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      1 /*
      2  * Copyright (C) 2014 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 #ifndef NUPLAYER_DECODER_PASS_THROUGH_H_
     18 
     19 #define NUPLAYER_DECODER_PASS_THROUGH_H_
     20 
     21 #include "NuPlayer.h"
     22 
     23 #include "NuPlayerDecoder.h"
     24 
     25 namespace android {
     26 
     27 struct NuPlayer::DecoderPassThrough : public Decoder {
     28     DecoderPassThrough(const sp<AMessage> &notify);
     29 
     30     virtual void configure(const sp<AMessage> &format);
     31     virtual void init();
     32 
     33     virtual void signalFlush();
     34     virtual void signalResume();
     35     virtual void initiateShutdown();
     36 
     37     bool supportsSeamlessFormatChange(const sp<AMessage> &to) const;
     38 
     39 protected:
     40 
     41     virtual ~DecoderPassThrough();
     42 
     43     virtual void onMessageReceived(const sp<AMessage> &msg);
     44 
     45 private:
     46     enum {
     47         kWhatRequestABuffer     = 'reqB',
     48         kWhatConfigure          = 'conf',
     49         kWhatInputBufferFilled  = 'inpF',
     50         kWhatBufferConsumed     = 'bufC',
     51         kWhatFlush              = 'flus',
     52         kWhatShutdown           = 'shuD',
     53     };
     54 
     55     sp<AMessage> mNotify;
     56     sp<ALooper> mDecoderLooper;
     57 
     58     /** Returns true if a buffer was requested.
     59      * Returns false if at EOS or cache already full.
     60      */
     61     bool requestABuffer();
     62     bool isStaleReply(const sp<AMessage> &msg);
     63 
     64     void onConfigure(const sp<AMessage> &format);
     65     void onFlush();
     66     void onInputBufferFilled(const sp<AMessage> &msg);
     67     void onBufferConsumed(int32_t size);
     68     void requestMaxBuffers();
     69     void onShutdown();
     70 
     71     int32_t mBufferGeneration;
     72     bool    mReachedEOS;
     73     // TODO mPendingBuffersToFill and mPendingBuffersToDrain are only for
     74     // debugging. They can be removed when the power investigation is done.
     75     size_t  mPendingBuffersToFill;
     76     size_t  mPendingBuffersToDrain;
     77     size_t  mCachedBytes;
     78     AString mComponentName;
     79 
     80     DISALLOW_EVIL_CONSTRUCTORS(DecoderPassThrough);
     81 };
     82 
     83 }  // namespace android
     84 
     85 #endif  // NUPLAYER_DECODER_PASS_THROUGH_H_
     86