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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.filterpacks.base;
import android.filterfw.core.Filter;
import android.filterfw.core.FilterContext;
import android.filterfw.core.Frame;
import android.filterfw.core.FrameFormat;
import android.filterfw.core.GenerateFieldPort;
import android.filterfw.core.GLFrame;
import android.filterfw.format.ImageFormat;
/**
* @hide
*/
public class GLTextureSource extends Filter {
@GenerateFieldPort(name = "texId")
private int mTexId;
@GenerateFieldPort(name = "width")
private int mWidth;
@GenerateFieldPort(name = "height")
private int mHeight;
@GenerateFieldPort(name = "repeatFrame", hasDefault = true)
private boolean mRepeatFrame = false;
/* This timestamp will be used for all output frames from this source. They
* represent nanoseconds, and should be positive and monotonically
* increasing. Set to Frame.TIMESTAMP_UNKNOWN if timestamps are not
* meaningful for these textures.
*/
@GenerateFieldPort(name = "timestamp", hasDefault = true)
private long mTimestamp = Frame.TIMESTAMP_UNKNOWN;
private Frame mFrame;
public GLTextureSource(String name) {
super(name);
}
@Override
public void setupPorts() {
addOutputPort("frame", ImageFormat.create(ImageFormat.COLORSPACE_RGBA,
FrameFormat.TARGET_GPU));
}
@Override
public void fieldPortValueUpdated(String name, FilterContext context) {
// Release frame, so that it is recreated during the next process call
if (mFrame != null) {
mFrame.release();
mFrame = null;
}
}
@Override
public void process(FilterContext context) {
// Generate frame if not generated already
if (mFrame == null) {
FrameFormat outputFormat = ImageFormat.create(mWidth, mHeight,
ImageFormat.COLORSPACE_RGBA,
FrameFormat.TARGET_GPU);
mFrame = context.getFrameManager().newBoundFrame(outputFormat,
GLFrame.EXISTING_TEXTURE_BINDING,
mTexId);
mFrame.setTimestamp(mTimestamp);
}
// Push output
pushOutput("frame", mFrame);
if (!mRepeatFrame) {
// Close output port as we are done here
closeOutputPort("frame");
}
}
@Override
public void tearDown(FilterContext context) {
if (mFrame != null) {
mFrame.release();
}
}
}
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