#include <AgoraMediaBase.h>

Inherited by agora::media::IAudioFrameObserver.

Classes
struct	AudioFrame

struct	AudioParams

Public Types
enum	AUDIO_FRAME_TYPE { FRAME_TYPE_PCM16 = 0 }

enum	{ MAX_HANDLE_TIME_CNT = 10 }

enum	AUDIO_FRAME_POSITION { AUDIO_FRAME_POSITION_NONE = 0x0000 , AUDIO_FRAME_POSITION_PLAYBACK = 0x0001 , AUDIO_FRAME_POSITION_RECORD = 0x0002 , AUDIO_FRAME_POSITION_MIXED = 0x0004 , AUDIO_FRAME_POSITION_BEFORE_MIXING = 0x0008 , AUDIO_FRAME_POSITION_EAR_MONITORING = 0x0010 }

Public Member Functions
virtual	~IAudioFrameObserverBase ()

virtual bool	onRecordAudioFrame (const char *channelId, AudioFrame &audioFrame)=0

virtual bool	onPlaybackAudioFrame (const char *channelId, AudioFrame &audioFrame)=0

virtual bool	onMixedAudioFrame (const char *channelId, AudioFrame &audioFrame)=0

virtual bool	onEarMonitoringAudioFrame (AudioFrame &audioFrame)=0

virtual bool	onPlaybackAudioFrameBeforeMixing (const char *channelId, base::user_id_t userId, AudioFrame &audioFrame)

virtual int	getObservedAudioFramePosition ()=0

virtual AudioParams	getPlaybackAudioParams ()=0

virtual AudioParams	getRecordAudioParams ()=0

virtual AudioParams	getMixedAudioParams ()=0

virtual AudioParams	getEarMonitoringAudioParams ()=0

Detailed Description

The IAudioFrameObserverBase class.

Member Enumeration Documentation

◆ AUDIO_FRAME_TYPE

enum agora::media::IAudioFrameObserverBase::AUDIO_FRAME_TYPE

Audio frame type.

Enumerator
FRAME_TYPE_PCM16	0: PCM 16

◆ anonymous enum

anonymous enum

Enumerator
MAX_HANDLE_TIME_CNT

◆ AUDIO_FRAME_POSITION

enum agora::media::IAudioFrameObserverBase::AUDIO_FRAME_POSITION

Enumerator
AUDIO_FRAME_POSITION_NONE
AUDIO_FRAME_POSITION_PLAYBACK	The position for observing the playback audio of all remote users after mixing
AUDIO_FRAME_POSITION_RECORD	The position for observing the recorded audio of the local user
AUDIO_FRAME_POSITION_MIXED	The position for observing the mixed audio of the local user and all remote users
AUDIO_FRAME_POSITION_BEFORE_MIXING	The position for observing the audio of a single remote user before mixing
AUDIO_FRAME_POSITION_EAR_MONITORING	The position for observing the ear monitoring audio of the local user

Constructor & Destructor Documentation

◆ ~IAudioFrameObserverBase()

virtual agora::media::IAudioFrameObserverBase::~IAudioFrameObserverBase ( )

inlinevirtual

Member Function Documentation

◆ onRecordAudioFrame()

virtual bool agora::media::IAudioFrameObserverBase::onRecordAudioFrame	(	const char *	channelId,
		AudioFrame &	audioFrame )

pure virtual

Gets the captured audio frame.

To ensure that the format of the cpatured audio frame is as expected, you can choose one of the following two methods to set the audio data format:

Method 1: After calling setRecordingAudioFrameParameters to set the audio data format and registerAudioFrameObserver to register the audio frame observer object, the SDK calculates the sampling interval according to the parameters set in the methods, and triggers the onRecordAudioFrame callback according to the sampling interval.
Method 2: After calling registerAudioFrameObserver to register the audio frame observer object, set the audio data format in the return value of the getObservedAudioFramePosition callback. The SDK then calculates the sampling interval according to the return value of the getRecordAudioParams callback, and triggers the onRecordAudioFrame callback according to the sampling interval.

Note: The priority of method 1 is higher than that of method 2. If method 1 is used to set the audio data format, the setting of method 2 is invalid.

Parameters

audioFrame	The raw audio data. See `AudioFrame`.
channelId	The channel ID.

Returns: Without practical meaning.

◆ onPlaybackAudioFrame()

virtual bool agora::media::IAudioFrameObserverBase::onPlaybackAudioFrame	(	const char *	channelId,
		AudioFrame &	audioFrame )

pure virtual

Gets the raw audio frame for playback.

To ensure that the data format of audio frame for playback is as expected, Agora recommends that you choose one of the following two methods to set the audio data format:

Method 1: After calling setPlaybackAudioFrameParameters to set the audio data format and registerAudioFrameObserver to register the audio frame observer object, the SDK calculates the sampling interval according to the parameters set in the methods, and triggers the onPlaybackAudioFrame callback according to the sampling interval.
Method 2: After calling registerAudioFrameObserver to register the audio frame observer object, set the audio data format in the return value of the getObservedAudioFramePosition callback. The SDK then calculates the sampling interval according to the return value of the getPlaybackAudioParams callback, and triggers the onPlaybackAudioFrame callback according to the sampling interval.

Note: The priority of method 1 is higher than that of method 2. If method 1 is used to set the audio data format, the setting of method 2 is invalid.

Parameters

audioFrame	The raw audio data. See `AudioFrame`.
channelId	The channel ID.

Returns: Without practical meaning.

Implemented in agora::rtc::IMediaRecorderEx.

◆ onMixedAudioFrame()

virtual bool agora::media::IAudioFrameObserverBase::onMixedAudioFrame	(	const char *	channelId,
		AudioFrame &	audioFrame )

pure virtual

Retrieves the mixed captured and playback audio frame.

To ensure that the data format of mixed captured and playback audio frame meets the expectations, Agora recommends that you choose one of the following two ways to set the data format:

Method 1: After calling setMixedAudioFrameParameters to set the audio data format and registerAudioFrameObserver to register the audio frame observer object, the SDK calculates the sampling interval according to the parameters set in the methods, and triggers the onMixedAudioFrame callback according to the sampling interval.
Method 2: After calling registerAudioFrameObserver to register the audio frame observer object, set the audio data format in the return value of the getObservedAudioFramePosition callback. The SDK then calculates the sampling interval according to the return value of the getMixedAudioParams callback, and triggers the onMixedAudioFrame callback according to the sampling interval.

Note: The priority of method 1 is higher than that of method 2. If method 1 is used to set the audio data format, the setting of method 2 is invalid.

Parameters

audioFrame	The raw audio data. See `AudioFrame`.
channelId	The channel ID.

Returns: Without practical meaning.

Implemented in agora::rtc::IMediaRecorderEx.

◆ onEarMonitoringAudioFrame()

virtual bool agora::media::IAudioFrameObserverBase::onEarMonitoringAudioFrame ( AudioFrame & audioFrame )

pure virtual

Gets the in-ear monitoring audio frame.

In order to ensure that the obtained in-ear audio data meets the expectations, Agora recommends that you choose one of the following two methods to set the in-ear monitoring-ear audio data format:

Method 1: After calling setEarMonitoringAudioFrameParameters to set the audio data format and registerAudioFrameObserver to register the audio frame observer object, the SDK calculates the sampling interval according to the parameters set in the methods, and triggers the onEarMonitoringAudioFrame callback according to the sampling interval.
Method 2: After calling registerAudioFrameObserver to register the audio frame observer object, set the audio data format in the return value of the getObservedAudioFramePosition callback. The SDK then calculates the sampling interval according to the return value of the getEarMonitoringAudioParams callback, and triggers the onEarMonitoringAudioFrame callback according to the sampling interval.

Note: The priority of method 1 is higher than that of method 2. If method 1 is used to set the audio data format, the setting of method 2 is invalid.

Parameters

audioFrame The raw audio data. See AudioFrame.

Returns: Without practical meaning.

Implemented in agora::rtc::IMediaRecorderEx.

◆ onPlaybackAudioFrameBeforeMixing()

virtual bool agora::media::IAudioFrameObserverBase::onPlaybackAudioFrameBeforeMixing	(	const char *	channelId,
		base::user_id_t	userId,
		AudioFrame &	audioFrame )

inlinevirtual

Occurs when the before-mixing playback audio frame is received.

Parameters

channelId	The channel name
userId	ID of the remote user.
audioFrame	The reference to the audio frame: AudioFrame.

Returns

true: The before-mixing playback audio frame is valid and is encoded and sent.
false: The before-mixing playback audio frame is invalid and is not encoded or sent.

Reimplemented in agora::media::IAudioFrameObserver.

◆ getObservedAudioFramePosition()

virtual int agora::media::IAudioFrameObserverBase::getObservedAudioFramePosition ( )

pure virtual

Sets the frame position for the video observer.

After successfully registering the audio data observer, the SDK uses this callback for each specific audio frame processing node to determine whether to trigger the following callbacks:

onRecordAudioFrame
onPlaybackAudioFrame
onPlaybackAudioFrameBeforeMixing
onMixedAudioFrame
onEarMonitoringAudioFrame You can set one or more positions you need to observe by modifying the return value of getObservedAudioFramePosition based on your scenario requirements: When the annotation observes multiple locations, the | (or operator) is required. To conserve system resources, you can reduce the number of frame positions that you want to observe.

Returns

a bitmask that sets the observation position, with the following values:

AUDIO_FRAME_POSITION_PLAYBACK (0x0001): This position can observe the playback audio mixed by all remote users, corresponding to the onPlaybackAudioFrame callback.
AUDIO_FRAME_POSITION_RECORD (0x0002): This position can observe the collected local user's audio, corresponding to the onRecordAudioFrame callback.
AUDIO_FRAME_POSITION_MIXED (0x0004): This position can observe the playback audio mixed by the loacl user and all remote users, corresponding to the onMixedAudioFrame callback.
AUDIO_FRAME_POSITION_BEFORE_MIXING (0x0008): This position can observe the audio of a single remote user before mixing, corresponding to the onPlaybackAudioFrameBeforeMixing callback.
AUDIO_FRAME_POSITION_EAR_MONITORING (0x0010): This position can observe the in-ear monitoring audio of the local user, corresponding to the onEarMonitoringAudioFrame callback.

◆ getPlaybackAudioParams()

virtual AudioParams agora::media::IAudioFrameObserverBase::getPlaybackAudioParams ( )

pure virtual

Sets the audio format for the onPlaybackAudioFrame callback.

You need to register the callback when calling the registerAudioFrameObserver method. After you successfully register the audio observer, the SDK triggers this callback, and you can set the audio format in the return value of this callback.

Note: The SDK triggers the onPlaybackAudioFrame callback with the AudioParams calculated sampling interval you set in the return value. The calculation formula is Sample interval (sec) = samplePerCall /( sampleRate × channel ). Ensure that the sample interval ≥ 0.01 (s).

Returns: The audio data for playback, see AudioParams.

Implemented in agora::rtc::IMediaRecorderEx.

◆ getRecordAudioParams()

virtual AudioParams agora::media::IAudioFrameObserverBase::getRecordAudioParams ( )

pure virtual

Sets the audio format for the onRecordAudioFrame callback.

You need to register the callback when calling the registerAudioFrameObserver method. After you successfully register the audio observer, the SDK triggers this callback, and you can set the audio format in the return value of this callback.

Note: The SDK triggers the onRecordAudioFrame callback with the AudioParams calculated sampling interval you set in the return value. The calculation formula is Sample interval (sec) = samplePerCall /( sampleRate × channel ). Ensure that the sample interval ≥ 0.01 (s).

Returns: The captured audio data, see AudioParams.

Implemented in agora::rtc::IMediaRecorderEx.

◆ getMixedAudioParams()

virtual AudioParams agora::media::IAudioFrameObserverBase::getMixedAudioParams ( )

pure virtual

Sets the audio format for the onMixedAudioFrame callback.

You need to register the callback when calling the registerAudioFrameObserver method. After you successfully register the audio observer, the SDK triggers this callback, and you can set the audio format in the return value of this callback.

Note: The SDK triggers the onMixedAudioFrame callback with the AudioParams calculated sampling interval you set in the return value. The calculation formula is Sample interval (sec) = samplePerCall /( sampleRate × channel ). Ensure that the sample interval ≥ 0.01 (s).

Returns: The mixed captured and playback audio data. See AudioParams.

Implemented in agora::rtc::IMediaRecorderEx.

◆ getEarMonitoringAudioParams()

virtual AudioParams agora::media::IAudioFrameObserverBase::getEarMonitoringAudioParams ( )

pure virtual

Sets the audio format for the onEarMonitoringAudioFrame callback.

You need to register the callback when calling the registerAudioFrameObserver method. After you successfully register the audio observer, the SDK triggers this callback, and you can set the audio format in the return value of this callback.

Note: The SDK triggers the onEarMonitoringAudioFrame callback with the AudioParams calculated sampling interval you set in the return value. The calculation formula is Sample interval ( sec ) = samplePerCall /( sampleRate × channel ). Ensure that the sample interval ≥ 0.01 (s).

Returns: The audio data of in-ear monitoring, see AudioParams.

Implemented in agora::rtc::IMediaRecorderEx.

Classes

Public Types

Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ AUDIO_FRAME_TYPE

◆ anonymous enum

◆ AUDIO_FRAME_POSITION

Constructor & Destructor Documentation

◆ ~IAudioFrameObserverBase()

Member Function Documentation

◆ onRecordAudioFrame()

◆ onPlaybackAudioFrame()

◆ onMixedAudioFrame()

◆ onEarMonitoringAudioFrame()

◆ onPlaybackAudioFrameBeforeMixing()

◆ getObservedAudioFramePosition()

◆ getPlaybackAudioParams()

◆ getRecordAudioParams()

◆ getMixedAudioParams()

◆ getEarMonitoringAudioParams()