1 /*
2  * Copyright 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_CCDECODER_H_
18 
19 #define NUPLAYER_CCDECODER_H_
20 
21 #include "NuPlayer.h"
22 
23 namespace android {
24 
25 struct NuPlayer::CCDecoder : public RefBase {
26     enum {
27         kWhatClosedCaptionData,
28         kWhatTrackAdded,
29     };
30 
31     CCDecoder(const sp<AMessage> &notify);
32 
33     size_t getTrackCount() const;
34     sp<AMessage> getTrackInfo(size_t index) const;
35     status_t selectTrack(size_t index, bool select);
36     bool isSelected() const;
37     void decode(const sp<ABuffer> &accessUnit);
38     void display(int64_t timeUs);
39     void flush();
40 
41 private:
42     sp<AMessage> mNotify;
43     KeyedVector<int64_t, sp<ABuffer> > mCCMap;
44     size_t mCurrentChannel;
45     int32_t mSelectedTrack;
46     int32_t mTrackIndices[4];
47     Vector<size_t> mFoundChannels;
48 
49     bool isTrackValid(size_t index) const;
50     int32_t getTrackIndex(size_t channel) const;
51     bool extractFromSEI(const sp<ABuffer> &accessUnit);
52     sp<ABuffer> filterCCBuf(const sp<ABuffer> &ccBuf, size_t index);
53 
54     DISALLOW_EVIL_CONSTRUCTORS(CCDecoder);
55 };
56 
57 }  // namespace android
58 
59 #endif  // NUPLAYER_CCDECODER_H_
60