| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Library General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2 of the License, or (at your option) any later version. |
| 9 | |
| 10 | This library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Library General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Library General Public |
| 16 | License along with this library; if not, write to the Free |
| 17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | |
| 22 | This file based on Apple sample code. We haven't changed the file name, |
| 23 | so if you want to see the original search for it on apple.com/developer |
| 24 | */ |
| 25 | #include "SDL_config.h" |
| 26 | |
| 27 | /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 28 | AudioFilePlayer.h |
| 29 | */ |
| 30 | #ifndef __AudioFilePlayer_H__ |
| 31 | #define __AudioFilePlayer_H__ |
| 32 | |
| 33 | #include <CoreServices/CoreServices.h> |
| 34 | |
| 35 | #include <AudioUnit/AudioUnit.h> |
| 36 | #if MAC_OS_X_VERSION_MAX_ALLOWED <= 1050 |
| 37 | #include <AudioUnit/AUNTComponent.h> |
| 38 | #endif |
| 39 | |
| 40 | #if __MAC_OS_X_VERSION_MIN_REQUIRED < 1050 |
| 41 | typedef SInt16 FSIORefNum; |
| 42 | #endif |
| 43 | |
| 44 | #include "SDL_error.h" |
| 45 | |
| 46 | const char* AudioFilePlayerErrorStr (OSStatus error); |
| 47 | |
| 48 | /* |
| 49 | void ThrowResult (OSStatus result, const char *str); |
| 50 | |
| 51 | #define THROW_RESULT(str) \ |
| 52 | if (result) { \ |
| 53 | ThrowResult (result, str); \ |
| 54 | } |
| 55 | */ |
| 56 | |
| 57 | typedef void (*AudioFilePlayNotifier)(void *inRefCon, |
| 58 | OSStatus inStatus); |
| 59 | |
| 60 | enum { |
| 61 | kAudioFilePlayErr_FilePlayUnderrun = -10000, |
| 62 | kAudioFilePlay_FileIsFinished = -10001, |
| 63 | kAudioFilePlay_PlayerIsUninitialized = -10002 |
| 64 | }; |
| 65 | |
| 66 | |
| 67 | struct S_AudioFileManager; |
| 68 | |
| 69 | #pragma mark __________ AudioFilePlayer |
| 70 | typedef struct S_AudioFilePlayer |
| 71 | { |
| 72 | /*public:*/ |
| 73 | int (*SetDestination)(struct S_AudioFilePlayer *afp, AudioUnit *inDestUnit); |
| 74 | void (*SetNotifier)(struct S_AudioFilePlayer *afp, AudioFilePlayNotifier inNotifier, void *inRefCon); |
| 75 | void (*SetStartFrame)(struct S_AudioFilePlayer *afp, int frame); /* seek in the file */ |
| 76 | int (*GetCurrentFrame)(struct S_AudioFilePlayer *afp); /* get the current frame position */ |
| 77 | void (*SetStopFrame)(struct S_AudioFilePlayer *afp, int frame); /* set limit in the file */ |
| 78 | int (*Connect)(struct S_AudioFilePlayer *afp); |
| 79 | void (*Disconnect)(struct S_AudioFilePlayer *afp); |
| 80 | void (*DoNotification)(struct S_AudioFilePlayer *afp, OSStatus inError); |
| 81 | int (*IsConnected)(struct S_AudioFilePlayer *afp); |
| 82 | AudioUnit (*GetDestUnit)(struct S_AudioFilePlayer *afp); |
| 83 | void (*Print)(struct S_AudioFilePlayer *afp); |
| 84 | |
| 85 | /*private:*/ |
| 86 | AudioUnit mPlayUnit; |
| 87 | FSIORefNum mForkRefNum; |
| 88 | |
| 89 | AURenderCallbackStruct mInputCallback; |
| 90 | |
| 91 | AudioStreamBasicDescription mFileDescription; |
| 92 | |
| 93 | int mConnected; |
| 94 | |
| 95 | struct S_AudioFileManager* mAudioFileManager; |
| 96 | |
| 97 | AudioFilePlayNotifier mNotifier; |
| 98 | void* mRefCon; |
| 99 | |
| 100 | int mStartFrame; |
| 101 | |
| 102 | #pragma mark __________ Private_Methods |
| 103 | |
| 104 | int (*OpenFile)(struct S_AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileSize); |
| 105 | } AudioFilePlayer; |
| 106 | |
| 107 | |
| 108 | AudioFilePlayer *new_AudioFilePlayer(const FSRef *inFileRef); |
| 109 | void delete_AudioFilePlayer(AudioFilePlayer *afp); |
| 110 | |
| 111 | |
| 112 | |
| 113 | #pragma mark __________ AudioFileManager |
| 114 | typedef struct S_AudioFileManager |
| 115 | { |
| 116 | /*public:*/ |
| 117 | /* this method should NOT be called by an object of this class |
| 118 | as it is called by the parent's Disconnect() method */ |
| 119 | void (*Disconnect)(struct S_AudioFileManager *afm); |
| 120 | int (*DoConnect)(struct S_AudioFileManager *afm); |
| 121 | OSStatus (*Read)(struct S_AudioFileManager *afm, char *buffer, ByteCount *len); |
| 122 | const char* (*GetFileBuffer)(struct S_AudioFileManager *afm); |
| 123 | const AudioFilePlayer *(*GetParent)(struct S_AudioFileManager *afm); |
| 124 | void (*SetPosition)(struct S_AudioFileManager *afm, SInt64 pos); /* seek/rewind in the file */ |
| 125 | int (*GetByteCounter)(struct S_AudioFileManager *afm); /* return actual bytes streamed to audio hardware */ |
| 126 | void (*SetEndOfFile)(struct S_AudioFileManager *afm, SInt64 pos); /* set the "EOF" (will behave just like it reached eof) */ |
| 127 | |
| 128 | /*protected:*/ |
| 129 | AudioFilePlayer* mParent; |
| 130 | SInt16 mForkRefNum; |
| 131 | SInt64 mAudioDataOffset; |
| 132 | |
| 133 | char* mFileBuffer; |
| 134 | |
| 135 | int mByteCounter; |
| 136 | |
| 137 | int mReadFromFirstBuffer; |
| 138 | int mLockUnsuccessful; |
| 139 | int mIsEngaged; |
| 140 | |
| 141 | int mNumTimesAskedSinceFinished; |
| 142 | |
| 143 | |
| 144 | void* mTmpBuffer; |
| 145 | UInt32 mBufferSize; |
| 146 | UInt32 mBufferOffset; |
| 147 | /*public:*/ |
| 148 | UInt32 mChunkSize; |
| 149 | SInt64 mFileLength; |
| 150 | SInt64 mReadFilePosition; |
| 151 | int mWriteToFirstBuffer; |
| 152 | int mFinishedReadingData; |
| 153 | |
| 154 | /*protected:*/ |
| 155 | OSStatus (*Render)(struct S_AudioFileManager *afm, AudioBufferList *ioData); |
| 156 | OSStatus (*GetFileData)(struct S_AudioFileManager *afm, void** inOutData, UInt32 *inOutDataSize); |
| 157 | void (*AfterRender)(struct S_AudioFileManager *afm); |
| 158 | |
| 159 | /*public:*/ |
| 160 | /*static*/ |
| 161 | OSStatus (*FileInputProc)(void *inRefCon, |
| 162 | AudioUnitRenderActionFlags *ioActionFlags, |
| 163 | const AudioTimeStamp *inTimeStamp, |
| 164 | UInt32 inBusNumber, |
| 165 | UInt32 inNumberFrames, |
| 166 | AudioBufferList *ioData); |
| 167 | } AudioFileManager; |
| 168 | |
| 169 | |
| 170 | AudioFileManager *new_AudioFileManager (AudioFilePlayer *inParent, |
| 171 | SInt16 inForkRefNum, |
| 172 | SInt64 inFileLength, |
| 173 | UInt32 inChunkSize); |
| 174 | |
| 175 | void delete_AudioFileManager(AudioFileManager *afm); |
| 176 | |
| 177 | #endif |
| 178 | |