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      1 /*
      2  * Copyright (C) 2010 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_H_
     18 
     19 #define NUPLAYER_DECODER_H_
     20 
     21 #include "NuPlayer.h"
     22 
     23 #include <media/stagefright/foundation/AHandler.h>
     24 
     25 namespace android {
     26 
     27 struct ABuffer;
     28 struct MediaCodec;
     29 struct MediaBuffer;
     30 
     31 struct NuPlayer::Decoder : public AHandler {
     32     Decoder(const sp<AMessage> &notify,
     33             const sp<NativeWindowWrapper> &nativeWindow = NULL);
     34 
     35     virtual void configure(const sp<AMessage> &format);
     36     virtual void init();
     37 
     38     status_t getInputBuffers(Vector<sp<ABuffer> > *dstBuffers) const;
     39     virtual void signalFlush(const sp<AMessage> &format = NULL);
     40     virtual void signalUpdateFormat(const sp<AMessage> &format);
     41     virtual void signalResume();
     42     virtual void initiateShutdown();
     43 
     44     virtual bool supportsSeamlessFormatChange(const sp<AMessage> &to) const;
     45 
     46     enum {
     47         kWhatFillThisBuffer      = 'flTB',
     48         kWhatDrainThisBuffer     = 'drTB',
     49         kWhatOutputFormatChanged = 'fmtC',
     50         kWhatFlushCompleted      = 'flsC',
     51         kWhatShutdownCompleted   = 'shDC',
     52         kWhatEOS                 = 'eos ',
     53         kWhatError               = 'err ',
     54     };
     55 
     56 protected:
     57 
     58     virtual ~Decoder();
     59 
     60     virtual void onMessageReceived(const sp<AMessage> &msg);
     61 
     62 private:
     63     enum {
     64         kWhatCodecNotify        = 'cdcN',
     65         kWhatConfigure          = 'conf',
     66         kWhatGetInputBuffers    = 'gInB',
     67         kWhatInputBufferFilled  = 'inpF',
     68         kWhatRenderBuffer       = 'rndr',
     69         kWhatFlush              = 'flus',
     70         kWhatShutdown           = 'shuD',
     71         kWhatUpdateFormat       = 'uFmt',
     72     };
     73 
     74     sp<AMessage> mNotify;
     75     sp<NativeWindowWrapper> mNativeWindow;
     76 
     77     sp<AMessage> mInputFormat;
     78     sp<AMessage> mOutputFormat;
     79     sp<MediaCodec> mCodec;
     80     sp<ALooper> mCodecLooper;
     81     sp<ALooper> mDecoderLooper;
     82 
     83     List<sp<AMessage> > mPendingInputMessages;
     84 
     85     Vector<sp<ABuffer> > mInputBuffers;
     86     Vector<sp<ABuffer> > mOutputBuffers;
     87     Vector<sp<ABuffer> > mCSDsForCurrentFormat;
     88     Vector<sp<ABuffer> > mCSDsToSubmit;
     89     Vector<bool> mInputBufferIsDequeued;
     90     Vector<MediaBuffer *> mMediaBuffers;
     91 
     92     void handleError(int32_t err);
     93     bool handleAnInputBuffer();
     94     bool handleAnOutputBuffer();
     95 
     96     void releaseAndResetMediaBuffers();
     97     void requestCodecNotification();
     98     bool isStaleReply(const sp<AMessage> &msg);
     99 
    100     void onConfigure(const sp<AMessage> &format);
    101     void onFlush();
    102     void onResume();
    103     bool onInputBufferFilled(const sp<AMessage> &msg);
    104     void onRenderBuffer(const sp<AMessage> &msg);
    105     void onShutdown();
    106 
    107     int32_t mBufferGeneration;
    108     bool mPaused;
    109     AString mComponentName;
    110 
    111     bool supportsSeamlessAudioFormatChange(const sp<AMessage> &targetFormat) const;
    112     void rememberCodecSpecificData(const sp<AMessage> &format);
    113 
    114     DISALLOW_EVIL_CONSTRUCTORS(Decoder);
    115 };
    116 
    117 struct NuPlayer::CCDecoder : public RefBase {
    118     enum {
    119         kWhatClosedCaptionData,
    120         kWhatTrackAdded,
    121     };
    122 
    123     CCDecoder(const sp<AMessage> &notify);
    124 
    125     size_t getTrackCount() const;
    126     sp<AMessage> getTrackInfo(size_t index) const;
    127     status_t selectTrack(size_t index, bool select);
    128     bool isSelected() const;
    129     void decode(const sp<ABuffer> &accessUnit);
    130     void display(int64_t timeUs);
    131     void flush();
    132 
    133 private:
    134     sp<AMessage> mNotify;
    135     KeyedVector<int64_t, sp<ABuffer> > mCCMap;
    136     size_t mCurrentChannel;
    137     int32_t mSelectedTrack;
    138     int32_t mTrackIndices[4];
    139     Vector<size_t> mFoundChannels;
    140 
    141     bool isTrackValid(size_t index) const;
    142     int32_t getTrackIndex(size_t channel) const;
    143     bool extractFromSEI(const sp<ABuffer> &accessUnit);
    144     sp<ABuffer> filterCCBuf(const sp<ABuffer> &ccBuf, size_t index);
    145 
    146     DISALLOW_EVIL_CONSTRUCTORS(CCDecoder);
    147 };
    148 
    149 }  // namespace android
    150 
    151 #endif  // NUPLAYER_DECODER_H_
    152