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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 #ifdef AVAILABLE_MAC_OS_X_VERSION_10_5_AND_LATER |
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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 AudioUnitInputCallback 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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90 |
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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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106 |
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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, UInt32 *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, AudioBuffer *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 inActionFlags, |
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159 const AudioTimeStamp *inTimeStamp, |
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160 UInt32 inBusNumber, |
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161 AudioBuffer *ioData); |
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162 } AudioFileManager; |
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163 |
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164 |
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165 AudioFileManager *new_AudioFileManager (AudioFilePlayer *inParent, |
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166 SInt16 inForkRefNum, |
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167 SInt64 inFileLength, |
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168 UInt32 inChunkSize); |
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169 |
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170 void delete_AudioFileManager(AudioFileManager *afm); |
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171 |
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172 #endif |
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173 |