blob: 96d7d4380e77f27d13471c0bc5dbd3de0feda184 [file] [log] [blame]
/*
* 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 android.graphics.Matrix;
import javax.annotation.Nullable;
import android.os.Handler;
/**
* Android texture buffer that glues together the necessary information together with a generic
* release callback. ToI420() is implemented by providing a Handler and a YuvConverter.
*/
public class TextureBufferImpl implements VideoFrame.TextureBuffer {
private final int width;
private final int height;
private final Type type;
private final int id;
private final Matrix transformMatrix;
private final Handler toI420Handler;
private final YuvConverter yuvConverter;
private final RefCountDelegate refCountDelegate;
public TextureBufferImpl(int width, int height, Type type, int id, Matrix transformMatrix,
Handler toI420Handler, YuvConverter yuvConverter, @Nullable Runnable releaseCallback) {
this.width = width;
this.height = height;
this.type = type;
this.id = id;
this.transformMatrix = transformMatrix;
this.toI420Handler = toI420Handler;
this.yuvConverter = yuvConverter;
this.refCountDelegate = new RefCountDelegate(releaseCallback);
}
@Override
public VideoFrame.TextureBuffer.Type getType() {
return type;
}
@Override
public int getTextureId() {
return id;
}
@Override
public Matrix getTransformMatrix() {
return transformMatrix;
}
@Override
public int getWidth() {
return width;
}
@Override
public int getHeight() {
return height;
}
@Override
public VideoFrame.I420Buffer toI420() {
return ThreadUtils.invokeAtFrontUninterruptibly(
toI420Handler, () -> yuvConverter.convert(this));
}
@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) {
final Matrix cropAndScaleMatrix = new Matrix();
// In WebRTC, Y=0 is the top row, while in OpenGL Y=0 is the bottom row. This means that the Y
// direction is effectively reversed.
final int cropYFromBottom = height - (cropY + cropHeight);
cropAndScaleMatrix.preTranslate(cropX / (float) width, cropYFromBottom / (float) height);
cropAndScaleMatrix.preScale(cropWidth / (float) width, cropHeight / (float) height);
return applyTransformMatrix(cropAndScaleMatrix, scaleWidth, scaleHeight);
}
/**
* Create a new TextureBufferImpl with an applied transform matrix and a new size. The
* existing buffer is unchanged. The given transform matrix is applied first when texture
* coordinates are still in the unmodified [0, 1] range.
*/
public TextureBufferImpl applyTransformMatrix(
Matrix transformMatrix, int newWidth, int newHeight) {
final Matrix newMatrix = new Matrix(this.transformMatrix);
newMatrix.preConcat(transformMatrix);
retain();
return new TextureBufferImpl(
newWidth, newHeight, type, id, newMatrix, toI420Handler, yuvConverter, this ::release);
}
}