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V4L/DVB (5392): Zr364xx: Use kernel's byte-swapping function 

Some code to swap bytes wasn't using the swab16() function that the
kernel provides for this.  Make use of it, which results in more
efficient code.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Acked-by: Antoine Jacquet <royale@zerezo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Trent Piepho 2007-03-07 18:19:49 -03:00 committed by Mauro Carvalho Chehab
parent cf3c34c87f
commit 93566ad806
1 changed files with 6 additions and 7 deletions
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13
drivers/media/video/zr364xx.c
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@ -277,7 +277,7 @@ static unsigned char header3;
static int read_frame(struct zr364xx_camera *cam, int framenum)
{
int i, n, temp, head, size, actual_length;
unsigned char *ptr = NULL, *jpeg, swap;
unsigned char *ptr = NULL, *jpeg;
redo:
/* hardware brightness */
@ -308,12 +308,11 @@ static int read_frame(struct zr364xx_camera *cam, int framenum)
}
/* swap bytes if camera needs it */
if (cam->method == METHOD0)
for (i = 0; i < BUFFER_SIZE; i += 2) {
swap = cam->buffer[i];
cam->buffer[i] = cam->buffer[i + 1];
cam->buffer[i + 1] = swap;
}
if (cam->method == METHOD0) {
u16 *buf = (u16*)cam->buffer;
for (i = 0; i < BUFFER_SIZE/2; i++)
swab16s(buf + i);
}
/* write the JPEG header */
if (!head) {