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[media] gspca: Support variable resolution

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Add variable resolution support to gspca by allowing subdrivers to
specify try_fmt and enum_framesizes functions.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Ondrej Zary 2013-08-30 17:54:24 -03:00 committed by Mauro Carvalho Chehab
parent 1966bc2a48
commit 7d687af4d5
2 changed files with 20 additions and 6 deletions
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20
drivers/media/usb/gspca/gspca.c
View File

@ -1133,6 +1133,12 @@ static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
mode = mode2;
}
fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
if (gspca_dev->sd_desc->try_fmt) {
/* pass original resolution to subdriver try_fmt */
fmt->fmt.pix.width = w;
fmt->fmt.pix.height = h;
gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
}
/* some drivers use priv internally, zero it before giving it to
userspace */
fmt->fmt.pix.priv = 0;
@ -1171,17 +1177,16 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
goto out;
}
if (ret == gspca_dev->curr_mode) {
ret = 0;
goto out; /* same mode */
}
if (gspca_dev->streaming) {
ret = -EBUSY;
goto out;
}
gspca_dev->curr_mode = ret;
gspca_dev->pixfmt = gspca_dev->cam.cam_mode[ret];
if (gspca_dev->sd_desc->try_fmt)
/* subdriver try_fmt can modify format parameters */
gspca_dev->pixfmt = fmt->fmt.pix;
else
gspca_dev->pixfmt = gspca_dev->cam.cam_mode[ret];
ret = 0;
out:
@ -1196,6 +1201,9 @@ static int vidioc_enum_framesizes(struct file *file, void *priv,
int i;
__u32 index = 0;
if (gspca_dev->sd_desc->enum_framesizes)
return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize);
for (i = 0; i < gspca_dev->cam.nmodes; i++) {
if (fsize->pixel_format !=
gspca_dev->cam.cam_mode[i].pixelformat)

6
drivers/media/usb/gspca/gspca.h
View File

@ -88,6 +88,10 @@ typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
typedef int (*cam_int_pkt_op) (struct gspca_dev *gspca_dev,
u8 *data,
int len);
typedef void (*cam_format_op) (struct gspca_dev *gspca_dev,
struct v4l2_format *fmt);
typedef int (*cam_frmsize_op) (struct gspca_dev *gspca_dev,
struct v4l2_frmsizeenum *fsize);
/* subdriver description */
struct sd_desc {
@ -109,6 +113,8 @@ struct sd_desc {
cam_set_jpg_op set_jcomp;
cam_streamparm_op get_streamparm;
cam_streamparm_op set_streamparm;
cam_format_op try_fmt;
cam_frmsize_op enum_framesizes;
#ifdef CONFIG_VIDEO_ADV_DEBUG
cam_set_reg_op set_register;
cam_get_reg_op get_register;