Agora RTC Objective-C API Reference Refactor

### - c -

- cacheSize : CacheStatistics
- cameraDirection : FocalLengthInfo
- canvasHeight : VideoCompositingLayout
- canvasWidth : VideoCompositingLayout
- capture_brightness_level : LocalVideoTrackStats
- capture_frame_rate : LocalVideoTrackStats
- capture_height : LocalVideoTrackStats
- capture_mouse_cursor : ScreenCaptureProfilingStatistics
- capture_out_fps : ScreenCaptureProfilingStatistics
- capture_timestamp : AudioPcmFrame
- capture_type : ScreenCaptureProfilingStatistics
- capture_width : LocalVideoTrackStats
- captureAudio : ScreenCaptureParameters
- captureBrightnessLevel : LocalVideoStats
- captured_frame_height : ScreenCaptureProfilingStatistics
- captured_frame_width : ScreenCaptureProfilingStatistics
- captureFrameHeight : LocalVideoStats
- captureFrameRate : LocalVideoStats
- captureFrameWidth : LocalVideoStats
- captureMouseCursor : ScreenCaptureParameters
- captureSignalVolume : ScreenAudioParameters
- captureTimeMs : EncodedAudioFrameInfo , EncodedVideoFrameInfo
- ccMode : SenderOptions
- channel_action_counter : ILocalUser::ANAStats
- channel_num : MediaRecorderConfiguration
- channelId : DataChannelConfig , EchoTestConfiguration , ExtensionInfo , IMetadataObserver::Metadata , MixedAudioStream , RecorderStreamInfo , RtcConnection , TConnectionInfo , TConnectSettings , VideoTrackInfo , VideoLayout
- channelName : ChannelMediaInfo
- channelNum : AudioPcmDataInfo
- channelProfile : AgoraServiceConfiguration , ChannelMediaOptions , RtcConnectionConfiguration , RtcEngineContext
- channels : IAudioFrameObserverBase::AudioFrame , AudioParameters , AudioSinkWants , ScreenAudioParameters
- chatMode : AudioSessionConfiguration
- clientRoleType : ChannelMediaOptions , RtcConnectionConfiguration
- codec : AudioEncodedFrameInfo , EncodedAudioFrameInfo
- codec_name : ILocalUser::LocalAudioDetailedStats
- codec_payload_type : ILocalUser::LocalAudioDetailedStats
- codec_type : IExtensionVideoCodecProvider::ExtensionVideoCodecInfo
- codecCapMask : CodecCapInfo
- codecLevels : CodecCapInfo
- codecName : PlayerStreamInfo
- codecType : CodecCapInfo , EncodedVideoFrameInfo , LocalVideoStats , SenderOptions , VideoEncoderConfiguration , VideoTrackInfo
- color : VirtualBackgroundSource
- color_space : VideoFrameData
- colorSpace : ExternalVideoFrame , VideoFrame
- compact_interval : SyncConfig
- compressionLength : DataChannelConfig
- compressionPreference : AdvanceOptions
- configs : SimulcastConfig
- connection_timeout : SyncConfig
- connectionIp : TConnectionInfo
- connectTimeMs : RtcStats
- container : AList< T >
- containerFormat : MediaRecorderConfiguration
- context : AgoraServiceConfiguration , RtcEngineContext
- context_type : TextureInfo
- cpuAppUsage : RtcStats
- cpuTotalUsage : RtcStats
- cropArea : VideoCanvas
- cropBottom : ExternalVideoFrame
- cropLeft : ExternalVideoFrame
- cropRight : ExternalVideoFrame
- cropTop : ExternalVideoFrame
- current_downscale_level : DownlinkNetworkInfo::PeerDownlinkInfo
- customVideoTrackId : ChannelMediaOptions , DirectCdnStreamingMediaOptions
- cvpixelbuffer : VideoFrameData