Java Code Examples for java.nio.MappedByteBuffer#capacity()

The following examples show how to use java.nio.MappedByteBuffer#capacity() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: BasicRoutine.java    From SoftwarePilot with MIT License 6 votes vote down vote up 
byte[] read4k(){
    	try {
		File file = new File(Environment.getExternalStorageDirectory().getPath()+"/AUAVtmp/fullPic.JPG");
		//File file = new File("../tmp/pictmp.jpg");
		FileChannel fileChannel = new RandomAccessFile(file, "r").getChannel();
		MappedByteBuffer buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, fileChannel.size());
		pic = new byte[buffer.capacity()];
		while(buffer.hasRemaining()){
	    		int remaining = pic.length;
	    		if(buffer.remaining() < remaining){
				remaining = buffer.remaining();
	    		}
	    		buffer.get(pic, 0, remaining);
		}
		return pic;
    	} catch(Exception e){
		e.printStackTrace();
    	}
    	return new byte[0];
}
Example 2
Source File: YoloVisionTest.java    From SoftwarePilot with MIT License 6 votes vote down vote up 
byte[] read4k(){
    	try {
		File file = new File(Environment.getExternalStorageDirectory().getPath()+"/AUAVtmp/fullPic.JPG");
		//File file = new File("../tmp/pictmp.jpg");
		FileChannel fileChannel = new RandomAccessFile(file, "r").getChannel();
		MappedByteBuffer buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, fileChannel.size());
		pic = new byte[buffer.capacity()];
		while(buffer.hasRemaining()){
	    		int remaining = pic.length;
	    		if(buffer.remaining() < remaining){
				remaining = buffer.remaining();
	    		}
	    		buffer.get(pic, 0, remaining);
		}
		return pic;
    	} catch(Exception e){
		e.printStackTrace();
    	}
    	return new byte[0];
}
Example 3
Source File: AutoSelfie.java    From SoftwarePilot with MIT License 6 votes vote down vote up 
byte[] readImg(){
    try {
        //BufferedImage origImage = ImageIO.read(imgPath);
        //ByteArrayOutputStream baos = new ByteArrayOutputStream();
        //ImageIO.write(origImage, "jpg", baos);
        //return baos.toByteArray();

        File file = new File(Environment.getExternalStorageDirectory().getPath()+"/AUAVtmp/fullPic.JPG");
        //File file = new File("../tmp/pictmp.jpg");
        FileChannel fileChannel = new RandomAccessFile(file, "r").getChannel();
        MappedByteBuffer buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, fileChannel.size());
        pic = new byte[buffer.capacity()];
        while(buffer.hasRemaining()){
            int remaining = pic.length;
            if(buffer.remaining() < remaining){
                remaining = buffer.remaining();
            }
            buffer.get(pic, 0, remaining);
        }
        return pic;
    } catch(Exception e){
        e.printStackTrace();
    }
    return new byte[0];
}
Example 4
Source File: WaypointMissionTest.java    From SoftwarePilot with MIT License 6 votes vote down vote up 
byte[] readWaypoint(String fname){
	
      	    	//read in the file
    	try{
   		File f = new File(Environment.getExternalStorageDirectory().getPath()+fname);
		FileChannel fileChannel = new RandomAccessFile(f,"r").getChannel();
		MappedByteBuffer buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY,0,fileChannel.size());
		data = new byte[buffer.capacity()];
		while(buffer.hasRemaining()){
			int remaining = data.length;
			if (buffer.remaining()<remaining){
				remaining = buffer.remaining();
			}
			buffer.get(data,0,remaining);
		}
		return data;
	   }catch (IOException e) {
    	  	e.printStackTrace();   
	   }
	return new byte[0];
}
Example 5
Source File: WaypointMissionTest.java    From SoftwarePilot with MIT License 6 votes vote down vote up 
byte[] read4k(){
    try {
        File file = new File(Environment.getExternalStorageDirectory().getPath()+"/AUAVtmp/fullPic.JPG");
        //File file = new File("../tmp/pictmp.jpg");
        FileChannel fileChannel = new RandomAccessFile(file, "r").getChannel();
        MappedByteBuffer buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, fileChannel.size());
        pic = new byte[buffer.capacity()];
        while(buffer.hasRemaining()){
            int remaining = pic.length;
            if(buffer.remaining() < remaining){
                remaining = buffer.remaining();
            }
            buffer.get(pic, 0, remaining);
        }
        return pic;
    } catch(Exception e){
        e.printStackTrace();
    }
    return new byte[0];
}
Example 6
Source File: WaypointMissionTestBackup.java    From SoftwarePilot with MIT License 6 votes vote down vote up 
byte[] read4k(){
    try {
        File file = new File(Environment.getExternalStorageDirectory().getPath()+"/AUAVtmp/fullPic.JPG");
        //File file = new File("../tmp/pictmp.jpg");
        FileChannel fileChannel = new RandomAccessFile(file, "r").getChannel();
        MappedByteBuffer buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, fileChannel.size());
        pic = new byte[buffer.capacity()];
        while(buffer.hasRemaining()){
            int remaining = pic.length;
            if(buffer.remaining() < remaining){
                remaining = buffer.remaining();
            }
            buffer.get(pic, 0, remaining);
        }
        return pic;
    } catch(Exception e){
        e.printStackTrace();
    }
    return new byte[0];
}
Example 7
Source File: RoutineTemplate.java    From SoftwarePilot with MIT License 6 votes vote down vote up 
byte[] read4k(){
    try {
        File file = new File(Environment.getExternalStorageDirectory().getPath()+"/AUAVtmp/fullPic.JPG");
        //File file = new File("../tmp/pictmp.jpg");
        FileChannel fileChannel = new RandomAccessFile(file, "r").getChannel();
        MappedByteBuffer buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, fileChannel.size());
        pic = new byte[buffer.capacity()];
        while(buffer.hasRemaining()){
            int remaining = pic.length;
            if(buffer.remaining() < remaining){
                remaining = buffer.remaining();
            }
            buffer.get(pic, 0, remaining);
        }
        return pic;
    } catch(Exception e){
        e.printStackTrace();
    }
    return new byte[0];
}
Example 8
Source File: BasicVision.java    From SoftwarePilot with MIT License 6 votes vote down vote up 
byte[] read4k(){
    try {
        File file = new File(Environment.getExternalStorageDirectory().getPath()+"/AUAVtmp/fullPic.JPG");
        //File file = new File("../tmp/pictmp.jpg");
        FileChannel fileChannel = new RandomAccessFile(file, "r").getChannel();
        MappedByteBuffer buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, fileChannel.size());
        pic = new byte[buffer.capacity()];
        while(buffer.hasRemaining()){
            int remaining = pic.length;
            if(buffer.remaining() < remaining){
                remaining = buffer.remaining();
            }
            buffer.get(pic, 0, remaining);
        }
        return pic;
    } catch(Exception e){
        e.printStackTrace();
    }
    return new byte[0];
}
Example 9
Source File: CubeSim.java    From SoftwarePilot with MIT License 6 votes vote down vote up 
byte[] readImg(){
    try {
        //BufferedImage origImage = ImageIO.read(imgPath);
        //ByteArrayOutputStream baos = new ByteArrayOutputStream();
        //ImageIO.write(origImage, "jpg", baos);
        //return baos.toByteArray();

        //File file = new File(Environment.getExternalStorageDirectory().getPath()+"/AUAVtmp/fullPic.JPG");
        File file = new File("../tmp/pictmp.jpg");
        FileChannel fileChannel = new RandomAccessFile(file, "r").getChannel();
        MappedByteBuffer buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, fileChannel.size());
        byte[] pic = new byte[buffer.capacity()];
        while(buffer.hasRemaining()){
            int remaining = pic.length;
            if(buffer.remaining() < remaining){
                remaining = buffer.remaining();
            }
            buffer.get(pic, 0, remaining);
        }
        return pic;
    } catch(Exception e){
        e.printStackTrace();
    }
    return new byte[0];
}
Example 10
Source File: VisionTest.java    From SoftwarePilot with MIT License 6 votes vote down vote up 
byte[] readImg(){
    try {
        //BufferedImage origImage = ImageIO.read(imgPath);
        //ByteArrayOutputStream baos = new ByteArrayOutputStream();
        //ImageIO.write(origImage, "jpg", baos);
        //return baos.toByteArray();

        File file = new File(Environment.getExternalStorageDirectory().getPath()+"/AUAVtmp/fullPic.JPG");
        //File file = new File("../tmp/pictmp.jpg");
        FileChannel fileChannel = new RandomAccessFile(file, "r").getChannel();
        MappedByteBuffer buffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, fileChannel.size());
        byte[] pic = new byte[buffer.capacity()];
        while(buffer.hasRemaining()){
            int remaining = pic.length;
            if(buffer.remaining() < remaining){
                remaining = buffer.remaining();
            }
            buffer.get(pic, 0, remaining);
        }
        return pic;
    } catch(Exception e){
        e.printStackTrace();
    }
    return new byte[0];
}
Example 11
Source File: RdmaStorageLocalEndpoint.java    From crail with Apache License 2.0 6 votes vote down vote up 
public RdmaStorageLocalEndpoint(InetSocketAddress datanodeAddr) throws Exception {
	LOG.info("new local endpoint for address " + datanodeAddr);
	String dataPath = RdmaStorageServer.getDatanodeDirectory(datanodeAddr);
	File dataDir = new File(dataPath);
	if (!dataDir.exists()){
		throw new Exception("Local RDMA data path missing");
	}
	this.address = datanodeAddr;
	this.bufferMap = new ConcurrentHashMap<Long, CrailBuffer>();
	this.unsafe = getUnsafe();
	long lba = 0;
	for (File dataFile : dataDir.listFiles()) {
		MappedByteBuffer mappedBuffer = mmap(dataFile);
		bufferMap.put(lba, OffHeapBuffer.wrap(mappedBuffer));
		lba += mappedBuffer.capacity();
	}				
}
Example 12
Source File: FileUtil.java    From cc-dbp with Apache License 2.0 5 votes vote down vote up 
/**
 * get an input stream for the file that is fast, trading memory for speed
 * 
 * @param file
 * @return InputStream
 */
public static InputStream fastStream(File file) {
  FileInputStream fis = null;
  FileChannel ch = null;
  byte[] byteArray = null;
  try {
    fis = new FileInputStream(file);
    if (fis != null) {
      ch = fis.getChannel();
      if (ch.size() > 1000000000) {
      	return new BufferedInputStream(fis, BUFFER_SIZE);
      }
      MappedByteBuffer mb = ch.map(FileChannel.MapMode.READ_ONLY, 0L, ch.size());
      byteArray = new byte[mb.capacity()];
      int got;
      while (mb.hasRemaining()) {
        got = Math.min(mb.remaining(), byteArray.length);
        mb.get(byteArray, 0, got);
      }
    }
  } catch (FileNotFoundException fnfe) {
    throw new IOError(fnfe);
  } catch (IOException ioe) {
    throw new IOError(ioe);
  } finally {
    if (ch != null) {
      try {
        ch.close();
        fis.close();
      } catch (IOException ioe2) {
      }
    }
  }
  return new ByteArrayInputStream(byteArray);
}
Example 13
Source File: SpaceWarmer.java    From antsdb with GNU Lesser General Public License v3.0 5 votes vote down vote up 
@Override
public void run() {
    for (int i=this.sm.spaces.length-1; i>=0; i--) {
        Space ii = this.sm.spaces[i];
        if (ii != null) {
            MappedByteBuffer buf = ii.mmf.buf;
            for (int j=0; i<buf.capacity(); j+=0x100) {
                this.checksum ^= buf.get(j);
            }
        }
    }
}
Example 14
Source File: MappedMemory.java    From catalyst with Apache License 2.0 4 votes vote down vote up 
public MappedMemory(MappedByteBuffer buffer, MappedMemoryAllocator allocator) {
  super(((DirectBuffer) buffer).address(), buffer.capacity(), allocator);
  this.buffer = buffer;
}
Example 15
Source File: MappedMemory.java    From atomix with Apache License 2.0 4 votes vote down vote up 
public MappedMemory(MappedByteBuffer buffer, MappedMemoryAllocator allocator) {
  this.buffer = buffer;
  this.allocator = allocator;
  this.size = buffer.capacity();
}
Example 16
Source File: SegmentedRingByteBuffer.java    From ignite with Apache License 2.0 2 votes vote down vote up 
/**
 * Creates ring buffer with given capacity which mapped to file.
 *
 * @param buf {@link MappedByteBuffer} instance.
 * @param metrics Metrics.
 */
public SegmentedRingByteBuffer(MappedByteBuffer buf, DataStorageMetricsImpl metrics) {
    this(buf.capacity(), buf.capacity(), buf, MAPPED, metrics);
}