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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;
import java.util.Arrays;
/**
* 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. */
public static class I420Frame {
public final int width;
public final int height;
public final int[] yuvStrides;
public final ByteBuffer[] yuvPlanes;
/**
* Construct a frame of the given dimensions with the specified planar
* data. If |yuvPlanes| is null, new planes of the appropriate sizes are
* allocated.
*/
public I420Frame(
int width, int height, int[] yuvStrides, ByteBuffer[] yuvPlanes) {
this.width = width;
this.height = height;
this.yuvStrides = yuvStrides;
if (yuvPlanes == null) {
yuvPlanes = new ByteBuffer[3];
yuvPlanes[0] = ByteBuffer.allocateDirect(yuvStrides[0] * height);
yuvPlanes[1] = ByteBuffer.allocateDirect(yuvStrides[1] * height);
yuvPlanes[2] = ByteBuffer.allocateDirect(yuvStrides[2] * height);
}
this.yuvPlanes = yuvPlanes;
}
/**
* Copy the planes out of |source| into |this| and return |this|. Calling
* this with mismatched frame dimensions is a programming error and will
* likely crash.
*/
public I420Frame copyFrom(I420Frame source) {
if (!Arrays.equals(yuvStrides, source.yuvStrides) ||
width != source.width || height != source.height) {
throw new RuntimeException("Mismatched dimensions! Source: " +
source.toString() + ", destination: " + toString());
}
copyPlane(source.yuvPlanes[0], yuvPlanes[0]);
copyPlane(source.yuvPlanes[1], yuvPlanes[1]);
copyPlane(source.yuvPlanes[2], yuvPlanes[2]);
return this;
}
@Override
public String toString() {
return width + "x" + height + ":" + yuvStrides[0] + ":" + yuvStrides[1] +
":" + yuvStrides[2];
}
// Copy the bytes out of |src| and into |dst|, ignoring and overwriting
// positon & limit in both buffers.
private void copyPlane(ByteBuffer src, ByteBuffer dst) {
src.position(0).limit(src.capacity());
dst.put(src);
dst.position(0).limit(dst.capacity());
}
}
/** The real meat of VideoRendererInterface. */
public static interface Callbacks {
public void setSize(int width, int height);
public void renderFrame(I420Frame frame);
}
// |this| either wraps a native (GUI) renderer or a client-supplied Callbacks
// (Java) implementation; so exactly one of these will be non-0/null.
final long nativeVideoRenderer;
private final Callbacks callbacks;
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);
this.callbacks = callbacks;
}
private VideoRenderer(long nativeVideoRenderer) {
this.nativeVideoRenderer = nativeVideoRenderer;
callbacks = null;
}
public void dispose() {
free(nativeVideoRenderer);
}
private static native long nativeCreateGuiVideoRenderer(int x, int y);
private static native long nativeWrapVideoRenderer(Callbacks callbacks);
private static native void free(long nativeVideoRenderer);
}
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