Pharaoh . wrote: > I am reading 'Wring an alsa driver'. It says following about the > private_data: > > You can allocate a record for the substream and store it in > runtime->private_data. Usually, this is done in the open callback. > Don't mix this with pcm->private_data. The pcm->private_data usually > points the chip instance assigned statically at the creation of PCM, while the > runtime->private_data points a dynamic data created at the PCM open callback. > > What does static and dynamic mean here? Nothing much. "Static" just means that this is not allocated/freed together with a stream's runtime. The my_chip data is usually allocated from the heap, but the runtime->private_data is _more_ dynamic because it is allocated every time a stream is opened. HTH Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
