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[media] gspca - zc3xx: Discard the partial frames

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In some cases, some frames may not end with the JPEG end of frame.
Being not complete, they are now discarded.

Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean-François Moine 2011-01-24 16:31:58 -03:00 committed by Mauro Carvalho Chehab
parent 3d244065cb
commit a5ecdfb3da
1 changed files with 10 additions and 2 deletions
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12
drivers/media/video/gspca/zc3xx.c
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@ -6821,9 +6821,17 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
{
struct sd *sd = (struct sd *) gspca_dev;
if (data[0] == 0xff && data[1] == 0xd8) { /* start of frame */
/* check the JPEG end of frame */
if (len >= 3
&& data[len - 3] == 0xff && data[len - 2] == 0xd9) {
/*fixme: what does the last byte mean?*/
gspca_frame_add(gspca_dev, LAST_PACKET,
NULL, 0);
data, len - 1);
return;
}
/* check the JPEG start of a frame */
if (data[0] == 0xff && data[1] == 0xd8) {
/* put the JPEG header in the new frame */
gspca_frame_add(gspca_dev, FIRST_PACKET,
sd->jpeg_hdr, JPEG_HDR_SZ);