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Voice SDK for Flutter
DirectCdnStreamingEventHandler
DirectCdnStreamingEventHandler interface class is used by the SDK to send CDN streaming event notifications to the app. The app receives SDK event notifications by inheriting methods of this interface.

Voice SDK for Flutter
- API Overview
  Agora provides a flexible combination of APIs deployed globally to deliver reliable real-time audio and video communication.
- RtcEngine
  The base interface class of the RTC SDK that implements core real-time audio and video features.
- RtcEngineEx
  Interface class that provides multi-channel methods.
- RtcEngineEventHandler
  The RtcEngineEventHandler interface class is used by the SDK to send event notifications to the app. The app receives SDK event notifications by inheriting the methods of this interface class.
- MediaPlayer
  Class that provides media player functionality and supports multiple instances.
- MediaPlayerCacheManager
  This class provides methods for managing cached media files in the media player.
- MediaPlayerSourceObserver
  Provides callbacks for the media player.
- AudioEncodedFrameObserver
  Observer for encoded audio.
- AudioFrameObserver
  Audio observer.
- AudioFrameObserverBase
  Audio observer.
- MediaPlayerVideoFrameObserver
  Video data observer for the media player.
- VideoEncodedFrameObserver
  Class used to receive encoded video frames.
- VideoFrameObserver
  Video observer.
- AudioSpectrumObserver
  Audio spectrum observer.
- MetadataObserver
  Metadata observer.
- AudioDeviceManager
  Methods for managing audio devices.
- VideoDeviceManager
  Methods for managing video devices.
- MediaEngine
  MediaEngine class.
- DirectCdnStreamingEventHandler
  DirectCdnStreamingEventHandler interface class is used by the SDK to send CDN streaming event notifications to the app. The app receives SDK event notifications by inheriting methods of this interface.
- BaseSpatialAudioEngine
  This class contains some APIs from the LocalSpatialAudioEngine class.
- LocalSpatialAudioEngine
  This class calculates user coordinates through the SDK to implement spatial audio.
- RtcEngineExt
  Derived interface class of RtcEngine.
- MediaPlayerController
  Controller for AgoraVideoView, used to render media player video.

DirectCdnStreamingEventHandler

DirectCdnStreamingEventHandler interface class is used by the SDK to send CDN streaming event notifications to the app. The app receives SDK event notifications by inheriting methods of this interface.

onDirectCdnStreamingStateChanged

Callback for changes in CDN streaming state.

final void Function(
    DirectCdnStreamingState state,
    DirectCdnStreamingReason reason,
    String message)? onDirectCdnStreamingStateChanged;

After the host starts pushing streams directly to the CDN, when the streaming state changes, the SDK triggers this callback to report the new state, error code, and message. You can use this information for troubleshooting.

Parameters

state: Current streaming state. See DirectCdnStreamingState.
reason: Reason for the change in streaming state. See DirectCdnStreamingReason.
message: Message corresponding to the state change.

onDirectCdnStreamingStats

Callback for CDN streaming statistics.

final void Function(DirectCdnStreamingStats stats)? onDirectCdnStreamingStats;

During the process of pushing streams directly from the host to the CDN, the SDK triggers this callback once every second.

Parameters

stats: Current streaming statistics. See DirectCdnStreamingStats.