Detect HTTP Stream Content Type and change encoder

[shaheenm]

Hi I am working on an audio streaming device that provides streams in two formats opus and mp3. when connecting to a stream i need to detect the audio format and load the correct decoder.

I have used the examples from the esp-adf to create the pipeline and confirm that I am able to stream either mp3 or opus separately. But i'm having trouble detecting the audio type before initialising the decoder and linking up the pipeline.

I have not been able to find any examples that have this type of functionality, to change the encoder to suit the stream audio format. All the examples assume a static decoder type.

Does anyone have an idea on how to setup the pipeline to be able to change the decoder on the fly if the stream audio format changes?

[tempo.tian]

Opus always encapsulated in OGG container.
It is easy to check file header to determine whether it is opus or mp3.
Ex: Opus starts with "oggS" and "OpusHead" while mp3 starts with "ID3" or 0xFF.

[ESP_Vikram]

Maybe ADF could do this for you! Please refer: https://github.com/espressif/esp-adf/tr ... ct_decoder