sdk/sources/android-23/android/media/effect/effects/BackDropperEffect.java

   1 /*
   2  * Copyright (C) 2011 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package android.media.effect.effects;
  18
  19 import android.filterfw.core.Filter;
  20 import android.filterfw.core.OneShotScheduler;
  21 import android.media.effect.EffectContext;
  22 import android.media.effect.FilterGraphEffect;
  23 import android.media.effect.EffectUpdateListener;
  24
  25 import android.filterpacks.videoproc.BackDropperFilter;
  26 import android.filterpacks.videoproc.BackDropperFilter.LearningDoneListener;
  27
  28 /**
  29  * Background replacement Effect.
  30  *
  31  * Replaces the background of the input video stream with a selected video
  32  * Learns the background when it first starts up;
  33  * needs unobstructed view of background when this happens.
  34  *
  35  * Effect parameters:
  36  *   source: A URI for the background video
  37  * Listener: Called when learning period is complete
  38  *
  39  * @hide
  40  */
  41 public class BackDropperEffect extends FilterGraphEffect {
  42     private static final String mGraphDefinition =
  43             "@import android.filterpacks.base;\n" +
  44             "@import android.filterpacks.videoproc;\n" +
  45             "@import android.filterpacks.videosrc;\n" +
  46             "\n" +
  47             "@filter GLTextureSource foreground {\n" +
  48             "  texId = 0;\n" + // Will be set by base class
  49             "  width = 0;\n" +
  50             "  height = 0;\n" +
  51             "  repeatFrame = true;\n" +
  52             "}\n" +
  53             "\n" +
  54             "@filter MediaSource background {\n" +
  55             "  sourceUrl = \"no_file_specified\";\n" +
  56             "  waitForNewFrame = false;\n" +
  57             "  sourceIsUrl = true;\n" +
  58             "}\n" +
  59             "\n" +
  60             "@filter BackDropperFilter replacer {\n" +
  61             "  autowbToggle = 1;\n" +
  62             "}\n" +
  63             "\n" +
  64             "@filter GLTextureTarget output {\n" +
  65             "  texId = 0;\n" +
  66             "}\n" +
  67             "\n" +
  68             "@connect foreground[frame]  => replacer[video];\n" +
  69             "@connect background[video]  => replacer[background];\n" +
  70             "@connect replacer[video]    => output[frame];\n";
  71
  72     private EffectUpdateListener mEffectListener = null;
  73
  74     private LearningDoneListener mLearningListener = new LearningDoneListener() {
  75         public void onLearningDone(BackDropperFilter filter) {
  76             if (mEffectListener != null) {
  77                 mEffectListener.onEffectUpdated(BackDropperEffect.this, null);
  78             }
  79         }
  80     };
  81
  82     public BackDropperEffect(EffectContext context, String name) {
  83         super(context, name, mGraphDefinition, "foreground", "output", OneShotScheduler.class);
  84
  85         Filter replacer = mGraph.getFilter("replacer");
  86         replacer.setInputValue("learningDoneListener", mLearningListener);
  87     }
  88
  89     @Override
  90     public void setParameter(String parameterKey, Object value) {
  91         if (parameterKey.equals("source")) {
  92             Filter background = mGraph.getFilter("background");
  93             background.setInputValue("sourceUrl", value);
  94         } else if (parameterKey.equals("context")) {
  95             Filter background = mGraph.getFilter("background");
  96             background.setInputValue("context", value);
  97         }
  98     }
  99
 100     @Override
 101     public void setUpdateListener(EffectUpdateListener listener) {
 102         mEffectListener = listener;
 103     }
 104
 105 }