/*

SDL - Simple DirectMedia Layer

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

*/

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

AudioFilePlayer.h

*/

#ifndef __AudioFilePlayer_H__

#define __AudioFilePlayer_H__

#include <CoreServices/CoreServices.h>

#include <AudioUnit/AudioUnit.h>

#ifdef AVAILABLE_MAC_OS_X_VERSION_10_5_AND_LATER

#include <AudioUnit/AUNTComponent.h>

#endif

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

};

#pragma mark __________ AudioFilePlayer

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);

AudioUnitInputCallback mInputCallback;

AudioStreamBasicDescription mFileDescription;

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

/*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, UInt32 *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) */

SInt16 mForkRefNum;

SInt64 mAudioDataOffset;

int mByteCounter;

int mReadFromFirstBuffer;

int mLockUnsuccessful;

int mIsEngaged;

int mNumTimesAskedSinceFinished;

void* mTmpBuffer;

UInt32 mBufferSize;

UInt32 mBufferOffset;

SInt64 mFileLength;

SInt64 mReadFilePosition;

int mWriteToFirstBuffer;

int mFinishedReadingData;

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

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

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

/*public:*/

/*static*/

OSStatus (*FileInputProc)(void *inRefCon,

AudioUnitRenderActionFlags inActionFlags,

const AudioTimeStamp *inTimeStamp,

UInt32 inBusNumber,

AudioBuffer *ioData);

} AudioFileManager;

AudioFileManager *new_AudioFileManager (AudioFilePlayer *inParent,

SInt16 inForkRefNum,

SInt64 inFileLength,

UInt32 inChunkSize);

void delete_AudioFileManager(AudioFileManager *afm);