diff options
| author | Jean-Francois Moine <moinejf@free.fr> | 2009-03-02 06:40:52 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 12:43:22 -0300 |
| commit | 77ac0baf24d1a43498f7bdf6efa2ee6c4ed0ebaa (patch) | |
| tree | d5a6108117df3bbf9f93ce5e69bd29ee386c9945 /drivers/media/video/gspca/mars.c | |
| parent | 71cb2764fcc51bd9e1b95be5b0f2da6f026634c7 (diff) | |
V4L/DVB (11040): gspca - most jpeg subdrivers: Have the JPEG quality settable.
The JPEG quality of the images (quantization tables) is now settable by the
VIDIOC_S_JPEGCOMP ioctl.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/gspca/mars.c')
| -rw-r--r-- | drivers/media/video/gspca/mars.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/drivers/media/video/gspca/mars.c b/drivers/media/video/gspca/mars.c index 6eb813e7b71..75e8d14e4ac 100644 --- a/drivers/media/video/gspca/mars.c +++ b/drivers/media/video/gspca/mars.c @@ -37,6 +37,9 @@ struct sd { u8 gamma; u8 sharpness; u8 quality; +#define QUALITY_MIN 40 +#define QUALITY_MAX 70 +#define QUALITY_DEF 50 u8 *jpeg_hdr; }; @@ -178,7 +181,7 @@ static int sd_config(struct gspca_dev *gspca_dev, sd->colors = COLOR_DEF; sd->gamma = GAMMA_DEF; sd->sharpness = SHARPNESS_DEF; - sd->quality = 50; + sd->quality = QUALITY_DEF; gspca_dev->nbalt = 9; /* use the altsetting 08 */ return 0; } @@ -445,6 +448,34 @@ static int sd_getsharpness(struct gspca_dev *gspca_dev, __s32 *val) return 0; } +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; + if (gspca_dev->streaming) + jpeg_set_qual(sd->jpeg_hdr, sd->quality); + return 0; +} + +static int sd_get_jcomp(struct gspca_dev *gspca_dev, + struct v4l2_jpegcompression *jcomp) +{ + struct sd *sd = (struct sd *) gspca_dev; + + memset(jcomp, 0, sizeof *jcomp); + jcomp->quality = sd->quality; + jcomp->jpeg_markers = V4L2_JPEG_MARKER_DHT + | V4L2_JPEG_MARKER_DQT; + return 0; +} + /* sub-driver description */ static const struct sd_desc sd_desc = { .name = MODULE_NAME, @@ -456,6 +487,8 @@ static const struct sd_desc sd_desc = { .stopN = sd_stopN, .stop0 = sd_stop0, .pkt_scan = sd_pkt_scan, + .get_jcomp = sd_get_jcomp, + .set_jcomp = sd_set_jcomp, }; /* -- module initialisation -- */ |