lircinputhandler.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 "LIRCInputHandler.h"
#include "InputListener.h"

#include "sched/Scheduler.h"

#include "util/Log.h"

#include <lirc/lirc_client.h>

#include <sys/un.h>

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

using input::LIRCInputHandler;

using sched::Scheduler;

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

LIRCInputHandler::LIRCInputHandler(InputListener& listener) :
    Schedulable("LIRCInputHandler", 16*1024),
    CommandInputHandler(listener),
    inputReadable("LIRCInputHandler", "inputReadable"),
    config(0),
    codeLength(0)
{
    int s = lirc_init("dxr3player", 1);
    
    if (s<0) {
        Log::warning("Could not open LIRC device, ignoring\n");
        return;
    }

    if (lirc_readconfig(0, &config, 0)!=0) {
        Log::warning("Could not read LIRC config, will throw away IR signals\n");
        lirc_deinit();
    }
    
    int flags = POSIX::fcntl(s, F_GETFL);
    flags |= O_NONBLOCK;
    POSIX::fcntl(s, F_GETFL, &flags);
    
    inputReadable.setFileDescriptor(s);
}

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

LIRCInputHandler::~LIRCInputHandler()
{
    if (config!=0) {
        lirc_freeconfig(config);
    }
    
    if (inputReadable.getFileDescriptor()>=0) {
        lirc_deinit();
    }
}

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

void LIRCInputHandler::run()
{
    Log::debug("LIRC input handler started\n");
    while(!shouldQuit() && inputReadable.getFileDescriptor()>=0) {
        clearInterrupt();

        if (Scheduler::waitInterruptible(inputReadable)) {
            char buffer[bufferLength];
            size_t len =
                POSIX::read(inputReadable.getFileDescriptor(), 
                            buffer, bufferLength);

            for(size_t i = 0; i<len; ++i) {
                add(buffer[i]);
            }
        }
        
    }

    Log::debug("LIRC input handler exiting\n");
}

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

void LIRCInputHandler::add(char c)
{
    codeBuffer[codeLength++] = c;
    
    if (c=='\n' || codeLength==(bufferLength-1)) {
        codeBuffer[codeLength] = '\0';
        
        Log::debug("LIRC code received: '%s'\n", codeBuffer);

        char* command = 0;
        while(lirc_code2char(config, codeBuffer, &command)==0 && command!=0) {
            Log::debug("Translated LIRC command: '%s'\n", command);
            processCommand(command);
        }
        codeLength = 0;
    }
}

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