This section explains how to transmit audio and video to users in a channel. More...

Typedefs
typedef enum StreamType	StreamType
	The types of streams which are available for transmission. More...

typedef UINT32	StreamTypes
	Mask of StreamType. More...

Enumerations
enum	StreamType { STREAMTYPE_NONE = 0x00000000 , STREAMTYPE_VOICE = 0x00000001 , STREAMTYPE_VIDEOCAPTURE = 0x00000002 , STREAMTYPE_MEDIAFILE_AUDIO = 0x00000004 , STREAMTYPE_MEDIAFILE_VIDEO = 0x00000008 , STREAMTYPE_DESKTOP = 0x00000010 , STREAMTYPE_DESKTOPINPUT = 0x00000020 , STREAMTYPE_MEDIAFILE , STREAMTYPE_CHANNELMSG = 0x00000040 , STREAMTYPE_LOCALMEDIAPLAYBACK_AUDIO = 0x00000080 , STREAMTYPE_CLASSROOM_ALL }
	The types of streams which are available for transmission. More...

Functions
TEAMTALKDLL_API TTBOOL	TT_InsertAudioBlock (IN TTInstance lpTTInstance, IN const AudioBlock lpAudioBlock)
	Transmit application provided raw audio in AudioBlock-structs as STREAMTYPE_VOICE, i.e. microphone input. More...

TEAMTALKDLL_API TTBOOL	TT_EnableVoiceTransmission (IN TTInstance *lpTTInstance, IN TTBOOL bEnable)
	Start/stop transmitting of voice data from sound input. More...

TEAMTALKDLL_API TTBOOL	TT_EnableVoiceActivation (IN TTInstance *lpTTInstance, IN TTBOOL bEnable)
	Enable voice activation. More...

TEAMTALKDLL_API TTBOOL	TT_SetVoiceActivationLevel (IN TTInstance *lpTTInstance, IN INT32 nLevel)
	Set voice activation level. More...

TEAMTALKDLL_API INT32	TT_GetVoiceActivationLevel (IN TTInstance *lpTTInstance)
	Get voice activation level. More...

TEAMTALKDLL_API TTBOOL	TT_SetVoiceActivationStopDelay (IN TTInstance *lpTTInstance, IN INT32 nDelayMSec)
	Set the delay of when voice activation should be stopped. More...

TEAMTALKDLL_API INT32	TT_GetVoiceActivationStopDelay (IN TTInstance *lpTTInstance)
	Get the delay of when voice active state should be disabled. More...

TEAMTALKDLL_API TTBOOL	TT_StartRecordingMuxedAudioFile (IN TTInstance lpTTInstance, IN const AudioCodec lpAudioCodec, IN const TTCHAR *szAudioFileName, IN AudioFileFormat uAFF)
	Store all audio conversations with specific AudioCodec settings to a single file. More...

TEAMTALKDLL_API TTBOOL	TT_StartRecordingMuxedAudioFileEx (IN TTInstance lpTTInstance, IN INT32 nChannelID, IN const TTCHAR szAudioFileName, IN AudioFileFormat uAFF)
	Store audio conversations from a specific channel into a single file. More...

TEAMTALKDLL_API TTBOOL	TT_StartRecordingMuxedStreams (IN TTInstance lpTTInstance, IN StreamTypes uStreamTypes, IN const AudioCodec lpAudioCodec, IN const TTCHAR *szAudioFileName, IN AudioFileFormat uAFF)
	Mix multiple StreamTypes into a single audio file. More...

TEAMTALKDLL_API TTBOOL	TT_StopRecordingMuxedAudioFile (IN TTInstance *lpTTInstance)
	Stop an active muxed audio recording. More...

TEAMTALKDLL_API TTBOOL	TT_StopRecordingMuxedAudioFileEx (IN TTInstance *lpTTInstance, IN INT32 nChannelID)
	Stop recording conversations from a channel to a single file. More...

TEAMTALKDLL_API TTBOOL	TT_StartVideoCaptureTransmission (IN TTInstance lpTTInstance, IN const VideoCodec lpVideoCodec)
	Start transmitting from video capture device. More...

TEAMTALKDLL_API TTBOOL	TT_StopVideoCaptureTransmission (IN TTInstance *lpTTInstance)
	Stop transmitting from video capture device. More...

Detailed Description

This section explains how to transmit audio and video to users in a channel.

Once the client instance has joined a channel it can transmit audio, video and desktops to other users in the channel.

To transmit audio the client must have the flag CLIENT_SNDINPUT_READY enabled which is done in the function TT_InitSoundInputDevice. To transmit video requires the flag CLIENT_VIDEOCAPTURE_READY which is enabled by the function TT_InitVideoCaptureDevice. To hear what others users are saying a sound output device must have been configured using TT_InitSoundOutputDevice and thereby have enabled the flag CLIENT_SNDOUTPUT_READY.

Calling TT_EnableVoiceTransmission() will make the client instance start transmitting voice data. Voice transmission can also be activated automatically using voice activation. This is done by called TT_EnableVoiceActivation() and setting a voice activation level using TT_SetVoiceActivationLevel(). Note that voice transmission requires USERRIGHT_TRANSMIT_VOICE.

Calling TT_StartVideoCaptureTransmission() will make the client instance start transmission video data from a video capture device (typically a webcam). Note that video capture transmission requires USERRIGHT_TRANSMIT_VIDEOCAPTURE.

Typedef Documentation

◆ StreamType

typedef enum StreamType StreamType

The types of streams which are available for transmission.

◆ StreamTypes

typedef UINT32 StreamTypes

Mask of StreamType.

Definition at line 273 of file TeamTalk.h.

Enumeration Type Documentation

◆ StreamType

enum StreamType

The types of streams which are available for transmission.

Enumerator
STREAMTYPE_NONE	No stream.
STREAMTYPE_VOICE	Voice stream type which is audio recorded from a sound input device. See also TT_InitSoundInputDevice()
STREAMTYPE_VIDEOCAPTURE	Video capture stream type which is video recorded from a webcam. See also TT_InitVideoCaptureDevice()
STREAMTYPE_MEDIAFILE_AUDIO	Audio stream type from a media file which is being streamed. See also TT_StartStreamingMediaFileToChannel()
STREAMTYPE_MEDIAFILE_VIDEO	Video stream type from a media file which is being streamed. See also TT_StartStreamingMediaFileToChannel()
STREAMTYPE_DESKTOP	Desktop window stream type which is a window (or bitmap) being transmitted. See also TT_SendDesktopWindow()
STREAMTYPE_DESKTOPINPUT	Desktop input stream type which is keyboard or mouse input being transmitted. See also TT_SendDesktopInput()
STREAMTYPE_MEDIAFILE	Shortcut to allow both audio and video media files.
STREAMTYPE_CHANNELMSG	Channel text messages as stream type. A channel text message is not a stream but is only included as a stream type in order to be able to block messages using @c transmitUsers in #Channel struct. @see TT_DoUpdateChannel() @see CHANNEL_CLASSROOM.
STREAMTYPE_LOCALMEDIAPLAYBACK_AUDIO	Stream type for audio of local playback. TT_EnableAudioBlockEvent() can be used to intercept audio from a local media playback. @see TT_InitLocalPlayback()
STREAMTYPE_CLASSROOM_ALL	Shortcut to allow voice, media files, desktop, webcamera and channel messages.

Definition at line 221 of file TeamTalk.h.

Function Documentation

◆ TT_InsertAudioBlock()

TEAMTALKDLL_API TTBOOL TT_InsertAudioBlock	(	IN TTInstance *	lpTTInstance,
		IN const AudioBlock *	lpAudioBlock
	)

Transmit application provided raw audio in AudioBlock-structs as STREAMTYPE_VOICE, i.e. microphone input.

Since STREAMTYPE_VOICE is being replaced by audio input this means that while audio input is active then subsequent calls to TT_EnableVoiceTransmission() or TT_EnableVoiceActivation() will fail until the audio input has ended.

If the flags CLIENT_TX_VOICE or CLIENT_SNDINPUT_VOICEACTIVATED are active then calling TT_InputAudioBlock() will fail because STREAMTYPE_VOICE is already in use.

TT_InsertAudioBlock() can be called multiple times until the client instance's internal queue is full. When the queue has been filled then monitor CLIENTEVENT_AUDIOINPUT to see when more data can be queued.

To end raw audio input set parameter lpAudioBlock to NULL and then TT_EnableVoiceTransmission() or TT_StartStreamingMediaFileToChannel() will be available again.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
lpAudioBlock	The audio to submit as audio input. The member `nStreamID` of AudioBlock is used to identify the audio input session which is currently in progress and is posted as the `nSource` of CLIENTEVENT_AUDIOINPUT. The member `uSampleIndex` of AudioBlock is ignored.

◆ TT_EnableVoiceTransmission()

TEAMTALKDLL_API TTBOOL TT_EnableVoiceTransmission	(	IN TTInstance *	lpTTInstance,
		IN TTBOOL	bEnable
	)

Start/stop transmitting of voice data from sound input.

Sound input is initialized using TT_InitSoundInputDevice() or TT_InitSoundDuplexDevices().

Voice transmission is stream type STREAMTYPE_VOICE.

User rights required:

USERRIGHT_TRANSMIT_VOICE

Note that voice activation cannot be enabled when TT_InsertAudioBlock() is active.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
bEnable	Enable/disable transmission.

Returns: TRUE on success. FALSE if voice transmission could not be activated on the client instance.

◆ TT_EnableVoiceActivation()

TEAMTALKDLL_API TTBOOL TT_EnableVoiceActivation	(	IN TTInstance *	lpTTInstance,
		IN TTBOOL	bEnable
	)

Enable voice activation.

The client instance will start transmitting audio if the recorded audio level is above or equal to the voice activation level set by TT_SetVoiceActivationLevel(). Once the voice activation level is reached the event CLIENTEVENT_VOICE_ACTIVATION is posted.

The current volume level can be queried calling TT_GetSoundInputLevel.

Voice transmission is stream type STREAMTYPE_VOICE.

User rights required:

USERRIGHT_TRANSMIT_VOICE

Note that voice activation cannot be enabled when TT_InsertAudioBlock() is active.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
bEnable	TRUE to enable, otherwise FALSE.

Returns: TRUE on success. FALSE if voice activation cannot be enabled on the client instance.

See also: CLIENT_SNDINPUT_VOICEACTIVATION; TT_SetVoiceActivationStopDelay

◆ TT_SetVoiceActivationLevel()

TEAMTALKDLL_API TTBOOL TT_SetVoiceActivationLevel	(	IN TTInstance *	lpTTInstance,
		IN INT32	nLevel
	)

Set voice activation level.

The current volume level can be queried calling TT_GetSoundInputLevel(). When TT_GetSoundInputLevel() is greater or equal to voice activation level then CLIENTEVENT_VOICE_ACTIVATION is triggered.

If WebRTCAudioPreprocessor is active with voicedetection enabled then TT_SetVoiceActivationLevel() is not applicable.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
nLevel	Must be between SOUND_VU_MIN and SOUND_VU_MAX

See also: TT_EnableVoiceActivation; TT_GetVoiceActivationLevel; TT_SetVoiceActivationStopDelay

◆ TT_GetVoiceActivationLevel()

TEAMTALKDLL_API INT32 TT_GetVoiceActivationLevel ( IN TTInstance * lpTTInstance )

Get voice activation level.

Parameters

lpTTInstance Pointer to client instance created by TT_InitTeamTalk.

Returns: Returns A value between SOUND_VU_MIN and SOUND_VU_MAX

See also: TT_EnableVoiceActivation; TT_SetVoiceActivationLevel

◆ TT_SetVoiceActivationStopDelay()

TEAMTALKDLL_API TTBOOL TT_SetVoiceActivationStopDelay	(	IN TTInstance *	lpTTInstance,
		IN INT32	nDelayMSec
	)

Set the delay of when voice activation should be stopped.

When TT_GetSoundInputLevel() becomes higher than the specified voice activation level the client instance will start transmitting until TT_GetSoundInputLevel() becomes lower than the voice activation level, plus a delay. This delay is by default set to 1500 msec but this value can be changed by calling TT_SetVoiceActivationStopDelay().

See also: TT_EnableVoiceActivation; TT_SetVoiceActivationLevel

◆ TT_GetVoiceActivationStopDelay()

TEAMTALKDLL_API INT32 TT_GetVoiceActivationStopDelay ( IN TTInstance * lpTTInstance )

Get the delay of when voice active state should be disabled.

Returns: The number of miliseconds before voice activated state should be turned back to inactive.

See also: TT_SetVoiceActivationStopDelay; TT_EnableVoiceActivation; TT_SetVoiceActivationLevel

◆ TT_StartRecordingMuxedAudioFile()

TEAMTALKDLL_API TTBOOL TT_StartRecordingMuxedAudioFile	(	IN TTInstance *	lpTTInstance,
		IN const AudioCodec *	lpAudioCodec,
		IN const TTCHAR *	szAudioFileName,
		IN AudioFileFormat	uAFF
	)

Store all audio conversations with specific AudioCodec settings to a single file.

To record conversations from a specific channel to a single file call TT_StartRecordingMuxedAudioFileEx().

TT_StartRecordingMuxedAudioFile() can be used to record conversations "across" channels given that the channels use the same AudioCodec properties (i.e. audiocodec member of Channel). To receive audio outside the TeamTalk instance's channel use TT_DoSubscribe() and SUBSCRIBE_INTERCEPT_VOICE.

If the user changes to a channel which uses a different audio codec then the recording will continue but simply be silent until the user again joins a channel with the same audio codec as was used for initializing muxed audio recording.

Calling TT_StartRecordingMuxedAudioFile() will enable the CLIENT_MUX_AUDIOFILE flag from TT_GetFlags().

Call TT_StopRecordingMuxedAudioFile() to stop recording. Note that only one muxed audio recording can be active at the same time.

Only STREAMTYPE_VOICE is stored into the audio file, not STREAMTYPE_MEDIAFILE_AUDIO. To record other stream types use TT_StartRecordingMuxedStreams().

TT_StartRecordingMuxedAudioFile() is mutually exclusive with TT_StartRecordingMuxedStreams().

Use TT_SetUserMediaStorageDir() to store users' audio streams in separate files.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
lpAudioCodec	The audio codec which should be used as reference for muxing users' audio streams. In most situations this is the AudioCodec of the current channel, i.e. TT_GetMyChannelID().
szAudioFileName	The file to store audio to, e.g. C:\MyFiles\Conf.mp3.
uAFF	The audio format which should be used in the recorded file. The muxer will convert to this format.

See also: TT_SetUserMediaStorageDir(); TT_StartRecordingMuxedAudioFileEx(); TT_StartRecordingMuxedStreams(); TT_StopRecordingMuxedAudioFile()

◆ TT_StartRecordingMuxedAudioFileEx()

TEAMTALKDLL_API TTBOOL TT_StartRecordingMuxedAudioFileEx	(	IN TTInstance *	lpTTInstance,
		IN INT32	nChannelID,
		IN const TTCHAR *	szAudioFileName,
		IN AudioFileFormat	uAFF
	)

Store audio conversations from a specific channel into a single file.

To record audio outside the TTInstance's current channel use the TT_DoSubscribe() with the SUBSCRIBE_INTERCEPT_VOICE on all the user's in the channel.

Unlike TT_StartRecordingMuxedAudioFile() this function does not toggle the flag CLIENT_MUX_AUDIOFILE.

Use TT_StartRecordingMuxedAudioFile() to record conversations from many different channels with the same AudioCodec settings.

Only STREAMTYPE_VOICE is stored into the audio file, not STREAMTYPE_MEDIAFILE_AUDIO.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
nChannelID	The recording will contain the conversations from this channel ID.
szAudioFileName	The file to store audio to, e.g. C:\MyFiles\Conf.mp3.
uAFF	The audio format which should be used in the recorded file. The muxer will convert to this format.

See also: TT_StartRecordingMuxedAudioFile(); TT_StartRecordingMuxedStreams(); TT_StopRecordingMuxedAudioFileEx()

◆ TT_StartRecordingMuxedStreams()

TEAMTALKDLL_API TTBOOL TT_StartRecordingMuxedStreams	(	IN TTInstance *	lpTTInstance,
		IN StreamTypes	uStreamTypes,
		IN const AudioCodec *	lpAudioCodec,
		IN const TTCHAR *	szAudioFileName,
		IN AudioFileFormat	uAFF
	)

Mix multiple StreamTypes into a single audio file.

Both voice, media streams, etc. can be mixed together into a single file using this feature.

Streams that can be mixed into a single file are:

TT_StartRecordingMuxedAudioFile() is mutually exclusive with TT_StartRecordingMuxedStreams().

Use TT_StopRecordingMuxedAudioFile() to stop the recording.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
uStreamTypes	The StreamTypes to mix together. Streams that can be mixed into a single file are: STREAMTYPE_VOICE STREAMTYPE_MEDIAFILE_AUDIO STREAMTYPE_LOCALMEDIAPLAYBACK_AUDIO
lpAudioCodec	The reference codec for the recording. The recording will use the sample rate and number of channels specified by the AudioCodec.
szAudioFileName	The file to store audio to, e.g. C:\MyFiles\Conf.mp3.
uAFF	The audio format which should be used in the recorded file. The muxer will convert to this format.

See also: TT_StartRecordingMuxedAudioFile(); TT_StartRecordingMuxedAudioFileEx(); TT_StopRecordingMuxedAudioFileE()

◆ TT_StopRecordingMuxedAudioFile()

TEAMTALKDLL_API TTBOOL TT_StopRecordingMuxedAudioFile ( IN TTInstance * lpTTInstance )

Stop an active muxed audio recording.

A muxed audio recording started with TT_StartRecordingMuxedAudioFile() can be stopped using this function.

Calling TT_StopRecordingMuxedAudioFile() will clear the CLIENT_MUX_AUDIOFILE flag from TT_GetFlags().

Parameters

lpTTInstance Pointer to client instance created by TT_InitTeamTalk.

See also: TT_StartRecordingMuxedAudioFile()

◆ TT_StopRecordingMuxedAudioFileEx()

TEAMTALKDLL_API TTBOOL TT_StopRecordingMuxedAudioFileEx	(	IN TTInstance *	lpTTInstance,
		IN INT32	nChannelID
	)

Stop recording conversations from a channel to a single file.

Stop a recording initiated by TT_StartRecordingMuxedAudioFileEx().

See also: TT_StopRecordingMuxedAudioFile()

◆ TT_StartVideoCaptureTransmission()

TEAMTALKDLL_API TTBOOL TT_StartVideoCaptureTransmission	(	IN TTInstance *	lpTTInstance,
		IN const VideoCodec *	lpVideoCodec
	)

Start transmitting from video capture device.

The video capture device is initiated by calling TT_InitVideoCaptureDevice(). After joining a channel and calling this function the other users will see the video from the capture device.

Video capture data is transmitted with stream type STREAMTYPE_VIDEOCAPTURE and is subscribed/unsubscribed using SUBSCRIBE_VIDEOCAPTURE.

To stop transmitting call TT_StopVideoCaptureTransmission()

User rights required:

USERRIGHT_TRANSMIT_VIDEOCAPTURE.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
lpVideoCodec	The video codec settings to use for transmission.

See also: TT_StartStreamingMediaFileToChannel(); TT_EnableVoiceTransmission()

◆ TT_StopVideoCaptureTransmission()

TEAMTALKDLL_API TTBOOL TT_StopVideoCaptureTransmission ( IN TTInstance * lpTTInstance )

Stop transmitting from video capture device.

Parameters

lpTTInstance Pointer to client instance created by TT_InitTeamTalk.

See also: TT_StartVideoCaptureTransmission()

Typedefs

Enumerations

Functions

Detailed Description

Typedef Documentation

◆ StreamType

◆ StreamTypes

Enumeration Type Documentation

◆ StreamType

Function Documentation

◆ TT_InsertAudioBlock()

◆ TT_EnableVoiceTransmission()

◆ TT_EnableVoiceActivation()

◆ TT_SetVoiceActivationLevel()

◆ TT_GetVoiceActivationLevel()

◆ TT_SetVoiceActivationStopDelay()

◆ TT_GetVoiceActivationStopDelay()

◆ TT_StartRecordingMuxedAudioFile()

◆ TT_StartRecordingMuxedAudioFileEx()

◆ TT_StartRecordingMuxedStreams()

◆ TT_StopRecordingMuxedAudioFile()

◆ TT_StopRecordingMuxedAudioFileEx()

◆ TT_StartVideoCaptureTransmission()

◆ TT_StopVideoCaptureTransmission()