MediaExtractor.h revision dcd25efb46c41c8d24a0a9cf61fb57f84149709e
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 MEDIA_EXTRACTOR_H_ 18 19#define MEDIA_EXTRACTOR_H_ 20 21#include <utils/RefBase.h> 22 23namespace android { 24 25class DataSource; 26class MediaSource; 27class MetaData; 28 29class MediaExtractor : public RefBase { 30public: 31 static sp<MediaExtractor> Create( 32 const sp<DataSource> &source, const char *mime = NULL); 33 34 virtual size_t countTracks() = 0; 35 virtual sp<MediaSource> getTrack(size_t index) = 0; 36 37 enum GetTrackMetaDataFlags { 38 kIncludeExtensiveMetaData = 1 39 }; 40 virtual sp<MetaData> getTrackMetaData( 41 size_t index, uint32_t flags = 0) = 0; 42 43 // Return container specific meta-data. The default implementation 44 // returns an empty metadata object. 45 virtual sp<MetaData> getMetaData(); 46 47 enum Flags { 48 CAN_SEEK_BACKWARD = 1, 49 CAN_SEEK_FORWARD = 2, 50 CAN_PAUSE = 4, 51 }; 52 53 // If subclasses do _not_ override this, the default is 54 // CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_PAUSE 55 virtual uint32_t flags() const; 56 57 // for DRM 58 virtual void setDrmFlag(bool flag) {}; 59 virtual char* getDrmTrackInfo(size_t trackID, int *len) { 60 return NULL; 61 } 62 63protected: 64 MediaExtractor() {} 65 virtual ~MediaExtractor() {} 66 67private: 68 MediaExtractor(const MediaExtractor &); 69 MediaExtractor &operator=(const MediaExtractor &); 70}; 71 72} // namespace android 73 74#endif // MEDIA_EXTRACTOR_H_ 75