gstpreview01
This commit is contained in:
12
Cargo.toml
12
Cargo.toml
@@ -6,11 +6,12 @@ members = [
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"poc002",
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"poc003",
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"poc004",
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"poc005",
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]
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resolver = "3"
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[workspace.package]
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version = "0.4.0"
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version = "0.5.0"
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edition = "2024"
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license = "MIT"
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repository = "https://git.sasedev.com/Sasedev/poc-qt"
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@@ -21,9 +22,18 @@ cxx = { version = "^1", features = ["c++14", "c++17", "c++20"] }
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cxx-qt = { version = "^0.8", features = [] }
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cxx-qt-build = { version = "^0.8", features = ["link_qt_object_files"] }
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cxx-qt-lib = { version = "^0.8", features = ["full", "link_qt_object_files"] }
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glib = { version = "^0.22", features = [] }
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gstreamer = { version = "^0.25", features = ["serde"] }
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gstreamer-app = { version = "^0.25", features = [] }
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gstreamer-video = { version = "^0.25", features = ["serde"] }
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jsonschema = { version = "^0.40", features = [] }
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serde = { version = "^1.0", features = ["derive"] }
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serde_json = { version = "^1.0", features = [] }
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tokio = { version = "^1.50", features = ["full"] }
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tokio-tungstenite = { version = "^0.29", features = ["rustls", "tokio-rustls", "url"] }
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tracing = { version = "^0.1", features = ["async-await", "log"] }
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tracing-subscriber = { version = "^0.3", features = ["ansi", "env-filter", "chrono", "serde", "json"] }
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webrtc = { version = "^0.17", features = [] }
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[profile.dev]
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incremental = true # Compile your binary in smaller steps.
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24
poc005/Cargo.toml
Normal file
24
poc005/Cargo.toml
Normal file
@@ -0,0 +1,24 @@
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# file: poc-qt/poc005/Cargo.toml
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[package]
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name = "poc-qt005"
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version = "0.5.0"
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edition.workspace = true
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license.workspace = true
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authors.workspace = true
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[build-dependencies]
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cxx-qt-build = { workspace = true, features = ["link_qt_object_files"] }
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jsonschema = { workspace = true, features = [] }
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serde = { workspace = true, features = ["derive"] }
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serde_json = { workspace = true, features = [] }
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[dependencies]
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cxx = { workspace = true, features = [] }
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cxx-qt = { workspace = true, features = [] }
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cxx-qt-lib = { workspace = true, features = ["full", "link_qt_object_files"] }
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glib = { workspace = true, features = [] }
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gstreamer = { workspace = true, features = ["serde"] }
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gstreamer-app = { workspace = true, features = [] }
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gstreamer-video = { workspace = true, features = ["serde"] }
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298
poc005/build.rs
Normal file
298
poc005/build.rs
Normal file
@@ -0,0 +1,298 @@
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// file: poc-qt/poc005/build.rs
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use std::collections::BTreeMap;
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use std::fs;
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use std::path::{Path, PathBuf};
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use cxx_qt_build::{CxxQtBuilder, QmlModule};
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use serde::Deserialize;
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use serde_json::Value;
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const DEFAULT_CONFIG_STR: &str = include_str!("build_config.default.json");
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const CONFIG_SCHEMA_STR: &str = include_str!("../build_config.schema.json");
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#[derive(Debug, Deserialize)]
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struct BuildConfig {
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active_profile: String,
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profiles: BTreeMap<String, BuildProfile>,
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}
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#[derive(Debug, Deserialize)]
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struct BuildProfile {
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qt: QtConfig,
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link: LinkConfig,
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}
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#[derive(Debug, Deserialize)]
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struct QtConfig {
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qmake: String,
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lib_dir: String,
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qml_dir: String,
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plugins_dir: String,
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version_major: u8,
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}
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#[derive(Debug, Deserialize)]
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struct LinkConfig {
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rpaths: Vec<String>,
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}
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fn ensure_user_config_exists(config_path: &Path) {
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if config_path.exists() {
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return;
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}
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match fs::write(config_path, DEFAULT_CONFIG_STR) {
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Ok(()) => {
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println!(
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"cargo:warning=build_config.json was missing and has been created from build_config.default.json"
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);
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}
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Err(err) => {
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panic!(
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"failed to create {} from embedded defaults: {}",
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config_path.display(),
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err
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);
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}
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}
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}
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fn validate_embedded_schema() {
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let schema_json = parse_json_str(CONFIG_SCHEMA_STR, "embedded build_config.schema.json");
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match jsonschema::meta::validate(&schema_json) {
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Ok(()) => {}
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Err(err) => {
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panic!("embedded build_config.schema.json is not a valid JSON Schema: {err}");
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}
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}
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}
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fn validate_default_config() {
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validate_config_str_against_schema(DEFAULT_CONFIG_STR, "embedded build_config.default.json");
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}
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fn validate_user_config(config_path: &Path) {
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let raw = match fs::read_to_string(config_path) {
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Ok(v) => v,
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Err(err) => {
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panic!("failed to read {}: {}", config_path.display(), err);
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}
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};
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validate_config_str_against_schema(&raw, &format!("{}", config_path.display()));
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}
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fn validate_config_str_against_schema(config_raw: &str, config_name: &str) {
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let schema_json = parse_json_str(CONFIG_SCHEMA_STR, "embedded build_config.schema.json");
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let config_json = parse_json_str(config_raw, config_name);
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let validator = match jsonschema::validator_for(&schema_json) {
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Ok(v) => v,
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Err(err) => {
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panic!(
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"failed to build JSON Schema validator for {}: {}",
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config_name, err
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);
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}
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};
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if validator.is_valid(&config_json) {
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return;
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}
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let mut errors = Vec::new();
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for err in validator.iter_errors(&config_json) {
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errors.push(format!(
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"- {} at instance path {}",
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err,
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err.instance_path()
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));
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}
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let joined = errors.join("\n");
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panic!("{} failed schema validation:\n{}", config_name, joined);
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}
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fn load_build_config(config_path: &Path) -> BuildConfig {
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let raw = match fs::read_to_string(config_path) {
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Ok(v) => v,
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Err(err) => {
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panic!("failed to read {}: {}", config_path.display(), err);
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}
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};
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match serde_json::from_str::<BuildConfig>(&raw) {
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Ok(v) => v,
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Err(err) => {
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panic!(
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"failed to deserialize {} into BuildConfig: {}",
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config_path.display(),
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err
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);
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}
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}
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}
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fn resolve_profile_name(build_config: &BuildConfig) -> String {
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let env_profile = std::env::var("BUILD_CONFIG_PROFILE");
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match env_profile {
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Ok(v) => {
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if v.trim().is_empty() {
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build_config.active_profile.clone()
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} else {
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v
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}
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}
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Err(_) => build_config.active_profile.clone(),
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}
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}
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fn resolve_profile<'a>(build_config: &'a BuildConfig, profile_name: &str) -> &'a BuildProfile {
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match build_config.profiles.get(profile_name) {
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Some(v) => v,
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None => {
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let mut available = Vec::new();
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for key in build_config.profiles.keys() {
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available.push(key.clone());
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}
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panic!(
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"active profile '{}' not found in build_config.json. available profiles: {}",
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profile_name,
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available.join(", ")
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);
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}
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}
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}
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fn validate_profile_paths(profile: &BuildProfile, profile_name: &str) {
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ensure_existing_file(&profile.qt.qmake, profile_name, "qt.qmake");
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ensure_existing_dir(&profile.qt.lib_dir, profile_name, "qt.lib_dir");
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ensure_existing_dir(&profile.qt.qml_dir, profile_name, "qt.qml_dir");
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ensure_existing_dir(&profile.qt.plugins_dir, profile_name, "qt.plugins_dir");
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let mut index = 0usize;
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while index < profile.link.rpaths.len() {
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ensure_existing_dir(
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&profile.link.rpaths[index],
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profile_name,
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&format!("link.rpaths[{index}]"),
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);
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index += 1;
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}
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}
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fn ensure_existing_file(path_str: &str, profile_name: &str, field_name: &str) {
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let path = Path::new(path_str);
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if !path.exists() {
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panic!(
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"profile '{}' has invalid {}: path does not exist: {}",
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profile_name,
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field_name,
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path.display()
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);
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}
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if !path.is_file() {
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panic!(
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"profile '{}' has invalid {}: path is not a file: {}",
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profile_name,
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field_name,
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path.display()
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);
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}
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}
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fn ensure_existing_dir(path_str: &str, profile_name: &str, field_name: &str) {
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let path = Path::new(path_str);
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if !path.exists() {
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panic!(
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"profile '{}' has invalid {}: path does not exist: {}",
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profile_name,
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field_name,
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path.display()
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);
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}
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if !path.is_dir() {
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panic!(
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"profile '{}' has invalid {}: path is not a directory: {}",
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profile_name,
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field_name,
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path.display()
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);
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}
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}
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fn apply_build_environment(profile: &BuildProfile) {
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unsafe {
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std::env::set_var("QMAKE", &profile.qt.qmake);
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std::env::set_var("QT_VERSION_MAJOR", profile.qt.version_major.to_string());
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}
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println!("cargo:rerun-if-env-changed=BUILD_CONFIG_PROFILE");
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println!("cargo:rerun-if-env-changed=QMAKE");
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println!("cargo:rerun-if-env-changed=QT_VERSION_MAJOR");
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}
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fn apply_linker_settings(profile: &BuildProfile) {
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let mut index = 0usize;
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while index < profile.link.rpaths.len() {
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println!(
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"cargo:rustc-link-arg=-Wl,-rpath,{}",
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profile.link.rpaths[index]
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);
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index += 1;
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}
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}
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fn emit_runtime_hints(profile: &BuildProfile, profile_name: &str) {
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println!(
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"cargo:warning=using build profile '{}' with qmake '{}'",
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profile_name, profile.qt.qmake
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);
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println!(
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"cargo:warning=qt lib_dir='{}', qml_dir='{}', plugins_dir='{}'",
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profile.qt.lib_dir, profile.qt.qml_dir, profile.qt.plugins_dir
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);
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}
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fn parse_json_str(raw: &str, label: &str) -> Value {
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match serde_json::from_str::<Value>(raw) {
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Ok(v) => v,
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Err(err) => {
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panic!("failed to parse {} as JSON: {}", label, err);
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}
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}
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}
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fn main() {
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println!("cargo:rerun-if-changed=build.rs");
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println!("cargo:rerun-if-changed=build_config.default.json");
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println!("cargo:rerun-if-changed=build_config.schema.json");
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println!("cargo:rerun-if-changed=src/bridge.rs");
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println!("cargo:rerun-if-changed=qml/main.qml");
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let config_path = PathBuf::from("build_config.json");
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ensure_user_config_exists(&config_path);
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validate_embedded_schema();
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validate_default_config();
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validate_user_config(&config_path);
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let build_config = load_build_config(&config_path);
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let profile_name = resolve_profile_name(&build_config);
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let profile = resolve_profile(&build_config, &profile_name);
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validate_profile_paths(profile, &profile_name);
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apply_build_environment(profile);
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apply_linker_settings(profile);
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|
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CxxQtBuilder::new_qml_module(QmlModule::new("com.sasedev.gstpreview01").qml_files(["qml/main.qml"]))
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.qt_module("Core")
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.qt_module("Qml")
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.qt_module("Network")
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.files(["src/bridge.rs"])
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.build();
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emit_runtime_hints(profile, &profile_name);
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}
|
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33
poc005/build_config.default.json
Normal file
33
poc005/build_config.default.json
Normal file
@@ -0,0 +1,33 @@
|
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{
|
||||
"active_profile": "sinus",
|
||||
"profiles": {
|
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"sinus": {
|
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"qt": {
|
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"qmake": "/home/sinus/DEV/Qt/6.11.0/gcc_64/bin/qmake",
|
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"lib_dir": "/home/sinus/DEV/Qt/6.11.0/gcc_64/lib",
|
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"qml_dir": "/home/sinus/DEV/Qt/6.11.0/gcc_64/qml",
|
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"plugins_dir": "/home/sinus/DEV/Qt/6.11.0/gcc_64/plugins",
|
||||
"version_major": 6
|
||||
},
|
||||
"link": {
|
||||
"rpaths": [
|
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"/home/sinus/DEV/Qt/6.11.0/gcc_64/lib"
|
||||
]
|
||||
}
|
||||
},
|
||||
"system": {
|
||||
"qt": {
|
||||
"qmake": "/usr/bin/qmake6",
|
||||
"lib_dir": "/usr/lib/x86_64-linux-gnu",
|
||||
"qml_dir": "/usr/lib/x86_64-linux-gnu/qt6/qml",
|
||||
"plugins_dir": "/usr/lib/x86_64-linux-gnu/qt6/plugins",
|
||||
"version_major": 6
|
||||
},
|
||||
"link": {
|
||||
"rpaths": [
|
||||
"/usr/lib/x86_64-linux-gnu"
|
||||
]
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
38
poc005/qml/main.qml
Normal file
38
poc005/qml/main.qml
Normal file
@@ -0,0 +1,38 @@
|
||||
// file: poc-qt/poc005/qml/main.qml
|
||||
|
||||
import QtQuick
|
||||
import QtQuick.Controls
|
||||
import QtQuick.Layouts
|
||||
import com.sasedev.gstpreview01
|
||||
|
||||
ApplicationWindow {
|
||||
visible: true
|
||||
width: 600
|
||||
height: 300
|
||||
title: "POC005 - GStreamer Rust"
|
||||
|
||||
GstController {
|
||||
id: gstController
|
||||
}
|
||||
|
||||
ColumnLayout {
|
||||
anchors.centerIn: parent
|
||||
spacing: 12
|
||||
|
||||
Button {
|
||||
text: "Start webcam (GStreamer)"
|
||||
enabled: !gstController.started
|
||||
onClicked: gstController.startPreview()
|
||||
}
|
||||
|
||||
Button {
|
||||
text: "Stop"
|
||||
enabled: gstController.started
|
||||
onClicked: gstController.stopPreview()
|
||||
}
|
||||
|
||||
Label {
|
||||
text: gstController.started ? "Started" : "Stopped"
|
||||
}
|
||||
}
|
||||
}
|
||||
80
poc005/src/bridge.rs
Normal file
80
poc005/src/bridge.rs
Normal file
@@ -0,0 +1,80 @@
|
||||
// file: poc-qt/poc005/src/bridge.rs
|
||||
|
||||
use core::pin::Pin;
|
||||
use gstreamer as gst;
|
||||
use gstreamer::prelude::*;
|
||||
|
||||
#[derive(Default)]
|
||||
pub struct GstControllerRust {
|
||||
started: bool,
|
||||
}
|
||||
|
||||
#[cxx_qt::bridge]
|
||||
pub mod qobject {
|
||||
extern "RustQt" {
|
||||
#[qobject]
|
||||
#[qml_element]
|
||||
#[qproperty(bool, started)]
|
||||
type GstController = super::GstControllerRust;
|
||||
|
||||
#[qinvokable]
|
||||
#[cxx_name = "startPreview"]
|
||||
fn start_preview(self: Pin<&mut GstController>);
|
||||
|
||||
#[qinvokable]
|
||||
#[cxx_name = "stopPreview"]
|
||||
fn stop_preview(self: Pin<&mut GstController>);
|
||||
}
|
||||
}
|
||||
|
||||
impl qobject::GstController {
|
||||
pub fn start_preview(self: Pin<&mut Self>) {
|
||||
if *self.started() {
|
||||
println!("preview already started");
|
||||
return;
|
||||
}
|
||||
|
||||
if let Err(err) = gst::init() {
|
||||
eprintln!("gst init failed: {err}");
|
||||
return;
|
||||
}
|
||||
|
||||
let pipeline_str = "v4l2src ! videoconvert ! fakesink";
|
||||
|
||||
let element = match gst::parse::launch(pipeline_str) {
|
||||
Ok(v) => v,
|
||||
Err(err) => {
|
||||
eprintln!("failed to parse pipeline: {err}");
|
||||
return;
|
||||
}
|
||||
};
|
||||
|
||||
let pipeline: gst::Pipeline = match element.downcast::<gst::Pipeline>() {
|
||||
Ok(v) => v,
|
||||
Err(_) => {
|
||||
eprintln!("parsed element is not a gst::Pipeline");
|
||||
return;
|
||||
}
|
||||
};
|
||||
|
||||
match pipeline.set_state(gst::State::Playing) {
|
||||
Ok(_) => {
|
||||
println!("pipeline started");
|
||||
self.set_started(true);
|
||||
}
|
||||
Err(err) => {
|
||||
eprintln!("failed to set pipeline to Playing: {err:?}");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub fn stop_preview(self: Pin<&mut Self>) {
|
||||
if !*self.started() {
|
||||
println!("preview already stopped");
|
||||
return;
|
||||
}
|
||||
|
||||
self.set_started(false);
|
||||
println!("pipeline stop requested");
|
||||
}
|
||||
}
|
||||
51
poc005/src/main.rs
Normal file
51
poc005/src/main.rs
Normal file
@@ -0,0 +1,51 @@
|
||||
// file: poc-qt/poc005/src/main.rs
|
||||
|
||||
mod bridge;
|
||||
|
||||
use cxx_qt_lib::{QGuiApplication, QQmlApplicationEngine, QString, QUrl};
|
||||
use std::env;
|
||||
use std::path::PathBuf;
|
||||
|
||||
fn main() {
|
||||
let mut app = QGuiApplication::new();
|
||||
let mut engine = QQmlApplicationEngine::new();
|
||||
|
||||
let current_dir = match env::current_dir() {
|
||||
Ok(v) => v,
|
||||
Err(err) => {
|
||||
eprintln!("failed to get current_dir: {err}");
|
||||
return;
|
||||
}
|
||||
};
|
||||
|
||||
let qml_path: PathBuf = current_dir.join("qml/main.qml");
|
||||
let qml_path = match qml_path.canonicalize() {
|
||||
Ok(v) => v,
|
||||
Err(err) => {
|
||||
eprintln!("failed to resolve qml/main.qml: {err}");
|
||||
return;
|
||||
}
|
||||
};
|
||||
|
||||
let qml_path_str = match qml_path.to_str() {
|
||||
Some(v) => v.to_string(),
|
||||
None => {
|
||||
eprintln!("qml path is not valid UTF-8: {}", qml_path.display());
|
||||
return;
|
||||
}
|
||||
};
|
||||
|
||||
println!("loading qml from: {}", qml_path_str);
|
||||
|
||||
if let Some(engine_ref) = engine.as_mut() {
|
||||
let url = QUrl::from_local_file(&QString::from(qml_path_str));
|
||||
engine_ref.load(&url);
|
||||
} else {
|
||||
eprintln!("failed to create QQmlApplicationEngine");
|
||||
return;
|
||||
}
|
||||
|
||||
if let Some(app_ref) = app.as_mut() {
|
||||
app_ref.exec();
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user