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Addendum to 'Calculate iso receive cycles on firewire-core' 

The number of packets is a 4th of the number of header bytes (in case of
ABI version 1).  Also, wrap after an increment over 8000.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2009-11-23 21:37:48 +01:00
parent 72e5368aed
commit 4c4d62f248
1 changed files with 5 additions and 2 deletions
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7
src/fw-iso.c
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@ -196,7 +196,7 @@ flush_recv_packets(raw1394handle_t handle,
cycle = interrupt->cycle;
cycle &= 0x1fff;
cycle += 8000;
cycle -= end - p;
cycle -= interrupt->header_length / 4;
}
dropped = 0;
@ -211,8 +211,11 @@ flush_recv_packets(raw1394handle_t handle,
if (header_has_timestamp)
cycle = be32_to_cpu(*p++) & 0x1fff;
else
else {
cycle++;
if (cycle >= 8000)
cycle -= 8000;
}
d = fwhandle->iso.recv_handler(handle, fwhandle->iso.tail, len,
channel, tag, sy, cycle, dropped);