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V4L/DVB (11714): gspca - spca500 and sunplus: Change the 0x00 insertion mechanism.

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The new mechanism does not use any temporary buffer.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean-Francois Moine 2009-04-23 14:33:00 -03:00 committed by Mauro Carvalho Chehab
parent ed47119fb7
commit 59746e1390
2 changed files with 26 additions and 40 deletions
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33
drivers/media/video/gspca/spca500.c
View File

@ -32,9 +32,6 @@ MODULE_LICENSE("GPL");
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
__u8 packet[ISO_MAX_SIZE + 128];
/* !! no more than 128 ff in an ISO packet */
unsigned char brightness;
unsigned char contrast;
unsigned char colors;
@ -906,7 +903,6 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
{
struct sd *sd = (struct sd *) gspca_dev;
int i;
__u8 *s, *d;
static __u8 ffd9[] = {0xff, 0xd9};
/* frames are jpeg 4.1.1 without 0xff escape */
@ -930,22 +926,19 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
}
/* add 0x00 after 0xff */
for (i = len; --i >= 0; )
if (data[i] == 0xff)
break;
if (i < 0) { /* no 0xff */
gspca_frame_add(gspca_dev, INTER_PACKET, frame, data, len);
return;
}
s = data;
d = sd->packet;
for (i = 0; i < len; i++) {
*d++ = *s++;
if (s[-1] == 0xff)
*d++ = 0x00;
}
gspca_frame_add(gspca_dev, INTER_PACKET, frame,
sd->packet, d - sd->packet);
i = 0;
do {
if (data[i] == 0xff) {
gspca_frame_add(gspca_dev, INTER_PACKET, frame,
data, i + 1);
len -= i;
data += i;
*data = 0x00;
i = 0;
}
i++;
} while (i < len);
gspca_frame_add(gspca_dev, INTER_PACKET, frame, data, len);
}
static void setbrightness(struct gspca_dev *gspca_dev)

33
drivers/media/video/gspca/sunplus.c
View File

@ -32,9 +32,6 @@ MODULE_LICENSE("GPL");
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
__u8 packet[ISO_MAX_SIZE + 128];
/* !! no more than 128 ff in an ISO packet */
unsigned char brightness;
unsigned char contrast;
unsigned char colors;
@ -1103,7 +1100,6 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
{
struct sd *sd = (struct sd *) gspca_dev;
int i, sof = 0;
unsigned char *s, *d;
static unsigned char ffd9[] = {0xff, 0xd9};
/* frames are jpeg 4.1.1 without 0xff escape */
@ -1177,22 +1173,19 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
}
/* add 0x00 after 0xff */
for (i = len; --i >= 0; )
if (data[i] == 0xff)
break;
if (i < 0) { /* no 0xff */
gspca_frame_add(gspca_dev, INTER_PACKET, frame, data, len);
return;
}
s = data;
d = sd->packet;
for (i = 0; i < len; i++) {
*d++ = *s++;
if (s[-1] == 0xff)
*d++ = 0x00;
}
gspca_frame_add(gspca_dev, INTER_PACKET, frame,
sd->packet, d - sd->packet);
i = 0;
do {
if (data[i] == 0xff) {
gspca_frame_add(gspca_dev, INTER_PACKET, frame,
data, i + 1);
len -= i;
data += i;
*data = 0x00;
i = 0;
}
i++;
} while (i < len);
gspca_frame_add(gspca_dev, INTER_PACKET, frame, data, len);
}
static void setbrightness(struct gspca_dev *gspca_dev)