/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Library General Public

    License as published by the Free Software Foundation; either

    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public

    License along with this library; if not, write to the Free

    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga

    slouken@libsdl.org

    This file based on Apple sample code. We haven't changed the file name, 

    so if you want to see the original search for it on apple.com/developer

*/

#include "SDL_config.h"

/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    AudioFilePlayer.h

*/

#ifndef __AudioFilePlayer_H__

#define __AudioFilePlayer_H__

#include <CoreServices/CoreServices.h>

#include <AudioUnit/AudioUnit.h>

#if MAC_OS_X_VERSION_MAX_ALLOWED <= 1050

#include <AudioUnit/AUNTComponent.h>

#endif

/* This typedef is included in the 10.5+ SDK headers. */

#ifndef MAC_OS_X_VERSION_10_5

typedef SInt16 FSIORefNum;

#endif

#include "SDL_error.h"

const char* AudioFilePlayerErrorStr (OSStatus error);

/*

void ThrowResult (OSStatus result, const char *str);

#define THROW_RESULT(str)                                       \

    if (result) {                                               \

        ThrowResult (result, str);                              \

    }

*/

typedef void (*AudioFilePlayNotifier)(void          *inRefCon,

                                    OSStatus        inStatus);

enum {

    kAudioFilePlayErr_FilePlayUnderrun = -10000,

    kAudioFilePlay_FileIsFinished = -10001,

    kAudioFilePlay_PlayerIsUninitialized = -10002

};

struct S_AudioFileManager;

#pragma mark __________ AudioFilePlayer

typedef struct S_AudioFilePlayer

{

/*public:*/

    int             (*SetDestination)(struct S_AudioFilePlayer *afp, AudioUnit *inDestUnit);

    void            (*SetNotifier)(struct S_AudioFilePlayer *afp, AudioFilePlayNotifier inNotifier, void *inRefCon);

    void            (*SetStartFrame)(struct S_AudioFilePlayer *afp, int frame); /* seek in the file */

    int             (*GetCurrentFrame)(struct S_AudioFilePlayer *afp); /* get the current frame position */

    void            (*SetStopFrame)(struct S_AudioFilePlayer *afp, int frame);   /* set limit in the file */

    int             (*Connect)(struct S_AudioFilePlayer *afp);

    void            (*Disconnect)(struct S_AudioFilePlayer *afp);

    void            (*DoNotification)(struct S_AudioFilePlayer *afp, OSStatus inError);

    int             (*IsConnected)(struct S_AudioFilePlayer *afp);

    AudioUnit       (*GetDestUnit)(struct S_AudioFilePlayer *afp);

    void            (*Print)(struct S_AudioFilePlayer *afp);

/*private:*/

    AudioUnit                       mPlayUnit;

    FSIORefNum                      mForkRefNum;

    AURenderCallbackStruct          mInputCallback;

    AudioStreamBasicDescription     mFileDescription;

    int                             mConnected;

    struct S_AudioFileManager*      mAudioFileManager;

    AudioFilePlayNotifier           mNotifier;

    void*                           mRefCon;

    int                             mStartFrame;

#pragma mark __________ Private_Methods

    int          (*OpenFile)(struct S_AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileSize);

} AudioFilePlayer;

AudioFilePlayer *new_AudioFilePlayer(const FSRef    *inFileRef);

void delete_AudioFilePlayer(AudioFilePlayer *afp);

#pragma mark __________ AudioFileManager

typedef struct S_AudioFileManager

{

/*public:*/

        /* this method should NOT be called by an object of this class

           as it is called by the parent's Disconnect() method */

    void                (*Disconnect)(struct S_AudioFileManager *afm);

    int                 (*DoConnect)(struct S_AudioFileManager *afm);

    OSStatus            (*Read)(struct S_AudioFileManager *afm, char *buffer, ByteCount *len);

    const char*         (*GetFileBuffer)(struct S_AudioFileManager *afm);

    const AudioFilePlayer *(*GetParent)(struct S_AudioFileManager *afm);

    void                (*SetPosition)(struct S_AudioFileManager *afm, SInt64 pos);  /* seek/rewind in the file */

    int                 (*GetByteCounter)(struct S_AudioFileManager *afm);  /* return actual bytes streamed to audio hardware */

    void                (*SetEndOfFile)(struct S_AudioFileManager *afm, SInt64 pos);  /* set the "EOF" (will behave just like it reached eof) */

/*protected:*/

    AudioFilePlayer*    mParent;

    SInt16              mForkRefNum;

    SInt64              mAudioDataOffset;

    char*               mFileBuffer;

    int                 mByteCounter;

    int                mReadFromFirstBuffer;

    int                mLockUnsuccessful;

    int                mIsEngaged;

    int                 mNumTimesAskedSinceFinished;

	void*               mTmpBuffer;

	UInt32              mBufferSize;

	UInt32              mBufferOffset;

/*public:*/

    UInt32              mChunkSize;

    SInt64              mFileLength;

    SInt64              mReadFilePosition;

    int                 mWriteToFirstBuffer;

    int                 mFinishedReadingData;

/*protected:*/

    OSStatus            (*Render)(struct S_AudioFileManager *afm, AudioBufferList *ioData);

    OSStatus            (*GetFileData)(struct S_AudioFileManager *afm, void** inOutData, UInt32 *inOutDataSize);

    void                (*AfterRender)(struct S_AudioFileManager *afm);

/*public:*/

    /*static*/

    OSStatus            (*FileInputProc)(void                            *inRefCon,

                                         AudioUnitRenderActionFlags      *ioActionFlags,

                                         const AudioTimeStamp            *inTimeStamp,

                                         UInt32                          inBusNumber,

                                         UInt32                          inNumberFrames,

                                         AudioBufferList                 *ioData);

} AudioFileManager;

AudioFileManager *new_AudioFileManager (AudioFilePlayer *inParent,

                      SInt16          inForkRefNum, 

                      SInt64          inFileLength,

                      UInt32          inChunkSize);

void delete_AudioFileManager(AudioFileManager *afm);

#endif