MediaExtractor.h revision 9d2f386dd2885eaffa11fd494ae258bb09fe6397
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, // the "seek 10secs back button" 49 CAN_SEEK_FORWARD = 2, // the "seek 10secs forward button" 50 CAN_PAUSE = 4, 51 CAN_SEEK = 8, // the "seek bar" 52 }; 53 54 // If subclasses do _not_ override this, the default is 55 // CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_SEEK | CAN_PAUSE 56 virtual uint32_t flags() const; 57 58 // for DRM 59 void setDrmFlag(bool flag) { 60 mIsDrm = flag; 61 }; 62 bool getDrmFlag() { 63 return mIsDrm; 64 } 65 virtual char* getDrmTrackInfo(size_t trackID, int *len) { 66 return NULL; 67 } 68 69protected: 70 MediaExtractor() {} 71 virtual ~MediaExtractor() {} 72 73private: 74 bool mIsDrm; 75 76 MediaExtractor(const MediaExtractor &); 77 MediaExtractor &operator=(const MediaExtractor &); 78}; 79 80} // namespace android 81 82#endif // MEDIA_EXTRACTOR_H_ 83