Third party app audio issue while app with iosrtc is running in the background

[vahvarh]

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Please use Community Forum for general technical discussions and questions.

• I have used Google with the error message or bug in association with the library and Cordova words to make sure the issue I'm reporting is only related to iOSRTC.
• I have provided steps to reproduce (e.g. using sample app code https://github.com/cordova-rtc/cordova-plugin-iosrtc-sample or updated extra/renderer-and-libwebrtc-tests.js file).
• I have provided versions of third party library name, IOS, Xcode and plugin version and adapter.js version if used.

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Versions affected

• Cordova version (e.g 7.1.0): 10.0.0 (latest)
• Cordova iOS version (e.g 5.1.0): 6.1.0 (latest)
• Plugin version (e.g 6.0.12): latest and git/master
• iOS version (e.g 10.2): 11+
• Xcode version (e.g 11.1 - 11A1027): 13.0
• WebRTC-adapter version (e.g. 7.4.0): latest
• WebRTC Framework version (e.g. JSSip 3.1.2): latest

Description

If background music plays (say apple music) and I start application (not even doing any API calls at all), music either stops (if cordova-plugin-background-mode is installed) or gets very loud and crappy (if no cordova-plugin-background-mode is installed).

Steps to reproduce

Music stop:

1. Connect bluetooth or wired earphones
2. Install cordova-plugin-iosrtc-sample
3. delete or comment out scripts from www/index.html (src="js/common.js" and src="js/index-local.js")
4. compile
5. start music in player
6. start application

Music gets loud and crappy:

1. Connect bluetooth or wired earphones
2. Install cordova-plugin-iosrtc-sample
3. delete or comment out scripts from www/index.html (src="js/common.js" and src="js/index-local.js")
4. cordova plugin remove cordova-plugin-background-mode
5. compile
6. start music in player
7. start application

Expected results

Music continues to play with same volume and quality (since no API calls done yet)

Actual results

Music stops or gets loud and crappy

[hthetiot]

try:

 <preference name="MANUAL_INIT_AUDIO_DEVICE" default="TRUE"/>

See #654 (comment)

[hthetiot]

See also #654 (comment) (next comment after the one linked above)

[hthetiot]

Note: that ios shitty shared audio managment not cordova-rtc, but links above should provide workarround.
The source code that may need improvment is here: https://github.com/cordova-rtc/cordova-plugin-iosrtc/blob/master/src/PluginRTCAudioController.swift

[hthetiot]

Changed incorrect issue title "Background music issue when iosrtc even not started" cause iosrtc is started and that not really Background music but any sound from external app.

[vahvarh]

Music gets loud and crappy:

1. Connect bluetooth or wired earphones
2. Install cordova-plugin-iosrtc-sample
3. delete or comment out scripts from www/index.html (src="js/common.js" and src="js/index-local.js")
4. cordova plugin remove cordova-plugin-background-mode
5. set in config.xml: variable name="MANUAL_INIT_AUDIO_DEVICE" value="TRUE"
6. compile
7. start music in player
8. start application

Music gets loud and crappy, then music stops, plays ding and does not continue:

1. Connect bluetooth or wired earphones
2. Install cordova-plugin-iosrtc-sample
3. delete or comment out scripts from www/index.html (src="js/common.js" and src="js/index-local.js")
4. cordova plugin remove cordova-plugin-background-mode
5. set in config.xml: variable name="MANUAL_INIT_AUDIO_DEVICE" value="TRUE"
6. Add to index.html script: var hack=new Audio('ding.mp3');hack.play();
7. compile
8. start music in player
9. start application

[hthetiot]

Thank for testing existing workaround.
Unfortunately I cannot help you more than that only solution now is to tinker with AudioController implementation.

Note: did you cordova prepare after changing "MANUAL_INIT_AUDIO_DEVICE" because if it's false it's not supposed to do anything with audio.