mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
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377 lines
13 KiB
Rust
377 lines
13 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_SHIFT: f32 = 0.0;
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const DEFAULT_SATURATION_MUL: f32 = 1.0;
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const DEFAULT_SATURATION_OFF: f32 = 0.0;
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const DEFAULT_VALUE_MUL: f32 = 1.0;
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const DEFAULT_VALUE_OFF: f32 = 0.0;
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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_shift: f32,
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saturation_mul: f32,
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saturation_off: f32,
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value_mul: f32,
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value_off: 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_shift: DEFAULT_HUE_SHIFT,
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saturation_mul: DEFAULT_SATURATION_MUL,
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saturation_off: DEFAULT_SATURATION_OFF,
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value_mul: DEFAULT_VALUE_MUL,
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value_off: DEFAULT_VALUE_OFF,
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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 HsvFilter {
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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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"hsvfilter",
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gst::DebugColorFlags::empty(),
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Some("Rust HSV transformation filter"),
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)
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});
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#[glib::object_subclass]
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impl ObjectSubclass for HsvFilter {
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const NAME: &'static str = "GstHsvFilter";
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type Type = super::HsvFilter;
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type ParentType = gst_video::VideoFilter;
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}
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impl HsvFilter {
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#[inline]
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fn hsv_filter<CF, FF>(
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&self,
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frame: &mut gst_video::video_frame::VideoFrameRef<&mut gst::buffer::BufferRef>,
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to_hsv: CF,
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apply_filter: FF,
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) where
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CF: Fn(&[u8]) -> [f32; 3],
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FF: Fn(&[f32; 3], &mut [u8]),
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{
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let settings = *self.settings.lock().unwrap();
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let width = frame.width() as usize;
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let stride = frame.plane_stride()[0] as usize;
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let nb_channels = frame.format_info().pixel_stride()[0] as usize;
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let data = frame.plane_data_mut(0).unwrap();
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assert_eq!(data.len() % nb_channels, 0);
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let line_bytes = width * nb_channels;
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for line in data.chunks_exact_mut(stride) {
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for p in line[..line_bytes].chunks_exact_mut(nb_channels) {
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assert_eq!(p.len(), nb_channels);
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let mut hsv = to_hsv(p);
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hsv[0] = (hsv[0] + settings.hue_shift) % 360.0;
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if hsv[0] < 0.0 {
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hsv[0] += 360.0;
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}
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hsv[1] = hsvutils::Clamp::clamp(
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settings.saturation_mul * hsv[1] + settings.saturation_off,
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0.0,
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1.0,
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);
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hsv[2] = hsvutils::Clamp::clamp(
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settings.value_mul * hsv[2] + settings.value_off,
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0.0,
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1.0,
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);
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apply_filter(&hsv, p);
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}
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}
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}
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}
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impl ObjectImpl for HsvFilter {
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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-shift")
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.nick("Hue shift")
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.blurb("Hue shifting in degrees")
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.default_value(DEFAULT_HUE_SHIFT)
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.mutable_playing()
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.build(),
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glib::ParamSpecFloat::builder("saturation-mul")
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.nick("Saturation multiplier")
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.blurb("Saturation multiplier to apply to the saturation value (before offset)")
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.default_value(DEFAULT_SATURATION_MUL)
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.mutable_playing()
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.build(),
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glib::ParamSpecFloat::builder("saturation-off")
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.nick("Saturation offset")
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.blurb("Saturation offset to add to the saturation value (after multiplier)")
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.default_value(DEFAULT_SATURATION_OFF)
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.mutable_playing()
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.build(),
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glib::ParamSpecFloat::builder("value-mul")
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.nick("Value multiplier")
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.blurb("Value multiplier to apply to the value (before offset)")
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.default_value(DEFAULT_VALUE_MUL)
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.mutable_playing()
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.build(),
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glib::ParamSpecFloat::builder("value-off")
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.nick("Value offset")
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.blurb("Value offset to add to the value (after multiplier)")
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.default_value(DEFAULT_VALUE_OFF)
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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-shift" => {
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let mut settings = self.settings.lock().unwrap();
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let hue_shift = 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-shift from {} to {}",
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settings.hue_shift,
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hue_shift
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);
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settings.hue_shift = hue_shift;
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}
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"saturation-mul" => {
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let mut settings = self.settings.lock().unwrap();
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let saturation_mul = 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-mul from {} to {}",
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settings.saturation_mul,
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saturation_mul
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);
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settings.saturation_mul = saturation_mul;
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}
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"saturation-off" => {
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let mut settings = self.settings.lock().unwrap();
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let saturation_off = 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-off from {} to {}",
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settings.saturation_off,
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saturation_off
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);
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settings.saturation_off = saturation_off;
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}
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"value-mul" => {
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let mut settings = self.settings.lock().unwrap();
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let value_mul = 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-mul from {} to {}",
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settings.value_mul,
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value_mul
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);
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settings.value_mul = value_mul;
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}
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"value-off" => {
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let mut settings = self.settings.lock().unwrap();
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let value_off = 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-off from {} to {}",
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settings.value_off,
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value_off
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);
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settings.value_off = value_off;
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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-shift" => {
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let settings = self.settings.lock().unwrap();
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settings.hue_shift.to_value()
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}
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"saturation-mul" => {
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let settings = self.settings.lock().unwrap();
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settings.saturation_mul.to_value()
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}
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"saturation-off" => {
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let settings = self.settings.lock().unwrap();
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settings.saturation_off.to_value()
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}
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"value-mul" => {
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let settings = self.settings.lock().unwrap();
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settings.value_mul.to_value()
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}
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"value-off" => {
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let settings = self.settings.lock().unwrap();
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settings.value_off.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 HsvFilter {}
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impl ElementImpl for HsvFilter {
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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 filter",
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"Filter/Effect/Converter/Video",
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"Works within the HSV colorspace to apply transformations to incoming frames",
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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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// src pad capabilities
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let caps = gst_video::VideoCapsBuilder::new()
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.format_list([
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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::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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gst_video::VideoFormat::Rgb,
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gst_video::VideoFormat::Bgr,
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])
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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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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 HsvFilter {
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const MODE: gst_base::subclass::BaseTransformMode =
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gst_base::subclass::BaseTransformMode::AlwaysInPlace;
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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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}
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impl VideoFilterImpl for HsvFilter {
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fn transform_frame_ip(
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&self,
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frame: &mut gst_video::VideoFrameRef<&mut gst::BufferRef>,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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match frame.format() {
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gst_video::VideoFormat::Rgbx
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| gst_video::VideoFormat::Rgba
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| gst_video::VideoFormat::Rgb => {
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self.hsv_filter(
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frame,
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|p| hsvutils::from_rgb(p[..3].try_into().expect("slice with incorrect length")),
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|hsv, p| {
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p[..3].copy_from_slice(&hsvutils::to_rgb(hsv));
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},
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);
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}
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gst_video::VideoFormat::Xrgb | gst_video::VideoFormat::Argb => {
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self.hsv_filter(
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frame,
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|p| {
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hsvutils::from_rgb(p[1..4].try_into().expect("slice with incorrect length"))
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},
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|hsv, p| {
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p[1..4].copy_from_slice(&hsvutils::to_rgb(hsv));
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},
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);
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}
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gst_video::VideoFormat::Bgrx
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| gst_video::VideoFormat::Bgra
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| gst_video::VideoFormat::Bgr => {
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self.hsv_filter(
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frame,
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|p| hsvutils::from_bgr(p[..3].try_into().expect("slice with incorrect length")),
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|hsv, p| {
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p[..3].copy_from_slice(&hsvutils::to_bgr(hsv));
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},
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);
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}
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gst_video::VideoFormat::Xbgr | gst_video::VideoFormat::Abgr => {
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self.hsv_filter(
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frame,
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|p| {
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hsvutils::from_bgr(p[1..4].try_into().expect("slice with incorrect length"))
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},
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|hsv, p| {
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p[1..4].copy_from_slice(&hsvutils::to_bgr(hsv));
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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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Ok(gst::FlowSuccess::Ok)
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}
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}
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