mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-05-03 00:48:44 +00:00
708 lines
26 KiB
Rust
708 lines
26 KiB
Rust
// Copyright (C) 2020 Julien Bardagi <julien.bardagi@gmail.com>
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//
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// SPDX-License-Identifier: MIT OR Apache-2.0
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use gst::glib;
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use gst::prelude::*;
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use gst::subclass::prelude::*;
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use gst_base::subclass::prelude::*;
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use gst_video::subclass::prelude::*;
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use std::sync::Mutex;
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use once_cell::sync::Lazy;
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use super::super::hsvutils;
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// Default values of properties
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const DEFAULT_HUE_REF: f32 = 0.0;
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const DEFAULT_HUE_VAR: f32 = 10.0;
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const DEFAULT_SATURATION_REF: f32 = 0.0;
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const DEFAULT_SATURATION_VAR: f32 = 0.15;
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const DEFAULT_VALUE_REF: f32 = 0.0;
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const DEFAULT_VALUE_VAR: f32 = 0.3;
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// Property value storage
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#[derive(Debug, Clone, Copy)]
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struct Settings {
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hue_ref: f32,
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hue_var: f32,
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saturation_ref: f32,
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saturation_var: f32,
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value_ref: f32,
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value_var: f32,
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}
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impl Default for Settings {
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fn default() -> Self {
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Settings {
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hue_ref: DEFAULT_HUE_REF,
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hue_var: DEFAULT_HUE_VAR,
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saturation_ref: DEFAULT_SATURATION_REF,
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saturation_var: DEFAULT_SATURATION_VAR,
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value_ref: DEFAULT_VALUE_REF,
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value_var: DEFAULT_VALUE_VAR,
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}
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}
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}
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// Struct containing all the element data
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#[derive(Default)]
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pub struct HsvDetector {
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settings: Mutex<Settings>,
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}
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static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
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gst::DebugCategory::new(
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"hsvdetector",
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gst::DebugColorFlags::empty(),
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Some("Rust HSV-based detection filter"),
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)
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});
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#[glib::object_subclass]
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impl ObjectSubclass for HsvDetector {
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const NAME: &'static str = "GstHsvDetector";
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type Type = super::HsvDetector;
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type ParentType = gst_video::VideoFilter;
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}
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fn video_input_formats() -> impl IntoIterator<Item = gst_video::VideoFormat> {
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[
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gst_video::VideoFormat::Rgbx,
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gst_video::VideoFormat::Xrgb,
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gst_video::VideoFormat::Bgrx,
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gst_video::VideoFormat::Xbgr,
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gst_video::VideoFormat::Rgb,
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gst_video::VideoFormat::Bgr,
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]
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}
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fn video_output_formats() -> impl IntoIterator<Item = gst_video::VideoFormat> {
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[
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gst_video::VideoFormat::Rgba,
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gst_video::VideoFormat::Argb,
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gst_video::VideoFormat::Bgra,
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gst_video::VideoFormat::Abgr,
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]
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}
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impl HsvDetector {
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#[inline]
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fn hsv_detect<CF, DF>(
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&self,
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in_frame: &gst_video::video_frame::VideoFrameRef<&gst::buffer::BufferRef>,
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out_frame: &mut gst_video::video_frame::VideoFrameRef<&mut gst::buffer::BufferRef>,
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to_hsv: CF,
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apply_alpha: DF,
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) where
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CF: Fn(&[u8]) -> [f32; 3],
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DF: Fn(&[u8], &mut [u8], u8),
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{
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let settings = self.settings.lock().unwrap();
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// Keep the various metadata we need for working with the video frames in
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// local variables. This saves some typing below.
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let width = in_frame.width() as usize;
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let in_stride = in_frame.plane_stride()[0] as usize;
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let in_data = in_frame.plane_data(0).unwrap();
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let out_stride = out_frame.plane_stride()[0] as usize;
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let out_data = out_frame.plane_data_mut(0).unwrap();
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let nb_input_channels = in_frame.format_info().pixel_stride()[0] as usize;
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assert_eq!(out_data.len() / out_stride, in_data.len() / in_stride);
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assert_eq!(in_data.len() % nb_input_channels, 0);
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let in_line_bytes = width * nb_input_channels;
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let out_line_bytes = width * 4;
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assert!(in_line_bytes <= in_stride);
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assert!(out_line_bytes <= out_stride);
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for (in_line, out_line) in in_data
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.chunks_exact(in_stride)
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.zip(out_data.chunks_exact_mut(out_stride))
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{
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for (in_p, out_p) in in_line[..in_line_bytes]
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.chunks_exact(nb_input_channels)
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.zip(out_line[..out_line_bytes].chunks_exact_mut(4))
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{
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let hsv = to_hsv(in_p);
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// We handle hue being circular here
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let ref_hue_offset = 180.0 - settings.hue_ref;
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let mut shifted_hue = hsv[0] + ref_hue_offset;
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if shifted_hue < 0.0 {
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shifted_hue += 360.0;
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}
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shifted_hue %= 360.0;
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if (shifted_hue - 180.0).abs() <= settings.hue_var
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&& (hsv[1] - settings.saturation_ref).abs() <= settings.saturation_var
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&& (hsv[2] - settings.value_ref).abs() <= settings.value_var
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{
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apply_alpha(in_p, out_p, 255);
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} else {
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apply_alpha(in_p, out_p, 0);
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};
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}
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}
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}
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}
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impl ObjectImpl for HsvDetector {
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fn properties() -> &'static [glib::ParamSpec] {
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static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
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vec![
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glib::ParamSpecFloat::builder("hue-ref")
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.nick("Hue reference")
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.blurb("Hue reference in degrees")
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.default_value(DEFAULT_HUE_REF)
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.mutable_playing()
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.build(),
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glib::ParamSpecFloat::builder("hue-var")
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.nick("Hue variation")
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.blurb("Allowed hue variation from the reference hue angle, in degrees")
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.minimum(0.0)
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.maximum(180.0)
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.default_value(DEFAULT_HUE_VAR)
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.mutable_playing()
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.build(),
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glib::ParamSpecFloat::builder("saturation-ref")
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.nick("Saturation reference")
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.blurb("Reference saturation value")
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.minimum(0.0)
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.maximum(1.0)
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.default_value(DEFAULT_SATURATION_REF)
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.mutable_playing()
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.build(),
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glib::ParamSpecFloat::builder("saturation-var")
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.nick("Saturation variation")
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.blurb("Allowed saturation variation from the reference value")
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.minimum(0.0)
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.maximum(1.0)
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.default_value(DEFAULT_SATURATION_VAR)
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.mutable_playing()
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.build(),
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glib::ParamSpecFloat::builder("value-ref")
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.nick("Value reference")
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.blurb("Reference value value")
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.minimum(0.0)
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.maximum(1.0)
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.default_value(DEFAULT_VALUE_REF)
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.mutable_playing()
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.build(),
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glib::ParamSpecFloat::builder("value-var")
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.nick("Value variation")
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.blurb("Allowed value variation from the reference value")
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.minimum(0.0)
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.maximum(1.0)
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.default_value(DEFAULT_VALUE_VAR)
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.mutable_playing()
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.build(),
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]
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});
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PROPERTIES.as_ref()
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}
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fn set_property(&self, _id: usize, value: &glib::Value, pspec: &glib::ParamSpec) {
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match pspec.name() {
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"hue-ref" => {
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let mut settings = self.settings.lock().unwrap();
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let hue_ref = value.get().expect("type checked upstream");
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gst::info!(
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CAT,
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imp: self,
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"Changing hue-ref from {} to {}",
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settings.hue_ref,
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hue_ref
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);
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settings.hue_ref = hue_ref;
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}
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"hue-var" => {
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let mut settings = self.settings.lock().unwrap();
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let hue_var = value.get().expect("type checked upstream");
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gst::info!(
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CAT,
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imp: self,
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"Changing hue-var from {} to {}",
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settings.hue_var,
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hue_var
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);
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settings.hue_var = hue_var;
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}
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"saturation-ref" => {
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let mut settings = self.settings.lock().unwrap();
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let saturation_ref = value.get().expect("type checked upstream");
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gst::info!(
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CAT,
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imp: self,
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"Changing saturation-ref from {} to {}",
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settings.saturation_ref,
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saturation_ref
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);
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settings.saturation_ref = saturation_ref;
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}
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"saturation-var" => {
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let mut settings = self.settings.lock().unwrap();
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let saturation_var = value.get().expect("type checked upstream");
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gst::info!(
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CAT,
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imp: self,
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"Changing saturation-var from {} to {}",
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settings.saturation_var,
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saturation_var
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);
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settings.saturation_var = saturation_var;
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}
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"value-ref" => {
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let mut settings = self.settings.lock().unwrap();
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let value_ref = value.get().expect("type checked upstream");
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gst::info!(
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CAT,
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imp: self,
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"Changing value-ref from {} to {}",
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settings.value_ref,
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value_ref
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);
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settings.value_ref = value_ref;
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}
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"value-var" => {
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let mut settings = self.settings.lock().unwrap();
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let value_var = value.get().expect("type checked upstream");
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gst::info!(
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CAT,
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imp: self,
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"Changing value-var from {} to {}",
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settings.value_var,
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value_var
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);
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settings.value_var = value_var;
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}
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_ => unimplemented!(),
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}
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}
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// Called whenever a value of a property is read. It can be called
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// at any time from any thread.
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fn property(&self, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
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match pspec.name() {
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"hue-ref" => {
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let settings = self.settings.lock().unwrap();
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settings.hue_ref.to_value()
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}
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"hue-var" => {
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let settings = self.settings.lock().unwrap();
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settings.hue_var.to_value()
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}
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"saturation-ref" => {
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let settings = self.settings.lock().unwrap();
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settings.saturation_ref.to_value()
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}
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"saturation-var" => {
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let settings = self.settings.lock().unwrap();
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settings.saturation_var.to_value()
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}
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"value-ref" => {
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let settings = self.settings.lock().unwrap();
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settings.value_ref.to_value()
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}
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"value-var" => {
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let settings = self.settings.lock().unwrap();
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settings.value_var.to_value()
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}
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_ => unimplemented!(),
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}
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}
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}
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impl GstObjectImpl for HsvDetector {}
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impl ElementImpl for HsvDetector {
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fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
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static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
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gst::subclass::ElementMetadata::new(
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"HSV detector",
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"Filter/Effect/Converter/Video",
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"Works within the HSV colorspace to mark positive pixels",
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"Julien Bardagi <julien.bardagi@gmail.com>",
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)
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});
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Some(&*ELEMENT_METADATA)
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}
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fn pad_templates() -> &'static [gst::PadTemplate] {
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static PAD_TEMPLATES: Lazy<Vec<gst::PadTemplate>> = Lazy::new(|| {
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let caps = gst_video::VideoCapsBuilder::new()
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.format_list(video_output_formats())
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.build();
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let src_pad_template = gst::PadTemplate::new(
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"src",
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gst::PadDirection::Src,
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gst::PadPresence::Always,
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&caps,
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)
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.unwrap();
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// sink pad capabilities
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let caps = gst_video::VideoCapsBuilder::new()
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.format_list(video_input_formats())
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.build();
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let sink_pad_template = gst::PadTemplate::new(
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"sink",
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gst::PadDirection::Sink,
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gst::PadPresence::Always,
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&caps,
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)
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.unwrap();
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vec![src_pad_template, sink_pad_template]
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});
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PAD_TEMPLATES.as_ref()
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}
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}
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impl BaseTransformImpl for HsvDetector {
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const MODE: gst_base::subclass::BaseTransformMode =
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gst_base::subclass::BaseTransformMode::NeverInPlace;
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const PASSTHROUGH_ON_SAME_CAPS: bool = false;
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const TRANSFORM_IP_ON_PASSTHROUGH: bool = false;
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fn transform_caps(
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&self,
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direction: gst::PadDirection,
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caps: &gst::Caps,
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filter: Option<&gst::Caps>,
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) -> Option<gst::Caps> {
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let mut other_caps = caps.clone();
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if direction == gst::PadDirection::Src {
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for s in other_caps.make_mut().iter_mut() {
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s.set("format", gst::List::new(video_input_formats()));
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}
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} else {
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for s in other_caps.make_mut().iter_mut() {
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s.set("format", gst::List::new(video_output_formats()));
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}
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};
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gst::debug!(
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CAT,
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imp: self,
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"Transformed caps from {} to {} in direction {:?}",
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caps,
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other_caps,
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direction
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);
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// In the end we need to filter the caps through an optional filter caps to get rid of any
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// unwanted caps.
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if let Some(filter) = filter {
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Some(filter.intersect_with_mode(&other_caps, gst::CapsIntersectMode::First))
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} else {
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Some(other_caps)
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}
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}
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}
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impl VideoFilterImpl for HsvDetector {
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fn transform_frame(
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&self,
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in_frame: &gst_video::VideoFrameRef<&gst::BufferRef>,
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out_frame: &mut gst_video::VideoFrameRef<&mut gst::BufferRef>,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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match in_frame.format() {
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gst_video::VideoFormat::Rgbx | gst_video::VideoFormat::Rgb => {
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match out_frame.format() {
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gst_video::VideoFormat::Rgba => {
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self.hsv_detect(
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in_frame,
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out_frame,
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|in_p| {
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hsvutils::from_rgb(
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in_p[..3].try_into().expect("slice with incorrect length"),
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)
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},
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|in_p, out_p, val| {
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out_p[..3].copy_from_slice(&in_p[..3]);
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out_p[3] = val;
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},
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);
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}
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gst_video::VideoFormat::Argb => {
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self.hsv_detect(
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in_frame,
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out_frame,
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|in_p| {
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hsvutils::from_rgb(
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in_p[..3].try_into().expect("slice with incorrect length"),
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)
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},
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|in_p, out_p, val| {
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out_p[1..4].copy_from_slice(&in_p[..3]);
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out_p[0] = val;
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},
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);
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}
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gst_video::VideoFormat::Bgra => {
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self.hsv_detect(
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in_frame,
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out_frame,
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|in_p| {
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hsvutils::from_rgb(
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in_p[..3].try_into().expect("slice with incorrect length"),
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)
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},
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|in_p, out_p, val| {
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out_p[0] = in_p[2];
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out_p[1] = in_p[1];
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out_p[2] = in_p[0];
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out_p[3] = val;
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},
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);
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}
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gst_video::VideoFormat::Abgr => {
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self.hsv_detect(
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in_frame,
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out_frame,
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|in_p| {
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hsvutils::from_rgb(
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in_p[..3].try_into().expect("slice with incorrect length"),
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)
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},
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|in_p, out_p, val| {
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out_p[1] = in_p[2];
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out_p[2] = in_p[1];
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out_p[3] = in_p[0];
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out_p[0] = val;
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},
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);
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}
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_ => unreachable!(),
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}
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}
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gst_video::VideoFormat::Xrgb => {
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match out_frame.format() {
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gst_video::VideoFormat::Rgba => {
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self.hsv_detect(
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in_frame,
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out_frame,
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|in_p| {
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hsvutils::from_rgb(
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in_p[1..4].try_into().expect("slice with incorrect length"),
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)
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},
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|in_p, out_p, val| {
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out_p[..3].copy_from_slice(&in_p[1..4]);
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out_p[3] = val;
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},
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);
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}
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gst_video::VideoFormat::Argb => {
|
|
self.hsv_detect(
|
|
in_frame,
|
|
out_frame,
|
|
|in_p| {
|
|
hsvutils::from_rgb(
|
|
in_p[1..4].try_into().expect("slice with incorrect length"),
|
|
)
|
|
},
|
|
|in_p, out_p, val| {
|
|
out_p[1..4].copy_from_slice(&in_p[1..4]);
|
|
out_p[0] = val;
|
|
},
|
|
);
|
|
}
|
|
gst_video::VideoFormat::Bgra => {
|
|
self.hsv_detect(
|
|
in_frame,
|
|
out_frame,
|
|
|in_p| {
|
|
hsvutils::from_rgb(
|
|
in_p[1..4].try_into().expect("slice with incorrect length"),
|
|
)
|
|
},
|
|
|in_p, out_p, val| {
|
|
out_p[0] = in_p[3];
|
|
out_p[1] = in_p[2];
|
|
out_p[2] = in_p[1];
|
|
out_p[3] = val;
|
|
},
|
|
);
|
|
}
|
|
gst_video::VideoFormat::Abgr => {
|
|
self.hsv_detect(
|
|
in_frame,
|
|
out_frame,
|
|
|in_p| {
|
|
hsvutils::from_rgb(
|
|
in_p[1..4].try_into().expect("slice with incorrect length"),
|
|
)
|
|
},
|
|
|in_p, out_p, val| {
|
|
out_p[1] = in_p[3];
|
|
out_p[2] = in_p[2];
|
|
out_p[3] = in_p[1];
|
|
out_p[0] = val;
|
|
},
|
|
);
|
|
}
|
|
_ => unreachable!(),
|
|
};
|
|
}
|
|
gst_video::VideoFormat::Bgrx | gst_video::VideoFormat::Bgr => {
|
|
match out_frame.format() {
|
|
gst_video::VideoFormat::Rgba => {
|
|
self.hsv_detect(
|
|
in_frame,
|
|
out_frame,
|
|
|in_p| {
|
|
hsvutils::from_bgr(
|
|
in_p[..3].try_into().expect("slice with incorrect length"),
|
|
)
|
|
},
|
|
|in_p, out_p, val| {
|
|
out_p[0] = in_p[2];
|
|
out_p[1] = in_p[1];
|
|
out_p[2] = in_p[0];
|
|
out_p[3] = val;
|
|
},
|
|
);
|
|
}
|
|
gst_video::VideoFormat::Argb => {
|
|
self.hsv_detect(
|
|
in_frame,
|
|
out_frame,
|
|
|in_p| {
|
|
hsvutils::from_bgr(
|
|
in_p[..3].try_into().expect("slice with incorrect length"),
|
|
)
|
|
},
|
|
|in_p, out_p, val| {
|
|
out_p[1] = in_p[2];
|
|
out_p[2] = in_p[1];
|
|
out_p[3] = in_p[0];
|
|
out_p[0] = val;
|
|
},
|
|
);
|
|
}
|
|
gst_video::VideoFormat::Bgra => {
|
|
self.hsv_detect(
|
|
in_frame,
|
|
out_frame,
|
|
|in_p| {
|
|
hsvutils::from_bgr(
|
|
in_p[..3].try_into().expect("slice with incorrect length"),
|
|
)
|
|
},
|
|
|in_p, out_p, val| {
|
|
out_p[..3].copy_from_slice(&in_p[..3]);
|
|
out_p[3] = val;
|
|
},
|
|
);
|
|
}
|
|
gst_video::VideoFormat::Abgr => {
|
|
self.hsv_detect(
|
|
in_frame,
|
|
out_frame,
|
|
|in_p| {
|
|
hsvutils::from_bgr(
|
|
in_p[..3].try_into().expect("slice with incorrect length"),
|
|
)
|
|
},
|
|
|in_p, out_p, val| {
|
|
out_p[1..4].copy_from_slice(&in_p[..3]);
|
|
out_p[0] = val;
|
|
},
|
|
);
|
|
}
|
|
_ => unreachable!(),
|
|
}
|
|
}
|
|
gst_video::VideoFormat::Xbgr => match out_frame.format() {
|
|
gst_video::VideoFormat::Rgba => {
|
|
self.hsv_detect(
|
|
in_frame,
|
|
out_frame,
|
|
|in_p| {
|
|
hsvutils::from_bgr(
|
|
in_p[1..4].try_into().expect("slice with incorrect length"),
|
|
)
|
|
},
|
|
|in_p, out_p, val| {
|
|
out_p[0] = in_p[3];
|
|
out_p[1] = in_p[2];
|
|
out_p[2] = in_p[1];
|
|
out_p[3] = val;
|
|
},
|
|
);
|
|
}
|
|
gst_video::VideoFormat::Argb => {
|
|
self.hsv_detect(
|
|
in_frame,
|
|
out_frame,
|
|
|in_p| {
|
|
hsvutils::from_bgr(
|
|
in_p[1..4].try_into().expect("slice with incorrect length"),
|
|
)
|
|
},
|
|
|in_p, out_p, val| {
|
|
out_p[1] = in_p[3];
|
|
out_p[2] = in_p[2];
|
|
out_p[3] = in_p[1];
|
|
out_p[0] = val;
|
|
},
|
|
);
|
|
}
|
|
gst_video::VideoFormat::Bgra => {
|
|
self.hsv_detect(
|
|
in_frame,
|
|
out_frame,
|
|
|in_p| {
|
|
hsvutils::from_bgr(
|
|
in_p[1..4].try_into().expect("slice with incorrect length"),
|
|
)
|
|
},
|
|
|in_p, out_p, val| {
|
|
out_p[..3].copy_from_slice(&in_p[1..4]);
|
|
out_p[3] = val;
|
|
},
|
|
);
|
|
}
|
|
gst_video::VideoFormat::Abgr => {
|
|
self.hsv_detect(
|
|
in_frame,
|
|
out_frame,
|
|
|in_p| {
|
|
hsvutils::from_bgr(
|
|
in_p[1..4].try_into().expect("slice with incorrect length"),
|
|
)
|
|
},
|
|
|in_p, out_p, val| {
|
|
out_p[1..4].copy_from_slice(&in_p[1..4]);
|
|
out_p[0] = val;
|
|
},
|
|
);
|
|
}
|
|
_ => unreachable!(),
|
|
},
|
|
_ => unreachable!(),
|
|
};
|
|
|
|
Ok(gst::FlowSuccess::Ok)
|
|
}
|
|
}
|