mipwinmmoutput.h

Go to the documentation of this file.

/*
    
  This file is a part of EMIPLIB, the EDM Media over IP Library.
  
  Copyright (C) 2006-2011  Hasselt University - Expertise Centre for
                      Digital Media (EDM) (http://www.edm.uhasselt.be)

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  
  USA

*/

#ifndef MIPWINMMOUTPUT_H

#define MIPWINMMOUTPUT_H

#include "mipconfig.h"

#ifdef MIPCONFIG_SUPPORT_WINMM

#include "mipcomponent.h"
#include "miptime.h"
#include "mipsignalwaiter.h"
#include <jthread/jmutex.h>
#include <windows.h>
#ifndef _WIN32_WCE
        #include <mmsystem.h>
#endif // _WIN32_WCE

class EMIPLIB_IMPORTEXPORT MIPWinMMOutput : public MIPComponent
{
public:
        MIPWinMMOutput();
        ~MIPWinMMOutput();

        bool open(int sampRate, int channels, MIPTime blockTime = MIPTime(0.020),
                  MIPTime bufferTime = MIPTime(10.0), bool highPriority = false,
                  UINT deviceID = WAVE_MAPPER);

        bool close();

        bool push(const MIPComponentChain &chain, int64_t iteration, MIPMessage *pMsg);
        bool pull(const MIPComponentChain &chain, int64_t iteration, MIPMessage **pMsg);
private:
        static void CALLBACK outputCallback(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance, DWORD dwParam1, DWORD dwParam2);

        bool m_init;
        HWAVEOUT m_device;
        int m_sampRate;
        int m_channels;
        WAVEHDR *m_frameArray;
        int m_numBlocks;
        size_t m_blockLength, m_blockFrames;
        int m_blockPos, m_blocksInitialized;
        jthread::JMutex m_bufCountMutex;
        int m_bufCount, m_prevBufCount;
        bool m_flushBuffers;
        MIPTime m_prevCheckTime;
        MIPTime m_delay;
        bool m_threadPrioritySet;
};

#endif // MIPCONFIG_SUPPORT_WINMM

#endif // MIPWINMMOUTPUT_H