Sound_out has a problem with current SI & IDL

By 'current standardinterfaces' you are referring to standardinterfaces-metadata, correct?

Correct.

Well, maybe people should read (and understand Sound_out)

• I wrote Sound_out several years ago. It pre-dates standard interfaces.
• Sound_out absorbs data at a rate set by the sound hardware. If data is sent faster, it drops data.

When I updated components to use standard interfaces, the provides port code would not work in Sound_out due to the dropping data on overruns behavior.

Quite frankly, the sound support needs a complete overhaul. As with any piece of code I wrote that long ago, there are much better design decisions that could be made. (The polite thing to say is refactor) The device should support both the input and output paths from the sound hardware, and be able to support the various lower level sub-systems available, such as raw alsa and port audio.

Also, there is a design decision about handling overruns. The drop data during overruns is OK when the data is coming at close to the playback rate, but if you are reading data from a file, processing it, and the sending it to the sound hw, dropping is bad, rather the code should block until there is room for more data.

So basically, the least of the problem here is compiling this code against the meta standard interfaces code :)

This issue has been fixed in the trunk line of development by removing SI-MD overwriting SI.

Milestone 0.7.0 deleted