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author | voroshil <voroshil@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2007-09-18 16:28:39 +0000 |
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committer | voroshil <voroshil@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2007-09-18 16:28:39 +0000 |
commit | fdb78c2bea9e2e3bb2b5e01c6c3564dadbf83aba (patch) | |
tree | 57cd668f17b6558892f2febd8a95b0fdc4afb53c /stream/tvi_v4l2.c | |
parent | 04586de1ddc3ddbb52165b97c2262b65c9e41813 (diff) | |
download | mpv-fdb78c2bea9e2e3bb2b5e01c6c3564dadbf83aba.tar.bz2 mpv-fdb78c2bea9e2e3bb2b5e01c6c3564dadbf83aba.tar.xz |
Implement setting gain control for video devices (usually webcams)
in v4l2 tv:// driver.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@24573 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'stream/tvi_v4l2.c')
-rw-r--r-- | stream/tvi_v4l2.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/stream/tvi_v4l2.c b/stream/tvi_v4l2.c index d0d58cbd38..e049d940dd 100644 --- a/stream/tvi_v4l2.c +++ b/stream/tvi_v4l2.c @@ -478,7 +478,6 @@ static int set_mute(priv_t *priv, int value) */ static int set_control(priv_t *priv, struct v4l2_control *control, int val_signed) { struct v4l2_queryctrl qctrl; - qctrl.id = control->id; if (ioctl(priv->video_fd, VIDIOC_QUERYCTRL, &qctrl) < 0) { mp_msg(MSGT_TV, MSGL_ERR, "%s: ioctl query control failed: %s\n", @@ -806,6 +805,40 @@ static int control(priv_t *priv, int cmd, void *arg) control.id = V4L2_CID_SATURATION; control.value = *(int *)arg; return set_control(priv, &control, 1); + case TVI_CONTROL_VID_GET_GAIN: + { + + control.id = V4L2_CID_AUTOGAIN; + if(get_control(priv,&control,0)!=TVI_CONTROL_TRUE) + return TVI_CONTROL_FALSE; + + if(control.value){ //Auto Gain control is enabled + *(int*)arg=0; + return TVI_CONTROL_TRUE; + } + + //Manual Gain control + control.id = V4L2_CID_GAIN; + if(get_control(priv,&control,0)!=TVI_CONTROL_TRUE) + return TVI_CONTROL_FALSE; + + *(int*)arg=control.value?control.value:1; + + return TVI_CONTROL_TRUE; + } + case TVI_CONTROL_VID_SET_GAIN: + { + //value==0 means automatic gain control + int value=*(int*)arg; + + if (value < 0 || value>100) + return TVI_CONTROL_FALSE; + + control.id=value?V4L2_CID_GAIN:V4L2_CID_AUTOGAIN; + control.value=value?value:1; + + return set_control(priv,&control,0); + } case TVI_CONTROL_VID_GET_CONTRAST: control.id = V4L2_CID_CONTRAST; if (get_control(priv, &control, 1) == TVI_CONTROL_TRUE) { |