processorcommandqueue.cc

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2003 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 "ProcessorCommandQueue.h"

#include "ProcessorCommand.h"
#include "Processor.h"

#include "util/Log.h"

#include <cassert>

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

using dvd::vm::ProcessorCommandQueue;
using dvd::vm::ProcessorCommand;
using dvd::vm::Processor;

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

void ProcessorCommandQueue::reset()
{
    while(!commandList.empty()) {
        ProcessorCommand* command = commandList.front();
        commandList.pop_front();
        delete command;
    }
}

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

void ProcessorCommandQueue::put(ProcessorCommand* command)
{
    commandList.push_back(command);
}

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

void ProcessorCommandQueue::setState(Processor& processor, size_t commandID)
{
    assert(!commandList.empty());

    ProcessorCommand* command = commandList.front();
    assert(command->checkID(commandID));
    commandList.pop_front();

    processor.setState(command->getState());

    delete command;
}

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

bool ProcessorCommandQueue::updateStates(State& state)
{
    Processor processor(state);

    const State& processorState = processor.getState();

    for(commandList_t::iterator i = commandList.begin();
        i!=commandList.end(); ++i)
    {
        ProcessorCommand* command = *i;
        
        command->update(processor);
        
        if (processorState.getPosition()==command->getState().getPosition())
        {
            command->setState(processorState);
        } else {
            return false;
        }
    }
    
    state = processorState;

    return true;
}

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