[media] V4L: Add camera scene mode control
Add control for the scene mode feature available in image sensor with more advanced ISP firmware. The V4L2_CID_SCENE_MODE menu control allows to select a set of parameters or a specific image processing and capture control algorithm optimized for common image capture conditions. Signed-off-by: HeungJun Kim <riverful.kim@samsung.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sylwester Nawrocki
Mauro Carvalho Chehab
parent
cf072139c7
commit
0bf6b7dc5f
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@ -3184,6 +3184,123 @@ sensitivity adjustments.</entry>
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</row>
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<row><entry></entry></row>
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<row id="v4l2-scene-mode">
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<entry spanname="id"><constant>V4L2_CID_SCENE_MODE</constant> </entry>
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<entry>enum v4l2_scene_mode</entry>
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</row><row><entry spanname="descr">This control allows to select
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scene programs as the camera automatic modes optimized for common shooting
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scenes. Within these modes the camera determines best exposure, aperture,
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focusing, light metering, white balance and equivalent sensitivity. The
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controls of those parameters are influenced by the scene mode control.
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An exact behavior in each mode is subject to the camera specification.
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<para>When the scene mode feature is not used, this control should be set to
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<constant>V4L2_SCENE_MODE_NONE</constant> to make sure the other possibly
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related controls are accessible. The following scene programs are defined:
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</para>
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</entry>
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</row>
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<row>
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<entrytbl spanname="descr" cols="2">
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<tbody valign="top">
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<row>
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<entry><constant>V4L2_SCENE_MODE_NONE</constant> </entry>
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<entry>The scene mode feature is disabled.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_BACKLIGHT</constant> </entry>
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<entry>Backlight. Compensates for dark shadows when light is
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coming from behind a subject, also by automatically turning
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on the flash.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_BEACH_SNOW</constant> </entry>
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<entry>Beach and snow. This mode compensates for all-white or
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bright scenes, which tend to look gray and low contrast, when camera's automatic
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exposure is based on an average scene brightness. To compensate, this mode
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automatically slightly overexposes the frames. The white balance may also be
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adjusted to compensate for the fact that reflected snow looks bluish rather
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than white.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_CANDLELIGHT</constant> </entry>
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<entry>Candle light. The camera generally raises the ISO
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sensitivity and lowers the shutter speed. This mode compensates for relatively
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close subject in the scene. The flash is disabled in order to preserve the
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ambiance of the light.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_DAWN_DUSK</constant> </entry>
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<entry>Dawn and dusk. Preserves the colors seen in low
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natural light before dusk and after down. The camera may turn off the flash,
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and automatically focus at infinity. It will usually boost saturation and
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lower the shutter speed.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_FALL_COLORS</constant> </entry>
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<entry>Fall colors. Increases saturation and adjusts white
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balance for color enhancement. Pictures of autumn leaves get saturated reds
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and yellows.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_FIREWORKS</constant> </entry>
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<entry>Fireworks. Long exposure times are used to capture
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the expanding burst of light from a firework. The camera may invoke image
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stabilization.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_LANDSCAPE</constant> </entry>
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<entry>Landscape. The camera may choose a small aperture to
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provide deep depth of field and long exposure duration to help capture detail
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in dim light conditions. The focus is fixed at infinity. Suitable for distant
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and wide scenery.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_NIGHT</constant> </entry>
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<entry>Night, also known as Night Landscape. Designed for low
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light conditions, it preserves detail in the dark areas without blowing out bright
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objects. The camera generally sets itself to a medium-to-high ISO sensitivity,
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with a relatively long exposure time, and turns flash off. As such, there will be
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increased image noise and the possibility of blurred image.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_PARTY_INDOOR</constant> </entry>
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<entry>Party and indoor. Designed to capture indoor scenes
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that are lit by indoor background lighting as well as the flash. The camera
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usually increases ISO sensitivity, and adjusts exposure for the low light
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conditions.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_PORTRAIT</constant> </entry>
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<entry>Portrait. The camera adjusts the aperture so that the
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depth of field is reduced, which helps to isolate the subject against a smooth
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background. Most cameras recognize the presence of faces in the scene and focus
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on them. The color hue is adjusted to enhance skin tones. The intensity of the
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flash is often reduced.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_SPORTS</constant> </entry>
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<entry>Sports. Significantly increases ISO and uses a fast
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shutter speed to freeze motion of rapidly-moving subjects. Increased image
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noise may be seen in this mode.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_SUNSET</constant> </entry>
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<entry>Sunset. Preserves deep hues seen in sunsets and
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sunrises. It bumps up the saturation.</entry>
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</row>
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<row>
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<entry><constant>V4L2_SCENE_MODE_TEXT</constant> </entry>
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<entry>Text. It applies extra contrast and sharpness, it is
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typically a black-and-white mode optimized for readability. Automatic focus
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may be switched to close-up mode and this setting may also involve some
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lens-distortion correction.</entry>
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</row>
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</tbody>
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</entrytbl>
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</row>
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<row><entry></entry></row>
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</tbody>
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</tgroup>
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</table>
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@ -273,6 +273,23 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
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"Auto",
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NULL
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};
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static const char * const scene_mode[] = {
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"None",
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"Backlight",
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"Beach/Snow",
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"Candle Light",
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"Dusk/Dawn",
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"Fall Colors",
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"Fireworks",
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"Landscape",
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"Night",
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"Party/Indoor",
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"Portrait",
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"Sports",
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"Sunset",
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"Text",
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NULL
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};
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static const char * const tune_preemphasis[] = {
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"No Preemphasis",
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"50 Microseconds",
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@ -448,6 +465,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
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return auto_n_preset_white_balance;
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case V4L2_CID_ISO_SENSITIVITY_AUTO:
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return camera_iso_sensitivity_auto;
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case V4L2_CID_SCENE_MODE:
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return scene_mode;
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case V4L2_CID_TUNE_PREEMPHASIS:
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return tune_preemphasis;
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case V4L2_CID_FLASH_LED_MODE:
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@ -641,6 +660,7 @@ const char *v4l2_ctrl_get_name(u32 id)
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case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
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case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
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case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
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case V4L2_CID_SCENE_MODE: return "Scene Mode";
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/* FM Radio Modulator control */
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/* Keep the order of the 'case's the same as in videodev2.h! */
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@ -793,6 +813,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
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case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
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case V4L2_CID_ISO_SENSITIVITY_AUTO:
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case V4L2_CID_EXPOSURE_METERING:
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case V4L2_CID_SCENE_MODE:
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*type = V4L2_CTRL_TYPE_MENU;
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break;
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case V4L2_CID_LINK_FREQ:
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@ -1740,6 +1740,24 @@ enum v4l2_exposure_metering {
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V4L2_EXPOSURE_METERING_SPOT = 2,
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};
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#define V4L2_CID_SCENE_MODE (V4L2_CID_CAMERA_CLASS_BASE+26)
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enum v4l2_scene_mode {
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V4L2_SCENE_MODE_NONE = 0,
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V4L2_SCENE_MODE_BACKLIGHT = 1,
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V4L2_SCENE_MODE_BEACH_SNOW = 2,
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V4L2_SCENE_MODE_CANDLE_LIGHT = 3,
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V4L2_SCENE_MODE_DAWN_DUSK = 4,
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V4L2_SCENE_MODE_FALL_COLORS = 5,
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V4L2_SCENE_MODE_FIREWORKS = 6,
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V4L2_SCENE_MODE_LANDSCAPE = 7,
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V4L2_SCENE_MODE_NIGHT = 8,
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V4L2_SCENE_MODE_PARTY_INDOOR = 9,
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V4L2_SCENE_MODE_PORTRAIT = 10,
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V4L2_SCENE_MODE_SPORTS = 11,
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V4L2_SCENE_MODE_SUNSET = 12,
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V4L2_SCENE_MODE_TEXT = 13,
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};
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/* FM Modulator class control IDs */
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#define V4L2_CID_FM_TX_CLASS_BASE (V4L2_CTRL_CLASS_FM_TX | 0x900)
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#define V4L2_CID_FM_TX_CLASS (V4L2_CTRL_CLASS_FM_TX | 1)
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