MediaSourceType
Media source type.
Enumerator
- AUDIO_PLAYOUT_SOURCE
 - 0: Audio playback device.
 - AUDIO_RECORDING_SOURCE
 - 1: Audio capturing device.
 - PRIMARY_CAMERA_SOURCE
 - 2: The primary camera.
 - SECONDARY_CAMERA_SOURCE
 - 3: A secondary camera.
 - CUSTOM_VIDEO_SOURCE
 - 6: Custom video source.
 - SPEECH_DRIVEN_VIDEO_SOURCE
 - 13: Video processed by the speech driven extension.
 - UNKNOWN_MEDIA_SOURCE
 - 100: Unknown media source.