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GstPhotography

GstPhotography — Interface for digital image capture elements

Stability Level

Unstable, unless otherwise indicated

Description

The interface allows access to some common digital image capture parameters.

The GstPhotography interface is unstable API and may change in future. One can define GST_USE_UNSTABLE_API to acknowledge and avoid this warning.

Functions

GstPhotographyCapturePrepared ()

void
(*GstPhotographyCapturePrepared) (gpointer data,
                                  const GstCaps *configured_caps);

This callback will be called when the element has finished preparations and is ready for image capture. The next buffer that element produces will be of configured_caps format, so this callback allows the application to e.g. reconfigure capsfilters in pipeline if any.

Parameters

data

user data that has been given, when registering the callback

 

configured_caps

GstCaps defining the configured capture format. Ownership of these caps stays in the element.

 

gst_photography_get_ev_compensation ()

gboolean
gst_photography_get_ev_compensation (GstPhotography *photo,
                                     gfloat *ev_comp);

Get the ev compensation value for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

ev_comp

ev compensation value to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_get_iso_speed ()

gboolean
gst_photography_get_iso_speed (GstPhotography *photo,
                               guint *iso_speed);

Get the ISO value (light sensivity) for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

iso_speed

ISO speed value to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_get_aperture ()

gboolean
gst_photography_get_aperture (GstPhotography *photo,
                              guint *aperture);

Get the aperture value for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

aperture

aperture value to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_get_exposure ()

gboolean
gst_photography_get_exposure (GstPhotography *photo,
                              guint32 *exposure);

Get the fixed exposure time (in us) for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

exposure

exposure time to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_get_white_balance_mode ()

gboolean
gst_photography_get_white_balance_mode
                               (GstPhotography *photo,
                                GstPhotographyWhiteBalanceMode *wb_mode);

Get the white balance mode for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

wb_mode

GstPhotographyWhiteBalanceMode to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_get_color_tone_mode ()

gboolean
gst_photography_get_color_tone_mode (GstPhotography *photo,
                                     GstPhotographyColorToneMode *tone_mode);

Get the color tone mode for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

tone_mode

GstPhotographyColorToneMode to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_get_scene_mode ()

gboolean
gst_photography_get_scene_mode (GstPhotography *photo,
                                GstPhotographySceneMode *scene_mode);

Get the scene mode for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

scene_mode

GstPhotographySceneMode to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_get_flash_mode ()

gboolean
gst_photography_get_flash_mode (GstPhotography *photo,
                                GstPhotographyFlashMode *flash_mode);

Get the flash mode for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

flash_mode

GstPhotographyFlashMode to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_get_flicker_mode ()

gboolean
gst_photography_get_flicker_mode (GstPhotography *photo,
                                  GstPhotographyFlickerReductionMode *mode);

Get the flicker mode value for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

flicker_mode

flicker mode value to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_get_focus_mode ()

gboolean
gst_photography_get_focus_mode (GstPhotography *photo,
                                GstPhotographyFocusMode *mode);

Get the focus mode value for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

focus_mode

focus_mode value to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_get_noise_reduction ()

gboolean
gst_photography_get_noise_reduction (GstPhotography *photo,
                                     GstPhotographyNoiseReduction *noise_reduction);

Get the noise reduction mode for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

noise_reduction

GstPhotographyNoiseReductionMode to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_get_zoom ()

gboolean
gst_photography_get_zoom (GstPhotography *photo,
                          gfloat *zoom);

Get the zoom value for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

zoom

zoom value to get

 

Returns

TRUE if getting the value succeeded, FALSE otherwise


gst_photography_set_ev_compensation ()

gboolean
gst_photography_set_ev_compensation (GstPhotography *photo,
                                     gfloat ev_comp);

Set the ev compensation value for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

ev_comp

ev compensation value to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_set_iso_speed ()

gboolean
gst_photography_set_iso_speed (GstPhotography *photo,
                               guint iso_speed);

Set the ISO value (light sensivity) for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

iso_speed

ISO speed value to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_set_aperture ()

gboolean
gst_photography_set_aperture (GstPhotography *photo,
                              guint aperture);

Set the aperture value for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

aperture

aperture value to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_set_exposure ()

gboolean
gst_photography_set_exposure (GstPhotography *photo,
                              guint exposure);

Set the fixed exposure time (in us) for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

exposure

exposure time to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_set_white_balance_mode ()

gboolean
gst_photography_set_white_balance_mode
                               (GstPhotography *photo,
                                GstPhotographyWhiteBalanceMode wb_mode);

Set the white balance mode for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

wb_mode

GstPhotographyWhiteBalanceMode to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_set_color_tone_mode ()

gboolean
gst_photography_set_color_tone_mode (GstPhotography *photo,
                                     GstPhotographyColorToneMode tone_mode);

Set the color tone mode for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

tone_mode

GstPhotographyColorToneMode to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_set_scene_mode ()

gboolean
gst_photography_set_scene_mode (GstPhotography *photo,
                                GstPhotographySceneMode scene_mode);

Set the scene mode for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

scene_mode

GstPhotographySceneMode to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_set_flash_mode ()

gboolean
gst_photography_set_flash_mode (GstPhotography *photo,
                                GstPhotographyFlashMode flash_mode);

Set the flash mode for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

flash_mode

GstPhotographyFlashMode to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_set_flicker_mode ()

gboolean
gst_photography_set_flicker_mode (GstPhotography *photo,
                                  GstPhotographyFlickerReductionMode mode);

Set the flicker mode value for the GstElement.

Parameters

photo

GstPhotography interface of a GstElement

 

flicker_mode

flicker mode value to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_set_focus_mode ()

gboolean
gst_photography_set_focus_mode (GstPhotography *photo,
                                GstPhotographyFocusMode mode);

Set the focus mode value for the GstElement.

Parameters

photo

GstPhotography interface of a GstElement

 

focus_mode

focus mode value to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_set_noise_reduction ()

gboolean
gst_photography_set_noise_reduction (GstPhotography *photo,
                                     GstPhotographyNoiseReduction noise_reduction);

Set the noise reduction mode for the GstElement

Parameters

photo

GstPhotography interface of a GstElement

 

noise_reduction

GstPhotographyNoiseReductionMode to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_set_zoom ()

gboolean
gst_photography_set_zoom (GstPhotography *photo,
                          gfloat zoom);

Set the zoom value for the GstElement. E.g. 1.0 to get original image and 3.0 for 3x zoom and so on.

Parameters

photo

GstPhotography interface of a GstElement

 

zoom

zoom value to set

 

Returns

TRUE if setting the value succeeded, FALSE otherwise


gst_photography_get_capabilities ()

GstPhotographyCaps
gst_photography_get_capabilities (GstPhotography *photo);

Get GstPhotographyCaps bitmask value that indicates what photography interface features the GstElement supports

Parameters

photo

GstPhotography interface of a GstElement

 

Returns

GstPhotographyCaps value


gst_photography_prepare_for_capture ()

gboolean
gst_photography_prepare_for_capture (GstPhotography *photo,
                                     GstPhotographyCapturePrepared func,
                                     GstCaps *capture_caps,
                                     gpointer user_data);

Start preparations for capture. Preparations can take indeterminate amount of time and func callback is called after preparations are done. Image capture will begin after callback returns.

Parameters

photo

GstPhotography interface of a GstElement

 

func

callback that is called after capturing has been prepared

 

capture_caps

GstCaps defining the desired format of the captured image

 

user_data

user data that will be passed to the callback func

 

Returns

TRUE if preparations were started (caps were OK), otherwise FALSE.


gst_photography_set_autofocus ()

void
gst_photography_set_autofocus (GstPhotography *photo,
                               gboolean on);

Start or stop autofocusing. GST_PHOTOGRAPHY_AUTOFOCUS_DONE message is posted to bus when autofocusing has finished.

Parameters

photo

GstPhotography interface of a GstElement

 

on

TRUE to start autofocusing, FALSE to stop autofocusing

 

gst_photography_set_config ()

gboolean
gst_photography_set_config (GstPhotography *photo,
                            GstPhotographySettings *config);

Set all configuration settings at once.

Parameters

photo

GstPhotography interface of a GstElement

 

config

GstPhotographySettings containg the configuration

 

Returns

TRUE if configuration was set successfully, otherwise FALSE.


gst_photography_get_config ()

gboolean
gst_photography_get_config (GstPhotography *photo,
                            GstPhotographySettings *config);

Get all configuration settings at once.

Parameters

photo

GstPhotography interface of a GstElement

 

config

GstPhotographySettings containg the configuration

 

Returns

TRUE if configuration was got successfully, otherwise FALSE.

Types and Values

GstPhotography

typedef struct _GstPhotography GstPhotography;

Opaque GstPhotography data structure.


enum GstPhotographyNoiseReduction

Noise Reduction features of a photography capture or filter element.

Members

GST_PHOTOGRAPHY_NOISE_REDUCTION_BAYER

Adaptive noise reduction on Bayer format

 

GST_PHOTOGRAPHY_NOISE_REDUCTION_YCC

reduces the noise on Y and 2-chroma images.

 

GST_PHOTOGRAPHY_NOISE_REDUCTION_TEMPORAL

Multi-frame adaptive NR, provided for the video mode

 

GST_PHOTOGRAPHY_NOISE_REDUCTION_FIXED

Fixed Pattern Noise refers to noise that does not change between frames. The noise is removed from the sensor image, by subtracting a previously-captured black image in memory.

 

GST_PHOTOGRAPHY_NOISE_REDUCTION_EXTRA

Extra Noise Reduction. In the case of high-ISO capturing, some noise remains after YCC NR. XNR reduces this remaining noise.

 

enum GstPhotographyWhiteBalanceMode

Modes for white balance control.

Members

GST_PHOTOGRAPHY_WB_MODE_AUTO

Choose white balance mode automatically

 

GST_PHOTOGRAPHY_WB_MODE_DAYLIGHT

Mode for daylight conditions

 

GST_PHOTOGRAPHY_WB_MODE_CLOUDY

Mode for cloudy conditions

 

GST_PHOTOGRAPHY_WB_MODE_SUNSET

Mode for sunset conditions

 

GST_PHOTOGRAPHY_WB_MODE_TUNGSTEN

Mode for tungsten lighting

 

GST_PHOTOGRAPHY_WB_MODE_FLUORESCENT

Mode for fluorescent lighting

 

GST_PHOTOGRAPHY_WB_MODE_MANUAL

Disable automatic white balance adjustment and keep current values.

 

GST_PHOTOGRAPHY_WB_MODE_WARM_FLUORESCENT

Mode for warm fluorescent lighting (Since 1.2)

 

GST_PHOTOGRAPHY_WB_MODE_SHADE

Mode for shade lighting (Since 1.2)

 

enum GstPhotographyColorToneMode

Modes for special color effects.

Members

GST_PHOTOGRAPHY_COLOR_TONE_MODE_NORMAL

No effects

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_SEPIA

Sepia

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_NEGATIVE

Negative

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_GRAYSCALE

Grayscale

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_NATURAL

Natural

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_VIVID

Vivid

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_COLORSWAP

Colorswap

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_SOLARIZE

Solarize

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_OUT_OF_FOCUS

Out of focus

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_SKY_BLUE

Sky blue

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_GRASS_GREEN

Grass green

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_SKIN_WHITEN

Skin whiten

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_POSTERIZE

Posterize (Since 1.2)

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_WHITEBOARD

Whiteboard (Since 1.2)

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_BLACKBOARD

Blackboard (Since 1.2)

 

GST_PHOTOGRAPHY_COLOR_TONE_MODE_AQUA

Aqua (Since 1.2)

 

enum GstPhotographySceneMode

Each mode contains preset GstPhotography options in order to produce good capturing result in certain scene.

Members

GST_PHOTOGRAPHY_SCENE_MODE_MANUAL

Set individual options manually

 

GST_PHOTOGRAPHY_SCENE_MODE_CLOSEUP

Mode for close objects

 

GST_PHOTOGRAPHY_SCENE_MODE_PORTRAIT

Mode for portraits

 

GST_PHOTOGRAPHY_SCENE_MODE_LANDSCAPE

Mode for landscapes

 

GST_PHOTOGRAPHY_SCENE_MODE_SPORT

Mode for scene with fast motion

 

GST_PHOTOGRAPHY_SCENE_MODE_NIGHT

Mode for night conditions

 

GST_PHOTOGRAPHY_SCENE_MODE_AUTO

Choose scene mode automatically

 

GST_PHOTOGRAPHY_SCENE_MODE_ACTION

Take photos of fast moving objects (Since 1.2)

 

GST_PHOTOGRAPHY_SCENE_MODE_NIGHT_PORTRAIT

Take people pictures at night (Since 1.2)

 

GST_PHOTOGRAPHY_SCENE_MODE_THEATRE

Take photos in a theater (Since 1.2)

 

GST_PHOTOGRAPHY_SCENE_MODE_BEACH

Take pictures on the beach (Since 1.2)

 

GST_PHOTOGRAPHY_SCENE_MODE_SNOW

Take pictures on the snow (Since 1.2)

 

GST_PHOTOGRAPHY_SCENE_MODE_SUNSET

Take sunset photos (Since 1.2)

 

GST_PHOTOGRAPHY_SCENE_MODE_STEADY_PHOTO

Avoid blurry pictures (for example, due to hand shake) (Since 1.2)

 

GST_PHOTOGRAPHY_SCENE_MODE_FIREWORKS

For shooting firework displays (Since 1.2)

 

GST_PHOTOGRAPHY_SCENE_MODE_PARTY

Take indoor low-light shot (Since 1.2)

 

GST_PHOTOGRAPHY_SCENE_MODE_CANDLELIGHT

Capture the naturally warm color of scenes lit by candles (Since 1.2)

 

GST_PHOTOGRAPHY_SCENE_MODE_BARCODE

Applications are looking for a barcode (Since 1.2)

 

enum GstPhotographyFlashMode

Modes for flash control.

Members

GST_PHOTOGRAPHY_FLASH_MODE_AUTO

Fire flash automatically according to lighting conditions.

 

GST_PHOTOGRAPHY_FLASH_MODE_OFF

Never fire flash

 

GST_PHOTOGRAPHY_FLASH_MODE_ON

Always fire flash

 

GST_PHOTOGRAPHY_FLASH_MODE_FILL_IN

Fill in flash

 

GST_PHOTOGRAPHY_FLASH_MODE_RED_EYE

Flash mode for reducing chance of capturing red eyes

 

enum GstPhotographyFlickerReductionMode

Reduce flicker in video caused by light source fluctuation.

Members

GST_PHOTOGRAPHY_FLICKER_REDUCTION_OFF

Disable flicker reduction

 

GST_PHOTOGRAPHY_FLICKER_REDUCTION_50HZ

50Hz flicker reduction

 

GST_PHOTOGRAPHY_FLICKER_REDUCTION_60HZ

60Hz flicker reduction

 

GST_PHOTOGRAPHY_FLICKER_REDUCTION_AUTO

Choose mode automatically

 

enum GstPhotographyFocusMode

Choose mode for focusing algorithm.

Members

GST_PHOTOGRAPHY_FOCUS_MODE_AUTO

Choose focus mode automatically

 

GST_PHOTOGRAPHY_FOCUS_MODE_MACRO

Mode for focusing objects close to lens

 

GST_PHOTOGRAPHY_FOCUS_MODE_PORTRAIT

Mode for portraits

 

GST_PHOTOGRAPHY_FOCUS_MODE_INFINITY

Mode for landscapes and far away objects

 

GST_PHOTOGRAPHY_FOCUS_MODE_HYPERFOCAL

Mode for maximum depth of field, keeping focus acceptable both in infinify and as close objects as possible

 

GST_PHOTOGRAPHY_FOCUS_MODE_EXTENDED

Extended focus mode

 

GST_PHOTOGRAPHY_FOCUS_MODE_CONTINUOUS_NORMAL

Continuous autofocus mode

 

GST_PHOTOGRAPHY_FOCUS_MODE_CONTINUOUS_EXTENDED

Extended continuous autofocus mode

 

GST_PHOTOGRAPHY_FOCUS_MODE_MANUAL

Disable automatic focusing and keep current value. “lens-focus” property can be used to change focus manually.

 

enum GstPhotographyFocusStatus

Status of the focusing operation, used in GST_PHOTOGRAPHY_AUTOFOCUS_DONE message.

Members

GST_PHOTOGRAPHY_FOCUS_STATUS_NONE

No status available

 

GST_PHOTOGRAPHY_FOCUS_STATUS_RUNNING

Focusing is ongoing

 

GST_PHOTOGRAPHY_FOCUS_STATUS_FAIL

Focusing failed

 

GST_PHOTOGRAPHY_FOCUS_STATUS_SUCCESS

Focusing succeeded

 

enum GstPhotographyCaps

Bitmask that indicates which GstPhotography interface features an instance supports.

Members

GST_PHOTOGRAPHY_CAPS_NONE

   

GST_PHOTOGRAPHY_CAPS_EV_COMP

   

GST_PHOTOGRAPHY_CAPS_ISO_SPEED

   

GST_PHOTOGRAPHY_CAPS_WB_MODE

   

GST_PHOTOGRAPHY_CAPS_TONE

   

GST_PHOTOGRAPHY_CAPS_SCENE

   

GST_PHOTOGRAPHY_CAPS_FLASH

   

GST_PHOTOGRAPHY_CAPS_ZOOM

   

GST_PHOTOGRAPHY_CAPS_FOCUS

   

GST_PHOTOGRAPHY_CAPS_APERTURE

   

GST_PHOTOGRAPHY_CAPS_EXPOSURE

   

GST_PHOTOGRAPHY_CAPS_SHAKE

   

GST_PHOTOGRAPHY_CAPS_WHITE_BALANCE

   

GST_PHOTOGRAPHY_CAPS_NOISE_REDUCTION

   

GST_PHOTOGRAPHY_CAPS_FLICKER_REDUCTION

   

GST_PHOTOGRAPHY_CAPS_ALL

   

enum GstPhotographyShakeRisk

Risk level of captured image becoming "shaken" due to camera movement and too long exposure time. Used in GST_PHOTOGRAPHY_SHAKE_RISK GstMessage.

Members

GST_PHOTOGRAPHY_SHAKE_RISK_LOW

Low risk

 

GST_PHOTOGRAPHY_SHAKE_RISK_MEDIUM

Medium risk

 

GST_PHOTOGRAPHY_SHAKE_RISK_HIGH

High risk

 

GST_PHOTOGRAPHY_AUTOFOCUS_DONE

#define GST_PHOTOGRAPHY_AUTOFOCUS_DONE "autofocus-done"

Name of custom GstMessage that will be posted to GstBus when autofocusing is complete. This message contains following fields:

  • GstPhotographyFocusStatus "status": Tells if focusing succeeded or failed.

  • G_TYPE_INT "focus-window-rows": Tells number of focus matrix rows.

  • G_TYPE_INT "focus-window-columns": Tells number of focus matrix columns.

  • G_TYPE_INT "focus-window-mask": Bitmask containing rows x columns bits which mark the focus points in the focus matrix. Lowest bit (LSB) always represents the top-left corner of the focus matrix. This field is only valid when focusing status is SUCCESS.


GST_PHOTOGRAPHY_SHAKE_RISK

#define GST_PHOTOGRAPHY_SHAKE_RISK "shake-risk"

Name of custom GstMessage that is posted to GstBus during autofocusing process. It is posted if there is change in the risk of captured image becoming "shaken" due to camera movement and too long exposure time.

This message contains following fields:


GST_PHOTOGRAPHY_PROP_WB_MODE

#define GST_PHOTOGRAPHY_PROP_WB_MODE            "white-balance-mode"

GST_PHOTOGRAPHY_PROP_SCENE_MODE

#define GST_PHOTOGRAPHY_PROP_SCENE_MODE         "scene-mode"

GST_PHOTOGRAPHY_PROP_FLASH_MODE

#define GST_PHOTOGRAPHY_PROP_FLASH_MODE         "flash-mode"

GST_PHOTOGRAPHY_PROP_NOISE_REDUCTION

#define GST_PHOTOGRAPHY_PROP_NOISE_REDUCTION    "noise-reduction"

GST_PHOTOGRAPHY_PROP_FOCUS_STATUS

#define GST_PHOTOGRAPHY_PROP_FOCUS_STATUS       "focus-status"

GST_PHOTOGRAPHY_PROP_CAPABILITIES

#define GST_PHOTOGRAPHY_PROP_CAPABILITIES       "capabilities"

GST_PHOTOGRAPHY_PROP_SHAKE_RISK

#define GST_PHOTOGRAPHY_PROP_SHAKE_RISK         "shake-risk"

GST_PHOTOGRAPHY_PROP_EV_COMP

#define GST_PHOTOGRAPHY_PROP_EV_COMP            "ev-compensation"

GST_PHOTOGRAPHY_PROP_ISO_SPEED

#define GST_PHOTOGRAPHY_PROP_ISO_SPEED          "iso-speed"

GST_PHOTOGRAPHY_PROP_APERTURE

#define GST_PHOTOGRAPHY_PROP_APERTURE           "aperture"

GST_PHOTOGRAPHY_PROP_IMAGE_CAPTURE_SUPPORTED_CAPS

#define             GST_PHOTOGRAPHY_PROP_IMAGE_CAPTURE_SUPPORTED_CAPS

GST_PHOTOGRAPHY_PROP_IMAGE_PREVIEW_SUPPORTED_CAPS

#define             GST_PHOTOGRAPHY_PROP_IMAGE_PREVIEW_SUPPORTED_CAPS

GST_PHOTOGRAPHY_PROP_FLICKER_MODE

#define GST_PHOTOGRAPHY_PROP_FLICKER_MODE       "flicker-mode"

GST_PHOTOGRAPHY_PROP_FOCUS_MODE

#define GST_PHOTOGRAPHY_PROP_FOCUS_MODE         "focus-mode"

GST_PHOTOGRAPHY_PROP_ZOOM

#define GST_PHOTOGRAPHY_PROP_ZOOM               "zoom"
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