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/*
* libjingle
* Copyright 2013 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.webrtc;
import java.nio.ByteBuffer;
/**
* Java version of VideoRendererInterface. In addition to allowing clients to
* define their own rendering behavior (by passing in a Callbacks object), this
* class also provides a createGui() method for creating a GUI-rendering window
* on various platforms.
*/
public class VideoRenderer {
/**
* Java version of cricket::VideoFrame. Frames are only constructed from native code and test
* code.
*/
public static class I420Frame {
public final int width;
public final int height;
public final int[] yuvStrides;
public ByteBuffer[] yuvPlanes;
public final boolean yuvFrame;
public Object textureObject;
public int textureId;
// Frame pointer in C++.
private long nativeFramePointer;
// rotationDegree is the degree that the frame must be rotated clockwisely
// to be rendered correctly.
public int rotationDegree;
/**
* Construct a frame of the given dimensions with the specified planar data.
*/
I420Frame(int width, int height, int rotationDegree, int[] yuvStrides, ByteBuffer[] yuvPlanes,
long nativeFramePointer) {
this.width = width;
this.height = height;
this.yuvStrides = yuvStrides;
this.yuvPlanes = yuvPlanes;
this.yuvFrame = true;
this.rotationDegree = rotationDegree;
this.nativeFramePointer = nativeFramePointer;
if (rotationDegree % 90 != 0) {
throw new IllegalArgumentException("Rotation degree not multiple of 90: " + rotationDegree);
}
}
/**
* Construct a texture frame of the given dimensions with data in SurfaceTexture
*/
I420Frame(
int width, int height, int rotationDegree,
Object textureObject, int textureId, long nativeFramePointer) {
this.width = width;
this.height = height;
this.yuvStrides = null;
this.yuvPlanes = null;
this.textureObject = textureObject;
this.textureId = textureId;
this.yuvFrame = false;
this.rotationDegree = rotationDegree;
this.nativeFramePointer = nativeFramePointer;
if (rotationDegree % 90 != 0) {
throw new IllegalArgumentException("Rotation degree not multiple of 90: " + rotationDegree);
}
}
public int rotatedWidth() {
return (rotationDegree % 180 == 0) ? width : height;
}
public int rotatedHeight() {
return (rotationDegree % 180 == 0) ? height : width;
}
@Override
public String toString() {
return width + "x" + height + ":" + yuvStrides[0] + ":" + yuvStrides[1] +
":" + yuvStrides[2];
}
}
// Helper native function to do a video frame plane copying.
public static native void nativeCopyPlane(ByteBuffer src, int width,
int height, int srcStride, ByteBuffer dst, int dstStride);
/** The real meat of VideoRendererInterface. */
public static interface Callbacks {
// |frame| might have pending rotation and implementation of Callbacks
// should handle that by applying rotation during rendering. The callee
// is responsible for signaling when it is done with |frame| by calling
// renderFrameDone(frame).
public void renderFrame(I420Frame frame);
}
/**
* This must be called after every renderFrame() to release the frame.
*/
public static void renderFrameDone(I420Frame frame) {
frame.yuvPlanes = null;
frame.textureObject = null;
frame.textureId = 0;
if (frame.nativeFramePointer != 0) {
releaseNativeFrame(frame.nativeFramePointer);
frame.nativeFramePointer = 0;
}
}
// |this| either wraps a native (GUI) renderer or a client-supplied Callbacks
// (Java) implementation; this is indicated by |isWrappedVideoRenderer|.
long nativeVideoRenderer;
private final boolean isWrappedVideoRenderer;
public static VideoRenderer createGui(int x, int y) {
long nativeVideoRenderer = nativeCreateGuiVideoRenderer(x, y);
if (nativeVideoRenderer == 0) {
return null;
}
return new VideoRenderer(nativeVideoRenderer);
}
public VideoRenderer(Callbacks callbacks) {
nativeVideoRenderer = nativeWrapVideoRenderer(callbacks);
isWrappedVideoRenderer = true;
}
private VideoRenderer(long nativeVideoRenderer) {
this.nativeVideoRenderer = nativeVideoRenderer;
isWrappedVideoRenderer = false;
}
public void dispose() {
if (nativeVideoRenderer == 0) {
// Already disposed.
return;
}
if (!isWrappedVideoRenderer) {
freeGuiVideoRenderer(nativeVideoRenderer);
} else {
freeWrappedVideoRenderer(nativeVideoRenderer);
}
nativeVideoRenderer = 0;
}
private static native long nativeCreateGuiVideoRenderer(int x, int y);
private static native long nativeWrapVideoRenderer(Callbacks callbacks);
private static native void freeGuiVideoRenderer(long nativeVideoRenderer);
private static native void freeWrappedVideoRenderer(long nativeVideoRenderer);
private static native void releaseNativeFrame(long nativeFramePointer);
}
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