A2DP AAC support in ESP-IDF 6.1

[augied]

Hi there,

It appears that the latest beta release for ESP-IDF has added AAC support.

espressif/esp-idf@7e05593
https://github.com/espressif/esp-idf/tree/release/v6.1/examples/bluetooth/bluedroid/classic_bt/a2dp_sink_stream_aac

Does this mean that you'll be able to eventually support it as well?

Thanks!

[pschatzmann]

Committed an untested DRAFT implementation: see this example

[augied]

Wow, thanks for getting to this so quickly.

I haven't been able to get it to work yet, but that could easily be my own ignorance. I'm using the idf-release/v6.1 branch of arduino-esp32. Not sure if that's the right choice. It compiles without errors, but doesn't produce any sound and doesn't offer AAC.

Is there something I'm missing? (Likely.) Can you point me in any particular direction to start troubleshooting?

[pschatzmann]

double check the settings in sdkconfig: I think this needs to be activated...

[augied]

I was using the Arduino IDE, which apparently doesn't work with sdkconfig. So, I switched over to IDF with the arduino-esp32 component. A bit of a learning curve, but I think I've figure it out. Now, I'm getting a bunch of warnings/errors along the lines of:

arduino-audio-tools/src/AudioTools/AudioCodecs/CodecSBC.h:331:12: error: format '%d' expects argument of type 'int', but argument 4 has type 'audio_tools::sample_rate_t' {aka 'long unsigned int'} [-Werror=format=] 331 | LOGE("Invalid sample_rate: %d", info.sample_rate); | ~ | | | audio_tools::sample_rate_t {aka long unsigned int}

Followed by:

HINT: The issue is better to resolve by replacing format specifiers to 'PRI'-family macros (include <inttypes.h> header file).