"Drubin, Daniel" <daniel.drubin@xxxxxxxxx> wrote: >[...] >> Does v4l handle multiple video streams to userspace at different >frame >> rates? That is what we are talking about here effectively. > >I actually mentioned v4l in context of mmap(). Fair enough. Indeed mmap support is a great feature as is splice support for other uses. Honestly I was originally waiting for the tracing guys to produce the magic lockless ring buffer that does all of this. Been a long time since I picked up on anything about that though! Not for replicating the >same mmap()ed data for multiple clients of course, but IIRC yes, v4l >allows multiple channels to be opened. E.g. for peeking full video, >preview and teletext or for switching between video sources on the same >grabber. Making the whole major node singleton is a bit harsh >restriction IMHO. Sure to that but here equivalent is opening main stream an pulling out different frame rates. Equivalent of your example is a multiple sample rate hardware device. Those are handled using multiple instances of iio_Dev. > >Best regards, >Daniel >--------------------------------------------------------------------- >Intel Israel (74) Limited > >This e-mail and any attachments may contain confidential material for >the sole use of the intended recipient(s). Any review or distribution >by others is strictly prohibited. If you are not the intended >recipient, please contact the sender and delete all copies. >N�����r��y���b�X��ǧv�^�){.n�+����{��*"��^n�r��z���h����&���G���h�(�階�ݢj"���m�����z�ޖ���f���h���~�m -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html