2022-01-18 15:03:34 +00:00
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// element.rs
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//
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// Copyright 2022 Stéphane Cerveau <scerveau@collabora.com>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// SPDX-License-Identifier: GPL-3.0-only
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use crate::gps::PadInfo;
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use crate::graphmanager::{NodeType, PortDirection, PortPresence};
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use crate::logger;
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use crate::GPS_INFO;
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use gst::glib;
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use gst::prelude::*;
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use std::collections::HashMap;
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2022-01-19 15:03:19 +00:00
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#[derive(Debug, Default, Eq, Ord, PartialEq, PartialOrd)]
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pub struct ElementInfo {
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pub name: String,
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plugin_name: String,
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rank: i32,
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}
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impl ElementInfo {
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pub fn elements_list() -> anyhow::Result<Vec<ElementInfo>> {
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let registry = gst::Registry::get();
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let mut elements: Vec<ElementInfo> = Vec::new();
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let plugins = gst::Registry::plugins(®istry);
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for plugin in plugins {
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let plugin_name = gst::Plugin::plugin_name(&plugin);
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let features = gst::Registry::features_by_plugin(®istry, &plugin_name);
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for feature in features {
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let mut element = ElementInfo::default();
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if let Ok(factory) = feature.downcast::<gst::ElementFactory>() {
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let feature = factory.upcast::<gst::PluginFeature>();
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element.name = gst::PluginFeature::name(&feature).as_str().to_owned();
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element.plugin_name = gst::Plugin::plugin_name(&plugin).as_str().to_owned();
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elements.push(element);
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}
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}
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}
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elements.sort();
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Ok(elements)
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}
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pub fn element_feature(element_name: &str) -> Option<gst::PluginFeature> {
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let registry = gst::Registry::get();
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gst::Registry::find_feature(®istry, element_name, gst::ElementFactory::static_type())
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}
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2022-01-28 14:24:30 +00:00
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pub fn element_update_rank(element_name: &str, rank: gst::Rank) {
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let feature: Option<gst::PluginFeature> = ElementInfo::element_feature(element_name);
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if let Some(feature) = feature {
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feature.set_rank(rank);
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}
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}
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pub fn element_description(element_name: &str) -> anyhow::Result<String> {
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let mut desc = String::from("");
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let feature = ElementInfo::element_feature(element_name)
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.ok_or_else(|| glib::bool_error!("Failed get element feature"))?;
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let rank = feature.rank();
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if let Ok(factory) = feature.downcast::<gst::ElementFactory>() {
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desc.push_str("<b>Factory details:</b>\n");
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desc.push_str("<b>Rank:</b>");
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desc.push_str(&format!("{:?}", rank));
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desc.push('\n');
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desc.push_str("<b>Name:</b>");
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desc.push_str(&factory.name());
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desc.push('\n');
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let element_keys = factory.metadata_keys();
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for key in element_keys {
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let val = factory.metadata(&key);
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if let Some(val) = val {
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desc.push_str("<b>");
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desc.push_str(&key);
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desc.push_str("</b>:");
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desc.push_str(>k::glib::markup_escape_text(val).to_string());
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desc.push('\n');
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}
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}
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let feature = factory.upcast::<gst::PluginFeature>();
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let plugin = gst::PluginFeature::plugin(&feature);
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if let Some(plugin) = plugin {
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desc.push('\n');
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desc.push_str("<b>Plugin details:</b>");
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desc.push('\n');
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desc.push_str("<b>Name:");
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desc.push_str("</b>");
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desc.push_str(gst::Plugin::plugin_name(&plugin).as_str());
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desc.push('\n');
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desc.push_str("<b>Description:");
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desc.push_str("</b>");
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desc.push_str(>k::glib::markup_escape_text(&plugin.description()).to_string());
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desc.push('\n');
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desc.push_str("<b>Filename:");
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desc.push_str("</b>");
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desc.push_str(
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>k::glib::markup_escape_text(
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&plugin
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.filename()
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.unwrap_or_default()
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.as_path()
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.display()
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.to_string(),
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)
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.to_string(),
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);
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desc.push('\n');
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desc.push_str("<b>Version:");
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desc.push_str("</b>");
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desc.push_str(>k::glib::markup_escape_text(&plugin.version()).to_string());
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desc.push('\n');
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}
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}
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Ok(desc)
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}
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pub fn element_type(element_name: &str) -> NodeType {
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let (inputs, outputs) = PadInfo::pads(element_name, true);
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let mut element_type = NodeType::Source;
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if !inputs.is_empty() {
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if !outputs.is_empty() {
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element_type = NodeType::Transform;
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} else {
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element_type = NodeType::Sink;
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}
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} else if !outputs.is_empty() {
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element_type = NodeType::Source;
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}
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element_type
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}
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pub fn element_property(element_name: &str, property_name: &str) -> anyhow::Result<String> {
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let feature = ElementInfo::element_feature(element_name).expect("Unable to get feature");
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let factory = feature
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.downcast::<gst::ElementFactory>()
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.expect("Unable to get the factory from the feature");
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let element = factory.create(None)?;
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let value = element
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.try_property::<String>(property_name)
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.unwrap_or_default();
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Ok(value)
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}
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pub fn element_properties(
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element_name: &str,
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) -> anyhow::Result<HashMap<String, glib::ParamSpec>> {
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let mut properties_list = HashMap::new();
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let feature = ElementInfo::element_feature(element_name).expect("Unable to get feature");
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let factory = feature
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.downcast::<gst::ElementFactory>()
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.expect("Unable to get the factory from the feature");
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let element = factory.create(None)?;
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let params = element.class().list_properties();
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for param in params.iter() {
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let value = element
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.try_property::<String>(param.name())
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.unwrap_or_default();
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GPS_INFO!(
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"Property_name {}={} type={:?}",
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param.name(),
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value,
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param.type_()
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);
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properties_list.insert(String::from(param.name()), param.clone());
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}
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Ok(properties_list)
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}
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pub fn element_is_uri_src_handler(element_name: &str) -> bool {
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let feature = ElementInfo::element_feature(element_name).expect("Unable to get feature");
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let factory = feature
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.downcast::<gst::ElementFactory>()
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.expect("Unable to get the factory from the feature");
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let element = factory
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.create(None)
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.expect("Unable to create an element from the feature");
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match element.dynamic_cast::<gst::URIHandler>() {
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Ok(uri_handler) => uri_handler.uri_type() == gst::URIType::Src,
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Err(_e) => false,
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}
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}
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2022-01-24 13:28:42 +00:00
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pub fn element_supports_new_pad_request(
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element_name: &str,
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direction: PortDirection,
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) -> Option<PadInfo> {
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let (inputs, outputs) = PadInfo::pads(element_name, true);
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if direction == PortDirection::Input {
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for input in inputs {
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if input.presence() == PortPresence::Sometimes {
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return Some(input);
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}
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}
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} else if direction == PortDirection::Output {
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for output in outputs {
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if output.presence() == PortPresence::Sometimes {
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return Some(output);
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}
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}
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} else {
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GPS_ERROR!("Port direction unknown");
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}
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None
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}
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pub fn search_fo_element(bin: &gst::Bin, element_name: &str) -> Option<gst::Element> {
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let mut iter = bin.iterate_elements();
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let element = loop {
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match iter.next() {
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Ok(Some(element)) => {
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if element.is::<gst::Bin>() {
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let bin = element.dynamic_cast::<gst::Bin>().unwrap();
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break ElementInfo::search_fo_element(&bin, element_name);
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} else {
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GPS_INFO!("Found factory: {}", element.factory().unwrap().name());
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if element.factory().unwrap().name() == element_name {
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GPS_INFO!("Found {}", element_name);
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break Some(element);
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}
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}
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}
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Err(gst::IteratorError::Resync) => iter.resync(),
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_ => break None,
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}
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};
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element
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}
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}
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