src/cdrom/macosx/AudioFilePlayer.h
author Sam Lantinga <slouken@libsdl.org>
Tue, 21 Feb 2006 08:46:50 +0000
changeset 1402 d910939febfa
parent 1143 71a2648acc75
child 1487 dc6b59e925a2
permissions -rw-r--r--
Use consistent identifiers for the various platforms we support.
Make sure every source file includes SDL_config.h, so the proper system
headers are chosen.
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/*
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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
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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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#include "SDL_config.h"
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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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