While hunting for what causes the pwc driver not
working on a 2.0 hub, I discovered that apparently
there is a cleaner way to detect the end of a frame
(at least for my cam)
pwc-if.c says around line 725:
if (flen <
pdev->vlast_packet_size) {
/* Shorter packet... We probably have the end of an
image-frame;
I discovered that for my cam (PCVC680K) there is alway
an flen equal to 0 between two frames. Hence I
modified the test to:
if ((flen == 0) && (flen <
pdev->vlast_packet_size)) {
For me this works like a charm.
I still needed the flen < pdev->vlast_packet_size part
because at startup there are also a few flen == 0
packets and without the < part these cause things to
stop too early.
Does this work for others as well?
Is this a better test. It looks more robust (when I
use my USB 2.0 hub flen seems to vary for compressed
pictures, that is why I went hunting for another
test).
Best regards, Frans.
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