HiStreamer is the foundation module of the multimedia subsystem. It provides a processing pipeline and plug-ins required by the media framework, such as the file source, codecs, muxer and demuxer, and audio and video data processor.
As a media engine, HiStreamer connects to media_standard (on a Standard device) or media_lite (on a Mini or Small device) and provides application apis externally. It is divided into three layers:
The HiStreamer plug-in list is as follows:
The plug-in name | path | External dependencies | License | function | applicable scene |
---|---|---|---|---|---|
FFMPEG Adapter | plugins/ffmpeg_adapter | FFMPEG | LGPL etc. | Decapsulation: mp3, m4a, mp4, wav Decode: mp3, aac |
Small/Standard devices that support dynamic linking |
File Source | plugins/source/file_source | FileSystem | Apache | Reading file data | All the device |
Minimp3 Adapter | plugins/minimp3_adapter | minimp3 | CC0 | Decapsulation: mp3 decode : mp3 |
All the device |
Minimp4 Demuxer | plugins/demuxer/minimp4_demuxer | minimp4 | CC0 | Decapsulation: m4a | All the device |
Aac Demuxer | plugins/demuxer/aac_demuxer | NA | Apache | Decapsulation: aac | All the device |
HDI Sink | plugins/hdi_adapter | Audio HDI | Apache | play music | mini/small device |
The structure of the repository directory is as follows:
/foundation/multimedia/histreamer
├── LICENSE # License file
└── ohos.build # Build file
/foundation/multimedia/histreamer # HiStreamer media engine component business code
├─LICENSE # The license file
├─engine # The engine code
│ ├─foundation # Basic tool classes, including OS adaptation
│ ├─pipeline framework # pipeline frame
│ │ ├─core # pipeline core implementation
│ │ ├─factory # filter factory
│ │ └─filters # Several filter node implementations
│ │ ├─codec # Codec node implementation
│ │ ├─demux # Decapsulation node implementation
│ │ ├─sink # Output node implementation
│ │ └─source # Data source node implementation
│ ├─player # Player package
│ └─plugin # plug-in
│ ├─common # The underlying type definitions on which the plug-in interface depends
│ ├─core # Plug-in framework
│ ├─interface # Plug-in interface
│ └─plugins # Several plug-in implementations
│ ├─minimp3_adapter # minimp3 adapter
│ ├─ffmpeg_adapter # FFMPEG adaption (adaption into encapsulation and decapsulation, codec plug-in)
│ ├─hdi_adapter # HDI adapter (adapter to output plug-in)
│ ├─demuxer # Unpack plugin
│ ├─sink # Output plug-in
│ └─source # Data source plug-in
└─interface # Engine external interface
multimedia_histreamer
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