├── .gitignore
├── Cargo.lock
├── Cargo.toml
├── README.md
├── build.rs
├── examples
    ├── filepub.rs
    └── videopub.rs
├── src
    ├── lib.rs
    └── moqpublisher
    │   ├── imp.rs
    │   └── mod.rs
├── tests
    └── moqpublisher.rs
└── work_plan.md


/.gitignore:
--------------------------------------------------------------------------------
 1 | /target
 2 | *~
 3 | *.bk
 4 | *.swp
 5 | .DS_Store
 6 | .vscode
 7 | builddir
 8 | .meson-subproject-wrap-hash.txt
 9 | .aider*
10 | 
11 | 


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--------------------------------------------------------------------------------
/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "gst-moq"
 3 | authors = ["Rafael Caricio <rafael@caricio.com>"]
 4 | version = "0.1.0"
 5 | edition = "2021"
 6 | license = "MPL-2.0"
 7 | publish = ["crates-io"]
 8 | 
 9 | [dependencies]
10 | gst = { package = "gstreamer", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs", branch = "main" }
11 | gst-app = { package = "gstreamer-app", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs", branch = "main" }
12 | gst-audio = { package = "gstreamer-audio", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs", branch = "main" }
13 | gst-base = { package = "gstreamer-base", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs", branch = "main", features = ["v1_22"] }
14 | gst-video = { package = "gstreamer-video", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs", branch = "main" }
15 | gst-pbutils = { package = "gstreamer-pbutils", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs", branch = "main", features = ["v1_20"] }
16 | tokio = { version = "1.36.0", default-features = false, features = ["time", "rt-multi-thread", "macros"] }
17 | futures = "0.3.30"
18 | quinn = { version = "0.11.5", default-features = false, features = ["ring", "rustls", "runtime-tokio", "log"] }
19 | quinn-proto ={ version = "0.11.8", default-features = false, features = ["rustls", "log"] }
20 | rustls = { version = "0.23", default-features = false, features = ["std"] }
21 | rustls-pemfile = "2"
22 | rustls-pki-types = "1"
23 | bytes = "1.5.0"
24 | thiserror = "2"
25 | web-transport-quinn = "0.3.3"
26 | url = "2.5.2"
27 | once_cell = "1.20.2"
28 | http = "1.1"
29 | moq-transport = { git = "https://github.com/englishm/moq-rs.git", rev = "ebc843de8504e37d36c3134a1181513ebdf7a34a" }
30 | moq-catalog = { git = "https://github.com/englishm/moq-rs.git", rev = "ebc843de8504e37d36c3134a1181513ebdf7a34a" }
31 | moq-native-ietf = { git = "https://github.com/englishm/moq-rs.git", rev = "ebc843de8504e37d36c3134a1181513ebdf7a34a" }
32 | serde_json = "1.0"
33 | anyhow = "1.0"
34 | 
35 | [dev-dependencies]
36 | clap = { version = "4", features = ["derive"] }
37 | ctrlc = "3.4"
38 | env_logger = "0.11"
39 | 
40 | [profile.release]
41 | lto = "thin"
42 | opt-level = 3
43 | debug = true
44 | panic = "unwind"
45 | 
46 | [profile.dev]
47 | opt-level = 1
48 | lto = "off"
49 | 
50 | [lib]
51 | name = "gstmoq"
52 | crate-type = ["cdylib", "rlib"]
53 | path = "src/lib.rs"
54 | 
55 | [build-dependencies]
56 | gst-plugin-version-helper = "0.8.1"
57 | 
58 | [features]
59 | static = []
60 | capi = []
61 | doc = []
62 | 
63 | [package.metadata.capi]
64 | min_version = "0.9.21"
65 | 
66 | [package.metadata.capi.header]
67 | enabled = false
68 | 
69 | [package.metadata.capi.library]
70 | install_subdir = "gstreamer-1.0"
71 | versioning = false
72 | import_library = false
73 | 
74 | [package.metadata.capi.pkg_config]
75 | requires_private = "gstreamer-1.0, gstreamer-base-1.0, gobject-2.0, glib-2.0"
76 | 
77 | [[example]]
78 | name = "videopub"
79 | path = "examples/videopub.rs"
80 | required-features = []
81 | 
82 | [[example]]
83 | name = "filepub"
84 | path = "examples/filepub.rs"
85 | required-features = []
86 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | # GStreamer MoQ Publisher Plugin
  2 | 
  3 | A GStreamer plugin that implements a Media over QUIC (MoQ) publisher element. This element allows publishing live media streams to MoQ relay servers using the WebTransport protocol.
  4 | 
  5 | ## Overview
  6 | 
  7 | The `moqpublisher` element is a bin element that accepts video and/or audio input streams and publishes them to a MoQ relay server. It handles:
  8 | 
  9 | - WebTransport connection management
 10 | - CMAF packaging of media streams
 11 | - MoQ catalog generation and updates
 12 | - Track management and prioritization
 13 | - Init segment handling
 14 | 
 15 | ## Installation
 16 | 
 17 | ### Prerequisites
 18 | 
 19 | - Rust toolchain (latest stable version)
 20 | - GStreamer development files (>= 1.22)
 21 | - pkg-config
 22 | 
 23 | ### Building
 24 | 
 25 | ```bash
 26 | cargo build --release
 27 | ```
 28 | 
 29 | ## Element Properties
 30 | 
 31 | - `url` (string): The WebTransport URL of the MoQ relay server
 32 | - `namespace` (string): The namespace for the published tracks (default: "default")
 33 | - `fragment-duration` (uint64): Duration of each media fragment in milliseconds (default: 2000)
 34 | - `certificate-file` (string): Optional path to TLS certificate file for the WebTransport connection
 35 | 
 36 | ## Pad Properties
 37 | 
 38 | Each sink pad supports the following properties via a "track-settings" structure:
 39 | 
 40 | - `track-name` (string): Name of the track in the MoQ catalog
 41 | - `priority` (uint8): Priority value for the track's fragments (0-255, default: 127)
 42 | 
 43 | ## Internal Architecture
 44 | 
 45 | The element works by:
 46 | 
 47 | 1. Creating a bin containing cmafmux and appsink elements for each input pad
 48 | 2. Using cmafmux to package incoming media into CMAF fragments
 49 | 3. Processing CMAF fragments into MoQ groups and objects
 50 | 4. Managing WebTransport connections to the relay server
 51 | 5. Generating and updating the MoQ catalog based on media capabilities
 52 | 6. Publishing media tracks with proper prioritization
 53 | 
 54 | ## Example Usage
 55 | 
 56 | The repository includes a video publishing example that can be run with:
 57 | 
 58 | ```bash
 59 | cargo run --example videopub -- \
 60 |     --url https://localhost:4443 \
 61 |     --namespace example \
 62 |     --fragment-duration 2000 \
 63 |     --with-audio  # Optional: enable audio publishing
 64 | ```
 65 | 
 66 | ### Example Pipeline
 67 | 
 68 | ```bash
 69 | gst-launch-1.0 \
 70 |     videotestsrc ! x264enc ! h264parse ! \
 71 |     moqpublisher url="https://localhost:4443" namespace="example" \
 72 |         fragment-duration=2000
 73 | ```
 74 | 
 75 | ### Building a Custom Pipeline
 76 | 
 77 | The element supports multiple input pads for different media tracks. Each pad must be requested with `request_pad_simple("sink_%u")` and configured with appropriate track settings:
 78 | 
 79 | ```rust
 80 | let moqpub = gst::ElementFactory::make("moqpublisher")
 81 |     .property("url", "https://localhost:4443")
 82 |     .property("namespace", "example")
 83 |     .build()?;
 84 | 
 85 | // Request and configure video pad
 86 | let video_pad = moqpub.request_pad_simple("sink_%u").unwrap();
 87 | let video_settings = gst::Structure::builder("video1-rendition")
 88 |     .field("track-name", "video_1")
 89 |     .field("priority", 127u8)
 90 |     .build();
 91 | video_pad.set_property("track-settings", &video_settings);
 92 | ```
 93 | 
 94 | ## Debugging
 95 | 
 96 | The element supports GStreamer's debug system. Enable debug output with:
 97 | 
 98 | ```bash
 99 | export GST_DEBUG=moqpublisher:4
100 | ```
101 | 
102 | The example program also generates pipeline graphs in dot format when running. These can be converted to images with:
103 | 
104 | ```bash
105 | dot -Tpng moq-publisher.dot > pipeline.png
106 | ```
107 | 
108 | ## License
109 | 
110 | This project is licensed under the Mozilla Public License 2.0 - see the LICENSE file for details.
111 | 


--------------------------------------------------------------------------------
/build.rs:
--------------------------------------------------------------------------------
1 | fn main() {
2 |     gst_plugin_version_helper::info()
3 | }
4 | 


--------------------------------------------------------------------------------
/examples/filepub.rs:
--------------------------------------------------------------------------------
  1 | use clap::Parser;
  2 | use gst::glib;
  3 | use gst::prelude::*;
  4 | use std::sync::{Arc, Mutex};
  5 | 
  6 | /// MoQ video publisher example that publishes from a file source
  7 | #[derive(Parser, Debug)]
  8 | #[command(author, version, about, long_about = None)]
  9 | struct Args {
 10 |     /// Source file path
 11 |     #[arg(short, long)]
 12 |     source: String,
 13 | 
 14 |     /// MoQ relay URL
 15 |     #[arg(short, long, default_value = "https://localhost:4443")]
 16 |     url: String,
 17 | 
 18 |     /// MoQ namespace
 19 |     #[arg(short, long, default_value = "example")]
 20 |     namespace: String,
 21 | 
 22 |     /// Fragment duration in milliseconds
 23 |     #[arg(short, long, default_value_t = 2000)]
 24 |     fragment_duration: u64,
 25 | 
 26 |     /// Optional client certificate file
 27 |     #[arg(short, long)]
 28 |     certificate_file: Option<String>,
 29 | 
 30 |     /// Skip audio from source file
 31 |     #[arg(long)]
 32 |     no_audio: bool,
 33 | }
 34 | 
 35 | fn create_video_encoder() -> Result<(gst::Element, gst::Element), Box<dyn std::error::Error>> {
 36 |     let videoenc = gst::ElementFactory::make("x264enc")
 37 |         .property("bframes", 0u32)
 38 |         .property("key-int-max", 50u32)
 39 |         .property_from_str("tune", "zerolatency")
 40 |         .build()?;
 41 | 
 42 |     let h264_capsfilter = gst::ElementFactory::make("capsfilter")
 43 |         .property(
 44 |             "caps",
 45 |             gst::Caps::builder("video/x-h264")
 46 |                 .field("profile", "main")
 47 |                 .field("framerate", &gst::Fraction::new(25, 1))
 48 |                 .build(),
 49 |         )
 50 |         .build()?;
 51 | 
 52 |     Ok((videoenc, h264_capsfilter))
 53 | }
 54 | 
 55 | fn create_audio_encoder() -> Result<(gst::Element, gst::Element), Box<dyn std::error::Error>> {
 56 |     let audioenc = gst::ElementFactory::make("avenc_aac").build()?;
 57 |     let audio_capsfilter = gst::ElementFactory::make("capsfilter")
 58 |         .property(
 59 |             "caps",
 60 |             gst::Caps::builder("audio/mpeg")
 61 |                 .field("mpegversion", 4i32)
 62 |                 .build(),
 63 |         )
 64 |         .build()?;
 65 | 
 66 |     Ok((audioenc, audio_capsfilter))
 67 | }
 68 | 
 69 | fn setup_source_pipeline(
 70 |     pipeline: &gst::Pipeline,
 71 |     moqpub: &gst::Element,
 72 |     source_path: &str,
 73 |     no_audio: bool,
 74 | ) -> Result<(), Box<dyn std::error::Error>> {
 75 |     // Create source elements
 76 |     let filesrc = gst::ElementFactory::make("filesrc")
 77 |         .property("location", source_path)
 78 |         .build()?;
 79 |     let decodebin = gst::ElementFactory::make("decodebin").build()?;
 80 | 
 81 |     // Add elements to pipeline
 82 |     pipeline.add_many([&filesrc, &decodebin])?;
 83 |     gst::Element::link_many(&[&filesrc, &decodebin])?;
 84 | 
 85 |     // Create converters and encoders, but don't link them yet
 86 |     let videoconvert = gst::ElementFactory::make("videoconvert").build()?;
 87 |     let videorate = gst::ElementFactory::make("videorate").build()?;
 88 |     let (videoenc, h264_capsfilter) = create_video_encoder()?;
 89 |     pipeline.add_many([&videoconvert, &videorate, &videoenc, &h264_capsfilter])?;
 90 |     gst::Element::link_many(&[&videoconvert, &videorate, &videoenc, &h264_capsfilter])?;
 91 | 
 92 |     // Setup video pad on moqpub
 93 |     let video_pad = moqpub.request_pad_simple("sink_%u").unwrap();
 94 |     let video_settings = gst::Structure::builder("video1-rendition")
 95 |         .field("track-name", "video_1")
 96 |         .field("priority", 127u8)
 97 |         .build();
 98 |     video_pad.set_property("track-settings", &video_settings);
 99 | 
100 |     let video_src_pad = h264_capsfilter.static_pad("src").unwrap();
101 |     video_src_pad.link(&video_pad)?;
102 | 
103 |     // Create audio elements if audio is enabled
104 |     let audio_elements: Option<(gst::Element, gst::Element, gst::Element, gst::Element)> = if !no_audio {
105 |         let audioconvert = gst::ElementFactory::make("audioconvert").build()?;
106 |         let audioresample = gst::ElementFactory::make("audioresample").build()?;
107 |         let (audioenc, audio_capsfilter) = create_audio_encoder()?;
108 | 
109 |         pipeline.add_many([&audioconvert, &audioresample, &audioenc, &audio_capsfilter])?;
110 |         gst::Element::link_many(&[
111 |             &audioconvert,
112 |             &audioresample,
113 |             &audioenc,
114 |             &audio_capsfilter,
115 |         ])?;
116 | 
117 |         let audio_pad = moqpub.request_pad_simple("sink_%u").unwrap();
118 |         let audio_settings = gst::Structure::builder("audio1-rendition")
119 |             .field("track-name", "audio_1")
120 |             .field("priority", 100u8)
121 |             .build();
122 |         audio_pad.set_property("track-settings", &audio_settings);
123 | 
124 |         let audio_src_pad = audio_capsfilter.static_pad("src").unwrap();
125 |         audio_src_pad.link(&audio_pad)?;
126 | 
127 |         Some((audioconvert, audioresample, audioenc, audio_capsfilter))
128 |     } else {
129 |         None
130 |     };
131 | 
132 |     // Handle pad-added signal from decodebin
133 |     decodebin.connect_pad_added(move |dbin, src_pad| {
134 |         println!("Pad added on decodebin");
135 | 
136 |         let caps = src_pad.current_caps().unwrap();
137 |         let str_caps = caps.structure(0).unwrap();
138 |         let media_type = str_caps.name();
139 | 
140 |         match media_type.as_str() {
141 |             "video/x-raw" => {
142 |                 let sink_pad = videoconvert.static_pad("sink").unwrap();
143 |                 if src_pad.link(&sink_pad).is_err() {
144 |                     eprintln!("Failed to link video pad");
145 |                 }
146 |             }
147 |             "audio/x-raw" => {
148 |                 if !no_audio {
149 |                     if let Some((audioconvert, _, _, _)) = &audio_elements
150 |                     {
151 |                         let sink_pad = audioconvert.static_pad("sink").unwrap();
152 |                         if src_pad.link(&sink_pad).is_err() {
153 |                             eprintln!("Failed to link audio pad");
154 |                         }
155 |                     }
156 |                 }
157 |             }
158 |             _ => {
159 |                 println!("Unknown pad type: {}", media_type);
160 |             }
161 |         }
162 |     });
163 | 
164 |     Ok(())
165 | }
166 | 
167 | fn main() -> Result<(), Box<dyn std::error::Error>> {
168 |     env_logger::init();
169 |     
170 |     // Parse command line arguments
171 |     let args = Args::parse();
172 | 
173 |     // Initialize GStreamer
174 |     gst::init()?;
175 |     gstmoq::plugin_register_static().unwrap();
176 | 
177 |     // Create pipeline
178 |     let pipeline = gst::Pipeline::new();
179 | 
180 |     // Create moqpublisher
181 |     let moqpub = gst::ElementFactory::make("moqpublisher")
182 |         .property("url", args.url)
183 |         .property("namespace", args.namespace)
184 |         .property("fragment-duration", args.fragment_duration.mseconds())
185 |         .property("chunk-duration", 40.mseconds()) // 25fps thus 40ms per frame
186 |         .build()?;
187 | 
188 |     // Add certificate file if specified
189 |     if let Some(cert_file) = args.certificate_file {
190 |         moqpub.set_property("certificate-file", cert_file);
191 |     }
192 | 
193 |     pipeline.add(&moqpub)?;
194 | 
195 |     // Setup the source pipeline
196 |     setup_source_pipeline(&pipeline, &moqpub, &args.source, args.no_audio)?;
197 | 
198 |     // Create a main loop to run our GStreamer pipeline
199 |     let main_loop = glib::MainLoop::new(None, false);
200 |     let main_loop_clone = main_loop.clone();
201 | 
202 |     // Create an error flag that we can share between callbacks
203 |     let error_occurred = Arc::new(Mutex::new(false));
204 |     let error_occurred_clone = error_occurred.clone();
205 | 
206 |     // Add a bus watch to handle messages from the pipeline
207 |     let bus = pipeline.bus().unwrap();
208 |     let _watch = bus.add_watch({
209 |         let pipeline_weak = pipeline.downgrade();
210 |         move |_, msg| {
211 |             let pipeline = match pipeline_weak.upgrade() {
212 |                 Some(pipeline) => pipeline,
213 |                 None => return glib::ControlFlow::Break,
214 |             };
215 |             use gst::MessageView;
216 | 
217 |             match msg.view() {
218 |                 MessageView::Eos(..) => {
219 |                     println!("End of stream received");
220 |                     main_loop_clone.quit();
221 |                     return glib::ControlFlow::Break;
222 |                 }
223 |                 MessageView::Error(err) => {
224 |                     let mut error_flag = error_occurred_clone.lock().unwrap();
225 |                     *error_flag = true;
226 |                     eprintln!(
227 |                         "Error from {:?}: {} ({:?})",
228 |                         err.src().map(|s| s.path_string()),
229 |                         err.error(),
230 |                         err.debug()
231 |                     );
232 |                     main_loop_clone.quit();
233 |                     return glib::ControlFlow::Break;
234 |                 }
235 |                 MessageView::StateChanged(state) => {
236 |                     // Only print state changes from the pipeline
237 |                     if state
238 |                         .src()
239 |                         .map(|s| s == pipeline.upcast_ref::<gst::Object>())
240 |                         .unwrap_or(false)
241 |                     {
242 |                         println!(
243 |                             "Pipeline state changed from {:?} to {:?}",
244 |                             state.old(),
245 |                             state.current()
246 |                         );
247 |                     }
248 |                 }
249 |                 _ => (),
250 |             }
251 |             glib::ControlFlow::Continue
252 |         }
253 |     })?;
254 | 
255 |     // Setup signal handling for Ctrl+C
256 |     ctrlc::set_handler({
257 |         let main_loop = main_loop.clone();
258 |         let pipeline = pipeline.downgrade();
259 |         move || {
260 |             println!("\nReceived interrupt signal, stopping pipeline...");
261 |             let pipeline = match pipeline.upgrade() {
262 |                 Some(pipeline) => pipeline,
263 |                 None => {
264 |                     main_loop.quit();
265 |                     return;
266 |                 }
267 |             };
268 |             pipeline
269 |                 .debug_to_dot_file_with_ts(gst::DebugGraphDetails::all(), "moq-publisher-quitting");
270 |             pipeline.send_event(gst::event::Eos::new());
271 |             main_loop.quit();
272 |         }
273 |     })?;
274 | 
275 |     // Start playing
276 |     pipeline.set_state(gst::State::Playing)?;
277 |     println!("Pipeline is playing...");
278 | 
279 |     let weak_pipeline = pipeline.downgrade();
280 |     glib::timeout_add_seconds_once(5, move || {
281 |         let pipeline = match weak_pipeline.upgrade() {
282 |             Some(pipeline) => pipeline,
283 |             None => return,
284 |         };
285 | 
286 |         pipeline.debug_to_dot_file_with_ts(gst::DebugGraphDetails::all(), "moq-publisher");
287 |     });
288 | 
289 |     // Run the main loop
290 |     main_loop.run();
291 | 
292 |     // Cleanup
293 |     println!("Stopping pipeline...");
294 |     pipeline.set_state(gst::State::Null)?;
295 | 
296 |     // Check if we're exiting due to an error
297 |     if *error_occurred.lock().unwrap() {
298 |         std::process::exit(1);
299 |     }
300 | 
301 |     Ok(())
302 | }
303 | 


--------------------------------------------------------------------------------
/examples/videopub.rs:
--------------------------------------------------------------------------------
  1 | use clap::Parser;
  2 | use gst::glib;
  3 | use gst::prelude::*;
  4 | use std::sync::{Arc, Mutex};
  5 | 
  6 | /// Simple MoQ video publisher example
  7 | #[derive(Parser, Debug)]
  8 | #[command(author, version, about, long_about = None)]
  9 | struct Args {
 10 |     /// MoQ relay URL
 11 |     #[arg(short, long, default_value = "https://localhost:4443")]
 12 |     url: String,
 13 | 
 14 |     /// MoQ namespace
 15 |     #[arg(short, long, default_value = "example")]
 16 |     namespace: String,
 17 | 
 18 |     /// Fragment duration in milliseconds
 19 |     #[arg(short, long, default_value_t = 2000)]
 20 |     fragment_duration: u64,
 21 | 
 22 |     /// Optional client certificate file
 23 |     #[arg(short, long)]
 24 |     certificate_file: Option<String>,
 25 | 
 26 |     /// Enable audio publishing
 27 |     #[arg(long)]
 28 |     with_audio: bool,
 29 | }
 30 | 
 31 | fn setup_audio_elements(
 32 |     pipeline: &gst::Pipeline,
 33 |     moqpub: &gst::Element,
 34 | ) -> Result<(), Box<dyn std::error::Error>> {
 35 |     let audiotestsrc = gst::ElementFactory::make("audiotestsrc")
 36 |         .property_from_str("wave", "ticks")
 37 |         .build()?;
 38 | 
 39 |     let audioenc = gst::ElementFactory::make("avenc_aac").build()?;
 40 | 
 41 |     let audio_capsfilter = gst::ElementFactory::make("capsfilter")
 42 |         .property(
 43 |             "caps",
 44 |             gst::Caps::builder("audio/mpeg")
 45 |                 .field("mpegversion", 4i32)
 46 |                 .build(),
 47 |         )
 48 |         .build()?;
 49 | 
 50 |     pipeline.add_many([&audiotestsrc, &audioenc, &audio_capsfilter])?;
 51 |     gst::Element::link_many(&[&audiotestsrc, &audioenc, &audio_capsfilter])?;
 52 | 
 53 |     let audio_pad = moqpub.request_pad_simple("sink_%u").unwrap();
 54 |     let audio_settings = gst::Structure::builder("audio1-rendition")
 55 |         .field("track-name", "audio_1")
 56 |         .field("priority", 100u8)
 57 |         .build();
 58 |     audio_pad.set_property("track-settings", &audio_settings);
 59 | 
 60 |     let audio_src_pad = audio_capsfilter.static_pad("src").unwrap();
 61 |     audio_src_pad.link(&audio_pad)?;
 62 | 
 63 |     Ok(())
 64 | }
 65 | 
 66 | fn main() -> Result<(), Box<dyn std::error::Error>> {
 67 |     env_logger::init();
 68 |     // Parse command line arguments
 69 |     let args = Args::parse();
 70 | 
 71 |     // Initialize GStreamer
 72 |     gst::init()?;
 73 |     gstmoq::plugin_register_static().unwrap();
 74 | 
 75 |     // Create pipeline
 76 |     let pipeline = gst::Pipeline::new();
 77 | 
 78 |     // Create moqpublisher
 79 |     let moqpub = gst::ElementFactory::make("moqpublisher")
 80 |         .property("url", args.url)
 81 |         .property("namespace", args.namespace)
 82 |         .property("fragment-duration", args.fragment_duration.mseconds())
 83 |         .property("chunk-duration", 40.mseconds()) // 25fps thus 40ms per frame
 84 |         .build()?;
 85 | 
 86 |     // Add certificate file if specified
 87 |     if let Some(cert_file) = args.certificate_file {
 88 |         moqpub.set_property("certificate-file", cert_file);
 89 |     }
 90 | 
 91 |     // Create video source elements
 92 |     let videotestsrc = gst::ElementFactory::make("videotestsrc")
 93 |         .property_from_str("pattern", "ball")
 94 |         .build()?;
 95 | 
 96 |     let videoenc = gst::ElementFactory::make("x264enc")
 97 |         .property("bframes", 0u32)
 98 |         .property("key-int-max", 50u32) // We want keyframes every 2 seconds, as we use chunk-duration, the fragment-duration (request IDR frames) is not used
 99 |         .property_from_str("tune", "zerolatency")
100 |         .build()?;
101 | 
102 |     let h264_capsfilter = gst::ElementFactory::make("capsfilter")
103 |         .property(
104 |             "caps",
105 |             gst::Caps::builder("video/x-h264")
106 |                 .field("profile", "main")
107 |                 .field("framerate", &gst::Fraction::new(25, 1))
108 |                 .build(),
109 |         )
110 |         .build()?;
111 | 
112 |     // Add elements to pipeline
113 |     pipeline.add_many([&videotestsrc, &videoenc, &h264_capsfilter, &moqpub])?;
114 | 
115 |     // Link video elements
116 |     gst::Element::link_many(&[&videotestsrc, &videoenc, &h264_capsfilter])?;
117 | 
118 |     // Setup moqpublisher pad
119 |     let video_pad = moqpub.request_pad_simple("sink_%u").unwrap();
120 |     let s = gst::Structure::builder("video1-rendition")
121 |         .field("track-name", "video_1")
122 |         .field("priority", 127u8)
123 |         .build();
124 |     video_pad.set_property("track-settings", &s);
125 | 
126 |     let caps_src_pad = h264_capsfilter.static_pad("src").unwrap();
127 |     caps_src_pad.link(&video_pad)?;
128 | 
129 |     // After creating moqpublisher, add:
130 |     if args.with_audio {
131 |         setup_audio_elements(&pipeline, &moqpub)?;
132 |     }
133 | 
134 |     // Create a main loop to run our GStreamer pipeline
135 |     let main_loop = glib::MainLoop::new(None, false);
136 |     let main_loop_clone = main_loop.clone();
137 | 
138 |     // Create an error flag that we can share between callbacks
139 |     let error_occurred = Arc::new(Mutex::new(false));
140 |     let error_occurred_clone = error_occurred.clone();
141 | 
142 |     // Add a bus watch to handle messages from the pipeline
143 |     let bus = pipeline.bus().unwrap();
144 |     let _watch = bus.add_watch({
145 |         let pipeline_weak = pipeline.downgrade();
146 |         move |_, msg| {
147 |             let pipeline = match pipeline_weak.upgrade() {
148 |                 Some(pipeline) => pipeline,
149 |                 None => return glib::ControlFlow::Break,
150 |             };
151 |             use gst::MessageView;
152 | 
153 |             match msg.view() {
154 |                 MessageView::Eos(..) => {
155 |                     println!("End of stream received");
156 |                     main_loop_clone.quit();
157 |                     return glib::ControlFlow::Break;
158 |                 }
159 |                 MessageView::Error(err) => {
160 |                     let mut error_flag = error_occurred_clone.lock().unwrap();
161 |                     *error_flag = true;
162 |                     eprintln!(
163 |                         "Error from {:?}: {} ({:?})",
164 |                         err.src().map(|s| s.path_string()),
165 |                         err.error(),
166 |                         err.debug()
167 |                     );
168 |                     main_loop_clone.quit();
169 |                     return glib::ControlFlow::Break;
170 |                 }
171 |                 MessageView::StateChanged(state) => {
172 |                     // Only print state changes from the pipeline
173 |                     if state
174 |                         .src()
175 |                         .map(|s| s == pipeline.upcast_ref::<gst::Object>())
176 |                         .unwrap_or(false)
177 |                     {
178 |                         println!(
179 |                             "Pipeline state changed from {:?} to {:?}",
180 |                             state.old(),
181 |                             state.current()
182 |                         );
183 |                     }
184 |                 }
185 |                 _ => (),
186 |             }
187 |             glib::ControlFlow::Continue
188 |         }
189 |     })?;
190 | 
191 |     // Setup signal handling for Ctrl+C
192 |     ctrlc::set_handler({
193 |         let main_loop = main_loop.clone();
194 |         let pipeline = pipeline.downgrade();
195 |         move || {
196 |             println!("\nReceived interrupt signal, stopping pipeline...");
197 |             let pipeline = match pipeline.upgrade() {
198 |                 Some(pipeline) => pipeline,
199 |                 None => {
200 |                     main_loop.quit();
201 |                     return;
202 |                 }
203 |             };
204 |             pipeline
205 |                 .debug_to_dot_file_with_ts(gst::DebugGraphDetails::all(), "moq-publisher-quitting");
206 |             pipeline.send_event(gst::event::Eos::new());
207 |             main_loop.quit();
208 |         }
209 |     })?;
210 | 
211 |     // Start playing
212 |     pipeline.set_state(gst::State::Playing)?;
213 |     println!("Pipeline is playing...");
214 | 
215 |     let weak_pipeline = pipeline.downgrade();
216 |     glib::timeout_add_seconds_once(5, move || {
217 |         let pipeline = match weak_pipeline.upgrade() {
218 |             Some(pipeline) => pipeline,
219 |             None => return,
220 |         };
221 | 
222 |         pipeline.debug_to_dot_file_with_ts(gst::DebugGraphDetails::all(), "moq-publisher");
223 |     });
224 | 
225 |     // Run the main loop
226 |     main_loop.run();
227 | 
228 |     // Cleanup
229 |     println!("Stopping pipeline...");
230 |     pipeline.set_state(gst::State::Null)?;
231 | 
232 |     // Check if we're exiting due to an error
233 |     if *error_occurred.lock().unwrap() {
234 |         std::process::exit(1);
235 |     }
236 | 
237 |     Ok(())
238 | }
239 | 


--------------------------------------------------------------------------------
/src/lib.rs:
--------------------------------------------------------------------------------
 1 | mod moqpublisher;
 2 | 
 3 | use gst::glib;
 4 | 
 5 | fn plugin_init(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
 6 |     moqpublisher::register(plugin)?;
 7 | 
 8 |     Ok(())
 9 | }
10 | 
11 | gst::plugin_define!(
12 |     gstmoq,
13 |     env!("CARGO_PKG_DESCRIPTION"),
14 |     plugin_init,
15 |     concat!(env!("CARGO_PKG_VERSION"), "-", env!("COMMIT_ID")),
16 |     "MPL",
17 |     env!("CARGO_PKG_NAME"),
18 |     env!("CARGO_PKG_NAME"),
19 |     env!("CARGO_PKG_REPOSITORY"),
20 |     env!("BUILD_REL_DATE")
21 | );
22 | 


--------------------------------------------------------------------------------
/src/moqpublisher/imp.rs:
--------------------------------------------------------------------------------
  1 | // Copyright (C) 2025, Rafael Caricio <rafael@caricio.com>
  2 | //
  3 | // This Source Code Form is subject to the terms of the Mozilla Public License, v2.0.
  4 | // If a copy of the MPL was not distributed with this file, You can obtain one at
  5 | // <https://mozilla.org/MPL/2.0/>.
  6 | //
  7 | // SPDX-License-Identifier: MPL-2.0
  8 | 
  9 | use anyhow::Error;
 10 | use bytes::Bytes;
 11 | use gst::glib;
 12 | use gst::prelude::*;
 13 | use gst::subclass::prelude::*;
 14 | use moq_transport::coding::Tuple;
 15 | use moq_transport::serve;
 16 | use moq_transport::session::Publisher;
 17 | use once_cell::sync::Lazy;
 18 | use std::collections::HashMap;
 19 | use std::path::PathBuf;
 20 | use std::sync::atomic::{AtomicU32, AtomicU64, Ordering};
 21 | use std::sync::LazyLock;
 22 | use std::sync::{Arc, Mutex};
 23 | use tokio::runtime;
 24 | use tokio::task::JoinHandle;
 25 | use url;
 26 | 
 27 | static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
 28 |     gst::DebugCategory::new(
 29 |         "moqpublisher",
 30 |         gst::DebugColorFlags::empty(),
 31 |         Some("MoQ Publisher Element"),
 32 |     )
 33 | });
 34 | 
 35 | static RUNTIME: LazyLock<runtime::Runtime> = LazyLock::new(|| {
 36 |     runtime::Builder::new_multi_thread()
 37 |         .enable_all()
 38 |         .worker_threads(1)
 39 |         .build()
 40 |         .unwrap()
 41 | });
 42 | 
 43 | #[derive(Default, Clone)]
 44 | struct MoqPublisherSinkPadSettings {
 45 |     // MoQ track name for this pad
 46 |     track_name: Option<String>,
 47 | 
 48 |     // Track priority (0-255)
 49 |     priority: Option<u8>,
 50 | }
 51 | 
 52 | impl From<gst::Structure> for MoqPublisherSinkPadSettings {
 53 |     fn from(s: gst::Structure) -> Self {
 54 |         MoqPublisherSinkPadSettings {
 55 |             track_name: s.get_optional::<String>("track-name").unwrap(),
 56 |             priority: s.get_optional::<u8>("priority").unwrap(),
 57 |         }
 58 |     }
 59 | }
 60 | 
 61 | impl From<MoqPublisherSinkPadSettings> for gst::Structure {
 62 |     fn from(obj: MoqPublisherSinkPadSettings) -> Self {
 63 |         gst::Structure::builder("track-settings")
 64 |             .field_if_some("track-name", obj.track_name)
 65 |             .field_if_some("priority", obj.priority)
 66 |             .build()
 67 |     }
 68 | }
 69 | 
 70 | #[derive(Default)]
 71 | pub(crate) struct MoqPublisherSinkPad {
 72 |     settings: Mutex<MoqPublisherSinkPadSettings>,
 73 | }
 74 | 
 75 | #[glib::object_subclass]
 76 | impl ObjectSubclass for MoqPublisherSinkPad {
 77 |     const NAME: &'static str = "MoqPublisherSinkPad";
 78 |     type Type = super::MoqPublisherSinkPad;
 79 |     type ParentType = gst::GhostPad;
 80 | }
 81 | 
 82 | impl ObjectImpl for MoqPublisherSinkPad {
 83 |     fn properties() -> &'static [glib::ParamSpec] {
 84 |         static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
 85 |             vec![
 86 |                 glib::ParamSpecBoxed::builder::<gst::Structure>("track-settings")
 87 |                     .nick("Track Settings")
 88 |                     .blurb("MoQ track settings")
 89 |                     .mutable_ready()
 90 |                     .build(),
 91 |             ]
 92 |         });
 93 | 
 94 |         PROPERTIES.as_ref()
 95 |     }
 96 | 
 97 |     fn set_property(&self, _id: usize, value: &glib::Value, pspec: &glib::ParamSpec) {
 98 |         match pspec.name() {
 99 |             "track-settings" => {
100 |                 let s = value
101 |                     .get::<gst::Structure>()
102 |                     .expect("Must be a valid structure");
103 |                 let mut settings = self.settings.lock().unwrap();
104 |                 *settings = s.into();
105 |             }
106 |             _ => unimplemented!(),
107 |         }
108 |     }
109 | 
110 |     fn property(&self, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
111 |         let settings = self.settings.lock().unwrap();
112 | 
113 |         match pspec.name() {
114 |             "track-settings" => Into::<gst::Structure>::into(settings.clone()).to_value(),
115 |             _ => unimplemented!(),
116 |         }
117 |     }
118 | }
119 | 
120 | impl GstObjectImpl for MoqPublisherSinkPad {}
121 | 
122 | impl PadImpl for MoqPublisherSinkPad {}
123 | 
124 | impl ProxyPadImpl for MoqPublisherSinkPad {}
125 | 
126 | impl GhostPadImpl for MoqPublisherSinkPad {}
127 | 
128 | struct State {
129 |     broadcast: serve::TracksWriter,
130 |     catalog: serve::SubgroupsWriter,
131 |     connection_task: JoinHandle<()>,
132 |     announce_task: JoinHandle<()>,
133 | }
134 | 
135 | static DEFAULT_URL: &str = "";
136 | static DEFAULT_CERTIFICATE_FILE: Option<PathBuf> = None;
137 | static DEFAULT_FRAGMENT_DURATION: u64 = 2000;
138 | static DEFAULT_CHUNK_DURATION: u64 = i64::MAX as u64;
139 | static DEFAULT_NAMESPACE: &str = "default";
140 | 
141 | #[derive(Debug, Clone)]
142 | struct Settings {
143 |     // MoQ relay URL to connect to using WebTransport
144 |     url: String,
145 | 
146 |     // Path to client certificate file for WebTransport
147 |     certificate_file: Option<PathBuf>,
148 | 
149 |     // Makes sure all cmafmux GoP's duration are the same
150 |     fragment_duration: u64,
151 | 
152 |     // Duration of each chunk
153 |     chunk_duration: u64,
154 | 
155 |     // MoQ namespace for tracks
156 |     namespace: String,
157 | }
158 | 
159 | impl Default for Settings {
160 |     fn default() -> Self {
161 |         Self {
162 |             url: DEFAULT_URL.to_string(),
163 |             certificate_file: DEFAULT_CERTIFICATE_FILE.clone(),
164 |             fragment_duration: DEFAULT_FRAGMENT_DURATION,
165 |             chunk_duration: DEFAULT_CHUNK_DURATION,
166 |             namespace: DEFAULT_NAMESPACE.to_string(),
167 |         }
168 |     }
169 | }
170 | 
171 | struct TrackData {
172 |     segment_track_name: Option<String>,
173 |     segment_track: Option<serve::SubgroupsWriter>,
174 |     init_track: Option<serve::SubgroupsWriter>,
175 |     init_track_name: Option<String>,
176 |     pad: String,
177 |     sequence: AtomicU64,
178 | 
179 |     // Media info for track, set after the caps are fixed
180 |     media_info: Option<MediaInfo>,
181 | }
182 | 
183 | #[derive(Clone)]
184 | struct MediaInfo {
185 |     codec_mime: String,
186 |     width: Option<i32>,
187 |     height: Option<i32>,
188 |     channels: Option<i32>,
189 |     sample_rate: Option<i32>,
190 | }
191 | 
192 | fn get_codec_mime_from_caps(caps: &gst::CapsRef) -> String {
193 |     let mime = gst_pbutils::codec_utils_caps_get_mime_codec(caps);
194 |     mime.map(|s| s.to_string())
195 |         .unwrap_or_else(|_| "application/octet-stream".to_string())
196 | }
197 | 
198 | impl MediaInfo {
199 |     fn new(caps: &gst::CapsRef) -> Self {
200 |         let codec_mime = get_codec_mime_from_caps(caps);
201 |         let s = caps.structure(0).unwrap();
202 |         let width = s.get::<i32>("width").ok();
203 |         let height = s.get::<i32>("height").ok();
204 |         let channels = s.get::<i32>("channels").ok();
205 |         let sample_rate = s.get::<i32>("rate").ok();
206 | 
207 |         Self {
208 |             codec_mime,
209 |             width,
210 |             height,
211 |             channels,
212 |             sample_rate,
213 |         }
214 |     }
215 | }
216 | 
217 | pub struct MoqPublisher {
218 |     settings: Arc<Mutex<Settings>>,
219 |     state: Arc<Mutex<Option<State>>>,
220 | 
221 |     // Pad name -> TrackData
222 |     track_data: Mutex<HashMap<String, TrackData>>,
223 | 
224 |     // Counter for generating unique sink pad names
225 |     sink_pad_counter: AtomicU32,
226 | }
227 | 
228 | #[glib::object_subclass]
229 | impl ObjectSubclass for MoqPublisher {
230 |     const NAME: &'static str = "GstMoqPublisher";
231 |     type Type = super::MoqPublisher;
232 |     type ParentType = gst::Bin;
233 |     type Interfaces = (gst::ChildProxy,);
234 | 
235 |     fn new() -> Self {
236 |         Self {
237 |             settings: Arc::new(Mutex::new(Settings::default())),
238 |             state: Arc::new(Mutex::new(None)),
239 |             track_data: Mutex::new(HashMap::new()),
240 |             sink_pad_counter: AtomicU32::new(0),
241 |         }
242 |     }
243 | }
244 | 
245 | impl GstObjectImpl for MoqPublisher {}
246 | 
247 | impl BinImpl for MoqPublisher {}
248 | 
249 | impl ObjectImpl for MoqPublisher {
250 |     fn properties() -> &'static [glib::ParamSpec] {
251 |         static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
252 |             vec![
253 |                 glib::ParamSpecString::builder("url")
254 |                     .nick("URL")
255 |                     .blurb("MoQ relay URL")
256 |                     .build(),
257 |                 glib::ParamSpecString::builder("certificate-file")
258 |                     .nick("Certificate File")
259 |                     .blurb("Path to client certificate file")
260 |                     .build(),
261 |                 glib::ParamSpecUInt64::builder("fragment-duration")
262 |                     .nick("Fragment Duration")
263 |                     .blurb("CMAF fragment duration in milliseconds")
264 |                     .default_value(DEFAULT_FRAGMENT_DURATION)
265 |                     .build(),
266 |                 glib::ParamSpecUInt64::builder("chunk-duration")
267 |                     .nick("Chunk Duration")
268 |                     .blurb("Duration of each chunk in milliseconds")
269 |                     .default_value(DEFAULT_CHUNK_DURATION)
270 |                     .build(),
271 |                 glib::ParamSpecString::builder("namespace")
272 |                     .nick("Namespace")
273 |                     .blurb("MoQ namespace for tracks")
274 |                     .default_value("default")
275 |                     .build(),
276 |             ]
277 |         });
278 |         PROPERTIES.as_ref()
279 |     }
280 | 
281 |     fn set_property(&self, _id: usize, value: &glib::Value, pspec: &glib::ParamSpec) {
282 |         let mut settings = self.settings.lock().unwrap();
283 |         match pspec.name() {
284 |             "url" => {
285 |                 settings.url = value.get::<String>().unwrap();
286 |             }
287 |             "certificate-file" => {
288 |                 if let Ok(path) = value.get::<String>() {
289 |                     settings.certificate_file = Some(PathBuf::from(path));
290 |                 } else {
291 |                     settings.certificate_file = None;
292 |                 }
293 |             }
294 |             "fragment-duration" => {
295 |                 settings.fragment_duration = value.get::<u64>().unwrap();
296 |             }
297 |             "chunk-duration" => {
298 |                 settings.chunk_duration = value.get::<u64>().unwrap();
299 |             }
300 |             "namespace" => {
301 |                 settings.namespace = value.get::<String>().unwrap();
302 |             }
303 |             _ => unimplemented!(),
304 |         }
305 |     }
306 | 
307 |     fn property(&self, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
308 |         let settings = self.settings.lock().unwrap();
309 |         match pspec.name() {
310 |             "url" => settings.url.to_value(),
311 |             "certificate-file" => settings
312 |                 .certificate_file
313 |                 .as_ref()
314 |                 .map(|p| p.to_str().unwrap().to_string())
315 |                 .to_value(),
316 |             "fragment-duration" => settings.fragment_duration.to_value(),
317 |             "chunk-duration" => settings.chunk_duration.to_value(),
318 |             "namespace" => settings.namespace.to_value(),
319 |             _ => unimplemented!(),
320 |         }
321 |     }
322 | }
323 | 
324 | impl ChildProxyImpl for MoqPublisher {
325 |     fn children_count(&self) -> u32 {
326 |         let object = self.obj();
327 |         object.num_pads() as u32
328 |     }
329 | 
330 |     fn child_by_name(&self, name: &str) -> Option<glib::Object> {
331 |         let object = self.obj();
332 |         object
333 |             .pads()
334 |             .into_iter()
335 |             .find(|p| p.name() == name)
336 |             .map(|p| p.upcast())
337 |     }
338 | 
339 |     fn child_by_index(&self, index: u32) -> Option<glib::Object> {
340 |         let object = self.obj();
341 |         object
342 |             .pads()
343 |             .into_iter()
344 |             .nth(index as usize)
345 |             .map(|p| p.upcast())
346 |     }
347 | }
348 | 
349 | impl ElementImpl for MoqPublisher {
350 |     fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
351 |         static ELEMENT_METADATA: LazyLock<gst::subclass::ElementMetadata> = LazyLock::new(|| {
352 |             gst::subclass::ElementMetadata::new(
353 |                 "MoQ Publisher Sink",
354 |                 "Source/Network/QUIC/MoQ",
355 |                 "Send media data to a MoQ relay server",
356 |                 "Rafael Caricio <rafael@caricio.com>",
357 |             )
358 |         });
359 |         Some(&*ELEMENT_METADATA)
360 |     }
361 | 
362 |     fn pad_templates() -> &'static [gst::PadTemplate] {
363 |         static PAD_TEMPLATES: LazyLock<Vec<gst::PadTemplate>> = LazyLock::new(|| {
364 |             // Caps are restricted by the cmafmux element negotiation inside our bin element
365 |             let sink_pad_template = gst::PadTemplate::with_gtype(
366 |                 "sink_%u",
367 |                 gst::PadDirection::Sink,
368 |                 gst::PadPresence::Request,
369 |                 &gst::Caps::new_any(),
370 |                 super::MoqPublisherSinkPad::static_type(),
371 |             )
372 |             .unwrap();
373 | 
374 |             vec![sink_pad_template]
375 |         });
376 | 
377 |         PAD_TEMPLATES.as_ref()
378 |     }
379 | 
380 |     fn request_new_pad(
381 |         &self,
382 |         templ: &gst::PadTemplate,
383 |         _name: Option<&str>,
384 |         _caps: Option<&gst::Caps>,
385 |     ) -> Option<gst::Pad> {
386 |         let element = self.obj();
387 | 
388 |         // Only allow pad requests in NULL/READY state
389 |         if element.current_state() > gst::State::Ready {
390 |             gst::error!(
391 |                 CAT,
392 |                 obj = element,
393 |                 "Cannot request pad in non-NULL/READY state"
394 |             );
395 |             return None;
396 |         }
397 | 
398 |         gst::info!(CAT, obj = element, "Requesting new sink pad");
399 | 
400 |         let settings = self.settings.lock().unwrap();
401 | 
402 |         // Generate unique pad name
403 |         let pad_num = self.sink_pad_counter.fetch_add(1, Ordering::SeqCst);
404 |         let pad_name = format!("sink_{}", pad_num);
405 | 
406 |         // Create the sink pad
407 |         let sink_pad = gst::PadBuilder::<super::MoqPublisherSinkPad>::from_template(templ)
408 |             .name(&pad_name)
409 |             .build();
410 | 
411 |         // Create internal elements
412 |         let cmafmux = gst::ElementFactory::make("cmafmux")
413 |             .property("fragment-duration", settings.fragment_duration)
414 |             .property("chunk-duration", settings.chunk_duration)
415 |             .property_from_str("header-update-mode", "update")
416 |             .property("write-mehd", true)
417 |             .build()
418 |             .unwrap();
419 | 
420 |         let appsink = gst_app::AppSink::builder()
421 |             .name(pad_name.clone())
422 |             .buffer_list(true)
423 |             .sync(true)
424 |             .callbacks({
425 |                 let this = self.downgrade();
426 | 
427 |                 gst_app::AppSinkCallbacks::builder()
428 |                     .new_sample(move |appsink| {
429 |                         let this = match this.upgrade() {
430 |                             Some(this) => this,
431 |                             None => return Ok(gst::FlowSuccess::Ok),
432 |                         };
433 | 
434 |                         let sample = appsink.pull_sample().map_err(|_| gst::FlowError::Eos)?;
435 |                         let buffer_list = sample.buffer_list_owned().expect("no buffer list");
436 | 
437 |                         let mut track_data = this.track_data.lock().unwrap();
438 |                         let track = track_data.get_mut(&pad_name).unwrap();
439 | 
440 |                         gst::debug!(
441 |                             CAT,
442 |                             obj = this.obj(),
443 |                             "Received buffer list with {} buffers",
444 |                             buffer_list.len()
445 |                         );
446 | 
447 |                         if let Err(err) = this.handle_cmaf_data(track, buffer_list) {
448 |                             gst::error!(CAT, "Failed to handle CMAF data: {}", err);
449 |                             return Err(gst::FlowError::Error);
450 |                         }
451 | 
452 |                         Ok(gst::FlowSuccess::Ok)
453 |                     })
454 |                     .build()
455 |             })
456 |             .build();
457 | 
458 |         // Add elements to bin
459 |         element.add_many([&cmafmux, appsink.upcast_ref()]).unwrap();
460 |         gst::Element::link_many([&cmafmux, appsink.upcast_ref()]).unwrap();
461 | 
462 |         // Create ghost pad
463 |         let muxer_sink = cmafmux.static_pad("sink").unwrap();
464 |         sink_pad.set_target(Some(&muxer_sink)).unwrap();
465 | 
466 |         // Add probe for caps events
467 |         sink_pad.add_probe(gst::PadProbeType::EVENT_BOTH, {
468 |             let this = self.downgrade();
469 |             move |pad, info| {
470 |                 let this = match this.upgrade() {
471 |                     Some(this) => this,
472 |                     None => return gst::PadProbeReturn::Remove,
473 |                 };
474 | 
475 |                 if let Some(gst::PadProbeData::Event(ref event)) = info.data {
476 |                     if let gst::EventView::Caps(caps_evt) = event.view() {
477 |                         let caps = caps_evt.caps();
478 |                         gst::debug!(
479 |                             CAT,
480 |                             obj = this.obj(),
481 |                             "Received caps event on pad {}: {:?}",
482 |                             pad.name(),
483 |                             caps
484 |                         );
485 | 
486 |                         // Create MediaInfo from the caps
487 |                         let media_info = MediaInfo::new(caps);
488 | 
489 |                         // Store the media info in track data
490 |                         let mut track_data = this.track_data.lock().unwrap();
491 |                         gst::debug!(
492 |                             CAT,
493 |                             obj = this.obj(),
494 |                             "Updating media info for track {}",
495 |                             pad.name()
496 |                         );
497 |                         if let Some(track) = track_data.get_mut(&pad.name().to_string()) {
498 |                             track.media_info = Some(media_info);
499 |                             gst::debug!(
500 |                                 CAT,
501 |                                 obj = this.obj(),
502 |                                 "Updated media info for track {}",
503 |                                 pad.name()
504 |                             );
505 | 
506 |                             // Check if all tracks have media info and create catalog if ready
507 |                             if track_data.values().all(|t| t.media_info.is_some()) {
508 |                                 gst::debug!(
509 |                                     CAT,
510 |                                     obj = this.obj(),
511 |                                     "All tracks have media info, creating catalog"
512 |                                 );
513 |                                 drop(track_data);
514 |                                 if let Err(e) = this.create_catalog() {
515 |                                     gst::error!(CAT, obj = pad, "Failed to create catalog: {}", e);
516 |                                 }
517 |                             } else {
518 |                                 gst::debug!(
519 |                                     CAT,
520 |                                     obj = this.obj(),
521 |                                     "Not all tracks have media info yet"
522 |                                 );
523 |                             }
524 |                         }
525 |                     }
526 |                 }
527 | 
528 |                 gst::PadProbeReturn::Ok
529 |             }
530 |         });
531 | 
532 |         // Add pad to element
533 |         element.add_pad(&sink_pad).unwrap();
534 |         element.child_added(sink_pad.upcast_ref::<gst::Object>(), &sink_pad.name());
535 | 
536 |         // Store track data
537 |         let track_data = TrackData {
538 |             segment_track: None, // Will be set up in READY->PAUSED
539 |             segment_track_name: None,
540 |             init_track: None, // Will be set up in READY->PAUSED
541 |             init_track_name: None,
542 |             pad: sink_pad.name().to_string(),
543 |             sequence: AtomicU64::new(1), // Start at 1 since 0 is reserved for init segment
544 |             media_info: None,
545 |         };
546 | 
547 |         self.track_data
548 |             .lock()
549 |             .unwrap()
550 |             .insert(sink_pad.name().to_string(), track_data);
551 | 
552 |         Some(sink_pad.upcast())
553 |     }
554 | 
555 |     fn change_state(
556 |         &self,
557 |         transition: gst::StateChange,
558 |     ) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
559 |         match transition {
560 |             gst::StateChange::ReadyToPaused => {
561 |                 // Setup connection and publisher in one go
562 |                 if let Err(e) = self.setup_connection() {
563 |                     gst::error!(CAT, obj = self.obj(), "Failed to setup connection: {:?}", e);
564 |                     return Err(e);
565 |                 }
566 | 
567 |                 // Announce tracks after connection setup
568 |                 if let Err(e) = self.announce_tracks() {
569 |                     gst::error!(CAT, obj = self.obj(), "Failed to announce tracks: {:?}", e);
570 |                     return Err(e);
571 |                 }
572 |             }
573 | 
574 |             gst::StateChange::PausedToReady => {
575 |                 // Cleanup publisher
576 |                 self.cleanup_publisher();
577 |             }
578 | 
579 |             _ => (),
580 |         }
581 | 
582 |         // Chain up
583 |         self.parent_change_state(transition)
584 |     }
585 | }
586 | 
587 | impl MoqPublisher {
588 |     fn setup_connection(&self) -> Result<(), gst::StateChangeError> {
589 |         let settings = self.settings.lock().unwrap();
590 |         let url = url::Url::parse(&settings.url).map_err(|e| {
591 |             gst::error!(CAT, obj = self.obj(), "Invalid URL {}: {}", settings.url, e);
592 |             gst::StateChangeError
593 |         })?;
594 |         let namespace = Tuple::from_utf8_path(&settings.namespace.clone());
595 |         let cert_path = settings.certificate_file.clone();
596 |         drop(settings);
597 | 
598 |         // Setup connection synchronously in the runtime
599 |         let (broadcast, catalog, connection_task, announce_task) = RUNTIME.block_on(async {
600 |             let mut tls = moq_native_ietf::tls::Args::default();
601 |             if let Some(path) = cert_path {
602 |                 tls.root = vec![path];
603 |             }
604 |             tls.disable_verify = true;
605 | 
606 |             let quic = moq_native_ietf::quic::Endpoint::new(moq_native_ietf::quic::Config {
607 |                 bind: "[::]:0".parse().unwrap(),
608 |                 tls: tls.load().map_err(|e| {
609 |                     gst::error!(CAT, obj = self.obj(), "Failed to load TLS config: {}", e);
610 |                     gst::StateChangeError
611 |                 })?,
612 |             })
613 |             .map_err(|e| {
614 |                 gst::error!(
615 |                     CAT,
616 |                     obj = self.obj(),
617 |                     "Failed to create QUIC endpoint: {}",
618 |                     e
619 |                 );
620 |                 gst::StateChangeError
621 |             })?;
622 | 
623 |             let session = quic.client.connect(&url).await.map_err(|e| {
624 |                 gst::error!(CAT, obj = self.obj(), "Failed to connect: {}", e);
625 |                 gst::StateChangeError
626 |             })?;
627 | 
628 |             let (session, mut publisher) = Publisher::connect(session).await.map_err(|e| {
629 |                 gst::error!(CAT, obj = self.obj(), "Failed to create publisher: {}", e);
630 |                 gst::StateChangeError
631 |             })?;
632 | 
633 |             // Create tracks container
634 |             let (mut broadcast, _, reader) = serve::Tracks::new(namespace).produce();
635 | 
636 |             // Create catalog track
637 |             let catalog = broadcast
638 |                 .create(".catalog")
639 |                 .ok_or_else(|| gst::StateChangeError)?
640 |                 .groups()
641 |                 .map_err(|_| gst::StateChangeError)?;
642 | 
643 |             // Create connection task
644 |             let connection_task = tokio::spawn({
645 |                 let el_weak = self.obj().downgrade();
646 |                 async move {
647 |                     let element = el_weak.upgrade().unwrap();
648 |                     gst::debug!(CAT, obj = element, "Starting session");
649 |                     if let Err(e) = session.run().await {
650 |                         gst::error!(CAT, obj = element, "Session error: {}", e);
651 |                         element.send_event(gst::event::Eos::new());
652 |                     }
653 |                     gst::debug!(CAT, obj = element, "Session done!");
654 |                 }
655 |             });
656 | 
657 |             // Create announce task
658 |             let announce_task = tokio::spawn({
659 |                 let el_weak = self.obj().downgrade();
660 |                 async move {
661 |                     let element = el_weak.upgrade().unwrap();
662 |                     gst::debug!(CAT, obj = element, "Announcing tracks");
663 |                     if let Err(e) = publisher.announce(reader).await {
664 |                         gst::error!(CAT, obj = element, "Publisher announce error: {}", e);
665 |                         element.send_event(gst::event::Eos::new());
666 |                     }
667 |                     gst::debug!(CAT, obj = element, "Announce done!");
668 |                 }
669 |             });
670 | 
671 |             Ok::<_, gst::StateChangeError>((broadcast, catalog, connection_task, announce_task))
672 |         })?;
673 | 
674 |         gst::info!(CAT, obj = self.obj(), "Connected to MoQ relay at {}", url);
675 | 
676 |         // Store new state
677 |         *self.state.lock().unwrap() = Some(State {
678 |             broadcast,
679 |             catalog,
680 |             connection_task,
681 |             announce_task,
682 |         });
683 | 
684 |         Ok(())
685 |     }
686 | 
687 |     fn announce_tracks(&self) -> Result<(), gst::StateChangeError> {
688 |         let mut state_guard = self.state.lock().unwrap();
689 |         let state = state_guard.as_mut().ok_or_else(|| {
690 |             gst::error!(CAT, obj = self.obj(), "Not in ready state");
691 |             gst::StateChangeError
692 |         })?;
693 | 
694 |         let mut track_data = self.track_data.lock().unwrap();
695 | 
696 |         for (pad_name, track) in track_data.iter_mut() {
697 |             let pad = self
698 |                 .obj()
699 |                 .static_pad(pad_name)
700 |                 .unwrap()
701 |                 .downcast::<super::MoqPublisherSinkPad>()
702 |                 .unwrap();
703 | 
704 |             let track_name = pad
705 |                 .imp()
706 |                 .settings
707 |                 .lock()
708 |                 .unwrap()
709 |                 .track_name
710 |                 .clone()
711 |                 .unwrap_or_else(|| pad_name.clone());
712 |             let init_track_name = format!("{}_init.mp4", track_name);
713 |             let segment_track_name = format!("{}.m4s", track_name);
714 | 
715 |             // Create per-track init segment track
716 |             let init_track = state
717 |                 .broadcast
718 |                 .create(&init_track_name)
719 |                 .ok_or_else(|| {
720 |                     gst::error!(CAT, obj = self.obj(), "Failed to create init track");
721 |                     gst::StateChangeError
722 |                 })?
723 |                 .groups()
724 |                 .map_err(|_| gst::StateChangeError)?;
725 | 
726 |             track.init_track = Some(init_track);
727 | 
728 |             // Create media track
729 |             let track_writer = state.broadcast.create(&segment_track_name).ok_or_else(|| {
730 |                 gst::error!(CAT, obj = self.obj(), "Failed to create track writer");
731 |                 gst::StateChangeError
732 |             })?;
733 | 
734 |             track.init_track_name = Some(init_track_name);
735 |             track.segment_track_name = Some(segment_track_name);
736 | 
737 |             track.segment_track = Some(track_writer.groups().map_err(|_| {
738 |                 gst::error!(CAT, obj = self.obj(), "Failed to create segment track");
739 |                 gst::StateChangeError
740 |             })?);
741 |         }
742 | 
743 |         Ok(())
744 |     }
745 | 
746 |     fn create_catalog(&self) -> Result<(), Error> {
747 |         let mut state_guard = self.state.lock().unwrap();
748 |         let state = state_guard
749 |             .as_mut()
750 |             .ok_or_else(|| anyhow::anyhow!("Not in ready state"))?;
751 | 
752 |         let mut tracks = Vec::new();
753 |         let mut track_data = self.track_data.lock().unwrap();
754 | 
755 |         for (pad_name, track) in track_data.iter_mut() {
756 |             let media_info = track.media_info.as_ref().ok_or_else(|| {
757 |                 anyhow::anyhow!("Missing media info for track on pad {}", pad_name)
758 |             })?;
759 | 
760 |             let mut selection_params = moq_catalog::SelectionParam::default();
761 | 
762 |             // Use get_mime_type for codec string
763 |             selection_params.codec = Some(media_info.codec_mime.clone());
764 | 
765 |             // Set video-specific parameters
766 |             if let (Some(width), Some(height)) = (media_info.width, media_info.height) {
767 |                 selection_params.width = Some(width as u32);
768 |                 selection_params.height = Some(height as u32);
769 |             }
770 | 
771 |             // Set audio-specific parameters
772 |             if let Some(channels) = media_info.channels {
773 |                 selection_params.channel_config = Some(channels.to_string());
774 |             }
775 |             if let Some(sample_rate) = media_info.sample_rate {
776 |                 selection_params.samplerate = Some(sample_rate as u32);
777 |             }
778 | 
779 |             let catalog_track = moq_catalog::Track {
780 |                 init_track: track.init_track_name.clone(),
781 |                 name: track.segment_track_name.clone().unwrap(),
782 |                 namespace: Some(state.broadcast.namespace.to_utf8_path()),
783 |                 packaging: Some(moq_catalog::TrackPackaging::Cmaf),
784 |                 render_group: Some(1),
785 |                 selection_params,
786 |                 ..Default::default()
787 |             };
788 | 
789 |             tracks.push(catalog_track);
790 |         }
791 | 
792 |         let catalog = moq_catalog::Root {
793 |             version: 1,
794 |             streaming_format: 1,
795 |             streaming_format_version: "0.2".to_string(),
796 |             streaming_delta_updates: true,
797 |             common_track_fields: moq_catalog::CommonTrackFields::from_tracks(&mut tracks),
798 |             tracks,
799 |         };
800 | 
801 |         let catalog_str = serde_json::to_string_pretty(&catalog)?;
802 |         gst::info!(CAT, obj = self.obj(), "MoQ catalog: {}", catalog_str);
803 | 
804 |         // Write catalog to track
805 |         state
806 |             .catalog
807 |             .append(0)
808 |             .map_err(|e| {
809 |                 gst::error!(CAT, obj = self.obj(), "Failed to append catalog: {}", e);
810 |                 gst::StateChangeError
811 |             })?
812 |             .write(catalog_str.into())
813 |             .map_err(|e| {
814 |                 gst::error!(CAT, obj = self.obj(), "Failed to write catalog: {}", e);
815 |                 gst::StateChangeError
816 |             })?;
817 | 
818 |         gst::debug!(CAT, obj = self.obj(), "Published catalog");
819 | 
820 |         Ok(())
821 |     }
822 | 
823 |     fn cleanup_publisher(&self) {
824 |         let mut state = self.state.lock().unwrap();
825 | 
826 |         // Clear track writers
827 |         let mut track_data = self.track_data.lock().unwrap();
828 |         for (_, track) in track_data.iter_mut() {
829 |             track.segment_track = None;
830 |         }
831 | 
832 |         // Take and clean up state if it exists
833 |         if let Some(state) = state.take() {
834 |             // Abort both tasks
835 |             state.connection_task.abort();
836 |             state.announce_task.abort();
837 | 
838 |             // Wait for both tasks
839 |             let _ = RUNTIME.block_on(async {
840 |                 let _ = state.connection_task.await;
841 |                 let _ = state.announce_task.await;
842 |             });
843 |         }
844 |     }
845 | 
846 |     fn handle_cmaf_data(
847 |         &self,
848 |         track: &mut TrackData,
849 |         mut buffer_list: gst::BufferList,
850 |     ) -> Result<(), Error> {
851 |         assert!(!buffer_list.is_empty());
852 | 
853 |         let mut first = buffer_list.get(0).unwrap();
854 | 
855 |         // Handle initialization segment
856 |         if first
857 |             .flags()
858 |             .contains(gst::BufferFlags::DISCONT | gst::BufferFlags::HEADER)
859 |         {
860 |             // Write to track's init track
861 |             let init_track = track.init_track.as_mut().ok_or_else(|| {
862 |                 anyhow::anyhow!("Init track not initialized for pad {}", track.pad)
863 |             })?;
864 | 
865 |             let mut group = init_track.append(0)?;
866 |             let map = first.map_readable().unwrap();
867 |             group.write(Bytes::copy_from_slice(&map))?;
868 |             drop(map);
869 | 
870 |             gst::debug!(
871 |                 CAT,
872 |                 obj = self.obj(),
873 |                 "Wrote init segment for track {}",
874 |                 track.pad
875 |             );
876 | 
877 |             // Remove init segment from buffer list and continue with media data
878 |             buffer_list.make_mut().remove(0..1);
879 | 
880 |             if buffer_list.is_empty() {
881 |                 return Ok(());
882 |             }
883 |             first = buffer_list.get(0).unwrap();
884 |         }
885 | 
886 |         // Process the rest of the media segment
887 |         if !first.flags().contains(gst::BufferFlags::HEADER) {
888 |             return Err(anyhow::anyhow!("Missing segment header"));
889 |         }
890 | 
891 |         let pad = self
892 |             .obj()
893 |             .static_pad(&track.pad)
894 |             .unwrap()
895 |             .downcast::<super::MoqPublisherSinkPad>()
896 |             .unwrap();
897 | 
898 |         let segment_sequence = track.sequence.fetch_add(1, Ordering::SeqCst);
899 |         let priority = pad.imp().settings.lock().unwrap().priority;
900 | 
901 |         // Create MoQ group for segment
902 |         let mut group = track
903 |             .segment_track
904 |             .as_mut()
905 |             .expect("track writer not initialized")
906 |             .create(serve::Subgroup {
907 |                 group_id: segment_sequence,
908 |                 priority: priority.unwrap_or(127),
909 |                 subgroup_id: 0,
910 |             })?;
911 | 
912 |         // Write all buffers
913 |         for buffer in buffer_list.iter() {
914 |             let map = buffer.map_readable().unwrap();
915 |             group.write(Bytes::copy_from_slice(&map))?;
916 |         }
917 | 
918 |         gst::debug!(
919 |             CAT,
920 |             obj = self.obj(),
921 |             "Published group {} for pad {}",
922 |             segment_sequence,
923 |             track.pad
924 |         );
925 | 
926 |         Ok(())
927 |     }
928 | }
929 | 


--------------------------------------------------------------------------------
/src/moqpublisher/mod.rs:
--------------------------------------------------------------------------------
 1 | // Copyright (C) 2025, Rafael Caricio <rafael@caricio.com>
 2 | //
 3 | // This Source Code Form is subject to the terms of the Mozilla Public License, v2.0.
 4 | // If a copy of the MPL was not distributed with this file, You can obtain one at
 5 | // <https://mozilla.org/MPL/2.0/>.
 6 | //
 7 | // SPDX-License-Identifier: MPL-2.0
 8 | 
 9 | use gst::glib;
10 | use gst::prelude::*;
11 | 
12 | mod imp;
13 | 
14 | glib::wrapper! {
15 |     pub struct MoqPublisher(ObjectSubclass<imp::MoqPublisher>) @extends gst::Bin, gst::Element, gst::Object, @implements gst::ChildProxy;
16 | }
17 | 
18 | glib::wrapper! {
19 |     pub(crate) struct MoqPublisherSinkPad(ObjectSubclass<imp::MoqPublisherSinkPad>) @extends gst::GhostPad, gst::ProxyPad, gst::Pad, gst::Object;
20 | }
21 | 
22 | pub fn register(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
23 |     gst::Element::register(
24 |         Some(plugin),
25 |         "moqpublisher",
26 |         gst::Rank::NONE,
27 |         MoqPublisher::static_type(),
28 |     )
29 | }
30 | 


--------------------------------------------------------------------------------
/tests/moqpublisher.rs:
--------------------------------------------------------------------------------
 1 | use gst::prelude::*;
 2 | 
 3 | fn init() {
 4 |     use std::sync::Once;
 5 |     static INIT: Once = Once::new();
 6 | 
 7 |     INIT.call_once(|| {
 8 |         gst::init().unwrap();
 9 |         gstmoq::plugin_register_static().unwrap();
10 |     });
11 | }
12 | 
13 | #[test]
14 | fn test_element_basic_usage() {
15 |     init();
16 | 
17 |     // Create test pipeline
18 |     let pipeline = gst::Pipeline::new();
19 | 
20 |     // Create moqpublisher
21 |     let moqpub = gst::ElementFactory::make("moqpublisher")
22 |         .property("url", "https://localhost:4443")
23 |         .property("namespace", "testmovie")
24 |         .property("fragment-duration", 2000.mseconds())
25 |         .build()
26 |         .unwrap();
27 | 
28 |     // Create video source elements
29 |     let videotestsrc = gst::ElementFactory::make("videotestsrc")
30 |         .property("pattern", "ball")
31 |         .build()
32 |         .unwrap();
33 |     let videoenc = gst::ElementFactory::make("x264enc")
34 |         .property("bframes", 0u32)
35 |         .property("key-int-max", i32::MAX as u32) // Let the muxer drive keyframe generation
36 |         .property("tune", "zerolatency")
37 |         .build()
38 |         .unwrap();
39 |     let h264_capsfilter = gst::ElementFactory::make("capsfilter")
40 |         .property(
41 |             "caps",
42 |             gst::Caps::builder("video/x-h264")
43 |                 .field("profile", "main")
44 |                 .build(),
45 |         )
46 |         .build()
47 |         .unwrap();
48 | 
49 |     // Add elements to pipeline
50 |     pipeline
51 |         .add_many([&videotestsrc, &videoenc, &h264_capsfilter, &moqpub])
52 |         .unwrap();
53 | 
54 |     // Link video elements
55 |     gst::Element::link_many(&[&videotestsrc, &videoenc, &h264_capsfilter]).unwrap();
56 | 
57 |     // setup moqpublisher pad
58 |     let video_pad = moqpub.request_pad_simple("sink_0").unwrap();
59 |     let s = gst::Structure::builder("video1-rendition")
60 |         .field("track-name", "VIDEO")
61 |         .field("priority", 127u8)
62 |         .build();
63 |     video_pad.set_property("track-settings", &s);
64 | 
65 |     let caps_src_pad = h264_capsfilter.static_pad("src").unwrap();
66 |     caps_src_pad.link(&video_pad).unwrap();
67 | 
68 |     // Test state changes
69 |     pipeline.set_state(gst::State::Paused).unwrap();
70 | 
71 |     // Wait for preroll
72 |     let _ = pipeline.state(gst::ClockTime::from_seconds(5));
73 | 
74 |     // Cleanup
75 |     pipeline.set_state(gst::State::Null).unwrap();
76 | }
77 | 


--------------------------------------------------------------------------------
/work_plan.md:
--------------------------------------------------------------------------------
 1 | 
 2 | Issues to be fixed in the `moqpublisher` element code:
 3 | - Missing to keep the "broadcast" (with name broadcast to avoid confusion) in the element state
 4 | - Missing to create the init for every track with name "0.mp4" eg. `let init = broadcast.create("0.mp4")`
 5 | - Missing creating the ".catalog" track
 6 | - Missing to populate the catalog track with the tracks information as `moq_catalog::Root` object. Eg.:
 7 |     ```rust
 8 |     let catalog = moq_catalog::Root {
 9 | 			version: 1,
10 | 			streaming_format: 1,
11 | 			streaming_format_version: "0.2".to_string(),
12 | 			streaming_delta_updates: true,
13 | 			common_track_fields: moq_catalog::CommonTrackFields::from_tracks(&mut tracks),
14 | 			tracks,
15 | 		};
16 | 
17 | 		let catalog_str = serde_json::to_string_pretty(&catalog)?;
18 | 		log::info!("catalog: {}", catalog_str);
19 | 
20 | 		// Create a single fragment for the segment.
21 | 		self.catalog.append(0)?.write(catalog_str.into())?;
22 |     ```
23 | - Missing to create a `moq_catalog::Track` for each track
24 | - Missing to populate `let mut selection_params = moq_catalog::SelectionParam::default();` for each track
25 | 
26 | 
27 | We have example code for all the above in the moq-pub project. We can use to learn how to apply that to our GStreamer element.


--------------------------------------------------------------------------------