dxr3.cc

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

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

#include "DXR3.h"

#include "util/Config.h"

#include <linux/em8300.h>

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

using namespace dxr3;

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

DXR3::DXR3(unsigned deviceNumber) :
    deviceNumber(deviceNumber),
    video(this),
    overlay(this),
    audio(this)
{
    dev.open(deviceNumber, O_RDWR);

    const Config& config = Config::get();

    if (config.uploadMicrocode) {
        uploadMicrocode(config.microcodeFileName);
    }

    initializeSubdevices();
}

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

void DXR3::uploadMicrocode(void* data, size_t size)
{
    em8300_microcode_t microcode;
    
    microcode.ucode = data;
    microcode.ucode_size = size;

    dev.ioctl(EM8300_IOCTL_INIT, &microcode, "Failed to upload microcode");
}

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

void DXR3::uploadMicrocode(const char* fileName)
{
    int fd = POSIX::open(fileName, O_RDONLY, "Cannot open device %s", fileName);
    
    size_t size = static_cast<size_t>(POSIX::lseek(fd, 0, SEEK_END));
    POSIX::lseek(fd, 0, SEEK_SET);

    char* data = new char[size];

    POSIX::read(fd, data, size);
    
    close(fd);

    uploadMicrocode(data, size);

    delete[] data;
}

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

void DXR3::initializeSubdevices()
{
    overlay.initialize();
    video.initialize(deviceNumber);
    audio.initialize(deviceNumber);
}

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

inline void DXR3::waitCommand(int reg, int value)
{
    em8300_register_t regs;

    regs.microcode_register = 1;
    do {
        regs.reg = reg;
        dev.ioctl(EM8300_IOCTL_READREG, &regs, "Error waiting for the command register");
    } while(regs.val != value);
}

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

void DXR3::executeCommand(int commandRegister, int command,
                          int statusRegister, int expectedStatus)
{
    waitCommand(commandRegister, 0xffff);

    em8300_register_t regs;
    
    regs.reg = commandRegister;
    regs.val = command;
    
    dev.ioctl(EM8300_IOCTL_WRITEREG, &regs, "Error writing command %04x into register %04x",
              command, commandRegister);

    waitCommand(statusRegister, expectedStatus);

}

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