- Create a sample app to record VOICE_CALL audio
- Below Android 6: Worked fine on phones that supported VOICE_CALL
- With Android 6: Getting "Thread requires android.permission.CAPTURE_AUDIO_OUTPUT" from AudioFlinger
- VOICE_CALL audio source was tied to RECORD_AUDIO permission. AudioFlinger should not throw permission error as there is no notification or documentation about this change
- This behavior can be observed on all Android 6 devices

Issue seem to be same with
VOICE_UPLINK
VOICE_DOWNLINK

But, does not affect
VOICE_COMMUNICATION
VOICE_RECOGNITION

Here is the log

4-12 22:46:25.855 5651-5651/? I/InCall: InCallUISystemDB - getSuppService: 0
04-12 22:46:25.855 5651-5651/? I/InCall: InCallUISystemDB - getTtySetting, setting: 0
04-12 22:46:25.865 550-550/CallRecorderService: mRecorder starting
04-12 22:46:25.865 5651-5651/? I/InCall: SecVoiceCallCardFragment - - needToShowMenu
04-12 22:46:25.865 5651-5651/? I/InCall: SecVoiceCallCardFragment - - showMenu: false
04-12 22:46:25.865 3158-15622/? I/APM::AudioPolicyManager: getInputForAttr() source 4, samplingRate 8000, format 1, channelMask 10,session 838, flags 0
04-12 22:46:25.865 3158-15622/? V/audio_hw_primary: adev_open_input_stream: request sample_rate:8000
04-12 22:46:25.865 3158-15622/? V/audio_hw_primary: in->requested_rate:8000, pcm_config_in.rate:48000 in->config.channels=2
04-12 22:46:25.865 3158-15622/? D/audio_hw_primary: adev_open_input_stream: call echoReference_init(12)
04-12 22:46:25.875 3158-15622/? V/echo_reference_processing: echoReference_init +
04-12 22:46:25.875 3158-15622/? I/audio_hw_primary: adev_open_input_stream: input is null, set new input stream
04-12 22:46:25.875 3158-5815/? I/AudioFlinger: AudioFlinger's thread 0xe9b80000 ready to run
04-12 22:46:25.885 3158-15622/? W/ServiceManager: Permission failure: android.permission.CAPTURE_AUDIO_OUTPUT from uid=10209 pid=550
04-12 22:46:25.885 3158-15622/? D/PermissionCache: checking android.permission.CAPTURE_AUDIO_OUTPUT for uid=10209 => denied (666 us)

[ 04-12 22:46:25.895 3158:15622 E/ ]
Request requires android.permission.CAPTURE_AUDIO_OUTPUT
04-12 22:46:25.895 3158-15622/? E/AudioPolicyIntefaceImpl: getInputForAttr() permission denied: capture not allowed
04-12 22:46:25.895 3158-15622/? V/audio_hw_primary: stop_voice_note_recording
04-12 22:46:25.895 3158-15622/? E/audio_hw_primary: adev_close_input_stream, set jack_in to null
04-12 22:46:25.905 3158-15622/? E/AudioRecord: Could not get audio input for record source 4, sample rate 8000, format 1, channel mask 0x10, session 838, flags 0
04-12 22:46:25.905 3158-15622/? E/StagefrightRecorder: audio source is not initialized
04-12 22:46:25.905 550-550/MediaRecorder: start failed: -2147483648

P3	Android is not open Bluetooth 4.0 for developers “ issue 36949180 ”	hb...@ #4
P3	Request: never block, ban, restrict, or harm call-recording apps “ https://issuetracker.google.com/112602629 ”	bc...@ #16

Issue 37094464

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