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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;
     18 
     19 import android.OMXFenceParcelable;
     20 
     21 /**
     22  * Binder interface for a buffer source to be used together with an OMX encoder
     23  *
     24  * @hide
     25  */
     26 interface IOMXBufferSource {
     27     /**
     28      * This is called when OMX transitions to OMX_StateExecuting, which means
     29      * we can start handing it buffers.  If we already have buffers of data
     30      * sitting in the BufferQueue, this will send them to the codec.
     31      */
     32     void onOmxExecuting();
     33 
     34     /**
     35      * This is called when OMX transitions to OMX_StateIdle, indicating that
     36      * the codec is meant to return all buffers back to the client for them
     37      * to be freed. Do NOT submit any more buffers to the component.
     38      */
     39     void onOmxIdle();
     40 
     41     /**
     42      * This is called when OMX transitions to OMX_StateLoaded, indicating that
     43      * we are shutting down.
     44      */
     45     void onOmxLoaded();
     46 
     47     /**
     48      * A "codec buffer", i.e. a buffer that can be used to pass data into
     49      * the encoder, has been allocated.
     50      */
     51     void onInputBufferAdded(int bufferID);
     52 
     53     /**
     54      * Called from OnEmptyBufferDone. If we have a BQ buffer available,
     55      * fill it with a new frame of data; otherwise, just mark it as available.
     56      *
     57      * fenceParcel contains the fence's fd that the callee should wait on before
     58      * using the buffer (or pass on to the user of the buffer, if the user supports
     59      * fences). Callee takes ownership of the fence fd even if it fails.
     60      */
     61     void onInputBufferEmptied(int bufferID, in OMXFenceParcelable fenceParcel);
     62 }