WAVExtractor.h revision 0dba73763a04d39faf999dcc5ef12af3c99535a7
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 <media/stagefright/MediaExtractor.h> 22 23namespace android { 24 25class DataSource; 26class String8; 27 28class WAVExtractor : public MediaExtractor { 29public: 30 // Extractor assumes ownership of "source". 31 WAVExtractor(const sp<DataSource> &source); 32 33 virtual size_t countTracks(); 34 virtual sp<MediaSource> getTrack(size_t index); 35 virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags); 36 37protected: 38 virtual ~WAVExtractor(); 39 40private: 41 sp<DataSource> mDataSource; 42 status_t mInitCheck; 43 bool mValidFormat; 44 uint16_t mNumChannels; 45 uint32_t mSampleRate; 46 off_t mDataOffset; 47 size_t mDataSize; 48 49 status_t init(); 50 51 WAVExtractor(const WAVExtractor &); 52 WAVExtractor &operator=(const WAVExtractor &); 53}; 54 55bool SniffWAV( 56 const sp<DataSource> &source, String8 *mimeType, float *confidence); 57 58} // namespace android 59 60#endif // WAV_EXTRACTOR_H_ 61 62