diff options
| author | Devin Heitmueller <dheitmueller@kernellabs.com> | 2010-06-13 17:00:23 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-08-02 14:49:04 -0300 |
| commit | 2584bc4337855382d23b4abfc2e2492df6fdeb41 (patch) | |
| tree | 35fb9a392cc369ccecb79212220a2fe837f599ac /drivers/media/video/em28xx/em28xx-video.c | |
| parent | 7f8eacd2162a39ca7fc1240883118a786f147ccb (diff) | |
V4L/DVB: Fix case where fields were not at the correct start location
This patch address an arithmetic error for the case where the only remaining
content in the USB packet was the "225Axxxx" start of active video. In cases
where that happened to be at the end of the frame, we would inject it into the
videobuf (which is incorrect). This caused fields to be intermittently
rendered off by two pixels.
Thanks to Eugeniy Meshcheryakov for bringing this issue to my attention
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-video.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-video.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index 20090e34173a..7b9ec6e493e4 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -654,12 +654,12 @@ static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb) } if (buf != NULL && dev->capture_type == 2) { - if (len > 4 && p[0] == 0x88 && p[1] == 0x88 && + if (len >= 4 && p[0] == 0x88 && p[1] == 0x88 && p[2] == 0x88 && p[3] == 0x88) { p += 4; len -= 4; } - if (len > 4 && p[0] == 0x22 && p[1] == 0x5a) { + if (len >= 4 && p[0] == 0x22 && p[1] == 0x5a) { em28xx_isocdbg("Video frame %d, len=%i, %s\n", p[2], len, (p[2] & 1) ? "odd" : "even"); |