spuhandler.cc

来自「Linux下比较早的基于命令行的DVD播放器」· CC 代码 · 共 120 行

//
// Copyright (c) 2004 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 "SPUHandler.h"

#include "output/SystemTimer.h"

#include "unichrome/Unichrome.h"

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

using output::unichrome::SPUHandler;

using output::SystemTimer;

using dvd::packet::PacketQueue;

using unichrome::Unichrome;

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

SPUHandler::SPUHandler(PacketQueue& inputQueue, SystemTimer& timer,
                       Unichrome& videoDevice) :
    output::SPUHandler(inputQueue, timer),
    videoDevice(videoDevice)
{
}

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

void SPUHandler::setPalette(const unsigned* palette)
{
    videoDevice.setSPUPalette(palette);
}

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

void SPUHandler::update()
{
    if (!isDisplayable(PICTURE) && !isDisplayable(BUTTON)) {
        videoDevice.disableSPU();
        return;
    }

    size_t bufferWidth = 0, bufferHeight = 0;
    volatile unsigned char* buffer = 
        videoDevice.getSPUBuffer(bufferWidth, bufferHeight);
    
    if (buffer==0) return;
    
    for(size_t i = 0; i<bufferWidth*bufferHeight; ++i) {
        buffer[i] = 0x00;
    }
    
    update(PICTURE, buffer, bufferWidth);
    update(BUTTON, buffer, bufferWidth);

    videoDevice.enableSPU();
}

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

void SPUHandler::update(displayEntity_t displayEntity,
                        volatile unsigned char* buffer, size_t bufferWidth)
{
    if (!isDisplayable(displayEntity)) return;
    
    size_t pictureWidth, startX, startY, spuWidth, spuHeight;
    const unsigned char* pictureData =
        getVisiblePictureData(displayEntity, pictureWidth, 
                              startX, startY, spuWidth, spuHeight);
    
    size_t lineStart = bufferWidth * startY + startX;

    for(size_t i = 0; i<spuHeight; ++i, lineStart+=bufferWidth) 
    {
        volatile unsigned char* bufferLine = buffer + lineStart;
        size_t pictureLineNo = i;
        if (isWideScreen()) {
            pictureLineNo *= 3;
            pictureLineNo += 2;
            pictureLineNo /= 4;
        }

        const unsigned char* pictureLine = 
            pictureData + pictureLineNo * pictureWidth;

        for(size_t j = 0; j<spuWidth; ++j, ++pictureLine, ++bufferLine) 
        {
            unsigned pixel = *pictureLine;

            *bufferLine = 
                (getContrast(displayEntity, pixel)<<4) | 
                getColorIndex(displayEntity, pixel);
        }
    }
}

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