Main Functions

SparkRTC provides basic room functions and cross-room functions. Figure 1 shows the main function framework of each platform.

Note: Only general functions are displayed in Figure 1. For details about respective functions, see the SDK guide of each platform.

Figure 1 Functional framework
Click to enlarge

**Table 1** Function description
Category	Function	Description
Basic	Basic functions	Creates and destroys the RTC engine and specifies the location for storing logs.
	Room functions	Joins/Leaves a room, sets the user role, and creates a cross-room engine.
	Audio management	Collects/Sends local audio streams, enables/disables remote audio stream receiving, adjusts the recording/playback volume, and sets the remote audio mode.
	Video management	Creates a local/remote view and configures related parameters, and specifies whether to receive remote video streams, mirrors, and cameras.
	Screen sharing	Enables/Disables presentation subscriptions, and sets the presentation rendering mode and rotation.
	Audio file and clip management	Starts/Stops/Pauses/Resumes the playback of audio files or audio clips, and adjusts the volume.
	Detection	Enables/Disables network detection before a user joins a meeting.
	Customized audio capture and rendering	Enables/Disables customized audio capture and external audio data pushes.
	Customized video capture and rendering	Enables/Disables customized video capture, external video data pushes, and customized video stream rendering.
	Device management	Switches cameras and sets the audio output device.
Cross-room	Co-hosting across rooms refers to the scenario where the media stream of a live streamer is relayed to multiple room channels at the same time, implementing real-time communication between the live streamers. All the streamers can see each other in their rooms, and the audience in the rooms can see all the streamers. A maximum of four rooms can be connected at the same time. The ID of each room must be unique. Only one joiner can join a room at a time. If the local user is a joiner in another room, the user needs to change to a joiner from a player before joining that room. The user who joins other rooms as a player can receive streams but cannot send streams; joining rooms as a joiner allow both functions.