Example usage for android.graphics ImageFormat YUV_420_888

Introduction

In this page you can find the example usage for android.graphics ImageFormat YUV_420_888.

Prototype

int YUV_420_888

To view the source code for android.graphics ImageFormat YUV_420_888.

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Document

Multi-plane Android YUV 420 format

This format is a generic YCbCr format, capable of describing any 4:2:0 chroma-subsampled planar or semiplanar buffer (but not fully interleaved), with 8 bits per color sample.

Images in this format are always represented by three separate buffers of data, one for each color plane.

Usage

From source file:com.android.camera.one.v2.OneCameraZslImpl.java

/**
 * Given an image reader, extracts the JPEG image bytes and then closes the
 * reader.//from  www . j  a  va  2 s  . c  o  m
 *
 * @param img the image from which to extract jpeg bytes or compress to
 *            jpeg.
 * @param degrees the angle to rotate the image clockwise, in degrees. Rotation is
 *            only applied to YUV images.
 * @return The bytes of the JPEG image. Newly allocated.
 */
private byte[] acquireJpegBytes(Image img, int degrees) {
    ByteBuffer buffer;

    if (img.getFormat() == ImageFormat.JPEG) {
        Image.Plane plane0 = img.getPlanes()[0];
        buffer = plane0.getBuffer();

        byte[] imageBytes = new byte[buffer.remaining()];
        buffer.get(imageBytes);
        buffer.rewind();
        return imageBytes;
    } else if (img.getFormat() == ImageFormat.YUV_420_888) {
        buffer = mJpegByteBufferPool.acquire();
        if (buffer == null) {
            buffer = ByteBuffer.allocateDirect(img.getWidth() * img.getHeight() * 3);
        }

        int numBytes = JpegUtilNative.compressJpegFromYUV420Image(new AndroidImageProxy(img), buffer,
                JPEG_QUALITY, degrees);

        if (numBytes < 0) {
            throw new RuntimeException("Error compressing jpeg.");
        }

        buffer.limit(numBytes);

        byte[] imageBytes = new byte[buffer.remaining()];
        buffer.get(imageBytes);

        buffer.clear();
        mJpegByteBufferPool.release(buffer);

        return imageBytes;
    } else {
        throw new RuntimeException("Unsupported image format.");
    }
}

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