Example usage for java.nio ShortBuffer get

Introduction

In this page you can find the example usage for java.nio ShortBuffer get.

Prototype

public abstract short get();

Source Link

Document

Returns the short at the current position and increases the position by 1.

Usage

From source file:Main.java

public static void main(String[] args) {
    ShortBuffer bb = ShortBuffer.allocate(10);
    bb.put((short) 100);

    bb.rewind();// w  w  w  . j av a  2  s  .  c  o m
    System.out.println(bb.get());

}

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From source file:MainClass.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.wrap(new byte[] { 0, 0, 0, 0, 0, 0, 0, 'a' });
    bb.rewind();//from w ww  .ja  v  a 2s. c  o  m
    ShortBuffer sb = ((ByteBuffer) bb.rewind()).asShortBuffer();
    System.out.println("Short Buffer");
    while (sb.hasRemaining())
        System.out.println(sb.position() + " -> " + sb.get());

}

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From source file:Main.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.wrap(new byte[] { 0, 0, 0, 0, 0, 0, 0, 'a' });
    bb.rewind();/*from www  . j  av  a2s  . c o  m*/
    System.out.println("Byte Buffer");
    while (bb.hasRemaining())
        System.out.println(bb.position() + " -> " + bb.get());
    CharBuffer cb = ((ByteBuffer) bb.rewind()).asCharBuffer();
    System.out.println("Char Buffer");
    while (cb.hasRemaining())
        System.out.println(cb.position() + " -> " + cb.get());
    FloatBuffer fb = ((ByteBuffer) bb.rewind()).asFloatBuffer();
    System.out.println("Float Buffer");
    while (fb.hasRemaining())
        System.out.println(fb.position() + " -> " + fb.get());
    IntBuffer ib = ((ByteBuffer) bb.rewind()).asIntBuffer();
    System.out.println("Int Buffer");
    while (ib.hasRemaining())
        System.out.println(ib.position() + " -> " + ib.get());
    LongBuffer lb = ((ByteBuffer) bb.rewind()).asLongBuffer();
    System.out.println("Long Buffer");
    while (lb.hasRemaining())
        System.out.println(lb.position() + " -> " + lb.get());
    ShortBuffer sb = ((ByteBuffer) bb.rewind()).asShortBuffer();
    System.out.println("Short Buffer");
    while (sb.hasRemaining())
        System.out.println(sb.position() + " -> " + sb.get());
    DoubleBuffer db = ((ByteBuffer) bb.rewind()).asDoubleBuffer();
    System.out.println("Double Buffer");
    while (db.hasRemaining())
        System.out.println(db.position() + " -> " + db.get());
}

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From source file:Main.java

private static String formatShorts(byte[] data, boolean unsigned) {
    ShortBuffer bb = ByteBuffer.wrap(data).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer();

    StringBuilder sb = new StringBuilder(bb.capacity() * 3);

    while (bb.remaining() > 0) {
        if (unsigned) {
            sb.append(bb.get() & 0xffff);
        } else {/*ww  w  .ja v  a  2s  . c om*/
            sb.append(bb.get());
        }
        sb.append(',');
        sb.append('\n');
    }

    return sb.toString();
}

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From source file:io.github.dsheirer.record.wave.MonoWaveReader.java

/**
 * Opens the file//from  w w  w.  j a  v  a  2s  .c  o m
 */
private void open() throws IOException {
    if (!Files.exists(mPath)) {
        throw new IOException("File not found");
    }

    mInputStream = Files.newInputStream(mPath, StandardOpenOption.READ);

    //Check for RIFF header
    byte[] buffer = new byte[4];
    mInputStream.read(buffer);

    if (!Arrays.equals(buffer, WaveUtils.RIFF_CHUNK)) {
        throw new IOException("File is not .wav format - missing RIFF chunk");
    }

    //Get file size
    mInputStream.read(buffer);
    int fileSize = ByteBuffer.wrap(buffer).order(ByteOrder.LITTLE_ENDIAN).asIntBuffer().get();

    //Check for WAVE format
    mInputStream.read(buffer);

    if (!Arrays.equals(buffer, WaveUtils.WAV_FORMAT)) {
        throw new IOException("File is not .wav format - missing WAVE format");
    }

    //Check for format chunk
    mInputStream.read(buffer);

    if (!Arrays.equals(buffer, WaveUtils.CHUNK_FORMAT)) {
        throw new IOException("File is not .wav format - missing format chunk");
    }

    //Get chunk size
    mInputStream.read(buffer);
    int chunkSize = ByteBuffer.wrap(buffer).order(ByteOrder.LITTLE_ENDIAN).asIntBuffer().get();

    //Get format
    mInputStream.read(buffer);

    ShortBuffer shortBuffer = ByteBuffer.wrap(buffer).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer();
    short format = shortBuffer.get();
    if (format != WaveUtils.PCM_FORMAT) {
        throw new IOException("File format not supported - expecting PCM format");
    }

    //Get number of channels
    short channels = shortBuffer.get();
    if (channels != 1) {
        throw new IOException("Unsupported channel count - mono audio only");
    }

    //Get samples per second
    mInputStream.read(buffer);
    int sampleRate = ByteBuffer.wrap(buffer).order(ByteOrder.LITTLE_ENDIAN).asIntBuffer().get();

    //Get bytes per second
    mInputStream.read(buffer);
    int bytesPerSecond = ByteBuffer.wrap(buffer).order(ByteOrder.LITTLE_ENDIAN).asIntBuffer().get();

    mInputStream.read(buffer);

    //Get frame size
    shortBuffer = ByteBuffer.wrap(buffer).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer();
    short frameSize = shortBuffer.get();
    if (frameSize != 2) {
        throw new IOException("PCM frame size not supported - expecting 2 bytes per frame");
    }

    //Get bits per sample
    short bitsPerSample = shortBuffer.get();
    if (bitsPerSample != 16) {
        throw new IOException("PCM sample size not supported - expecting 16 bits per sample");
    }

    mInputStream.read(buffer);

    if (!Arrays.equals(buffer, WaveUtils.CHUNK_DATA)) {
        throw new IOException("Unexpected chunk - expecting data chunk");
    }

    //Get data chunk size
    mInputStream.read(buffer);
    mDataByteSize = ByteBuffer.wrap(buffer).order(ByteOrder.LITTLE_ENDIAN).asIntBuffer().get();
}

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From source file:org.nuras.mcpha.Client.java

/**
 * // w w w . j a v a  2  s  .  c  o  m
 * @param user
 * @param channels
 * @param trigger_mode
 * @param trigger_level
 * @param trigger_slope
 * @param trigger_source
 * @throws IOException 
 */
synchronized public static void acquireOscilloscopeData(Session user, int channels, String trigger_mode,
        int trigger_level, String trigger_slope, int trigger_source) throws IOException {
    mcphaResetOscilloscope();

    // Set number of samples to skip before trigger
    mcphaSetNumberOfSamplesBeforeTrigger(5000);

    // Set total number of samples to acquire for this run
    mcphaSetTotalNumberOfSamplesToAcquire(65536);

    // Start oscilloscope
    mcphaStartOscilloscope();

    // wait for 200 milliseconds
    try {
        Thread.sleep(200);
    } catch (InterruptedException ex) {
        Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex);
    }

    // Read oscilloscope status
    for (int i = 0; i < 5; i++) {
        try {
            Thread.sleep(100);
        } catch (InterruptedException ex) {
            Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex);
        }
        System.out.println("Oscilloscope status:" + mcphaReadOscilloscopeStatus());
    }

    // get oscillsocope data
    ShortBuffer data = mcphaGetOsilloscopeData();

    boolean channel_1_requested = (channels & 0x01) != 0;
    boolean channel_2_requested = (channels & 0x02) != 0;

    // push data
    JSONObject json = createJSONResponseObject();
    json.put("command", "get_oscilloscope_data");
    json.put("message", "");
    json.put("status", 0);

    JSONArray arr1 = new JSONArray();
    JSONArray arr2 = new JSONArray();
    data.rewind();
    for (int i = 0, n1 = 0, n2 = 0; i < data.capacity(); i += 2) {
        // channel 1 data
        JSONArray xy = new JSONArray();
        short d = data.get();
        if (channel_1_requested) {
            arr1.put(xy.put(n1++).put(d));
        }
        // channel 2 data
        xy = new JSONArray();
        d = data.get();
        if (channel_2_requested) {
            arr2.put(xy.put(n2++).put(d));
        }
    }
    json.put("data1", arr1);
    json.put("label1", channel_1_requested ? "Channel 1" : "");

    json.put("data2", arr2);
    json.put("label2", channel_2_requested ? "Channel 2" : "");

    sendJSONObjectMessage(user.getRemote(), json);

}

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From source file:c.depthchart.ViewerPanel.java

private void updateDepthImage()
/* build a new histogram of 8-bit depth values, and convert it to
   image pixels (as bytes) *///from w w  w .  j  a va 2s .  com
{
    ShortBuffer depthBuf = depthMD.getData().createShortBuffer();
    calcHistogram(depthBuf);
    depthBuf.rewind();

    while (depthBuf.remaining() > 0) {
        int pos = depthBuf.position();
        short depth = depthBuf.get();
        imgbytes[pos] = (byte) histogram[depth];
    }
}

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From source file:c.depthchart.ViewerPanel.java

private void calcHistogram(ShortBuffer depthBuf) {
    // reset histogram[]
    for (int i = 0; i <= maxDepth; i++)
        histogram[i] = 0;/*from   w  w  w . ja va  2 s .  c o  m*/

    // record number of different depths in histogram[]
    int numPoints = 0;
    maxDepth = 0;
    while (depthBuf.remaining() > 0) {
        short depthVal = depthBuf.get();
        if (depthVal > maxDepth)
            maxDepth = depthVal;
        if ((depthVal != 0) && (depthVal < MAX_DEPTH_SIZE)) { // skip histogram[0]
            histogram[depthVal]++;
            numPoints++;
        }
    }
    // System.out.println("No. of numPoints: " + numPoints);
    // System.out.println("Maximum depth: " + maxDepth);

    if (chartTime > CHART_DELAY) {
        updateChart(histogram, maxDepth);
        chartTime = 0;
    }

    // convert into a cummulative depth count (skipping histogram[0])
    for (int i = 1; i <= maxDepth; i++)
        histogram[i] += histogram[i - 1];

    /* convert cummulative depth into 8-bit range (0-255), which will later become grayscales
        - darker means further away, although black
          means "too close" for a depth value to be calculated).
    */
    if (numPoints > 0) {
        for (int i = 1; i <= maxDepth; i++) // skipping histogram[0]
            histogram[i] = (int) (256 * (1.0f - (histogram[i] / (float) numPoints)));
    }
}

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From source file:TrackerPanel.java

private void calcHistogram(ShortBuffer depthBuf) {
    // reset histogram
    for (int i = 0; i <= maxDepth; i++)
        histogram[i] = 0;//from w w  w.j a  v a 2s .co m

    // record number of different depths in histogram[]
    int numPoints = 0;
    maxDepth = 0;
    while (depthBuf.remaining() > 0) {
        short depthVal = depthBuf.get();
        if (depthVal > maxDepth)
            maxDepth = depthVal;
        if ((depthVal != 0) && (depthVal < MAX_DEPTH_SIZE)) { // skip
            // histogram[0]
            histogram[depthVal]++;
            numPoints++;
        }
    }
    // System.out.println("No. of numPoints: " + numPoints);
    // System.out.println("Maximum depth: " + maxDepth);

    // convert into a cummulative depth count (skipping histogram[0])
    for (int i = 1; i <= maxDepth; i++)
        histogram[i] += histogram[i - 1];

    /*
     * convert cummulative depth into the range 0.0 - 1.0f which will later
     * be used to modify a color from USER_COLORS[]
     */
    if (numPoints > 0) {
        for (int i = 1; i <= maxDepth; i++)
            // skipping histogram[0]
            histogram[i] = 1.0f - (histogram[i] / (float) numPoints);
    }
}

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From source file:TrackerPanel.java

private void updateUserDepths() {
    depthMD = depthGen.getMetaData();//from   ww w.  ja  v a  2s  . co  m
    ShortBuffer depthBuf = depthMD.getData().createShortBuffer();
    calcHistogram(depthBuf);
    depthBuf.rewind();

    ShortBuffer usersBuf = sceneMD.getData().createShortBuffer();

    while (depthBuf.remaining() > 0) {
        int pos = depthBuf.position();
        short depthVal = depthBuf.get();
        short userID = usersBuf.get();

        imgbytes[3 * pos] = 0; // default colour is black when there's no
        // depth data
        imgbytes[3 * pos + 1] = 0;
        imgbytes[3 * pos + 2] = 0;

        if (depthVal != 0) { // there is depth data
            // convert userID to index into USER_COLORS[]
            int colorIdx = userID % (USER_COLORS.length - 1); // skip last
            // color

            if (userID == 0) // not a user; actually the background
                colorIdx = USER_COLORS.length - 1;
            // use last index: the position of white in USER_COLORS[]

            // convert histogram value (0.0-1.0f) to a RGB color
            float histValue = histogram[depthVal];
            imgbytes[3 * pos] = (byte) (histValue * USER_COLORS[colorIdx].getRed());
            imgbytes[3 * pos + 1] = (byte) (histValue * USER_COLORS[colorIdx].getGreen());
            imgbytes[3 * pos + 2] = (byte) (histValue * USER_COLORS[colorIdx].getBlue());
        }
    }
}

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