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Voice SDK for C++
IVideoDeviceCollection
You can get the information of video devices with this interface.

Voice SDK for C++
- API Overview
  Agora provides ensured quality of experience (QoE) for worldwide Internet-based voice and video communications through SD-RTN™.
- IRtcEngine
  The basic interface of the Agora SDK that implements the core functions of real-time communication.
- IRtcEngineEx
  This interface class contains multi-channel methods.
- IRtcEngineEventHandler
  The SDK uses the IRtcEngineEventHandler interface to send event notifications to your app. Your app can get those notifications through methods that inherit this interface.
- IMediaPlayer
  This class provides media player functions and supports multiple instances.
- IAudioEncodedFrameObserver
  The encoded audio observer.
- IAudioDeviceManager
  Audio device management methods.
- IAudioDeviceCollection
  The IAudioDeviceCollection interface. You can get the information of audio devices with this interface.
- IVideoDeviceManager
  Video device management methods.
- IVideoDeviceCollection
  You can get the information of video devices with this interface.
- IMediaEngine
  The IMediaEngine class.
- IMediaPlayerCacheManager
  This class provides methods to manage cached media files.
- IMediaPlayerCustomDataProvider
  The callback for custom media resource files.
- IMediaPlayerSourceObserver
  Provides callbacks for media players.
- IAudioPcmFrameSink
  This class is used to get raw PCM audio.
- IAudioFrameObserverBase
  The audio frame observer.
- IAudioSpectrumObserver
  The audio spectrum observer.
- IPacketObserver
  The definition of IPacketObserver.
- IMetadataObserver
  The metadata observer.
- IVideoEncodedFrameObserver
  Receives encoded video images.
- IVideoFrameObserver
  The IVideoFrameObserver class.
- IFaceInfoObserver
  Facial information observer.
- ILocalSpatialAudioEngine
  This class calculates user positions through the SDK to implement the spatial audio effect.
- IScreenCaptureSourceList
  The IScreenCaptureSourceList class. This class is returned in the getScreenCaptureSources method.
- Struct and Enum
  This page lists all the definitions of Struct and the enums for C++.
- API Sunset Notice
  This page introduces the deprecated and deleted APIs in the SDK.

IVideoDeviceCollection

You can get the information of video devices with this interface.

getCount

Gets the total number of the indexed video devices in the system.

virtual int getCount() = 0;

Returns

The total number of the indexed video devices in the system.

getDevice

Gets a specified piece of information about an indexed video device.

virtual int getDevice(int index, 
     char deviceName[MAX_DEVICE_ID_LENGTH], 
     char deviceId[MAX_DEVICE_ID_LENGTH]) = 0;

Parameters

index: The index value of the video device. The value of this parameter must be less than the value returned in getCount.
deviceName: The device name. The maximum length is MAX_DEVICE_ID_LENGTH_TYPE.
deviceId: The device ID of the video device. The maximum length is MAX_DEVICE_ID_LENGTH_TYPE.

Returns

0: Success.
< 0: Failure.

release

Releases all the resources occupied by the IVideoDeviceCollection object.

virtual void release() = 0;

setDevice

Specifies a device with the device ID.

virtual int setDevice(const char deviceId[MAX_DEVICE_ID_LENGTH]) = 0;

Parameters

deviceId: The device ID. The maximum length is MAX_DEVICE_ID_LENGTH_TYPE. Connecting or disconnecting the audio device does not change the value of deviceId.

Returns

0: Success.
< 0: Failure.