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annotate src/cdrom/macosx/AudioFilePlayer.h @ 4068:86746036a6d6 SDL-1.2

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I think this fixes bug #454
author Sam Lantinga <slouken@libsdl.org>
date Sun, 15 Jul 2007 14:05:31 +0000
parents dc6b59e925a2
children 782fd950bd46 c121d94672cb 9df8136abec0
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 #include "SDL_config.h"
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26
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27 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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28 AudioFilePlayer.h
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29 */
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30 #ifndef __AudioFilePlayer_H__
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31 #define __AudioFilePlayer_H__
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32
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33 #include <CoreServices/CoreServices.h>
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34
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35 #include <AudioUnit/AudioUnit.h>
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36
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37 #include "SDL_error.h"
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38
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39 const char* AudioFilePlayerErrorStr (OSStatus error);
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40
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41 /*
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42 void ThrowResult (OSStatus result, const char *str);
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43
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44 #define THROW_RESULT(str) \
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45 if (result) { \
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46 ThrowResult (result, str); \
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47 }
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48 */
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49
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50 typedef void (*AudioFilePlayNotifier)(void *inRefCon,
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51 OSStatus inStatus);
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52
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53 enum {
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54 kAudioFilePlayErr_FilePlayUnderrun = -10000,
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55 kAudioFilePlay_FileIsFinished = -10001,
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56 kAudioFilePlay_PlayerIsUninitialized = -10002
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57 };
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58
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60 struct S_AudioFileManager;
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61
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62 #pragma mark __________ AudioFilePlayer
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63 typedef struct S_AudioFilePlayer
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64 {
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65 /*public:*/
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66 int (*SetDestination)(struct S_AudioFilePlayer *afp, AudioUnit *inDestUnit);
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67 void (*SetNotifier)(struct S_AudioFilePlayer *afp, AudioFilePlayNotifier inNotifier, void *inRefCon);
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68 void (*SetStartFrame)(struct S_AudioFilePlayer *afp, int frame); /* seek in the file */
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69 int (*GetCurrentFrame)(struct S_AudioFilePlayer *afp); /* get the current frame position */
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70 void (*SetStopFrame)(struct S_AudioFilePlayer *afp, int frame); /* set limit in the file */
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71 int (*Connect)(struct S_AudioFilePlayer *afp);
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72 void (*Disconnect)(struct S_AudioFilePlayer *afp);
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73 void (*DoNotification)(struct S_AudioFilePlayer *afp, OSStatus inError);
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74 int (*IsConnected)(struct S_AudioFilePlayer *afp);
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75 AudioUnit (*GetDestUnit)(struct S_AudioFilePlayer *afp);
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76 void (*Print)(struct S_AudioFilePlayer *afp);
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77
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78 /*private:*/
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79 AudioUnit mPlayUnit;
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80 SInt16 mForkRefNum;
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81
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82 AudioUnitInputCallback mInputCallback;
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83
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84 AudioStreamBasicDescription mFileDescription;
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85
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86 int mConnected;
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88 struct S_AudioFileManager* mAudioFileManager;
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89
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90 AudioFilePlayNotifier mNotifier;
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91 void* mRefCon;
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92
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93 int mStartFrame;
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94
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95 #pragma mark __________ Private_Methods
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96
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97 int (*OpenFile)(struct S_AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileSize);
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98 } AudioFilePlayer;
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99
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101 AudioFilePlayer *new_AudioFilePlayer(const FSRef *inFileRef);
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102 void delete_AudioFilePlayer(AudioFilePlayer *afp);
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103
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104
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105
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106 #pragma mark __________ AudioFileManager
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107 typedef struct S_AudioFileManager
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108 {
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109 /*public:*/
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110 /* this method should NOT be called by an object of this class
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111 as it is called by the parent's Disconnect() method */
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112 void (*Disconnect)(struct S_AudioFileManager *afm);
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113 int (*DoConnect)(struct S_AudioFileManager *afm);
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114 OSStatus (*Read)(struct S_AudioFileManager *afm, char *buffer, UInt32 *len);
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115 const char* (*GetFileBuffer)(struct S_AudioFileManager *afm);
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116 const AudioFilePlayer *(*GetParent)(struct S_AudioFileManager *afm);
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117 void (*SetPosition)(struct S_AudioFileManager *afm, SInt64 pos); /* seek/rewind in the file */
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118 int (*GetByteCounter)(struct S_AudioFileManager *afm); /* return actual bytes streamed to audio hardware */
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119 void (*SetEndOfFile)(struct S_AudioFileManager *afm, SInt64 pos); /* set the "EOF" (will behave just like it reached eof) */
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120
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121 /*protected:*/
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122 AudioFilePlayer* mParent;
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123 SInt16 mForkRefNum;
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124 SInt64 mAudioDataOffset;
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125
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126 char* mFileBuffer;
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127
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128 int mByteCounter;
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129
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130 int mReadFromFirstBuffer;
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131 int mLockUnsuccessful;
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132 int mIsEngaged;
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133
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134 int mNumTimesAskedSinceFinished;
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135
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137 void* mTmpBuffer;
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138 UInt32 mBufferSize;
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139 UInt32 mBufferOffset;
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140 /*public:*/
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141 UInt32 mChunkSize;
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142 SInt64 mFileLength;
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143 SInt64 mReadFilePosition;
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144 int mWriteToFirstBuffer;
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145 int mFinishedReadingData;
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146
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147 /*protected:*/
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148 OSStatus (*Render)(struct S_AudioFileManager *afm, AudioBuffer *ioData);
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149 OSStatus (*GetFileData)(struct S_AudioFileManager *afm, void** inOutData, UInt32 *inOutDataSize);
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150 void (*AfterRender)(struct S_AudioFileManager *afm);
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151
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152 /*public:*/
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153 /*static*/
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154 OSStatus (*FileInputProc)(void *inRefCon,
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155 AudioUnitRenderActionFlags inActionFlags,
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156 const AudioTimeStamp *inTimeStamp,
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157 UInt32 inBusNumber,
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158 AudioBuffer *ioData);
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159 } AudioFileManager;
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161
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162 AudioFileManager *new_AudioFileManager (AudioFilePlayer *inParent,
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163 SInt16 inForkRefNum,
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164 SInt64 inFileLength,
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165 UInt32 inChunkSize);
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166
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167 void delete_AudioFileManager(AudioFileManager *afm);
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168
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169 #endif
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170