src/cdrom/macosx/AudioFilePlayer.h
author Ryan C. Gordon <icculus@icculus.org>
Thu, 22 Sep 2005 08:48:16 +0000
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parent 935 f8d5ddc7aef1
child 1402 d910939febfa
permissions -rw-r--r--
Replaced Mac OS X's C++ cdrom code with almost-direct translation to C. Sam requested this effort on the mailing list, apparently because of binary compatibility issues between 10.4 and earlier systems (or gcc4 and earlier compilers?). Works fine with SDL12/test/testcdrom.c, with this command line: ./testcdrom -status -list -play -sleep 5000 -pause -sleep 3000 -resume \ -sleep 5000 -stop -sleep 3000 -play -sleep 3000 -stop \ -sleep 3000 -eject Unix Makefiles work, XCode project still need updating for new filenames.
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/*
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    SDL - Simple DirectMedia Layer
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b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
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    Copyright (C) 1997-2004 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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    This file based on Apple sample code. We haven't changed the file name, 
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    so if you want to see the original search for it on apple.com/developer
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*/
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//  AudioFilePlayer.h
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//
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#ifndef __AudioFilePlayer_H__
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#define __AudioFilePlayer_H__
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#include <CoreServices/CoreServices.h>
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#include <AudioUnit/AudioUnit.h>
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#include "SDL_error.h"
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const char* AudioFilePlayerErrorStr (OSStatus error);
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/*
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void ThrowResult (OSStatus result, const char *str);
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#define THROW_RESULT(str)                                       \
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    if (result) {                                               \
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        ThrowResult (result, str);                              \
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    }
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*/
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typedef void (*AudioFilePlayNotifier)(void          *inRefCon,
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                                    OSStatus        inStatus);
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enum {
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    kAudioFilePlayErr_FilePlayUnderrun = -10000,
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    kAudioFilePlay_FileIsFinished = -10001,
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    kAudioFilePlay_PlayerIsUninitialized = -10002
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};
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struct S_AudioFileManager;
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#pragma mark __________ AudioFilePlayer
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typedef struct S_AudioFilePlayer
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{
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//public:
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    int             (*SetDestination)(struct S_AudioFilePlayer *afp, AudioUnit *inDestUnit);
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    void            (*SetNotifier)(struct S_AudioFilePlayer *afp, AudioFilePlayNotifier inNotifier, void *inRefCon);
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    void            (*SetStartFrame)(struct S_AudioFilePlayer *afp, int frame); // seek in the file
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    int             (*GetCurrentFrame)(struct S_AudioFilePlayer *afp); // get the current frame position
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    void            (*SetStopFrame)(struct S_AudioFilePlayer *afp, int frame);   // set limit in the file
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    int             (*Connect)(struct S_AudioFilePlayer *afp);
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    void            (*Disconnect)(struct S_AudioFilePlayer *afp);
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    void            (*DoNotification)(struct S_AudioFilePlayer *afp, OSStatus inError);
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    int             (*IsConnected)(struct S_AudioFilePlayer *afp);
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    AudioUnit       (*GetDestUnit)(struct S_AudioFilePlayer *afp);
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    void            (*Print)(struct S_AudioFilePlayer *afp);
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//private:
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    AudioUnit                       mPlayUnit;
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    SInt16                          mForkRefNum;
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    AudioUnitInputCallback          mInputCallback;
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    AudioStreamBasicDescription     mFileDescription;
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    int                             mConnected;
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    struct S_AudioFileManager*      mAudioFileManager;
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    AudioFilePlayNotifier           mNotifier;
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    void*                           mRefCon;
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    int                             mStartFrame;
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#pragma mark __________ Private_Methods
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    int          (*OpenFile)(struct S_AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileSize);
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} AudioFilePlayer;
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AudioFilePlayer *new_AudioFilePlayer(const FSRef    *inFileRef);
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void delete_AudioFilePlayer(AudioFilePlayer *afp);
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#pragma mark __________ AudioFileManager
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typedef struct S_AudioFileManager
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{
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//public:
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        // this method should NOT be called by an object of this class
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        // as it is called by the parent's Disconnect() method
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    void                (*Disconnect)(struct S_AudioFileManager *afm);
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    int                 (*DoConnect)(struct S_AudioFileManager *afm);
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    OSStatus            (*Read)(struct S_AudioFileManager *afm, char *buffer, UInt32 *len);
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    const char*         (*GetFileBuffer)(struct S_AudioFileManager *afm);
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    const AudioFilePlayer *(*GetParent)(struct S_AudioFileManager *afm);
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    void                (*SetPosition)(struct S_AudioFileManager *afm, SInt64 pos);  // seek/rewind in the file
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    int                 (*GetByteCounter)(struct S_AudioFileManager *afm);  // return actual bytes streamed to audio hardware
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    void                (*SetEndOfFile)(struct S_AudioFileManager *afm, SInt64 pos);  // set the "EOF" (will behave just like it reached eof)
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//protected:
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    AudioFilePlayer*    mParent;
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    SInt16              mForkRefNum;
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    SInt64              mAudioDataOffset;
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    char*               mFileBuffer;
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    int                 mByteCounter;
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    int                mReadFromFirstBuffer;
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    int                mLockUnsuccessful;
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    int                mIsEngaged;
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    int                 mNumTimesAskedSinceFinished;
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	void*               mTmpBuffer;
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	UInt32              mBufferSize;
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	UInt32              mBufferOffset;
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//public:
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    UInt32              mChunkSize;
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    SInt64              mFileLength;
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    SInt64              mReadFilePosition;
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    int                 mWriteToFirstBuffer;
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    int                 mFinishedReadingData;
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//protected:
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    OSStatus            (*Render)(struct S_AudioFileManager *afm, AudioBuffer *ioData);
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    OSStatus            (*GetFileData)(struct S_AudioFileManager *afm, void** inOutData, UInt32 *inOutDataSize);
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    void                (*AfterRender)(struct S_AudioFileManager *afm);
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//public:
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    //static
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    OSStatus            (*FileInputProc)(void                             *inRefCon,
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                                         AudioUnitRenderActionFlags      inActionFlags,
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                                         const AudioTimeStamp            *inTimeStamp,
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                                         UInt32                          inBusNumber,
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                                         AudioBuffer                     *ioData);
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} AudioFileManager;
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AudioFileManager *new_AudioFileManager (AudioFilePlayer *inParent,
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                      SInt16          inForkRefNum, 
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                      SInt64          inFileLength,
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                      UInt32          inChunkSize);
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void delete_AudioFileManager(AudioFileManager *afm);
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#endif
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