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AudioFilePlayer.h
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/*
SDL - Simple DirectMedia Layer
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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
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
*/
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#include "SDL_config.h"
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/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
AudioFilePlayer.h
*/
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#ifndef __AudioFilePlayer_H__
#define __AudioFilePlayer_H__
#include <CoreServices/CoreServices.h>
#include <AudioUnit/AudioUnit.h>
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#ifdef AVAILABLE_MAC_OS_X_VERSION_10_5_AND_LATER
#include <AudioUnit/AUNTComponent.h>
#endif
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#include "SDL_error.h"
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const char *AudioFilePlayerErrorStr(OSStatus error);
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void ThrowResult (OSStatus result, const char *str);
#define THROW_RESULT(str) \
if (result) { \
ThrowResult (result, str); \
}
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typedef void (*AudioFilePlayNotifier) (void *inRefCon, OSStatus inStatus);
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kAudioFilePlayErr_FilePlayUnderrun = -10000,
kAudioFilePlay_FileIsFinished = -10001,
kAudioFilePlay_PlayerIsUninitialized = -10002
};
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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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/*public:*/
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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);
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/*private:*/
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AudioUnit mPlayUnit;
SInt16 mForkRefNum;
AudioUnitInputCallback mInputCallback;
AudioStreamBasicDescription mFileDescription;
int mConnected;
struct S_AudioFileManager *mAudioFileManager;
AudioFilePlayNotifier mNotifier;
void *mRefCon;
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);
void delete_AudioFilePlayer(AudioFilePlayer * afp);
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#pragma mark __________ AudioFileManager
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typedef struct S_AudioFileManager
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/*public:*/
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/* 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) */
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/*protected:*/
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AudioFilePlayer *mParent;
SInt16 mForkRefNum;
SInt64 mAudioDataOffset;
char *mFileBuffer;
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int mByteCounter;
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int mReadFromFirstBuffer;
int mLockUnsuccessful;
int mIsEngaged;
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int mNumTimesAskedSinceFinished;
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void *mTmpBuffer;
UInt32 mBufferSize;
UInt32 mBufferOffset;
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/*public:*/
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UInt32 mChunkSize;
SInt64 mFileLength;
SInt64 mReadFilePosition;
int mWriteToFirstBuffer;
int mFinishedReadingData;
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/*protected:*/
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OSStatus(*Render) (struct S_AudioFileManager * afm,
AudioBuffer * ioData);
OSStatus(*GetFileData) (struct S_AudioFileManager * afm,
void **inOutData, UInt32 * inOutDataSize);
void (*AfterRender) (struct S_AudioFileManager * afm);
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/*public:*/
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/*static */
OSStatus(*FileInputProc) (void *inRefCon,
AudioUnitRenderActionFlags inActionFlags,
const AudioTimeStamp * inTimeStamp,
UInt32 inBusNumber, AudioBuffer * ioData);
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} AudioFileManager;
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AudioFileManager *new_AudioFileManager(AudioFilePlayer * inParent,
SInt16 inForkRefNum,
SInt64 inFileLength,
UInt32 inChunkSize);
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void delete_AudioFileManager(AudioFileManager * afm);
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#endif
/* vi: set ts=4 sw=4 expandtab: */