audiodevice.h

Linux下比较早的基于命令行的DVD播放器

// Copyright (c) 2005 by Istv醤 V醨adi

// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card.

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef DXR3PLAYER_OUTPUT_DXR3_AUDIODEVICE_H
#define DXR3PLAYER_OUTPUT_DXR3_AUDIODEVICE_H
//------------------------------------------------------------------------------

#include "output/AudioDevice.h"

#include "sched/FDWaitCondition.h"

//------------------------------------------------------------------------------

namespace dxr3 {

class Audio;

} /* namespace dxr3 */

//------------------------------------------------------------------------------

namespace output { namespace dxr3 {

//------------------------------------------------------------------------------

/**
 * The DXR3 audio device.
 */
class AudioDevice : public output::AudioDevice
{
private:
    /**
     * The real DXR3 audio subdevice.
     */
    ::dxr3::Audio& device;

    /**
     * Waiting condition for the audio output stream.
     */
    sched::FDWritableWaitCondition audioWritable;

public:
    /**
     * Construct the audio device for the given DXR3 audio subdevice.
     */
    AudioDevice(::dxr3::Audio& device);

    /**
     * Start playback on the card.
     */
    virtual void startPlayback();

    /**
     * Write the given data to the card. It returns when all data has
     * been written or when the playback has been stopped by a call
     * to stopPlayback().
     */
    virtual size_t play(const void* d, size_t length, bool interruptible = true);

    /**
     * Get the number of samples played since starting the playback.
     * Since this device is not real-time, this function aborts.
     */
    virtual unsigned long long getNumberOfSamplesPlayed();

    /**
     * Get the number of samples currently buffered.
     * Since this device is not real-time, this function aborts.
     */
    virtual unsigned long long getNumberOfSamplesBuffered();

    /**
     * Stop the playback.
     */
    virtual void stopPlayback();

    /**
     * Stop the audio device.
     */
    virtual void stop();

private:
    /**
     * Setup the audio device.
     *
     * @param s the audio mode
     * @param rate the sampling rate in Hz
     * @param s indicate if stereo or mono mode
     */
    virtual void doSetup(audioMode_t& mode, unsigned& rate, bool& s);
};

//------------------------------------------------------------------------------

} /* namespace output::dxr3 */ } /* namespace output */

//------------------------------------------------------------------------------
#endif // DXR3PLAYER_OUTPUT_DXR3_DXR3AUDIODEVICE_H

// Local Variables:
// mode: C++
// c-basic-offset: 4
// indent-tabs-mode: nil
// End: