audio.h

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2002 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_DXR3_AUDIO_H
#define DXR3PLAYER_DXR3_AUDIO_H
//------------------------------------------------------------------------------

#include "Stream.h"

#include "enums.h"
#include "types.h"

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

namespace dxr3 {

class DXR3;

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

/**
 * Audio subdevice of the DXR3.
 */
class Audio
{
private:
    /**
     * The DXR3 we belong to.
     */
    DXR3& dxr3;

    /**
     * Our current audio mode.
     */
    audioMode_t audioMode;

    /**
     * The sample rate.
     */
    unsigned sampleRate;

    /**
     * Indicate if we have stereo output 
     */
    bool stereo;

    /**
     * The stream used to write to the device.
     */
    Stream stream;

private:
    /**
     * Construct the subdevice.
     */
    Audio(DXR3* dxr3);
    
    /**
     * Initialize the subdevice. It opens the audio device files.
     */
    void initialize(unsigned deviceNumber);

public:
    /**
     * Setup the audio device.
     *
     * @param s the audio mode
     * @param rate the sampling rate in Hz
     * @param s indicate if stereo or mono mode
     *
     * FIXME: might need more fine-grained control
     */
    void setup(audioMode_t mode, unsigned rate, bool s);

    /**
     * Get the audio mode.
     */
    audioMode_t getAudioMode() const;

    /**
     * Get the sample rate.
     */
    unsigned getSampleRate() const;

    /**
     * Indicate if we have stereo output.
     */
    bool isStereo() const;

    /**
     * Start audio playback (in synchronized mode).
     */
    void play();

    /**
     * Pause the audio playback.
     */
    void pause();

    /**
     * Stop the audio playback.
     */
    void stop();

    /**
     * Flush the audio FIFO
     */
    void flush();

    /**
     * Get the stream.
     */
    Stream& getStream();

private:
    /**
     * Execute the given MA command.
     */
    void executeCommand(int command);

    friend class DXR3;
};

//------------------------------------------------------------------------------
// Inline definitions
//------------------------------------------------------------------------------

inline Audio::Audio(DXR3* dxr3) : dxr3(*dxr3)
{
}

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

inline Stream& Audio::getStream()
{
    return stream;
}

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

inline audioMode_t Audio::getAudioMode() const
{
    return audioMode;
}

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

inline unsigned Audio::getSampleRate() const
{
    return sampleRate;
}

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

inline bool Audio::isStereo() const
{
    return stereo;
}

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

} /* namespace dxr3 */

//------------------------------------------------------------------------------
#endif // DXR3PLAYER_DXR3_AUDIO_H

// Local variables:
// mode: c++
// End: