mipaudiofileinput.h

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/*
    
  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 MIPAUDIOFILEINPUT_H

#define MIPAUDIOFILEINPUT_H

#include "mipconfig.h"

#ifdef MIPCONFIG_SUPPORT_AUDIOFILE

#include "mipcomponent.h"
#include "miprawaudiomessage.h"
#include "miptime.h"
#include <audiofile.h>
#include <string>

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

        bool open(const std::string &fname, int frames, bool loop = true);
        
        bool open(const std::string &fname, MIPTime interval, bool loop = true);

        bool close();

        int getSamplingRate() const                                                             { if (m_audiofileHandle) return m_sampRate; return 0; }
        
        int getNumberOfFrames() const                                                           { if (m_audiofileHandle) return m_numFrames; return 0; }

        int getNumberOfChannels() const                                                         { if (m_audiofileHandle) return m_numChannels; return 0; }

        MIPRaw16bitAudioMessage::SampleEncoding getSampleEncoding() const                       { if (m_audiofileHandle) return m_sampleEncoding; return MIPRaw16bitAudioMessage::Native; }

        void setSourceID(uint64_t sourceID)                                                     { m_sourceID = sourceID; }

        bool push(const MIPComponentChain &chain, int64_t iteration, MIPMessage *pMsg);
        bool pull(const MIPComponentChain &chain, int64_t iteration, MIPMessage **pMsg);
protected:
        virtual void onLastInputFrame()                                                         { }
private:
        AFfilehandle m_audiofileHandle;
        int m_sampRate;
        int m_numFrames;
        int m_numChannels;
        uint16_t *m_pFrames;
        MIPRaw16bitAudioMessage *m_pMsg;
        MIPRaw16bitAudioMessage::SampleEncoding m_sampleEncoding;
        bool m_gotMessage;
        bool m_loop, m_eof;
        uint64_t m_sourceID;
};

#endif // MIPCONFIG_SUPPORT_AUDIOFILE

#endif // MIPAUDIOFILEINPUT_H