mirror of
https://gitlab.freedesktop.org/dabrain34/GstPipelineStudio.git
synced 2024-05-31 22:58:13 +00:00
222 lines
8.6 KiB
Rust
222 lines
8.6 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 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 gstreamer as gst;
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use std::collections::HashMap;
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#[derive(Debug, Eq, Ord, PartialEq, PartialOrd)]
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pub struct ElementInfo {
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pub name: Option<String>,
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plugin_name: Option<String>,
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rank: i32,
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}
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impl Default for ElementInfo {
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fn default() -> ElementInfo {
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ElementInfo {
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name: None,
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plugin_name: None,
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rank: -1,
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}
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}
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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 = Some(gst::PluginFeature::name(&feature).as_str().to_owned());
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element.plugin_name =
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Some(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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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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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>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.filename().unwrap().as_path().display().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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fn value_as_str(v: &glib::Value) -> Option<String> {
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match v.type_() {
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glib::Type::I8 => Some(str_some_value!(v, i8).to_string()),
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glib::Type::U8 => Some(str_some_value!(v, u8).to_string()),
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glib::Type::BOOL => Some(str_some_value!(v, bool).to_string()),
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glib::Type::I32 => Some(str_some_value!(v, i32).to_string()),
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glib::Type::U32 => Some(str_some_value!(v, u32).to_string()),
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glib::Type::I64 => Some(str_some_value!(v, i64).to_string()),
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glib::Type::U64 => Some(str_some_value!(v, u64).to_string()),
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glib::Type::F32 => Some(str_some_value!(v, f32).to_string()),
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glib::Type::F64 => Some(str_some_value!(v, f64).to_string()),
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glib::Type::STRING => str_opt_value!(v, String),
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_ => None,
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}
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}
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pub fn element_properties(element_name: &str) -> anyhow::Result<HashMap<String, String>> {
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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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GPS_INFO!("Property_name {}", param.name());
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if (param.flags() & glib::ParamFlags::READABLE) == glib::ParamFlags::READABLE
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|| (param.flags() & glib::ParamFlags::READWRITE) == glib::ParamFlags::READWRITE
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{
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let value = element.property::<String>(param.name());
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properties_list.insert(String::from(param.name()), value);
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} else if let Some(value) = ElementInfo::value_as_str(param.default_value()) {
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properties_list.insert(String::from(param.name()), value);
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} else {
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GPS_INFO!("Unable to add property_name {}", 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_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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pub fn element_supports_new_pad_request(element_name: &str, direction: PortDirection) -> bool {
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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 true;
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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 true;
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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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false
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}
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}
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