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      • 개요
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RTC Engine
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ITXAudioEffectManager

Copyright (c) 2021 Tencent. All rights reserved.

Module: management class for background music, short audio effects, and voice effects

Description: sets background music, short audio effects, and voice effects

ITXAudioEffectManager

ITXMusicPreloadObserver

FuncList
DESC
Background music preload progress
Background music preload error

ITXMusicPlayObserver

FuncList
DESC
Background music started.
Playback progress of background music
Background music ended

ITXAudioEffectManager

FuncList
DESC
Enabling in-ear monitoring
Setting in-ear monitoring volume
Setting voice reverb effects
Setting voice changing effects
Setting speech volume
Setting speech pitch
Setting the background music callback
Starting background music
Stopping background music
Pausing background music
Resuming background music
Setting the local and remote playback volume of background music
Setting the remote playback volume of a specific music track
Setting the local playback volume of a specific music track
Adjusting the pitch of background music
Changing the speed of background music
Getting the playback progress (ms) of background music
Getting the total length (ms) of background music
Setting the playback progress (ms) of background music
Adjust the speed change effect of the scratch disc
Setting music preload callback
Preload background music
Get the number of tracks of background music
Specify the playback track of background music

StructType

FuncList
DESC
Background music playback information

EnumType

EnumType
DESC
Reverb effects
Voice changing effects

onLoadProgress

onLoadProgress
void onLoadProgress
(int id

int progress)

Background music preload progress

onLoadError

onLoadError
void onLoadError
(int id

int errorCode)

Background music preload error

Param
DESC
errorCode
-4001: Failed to open the file, such as invalid data found when processing input, ffmpeg protocol not found, etc; -4002: Decoding failure, such as audio file corruption, inaccessible network audio file server, etc; -4003: The number of preloads exceeded the limit,Please call stopPlayMusic first to release the useless preload;-4005: Invalid path, Please check whether the path you passed points to a legal music file;-4006: Invalid URL, Please use a browser to check whether the URL address you passed in can download the desired music file;-4007: No audio stream, Please confirm whether the file you passed is a legal audio file and whether the file is damaged;-4008: Unsupported format, Please confirm whether the file format you passed is a supported file format. The mobile version supports [mp3, aac, m4a, wav, ogg, mp4, mkv], and the desktop version supports [mp3, aac, m4a, wav, mp4, mkv].

onStart

onStart
void onStart
(int id

int errCode)

Background music started.

Called after the background music starts.
Param
DESC
errCode
0: Start playing successfully; -4001: Failed to open the file, such as invalid data found when processing input, ffmpeg protocol not found, etc; -4005: Invalid path, Please check whether the path you passed points to a legal music file;-4006: Invalid URL, Please use a browser to check whether the URL address you passed in can download the desired music file;-4007: No audio stream, Please confirm whether the file you passed is a legal audio file and whether the file is damaged;-4008: Unsupported format, Please confirm whether the file format you passed is a supported file format. The mobile version supports [mp3, aac, m4a, wav, ogg, mp4, mkv], and the desktop version supports [mp3, aac, m4a, wav, mp4, mkv].
id
music ID.

onPlayProgress

onPlayProgress
void onPlayProgress
(int id

long curPtsMS

long durationMS)

Playback progress of background music

onComplete

onComplete
void onComplete
(int id

int errCode)

Background music ended

Called when the background music playback ends or an error occurs.
Param
DESC
errCode
0: End of play; -4002: Decoding failure, such as audio file corruption, inaccessible network audio file server, etc.
id
music ID.

enableVoiceEarMonitor

enableVoiceEarMonitor
void enableVoiceEarMonitor
(bool enable)

Enabling in-ear monitoring

After enabling in-ear monitoring, anchors can hear in earphones their own voice captured by the mic. This is designed for singing scenarios.

In-ear monitoring cannot be enabled for Bluetooth earphones. This is because Bluetooth earphones have high latency. Please ask anchors to use wired earphones via a UI reminder.
Given that not all phones deliver excellent in-ear monitoring effects, we have blocked this feature on some phones.
Param
DESC
enable
true: enable; false : disable
Note
In-ear monitoring can be enabled only when earphones are used. Please remind anchors to use wired earphones.

setVoiceEarMonitorVolume

setVoiceEarMonitorVolume
void setVoiceEarMonitorVolume
(int volume)

Setting in-ear monitoring volume

This API is used to set the volume of in-ear monitoring.
Param
DESC
volume
Volume. Value range: 0-100; default: 100
Note
If 100 is still not loud enough for you, you can set the volume to up to 150, but there may be side effects.

setVoiceReverbType

setVoiceReverbType
void setVoiceReverbType
(TXVoiceReverbType type)

Setting voice reverb effects

This API is used to set reverb effects for human voice. For the effects supported, please see TXVoiceReverbType.
Note
Effects become invalid after room exit. If you want to use the same effect after you enter the room again, you need to set the effect again using this API.

setVoiceChangerType

setVoiceChangerType
void setVoiceChangerType
(TXVoiceChangerType type)

Setting voice changing effects

This API is used to set voice changing effects. For the effects supported, please see TXVoiceChangeType.
Note
Effects become invalid after room exit. If you want to use the same effect after you enter the room again, you need to set the effect again using this API.

setVoiceCaptureVolume

setVoiceCaptureVolume
void setVoiceCaptureVolume
(int volume)

Setting speech volume

This API is used to set the volume of speech. It is often used together with the music volume setting API setAllMusicVolume to balance between the volume of music and speech.
Param
DESC
volume
Volume. Value range: 0-100; default: 100
Note
If 100 is still not loud enough for you, you can set the volume to up to 150, but there may be side effects.

setVoicePitch

setVoicePitch
void setVoicePitch
(double pitch)

Setting speech pitch

This API is used to set the pitch of speech.
Param
DESC
pitch
Ptich,Value range: -1.0f~1.0f; default: 0.0f。

setMusicObserver

setMusicObserver
void setMusicObserver
(int musicId

ITXMusicPlayObserver* observer)

Setting the background music callback

Before playing background music, please use this API to set the music callback, which can inform you of the playback progress.
Param
DESC
musicId
Music ID
observer
For more information, please see the APIs defined in ITXMusicPlayObserver .
Note
1. If the ID does not need to be used, the observer can be set to NULL to release it completely.

startPlayMusic

startPlayMusic
void startPlayMusic
(AudioMusicParam musicParam)

Starting background music

You must assign an ID to each music track so that you can start, stop, or set the volume of music tracks by ID.
Param
DESC
musicParam
Music parameter
Note
1. If you play the same music track multiple times, please use the same ID instead of a separate ID for each playback.
2. If you want to play different music tracks at the same time, use different IDs for them.
3. If you use the same ID to play a music track different from the current one, the SDK will stop the current one before playing the new one.

stopPlayMusic

stopPlayMusic
void stopPlayMusic
(int id)

Stopping background music

Param
DESC
id
Music ID

pausePlayMusic

pausePlayMusic
void pausePlayMusic
(int id)

Pausing background music

Param
DESC
id
Music ID

resumePlayMusic

resumePlayMusic
void resumePlayMusic
(int id)

Resuming background music

Param
DESC
id
Music ID

setAllMusicVolume

setAllMusicVolume
void setAllMusicVolume
(int volume)

Setting the local and remote playback volume of background music

This API is used to set the local and remote playback volume of background music.
Local volume: the volume of music heard by anchors
Remote volume: the volume of music heard by audience
Param
DESC
volume
Volume. Value range: 0-100; default: 60
Note
If 100 is still not loud enough for you, you can set the volume to up to 150, but there may be side effects.

setMusicPublishVolume

setMusicPublishVolume
void setMusicPublishVolume
(int id

int volume)

Setting the remote playback volume of a specific music track

This API is used to control the remote playback volume (the volume heard by audience) of a specific music track.
Param
DESC
id
Music ID
volume
Volume. Value range: 0-100; default: 60
Note
If 100 is still not loud enough for you, you can set the volume to up to 150, but there may be side effects.

setMusicPlayoutVolume

setMusicPlayoutVolume
void setMusicPlayoutVolume
(int id

int volume)

Setting the local playback volume of a specific music track

This API is used to control the local playback volume (the volume heard by anchors) of a specific music track.
Param
DESC
id
Music ID
volume
Volume. Value range: 0-100. default: 60
Note
If 100 is still not loud enough for you, you can set the volume to up to 150, but there may be side effects.

setMusicPitch

setMusicPitch
void setMusicPitch
(int id

float pitch)

Adjusting the pitch of background music

Param
DESC
id
Music ID
pitch
Pitch. Value range: floating point numbers in the range of [-1, 1]; default: 0.0f

setMusicSpeedRate

setMusicSpeedRate
void setMusicSpeedRate
(int id

float speedRate)

Changing the speed of background music

Param
DESC
id
Music ID
speedRate
Music speed. Value range: floating point numbers in the range of [0.5, 2]; default: 1.0f

getMusicCurrentPosInMS

getMusicCurrentPosInMS
long getMusicCurrentPosInMS
(int id)

Getting the playback progress (ms) of background music

Param
DESC
id
Music ID

Return Desc:

The milliseconds that have passed since playback started. -1 indicates failure to get the the playback progress.

getMusicDurationInMS

getMusicDurationInMS
long getMusicDurationInMS
(char* path)

Getting the total length (ms) of background music

Param
DESC
path
Path of the music file.

Return Desc:

The length of the specified music file is returned. -1 indicates failure to get the length.

seekMusicToPosInTime

seekMusicToPosInTime
void seekMusicToPosInTime
(int id

int pts)

Setting the playback progress (ms) of background music

Param
DESC
id
Music ID
pts
Unit: millisecond
Note
Do not call this API frequently as the music file may be read and written to each time the API is called, which can be time-consuming.
Wait till users finish dragging the progress bar before you call this API.
The progress bar controller on the UI tends to update the progress at a high frequency as users drag the progress bar. This will result in poor user experience unless you limit the frequency.

setMusicScratchSpeedRate

setMusicScratchSpeedRate
void setMusicScratchSpeedRate
(int id

float scratchSpeedRate)

Adjust the speed change effect of the scratch disc

Param
DESC
id
Music ID
scratchSpeedRate
Scratch disc speed, the default value is 1.0f, the range is: a floating point number between [-12.0 ~ 12.0], the positive/negative speed value indicates the direction is positive/negative, and the absolute value indicates the speed.
Note
Precondition preloadMusic succeeds.

setPreloadObserver

setPreloadObserver
void setPreloadObserver
(ITXMusicPreloadObserver* observer)

Setting music preload callback

Before preload music, please use this API to set the preload callback, which can inform you of the preload status.
Param
DESC
observer
For more information, please see the APIs defined in ITXMusicPreloadObserver .

preloadMusic

preloadMusic
void preloadMusic
(AudioMusicParam preloadParam)

Preload background music

You must assign an ID to each music track so that you can start, stop, or set the volume of music tracks by ID.
Param
DESC
musicParam
Music parameter
Note
1. Preload supports up to 2 preloads with different IDs at the same time, and the preload time does not exceed 10 minutes,you need to stopPlayMusic after use, otherwise the memory will not be released.
2. If the music corresponding to the ID is being played, the preloading fails, and stopPlayMusic must be called first.
3. When the musicParam passed to startPlayMusic is exactly the same, preloading works.

getMusicTrackCount

getMusicTrackCount
long getMusicTrackCount
(int id)

Get the number of tracks of background music

Param
DESC
id
Music ID

setMusicTrack

setMusicTrack
void setMusicTrack
(int id

int trackIndex)

Specify the playback track of background music

Param
DESC
id
Music ID
index
Specify which track to play (the first track is played by default). Value range [0, total number of tracks).
Note
The total number of tracks can be obtained through the getMusicTrackCount interface.

TXVoiceReverbType

TXVoiceReverbType

Reverb effects

Reverb effects can be applied to human voice. Based on acoustic algorithms, they can mimic voice in different environments. The following effects are supported currently:
0: original; 1: karaoke; 2: room; 3: hall; 4: low and deep; 5: resonant; 6: metal; 7: husky; 8: ethereal; 9: studio; 10: melodious; 11: studio2;
Enum
Value
DESC
TXLiveVoiceReverbType_0
0
disable
TXLiveVoiceReverbType_1
1
KTV
TXLiveVoiceReverbType_2
2
small room
TXLiveVoiceReverbType_3
3
great hall
TXLiveVoiceReverbType_4
4
deep voice
TXLiveVoiceReverbType_5
5
loud voice
TXLiveVoiceReverbType_6
6
metallic sound
TXLiveVoiceReverbType_7
7
magnetic sound
TXLiveVoiceReverbType_8
8
ethereal
TXLiveVoiceReverbType_9
9
studio
TXLiveVoiceReverbType_10
10
melodious
TXLiveVoiceReverbType_11
11
studio2

TXVoiceChangeType

TXVoiceChangeType

Voice changing effects

Voice changing effects can be applied to human voice. Based on acoustic algorithms, they change the tone of voice. The following effects are supported currently:
0: original; 1: child; 2: little girl; 3: middle-aged man; 4: metal; 5: nasal; 6: foreign accent; 7: trapped beast; 8: otaku; 9: electric; 10: robot; 11: ethereal
Enum
Value
DESC
TXVoiceChangerType_0
0
disable
TXVoiceChangerType_1
1
naughty kid
TXVoiceChangerType_2
2
Lolita
TXVoiceChangerType_3
3
uncle
TXVoiceChangerType_4
4
heavy metal
TXVoiceChangerType_5
5
catch cold
TXVoiceChangerType_6
6
foreign accent
TXVoiceChangerType_7
7
caged animal trapped beast
TXVoiceChangerType_8
8
indoorsman
TXVoiceChangerType_9
9
strong current
TXVoiceChangerType_10
10
heavy machinery
TXVoiceChangerType_11
11
intangible

TXAudioMusicParam

TXAudioMusicParam

Background music playback information

The information, including playback ID, file path, and loop times, is passed in the startPlayMusic API.
1. If you play the same music track multiple times, please use the same ID instead of a separate ID for each playback.
2. If you want to play different music tracks at the same time, use different IDs for them.
3. If you use the same ID to play a music track different from the current one, the SDK will stop the current one before playing the new one.
EnumType
DESC
endTimeMS
Field description: the point in time in milliseconds for ending music playback. 0 indicates that playback continues till the end of the music track.
id
Field description: music ID
Note
the SDK supports playing multiple music tracks. IDs are used to distinguish different music tracks and control their start, end, volume, etc.
isShortFile
Field description: whether the music played is a short music track
Valid values: true : short music track that needs to be looped; false (default): normal-length music track
loopCount
Field description: number of times the music track is looped
Valid values: 0 or any positive integer. 0 (default) indicates that the music is played once, 1 twice, and so on.
path
Field description: absolute path of the music file or url.the mp3,aac,m4a,wav supported.
publish
Field description: whether to send the music to remote users
Valid values: true : remote users can hear the music played locally; false (default): only the local user can hear the music.
startTimeMS
Field description: the point in time in milliseconds for starting music playback