Renamed, per Mike's comment on bug #157
author Sam Lantinga <slouken@libsdl.org>
date Wed, 21 Jun 2006 08:25:17 +0000
parents 4da1ee79c9af
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 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
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42 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
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64 AudioFilePlayer_SetDestination(AudioFilePlayer * afp, AudioUnit * inDestUnit)
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65 {
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66 /*if (afp->mConnected) throw static_cast<OSStatus>(-1); *//* can't set dest if already engaged */
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67 if (afp->mConnected)
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68 return 0;
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69
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70 SDL_memcpy(&afp->mPlayUnit, inDestUnit, sizeof(afp->mPlayUnit));
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71
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72 OSStatus result = noErr;
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73
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74
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75 /* we can "down" cast a component instance to a component */
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76 ComponentDescription desc;
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77 result = GetComponentInfo((Component) * inDestUnit, &desc, 0, 0, 0);
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78 if (result)
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79 return 0; /*THROW_RESULT("GetComponentInfo") */
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80
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81 /* we're going to use this to know which convert routine to call
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82 a v1 audio unit will have a type of 'aunt'
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83 a v2 audio unit will have one of several different types. */
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84 if (desc.componentType != kAudioUnitComponentType) {
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85 result = badComponentInstance;
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86 /*THROW_RESULT("BAD COMPONENT") */
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87 if (result)
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88 return 0;
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89 }
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90
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91 /* Set the input format of the audio unit. */
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92 result = AudioUnitSetProperty(*inDestUnit,
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93 kAudioUnitProperty_StreamFormat,
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94 kAudioUnitScope_Input,
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95 0,
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96 &afp->mFileDescription,
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97 sizeof(afp->mFileDescription));
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98 /*THROW_RESULT("AudioUnitSetProperty") */
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99 if (result)
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100 return 0;
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101 return 1;
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102 }
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103
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104 static void
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105 AudioFilePlayer_SetNotifier(AudioFilePlayer * afp,
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106 AudioFilePlayNotifier inNotifier, void *inRefCon)
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107 {
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108 afp->mNotifier = inNotifier;
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109 afp->mRefCon = inRefCon;
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110 }
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111
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112 static int
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113 AudioFilePlayer_IsConnected(AudioFilePlayer * afp)
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114 {
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115 return afp->mConnected;
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116 }
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117
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118 static AudioUnit
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119 AudioFilePlayer_GetDestUnit(AudioFilePlayer * afp)
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120 {
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121 return afp->mPlayUnit;
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122 }
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123
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124 static void
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125 AudioFilePlayer_Print(AudioFilePlayer * afp)
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126 {
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127 #if DEBUG
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128 printf("Is Connected:%s\n", (IsConnected()? "true" : "false"));
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129 printf("- - - - - - - - - - - - - - \n");
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130 #endif
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131 }
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132
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133 static void
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134 AudioFilePlayer_SetStartFrame(AudioFilePlayer * afp, int frame)
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135 {
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136 SInt64 position = frame * 2352;
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137
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138 afp->mStartFrame = frame;
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139 afp->mAudioFileManager->SetPosition(afp->mAudioFileManager, position);
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140 }
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141
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142
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143 static int
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144 AudioFilePlayer_GetCurrentFrame(AudioFilePlayer * afp)
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145 {
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146 return afp->mStartFrame +
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147 (afp->mAudioFileManager->GetByteCounter(afp->mAudioFileManager) /
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148 2352);
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149 }
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150
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151 static void
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152 AudioFilePlayer_SetStopFrame(AudioFilePlayer * afp, int frame)
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153 {
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154 SInt64 position = frame * 2352;
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155
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156 afp->mAudioFileManager->SetEndOfFile(afp->mAudioFileManager, position);
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157 }
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158
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159 void
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160 delete_AudioFilePlayer(AudioFilePlayer * afp)
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161 {
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162 if (afp != NULL) {
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163 afp->Disconnect(afp);
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164
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165 if (afp->mAudioFileManager) {
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166 delete_AudioFileManager(afp->mAudioFileManager);
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167 afp->mAudioFileManager = 0;
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168 }
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169
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170 if (afp->mForkRefNum) {
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171 FSCloseFork(afp->mForkRefNum);
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172 afp->mForkRefNum = 0;
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173 }
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174 SDL_free(afp);
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175 }
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176 }
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177
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178 static int
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179 AudioFilePlayer_Connect(AudioFilePlayer * afp)
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180 {
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181 #if DEBUG
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182 printf("Connect:%x, engaged=%d\n", (int) afp->mPlayUnit,
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183 (afp->mConnected ? 1 : 0));
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184 #endif
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185 if (!afp->mConnected) {
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186 if (!afp->mAudioFileManager->DoConnect(afp->mAudioFileManager))
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187 return 0;
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188
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189 /* set the render callback for the file data to be supplied to the sound converter AU */
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190 afp->mInputCallback.inputProc = afp->mAudioFileManager->FileInputProc;
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191 afp->mInputCallback.inputProcRefCon = afp->mAudioFileManager;
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192
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193 OSStatus result = AudioUnitSetProperty(afp->mPlayUnit,
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194 kAudioUnitProperty_SetInputCallback,
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195 kAudioUnitScope_Input,
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196 0,
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197 &afp->mInputCallback,
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198 sizeof(afp->mInputCallback));
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199 if (result)
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200 return 0; /*THROW_RESULT("AudioUnitSetProperty") */
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201 afp->mConnected = 1;
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202 }
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203
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204 return 1;
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205 }
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206
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207 /* warning noted, now please go away ;-) */
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208 /* #warning This should redirect the calling of notification code to some other thread */
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209 static void
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210 AudioFilePlayer_DoNotification(AudioFilePlayer * afp, OSStatus inStatus)
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211 {
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212 if (afp->mNotifier) {
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213 (*afp->mNotifier) (afp->mRefCon, inStatus);
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214 } else {
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215 SDL_SetError("Notification posted with no notifier in place");
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216
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217 if (inStatus == kAudioFilePlay_FileIsFinished)
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218 afp->Disconnect(afp);
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219 else if (inStatus != kAudioFilePlayErr_FilePlayUnderrun)
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220 afp->Disconnect(afp);
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221 }
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222 }
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223
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224 static void
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225 AudioFilePlayer_Disconnect(AudioFilePlayer * afp)
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226 {
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227 #if DEBUG
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228 printf("Disconnect:%x,%ld, engaged=%d\n", (int) afp->mPlayUnit, 0,
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229 (afp->mConnected ? 1 : 0));
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230 #endif
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231 if (afp->mConnected) {
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232 afp->mConnected = 0;
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233
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234 afp->mInputCallback.inputProc = 0;
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235 afp->mInputCallback.inputProcRefCon = 0;
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236 OSStatus result = AudioUnitSetProperty(afp->mPlayUnit,
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237 kAudioUnitProperty_SetInputCallback,
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238 kAudioUnitScope_Input,
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239 0,
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240 &afp->mInputCallback,
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241 sizeof(afp->mInputCallback));
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242 if (result)
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243 SDL_SetError("AudioUnitSetProperty:RemoveInputCallback:%ld",
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244 result);
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245
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246 afp->mAudioFileManager->Disconnect(afp->mAudioFileManager);
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247 }
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248 }
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249
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250 typedef struct
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251 {
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252 UInt32 offset;
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253 UInt32 blockSize;
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254 } SSNDData;
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255
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256 static int
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257 AudioFilePlayer_OpenFile(AudioFilePlayer * afp, const FSRef * inRef,
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258 SInt64 * outFileDataSize)
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259 {
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260 ContainerChunk chunkHeader;
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diff changeset
261 ChunkHeader chunk;
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262 SSNDData ssndData;
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263
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264 OSErr result;
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265 HFSUniStr255 dfName;
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266 ByteCount actual;
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267 SInt64 offset;
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268
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269 /* Open the data fork of the input file */
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270 result = FSGetDataForkName(&dfName);
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271 if (result)
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272 return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSGetDataForkName") */
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273
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274 result =
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275 FSOpenFork(inRef, dfName.length, dfName.unicode, fsRdPerm,
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276 &afp->mForkRefNum);
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277 if (result)
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278 return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSOpenFork") */
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279
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280 /* Read the file header, and check if it's indeed an AIFC file */
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281 result =
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282 FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(chunkHeader),
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283 &chunkHeader, &actual);
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284 if (result)
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285 return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork") */
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286
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287 if (chunkHeader.ckID != 'FORM') {
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288 result = -1;
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289 if (result)
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290 return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): chunk id is not 'FORM'"); */
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291 }
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292
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293 if (chunkHeader.formType != 'AIFC') {
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294 result = -1;
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295 if (result)
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296 return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): file format is not 'AIFC'"); */
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297 }
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298
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299 /* Search for the SSND chunk. We ignore all compression etc. information
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300 in other chunks. Of course that is kind of evil, but for now we are lazy
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301 and rely on the cdfs to always give us the same fixed format.
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302 TODO: Parse the COMM chunk we currently skip to fill in mFileDescription.
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303 */
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304 offset = 0;
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305 do {
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306 result =
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307 FSReadFork(afp->mForkRefNum, fsFromMark, offset,
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308 sizeof(chunk), &chunk, &actual);
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309 if (result)
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310 return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork") */
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311
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312 /* Skip the chunk data */
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313 offset = chunk.ckSize;
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314 }
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315 while (chunk.ckID != 'SSND');
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316
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317 /* Read the header of the SSND chunk. After this, we are positioned right
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318 at the start of the audio data. */
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319 result =
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320 FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(ssndData),
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321 &ssndData, &actual);
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322 if (result)
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323 return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork") */
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324
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325 result = FSSetForkPosition(afp->mForkRefNum, fsFromMark, ssndData.offset);
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326 if (result)
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327 return 0; /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSSetForkPosition") */
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328
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329 /* Data size */
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diff changeset
330 *outFileDataSize = chunk.ckSize - ssndData.offset - 8;
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331
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332 /* File format */
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diff changeset
333 afp->mFileDescription.mSampleRate = 44100;
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diff changeset
334 afp->mFileDescription.mFormatID = kAudioFormatLinearPCM;
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335 afp->mFileDescription.mFormatFlags =
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336 kLinearPCMFormatFlagIsPacked | kLinearPCMFormatFlagIsSignedInteger;
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337 afp->mFileDescription.mBytesPerPacket = 4;
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diff changeset
338 afp->mFileDescription.mFramesPerPacket = 1;
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339 afp->mFileDescription.mBytesPerFrame = 4;
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diff changeset
340 afp->mFileDescription.mChannelsPerFrame = 2;
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diff changeset
341 afp->mFileDescription.mBitsPerChannel = 16;
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342
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343 return 1;
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diff changeset
344 }
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345
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346 AudioFilePlayer *
1668
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347 new_AudioFilePlayer(const FSRef * inFileRef)
1143
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diff changeset
348 {
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349 SInt64 fileDataSize = 0;
1143
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350
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351 AudioFilePlayer *afp =
1668
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352 (AudioFilePlayer *) SDL_malloc(sizeof(AudioFilePlayer));
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353 if (afp == NULL)
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354 return NULL;
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355 SDL_memset(afp, '\0', sizeof(*afp));
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356
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357 #define SET_AUDIOFILEPLAYER_METHOD(m) afp->m = AudioFilePlayer_##m
1668
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358 SET_AUDIOFILEPLAYER_METHOD(SetDestination);
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359 SET_AUDIOFILEPLAYER_METHOD(SetNotifier);
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360 SET_AUDIOFILEPLAYER_METHOD(SetStartFrame);
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diff changeset
361 SET_AUDIOFILEPLAYER_METHOD(GetCurrentFrame);
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362 SET_AUDIOFILEPLAYER_METHOD(SetStopFrame);
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diff changeset
363 SET_AUDIOFILEPLAYER_METHOD(Connect);
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diff changeset
364 SET_AUDIOFILEPLAYER_METHOD(Disconnect);
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365 SET_AUDIOFILEPLAYER_METHOD(DoNotification);
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diff changeset
366 SET_AUDIOFILEPLAYER_METHOD(IsConnected);
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diff changeset
367 SET_AUDIOFILEPLAYER_METHOD(GetDestUnit);
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diff changeset
368 SET_AUDIOFILEPLAYER_METHOD(Print);
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diff changeset
369 SET_AUDIOFILEPLAYER_METHOD(OpenFile);
1662
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diff changeset
370 #undef SET_AUDIOFILEPLAYER_METHOD
1143
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371
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372 if (!afp->OpenFile(afp, inFileRef, &fileDataSize)) {
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373 SDL_free(afp);
1143
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diff changeset
374 return NULL;
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diff changeset
375 }
1662
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diff changeset
376
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diff changeset
377 /* we want about 4 seconds worth of data for the buffer */
1662
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diff changeset
378 int bytesPerSecond =
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diff changeset
379 (UInt32) (4 * afp->mFileDescription.mSampleRate *
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diff changeset
380 afp->mFileDescription.mBytesPerFrame);
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381
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382 #if DEBUG
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383 printf("File format:\n");
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384 PrintStreamDesc(&afp->mFileDescription);
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385 #endif
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386
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387 afp->mAudioFileManager = new_AudioFileManager(afp, afp->mForkRefNum,
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388 fileDataSize,
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389 bytesPerSecond);
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390 if (afp->mAudioFileManager == NULL) {
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391 delete_AudioFilePlayer(afp);
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392 return NULL;
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393 }
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394
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395 return afp;
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396 }
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397
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398 /* vi: set ts=4 sw=4 expandtab: */