On Fri, Jun 29, 2007 at 08:21:45AM -0700, Jeremy Jones wrote: > I checked out the latest Reelbox testing svn code and browsed the code to > see if it supports this device. I didn't look too thoroughly but it appears > the reelbox-0.9.0 plugin does support it. It looks like communication to > the kernel space driver is done through shared memory and I did see some > kernel space code to create this shared memory device (/dev/hdshmem). I'm > sure there is a closed source firmware or kernel module that is also used > but since Reelbox is based on vdr this shouldn't be too much of a problem.
Actually there's not much closed source that affects the usage. On the PC side there's none, on the card side it's only the driver for the HDMI-chip in the kernel (otherwise Silicon Image would shoot us) and of course the firmwares for the internal audio/video-coprocessors (delivered by Micronas). The Linux on the card is a busybox-based MIPS-Linux. In the card itself the video stuff is done over a modified V4L2. We choose not to expose this API into the PC, as it would require too much kernel hacking. Instead there's only the shared memory abstraction with very little kernel code and a FIFO-channel implementation on top of it. The video player just uses this comunication and streams raw TS over such a channel. As there is also a IP network connection over the shm, you can telnet into the card, mount NFS or stream directly from an application running on the MIPS (with a little overhead, but it's good enough for >5MB/s). -- Georg Acher, [EMAIL PROTECTED] http://www.lrr.in.tum.de/~acher "Oh no, not again !" The bowl of petunias _______________________________________________ vdr mailing list firstname.lastname@example.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr