org.jfxvnc.net.rfb.codec.decoder.rect.RawRectDecoder.java Source code

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Here is the source code for org.jfxvnc.net.rfb.codec.decoder.rect.RawRectDecoder.java

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/*******************************************************************************
 * Copyright (c) 2016 comtel inc.
 *
 * Licensed under the Apache License, version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 *******************************************************************************/
package org.jfxvnc.net.rfb.codec.decoder.rect;

import java.util.List;

import org.jfxvnc.net.rfb.codec.PixelFormat;
import org.jfxvnc.net.rfb.render.rect.RawImageRect;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.PooledByteBufAllocator;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;

public class RawRectDecoder implements FrameRectDecoder {

    private static Logger logger = LoggerFactory.getLogger(RawRectDecoder.class);

    protected final PooledByteBufAllocator aloc = new PooledByteBufAllocator();

    protected int capacity;
    protected FrameRect rect;
    protected PixelFormat pixelFormat;

    protected ByteBuf framebuffer;

    protected final int redPos;
    protected final int bluePos;

    public RawRectDecoder(PixelFormat pixelFormat) {
        this.pixelFormat = pixelFormat;
        this.redPos = pixelFormat.isBigEndian() ? 0 : 2;
        this.bluePos = pixelFormat.isBigEndian() ? 2 : 0;
    }

    @Override
    public boolean decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
        if (framebuffer == null) {
            framebuffer = Unpooled.unreleasableBuffer(ctx.alloc().buffer(capacity));
        } else if (framebuffer.capacity() != capacity) {
            framebuffer.capacity(capacity);
        }

        if (framebuffer.isWritable() && in.isReadable()) {
            logger.trace("readable/writable {}/{}", in.readableBytes(), framebuffer.writableBytes());
            framebuffer.writeBytes(in, Math.min(in.readableBytes(), framebuffer.writableBytes()));
        }
        if (!framebuffer.isWritable()) {
            logger.trace("read {} raw bytes completed", framebuffer.readableBytes());
            sendRect(out);
            framebuffer.clear();
            return true;
        }
        return false;
    }

    @Override
    public void setRect(FrameRect rect) {
        if (framebuffer == null || framebuffer.writerIndex() == 0) {
            this.rect = rect;
            this.capacity = rect.getWidth() * rect.getHeight() * pixelFormat.getBytePerPixel();
        }

    }

    protected void sendRect(List<Object> out) {
        int i = 0;
        // ByteBuf pixels = aloc.buffer(capacity);
        // while (pixels.isWritable()) {
        // pixels.writeInt(framebuffer.getUnsignedByte(i + redPos) << pixelFormat.getRedShift()
        // | framebuffer.getUnsignedByte(i + 1) << pixelFormat.getGreenShift()
        // | framebuffer.getUnsignedByte(i + bluePos) << pixelFormat.getBlueShift() | 0xff000000);
        // i+=4;
        // }

        if (pixelFormat.getBytePerPixel() == 1) {
            out.add(new RawImageRect(rect.getX(), rect.getY(), rect.getWidth(), rect.getHeight(),
                    framebuffer.copy(), rect.getWidth()));
            return;
        }

        // reduce 4 byte to 3 byte
        int size = capacity - (capacity / 4);
        ByteBuf pixels = aloc.buffer(size, size);
        while (pixels.isWritable()) {
            pixels.writeByte(framebuffer.getUnsignedByte(i + redPos));
            pixels.writeByte(framebuffer.getUnsignedByte(i + 1));
            pixels.writeByte(framebuffer.getUnsignedByte(i + bluePos));
            i += 4;
        }
        out.add(new RawImageRect(rect.getX(), rect.getY(), rect.getWidth(), rect.getHeight(), pixels,
                rect.getWidth() * 3));

        // if (pixels.length > 5000) {
        // Arrays.parallelSetAll(pixels,
        // (i) -> framebuffer.getUnsignedByte(i * 4 + redPos) << pixelFormat.getRedShift()
        // | framebuffer.getUnsignedByte(i * 4 + 1) << pixelFormat.getGreenShift()
        // | framebuffer.getUnsignedByte(i * 4 + bluePos) << pixelFormat.getBlueShift() | 0xff000000);
        // } else {
        // Arrays.setAll(pixels,
        // (i) -> framebuffer.getUnsignedByte(i * 4 + redPos) << pixelFormat.getRedShift()
        // | framebuffer.getUnsignedByte(i * 4 + 1) << pixelFormat.getGreenShift()
        // | framebuffer.getUnsignedByte(i * 4 + bluePos) << pixelFormat.getBlueShift() | 0xff000000);
        // }

    }
}