1 /*
2  * Copyright (C) 2009 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 WAV_EXTRACTOR_H_
18 
19 #define WAV_EXTRACTOR_H_
20 
21 #include <utils/Errors.h>
22 #include <media/MediaExtractor.h>
23 #include <media/stagefright/MetaDataBase.h>
24 
25 namespace android {
26 
27 struct AMessage;
28 class DataSourceBase;
29 class String8;
30 
31 class WAVExtractor : public MediaExtractor {
32 public:
33     explicit WAVExtractor(DataSourceBase *source);
34 
35     virtual size_t countTracks();
36     virtual MediaTrack *getTrack(size_t index);
37     virtual status_t getTrackMetaData(MetaDataBase& meta, size_t index, uint32_t flags);
38 
39     virtual status_t getMetaData(MetaDataBase& meta);
name()40     virtual const char * name() { return "WAVExtractor"; }
41 
42     virtual ~WAVExtractor();
43 
44 private:
45     DataSourceBase *mDataSource;
46     status_t mInitCheck;
47     bool mValidFormat;
48     uint16_t mWaveFormat;
49     uint16_t mNumChannels;
50     uint32_t mChannelMask;
51     uint32_t mSampleRate;
52     uint16_t mBitsPerSample;
53     off64_t mDataOffset;
54     size_t mDataSize;
55     MetaDataBase mTrackMeta;
56 
57     status_t init();
58 
59     WAVExtractor(const WAVExtractor &);
60     WAVExtractor &operator=(const WAVExtractor &);
61 };
62 
63 }  // namespace android
64 
65 #endif  // WAV_EXTRACTOR_H_
66 
67