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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.media.effect;
import android.filterfw.core.Filter;
import android.filterfw.core.FilterGraph;
import android.filterfw.core.GraphRunner;
import android.filterfw.core.SyncRunner;
import android.media.effect.FilterEffect;
import android.media.effect.EffectContext;
import android.filterfw.io.GraphIOException;
import android.filterfw.io.GraphReader;
import android.filterfw.io.TextGraphReader;
/**
* Effect subclass for effects based on a single Filter. Subclasses need only invoke the
* constructor with the correct arguments to obtain an Effect implementation.
*
* @hide
*/
public class FilterGraphEffect extends FilterEffect {
private static final String TAG = "FilterGraphEffect";
protected String mInputName;
protected String mOutputName;
protected GraphRunner mRunner;
protected FilterGraph mGraph;
protected Class mSchedulerClass;
/**
* Constructs a new FilterGraphEffect.
*
* @param name The name of this effect (used to create it in the EffectFactory).
* @param graphString The graph string to create the graph.
* @param inputName The name of the input GLTextureSource filter.
* @param outputName The name of the output GLTextureSource filter.
*/
public FilterGraphEffect(EffectContext context,
String name,
String graphString,
String inputName,
String outputName,
Class scheduler) {
super(context, name);
mInputName = inputName;
mOutputName = outputName;
mSchedulerClass = scheduler;
createGraph(graphString);
}
private void createGraph(String graphString) {
GraphReader reader = new TextGraphReader();
try {
mGraph = reader.readGraphString(graphString);
} catch (GraphIOException e) {
throw new RuntimeException("Could not setup effect", e);
}
if (mGraph == null) {
throw new RuntimeException("Could not setup effect");
}
mRunner = new SyncRunner(getFilterContext(), mGraph, mSchedulerClass);
}
@Override
public void apply(int inputTexId, int width, int height, int outputTexId) {
beginGLEffect();
Filter src = mGraph.getFilter(mInputName);
if (src != null) {
src.setInputValue("texId", inputTexId);
src.setInputValue("width", width);
src.setInputValue("height", height);
} else {
throw new RuntimeException("Internal error applying effect");
}
Filter dest = mGraph.getFilter(mOutputName);
if (dest != null) {
dest.setInputValue("texId", outputTexId);
} else {
throw new RuntimeException("Internal error applying effect");
}
try {
mRunner.run();
} catch (RuntimeException e) {
throw new RuntimeException("Internal error applying effect: ", e);
}
endGLEffect();
}
@Override
public void setParameter(String parameterKey, Object value) {
}
@Override
public void release() {
mGraph.tearDown(getFilterContext());
mGraph = null;
}
}
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