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Mobile Live Video Broadcasting
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    V2TXLivePusherObserver

    Last updated: 2024-11-28 17:46:18
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      Copyright (c) 2021 Tencent. All rights reserved.
      
      Module: V2TXLivePusherObserver @ TXLiteAVSDK
      
      Function: Tencent Cloud live pusher callback notification
      

      Function

      Callback notification for push streaming of Tencent Cloud Live.

      Introduce

      You can receive some push notifications from the V2TXLivePusher pusher, including the connection status of the pusher, callback of the first frame of audio and video, statistical data, warning and error messages, etc.
      
      V2TXLivePusherObserver

      V2TXLivePusherObserver

      FuncList
      DESC
      Live pusher error notification, which is called back when the pusher encounters an error
      Live pusher warning notification
      Callback notification indicating that collection of the first audio frame is complete
      Callback notification indicating that collection of the first video frame is complete
      Microphone-collected volume callback
      Callback notification of the pusher connection status
      Live pusher statistics callback
      Screenshot callback
      Audio data captured by the local mic, pre-processed by the audio module, effect-processed and BGM-mixed
      Custom video processing callback
      Callback of destroying the OpenGL context in the SDK
      Callback of setting On-Cloud MixTranscoding parameters, which corresponds to the setMixTranscodingConfig API
      The SDK returns this callback when you call startScreenCapture and other APIs to start screen sharing.
      The SDK returns this callback when you call stopScreenCapture to stop screen sharing
      The SDK returns this callback when you call startLocalRecording to start local recording.
      The SDK returns this callback when you call startLocalRecording to start local recording, which means recording task in progress.
      The SDK returns this callback when you call stopLocalRecording to start local recording.
      After calling enableVoiceActivityDetection to turn on voice activity detection, you will receive this callback notification when the anchor starts or stops speaking.

      onError:message:extraInfo:

      onError:message:extraInfo:
      - (void)onError:
      (V2TXLiveCode)code
      message:
      (NSString *)msg
      extraInfo:
      (NSDictionary *)extraInfo

      Live pusher error notification, which is called back when the pusher encounters an error

      Param
      DESC
      code
      Error code V2TXLiveCode.
      extraInfo
      Extended information.
      msg
      Error message.

      onWarning:message:extraInfo:

      onWarning:message:extraInfo:
      - (void)onWarning:
      (V2TXLiveCode)code
      message:
      (NSString *)msg
      extraInfo:
      (NSDictionary *)extraInfo

      Live pusher warning notification

      Param
      DESC
      code
      Warning code V2TXLiveCode.
      extraInfo
      Extended information.
      msg
      Warning message.

      onCaptureFirstAudioFrame

      onCaptureFirstAudioFrame

      Callback notification indicating that collection of the first audio frame is complete

      onCaptureFirstVideoFrame

      onCaptureFirstVideoFrame

      Callback notification indicating that collection of the first video frame is complete

      onMicrophoneVolumeUpdate:

      onMicrophoneVolumeUpdate:
      - (void)onMicrophoneVolumeUpdate:
      (NSInteger)volume

      Microphone-collected volume callback

      Param
      DESC
      volume
      Current volume value for collection.
      Note
      This callback notification is received after enableVolumeEvaluation is called.

      onPushStatusUpdate:message:extraInfo:

      onPushStatusUpdate:message:extraInfo:
      - (void)onPushStatusUpdate:
      (V2TXLivePushStatus)status
      message:
      (NSString *)msg
      extraInfo:
      (NSDictionary *)extraInfo

      Callback notification of the pusher connection status

      Param
      DESC
      extraInfo
      Extended information.
      msg
      Connection status message.
      status
      Pusher connection status V2TXLivePushStatus .

      onStatisticsUpdate:

      onStatisticsUpdate:
      - (void)onStatisticsUpdate:
      (V2TXLivePusherStatistics *)statistics

      Live pusher statistics callback

      Param
      DESC
      statistics
      Pusher statistics V2TXLivePusherStatistics .

      onSnapshotComplete:

      onSnapshotComplete:
      - (void)onSnapshotComplete:
      (nullable TXImage *)image

      Screenshot callback

      Param
      DESC
      image
      Captured video image.
      Note
      This callback notification will be received after calling snapshot .

      onProcessAudioFrame:

      onProcessAudioFrame:
      - (void) onProcessAudioFrame:
      (V2TXLiveAudioFrame *)frame

      Audio data captured by the local mic, pre-processed by the audio module, effect-processed and BGM-mixed

      After you configure the callback of custom audio processing, the SDK will return via this callback the data captured, pre-processed (ANS, AEC, and AGC), effect-processed and BGM-mixed in PCM format, before it is submitted to the network module for encoding.
      The audio data returned via this callback is in PCM format and has a fixed frame length (time) of 0.02s.
      The formula to convert a frame length in seconds to one in bytes is sample rate * frame length in seconds * number of sound channels * audio bit depth.
      Assume that the audio is recorded on a single channel with a sample rate of 48,000 Hz and audio bit depth of 16 bits, which are the default settings of TRTC. The frame length in bytes will be 48000 * 0.02s * 1 * 16 bits = 15360 bits = 1920 bytes.
      Param
      DESC
      frame
      Audio frames in PCM format
      Note
      1. Please avoid time-consuming operations in this callback function. The SDK processes an audio frame every 20 ms, so if your operation takes more than 20 ms, it will cause audio exceptions.
      2. The audio data returned via this callback can be read and modified, but please keep the duration of your operation short.

      onProcessVideoFrame:dstFrame:

      onProcessVideoFrame:dstFrame:
      - (void)onProcessVideoFrame:
      (V2TXLiveVideoFrame * _Nonnull)srcFrame
      dstFrame:
      (V2TXLiveVideoFrame * _Nonnull)dstFrame

      Custom video processing callback

      Param
      DESC
      dstFrame
      For images after processing.
      srcFrame
      For images before processing.
      Note
      You will receive this callback only after you call enableCustomVideoProcess
      to enable custom video processing.
      Case 1: The beauty filter component generates new textures.
      If the beauty filter component you use generates a new texture frame (for the processed image) during image processing, please set dstFrame.textureId to a new texture ID in the callback API.
      (void) onProcessVideoFrame:(V2TXLiveVideoFrame * _Nonnull)srcFrame dstFrame:(V2TXLiveVideoFrame * _Nonnull)dstFrame
      {
      GLuint dstTextureId = renderItemWithTexture(srcFrame.textureId, srcFrame.width, srcFrame.height);
      dstFrame.textureId = dstTextureId;
      return 0;
      }
      Case 2: The third-party beauty filter component doesn’t generate new textures.
      If the third-party beauty filter component you use does not generate new textures and you need to manually set an input texture and an output texture for the component, please consider the following scheme:
      (void) onProcessVideoFrame:(V2TXLiveVideoFrame * _Nonnull)srcFrame dstFrame:(V2TXLiveVideoFrame * _Nonnull)dstFrame
      {
      thirdparty_process(srcFrame.textureId, srcFrame.width, srcFrame.height, dstFrame.textureId);
      return 0;
      }

      onGLContextDestroyed

      onGLContextDestroyed

      Callback of destroying the OpenGL context in the SDK

      onSetMixTranscodingConfig:message:

      onSetMixTranscodingConfig:message:
      - (void)onSetMixTranscodingConfig:
      (V2TXLiveCode)code
      message:
      (NSString *)msg

      Callback of setting On-Cloud MixTranscoding parameters, which corresponds to the {@link setMixTranscodingConfig} API

      Param
      DESC
      code
      0: successful; other values: failed.
      msg
      Error message.

      onScreenCaptureStarted

      onScreenCaptureStarted

      The SDK returns this callback when you call {@link startScreenCapture} and other APIs to start screen sharing.

      onScreenCaptureStopped:

      onScreenCaptureStopped:
      - (void)onScreenCaptureStopped:
      (int)reason

      The SDK returns this callback when you call {@link stopScreenCapture} to stop screen sharing

      Param
      DESC
      Reason
      for stop.
      0 : Screen capture stopped by user.
      1 : On iOS platform means the screen recording is interrupted by the system; Mac, Windows means the screen sharing window is closed.
      2 : On windows platform indicates that the display screen status of screen sharing is changed (such as the interface is pulled out, the projection mode is changed, etc.); other platforms do not throw.

      onLocalRecordBegin:storagePath:

      onLocalRecordBegin:storagePath:
      - (void)onLocalRecordBegin:
      (NSInteger)errCode
      storagePath:
      (NSString *)storagePath

      The SDK returns this callback when you call {@link startLocalRecording} to start local recording.

      Param
      DESC
      code
      status.
      0: successful.
      -1: failed.
      -2: unsupported format.
      -6: recording has been started. Stop recording first.
      -7: recording file already exists and needs to be deleted.
      -8: recording directory does not have the write permission. Please check the directory permission.
      storagePath
      recording filePath.

      onLocalRecording:storagePath:

      onLocalRecording:storagePath:
      - (void)onLocalRecording:
      (NSInteger)durationMs
      storagePath:
      (NSString *)storagePath

      The SDK returns this callback when you call {@link startLocalRecording} to start local recording, which means recording task in progress.

      Param
      DESC
      durationMs
      recording duration.
      storagePath
      recording filePath.

      onLocalRecordComplete:storagePath:

      onLocalRecordComplete:storagePath:
      - (void)onLocalRecordComplete:
      (NSInteger)errCode
      storagePath:
      (NSString *)storagePath

      The SDK returns this callback when you call {@link stopLocalRecording} to start local recording.

      Param
      DESC
      code
      status
      0: successful.
      -1: failed.
      -2: Switching resolution or horizontal and vertical screen causes the recording to stop.
      -3: recording duration is too short or no video or audio data is received. Check the recording duration or whether audio or video capture is enabled.
      storagePath
      recording filePath.

      onVoiceActivityDetectionUpdate:

      onVoiceActivityDetectionUpdate:
      - (void)onVoiceActivityDetectionUpdate:
      (BOOL)active

      After calling {@link enableVoiceActivityDetection} to turn on voice activity detection, you will receive this callback notification when the anchor starts or stops speaking.

      Param
      DESC
      active
      The voice starts or stops.
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