Date: Sat, 29 Jan 2005 20:19:44 +0100 From: "Petr Holub" <hopet@ics.muni.cz> To: <freebsd-firewire@freebsd.org> Cc: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> Subject: reading MPEG-2 from firewire Message-ID: <003b01c50637$7d7ae0a0$2136fb93@KLOBOUCEK>
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Hi all,
we have got our first HD camera which outputs HD MPEG-2 stream
through it's firewire interface. I've tried to hack together
simple fwcontrol based application to read the stream into
a file. I started with what's available for DV in fwdv.c
and modified the code according to what I was able to read
from different IEC61883 descriptions (don't have access to
real specs :( ). It seems to receive packets in correct
MPEG-TS format but it seems that I receive just say one
of 200 packets. Do I need to do the intialization in a different
way than the following? (I've modified PSIZE to 596 which
corresponds to maximum packet I've observed on the link
when the camera is sending.)
bufreq.rx.nchunk = NCHUNK;
bufreq.rx.npacket = NPACKET_R;
bufreq.rx.psize = PSIZE;
bufreq.tx.nchunk = 0;
bufreq.tx.npacket = 0;
bufreq.tx.psize = 0;
if (ioctl(d, FW_SSTBUF, &bufreq) < 0) {
err(1, "ioctl");
}
isoreq.ch = ich & 0x3f;
isoreq.tag = (ich >> 6) & 3;
if( ioctl(d, FW_SRSTREAM, &isoreq) < 0)
err(1, "ioctl");
Thanks for any hint,
Petr
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