| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef MEDIA_EXTRACTOR_H_ |
| |
| #define MEDIA_EXTRACTOR_H_ |
| |
| #include <media/IMediaExtractor.h> |
| #include <media/IMediaSource.h> |
| #include <media/MediaAnalyticsItem.h> |
| |
| namespace android { |
| class DataSource; |
| struct MediaSource; |
| class MetaData; |
| |
| class MediaExtractor : public BnMediaExtractor { |
| public: |
| static sp<IMediaExtractor> Create( |
| const sp<DataSource> &source, const char *mime = NULL); |
| static sp<MediaExtractor> CreateFromService( |
| const sp<DataSource> &source, const char *mime = NULL); |
| |
| virtual size_t countTracks() = 0; |
| virtual sp<IMediaSource> getTrack(size_t index) = 0; |
| |
| enum GetTrackMetaDataFlags { |
| kIncludeExtensiveMetaData = 1 |
| }; |
| virtual sp<MetaData> getTrackMetaData( |
| size_t index, uint32_t flags = 0) = 0; |
| |
| // Return container specific meta-data. The default implementation |
| // returns an empty metadata object. |
| virtual sp<MetaData> getMetaData(); |
| |
| status_t getMetrics(Parcel *reply); |
| |
| enum Flags { |
| CAN_SEEK_BACKWARD = 1, // the "seek 10secs back button" |
| CAN_SEEK_FORWARD = 2, // the "seek 10secs forward button" |
| CAN_PAUSE = 4, |
| CAN_SEEK = 8, // the "seek bar" |
| }; |
| |
| // If subclasses do _not_ override this, the default is |
| // CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_SEEK | CAN_PAUSE |
| virtual uint32_t flags() const; |
| |
| // for DRM |
| virtual char* getDrmTrackInfo(size_t /*trackID*/, int * /*len*/) { |
| return NULL; |
| } |
| virtual void setUID(uid_t /*uid*/) { |
| } |
| virtual status_t setMediaCas(const HInterfaceToken &/*casToken*/) override { |
| return INVALID_OPERATION; |
| } |
| |
| virtual const char * name() { return "<unspecified>"; } |
| |
| virtual void release() {} |
| |
| protected: |
| MediaExtractor(); |
| virtual ~MediaExtractor(); |
| |
| MediaAnalyticsItem *mAnalyticsItem; |
| |
| virtual void populateMetrics(); |
| |
| private: |
| |
| typedef bool (*SnifferFunc)( |
| const sp<DataSource> &source, String8 *mimeType, |
| float *confidence, sp<AMessage> *meta); |
| |
| static Mutex gSnifferMutex; |
| static List<SnifferFunc> gSniffers; |
| static bool gSniffersRegistered; |
| |
| // The sniffer can optionally fill in "meta" with an AMessage containing |
| // a dictionary of values that helps the corresponding extractor initialize |
| // its state without duplicating effort already exerted by the sniffer. |
| static void RegisterSniffer_l(SnifferFunc func); |
| |
| static bool sniff(const sp<DataSource> &source, |
| String8 *mimeType, float *confidence, sp<AMessage> *meta); |
| |
| static void RegisterDefaultSniffers(); |
| |
| MediaExtractor(const MediaExtractor &); |
| MediaExtractor &operator=(const MediaExtractor &); |
| }; |
| |
| } // namespace android |
| |
| #endif // MEDIA_EXTRACTOR_H_ |