[pulseaudio-discuss] HFP bluetooth profile isn't working

[Eytan Naim]

Hi,

I'm trying to enable HFP on pulseaudio 6.0 using oFono and bluez 5 on a new embedded platform which doesn't support alsa yet.
In order to confirm that audio is 'played' I record it using parecord tool. - This method worked just fine when enabled a2dp a short time ago.

After executing oFono & pulseaudio, a call is answered on the remote device- It is seemed that the relevant profile is chosen on pulseaudio, and parecord fails to record.

When executing 'pacmd stat' it seems that
Memory blocks allocated during the whole lifetime: 192, size: 699.9 KiB.
Is constant while pulseaudio prints to terminal the following message along the call with relatively fixed intervals:

( 482.106|   0.013) D: [pulseaudio][modules/module-loopback.c:201 adjust_rates()] Should buffer 96 bytes, buffered at minimum 128 bytes
( 482.118|   0.012) D: [pulseaudio][modules/module-loopback.c:226 adjust_rates()] [bluez_sink.98_D6_F7_34_98_E8] Updated sampling rate to 8000 Hz.
( 482.132|   0.013) D: [pulseaudio][modules/module-loopback.c:197 adjust_rates()] Loopback overall latency is 610.13 ms + 0.00 ms + 25.00 ms = 635.13 ms
( 482.146|   0.014) D: [pulseaudio][modules/module-loopback.c:201 adjust_rates()] Should buffer 96 bytes, buffered at minimum 0 bytes
( 482.159|   0.012) D: [pulseaudio][modules/module-loopback.c:226 adjust_rates()] [bluez_sink.98_D6_F7_34_98_E8] Updated sampling rate to 8000 Hz.
( 492.134|   9.975) D: [pulseaudio][modules/module-loopback.c:197 adjust_rates()] Loopback overall latency is 610.13 ms + 8.00 ms + 0.00 ms = 618.13 ms
( 492.148|   0.013) D: [pulseaudio][modules/module-loopback.c:201 adjust_rates()] Should buffer 96 bytes, buffered at minimum 128 bytes
( 492.161|   0.012) D: [pulseaudio][modules/module-loopback.c:226 adjust_rates()] [bluez_sink.98_D6_F7_34_98_E8] Updated sampling rate to 8000 Hz.
( 492.175|   0.013) D: [pulseaudio][modules/module-loopback.c:197 adjust_rates()] Loopback overall latency is 610.13 ms + 0.00 ms + 25.00 ms = 635.13 ms
( 492.189|   0.014) D: [pulseaudio][modules/module-loopback.c:201 adjust_rates()] Should buffer 96 bytes, buffered at minimum 0 bytes
( 492.201|   0.012) D: [pulseaudio][modules/module-loopback.c:226 adjust_rates()] [bluez_sink.98_D6_F7_34_98_E8] Updated sampling rate to 8000 Hz.
( 502.176|   9.975) D: [pulseaudio][modules/module-loopback.c:197 adjust_rates()] Loopback overall latency is 610.13 ms + 8.00 ms + 0.00 ms = 618.13 ms
( 502.190|   0.013) D: [pulseaudio][modules/module-loopback.c:201 adjust_rates()] Should buffer 96 bytes, buffered at minimum 128 bytes
( 502.202|   0.012) D: [pulseaudio][modules/module-loopback.c:226 adjust_rates()] [bluez_sink.98_D6_F7_34_98_E8] Updated sampling rate to 8000 Hz.
( 502.216|   0.013) D: [pulseaudio][modules/module-loopback.c:197 adjust_rates()] Loopback overall latency is 610.13 ms + 0.00 ms + 25.00 ms = 635.13 ms

Please note:
I'm now familer with oFono at all - I simply run it as ofonod -d
Pacmd list output is attached while call is still ongoing. - there are 2 sources loaded and one sink.

Also, could someone explain why are there two source available? Nexus 4 and Nexus 4 monitor?
How can I confirm that the audio arrives at pulseaudio? By the log I would assume that the answer is positive, but according to 'pacmd stat' the value it seems not.

Thanks for your help,
Eytan.
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