The JPEG compression quality control is currently done by means of the
VIDIOC_S/G_JPEGCOMP ioctls. As the quality field of struct v4l2_jpgecomp
is being deprecated, we add the V4L2_CID_JPEG_COMPRESSION_QUALITY control,
so after the deprecation period VIDIOC_S/G_JPEGCOMP ioctl handlers can be
removed, leaving the control the only user interface for compression
quality configuration.
Cc: Jean-Francois Moine <moin...@free.fr>
Signed-off-by: Sylwester Nawrocki <sylvester.nawro...@gmail.com>
---
drivers/media/video/gspca/zc3xx.c | 45 ++++++++++++++++++++++++------------
1 files changed, 30 insertions(+), 15 deletions(-)
diff --git a/drivers/media/video/gspca/zc3xx.c
b/drivers/media/video/gspca/zc3xx.c
index f22e02f..b6a18c8 100644
--- a/drivers/media/video/gspca/zc3xx.c
+++ b/drivers/media/video/gspca/zc3xx.c
@@ -46,6 +46,7 @@ enum e_ctrl {
AUTOGAIN,
LIGHTFREQ,
SHARPNESS,
+ QUALITY,
NCTRLS /* number of controls */
};
@@ -57,11 +58,6 @@ struct sd {
struct gspca_ctrl ctrls[NCTRLS];
- u8 quality; /* image quality */
-#define QUALITY_MIN 50
-#define QUALITY_MAX 80
-#define QUALITY_DEF 70
-
u8 bridge;
u8 sensor; /* Type of image sensor chip */
u16 chip_revision;
@@ -101,6 +97,12 @@ static void setexposure(struct gspca_dev *gspca_dev);
static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val);
static void setlightfreq(struct gspca_dev *gspca_dev);
static void setsharpness(struct gspca_dev *gspca_dev);
+static void set_quality(struct gspca_dev *gspca_dev);
+
+/* JPEG image quality */
+#define QUALITY_MIN 50
+#define QUALITY_MAX 80
+#define QUALITY_DEF 70
static const struct ctrl sd_ctrls[NCTRLS] = {
[BRIGHTNESS] = {
@@ -188,6 +190,18 @@ static const struct ctrl sd_ctrls[NCTRLS] = {
},
.set_control = setsharpness
},
+[QUALITY] = {
+ {
+ .id = V4L2_CID_JPEG_COMPRESSION_QUALITY,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Compression Quality",
+ .minimum = QUALITY_MIN,
+ .maximum = QUALITY_MAX,
+ .step = 1,
+ .default_value = QUALITY_DEF,
+ },
+ .set_control = set_quality
+ },
};
static const struct v4l2_pix_format vga_mode[] = {
@@ -6411,7 +6425,6 @@ static int sd_config(struct gspca_dev *gspca_dev,
sd->sensor = id->driver_info;
gspca_dev->cam.ctrls = sd->ctrls;
- sd->quality = QUALITY_DEF;
return 0;
}
@@ -6685,7 +6698,7 @@ static int sd_start(struct gspca_dev *gspca_dev)
/* create the JPEG header */
jpeg_define(sd->jpeg_hdr, gspca_dev->height, gspca_dev->width,
0x21); /* JPEG 422 */
- jpeg_set_qual(sd->jpeg_hdr, sd->quality);
+ jpeg_set_qual(sd->jpeg_hdr, sd->ctrls[QUALITY].val);
mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
switch (sd->sensor) {
@@ -6893,19 +6906,21 @@ static int sd_querymenu(struct gspca_dev *gspca_dev,
return -EINVAL;
}
+static void set_quality(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ jpeg_set_qual(sd->jpeg_hdr, sd->ctrls[QUALITY].val);
+}
+
static int sd_set_jcomp(struct gspca_dev *gspca_dev,
struct v4l2_jpegcompression *jcomp)
{
struct sd *sd = (struct sd *) gspca_dev;
- if (jcomp->quality < QUALITY_MIN)
- sd->quality = QUALITY_MIN;
- else if (jcomp->quality > QUALITY_MAX)
- sd->quality = QUALITY_MAX;
- else
- sd->quality = jcomp->quality;
+ sd->ctrls[QUALITY].val = clamp_t(u8, jcomp->quality,
+ QUALITY_MIN, QUALITY_MAX);
if (gspca_dev->streaming)
- jpeg_set_qual(sd->jpeg_hdr, sd->quality);
+ set_quality(gspca_dev);
return gspca_dev->usb_err;
}
@@ -6915,7 +6930,7 @@ static int sd_get_jcomp(struct gspca_dev *gspca_dev,
struct sd *sd = (struct sd *) gspca_dev;
memset(jcomp, 0, sizeof *jcomp);
- jcomp->quality = sd->quality;
+ jcomp->quality = sd->ctrls[QUALITY].val;
jcomp->jpeg_markers = V4L2_JPEG_MARKER_DHT
| V4L2_JPEG_MARKER_DQT;
return 0;
--
1.7.4.1
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
