IMX8MP Android not able to Record voice using BT

[shiva141]

Hi 

We are using IM8XMP Android 13 ;

We have added support for WIFI BT awcm276masur SDIOUART.

We are able to scan and pair BT device 

We are able to play sound and hear on BT headphones.

audio/rawWhen we try to record voice using recorder application we are not able to capture voice ; we have captured logcat during this activity

record was trying from audio codec CARD 1 instead of BT 

please share method to use Bluetooth microphone.

10-23 12:22:28.188 387 387 I BTAudioSessionAidl: UpdateSourceMetadata - SessionType=A2DP_SOFTWARE_ENCODING_DATAPATH,1 track(s)
10-23 12:22:28.188 387 2160 I BTAudioHalStream: out_write: state=STANDBY first time bytes=0
10-23 12:22:28.188 419 1961 W StagefrightRecorder: stop while neither recording nor paused
10-23 12:22:28.188 387 2160 I BTAudioHalDeviceProxyAIDL: Start: session_type=A2DP_SOFTWARE_ENCODING_DATAPATH, cookie=0x100, state=STANDBY, mono=false request
10-23 12:22:28.188 2000 2060 I btif_av : packages/modules/Bluetooth/system/btif/src/btif_av.cc:3283 btif_av_stream_started_ready: btif_av_stream_started_ready: Peer e4:41:22:88:a0:55 : state=2 flags=0x0(None) ready=0
10-23 12:22:28.188 2000 2060 I btif_av : packages/modules/Bluetooth/system/btif/src/btif_av.cc:3254 btif_av_stream_ready: btif_av_stream_ready: Peer e4:41:22:88:a0:55 : state=2, flags=0x0(None)
10-23 12:22:28.188 2000 2060 I btif_av : packages/modules/Bluetooth/system/btif/src/btif_av.cc:3169 btif_av_stream_start_with_latency: btif_av_stream_start_with_latency
10-23 12:22:28.188 2000 2060 I btif_av : packages/modules/Bluetooth/system/btif/src/btif_av.cc:3178 btif_av_stream_start_with_latency: peer_address=e4:41:22:88:a0:55 event=BTIF_AV_START_STREAM_REQ_EVT(0x1c) use_latency_mode=false
10-23 12:22:28.189 2000 2029 I BluetoothAdapterService: getActiveDevices: A2dp device: E4:41:22:88:A0:55
10-23 12:22:28.189 2000 2029 D A2dpService: getCodecStatus(E4:41:22:88:A0:55)
10-23 12:22:28.189 2000 2055 I btif_av : packages/modules/Bluetooth/system/btif/src/btif_av.cc:1931 ProcessEvent: virtual bool BtifAvStateMachine::StateOpened::ProcessEvent(uint32_t, void *): Peer e4:41:22:88:a0:55 : event=BTIF_AV_START_STREAM_REQ_EVT(0x1c) flags=0x0(None)
10-23 12:22:28.189 2000 2055 I btif_av : packages/modules/Bluetooth/system/btif/src/btif_av.cc:1936 ProcessEvent: Stream use_latency_mode=false
10-23 12:22:28.189 2000 2055 I bt_bta_av: packages/modules/Bluetooth/system/bta/av/bta_av_api.cc:222 BTA_AvStart: Starting audio/video stream data transfer bta_handle:65, use_latency_mode:false
10-23 12:22:28.189 2000 2055 I bt_bta_av: packages/modules/Bluetooth/system/bta/av/bta_av_aact.cc:1806 bta_av_do_start: A2dp stream start peer:xx:xx:xx:xx:a0:55 sco_occupied:false av_role:0x0 started:false wait:0x0
10-23 12:22:28.189 2000 2055 I bt_btm_pm: packages/modules/Bluetooth/system/stack/acl/btm_pm.cc:277 BTM_SetPowerMode: Setting power mode for peer:xx:xx:xx:xx:a0:55 current_mode:immediate:sniff[2] new_mode:forced:active[0]
10-23 12:22:28.189 2000 2055 I bt_btm_pm: packages/modules/Bluetooth/system/stack/acl/btm_pm.cc:583 btm_pm_snd_md_req: Switching from immediate:sniff[0x02] to immediate:active[0x00]
10-23 12:22:28.190 2000 2055 I bt_l2cap: packages/modules/Bluetooth/system/stack/l2cap/l2c_api.cc:1054 L2CA_UseLatencyMode: BDA: e4:41:22:88:a0:55, use_latency_mode: false
10-23 12:22:28.190 2000 2055 I bt_bta_av: packages/modules/Bluetooth/system/bta/av/bta_av_aact.cc:1872 bta_av_do_start: bta_av_do_start: peer e4:41:22:88:a0:55 start requested: sco_occupied:false role:0x10 started:false wait:0x0
10-23 12:22:28.190 2000 2060 I btif_av : packages/modules/Bluetooth/system/btif/src/btif_av.cc:3408 btif_av_get_peer_sep: Peer e4:41:22:88:a0:55 SEP is Sink (1)
10-23 12:22:28.190 2000 2060 I bt_stack: [INFO:a2dp_encoding_aidl.cc(98)] StartRequest: accepted
10-23 12:22:28.192 2000 2055 I bt_btm_pm: packages/modules/Bluetooth/system/stack/acl/btm_pm.cc:697 btm_pm_proc_cmd_status: Clearing pending power mode link state:immediate:pending
10-23 12:22:28.192 2000 2055 E bluetooth: packages/modules/Bluetooth/system/bta/dm/bta_dm_pm.cc:1016 bta_dm_pm_btm_status: Received unknown power mode status event:5
10-23 12:22:28.201 419 1961 D MPEG4Writer: PreAllocation enabled
10-23 12:22:28.206 387 387 I audio_hw_primary: refine_input_parameters: enter: sample_rate(8000) channel_mask(0x10) format(0x1)
10-23 12:22:28.206 387 387 I audio_hw_primary: adev_open_input_stream: enter: devices(0x80000004) flags(0), address(bottom)
10-23 12:22:28.206 387 387 W audio_hw_primary: In channels 1, rate 8000, devices 0x80000004
10-23 12:22:28.207 387 387 I audio_hw_primary: refine_input_parameters: enter: sample_rate(8000) channel_mask(0x10) format(0x1)
10-23 12:22:28.207 387 387 W audio_hw_primary: get_input_buffer_size size = 48, channel_count = 1
10-23 12:22:28.208 387 387 I audio_hw_primary: refine_input_parameters: enter: sample_rate(8000) channel_mask(0x10) format(0x1)
10-23 12:22:28.208 387 387 W audio_hw_primary: get_input_buffer_size size = 48, channel_count = 1
10-23 12:22:28.209 415 2573 I AudioFlinger: AudioFlinger's thread 0xb400007910402bb0 tid=2573 ready to run
10-23 12:22:28.212 419 1961 W AudioRecord: createRecord_l(34): Server adjusted notificationFrames from 1024 to 160 for frameCount 2048
10-23 12:22:28.212 415 520 W AudioFlinger: acquireAudioSessionId() unknown client 2498 for session 265
10-23 12:22:28.213 419 1961 D MediaCodecList: codecHandlesFormat: no format, so no extra checks
10-23 12:22:28.214 419 2574 D CCodec : allocate(c2.android.amrnb.encoder)


We see Codec being used instead of BT 

10-23 12:22:28.230 419 2574 D CCodec : encoding statistics level = 0
10-23 12:22:28.230 419 2574 D CCodec : setup formats input: AMessage(what = 0x00000000) = {
10-23 12:22:28.230 419 2574 D CCodec : int32_t channel-count = 1
10-23 12:22:28.230 419 2574 D CCodec : int32_t max-input-size = 8192
10-23 12:22:28.230 419 2574 D CCodec : string mime = "audio/raw"
10-23 12:22:28.230 419 2574 D CCodec : int32_t sample-rate = 8000
10-23 12:22:28.230 419 2574 D CCodec : int32_t android._config-pcm-encoding = 2
10-23 12:22:28.230 419 2574 D CCodec : }
10-23 12:22:28.230 419 2574 D CCodec : setup formats output: AMessage(what = 0x00000000) = {
10-23 12:22:28.230 419 2574 D CCodec : int32_t bitrate = 12200
10-23 12:22:28.230 419 2574 D CCodec : int32_t channel-count = 1
10-23 12:22:28.230 419 2574 D CCodec : int32_t max-bitrate = 12200
10-23 12:22:28.230 419 2574 D CCodec : string mime = "audio/3gpp"
10-23 12:22:28.230 419 2574 D CCodec : int32_t sample-rate = 8000
10-23 12:22:28.230 419 2574 D CCodec : }

IMX8MPLUS #android

[Bio_TICFSL]

Hello,

It looks like this bluetooth don't have the original source code or driver for usage please look at the bluetooth code of android and modify to your desire input of microphone.

Regards