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view src/audio/symbian/streamplayer.h @ 4357:a10dac5858fe SDL-1.2

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Recommendation from Lennart Poettering: In ALSA_OpenAudio(): instead of setting period_size+n_periods OR buffer_size I'd recommend copying the hwparams stuff before you do this, then first try period_size+n_periods, and then apply it with snd_pcm_hw_params() and check if that works. If it didn't you should take the copy of hwparams and try setting buffer_size and apply that via snd_pcm_hw_params() and check if that worked. And if that failed too, then take the copy and don't apply neither period nor buffer settings and see if that works.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 19 Oct 2009 02:23:21 +0000
parents e85e65aec22f
children
line wrap: on
line source

#ifndef STREAMPLAYER_H
#define STREAMPLAYER_H

#include<MdaAudioOutputStream.h>

const TInt KSilenceBuffer = 256;

class MStreamObs
    {
    public:
    	enum 
    	{
    	EInit, 
    	EPlay,
    	EWrite,
    	EClose,	
    	};
        virtual void Complete(TInt aState, TInt aError) = 0;
    };

class MStreamProvider
	{
	public:
		virtual TPtrC8 Data() = 0;	
	};

NONSHARABLE_CLASS(CStreamPlayer) : public CBase, public MMdaAudioOutputStreamCallback
	{
	public:
		CStreamPlayer(MStreamProvider& aProvider, MStreamObs& aObs);
		~CStreamPlayer();
		void ConstructL();
		
		static TInt ClosestSupportedRate(TInt aRate);
		
		TInt OpenStream(TInt aRate, TInt aChannels, TUint32 aType = KMMFFourCCCodePCM16);
		
		void SetVolume(TInt aNew);
		TInt Volume() const;
		TInt MaxVolume() const;
		
		void Stop();
		void Start();
		void Open();
		void Close();
		
		TBool Playing() const;
		TBool Closed() const;
		
	private:

		void MaoscOpenComplete(TInt aError) ;
		void MaoscBufferCopied(TInt aError, const TDesC8& aBuffer);
		void MaoscPlayComplete(TInt aError);
	
	private:
		void Request();
		void SetCapsL();

	private:
		MStreamProvider& iProvider;
		MStreamObs& iObs;	
		TInt iVolume;
	
		CMdaAudioOutputStream* iStream;
	
		TInt iRate;
		TInt iChannels;
		TUint32 iType;
		
		enum 
			{
				ENone = 0,
				EInited = 0x1,
				EStarted = 0x2,
				EStopped = 0x4,
				EVolumeChange = 0x8,
				EDied		  = 0x10
			};
		
		TInt iState;
		TBuf8<KSilenceBuffer> iSilence;
		TPtrC8 iPtr;
	
	};


#endif