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      1 /*
      2  * Copyright (C) 2016 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.hardware.media.omx@1.0;
     18 
     19 import android.hardware.media@1.0::types;
     20 
     21 /**
     22  * Ref: frameworks/av/media/libmedia/aidl/android/IOMXBufferSource.aidl
     23  *
     24  * IOmxBufferSource is an interface for a listener for certain events from an
     25  * IOmxNode instance. Use IOmxNode::setInputSurface() to attach an
     26  * IOmxBufferSource instance to an IOmxNode instance.
     27  *
     28  * @see OMX_STATETYPE in the OpenMax IL standard.
     29  */
     30 interface IOmxBufferSource {
     31 
     32     /**
     33      * onOmxExecuting() is invoked when the node state changes to
     34      * OMX_StateExecuting state.
     35      */
     36     oneway onOmxExecuting();
     37 
     38     /**
     39      * onOmxIdle() is invoked when the node transitions from OMX_StateExecuting
     40      * to OMX_StateIdle.
     41      */
     42     oneway onOmxIdle();
     43 
     44     /**
     45      * onOmxLoaded() is invoked when the node transitions from OMX_StateIdle or
     46      * OMX_StateExecuting to OMX_StateLoaded.
     47      */
     48     oneway onOmxLoaded();
     49 
     50     /**
     51      * onInputBufferAdded() is invoked after a new input buffer is added to the
     52      * node. This may happen within IOmxNode::allocateSecureBuffer() or
     53      * IOmxNode::useBuffer().
     54      *
     55      * @param[in] buffer is the id of the added buffer.
     56      */
     57     oneway onInputBufferAdded(BufferId buffer);
     58 
     59     /**
     60      * onInputBufferEmptied() is invoked after an input buffer is emptied. This
     61      * may happen within IOmxNode::emptyBuffer().
     62      *
     63      * @param[in] buffer is the id of the emptied buffer.
     64      * @param[in] fence is the fence associated with the buffer.
     65      */
     66     oneway onInputBufferEmptied(BufferId buffer, Fence fence);
     67 };
     68 
     69