Support for the Bluetooth subband codec (SBC)

[Marcel Holtmann <marcel@holtmann.org>]

Hi guys,

besides the Bluetooth headset/handsfree support there is another type of
audio support. It is the high quality audio (A2DP) for headphones and so
on. To include a native support for these devices with every Bluetooth
adapter (for example the ones built into your notebook) it is necessary
to support the subband codec (SBC) from Philips. The codec description
is in the Advanced Audio Distribution Profile (A2DP).

I am not an audio expert and far away from doing any codec specific
things, but from my understanding the ALSA kernel part should be
extended with the SBC type for PCM devices and the library should know
how to convert any PCM data into the SBC format so we can use it inside
the kernel in a A2DP driver.

Any comments?

Regards

Marcel




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