The audio agent gets or provides data in the format requested between host
and chipset.
The HSP and HFP profile request PCM data to be sent to the chipset which
will encode/decode them in CVSD format.
This audio agent format may be re-used later for another air codec hw
encoded.
So, rename the audio agent to be more explicit.
Use codec methods. Init codec at start.
Remove rate match until we actually implement this
Add some buffering of packets before we hand them out.
Always simply fill a buffer and hand it out.
don't emit signals when we are following another driver.
Acquire transport as soon as it goes to PENDING.
Make the list of supported codecs available.
Register all supported codecs endpoints
Find the codec from the endpoint name
Put the codec on the transport for the sink to find.
Release transport when endpoint connection property is updated to false.
This also checks if the transport is already created when receiving
endpoint properties update to prevent multiple transport creation.
Continue processing the input data until we can't send anymore. When
we are following another driver, we need to process each buffer in
the cycle completely or we will start lagging behind.
The ConnectAudio method triggers Introspect and NewConnection calls from
hsphfpd to the backend, which will set the fd to use for the SCO data.
This imply to run the DBus loop while waiting for ConnectAudio reply to be
able to reply to those method calls.
MTU is hard-coded to 48. Using MTU from hsphfpd may prevent correct
sound operations.
Volume management is not yet implemented.
As hsphfpd is a prototype and its API subject to change, this backend is
disable by default.
This skeleton connects to hsphfpd daemon and list the managed devices.
This tool detects and fixes common English spelling mistakes, with
generally very few mistakes.
Here is the command I used to generate this commit. There were a few
changes that had to be done manually, and of course adding the ignore
file:
```shell
codespell -I .codespell-ignore -x .codespell-ignore -w
```
I didn’t add it to the CI, but this would be a good place for it.
Use the same code to enumerate the profiles and the current profile,
this makes sure we have all info in the Profile param as well and
don't need to do a lookup in the EnumProfile.
Filter callback should return DBUS_HANDLER_RESULT_HANDLED only when signals
was handled, otherwise it prevents signals to be seen by other objects.
Also fix a Typo.
oFono's CardAdded signal from can occur after BlueZ's ServicesResolved
signal. In this case the device is created without SCO nodes.
This is fixed by not enforcing device creation on ServicesResolved signal.
It seems that some BT adapters don't return correct SCO MTU, see
https://marc.info/?t=148586768600002&r=1&w=2
Do not try to autodetect the MTU and use a fix MTU size of 48 bytes.
sbc_encode() can only process data with at least this->codesize bytes.
When encode_buffer() is called with less then codesize bytes, accumulate
those bytes in a temporary buffer up to codesize length, then SBC encode
them.
Maximum size for SBC buffer is (subbands * blocks * channels * 2) with max
subbands = 8, max blocks = 16, max channels = 2, i.e. 512.
Fixes!277
