What is the format of the audio stream written to the ringbuf_i2s ?

GrayEight
Posts: 3
Joined: Mon Aug 19, 2019 8:22 pm

What is the format of the audio stream written to the ringbuf_i2s ?

Postby GrayEight » Thu Aug 22, 2019 9:04 am

Hello,

The audio Data-Stream from the phone is written to the RingBuffer ringbuf_i2s of type Byte buffer (defined in the bt_app_core.c file) by the write_ringbuf function, which is called in the bt_app_a2d_data_cb function.

But in which format is the data (used by the bt_app_a2d_data_cb function as a parameter) written to the RingBuffer ringbuf_i2s ? Is it still encoded as SBC-signal or decoded to what? just PCM?

I want to do a correlation with the streamed audio signal and a prestored signal.

Thx in advance,
Phil

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