[AN-765] Support for runtime Audio Usage Switching for HiFi Audio Playback in Android #63
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…ult of bufferSizeFactor = 1.0 while switching b/w mono and stereo
…safe method initPlayoutThreadSafe which does not have any thread checking logic
…safe method initPlayoutThreadSafe which does not have any thread checking logic
…restarted with the new configuration.
…ioAttribute to be updated.
…io Attribute when it is changed from the app
PratimMallick
changed the title
aleksandar-apostolov
approved these changes
Oct 29, 2025
PratimMallick
changed the title
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Summary
Enables switching audio usage (voice vs media) at runtime on Android to support HiFi audio without reinitializing the entire AudioDeviceModule.
Changes
1. WebRtcAudioTrack.java
Add updateAudioTrackUsage() to update AudioAttributes at runtime
Cache sample rate, channels, and buffer size to support reinitialization
Introduce
checkThreadboolean toinitPlayout,startPlayout, andstopPlayoutmethods so they can run from app threadsAutomatically stop/restart playout during updates
2. JavaAudioDeviceModule.java
Expose updateAudioTrackUsage() that delegates to WebRtcAudioTrack
3. audio_track_jni.cc
Update JNI to pass checkThread=true for native path calls
Use Case
Support dynamic switching between voice communication (USAGE_VOICE_COMMUNICATION) and media playback (USAGE_MEDIA) for HiFi audio. The ADM stays stereo while only AudioAttributes change.
Behavior
If playout is active, it stops and restarts with the new attributes. No reinitialization of the ADM is required.