是否需要我的编解码器为ALSA？

Question

I have a project that I am working on, for the purposes of this question, lets say they are wireless speakers.

We are using the raspberry pi for development right now but we plan to move to our own embedded solution. The codec we've chosen fits our needs best, although it isn't an "ALSA supported" codec. As in the ALSA webpage doesn't have info on it.

Much of the PCM code I've found to develop this on the raspberry pi use ALSA streams. Is it a standard to use an ALSA codec for these types of projects?

I haven't worked much with embedded linux or RTOS. I work with bare-metal systems quite frequently though which explains my confusion on what ALSA exactly is. It seems like some odd middleware or something.

Answer 1

ALSA is

• the API that application that want to use sound use; and
• the library that implements this API; and
• the interface between this library and the kernel; and
• the kernel implementation of this interface; and
• the framework to be used by sound drivers.

To have your codec supported in Linux, you must write an ALSA driver.