oss_audio_render.h

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/*//////////////////////////////////////////////////////////////////////////////
//
//                  INTEL CORPORATION PROPRIETARY INFORMATION
//     This software is supplied under the terms of a license agreement or
//     nondisclosure agreement with Intel Corporation and may not be copied
//     or disclosed except in accordance with the terms of that agreement.
//          Copyright(c) 2003-2005 Intel Corporation. All Rights Reserved.
//
*/

//
//    This file contains audio render based on Open Sound System for UNIX and
//    UNIX-like systems (Particulary for Linux - we have no opportunity to test
//    other OSes) supporting /dev/dsp and /dev/mixer devices.
//

#ifdef UMC_ENABLE_OSS_AUDIO_RENDER
#ifndef __OSS_AUDIO_RENDER_H__
#define __OSS_AUDIO_RENDER_H__

#include "umc_structures.h"
#include "basic_audio_render.h"
#include "oss_dev.h"

namespace UMC
{
    class OSSAudioRender :public BasicAudioRender
    {
    public:
        OSSAudioRender();
        virtual ~OSSAudioRender() {   Close();     }

        virtual Status        Init(MediaReceiverParams* pInit);

        virtual Status        SendFrame(MediaData* in);

        virtual Status        Pause(bool pause);

        // Render manipulating
        // 0-silence 1-max, return previous volume
        virtual float         SetVolume(float volume);
        virtual float         GetVolume();

        virtual Status        Close (void);
        virtual Status        Reset (void);

        virtual Status  SetParams(MediaReceiverParams *params);

    protected:

        virtual double        GetTimeTick(void);

        OSSDev              m_Dev;
        double              m_dfStartPTS;
        vm_tick             m_tickStartTime;
        vm_tick             m_tickPrePauseTime;
    };
};  //  namespace UMC
#endif    //    __OSS_AUDIO_RENDER_H__
#endif  //  UMC_ENABLE_OSS_AUDIO_RENDER