!7

lib 1000278 // jcodec library

import static org.jcodec.common.NIOUtils.writableFileChannel;

import java.io.File;

import java.nio.ByteBuffer;

import java.util.Arrays;

import org.jcodec.codecs.raw.V210Encoder;

import org.jcodec.common.model.ColorSpace;

import org.jcodec.common.model.Picture;

import org.jcodec.common.model.Size;

import org.jcodec.containers.mp4.muxer.FramesMP4MuxerTrack;

import org.jcodec.containers.mp4.muxer.MP4Muxer;

import org.jcodec.containers.mp4.MP4Packet;

/**

 * This class is part of JCodec ( www.jcodec.org ) This software is distributed

 * under FreeBSD License

 *

 * This code generates two dark gradients 8bit and 10 bit quantization and saves

 * it into v210 mov

 *

 * @author Jay Codec

 *

 */

static void main(S[] args) tex {

  if (args.length == 0)

    args = new String[] {prepareProgramFile("out.mov").getPath(), "200"};

  if (args.length < 2) {

    System.out.println("<out mov> <n frames>");

    return;

  }

  System.out.println("Writing movie: " + args[0]);

  int width = 640;

  int height = 480;

  Picture pic = Picture.create(width, height, ColorSpace.YUV422_10);

  for (int p = 0; p < 3; p++)

  Arrays.fill(pic.getPlaneData(p), 0);

  V210Encoder encoder = new V210Encoder();

  MP4Muxer muxer = new MP4Muxer(writableFileChannel(new File(args[0])));

  ByteBuffer out = ByteBuffer.allocate(width * height * 10);

  ByteBuffer frame = encoder.encodeFrame(out, pic);

  FramesMP4MuxerTrack videoTrack = muxer.addVideoTrack("v210", new Size(width, height), "jcodec", 24000);

  int frames = 24;

  for (int i = 0; i < frames; i++) {

    videoTrack.addFrame(new MP4Packet(frame, i * 1001, 24000, 1001, i, true, null, i * 1001, 0));

  }

  muxer.writeHeader();

  System.out.println("Done writing movie.");

}

private static void drawGrad(int[] y, Size ySize) {

  int blockX = ySize.getWidth() / 10;

  int blockY = ySize.getHeight() / 7;

  fillGrad(y, ySize.getWidth(), blockX, blockY, 9 * blockX, 3 * blockY, 0.2, 0.1, 8);

  fillGrad(y, ySize.getWidth(), blockX, 4 * blockY, 9 * blockX, 6 * blockY, 0.2, 0.1, 10);

}

private static void fillGrad(int[] y, int stride, int left, int top, int right, int bottom, double from, double to,

                             int quant) {

  int step = stride + left - right;

  int off = top * stride + left;

  for (int j = top; j < bottom; j++) {

    for (int i = left; i < right; i++) {

      y[off++] = colr(((double) i - left) / (right - left), ((double) j - top) / (bottom - top), from, to,

        quant);

    }

    off += step;

  }

}

private static int colr(double i, double j, double from, double to, int quant) {

  int val = ((int) ((1 << quant) * (from + (to - from) * i))) << (10 - quant);

  return val;

}