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annotate src/cdrom/macosx/AudioFilePlayer.h @ 4237:0adda8ff43ef SDL-1.2

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Potentially fixed bug #774 There's a mismatch between ndev and MAX_INPUTS
author Sam Lantinga <slouken@libsdl.org>
date Wed, 23 Sep 2009 06:57:12 +0000
parents 386181851388
children 4c088d2b29eb
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21
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22 This file based on Apple sample code. We haven't changed the file name,
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23 so if you want to see the original search for it on apple.com/developer
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24 */
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25 #include "SDL_config.h"
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26
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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 #if MAC_OS_X_VERSION_MAX_ALLOWED <= 1050
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37 #include <AudioUnit/AUNTComponent.h>
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38 #endif
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39
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40 #include "SDL_error.h"
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41
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42 const char* AudioFilePlayerErrorStr (OSStatus error);
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43
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44 /*
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45 void ThrowResult (OSStatus result, const char *str);
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46
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47 #define THROW_RESULT(str) \
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48 if (result) { \
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49 ThrowResult (result, str); \
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50 }
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51 */
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52
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53 typedef void (*AudioFilePlayNotifier)(void *inRefCon,
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54 OSStatus inStatus);
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55
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56 enum {
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57 kAudioFilePlayErr_FilePlayUnderrun = -10000,
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58 kAudioFilePlay_FileIsFinished = -10001,
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59 kAudioFilePlay_PlayerIsUninitialized = -10002
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60 };
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61
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62
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63 struct S_AudioFileManager;
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64
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65 #pragma mark __________ AudioFilePlayer
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66 typedef struct S_AudioFilePlayer
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67 {
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68 /*public:*/
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69 int (*SetDestination)(struct S_AudioFilePlayer *afp, AudioUnit *inDestUnit);
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70 void (*SetNotifier)(struct S_AudioFilePlayer *afp, AudioFilePlayNotifier inNotifier, void *inRefCon);
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71 void (*SetStartFrame)(struct S_AudioFilePlayer *afp, int frame); /* seek in the file */
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72 int (*GetCurrentFrame)(struct S_AudioFilePlayer *afp); /* get the current frame position */
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73 void (*SetStopFrame)(struct S_AudioFilePlayer *afp, int frame); /* set limit in the file */
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74 int (*Connect)(struct S_AudioFilePlayer *afp);
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75 void (*Disconnect)(struct S_AudioFilePlayer *afp);
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76 void (*DoNotification)(struct S_AudioFilePlayer *afp, OSStatus inError);
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77 int (*IsConnected)(struct S_AudioFilePlayer *afp);
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78 AudioUnit (*GetDestUnit)(struct S_AudioFilePlayer *afp);
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79 void (*Print)(struct S_AudioFilePlayer *afp);
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80
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81 /*private:*/
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82 AudioUnit mPlayUnit;
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83 SInt16 mForkRefNum;
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84
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85 AURenderCallbackStruct mInputCallback;
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86
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87 AudioStreamBasicDescription mFileDescription;
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88
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89 int mConnected;
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91 struct S_AudioFileManager* mAudioFileManager;
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92
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93 AudioFilePlayNotifier mNotifier;
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94 void* mRefCon;
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95
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96 int mStartFrame;
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97
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98 #pragma mark __________ Private_Methods
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99
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100 int (*OpenFile)(struct S_AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileSize);
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101 } AudioFilePlayer;
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102
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103
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104 AudioFilePlayer *new_AudioFilePlayer(const FSRef *inFileRef);
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105 void delete_AudioFilePlayer(AudioFilePlayer *afp);
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107
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108
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109 #pragma mark __________ AudioFileManager
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110 typedef struct S_AudioFileManager
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111 {
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112 /*public:*/
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113 /* this method should NOT be called by an object of this class
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114 as it is called by the parent's Disconnect() method */
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115 void (*Disconnect)(struct S_AudioFileManager *afm);
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116 int (*DoConnect)(struct S_AudioFileManager *afm);
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117 OSStatus (*Read)(struct S_AudioFileManager *afm, char *buffer, ByteCount *len);
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118 const char* (*GetFileBuffer)(struct S_AudioFileManager *afm);
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119 const AudioFilePlayer *(*GetParent)(struct S_AudioFileManager *afm);
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120 void (*SetPosition)(struct S_AudioFileManager *afm, SInt64 pos); /* seek/rewind in the file */
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121 int (*GetByteCounter)(struct S_AudioFileManager *afm); /* return actual bytes streamed to audio hardware */
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122 void (*SetEndOfFile)(struct S_AudioFileManager *afm, SInt64 pos); /* set the "EOF" (will behave just like it reached eof) */
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123
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124 /*protected:*/
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125 AudioFilePlayer* mParent;
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126 SInt16 mForkRefNum;
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127 SInt64 mAudioDataOffset;
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128
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129 char* mFileBuffer;
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130
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131 int mByteCounter;
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132
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133 int mReadFromFirstBuffer;
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134 int mLockUnsuccessful;
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135 int mIsEngaged;
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136
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137 int mNumTimesAskedSinceFinished;
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138
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139
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140 void* mTmpBuffer;
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141 UInt32 mBufferSize;
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142 UInt32 mBufferOffset;
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143 /*public:*/
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144 UInt32 mChunkSize;
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145 SInt64 mFileLength;
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146 SInt64 mReadFilePosition;
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147 int mWriteToFirstBuffer;
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148 int mFinishedReadingData;
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149
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150 /*protected:*/
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151 OSStatus (*Render)(struct S_AudioFileManager *afm, AudioBufferList *ioData);
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152 OSStatus (*GetFileData)(struct S_AudioFileManager *afm, void** inOutData, UInt32 *inOutDataSize);
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153 void (*AfterRender)(struct S_AudioFileManager *afm);
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154
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155 /*public:*/
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156 /*static*/
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157 OSStatus (*FileInputProc)(void *inRefCon,
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158 AudioUnitRenderActionFlags *ioActionFlags,
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159 const AudioTimeStamp *inTimeStamp,
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160 UInt32 inBusNumber,
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161 UInt32 inNumberFrames,
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162 AudioBufferList *ioData);
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163 } AudioFileManager;
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164
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165
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166 AudioFileManager *new_AudioFileManager (AudioFilePlayer *inParent,
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167 SInt16 inForkRefNum,
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168 SInt64 inFileLength,
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169 UInt32 inChunkSize);
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170
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171 void delete_AudioFileManager(AudioFileManager *afm);
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172
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173 #endif
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174