java.nio.ByteBuffer.asFloatBuffer()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中java.nio.ByteBuffer.asFloatBuffer()方法的一些代码示例，展示了ByteBuffer.asFloatBuffer()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ByteBuffer.asFloatBuffer()方法的具体详情如下：
包路径：java.nio.ByteBuffer
类名称：ByteBuffer
方法名：asFloatBuffer

ByteBuffer.asFloatBuffer介绍

[英]Returns a float buffer which is based on the remaining content of this byte buffer.

The new buffer's position is zero, its limit and capacity is the number of remaining bytes divided by four, and its mark is not set. The new buffer's read-only property and byte order are the same as this buffer's. The new buffer is direct if this byte buffer is direct.

The new buffer shares its content with this buffer, which means either buffer's change of content will be visible to the other. The two buffer's position, limit and mark are independent.
[中]

代码示例

代码示例来源：origin: libgdx/libgdx

public static FloatBuffer newFloatBuffer (int numFloats) {
  ByteBuffer buffer = ByteBuffer.allocateDirect(numFloats * 4);
  buffer.order(ByteOrder.nativeOrder());
  return buffer.asFloatBuffer();
}

代码示例来源：origin: apache/incubator-druid

public EntireLayoutColumnarFloatsSupplier(int totalSize, ByteBuffer fromBuffer, ByteOrder order)
{
 this.totalSize = totalSize;
 this.buffer = fromBuffer.asReadOnlyBuffer().order(order).asFloatBuffer();
}

代码示例来源：origin: apache/incubator-druid

private static byte[] floatArrayToByteArray(float[] input)
{
 final ByteBuffer buffer = ByteBuffer.allocate(Float.BYTES * input.length);
 buffer.asFloatBuffer().put(input);
 return buffer.array();
}

代码示例来源：origin: google/ExoPlayer

/** Allocates a FloatBuffer with the given data. */
public static FloatBuffer createBuffer(float[] data) {
 ByteBuffer bb = ByteBuffer.allocateDirect(data.length * C.BYTES_PER_FLOAT);
 bb.order(ByteOrder.nativeOrder());
 FloatBuffer buffer = bb.asFloatBuffer();
 buffer.put(data);
 buffer.position(0);
 return buffer;
}

代码示例来源：origin: opensourceBIM/BIMserver

public static byte[] floatToByteArray(Float inFloat) {
  byte[] bArray = new byte[4];
  ByteBuffer bBuffer = ByteBuffer.wrap(bArray);
  bBuffer.order(ByteOrder.LITTLE_ENDIAN);
  FloatBuffer lBuffer = bBuffer.asFloatBuffer();
  lBuffer.put(inFloat);
  return bArray;
}

代码示例来源：origin: google/ExoPlayer

private static FloatBuffer nativeFloatBuffer(float... array) {
 FloatBuffer buffer = ByteBuffer.allocateDirect(array.length * 4).order(
   ByteOrder.nativeOrder()).asFloatBuffer();
 buffer.put(array);
 buffer.flip();
 return buffer;
}

代码示例来源：origin: libgdx/libgdx

public static FloatBuffer newFloatBuffer (int numFloats) {
  ByteBuffer buffer = ByteBuffer.allocateDirect(numFloats * 4);
  buffer.order(ByteOrder.nativeOrder());
  return buffer.asFloatBuffer();
}

代码示例来源：origin: deeplearning4j/nd4j

switch (_dtype) {
  case DOUBLE: {
    val db = bb.order(_order).asDoubleBuffer();
    for (int e = 0; e < prod; e++)
      doubles[e] = db.get(e);
    val fb = bb.order(_order).asFloatBuffer();
    for (int e = 0; e < prod; e++)
      doubles[e] = (double) fb.get(e);
    val sb = bb.order(_order).asShortBuffer();
    for (int e = 0; e < prod; e++)
      doubles[e] = (double) HalfIndexer.toFloat((int) sb.get(e));

代码示例来源：origin: opensourceBIM/BIMserver

public static byte[] floatArrayToByteArray(float[] vertices) {
  if (vertices == null) {
    return null;
  }
  ByteBuffer buffer = ByteBuffer.wrap(new byte[vertices.length * 4]);
  buffer.order(ByteOrder.LITTLE_ENDIAN);
  FloatBuffer asFloatBuffer = buffer.asFloatBuffer();
  for (float f : vertices) {
    asFloatBuffer.put(f);
  }
  return buffer.array();
}

代码示例来源：origin: apache/incubator-druid

@Override
public byte[] getCacheKey()
{
 byte[] fieldNameBytes = StringUtils.toUtf8(fieldName);
 ByteBuffer buf = ByteBuffer
   .allocate(1 + fieldNameBytes.length + Float.BYTES * breaks.length)
   .put(AggregatorUtil.HIST_CACHE_TYPE_ID)
   .put(fieldNameBytes)
   .put((byte) 0xFF);
 buf.asFloatBuffer().put(breaks);
 return buf.array();
}

代码示例来源：origin: cats-oss/android-gpuimage

public GPUImageRenderer(final GPUImageFilter filter) {
  this.filter = filter;
  runOnDraw = new LinkedList<>();
  runOnDrawEnd = new LinkedList<>();
  glCubeBuffer = ByteBuffer.allocateDirect(CUBE.length * 4)
      .order(ByteOrder.nativeOrder())
      .asFloatBuffer();
  glCubeBuffer.put(CUBE).position(0);
  glTextureBuffer = ByteBuffer.allocateDirect(TEXTURE_NO_ROTATION.length * 4)
      .order(ByteOrder.nativeOrder())
      .asFloatBuffer();
  setRotation(Rotation.NORMAL, false, false);
}

代码示例来源：origin: runelite/runelite

static FloatBuffer allocateDirect(int size)
  {
    return ByteBuffer.allocateDirect(size * Float.BYTES)
      .order(ByteOrder.nativeOrder())
      .asFloatBuffer();
  }
}

代码示例来源：origin: opensourceBIM/BIMserver

public static float[] toFloatArray(byte[] data) {
  ByteBuffer buffer = ByteBuffer.wrap(data);
  buffer.order(ByteOrder.LITTLE_ENDIAN);
  FloatBuffer floatBuffer = buffer.asFloatBuffer();
  float[] result = new float[data.length / 4];
  for (int i=0; i<data.length / 4; i++) {
    result[i] = floatBuffer.get();
  }
  return result;
}

代码示例来源：origin: apache/incubator-druid

@Override
 public byte[] getCacheKey()
 {
  ByteBuffer minCoordsBuffer = ByteBuffer.allocate(minCoords.length * Float.BYTES);
  minCoordsBuffer.asFloatBuffer().put(minCoords);
  final byte[] minCoordsCacheKey = minCoordsBuffer.array();

  ByteBuffer maxCoordsBuffer = ByteBuffer.allocate(maxCoords.length * Float.BYTES);
  maxCoordsBuffer.asFloatBuffer().put(maxCoords);
  final byte[] maxCoordsCacheKey = maxCoordsBuffer.array();

  final ByteBuffer cacheKey = ByteBuffer
    .allocate(1 + minCoordsCacheKey.length + maxCoordsCacheKey.length + Integer.BYTES)
    .put(minCoordsCacheKey)
    .put(maxCoordsCacheKey)
    .putInt(limit)
    .put(CACHE_TYPE_ID);
  return cacheKey.array();
 }
}

代码示例来源：origin: Rajawali/Rajawali

private FloatBuffer alocateBuffer(FloatBuffer buffer, float[] data) {
  if (buffer == null) {
    buffer = ByteBuffer
        .allocateDirect(data.length * Geometry3D.FLOAT_SIZE_BYTES * 4)
        .order(ByteOrder.nativeOrder()).asFloatBuffer();
    buffer.put(data);
    buffer.position(0);
  } else {
    buffer.put(data);
  }
  return buffer;
}

代码示例来源：origin: robovm/robovm

@MarshalsArray
public static FloatBuffer toFloatBuffer(Class<?> cls, long handle, long flags, int d1) {
  return VM.newDirectByteBuffer(handle, d1 << 2).order(ByteOrder.nativeOrder()).asFloatBuffer();
}
@MarshalsArray

代码示例来源：origin: opensourceBIM/BIMserver

private boolean matchExactlyTheSame(GeometryData geometryDate, GeometryData d) {
    ByteBuffer bb1 = ByteBuffer.wrap(geometryDate.getVertices().getData());
    bb1.order(ByteOrder.LITTLE_ENDIAN);
    FloatBuffer buffer1 = bb1.asFloatBuffer();
    ByteBuffer bb2 = ByteBuffer.wrap(d.getVertices().getData());
    bb2.order(ByteOrder.LITTLE_ENDIAN);
    FloatBuffer buffer2 = bb2.asFloatBuffer();
    if (buffer1.capacity() != buffer2.capacity()) {
      return false;
    }
    for (int i=0; i<buffer1.capacity(); i++) {
      float a = buffer1.get();
      float b = buffer1.get();
      if (b != a) {
        return false;
      }
    }
    return true;
  }
}

代码示例来源：origin: apache/incubator-druid

@Override
 public byte[] getCacheKey()
 {
  final ByteBuffer minCoordsBuffer = ByteBuffer.allocate(coords.length * Float.BYTES);
  minCoordsBuffer.asFloatBuffer().put(coords);
  final byte[] minCoordsCacheKey = minCoordsBuffer.array();
  final ByteBuffer cacheKey = ByteBuffer
    .allocate(1 + minCoordsCacheKey.length + Integer.BYTES + Float.BYTES)
    .put(minCoordsCacheKey)
    .putFloat(radius)
    .putInt(getLimit())
    .put(CACHE_TYPE_ID);
  return cacheKey.array();
 }
}

代码示例来源：origin: Rajawali/Rajawali

public void setColors(float[] colors, boolean override) {
  final BufferInfo colorInfo = mBuffers.get(COLOR_BUFFER_KEY);
  if (colorInfo.buffer == null || override == true) {
    colorInfo.buffer = ByteBuffer
        .allocateDirect(colors.length * FLOAT_SIZE_BYTES)
        .order(ByteOrder.nativeOrder()).asFloatBuffer();
    ((FloatBuffer) colorInfo.buffer).put(colors);
    colorInfo.buffer.position(0);
  } else {
    ((FloatBuffer) colorInfo.buffer).put(colors);
    colorInfo.buffer.position(0);
  }
}

代码示例来源：origin: robovm/robovm

/**
 * Returns a {@link FloatBuffer} which reads and writes to the same memory
 * location pointed to by this {@link FloatPtr}.
 * 
 * @param n the maximum number of floats the {@link FloatBuffer} can 
 *        read/write. This will be the {@link FloatBuffer}'s 
 *        <code>capacity</code>.
 * @return the {@link FloatBuffer}.
 */
public FloatBuffer asFloatBuffer(int n) {
  return as(BytePtr.class).asByteBuffer(n << 2).order(ByteOrder.nativeOrder()).asFloatBuffer();
}

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