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V4L/DVB (9876): gspca - main: Allow subdrivers to handle v4l2_streamparm requests.

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Add get_streamparm and set_streamparm operations so subdrivers can
get/set stream parameters such as framerate.

Signed-off-by: Jim Paris <jim@jtan.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jim Paris 2008-12-10 06:02:42 -03:00 • committed by Mauro Carvalho Chehab
parent c06eb61941
commit 627a5ef789
2 changed files with 26 additions and 0 deletions
drivers/media/video/gspca
gspca.cgspca.h

22
drivers/media/video/gspca/gspca.c
View file

@ -1327,6 +1327,17 @@ static int vidioc_g_parm(struct file *filp, void *priv,
memset(parm, 0, sizeof *parm);
parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
parm->parm.capture.readbuffers = gspca_dev->nbufread;
if (gspca_dev->sd_desc->get_streamparm) {
int ret;
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
ret = gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
mutex_unlock(&gspca_dev->usb_lock);
return ret;
}
return 0;
}
@ -1341,6 +1352,17 @@ static int vidioc_s_parm(struct file *filp, void *priv,
parm->parm.capture.readbuffers = gspca_dev->nbufread;
else
gspca_dev->nbufread = n;
if (gspca_dev->sd_desc->set_streamparm) {
int ret;
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
ret = gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
mutex_unlock(&gspca_dev->usb_lock);
return ret;
}
return 0;
}

4
drivers/media/video/gspca/gspca.h
View file

@ -74,6 +74,8 @@ typedef void (*cam_v_op) (struct gspca_dev *);
typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
typedef int (*cam_jpg_op) (struct gspca_dev *,
struct v4l2_jpegcompression *);
typedef int (*cam_streamparm_op) (struct gspca_dev *,
struct v4l2_streamparm *);
typedef int (*cam_qmnu_op) (struct gspca_dev *,
struct v4l2_querymenu *);
typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
@ -106,6 +108,8 @@ struct sd_desc {
cam_jpg_op get_jcomp;
cam_jpg_op set_jcomp;
cam_qmnu_op querymenu;
cam_streamparm_op get_streamparm;
cam_streamparm_op set_streamparm;
};
/* packet types when moving from iso buf to frame buf */