author | Sam Lantinga <slouken@libsdl.org> |
Sat, 21 Aug 2004 02:06:30 +0000 | |
changeset 935 | f8d5ddc7aef1 |
parent 769 | b8d311d90021 |
child 1143 | 71a2648acc75 |
permissions | -rw-r--r-- |
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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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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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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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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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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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class AudioFileManager; |
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#pragma mark __________ AudioFilePlayer |
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class AudioFilePlayer |
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{ |
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public: |
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AudioFilePlayer (const FSRef *inFileRef); |
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~AudioFilePlayer(); |
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void SetDestination (AudioUnit &inDestUnit); |
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void SetNotifier (AudioFilePlayNotifier inNotifier, void *inRefCon) |
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{ |
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mNotifier = inNotifier; |
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mRefCon = inRefCon; |
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} |
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void SetStartFrame (int frame); // seek in the file |
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int GetCurrentFrame (); // get the current frame position |
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void SetStopFrame (int frame); // set limit in the file |
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void Connect(); |
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void Disconnect(); |
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void DoNotification (OSStatus inError) const; |
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bool IsConnected () const { return mConnected; } |
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AudioUnit GetDestUnit () const { return mPlayUnit; } |
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#if DEBUG |
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void Print() const |
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{ |
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printf ("Is Connected:%s\n", (IsConnected() ? "true" : "false")); |
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printf ("- - - - - - - - - - - - - - \n"); |
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} |
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#endif |
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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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bool mConnected; |
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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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void OpenFile (const FSRef *inRef, SInt64& outFileSize); |
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}; |
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#pragma mark __________ AudioFileManager |
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class AudioFileManager |
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123 |
{ |
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public: |
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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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~AudioFileManager(); |
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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 (); |
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void DoConnect (); |
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OSStatus Read(char *buffer, UInt32 *len); |
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141 |
const char* GetFileBuffer () { return mFileBuffer; } |
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143 |
const AudioFilePlayer& GetParent () const { return mParent; } |
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void SetPosition (SInt64 pos); // seek/rewind in the file |
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int GetByteCounter () { return mByteCounter; } // return actual bytes streamed to audio hardware |
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void SetEndOfFile (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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bool mReadFromFirstBuffer; |
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bool mLockUnsuccessful; |
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bool 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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const UInt32 mChunkSize; |
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SInt64 mFileLength; |
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SInt64 mReadFilePosition; |
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bool mWriteToFirstBuffer; |
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bool mFinishedReadingData; |
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177 |
protected: |
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178 |
OSStatus Render (AudioBuffer &ioData); |
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OSStatus GetFileData (void** inOutData, UInt32 *inOutDataSize); |
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182 |
void AfterRender (); |
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184 |
public: |
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static OSStatus FileInputProc (void *inRefCon, |
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186 |
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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190 |
}; |
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193 |
#endif |