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V4L/DVB (10687): v4l2-common/v4l2-spec: support/document write-only and button controls

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The controls V4L2_CID_PAN_RESET and V4L2_CID_TILT_RESET changed their type
to button controls (these are unused at the moment, so this is a safe change).

The controls V4L2_CID_PAN_RELATIVE, V4L2_CID_TILT_RELATIVE, V4L2_CID_FOCUS_RELATIVE
and V4L2_CID_ZOOM_RELATIVE are marked as write-only controls.

Cc: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2009-02-20 06:30:12 -03:00 committed by Mauro Carvalho Chehab
parent 1a367f3bc3
commit 81dde91f64
1 changed files with 25 additions and 6 deletions
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31
drivers/media/video/v4l2-common.c
View file

@ -390,16 +390,16 @@ const char *v4l2_ctrl_get_name(u32 id)
switch (id) {
/* USER controls */
case V4L2_CID_USER_CLASS: return "User Controls";
case V4L2_CID_AUDIO_VOLUME: return "Volume";
case V4L2_CID_AUDIO_MUTE: return "Mute";
case V4L2_CID_AUDIO_BALANCE: return "Balance";
case V4L2_CID_AUDIO_BASS: return "Bass";
case V4L2_CID_AUDIO_TREBLE: return "Treble";
case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
case V4L2_CID_BRIGHTNESS: return "Brightness";
case V4L2_CID_CONTRAST: return "Contrast";
case V4L2_CID_SATURATION: return "Saturation";
case V4L2_CID_HUE: return "Hue";
case V4L2_CID_AUDIO_VOLUME: return "Volume";
case V4L2_CID_AUDIO_BALANCE: return "Balance";
case V4L2_CID_AUDIO_BASS: return "Bass";
case V4L2_CID_AUDIO_TREBLE: return "Treble";
case V4L2_CID_AUDIO_MUTE: return "Mute";
case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
case V4L2_CID_BLACK_LEVEL: return "Black Level";
case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
@ -499,16 +499,25 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 ste
case V4L2_CID_HFLIP:
case V4L2_CID_VFLIP:
case V4L2_CID_HUE_AUTO:
case V4L2_CID_CHROMA_AGC:
case V4L2_CID_COLOR_KILLER:
case V4L2_CID_MPEG_AUDIO_MUTE:
case V4L2_CID_MPEG_VIDEO_MUTE:
case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
case V4L2_CID_MPEG_VIDEO_PULLDOWN:
case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
case V4L2_CID_FOCUS_AUTO:
case V4L2_CID_PRIVACY:
qctrl->type = V4L2_CTRL_TYPE_BOOLEAN;
min = 0;
max = step = 1;
break;
case V4L2_CID_PAN_RESET:
case V4L2_CID_TILT_RESET:
qctrl->type = V4L2_CTRL_TYPE_BUTTON;
qctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
min = max = step = def = 0;
break;
case V4L2_CID_POWER_LINE_FREQUENCY:
case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
case V4L2_CID_MPEG_AUDIO_ENCODING:
@ -557,8 +566,17 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 ste
case V4L2_CID_CONTRAST:
case V4L2_CID_SATURATION:
case V4L2_CID_HUE:
case V4L2_CID_RED_BALANCE:
case V4L2_CID_BLUE_BALANCE:
case V4L2_CID_GAMMA:
qctrl->flags |= V4L2_CTRL_FLAG_SLIDER;
break;
case V4L2_CID_PAN_RELATIVE:
case V4L2_CID_TILT_RELATIVE:
case V4L2_CID_FOCUS_RELATIVE:
case V4L2_CID_ZOOM_RELATIVE:
qctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
break;
}
qctrl->minimum = min;
qctrl->maximum = max;
@ -578,6 +596,7 @@ int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl)
/* USER controls */
case V4L2_CID_USER_CLASS:
case V4L2_CID_MPEG_CLASS:
case V4L2_CID_CAMERA_CLASS:
return v4l2_ctrl_query_fill(qctrl, 0, 0, 0, 0);
case V4L2_CID_AUDIO_VOLUME:
return v4l2_ctrl_query_fill(qctrl, 0, 65535, 65535 / 100, 58880);