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 androidx.media.filterpacks.base; 18 19 import androidx.media.filterfw.*; 20 21 public final class FrameSlotSource extends SlotFilter { 22 23 public FrameSlotSource(MffContext context, String name, String slotName) { 24 super(context, name, slotName); 25 } 26 27 @Override 28 public Signature getSignature() { 29 // TODO: It would be nice if we could return the slot type here. Not currently possible 30 // as getSignature() is typically called before a FrameManager and its slots are setup. 31 return new Signature() 32 .addOutputPort("frame", Signature.PORT_REQUIRED, FrameType.any()) 33 .disallowOtherPorts(); 34 } 35 36 @Override 37 protected boolean canSchedule() { 38 return super.canSchedule() && slotHasFrame(); 39 } 40 41 @Override 42 protected void onProcess() { 43 Frame frame = getFrameManager().fetchFrame(mSlotName); 44 getConnectedOutputPort("frame").pushFrame(frame); 45 frame.release(); 46 } 47 48 } 49 50
