opencv 0.22.0

//! # Video I/O
//!
//!  Read and write video or images sequence with OpenCV
//!
//! ### See also:
//! - @ref videoio_overview
//! - Tutorials: @ref tutorial_table_of_content_videoio
//! # Flags for video I/O
//! # Additional flags for video I/O API backends
//! # C API for video I/O
//! # iOS glue for video I/O
//! # WinRT glue for video I/O
//! # Query I/O API backends registry
use std::os::raw::{c_char, c_void};
use libc::{ptrdiff_t, size_t};
use crate::{Error, Result, core, sys, types};
use crate::core::{_InputArray, _OutputArray};

/// Android - not used
pub const CAP_ANDROID: i32 = 1000;
/// Auto detect == 0
pub const CAP_ANY: i32 = 0;
/// Aravis SDK
pub const CAP_ARAVIS: i32 = 2100;
/// AVFoundation framework for iOS (OS X Lion will have the same API)
pub const CAP_AVFOUNDATION: i32 = 1200;
/// Same value as CAP_FIREWIRE
pub const CAP_CMU1394: i32 = 300;
/// Same value as CAP_FIREWIRE
pub const CAP_DC1394: i32 = 300;
/// DirectShow (via videoInput)
pub const CAP_DSHOW: i32 = 700;
/// Open and record video file or stream using the FFMPEG library
pub const CAP_FFMPEG: i32 = 1900;
/// Same value as CAP_FIREWIRE
pub const CAP_FIREWARE: i32 = 300;
/// IEEE 1394 drivers
pub const CAP_FIREWIRE: i32 = 300;
/// Smartek Giganetix GigEVisionSDK
pub const CAP_GIGANETIX: i32 = 1300;
/// gPhoto2 connection
pub const CAP_GPHOTO2: i32 = 1700;
/// GStreamer
pub const CAP_GSTREAMER: i32 = 1800;
/// Same value as CAP_FIREWIRE
pub const CAP_IEEE1394: i32 = 300;
/// OpenCV Image Sequence (e.g. img_%02d.jpg)
pub const CAP_IMAGES: i32 = 2000;
/// RealSense (former Intel Perceptual Computing SDK)
pub const CAP_INTELPERC: i32 = 1500;
pub const CAP_INTELPERC_DEPTH_GENERATOR: i32 = 1 << 29;
/// Each pixel is a 16-bit integer. The value indicates the distance from an object to the camera's XY plane or the Cartesian depth.
pub const CAP_INTELPERC_DEPTH_MAP: i32 = 0;
pub const CAP_INTELPERC_IMAGE: i32 = 3;
pub const CAP_INTELPERC_IMAGE_GENERATOR: i32 = 1 << 28;
pub const CAP_INTELPERC_IR_GENERATOR: i32 = 1 << 27;
/// Each pixel is a 16-bit integer. The value indicates the intensity of the reflected laser beam.
pub const CAP_INTELPERC_IR_MAP: i32 = 2;
/// Each pixel contains two 32-bit floating point values in the range of 0-1, representing the mapping of depth coordinates to the color coordinates.
pub const CAP_INTELPERC_UVDEPTH_MAP: i32 = 1;
/// Intel MediaSDK
pub const CAP_INTEL_MFX: i32 = 2300;
/// Microsoft Media Foundation (via videoInput)
pub const CAP_MSMF: i32 = 1400;
/// Built-in OpenCV MotionJPEG codec
pub const CAP_OPENCV_MJPEG: i32 = 2200;
/// OpenNI (for Kinect)
pub const CAP_OPENNI: i32 = 900;
/// OpenNI2 (for Kinect)
pub const CAP_OPENNI2: i32 = 1600;
/// OpenNI2 (for Asus Xtion and Occipital Structure sensors)
pub const CAP_OPENNI2_ASUS: i32 = 1610;
/// OpenNI (for Asus Xtion)
pub const CAP_OPENNI_ASUS: i32 = 910;
/// Data given from RGB image generator
pub const CAP_OPENNI_BGR_IMAGE: i32 = 5;
pub const CAP_OPENNI_DEPTH_GENERATOR: i32 = 1 << 31;
/// Depth values in mm (CV_16UC1)
pub const CAP_OPENNI_DEPTH_MAP: i32 = 0;
/// Disparity in pixels (CV_8UC1)
pub const CAP_OPENNI_DISPARITY_MAP: i32 = 2;
/// Disparity in pixels (CV_32FC1)
pub const CAP_OPENNI_DISPARITY_MAP_32F: i32 = 3;
/// Data given from RGB image generator
pub const CAP_OPENNI_GRAY_IMAGE: i32 = 6;
pub const CAP_OPENNI_IMAGE_GENERATOR: i32 = 1 << 30;
pub const CAP_OPENNI_IR_GENERATOR: i32 = 1 << 29;
/// Data given from IR image generator
pub const CAP_OPENNI_IR_IMAGE: i32 = 7;
/// XYZ in meters (CV_32FC3)
pub const CAP_OPENNI_POINT_CLOUD_MAP: i32 = 1;
pub const CAP_OPENNI_QVGA_30HZ: i32 = 3;
pub const CAP_OPENNI_QVGA_60HZ: i32 = 4;
pub const CAP_OPENNI_SXGA_15HZ: i32 = 1;
pub const CAP_OPENNI_SXGA_30HZ: i32 = 2;
/// CV_8UC1
pub const CAP_OPENNI_VALID_DEPTH_MASK: i32 = 4;
pub const CAP_OPENNI_VGA_30HZ: i32 = 0;
/// Aperture. Can be readonly, depends on camera program.
pub const CAP_PROP_APERTURE: i32 = 17008;
pub const CAP_PROP_AUTOFOCUS: i32 = 39;
/// DC1394: exposure control done by camera, user can adjust reference level using this feature.
pub const CAP_PROP_AUTO_EXPOSURE: i32 = 21;
/// enable/ disable auto white-balance
pub const CAP_PROP_AUTO_WB: i32 = 44;
/// Current backend (enum VideoCaptureAPIs). Read-only property
pub const CAP_PROP_BACKEND: i32 = 42;
pub const CAP_PROP_BACKLIGHT: i32 = 32;
/// Brightness of the image (only for those cameras that support).
pub const CAP_PROP_BRIGHTNESS: i32 = 10;
pub const CAP_PROP_BUFFERSIZE: i32 = 38;
/// Video input or Channel Number (only for those cameras that support)
pub const CAP_PROP_CHANNEL: i32 = 43;
/// Contrast of the image (only for cameras).
pub const CAP_PROP_CONTRAST: i32 = 11;
/// Boolean flags indicating whether images should be converted to RGB.
pub const CAP_PROP_CONVERT_RGB: i32 = 16;
pub const CAP_PROP_DC1394_MAX: i32 = 31;
pub const CAP_PROP_DC1394_MODE_AUTO: i32 = -2;
/// set automatically when a value of the feature is set by the user.
pub const CAP_PROP_DC1394_MODE_MANUAL: i32 = -3;
pub const CAP_PROP_DC1394_MODE_ONE_PUSH_AUTO: i32 = -1;
/// turn the feature off (not controlled manually nor automatically).
pub const CAP_PROP_DC1394_OFF: i32 = -4;
/// Exposure (only for those cameras that support).
pub const CAP_PROP_EXPOSURE: i32 = 15;
/// Camera exposure program.
pub const CAP_PROP_EXPOSUREPROGRAM: i32 = 17009;
pub const CAP_PROP_FOCUS: i32 = 28;
/// Format of the %Mat objects returned by VideoCapture::retrieve().
pub const CAP_PROP_FORMAT: i32 = 8;
/// 4-character code of codec. see VideoWriter::fourcc .
pub const CAP_PROP_FOURCC: i32 = 6;
/// Frame rate.
pub const CAP_PROP_FPS: i32 = 5;
/// Number of frames in the video file.
pub const CAP_PROP_FRAME_COUNT: i32 = 7;
/// Height of the frames in the video stream.
pub const CAP_PROP_FRAME_HEIGHT: i32 = 4;
/// Width of the frames in the video stream.
pub const CAP_PROP_FRAME_WIDTH: i32 = 3;
/// Gain of the image (only for those cameras that support).
pub const CAP_PROP_GAIN: i32 = 14;
pub const CAP_PROP_GAMMA: i32 = 22;
pub const CAP_PROP_GIGA_FRAME_HEIGH_MAX: i32 = 10004;
pub const CAP_PROP_GIGA_FRAME_OFFSET_X: i32 = 10001;
pub const CAP_PROP_GIGA_FRAME_OFFSET_Y: i32 = 10002;
pub const CAP_PROP_GIGA_FRAME_SENS_HEIGH: i32 = 10006;
pub const CAP_PROP_GIGA_FRAME_SENS_WIDTH: i32 = 10005;
pub const CAP_PROP_GIGA_FRAME_WIDTH_MAX: i32 = 10003;
/// Collect messages with details.
pub const CAP_PROP_GPHOTO2_COLLECT_MSGS: i32 = 17005;
/// Readonly, returns (const char *).
pub const CAP_PROP_GPHOTO2_FLUSH_MSGS: i32 = 17006;
/// Capture only preview from liveview mode.
pub const CAP_PROP_GPHOTO2_PREVIEW: i32 = 17001;
/// Trigger, only by set. Reload camera settings.
pub const CAP_PROP_GPHOTO2_RELOAD_CONFIG: i32 = 17003;
/// Reload all settings on set.
pub const CAP_PROP_GPHOTO2_RELOAD_ON_CHANGE: i32 = 17004;
/// Readonly, returns (const char *).
pub const CAP_PROP_GPHOTO2_WIDGET_ENUMERATE: i32 = 17002;
/// Default is 1
pub const CAP_PROP_GSTREAMER_QUEUE_LENGTH: i32 = 200;
pub const CAP_PROP_GUID: i32 = 29;
/// Hue of the image (only for cameras).
pub const CAP_PROP_HUE: i32 = 13;
pub const CAP_PROP_IMAGES_BASE: i32 = 18000;
pub const CAP_PROP_IMAGES_LAST: i32 = 19000;
pub const CAP_PROP_INTELPERC_DEPTH_CONFIDENCE_THRESHOLD: i32 = 11005;
pub const CAP_PROP_INTELPERC_DEPTH_FOCAL_LENGTH_HORZ: i32 = 11006;
pub const CAP_PROP_INTELPERC_DEPTH_FOCAL_LENGTH_VERT: i32 = 11007;
pub const CAP_PROP_INTELPERC_DEPTH_LOW_CONFIDENCE_VALUE: i32 = 11003;
pub const CAP_PROP_INTELPERC_DEPTH_SATURATION_VALUE: i32 = 11004;
pub const CAP_PROP_INTELPERC_PROFILE_COUNT: i32 = 11001;
pub const CAP_PROP_INTELPERC_PROFILE_IDX: i32 = 11002;
pub const CAP_PROP_IOS_DEVICE_EXPOSURE: i32 = 9002;
pub const CAP_PROP_IOS_DEVICE_FLASH: i32 = 9003;
pub const CAP_PROP_IOS_DEVICE_FOCUS: i32 = 9001;
pub const CAP_PROP_IOS_DEVICE_TORCH: i32 = 9005;
pub const CAP_PROP_IOS_DEVICE_WHITEBALANCE: i32 = 9004;
pub const CAP_PROP_IRIS: i32 = 36;
pub const CAP_PROP_ISO_SPEED: i32 = 30;
/// Backend-specific value indicating the current capture mode.
pub const CAP_PROP_MODE: i32 = 9;
pub const CAP_PROP_MONOCHROME: i32 = 19;
pub const CAP_PROP_OPENNI2_MIRROR: i32 = 111;
pub const CAP_PROP_OPENNI2_SYNC: i32 = 110;
pub const CAP_PROP_OPENNI_APPROX_FRAME_SYNC: i32 = 105;
/// In mm
pub const CAP_PROP_OPENNI_BASELINE: i32 = 102;
pub const CAP_PROP_OPENNI_CIRCLE_BUFFER: i32 = 107;
/// In pixels
pub const CAP_PROP_OPENNI_FOCAL_LENGTH: i32 = 103;
/// In mm
pub const CAP_PROP_OPENNI_FRAME_MAX_DEPTH: i32 = 101;
pub const CAP_PROP_OPENNI_GENERATOR_PRESENT: i32 = 109;
pub const CAP_PROP_OPENNI_MAX_BUFFER_SIZE: i32 = 106;
pub const CAP_PROP_OPENNI_MAX_TIME_DURATION: i32 = 108;
pub const CAP_PROP_OPENNI_OUTPUT_MODE: i32 = 100;
/// Flag that synchronizes the remapping depth map to image map
pub const CAP_PROP_OPENNI_REGISTRATION: i32 = 104;
pub const CAP_PROP_OPENNI_REGISTRATION_ON: i32 = 104;
pub const CAP_PROP_PAN: i32 = 33;
/// Relative position of the video file: 0=start of the film, 1=end of the film.
pub const CAP_PROP_POS_AVI_RATIO: i32 = 2;
/// 0-based index of the frame to be decoded/captured next.
pub const CAP_PROP_POS_FRAMES: i32 = 1;
/// Current position of the video file in milliseconds.
pub const CAP_PROP_POS_MSEC: i32 = 0;
/// Horizontal binning factor.
pub const CAP_PROP_PVAPI_BINNINGX: i32 = 304;
/// Vertical binning factor.
pub const CAP_PROP_PVAPI_BINNINGY: i32 = 305;
/// Horizontal sub-sampling of the image.
pub const CAP_PROP_PVAPI_DECIMATIONHORIZONTAL: i32 = 302;
/// Vertical sub-sampling of the image.
pub const CAP_PROP_PVAPI_DECIMATIONVERTICAL: i32 = 303;
/// FrameStartTriggerMode: Determines how a frame is initiated.
pub const CAP_PROP_PVAPI_FRAMESTARTTRIGGERMODE: i32 = 301;
/// IP for enable multicast master mode. 0 for disable multicast.
pub const CAP_PROP_PVAPI_MULTICASTIP: i32 = 300;
/// Pixel format.
pub const CAP_PROP_PVAPI_PIXELFORMAT: i32 = 306;
/// Rectification flag for stereo cameras (note: only supported by DC1394 v 2.x backend currently).
pub const CAP_PROP_RECTIFICATION: i32 = 18;
pub const CAP_PROP_ROLL: i32 = 35;
/// Sample aspect ratio: num/den (den)
pub const CAP_PROP_SAR_DEN: i32 = 41;
/// Sample aspect ratio: num/den (num)
pub const CAP_PROP_SAR_NUM: i32 = 40;
/// Saturation of the image (only for cameras).
pub const CAP_PROP_SATURATION: i32 = 12;
/// Pop up video/camera filter dialog (note: only supported by DSHOW backend currently. The property value is ignored)
pub const CAP_PROP_SETTINGS: i32 = 37;
pub const CAP_PROP_SHARPNESS: i32 = 20;
/// Exposure speed. Can be readonly, depends on camera program.
pub const CAP_PROP_SPEED: i32 = 17007;
pub const CAP_PROP_TEMPERATURE: i32 = 23;
pub const CAP_PROP_TILT: i32 = 34;
pub const CAP_PROP_TRIGGER: i32 = 24;
pub const CAP_PROP_TRIGGER_DELAY: i32 = 25;
/// Enter liveview mode.
pub const CAP_PROP_VIEWFINDER: i32 = 17010;
/// white-balance color temperature
pub const CAP_PROP_WB_TEMPERATURE: i32 = 45;
/// Currently unsupported.
pub const CAP_PROP_WHITE_BALANCE_BLUE_U: i32 = 17;
pub const CAP_PROP_WHITE_BALANCE_RED_V: i32 = 26;
/// Acquisition buffer size in buffer_size_unit. Default bytes.
pub const CAP_PROP_XI_ACQ_BUFFER_SIZE: i32 = 548;
/// Acquisition buffer size unit in bytes. Default 1. E.g. Value 1024 means that buffer_size is in KiBytes.
pub const CAP_PROP_XI_ACQ_BUFFER_SIZE_UNIT: i32 = 549;
/// Sets number of frames acquired by burst. This burst is used only if trigger is set to FrameBurstStart.
pub const CAP_PROP_XI_ACQ_FRAME_BURST_COUNT: i32 = 499;
/// Type of sensor frames timing.
pub const CAP_PROP_XI_ACQ_TIMING_MODE: i32 = 538;
/// Number of buffers to commit to low level.
pub const CAP_PROP_XI_ACQ_TRANSPORT_BUFFER_COMMIT: i32 = 552;
/// Acquisition transport buffer size in bytes.
pub const CAP_PROP_XI_ACQ_TRANSPORT_BUFFER_SIZE: i32 = 550;
/// Automatic exposure/gain.
pub const CAP_PROP_XI_AEAG: i32 = 415;
/// Average intensity of output signal AEAG should achieve(in %).
pub const CAP_PROP_XI_AEAG_LEVEL: i32 = 419;
/// Automatic exposure/gain ROI Height.
pub const CAP_PROP_XI_AEAG_ROI_HEIGHT: i32 = 442;
/// Automatic exposure/gain ROI offset X.
pub const CAP_PROP_XI_AEAG_ROI_OFFSET_X: i32 = 439;
/// Automatic exposure/gain ROI offset Y.
pub const CAP_PROP_XI_AEAG_ROI_OFFSET_Y: i32 = 440;
/// Automatic exposure/gain ROI Width.
pub const CAP_PROP_XI_AEAG_ROI_WIDTH: i32 = 441;
/// Maximum limit of exposure in AEAG procedure.
pub const CAP_PROP_XI_AE_MAX_LIMIT: i32 = 417;
/// Maximum limit of gain in AEAG procedure.
pub const CAP_PROP_XI_AG_MAX_LIMIT: i32 = 418;
/// Enable applying of CMS profiles to xiGetImage (see XI_PRM_INPUT_CMS_PROFILE, XI_PRM_OUTPUT_CMS_PROFILE).
pub const CAP_PROP_XI_APPLY_CMS: i32 = 471;
/// Automatic bandwidth calculation.
pub const CAP_PROP_XI_AUTO_BANDWIDTH_CALCULATION: i32 = 573;
/// Automatic white balance.
pub const CAP_PROP_XI_AUTO_WB: i32 = 414;
/// Calculate and returns available interface bandwidth(int Megabits).
pub const CAP_PROP_XI_AVAILABLE_BANDWIDTH: i32 = 539;
/// Horizontal Binning - number of horizontal photo-sensitive cells to combine together.
pub const CAP_PROP_XI_BINNING_HORIZONTAL: i32 = 429;
/// Binning pattern type.
pub const CAP_PROP_XI_BINNING_PATTERN: i32 = 430;
/// Binning engine selector.
pub const CAP_PROP_XI_BINNING_SELECTOR: i32 = 427;
/// Vertical Binning - number of vertical photo-sensitive cells to combine together.
pub const CAP_PROP_XI_BINNING_VERTICAL: i32 = 428;
/// Correction of bad pixels.
pub const CAP_PROP_XI_BPC: i32 = 445;
/// Queue of field/frame buffers.
pub const CAP_PROP_XI_BUFFERS_QUEUE_SIZE: i32 = 551;
/// Data move policy.
pub const CAP_PROP_XI_BUFFER_POLICY: i32 = 540;
/// Color Correction Matrix element [0][0].
pub const CAP_PROP_XI_CC_MATRIX_00: i32 = 479;
/// Color Correction Matrix element [0][1].
pub const CAP_PROP_XI_CC_MATRIX_01: i32 = 480;
/// Color Correction Matrix element [0][2].
pub const CAP_PROP_XI_CC_MATRIX_02: i32 = 481;
/// Color Correction Matrix element [0][3].
pub const CAP_PROP_XI_CC_MATRIX_03: i32 = 482;
/// Color Correction Matrix element [1][0].
pub const CAP_PROP_XI_CC_MATRIX_10: i32 = 483;
/// Color Correction Matrix element [1][1].
pub const CAP_PROP_XI_CC_MATRIX_11: i32 = 484;
/// Color Correction Matrix element [1][2].
pub const CAP_PROP_XI_CC_MATRIX_12: i32 = 485;
/// Color Correction Matrix element [1][3].
pub const CAP_PROP_XI_CC_MATRIX_13: i32 = 486;
/// Color Correction Matrix element [2][0].
pub const CAP_PROP_XI_CC_MATRIX_20: i32 = 487;
/// Color Correction Matrix element [2][1].
pub const CAP_PROP_XI_CC_MATRIX_21: i32 = 488;
/// Color Correction Matrix element [2][2].
pub const CAP_PROP_XI_CC_MATRIX_22: i32 = 489;
/// Color Correction Matrix element [2][3].
pub const CAP_PROP_XI_CC_MATRIX_23: i32 = 490;
/// Color Correction Matrix element [3][0].
pub const CAP_PROP_XI_CC_MATRIX_30: i32 = 491;
/// Color Correction Matrix element [3][1].
pub const CAP_PROP_XI_CC_MATRIX_31: i32 = 492;
/// Color Correction Matrix element [3][2].
pub const CAP_PROP_XI_CC_MATRIX_32: i32 = 493;
/// Color Correction Matrix element [3][3].
pub const CAP_PROP_XI_CC_MATRIX_33: i32 = 494;
/// Camera sensor temperature.
pub const CAP_PROP_XI_CHIP_TEMP: i32 = 468;
/// Mode of color management system.
pub const CAP_PROP_XI_CMS: i32 = 470;
/// Returns color filter array type of RAW data.
pub const CAP_PROP_XI_COLOR_FILTER_ARRAY: i32 = 475;
/// Correction of column FPN.
pub const CAP_PROP_XI_COLUMN_FPN_CORRECTION: i32 = 555;
/// Start camera cooling.
pub const CAP_PROP_XI_COOLING: i32 = 466;
/// Select counter.
pub const CAP_PROP_XI_COUNTER_SELECTOR: i32 = 536;
/// Counter status.
pub const CAP_PROP_XI_COUNTER_VALUE: i32 = 537;
/// Output data format.
pub const CAP_PROP_XI_DATA_FORMAT: i32 = 401;
/// Enable/Disable debounce to selected GPI.
pub const CAP_PROP_XI_DEBOUNCE_EN: i32 = 507;
/// Debounce polarity (pol = 1 t0 - falling edge, t1 - rising edge).
pub const CAP_PROP_XI_DEBOUNCE_POL: i32 = 510;
/// Debounce time (x * 10us).
pub const CAP_PROP_XI_DEBOUNCE_T0: i32 = 508;
/// Debounce time (x * 10us).
pub const CAP_PROP_XI_DEBOUNCE_T1: i32 = 509;
/// Set debug level.
pub const CAP_PROP_XI_DEBUG_LEVEL: i32 = 572;
/// Horizontal Decimation - horizontal sub-sampling of the image - reduces the horizontal resolution of the image by the specified vertical decimation factor.
pub const CAP_PROP_XI_DECIMATION_HORIZONTAL: i32 = 433;
/// Decimation pattern type.
pub const CAP_PROP_XI_DECIMATION_PATTERN: i32 = 434;
/// Decimation engine selector.
pub const CAP_PROP_XI_DECIMATION_SELECTOR: i32 = 431;
/// Vertical Decimation - vertical sub-sampling of the image - reduces the vertical resolution of the image by the specified vertical decimation factor.
pub const CAP_PROP_XI_DECIMATION_VERTICAL: i32 = 432;
/// Set default Color Correction Matrix.
pub const CAP_PROP_XI_DEFAULT_CC_MATRIX: i32 = 495;
/// Returns device model id.
pub const CAP_PROP_XI_DEVICE_MODEL_ID: i32 = 521;
/// Resets the camera to default state.
pub const CAP_PROP_XI_DEVICE_RESET: i32 = 554;
/// Returns device serial number.
pub const CAP_PROP_XI_DEVICE_SN: i32 = 522;
/// Change image resolution by binning or skipping.
pub const CAP_PROP_XI_DOWNSAMPLING: i32 = 400;
/// Change image downsampling type.
pub const CAP_PROP_XI_DOWNSAMPLING_TYPE: i32 = 426;
/// Exposure time in microseconds.
pub const CAP_PROP_XI_EXPOSURE: i32 = 421;
/// Sets the number of times of exposure in one frame.
pub const CAP_PROP_XI_EXPOSURE_BURST_COUNT: i32 = 422;
/// Exposure priority (0.5 - exposure 50%, gain 50%).
pub const CAP_PROP_XI_EXP_PRIORITY: i32 = 416;
/// Setting of key enables file operations on some cameras.
pub const CAP_PROP_XI_FFS_ACCESS_KEY: i32 = 583;
/// File number.
pub const CAP_PROP_XI_FFS_FILE_ID: i32 = 594;
/// Size of file.
pub const CAP_PROP_XI_FFS_FILE_SIZE: i32 = 580;
/// Define framerate in Hz.
pub const CAP_PROP_XI_FRAMERATE: i32 = 535;
/// Size of free camera FFS.
pub const CAP_PROP_XI_FREE_FFS_SIZE: i32 = 581;
/// Gain in dB.
pub const CAP_PROP_XI_GAIN: i32 = 424;
/// Gain selector for parameter Gain allows to select different type of gains.
pub const CAP_PROP_XI_GAIN_SELECTOR: i32 = 423;
/// Chromaticity gamma.
pub const CAP_PROP_XI_GAMMAC: i32 = 477;
/// Luminosity gamma.
pub const CAP_PROP_XI_GAMMAY: i32 = 476;
/// Get general purpose level.
pub const CAP_PROP_XI_GPI_LEVEL: i32 = 408;
/// Set general purpose input mode.
pub const CAP_PROP_XI_GPI_MODE: i32 = 407;
/// Selects general purpose input.
pub const CAP_PROP_XI_GPI_SELECTOR: i32 = 406;
/// Set general purpose output mode.
pub const CAP_PROP_XI_GPO_MODE: i32 = 410;
/// Selects general purpose output.
pub const CAP_PROP_XI_GPO_SELECTOR: i32 = 409;
/// Enable High Dynamic Range feature.
pub const CAP_PROP_XI_HDR: i32 = 559;
/// The number of kneepoints in the PWLR.
pub const CAP_PROP_XI_HDR_KNEEPOINT_COUNT: i32 = 560;
/// Position of first kneepoint(in % of XI_PRM_EXPOSURE).
pub const CAP_PROP_XI_HDR_T1: i32 = 561;
/// Position of second kneepoint (in % of XI_PRM_EXPOSURE).
pub const CAP_PROP_XI_HDR_T2: i32 = 562;
/// Height of the Image provided by the device (in pixels).
pub const CAP_PROP_XI_HEIGHT: i32 = 452;
/// Camera housing back side temperature.
pub const CAP_PROP_XI_HOUS_BACK_SIDE_TEMP: i32 = 590;
/// Camera housing temperature.
pub const CAP_PROP_XI_HOUS_TEMP: i32 = 469;
/// Returns hardware revision number.
pub const CAP_PROP_XI_HW_REVISION: i32 = 571;
/// Last image black level counts. Can be used for Offline processing to recall it.
pub const CAP_PROP_XI_IMAGE_BLACK_LEVEL: i32 = 565;
/// bitdepth of data returned by function xiGetImage.
pub const CAP_PROP_XI_IMAGE_DATA_BIT_DEPTH: i32 = 462;
/// Output data format.
pub const CAP_PROP_XI_IMAGE_DATA_FORMAT: i32 = 435;
/// The alpha channel of RGB32 output image format.
pub const CAP_PROP_XI_IMAGE_DATA_FORMAT_RGB32_ALPHA: i32 = 529;
/// Returns 1 for color cameras.
pub const CAP_PROP_XI_IMAGE_IS_COLOR: i32 = 474;
/// Buffer size in bytes sufficient for output image returned by xiGetImage.
pub const CAP_PROP_XI_IMAGE_PAYLOAD_SIZE: i32 = 530;
/// Returns 1 for cameras that support cooling.
pub const CAP_PROP_XI_IS_COOLED: i32 = 465;
/// Returns 1 if camera connected and works properly.
pub const CAP_PROP_XI_IS_DEVICE_EXIST: i32 = 547;
/// Value of first kneepoint (% of sensor saturation).
pub const CAP_PROP_XI_KNEEPOINT1: i32 = 563;
/// Value of second kneepoint (% of sensor saturation).
pub const CAP_PROP_XI_KNEEPOINT2: i32 = 564;
/// Define camera signalling LED functionality.
pub const CAP_PROP_XI_LED_MODE: i32 = 412;
/// Selects camera signalling LED.
pub const CAP_PROP_XI_LED_SELECTOR: i32 = 411;
/// Current lens aperture value in stops. Examples: 2.8, 4, 5.6, 8, 11.
pub const CAP_PROP_XI_LENS_APERTURE_VALUE: i32 = 512;
/// Allows access to lens feature value currently selected by XI_PRM_LENS_FEATURE_SELECTOR.
pub const CAP_PROP_XI_LENS_FEATURE: i32 = 518;
/// Selects the current feature which is accessible by XI_PRM_LENS_FEATURE.
pub const CAP_PROP_XI_LENS_FEATURE_SELECTOR: i32 = 517;
/// Lens focal distance in mm.
pub const CAP_PROP_XI_LENS_FOCAL_LENGTH: i32 = 516;
/// Lens focus distance in cm.
pub const CAP_PROP_XI_LENS_FOCUS_DISTANCE: i32 = 515;
/// Moves lens focus motor by steps set in XI_PRM_LENS_FOCUS_MOVEMENT_VALUE.
pub const CAP_PROP_XI_LENS_FOCUS_MOVE: i32 = 514;
/// Lens current focus movement value to be used by XI_PRM_LENS_FOCUS_MOVE in motor steps.
pub const CAP_PROP_XI_LENS_FOCUS_MOVEMENT_VALUE: i32 = 513;
/// Status of lens control interface. This shall be set to XI_ON before any Lens operations.
pub const CAP_PROP_XI_LENS_MODE: i32 = 511;
/// Set/get bandwidth(datarate)(in Megabits).
pub const CAP_PROP_XI_LIMIT_BANDWIDTH: i32 = 459;
/// Activates LUT.
pub const CAP_PROP_XI_LUT_EN: i32 = 541;
/// Control the index (offset) of the coefficient to access in the LUT.
pub const CAP_PROP_XI_LUT_INDEX: i32 = 542;
/// Value at entry LUTIndex of the LUT.
pub const CAP_PROP_XI_LUT_VALUE: i32 = 543;
/// Calculates White Balance(must be called during acquisition).
pub const CAP_PROP_XI_MANUAL_WB: i32 = 413;
/// Horizontal offset from the origin to the area of interest (in pixels).
pub const CAP_PROP_XI_OFFSET_X: i32 = 402;
/// Vertical offset from the origin to the area of interest (in pixels).
pub const CAP_PROP_XI_OFFSET_Y: i32 = 403;
/// Device output data bit depth.
pub const CAP_PROP_XI_OUTPUT_DATA_BIT_DEPTH: i32 = 461;
/// Device output data packing (or grouping) enabled. Packing could be enabled if output_data_bit_depth > 8 and packing capability is available.
pub const CAP_PROP_XI_OUTPUT_DATA_PACKING: i32 = 463;
/// Data packing type. Some cameras supports only specific packing type.
pub const CAP_PROP_XI_OUTPUT_DATA_PACKING_TYPE: i32 = 464;
/// GetImage returns most recent frame.
pub const CAP_PROP_XI_RECENT_FRAME: i32 = 553;
/// Activates/deactivates Region selected by Region Selector.
pub const CAP_PROP_XI_REGION_MODE: i32 = 595;
/// Selects Region in Multiple ROI which parameters are set by width, height, ... ,region mode.
pub const CAP_PROP_XI_REGION_SELECTOR: i32 = 589;
/// Correction of row FPN.
pub const CAP_PROP_XI_ROW_FPN_CORRECTION: i32 = 591;
/// Camera sensor board temperature.
pub const CAP_PROP_XI_SENSOR_BOARD_TEMP: i32 = 596;
/// Sensor clock frequency in Hz.
pub const CAP_PROP_XI_SENSOR_CLOCK_FREQ_HZ: i32 = 532;
/// Sensor clock frequency index. Sensor with selected frequencies have possibility to set the frequency only by this index.
pub const CAP_PROP_XI_SENSOR_CLOCK_FREQ_INDEX: i32 = 533;
/// Sensor output data bit depth.
pub const CAP_PROP_XI_SENSOR_DATA_BIT_DEPTH: i32 = 460;
/// Selects the current feature which is accessible by XI_PRM_SENSOR_FEATURE_VALUE.
pub const CAP_PROP_XI_SENSOR_FEATURE_SELECTOR: i32 = 585;
/// Allows access to sensor feature value currently selected by XI_PRM_SENSOR_FEATURE_SELECTOR.
pub const CAP_PROP_XI_SENSOR_FEATURE_VALUE: i32 = 586;
/// Current sensor mode. Allows to select sensor mode by one integer. Setting of this parameter affects: image dimensions and downsampling.
pub const CAP_PROP_XI_SENSOR_MODE: i32 = 558;
/// Number of output channels from sensor used for data transfer.
pub const CAP_PROP_XI_SENSOR_OUTPUT_CHANNEL_COUNT: i32 = 534;
/// Number of taps.
pub const CAP_PROP_XI_SENSOR_TAPS: i32 = 437;
/// Sharpness Strength.
pub const CAP_PROP_XI_SHARPNESS: i32 = 478;
/// Change sensor shutter type(CMOS sensor).
pub const CAP_PROP_XI_SHUTTER_TYPE: i32 = 436;
/// Set sensor target temperature for cooling.
pub const CAP_PROP_XI_TARGET_TEMP: i32 = 467;
/// Selects which test pattern type is generated by the selected generator.
pub const CAP_PROP_XI_TEST_PATTERN: i32 = 588;
/// Selects which test pattern generator is controlled by the TestPattern feature.
pub const CAP_PROP_XI_TEST_PATTERN_GENERATOR_SELECTOR: i32 = 587;
/// Image capture timeout in milliseconds.
pub const CAP_PROP_XI_TIMEOUT: i32 = 420;
/// Current format of pixels on transport layer.
pub const CAP_PROP_XI_TRANSPORT_PIXEL_FORMAT: i32 = 531;
/// Specifies the delay in microseconds (us) to apply after the trigger reception before activating it.
pub const CAP_PROP_XI_TRG_DELAY: i32 = 544;
/// Selects the type of trigger.
pub const CAP_PROP_XI_TRG_SELECTOR: i32 = 498;
/// Generates an internal trigger. PRM_TRG_SOURCE must be set to TRG_SOFTWARE.
pub const CAP_PROP_XI_TRG_SOFTWARE: i32 = 405;
/// Defines source of trigger.
pub const CAP_PROP_XI_TRG_SOURCE: i32 = 404;
/// Defines how time stamp reset engine will be armed.
pub const CAP_PROP_XI_TS_RST_MODE: i32 = 545;
/// Defines which source will be used for timestamp reset. Writing this parameter will trigger settings of engine (arming).
pub const CAP_PROP_XI_TS_RST_SOURCE: i32 = 546;
/// Size of used camera FFS.
pub const CAP_PROP_XI_USED_FFS_SIZE: i32 = 582;
/// White balance blue coefficient.
pub const CAP_PROP_XI_WB_KB: i32 = 450;
/// White balance green coefficient.
pub const CAP_PROP_XI_WB_KG: i32 = 449;
/// White balance red coefficient.
pub const CAP_PROP_XI_WB_KR: i32 = 448;
/// Width of the Image provided by the device (in pixels).
pub const CAP_PROP_XI_WIDTH: i32 = 451;
pub const CAP_PROP_ZOOM: i32 = 27;
/// PvAPI, Prosilica GigE SDK
pub const CAP_PVAPI: i32 = 800;
/// 2 out of 16 decimation
pub const CAP_PVAPI_DECIMATION_2OUTOF16: i32 = 8;
/// 2 out of 4 decimation
pub const CAP_PVAPI_DECIMATION_2OUTOF4: i32 = 2;
/// 2 out of 8 decimation
pub const CAP_PVAPI_DECIMATION_2OUTOF8: i32 = 4;
/// Off
pub const CAP_PVAPI_DECIMATION_OFF: i32 = 1;
/// FixedRate
pub const CAP_PVAPI_FSTRIGMODE_FIXEDRATE: i32 = 3;
/// Freerun
pub const CAP_PVAPI_FSTRIGMODE_FREERUN: i32 = 0;
/// Software
pub const CAP_PVAPI_FSTRIGMODE_SOFTWARE: i32 = 4;
/// SyncIn1
pub const CAP_PVAPI_FSTRIGMODE_SYNCIN1: i32 = 1;
/// SyncIn2
pub const CAP_PVAPI_FSTRIGMODE_SYNCIN2: i32 = 2;
/// Bayer16
pub const CAP_PVAPI_PIXELFORMAT_BAYER16: i32 = 4;
/// Bayer8
pub const CAP_PVAPI_PIXELFORMAT_BAYER8: i32 = 3;
/// Bgr24
pub const CAP_PVAPI_PIXELFORMAT_BGR24: i32 = 6;
/// Bgra32
pub const CAP_PVAPI_PIXELFORMAT_BGRA32: i32 = 8;
/// Mono16
pub const CAP_PVAPI_PIXELFORMAT_MONO16: i32 = 2;
/// Mono8
pub const CAP_PVAPI_PIXELFORMAT_MONO8: i32 = 1;
/// Rgb24
pub const CAP_PVAPI_PIXELFORMAT_RGB24: i32 = 5;
/// Rgba32
pub const CAP_PVAPI_PIXELFORMAT_RGBA32: i32 = 7;
/// QuickTime (obsolete, removed)
pub const CAP_QT: i32 = 500;
/// Synonym for CAP_INTELPERC
pub const CAP_REALSENSE: i32 = 1500;
/// Unicap drivers (obsolete, removed)
pub const CAP_UNICAP: i32 = 600;
/// V4L/V4L2 capturing support
pub const CAP_V4L: i32 = 200;
/// Same as CAP_V4L
pub const CAP_V4L2: i32 = 200;
/// Video For Windows (obsolete, removed)
pub const CAP_VFW: i32 = 200;
/// Microsoft Windows Runtime using Media Foundation
pub const CAP_WINRT: i32 = 1410;
/// XIMEA Camera API
pub const CAP_XIAPI: i32 = 1100;
/// XINE engine (Linux)
pub const CAP_XINE: i32 = 2400;
/// (Read-only): Size of just encoded video frame. Note that the encoding order may be different from representation order.
pub const VIDEOWRITER_PROP_FRAMEBYTES: i32 = 2;
/// Number of stripes for parallel encoding. -1 for auto detection.
pub const VIDEOWRITER_PROP_NSTRIPES: i32 = 3;
/// Current quality (0..100%) of the encoded videostream. Can be adjusted dynamically in some codecs.
pub const VIDEOWRITER_PROP_QUALITY: i32 = 1;

/// %VideoCapture API backends identifier.
///
/// Select preferred API for a capture object.
/// To be used in the VideoCapture::VideoCapture() constructor or VideoCapture::open()
///
///
/// Note: Backends are available only if they have been built with your OpenCV binaries.
/// See @ref videoio_overview for more information.
#[repr(C)]
#[derive(Debug)]
pub enum VideoCaptureAPIs {
    /// Auto detect == 0
    CAP_ANY = CAP_ANY as isize,
    // Video For Windows (obsolete, removed)
    // CAP_VFW = CAP_VFW as isize, // ignored discriminant
    /// V4L/V4L2 capturing support
    CAP_V4L = CAP_V4L as isize,
    // Same as CAP_V4L
    // CAP_V4L2 = CAP_V4L2 as isize, // ignored discriminant
    /// IEEE 1394 drivers
    CAP_FIREWIRE = CAP_FIREWIRE as isize,
    // Same value as CAP_FIREWIRE
    // CAP_FIREWARE = CAP_FIREWARE as isize, // ignored discriminant
    // Same value as CAP_FIREWIRE
    // CAP_IEEE1394 = CAP_IEEE1394 as isize, // ignored discriminant
    // Same value as CAP_FIREWIRE
    // CAP_DC1394 = CAP_DC1394 as isize, // ignored discriminant
    // Same value as CAP_FIREWIRE
    // CAP_CMU1394 = CAP_CMU1394 as isize, // ignored discriminant
    /// QuickTime (obsolete, removed)
    CAP_QT = CAP_QT as isize,
    /// Unicap drivers (obsolete, removed)
    CAP_UNICAP = CAP_UNICAP as isize,
    /// DirectShow (via videoInput)
    CAP_DSHOW = CAP_DSHOW as isize,
    /// PvAPI, Prosilica GigE SDK
    CAP_PVAPI = CAP_PVAPI as isize,
    /// OpenNI (for Kinect)
    CAP_OPENNI = CAP_OPENNI as isize,
    /// OpenNI (for Asus Xtion)
    CAP_OPENNI_ASUS = CAP_OPENNI_ASUS as isize,
    /// Android - not used
    CAP_ANDROID = CAP_ANDROID as isize,
    /// XIMEA Camera API
    CAP_XIAPI = CAP_XIAPI as isize,
    /// AVFoundation framework for iOS (OS X Lion will have the same API)
    CAP_AVFOUNDATION = CAP_AVFOUNDATION as isize,
    /// Smartek Giganetix GigEVisionSDK
    CAP_GIGANETIX = CAP_GIGANETIX as isize,
    /// Microsoft Media Foundation (via videoInput)
    CAP_MSMF = CAP_MSMF as isize,
    /// Microsoft Windows Runtime using Media Foundation
    CAP_WINRT = CAP_WINRT as isize,
    /// RealSense (former Intel Perceptual Computing SDK)
    CAP_INTELPERC = CAP_INTELPERC as isize,
    // Synonym for CAP_INTELPERC
    // CAP_REALSENSE = CAP_REALSENSE as isize, // ignored discriminant
    /// OpenNI2 (for Kinect)
    CAP_OPENNI2 = CAP_OPENNI2 as isize,
    /// OpenNI2 (for Asus Xtion and Occipital Structure sensors)
    CAP_OPENNI2_ASUS = CAP_OPENNI2_ASUS as isize,
    /// gPhoto2 connection
    CAP_GPHOTO2 = CAP_GPHOTO2 as isize,
    /// GStreamer
    CAP_GSTREAMER = CAP_GSTREAMER as isize,
    /// Open and record video file or stream using the FFMPEG library
    CAP_FFMPEG = CAP_FFMPEG as isize,
    /// OpenCV Image Sequence (e.g. img_%02d.jpg)
    CAP_IMAGES = CAP_IMAGES as isize,
    /// Aravis SDK
    CAP_ARAVIS = CAP_ARAVIS as isize,
    /// Built-in OpenCV MotionJPEG codec
    CAP_OPENCV_MJPEG = CAP_OPENCV_MJPEG as isize,
    /// Intel MediaSDK
    CAP_INTEL_MFX = CAP_INTEL_MFX as isize,
    /// XINE engine (Linux)
    CAP_XINE = CAP_XINE as isize,
}

/// Returns backend API name or "UnknownVideoAPI(xxx)"
/// ## Parameters
/// * api: backend ID (#VideoCaptureAPIs)
pub fn get_backend_name(api: crate::videoio::VideoCaptureAPIs) -> Result<String> {
    unsafe { sys::cv_videoio_registry_getBackendName_VideoCaptureAPIs(api) }.into_result().map(crate::templ::receive_string_mut)
}

/// Returns list of all available backends
pub fn get_backends() -> Result<types::VectorOfVideoCaptureAPIs> {
    unsafe { sys::cv_videoio_registry_getBackends() }.into_result().map(|ptr| types::VectorOfVideoCaptureAPIs { ptr })
}

/// Returns list of available backends which works via `cv::VideoCapture(int index)`
pub fn get_camera_backends() -> Result<types::VectorOfVideoCaptureAPIs> {
    unsafe { sys::cv_videoio_registry_getCameraBackends() }.into_result().map(|ptr| types::VectorOfVideoCaptureAPIs { ptr })
}

/// Returns list of available backends which works via `cv::VideoCapture(filename)`
pub fn get_stream_backends() -> Result<types::VectorOfVideoCaptureAPIs> {
    unsafe { sys::cv_videoio_registry_getStreamBackends() }.into_result().map(|ptr| types::VectorOfVideoCaptureAPIs { ptr })
}

/// Returns list of available backends which works via `cv::VideoWriter()`
pub fn get_writer_backends() -> Result<types::VectorOfVideoCaptureAPIs> {
    unsafe { sys::cv_videoio_registry_getWriterBackends() }.into_result().map(|ptr| types::VectorOfVideoCaptureAPIs { ptr })
}

/// Returns true if backend is available
pub fn has_backend(api: crate::videoio::VideoCaptureAPIs) -> Result<bool> {
    unsafe { sys::cv_videoio_registry_hasBackend_VideoCaptureAPIs(api) }.into_result()
}

// boxed class cv::VideoCapture
/// Class for video capturing from video files, image sequences or cameras.
///
/// The class provides C++ API for capturing video from cameras or for reading video files and image sequences.
///
/// Here is how the class can be used:
/// @include samples/cpp/videocapture_basic.cpp
///
///
/// Note: In @ref videoio_c "C API" the black-box structure `CvCapture` is used instead of %VideoCapture.
///
/// Note:
/// *   (C++) A basic sample on using the %VideoCapture interface can be found at
/// `OPENCV_SOURCE_CODE/samples/cpp/videocapture_starter.cpp`
/// *   (Python) A basic sample on using the %VideoCapture interface can be found at
/// `OPENCV_SOURCE_CODE/samples/python/video.py`
/// *   (Python) A multi threaded video processing sample can be found at
/// `OPENCV_SOURCE_CODE/samples/python/video_threaded.py`
/// *   (Python) %VideoCapture sample showcasing some features of the Video4Linux2 backend
/// `OPENCV_SOURCE_CODE/samples/python/video_v4l2.py`
pub struct VideoCapture {
    #[doc(hidden)] pub(crate) ptr: *mut c_void
}

impl Drop for crate::videoio::VideoCapture {
    fn drop(&mut self) {
        unsafe { sys::cv_VideoCapture_delete(self.ptr) };
    }
}
impl crate::videoio::VideoCapture {
    #[inline(always)] pub fn as_raw_VideoCapture(&self) -> *mut c_void { self.ptr }

    pub unsafe fn from_raw_ptr(ptr: *mut c_void) -> Self {
        Self { ptr }
    }
}

unsafe impl Send for VideoCapture {}

impl VideoCapture {

    /// Default constructor
    ///
    /// Note: In @ref videoio_c "C API", when you finished working with video, release CvCapture structure with
    /// cvReleaseCapture(), or use Ptr\<CvCapture\> that calls cvReleaseCapture() automatically in the
    /// destructor.
    pub fn default() -> Result<crate::videoio::VideoCapture> {
        unsafe { sys::cv_VideoCapture_VideoCapture() }.into_result().map(|ptr| crate::videoio::VideoCapture { ptr })
    }
    
    /// Opens a video file or a capturing device or an IP video stream for video capturing with API Preference
    ///
    /// ## Parameters
    /// * filename: it can be:
    /// - name of video file (eg. `video.avi`)
    /// - or image sequence (eg. `img_%02d.jpg`, which will read samples like `img_00.jpg, img_01.jpg, img_02.jpg, ...`)
    /// - or URL of video stream (eg. `protocol://host:port/script_name?script_params|auth`).
    /// Note that each video stream or IP camera feed has its own URL scheme. Please refer to the
    /// documentation of source stream to know the right URL.
    /// * apiPreference: preferred Capture API backends to use. Can be used to enforce a specific reader
    /// implementation if multiple are available: e.g. cv::CAP_FFMPEG or cv::CAP_IMAGES or cv::CAP_DSHOW.
    /// ## See also
    /// The list of supported API backends cv::VideoCaptureAPIs
    ///
    /// ## C++ default parameters
    /// * api_preference: CAP_ANY
    pub fn new_from_file_with_backend(filename: &str, api_preference: i32) -> Result<crate::videoio::VideoCapture> {
        string_arg!(filename);
        unsafe { sys::cv_VideoCapture_VideoCapture_String_int(filename.as_ptr(), api_preference) }.into_result().map(|ptr| crate::videoio::VideoCapture { ptr })
    }
    
    /// Opens a camera for video capturing
    ///
    /// ## Parameters
    /// * index: id of the video capturing device to open. To open default camera using default backend just pass 0.
    /// (to backward compatibility usage of camera_id + domain_offset (CAP_*) is valid when apiPreference is CAP_ANY)
    /// * apiPreference: preferred Capture API backends to use. Can be used to enforce a specific reader
    /// implementation if multiple are available: e.g. cv::CAP_DSHOW or cv::CAP_MSMF or cv::CAP_V4L.
    ///
    /// ## See also
    /// The list of supported API backends cv::VideoCaptureAPIs
    ///
    /// ## C++ default parameters
    /// * api_preference: CAP_ANY
    pub fn new_with_backend(index: i32, api_preference: i32) -> Result<crate::videoio::VideoCapture> {
        unsafe { sys::cv_VideoCapture_VideoCapture_int_int(index, api_preference) }.into_result().map(|ptr| crate::videoio::VideoCapture { ptr })
    }
    
    /// Opens a video file or a capturing device or an IP video stream for video capturing.
    ///
    ///
    ///
    /// Parameters are same as the constructor VideoCapture(const String& filename, int apiPreference = CAP_ANY)
    /// ## Returns
    /// `true` if the file has been successfully opened
    ///
    /// The method first calls VideoCapture::release to close the already opened file or camera.
    ///
    /// ## C++ default parameters
    /// * api_preference: CAP_ANY
    pub fn open_file_with_backend(&mut self, filename: &str, api_preference: i32) -> Result<bool> {
        string_arg!(filename);
        unsafe { sys::cv_VideoCapture_open_String_int(self.as_raw_VideoCapture(), filename.as_ptr(), api_preference) }.into_result()
    }
    
    /// Opens a camera for video capturing
    ///
    ///
    ///
    /// Parameters are same as the constructor VideoCapture(int index, int apiPreference = CAP_ANY)
    /// ## Returns
    /// `true` if the camera has been successfully opened.
    ///
    /// The method first calls VideoCapture::release to close the already opened file or camera.
    ///
    /// ## C++ default parameters
    /// * api_preference: CAP_ANY
    pub fn open_with_backend(&mut self, index: i32, api_preference: i32) -> Result<bool> {
        unsafe { sys::cv_VideoCapture_open_int_int(self.as_raw_VideoCapture(), index, api_preference) }.into_result()
    }
    
    /// Returns true if video capturing has been initialized already.
    ///
    /// If the previous call to VideoCapture constructor or VideoCapture::open() succeeded, the method returns
    /// true.
    pub fn is_opened(&self) -> Result<bool> {
        unsafe { sys::cv_VideoCapture_isOpened_const(self.as_raw_VideoCapture()) }.into_result()
    }
    
    /// Closes video file or capturing device.
    ///
    /// The method is automatically called by subsequent VideoCapture::open and by VideoCapture
    /// destructor.
    ///
    /// The C function also deallocates memory and clears \*capture pointer.
    pub fn release(&mut self) -> Result<()> {
        unsafe { sys::cv_VideoCapture_release(self.as_raw_VideoCapture()) }.into_result()
    }
    
    /// Grabs the next frame from video file or capturing device.
    ///
    /// ## Returns
    /// `true` (non-zero) in the case of success.
    ///
    /// The method/function grabs the next frame from video file or camera and returns true (non-zero) in
    /// the case of success.
    ///
    /// The primary use of the function is in multi-camera environments, especially when the cameras do not
    /// have hardware synchronization. That is, you call VideoCapture::grab() for each camera and after that
    /// call the slower method VideoCapture::retrieve() to decode and get frame from each camera. This way
    /// the overhead on demosaicing or motion jpeg decompression etc. is eliminated and the retrieved frames
    /// from different cameras will be closer in time.
    ///
    /// Also, when a connected camera is multi-head (for example, a stereo camera or a Kinect device), the
    /// correct way of retrieving data from it is to call VideoCapture::grab() first and then call
    /// VideoCapture::retrieve() one or more times with different values of the channel parameter.
    ///
    /// @ref tutorial_kinect_openni
    pub fn grab(&mut self) -> Result<bool> {
        unsafe { sys::cv_VideoCapture_grab(self.as_raw_VideoCapture()) }.into_result()
    }
    
    /// Decodes and returns the grabbed video frame.
    ///
    /// ## Parameters
    /// * image: [out] the video frame is returned here. If no frames has been grabbed the image will be empty.
    /// * flag: it could be a frame index or a driver specific flag
    /// ## Returns
    /// `false` if no frames has been grabbed
    ///
    /// The method decodes and returns the just grabbed frame. If no frames has been grabbed
    /// (camera has been disconnected, or there are no more frames in video file), the method returns false
    /// and the function returns an empty image (with %cv::Mat, test it with Mat::empty()).
    ///
    /// ## See also
    /// read()
    ///
    ///
    /// Note: In @ref videoio_c "C API", functions cvRetrieveFrame() and cv.RetrieveFrame() return image stored inside the video
    /// capturing structure. It is not allowed to modify or release the image! You can copy the frame using
    /// cvCloneImage and then do whatever you want with the copy.
    ///
    /// ## C++ default parameters
    /// * flag: 0
    pub fn retrieve(&mut self, image: &mut dyn core::ToOutputArray, flag: i32) -> Result<bool> {
        output_array_arg!(image);
        unsafe { sys::cv_VideoCapture_retrieve__OutputArray_int(self.as_raw_VideoCapture(), image.as_raw__OutputArray(), flag) }.into_result()
    }
    
    /// Grabs, decodes and returns the next video frame.
    ///
    /// ## Parameters
    /// * image: [out] the video frame is returned here. If no frames has been grabbed the image will be empty.
    /// ## Returns
    /// `false` if no frames has been grabbed
    ///
    /// The method/function combines VideoCapture::grab() and VideoCapture::retrieve() in one call. This is the
    /// most convenient method for reading video files or capturing data from decode and returns the just
    /// grabbed frame. If no frames has been grabbed (camera has been disconnected, or there are no more
    /// frames in video file), the method returns false and the function returns empty image (with %cv::Mat, test it with Mat::empty()).
    ///
    ///
    /// Note: In @ref videoio_c "C API", functions cvRetrieveFrame() and cv.RetrieveFrame() return image stored inside the video
    /// capturing structure. It is not allowed to modify or release the image! You can copy the frame using
    /// cvCloneImage and then do whatever you want with the copy.
    pub fn read(&mut self, image: &mut dyn core::ToOutputArray) -> Result<bool> {
        output_array_arg!(image);
        unsafe { sys::cv_VideoCapture_read__OutputArray(self.as_raw_VideoCapture(), image.as_raw__OutputArray()) }.into_result()
    }
    
    /// Sets a property in the VideoCapture.
    ///
    /// ## Parameters
    /// * propId: Property identifier from cv::VideoCaptureProperties (eg. cv::CAP_PROP_POS_MSEC, cv::CAP_PROP_POS_FRAMES, ...)
    /// or one from @ref videoio_flags_others
    /// * value: Value of the property.
    /// ## Returns
    /// `true` if the property is supported by backend used by the VideoCapture instance.
    ///
    /// Note: Even if it returns `true` this doesn't ensure that the property
    /// value has been accepted by the capture device. See note in VideoCapture::get()
    pub fn set(&mut self, prop_id: i32, value: f64) -> Result<bool> {
        unsafe { sys::cv_VideoCapture_set_int_double(self.as_raw_VideoCapture(), prop_id, value) }.into_result()
    }
    
    /// Returns the specified VideoCapture property
    ///
    /// ## Parameters
    /// * propId: Property identifier from cv::VideoCaptureProperties (eg. cv::CAP_PROP_POS_MSEC, cv::CAP_PROP_POS_FRAMES, ...)
    /// or one from @ref videoio_flags_others
    /// ## Returns
    /// Value for the specified property. Value 0 is returned when querying a property that is
    /// not supported by the backend used by the VideoCapture instance.
    ///
    ///
    /// Note: Reading / writing properties involves many layers. Some unexpected result might happens
    /// along this chain.
    /// ```ignore{.txt}
    /// VideoCapture -> API Backend -> Operating System -> Device Driver -> Device Hardware
    /// ```
    ///
    /// The returned value might be different from what really used by the device or it could be encoded
    /// using device dependent rules (eg. steps or percentage). Effective behaviour depends from device
    /// driver and API Backend
    pub fn get(&self, prop_id: i32) -> Result<f64> {
        unsafe { sys::cv_VideoCapture_get_const_int(self.as_raw_VideoCapture(), prop_id) }.into_result()
    }
    
    /// Returns used backend API name
    ///
    ///
    /// Note: Stream should be opened.
    pub fn get_backend_name(&self) -> Result<String> {
        unsafe { sys::cv_VideoCapture_getBackendName_const(self.as_raw_VideoCapture()) }.into_result().map(crate::templ::receive_string_mut)
    }
    
    /// Switches exceptions mode
    ///
    /// methods raise exceptions if not successful instead of returning an error code
    pub fn set_exception_mode(&mut self, enable: bool) -> Result<()> {
        unsafe { sys::cv_VideoCapture_setExceptionMode_bool(self.as_raw_VideoCapture(), enable) }.into_result()
    }
    
    pub fn get_exception_mode(&mut self) -> Result<bool> {
        unsafe { sys::cv_VideoCapture_getExceptionMode(self.as_raw_VideoCapture()) }.into_result()
    }
    
}

// boxed class cv::VideoWriter
/// Video writer class.
///
/// The class provides C++ API for writing video files or image sequences.
pub struct VideoWriter {
    #[doc(hidden)] pub(crate) ptr: *mut c_void
}

impl Drop for crate::videoio::VideoWriter {
    fn drop(&mut self) {
        unsafe { sys::cv_VideoWriter_delete(self.ptr) };
    }
}
impl crate::videoio::VideoWriter {
    #[inline(always)] pub fn as_raw_VideoWriter(&self) -> *mut c_void { self.ptr }

    pub unsafe fn from_raw_ptr(ptr: *mut c_void) -> Self {
        Self { ptr }
    }
}

unsafe impl Send for VideoWriter {}

impl VideoWriter {

    /// Default constructors
    ///
    /// The constructors/functions initialize video writers.
    /// *   On Linux FFMPEG is used to write videos;
    /// *   On Windows FFMPEG or MSWF or DSHOW is used;
    /// *   On MacOSX AVFoundation is used.
    pub fn default() -> Result<crate::videoio::VideoWriter> {
        unsafe { sys::cv_VideoWriter_VideoWriter() }.into_result().map(|ptr| crate::videoio::VideoWriter { ptr })
    }
    
    /// ## Parameters
    /// * filename: Name of the output video file.
    /// * fourcc: 4-character code of codec used to compress the frames. For example,
    /// VideoWriter::fourcc('P','I','M','1') is a MPEG-1 codec, VideoWriter::fourcc('M','J','P','G') is a
    /// motion-jpeg codec etc. List of codes can be obtained at [Video Codecs by
    /// FOURCC](http://www.fourcc.org/codecs.php) page. FFMPEG backend with MP4 container natively uses
    /// other values as fourcc code: see [ObjectType](http://www.mp4ra.org/codecs.html),
    /// so you may receive a warning message from OpenCV about fourcc code conversion.
    /// * fps: Framerate of the created video stream.
    /// * frameSize: Size of the video frames.
    /// * isColor: If it is not zero, the encoder will expect and encode color frames, otherwise it
    /// will work with grayscale frames (the flag is currently supported on Windows only).
    ///
    /// @b Tips:
    /// - With some backends `fourcc=-1` pops up the codec selection dialog from the system.
    /// - To save image sequence use a proper filename (eg. `img_%02d.jpg`) and `fourcc=0`
    /// OR `fps=0`. Use uncompressed image format (eg. `img_%02d.BMP`) to save raw frames.
    /// - Most codecs are lossy. If you want lossless video file you need to use a lossless codecs
    /// (eg. FFMPEG FFV1, Huffman HFYU, Lagarith LAGS, etc...)
    /// - If FFMPEG is enabled, using `codec=0; fps=0;` you can create an uncompressed (raw) video file.
    ///
    /// ## C++ default parameters
    /// * is_color: true
    pub fn new(filename: &str, fourcc: i32, fps: f64, frame_size: core::Size, is_color: bool) -> Result<crate::videoio::VideoWriter> {
        string_arg!(filename);
        unsafe { sys::cv_VideoWriter_VideoWriter_String_int_double_Size_bool(filename.as_ptr(), fourcc, fps, frame_size, is_color) }.into_result().map(|ptr| crate::videoio::VideoWriter { ptr })
    }
    
    /// The `apiPreference` parameter allows to specify API backends to use. Can be used to enforce a specific reader implementation
    /// if multiple are available: e.g. cv::CAP_FFMPEG or cv::CAP_GSTREAMER.
    ///
    /// ## C++ default parameters
    /// * is_color: true
    pub fn new_with_backend(filename: &str, api_preference: i32, fourcc: i32, fps: f64, frame_size: core::Size, is_color: bool) -> Result<crate::videoio::VideoWriter> {
        string_arg!(filename);
        unsafe { sys::cv_VideoWriter_VideoWriter_String_int_int_double_Size_bool(filename.as_ptr(), api_preference, fourcc, fps, frame_size, is_color) }.into_result().map(|ptr| crate::videoio::VideoWriter { ptr })
    }
    
    /// Initializes or reinitializes video writer.
    ///
    /// The method opens video writer. Parameters are the same as in the constructor
    /// VideoWriter::VideoWriter.
    /// ## Returns
    /// `true` if video writer has been successfully initialized
    ///
    /// The method first calls VideoWriter::release to close the already opened file.
    ///
    /// ## C++ default parameters
    /// * is_color: true
    pub fn open(&mut self, filename: &str, fourcc: i32, fps: f64, frame_size: core::Size, is_color: bool) -> Result<bool> {
        string_arg!(filename);
        unsafe { sys::cv_VideoWriter_open_String_int_double_Size_bool(self.as_raw_VideoWriter(), filename.as_ptr(), fourcc, fps, frame_size, is_color) }.into_result()
    }
    
    ///
    /// ## C++ default parameters
    /// * is_color: true
    pub fn open_with_backend(&mut self, filename: &str, api_preference: i32, fourcc: i32, fps: f64, frame_size: core::Size, is_color: bool) -> Result<bool> {
        string_arg!(filename);
        unsafe { sys::cv_VideoWriter_open_String_int_int_double_Size_bool(self.as_raw_VideoWriter(), filename.as_ptr(), api_preference, fourcc, fps, frame_size, is_color) }.into_result()
    }
    
    /// Returns true if video writer has been successfully initialized.
    pub fn is_opened(&self) -> Result<bool> {
        unsafe { sys::cv_VideoWriter_isOpened_const(self.as_raw_VideoWriter()) }.into_result()
    }
    
    /// Closes the video writer.
    ///
    /// The method is automatically called by subsequent VideoWriter::open and by the VideoWriter
    /// destructor.
    pub fn release(&mut self) -> Result<()> {
        unsafe { sys::cv_VideoWriter_release(self.as_raw_VideoWriter()) }.into_result()
    }
    
    /// Writes the next video frame
    ///
    /// ## Parameters
    /// * image: The written frame. In general, color images are expected in BGR format.
    ///
    /// The function/method writes the specified image to video file. It must have the same size as has
    /// been specified when opening the video writer.
    pub fn write(&mut self, image: &dyn core::ToInputArray) -> Result<()> {
        input_array_arg!(image);
        unsafe { sys::cv_VideoWriter_write__InputArray(self.as_raw_VideoWriter(), image.as_raw__InputArray()) }.into_result()
    }
    
    /// Sets a property in the VideoWriter.
    ///
    /// ## Parameters
    /// * propId: Property identifier from cv::VideoWriterProperties (eg. cv::VIDEOWRITER_PROP_QUALITY)
    /// or one of @ref videoio_flags_others
    ///
    /// * value: Value of the property.
    /// ## Returns
    /// `true` if the property is supported by the backend used by the VideoWriter instance.
    pub fn set(&mut self, prop_id: i32, value: f64) -> Result<bool> {
        unsafe { sys::cv_VideoWriter_set_int_double(self.as_raw_VideoWriter(), prop_id, value) }.into_result()
    }
    
    /// Returns the specified VideoWriter property
    ///
    /// ## Parameters
    /// * propId: Property identifier from cv::VideoWriterProperties (eg. cv::VIDEOWRITER_PROP_QUALITY)
    /// or one of @ref videoio_flags_others
    ///
    /// ## Returns
    /// Value for the specified property. Value 0 is returned when querying a property that is
    /// not supported by the backend used by the VideoWriter instance.
    pub fn get(&self, prop_id: i32) -> Result<f64> {
        unsafe { sys::cv_VideoWriter_get_const_int(self.as_raw_VideoWriter(), prop_id) }.into_result()
    }
    
    /// Concatenates 4 chars to a fourcc code
    ///
    /// ## Returns
    /// a fourcc code
    ///
    /// This static method constructs the fourcc code of the codec to be used in the constructor
    /// VideoWriter::VideoWriter or VideoWriter::open.
    pub fn fourcc(c1: i8, c2: i8, c3: i8, c4: i8) -> Result<i32> {
        unsafe { sys::cv_VideoWriter_fourcc_char_char_char_char(c1, c2, c3, c4) }.into_result()
    }
    
    /// Returns used backend API name
    ///
    ///
    /// Note: Stream should be opened.
    pub fn get_backend_name(&self) -> Result<String> {
        unsafe { sys::cv_VideoWriter_getBackendName_const(self.as_raw_VideoWriter()) }.into_result().map(crate::templ::receive_string_mut)
    }
    
}

pub const CAP_INTELPERC_GENERATORS_MASK: i32 = 0x38000000; // 939524096
pub const CAP_OPENNI_DEPTH_GENERATOR_BASELINE: i32 = 0x80000066; // -2147483546
pub const CAP_OPENNI_DEPTH_GENERATOR_FOCAL_LENGTH: i32 = 0x80000067; // -2147483545
pub const CAP_OPENNI_DEPTH_GENERATOR_PRESENT: i32 = 0x8000006d; // -2147483539
pub const CAP_OPENNI_DEPTH_GENERATOR_REGISTRATION: i32 = 0x80000068; // -2147483544
pub const CAP_OPENNI_DEPTH_GENERATOR_REGISTRATION_ON: i32 = 0x80000068; // -2147483544
pub const CAP_OPENNI_GENERATORS_MASK: i32 = 0xe0000000; // -536870912
pub const CAP_OPENNI_IMAGE_GENERATOR_OUTPUT_MODE: i32 = 0x40000064; // 1073741924
pub const CAP_OPENNI_IMAGE_GENERATOR_PRESENT: i32 = 0x4000006d; // 1073741933
pub const CAP_OPENNI_IR_GENERATOR_PRESENT: i32 = 0x2000006d; // 536871021