/*
File: AQPlayer.h
Abstract: Helper class for playing audio files via the AudioQueue
Version: 2.4
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*/
#include <AudioToolbox/AudioToolbox.h>
#include "CAStreamBasicDescription.h"
#include "CAXException.h"
#define kNumberBuffers 3
#define kBufferDurationSeconds 0.5
class AQPlayer
{
public:
AQPlayer();
~AQPlayer();
OSStatus StartQueue(BOOL inResume);
OSStatus StopQueue();
OSStatus PauseQueue();
AudioQueueRef Queue() { return mQueue; }
CAStreamBasicDescription DataFormat() const { return mDataFormat; }
Boolean IsRunning() const { return (mIsRunning) ? true : false; }
Boolean IsInitialized() const { return mIsInitialized; }
CFStringRef GetFilePath() const { return (mFilePath) ? mFilePath : CFSTR(""); }
Boolean IsLooping() const { return mIsLooping; }
void SetLooping(Boolean inIsLooping) { mIsLooping = inIsLooping; }
void CreateQueueForFile(CFStringRef inFilePath);
void DisposeQueue(Boolean inDisposeFile);
private:
UInt32 GetNumPacketsToRead() { return mNumPacketsToRead; }
SInt64 GetCurrentPacket() { return mCurrentPacket; }
AudioFileID GetAudioFileID() { return mAudioFile; }
void SetCurrentPacket(SInt64 inPacket) { mCurrentPacket = inPacket; }
void SetupNewQueue();
AudioQueueRef mQueue;
AudioQueueBufferRef mBuffers[kNumberBuffers];
AudioFileID mAudioFile;
CFStringRef mFilePath;
CAStreamBasicDescription mDataFormat;
Boolean mIsInitialized;
UInt32 mNumPacketsToRead;
SInt64 mCurrentPacket;
UInt32 mIsRunning;
Boolean mIsDone;
Boolean mIsLooping;
static void isRunningProc( void * inUserData,
AudioQueueRef inAQ,
AudioQueuePropertyID inID);
static void AQBufferCallback( void * inUserData,
AudioQueueRef inAQ,
AudioQueueBufferRef inCompleteAQBuffer);
void CalculateBytesForTime( CAStreamBasicDescription & inDesc,
UInt32 inMaxPacketSize,
Float64 inSeconds,
UInt32 *outBufferSize,
UInt32 *outNumPackets);
};
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