mirror of
https://gitlab.freedesktop.org/dabrain34/GstPipelineStudio.git
synced 2024-05-15 23:02:41 +00:00
306 lines
12 KiB
Rust
306 lines
12 KiB
Rust
// 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 file is part of GstPipelineStudio
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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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use std::fmt::Write as _;
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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_factory_exists(element_name: &str) -> bool {
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match ElementInfo::element_feature(element_name) {
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Some(_feature) => {
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GPS_DEBUG!("Found element factory name {}", element_name);
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true
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}
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None => {
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GPS_ERROR!("Unable to find element factory name {}", element_name);
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false
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}
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}
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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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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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if !ElementInfo::element_factory_exists(element_name) {
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desc.push_str("<b>Factory details:</b>\n");
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desc.push_str("<b>Name:</b>");
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desc.push_str(element_name);
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desc.push('\n');
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desc.push('\n');
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desc.push_str("Factory unavailable.");
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} else {
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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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let _ = write!(desc, "{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));
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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()));
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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(>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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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()));
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desc.push('\n');
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}
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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: &gst::Element, property_name: &str) -> anyhow::Result<String> {
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let value = element.property_value(property_name);
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if value.type_().is_a(glib::Type::ENUM) {
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let value = value.get::<&glib::EnumValue>().unwrap().nick().to_string();
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Ok(value)
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} else if value.type_().is_a(glib::Type::FLAGS) {
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let value = value.get::<Vec<&glib::FlagsValue>>().unwrap();
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let flags = value.iter().copied().fold(0, |acc, val| acc | val.value());
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Ok(flags.to_string())
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} else if value.type_().is_a(glib::Type::F64) || value.type_().is_a(glib::Type::F32) {
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let value = value
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.transform::<String>()
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.expect("Unable to transform to string")
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.get::<String>()
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.unwrap()
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.replace(',', ".");
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Ok(value)
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} else {
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let value = value
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.transform::<String>()
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.expect("Unable to transform to string")
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.get::<String>()
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.unwrap_or_default()
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.to_lowercase();
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Ok(value)
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}
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}
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pub fn element_property_by_feature_name(
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element_name: &str,
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property_name: &str,
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) -> 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().build()?;
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ElementInfo::element_property(&element, property_name)
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}
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pub fn element_properties(
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element: &gst::Element,
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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 params = element.list_properties();
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for param in params.iter() {
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GPS_INFO!("Property_name {}", param.name());
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if param.flags().contains(glib::ParamFlags::READABLE) {
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match element.property_value(param.name()).transform::<String>() {
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Ok(value) => {
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GPS_INFO!(
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"Property_name {}={} type={:?}",
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param.name(),
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value.get::<String>().unwrap_or_default(),
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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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Err(_e) => {
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GPS_ERROR!("Unable to convert the param {} to string ", param.name())
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}
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}
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} else {
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GPS_ERROR!("The param {} is not readable", param.name())
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}
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}
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Ok(properties_list)
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}
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pub fn element_properties_by_feature_name(
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element_name: &str,
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) -> anyhow::Result<HashMap<String, glib::ParamSpec>> {
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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().build()?;
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ElementInfo::element_properties(&element)
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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()
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.build()
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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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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_for_element(bin: &gst::Bin, element_name: &str) -> Vec<gst::Element> {
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let mut iter = bin.iterate_elements();
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let mut elements: Vec<gst::Element> = Vec::new();
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elements = 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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let mut bin_elements = ElementInfo::search_for_element(&bin, element_name);
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elements.append(&mut bin_elements);
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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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|| element_name.is_empty()
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{
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GPS_INFO!("Found {}", element_name);
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elements.push(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 elements,
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}
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};
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elements
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}
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}
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