acmtransformer.h

rtp在linux下的实现

// ACMTransformer.h: interface for the ACMTransformer class.
//
//////////////////////////////////////////////////////////////////////

#ifndef AFX_ACMTRANSFORMER_H__86E322E0_F705_4ED1_9572_2A65C9105F62__INCLUDED_
#define AFX_ACMTRANSFORMER_H__86E322E0_F705_4ED1_9572_2A65C9105F62__INCLUDED_

#include <mmreg.h>
#include <Msacm.h>
#include <mmsystem.h>
#include <queue>
#include <list>

#include "AudioTransformer.h"
#include "Parameters.h"

#define	ACMTRANSFORMER_NUM_STREAMHEADER	1

class ACMTransformer : public AudioTransformer
{
public:
	ACMTransformer();
	virtual ~ACMTransformer();
	SetSourceFormat(WAVEFORMATEX &wfxSource);
	SetDestinationFormat(WAVEFORMATEX &wfxDest);
	int StartTransform();
	int StopTransform();
	int SetOutputDuration(int millisecs);
protected:
	virtual int TransformAudioSamples(std::vector<std::pair<AudioSample *, AudioSource *> > &data, AudioSample **ppAudioSample);
	virtual int SetTraceLevel();
	int			RenderAudioSamples(std::vector<std::pair<AudioSample *, AudioSource *> > &data);
	int			GenerateData(AudioSample **ppAudioSample);
private:
	ACMSTREAMHEADER		*GetBuffer();
	void				ReleaseBuffer(ACMSTREAMHEADER *acmHdr);
	bool				IsRunning();
	void				SetRunning(bool isRunning);
	int					AddConvertedData(unsigned char *dataIn, int numBytes);
	static void CALLBACK ACMCallback(HACMSTREAM has, UINT uMsg, DWORD dwInstance, LPARAM lParam1, LPARAM lParam2);
private:
	WAVEFORMATEX		sourceFormat;
	WAVEFORMATEX		destFormat;
	HACMSTREAM			hACMStream;
	ACMSTREAMHEADER		acmStreamHeader[ACMTRANSFORMER_NUM_STREAMHEADER];
	unsigned char		sourceBuffer[ACMTRANSFORMER_NUM_STREAMHEADER][ACMTRANSFORMER_MAX_SOURCEBUFFERSIZE];
	unsigned char		destBuffer[ACMTRANSFORMER_NUM_STREAMHEADER][ACMTRANSFORMER_MAX_DESTBUFFERSIZE];
	std::queue<unsigned char> outputQueue;
	std::list<ACMSTREAMHEADER *> freeBuffers;
	CRITICAL_SECTION	outputQueueMutex;
	CRITICAL_SECTION	freeBuffersMutex;
	CRITICAL_SECTION	stateMutex;
	HANDLE				freeBuffersEvent;
	HANDLE				outputEnqueueEvent;
	HANDLE				outputDequeueEvent;
	int					outputDuration;
	bool				bRunning;
};

#endif // !defined(AFX_ACMTRANSFORMER_H__86E322E0_F705_4ED1_9572_2A65C9105F62__INCLUDED_)