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annotate src/cdrom/macosx/AudioFilePlayer.h @ 1355:4d0f2b2147cf

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*** empty log message ***
author Sam Lantinga <slouken@libsdl.org>
date Fri, 10 Feb 2006 03:00:38 +0000
parents 71a2648acc75
children d910939febfa
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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.h
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28 //
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29 #ifndef __AudioFilePlayer_H__
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30 #define __AudioFilePlayer_H__
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31
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32 #include <CoreServices/CoreServices.h>
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33
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34 #include <AudioUnit/AudioUnit.h>
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35
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36 #include "SDL_error.h"
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37
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38 const char* AudioFilePlayerErrorStr (OSStatus error);
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40 /*
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41 void ThrowResult (OSStatus result, const char *str);
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42
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43 #define THROW_RESULT(str) \
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44 if (result) { \
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45 ThrowResult (result, str); \
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46 }
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47 */
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48
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49 typedef void (*AudioFilePlayNotifier)(void *inRefCon,
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50 OSStatus inStatus);
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51
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52 enum {
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53 kAudioFilePlayErr_FilePlayUnderrun = -10000,
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54 kAudioFilePlay_FileIsFinished = -10001,
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55 kAudioFilePlay_PlayerIsUninitialized = -10002
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56 };
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57
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59 struct S_AudioFileManager;
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60
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61 #pragma mark __________ AudioFilePlayer
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62 typedef struct S_AudioFilePlayer
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63 {
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64 //public:
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65 int (*SetDestination)(struct S_AudioFilePlayer *afp, AudioUnit *inDestUnit);
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66 void (*SetNotifier)(struct S_AudioFilePlayer *afp, AudioFilePlayNotifier inNotifier, void *inRefCon);
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67 void (*SetStartFrame)(struct S_AudioFilePlayer *afp, int frame); // seek in the file
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68 int (*GetCurrentFrame)(struct S_AudioFilePlayer *afp); // get the current frame position
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69 void (*SetStopFrame)(struct S_AudioFilePlayer *afp, int frame); // set limit in the file
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70 int (*Connect)(struct S_AudioFilePlayer *afp);
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71 void (*Disconnect)(struct S_AudioFilePlayer *afp);
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72 void (*DoNotification)(struct S_AudioFilePlayer *afp, OSStatus inError);
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73 int (*IsConnected)(struct S_AudioFilePlayer *afp);
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74 AudioUnit (*GetDestUnit)(struct S_AudioFilePlayer *afp);
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75 void (*Print)(struct S_AudioFilePlayer *afp);
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76
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77 //private:
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78 AudioUnit mPlayUnit;
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79 SInt16 mForkRefNum;
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80
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81 AudioUnitInputCallback mInputCallback;
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82
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83 AudioStreamBasicDescription mFileDescription;
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84
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85 int mConnected;
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87 struct S_AudioFileManager* mAudioFileManager;
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88
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89 AudioFilePlayNotifier mNotifier;
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90 void* mRefCon;
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91
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92 int mStartFrame;
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93
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94 #pragma mark __________ Private_Methods
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95
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96 int (*OpenFile)(struct S_AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileSize);
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97 } AudioFilePlayer;
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100 AudioFilePlayer *new_AudioFilePlayer(const FSRef *inFileRef);
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101 void delete_AudioFilePlayer(AudioFilePlayer *afp);
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103
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105 #pragma mark __________ AudioFileManager
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106 typedef struct S_AudioFileManager
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107 {
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108 //public:
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109 // this method should NOT be called by an object of this class
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110 // as it is called by the parent's Disconnect() method
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111 void (*Disconnect)(struct S_AudioFileManager *afm);
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112 int (*DoConnect)(struct S_AudioFileManager *afm);
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113 OSStatus (*Read)(struct S_AudioFileManager *afm, char *buffer, UInt32 *len);
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114 const char* (*GetFileBuffer)(struct S_AudioFileManager *afm);
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115 const AudioFilePlayer *(*GetParent)(struct S_AudioFileManager *afm);
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116 void (*SetPosition)(struct S_AudioFileManager *afm, SInt64 pos); // seek/rewind in the file
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117 int (*GetByteCounter)(struct S_AudioFileManager *afm); // return actual bytes streamed to audio hardware
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118 void (*SetEndOfFile)(struct S_AudioFileManager *afm, SInt64 pos); // set the "EOF" (will behave just like it reached eof)
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119
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120 //protected:
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121 AudioFilePlayer* mParent;
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122 SInt16 mForkRefNum;
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123 SInt64 mAudioDataOffset;
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124
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125 char* mFileBuffer;
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126
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127 int mByteCounter;
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128
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129 int mReadFromFirstBuffer;
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130 int mLockUnsuccessful;
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131 int mIsEngaged;
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132
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133 int mNumTimesAskedSinceFinished;
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134
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136 void* mTmpBuffer;
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137 UInt32 mBufferSize;
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138 UInt32 mBufferOffset;
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139 //public:
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140 UInt32 mChunkSize;
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141 SInt64 mFileLength;
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142 SInt64 mReadFilePosition;
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143 int mWriteToFirstBuffer;
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144 int mFinishedReadingData;
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145
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146 //protected:
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147 OSStatus (*Render)(struct S_AudioFileManager *afm, AudioBuffer *ioData);
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148 OSStatus (*GetFileData)(struct S_AudioFileManager *afm, void** inOutData, UInt32 *inOutDataSize);
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149 void (*AfterRender)(struct S_AudioFileManager *afm);
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150
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151 //public:
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152 //static
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153 OSStatus (*FileInputProc)(void *inRefCon,
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154 AudioUnitRenderActionFlags inActionFlags,
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155 const AudioTimeStamp *inTimeStamp,
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156 UInt32 inBusNumber,
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157 AudioBuffer *ioData);
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158 } AudioFileManager;
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159
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160
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161 AudioFileManager *new_AudioFileManager (AudioFilePlayer *inParent,
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162 SInt16 inForkRefNum,
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163 SInt64 inFileLength,
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164 UInt32 inChunkSize);
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165
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166 void delete_AudioFileManager(AudioFileManager *afm);
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167
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168 #endif
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169