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/*
* Copyright 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
package org.webrtc;
import androidx.annotation.Nullable;
import java.nio.ByteBuffer;
public class NV21Buffer implements VideoFrame.Buffer {
private final byte[] data;
private final int width;
private final int height;
private final RefCountDelegate refCountDelegate;
public NV21Buffer(byte[] data, int width, int height, @Nullable Runnable releaseCallback) {
this.data = data;
this.width = width;
this.height = height;
this.refCountDelegate = new RefCountDelegate(releaseCallback);
}
@Override
public int getWidth() {
return width;
}
@Override
public int getHeight() {
return height;
}
@Override
public VideoFrame.I420Buffer toI420() {
// Cropping converts the frame to I420. Just crop and scale to the whole image.
return (VideoFrame.I420Buffer) cropAndScale(0 /* cropX */, 0 /* cropY */, width /* cropWidth */,
height /* cropHeight */, width /* scaleWidth */, height /* scaleHeight */);
}
@Override
public void retain() {
refCountDelegate.retain();
}
@Override
public void release() {
refCountDelegate.release();
}
@Override
public VideoFrame.Buffer cropAndScale(
int cropX, int cropY, int cropWidth, int cropHeight, int scaleWidth, int scaleHeight) {
JavaI420Buffer newBuffer = JavaI420Buffer.allocate(scaleWidth, scaleHeight);
nativeCropAndScale(cropX, cropY, cropWidth, cropHeight, scaleWidth, scaleHeight, data, width,
height, newBuffer.getDataY(), newBuffer.getStrideY(), newBuffer.getDataU(),
newBuffer.getStrideU(), newBuffer.getDataV(), newBuffer.getStrideV());
return newBuffer;
}
private static native void nativeCropAndScale(int cropX, int cropY, int cropWidth, int cropHeight,
int scaleWidth, int scaleHeight, byte[] src, int srcWidth, int srcHeight, ByteBuffer dstY,
int dstStrideY, ByteBuffer dstU, int dstStrideU, ByteBuffer dstV, int dstStrideV);
}