/*+
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    SDL - Simple DirectMedia Layer+
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    Copyright (C) 1997-2004 Sam Lantinga+
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+
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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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+
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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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+
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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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+
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    Sam Lantinga+
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    slouken@libsdl.org+
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+
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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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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+
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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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+
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#include <CoreServices/CoreServices.h>+
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+
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#include <AudioUnit/AudioUnit.h>+
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+
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#include "SDL_error.h"+
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+
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const char* AudioFilePlayerErrorStr (OSStatus error);+
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+
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/*+
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void ThrowResult (OSStatus result, const char *str);+
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+
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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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+
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typedef void (*AudioFilePlayNotifier)(void          *inRefCon,+
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                                    OSStatus        inStatus);+
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+
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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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+
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+
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struct S_AudioFileManager;+
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+
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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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+
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//private:+
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    AudioUnit                       mPlayUnit;+
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    SInt16                          mForkRefNum;+
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    +
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    AudioUnitInputCallback          mInputCallback;+
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+
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    AudioStreamBasicDescription     mFileDescription;+
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    +
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    int                             mConnected;+
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    +
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    struct S_AudioFileManager*      mAudioFileManager;+
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    +
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    AudioFilePlayNotifier           mNotifier;+
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    void*                           mRefCon;+
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    +
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    int                             mStartFrame;+
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    +
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#pragma mark __________ Private_Methods+
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    +
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    int          (*OpenFile)(struct S_AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileSize);+
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} AudioFilePlayer;+
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+
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+
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AudioFilePlayer *new_AudioFilePlayer(const FSRef    *inFileRef);+
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void delete_AudioFilePlayer(AudioFilePlayer *afp);+
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+
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+
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+
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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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   +
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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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    +
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    char*               mFileBuffer;+
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+
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    int                 mByteCounter;+
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+
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    int                mReadFromFirstBuffer;+
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    int                mLockUnsuccessful;+
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    int                mIsEngaged;+
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    +
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    int                 mNumTimesAskedSinceFinished;+
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+
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+
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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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+
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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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+
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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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+
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+
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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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    +
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void delete_AudioFileManager(AudioFileManager *afm);+
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+
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#endif+
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+
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