audiodevice.cc

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

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

#include "AudioDevice.h"

#include "dxr3/Audio.h"

#include "sched/Scheduler.h"

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

using output::dxr3::AudioDevice;

using dxr3::Audio;
using dxr3::Stream;

using sched::Scheduler;

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

AudioDevice::AudioDevice(Audio& device) :
    device(device),
    audioWritable("output::dxr3::AudioDevice", "audioWritable",
                  device.getStream())
{
    realTime = false;
    triggerable = true;
}

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

void AudioDevice::startPlayback()
{
    device.play();
}

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

size_t AudioDevice::play(const void* d, size_t length, bool interruptible)
{
    const unsigned char* buffer = reinterpret_cast<const unsigned char*>(d);

    Stream& audioStream = device.getStream();

    size_t offset = 0;
    while((!Scheduler::isInterrupted() || !interruptible) && offset<length) {
        size_t written = audioStream.write(buffer + offset, length - offset);

        if (written==0) {
            if (interruptible) {
                Scheduler::waitInterruptible(audioWritable);
            } else {
                Scheduler::wait(audioWritable);
            }
        } else {
            offset += written;
        }
    }

    return offset;
}

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

unsigned long long AudioDevice::getNumberOfSamplesPlayed()
{
    abort();
}

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

unsigned long long AudioDevice::getNumberOfSamplesBuffered()
{
    abort();
}

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

void AudioDevice::stopPlayback()
{
    device.stop();
    device.flush();
}

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

void AudioDevice::stop()
{
}

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

void AudioDevice::doSetup(audioMode_t& mode, unsigned& rate, bool& s)
{
    device.setup(mode, rate, s);
}

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

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