mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-12-03 16:56:37 +00:00
Implement support for FEC / retransmission
This commit is contained in:
Mathieu Duponchelle
parent
7bd7c4e960
commit
1826111278
7 changed files with 274 additions and 31 deletions
97
Cargo.lock
generated
97
Cargo.lock
generated
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@ -179,6 +179,17 @@ version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "065374052e7df7ee4047b1160cca5e1467a12351a40b3da123c870ba0b8eda2a"
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[[package]]
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name = "atty"
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version = "0.2.14"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
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dependencies = [
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"hermit-abi",
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"libc",
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"winapi",
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]
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[[package]]
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name = "autocfg"
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version = "1.0.1"
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@ -277,6 +288,36 @@ dependencies = [
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"winapi",
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]
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[[package]]
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name = "clap"
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version = "3.0.0-rc.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c068998524e6d40ea78c8d2a4b00398f0a8b818c2d484bcb3cbeb2cff2c105ae"
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dependencies = [
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"atty",
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"bitflags",
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"clap_derive",
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"indexmap",
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"lazy_static",
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"os_str_bytes",
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"strsim",
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"termcolor",
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"textwrap",
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]
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[[package]]
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name = "clap_derive"
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version = "3.0.0-rc.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0152ba3ee01fa5a9133d4e15a1d9659c75d2270365768dd5a880cc7e68871874"
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dependencies = [
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"heck",
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"proc-macro-error",
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"proc-macro2",
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"quote",
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"syn",
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]
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[[package]]
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name = "concurrent-queue"
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version = "1.2.2"
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@ -783,6 +824,12 @@ dependencies = [
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"system-deps",
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]
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[[package]]
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name = "hashbrown"
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version = "0.11.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
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[[package]]
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name = "heck"
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version = "0.3.3"
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@ -829,6 +876,16 @@ dependencies = [
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"unicode-normalization",
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]
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[[package]]
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name = "indexmap"
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version = "1.7.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "bc633605454125dec4b66843673f01c7df2b89479b32e0ed634e43a91cff62a5"
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dependencies = [
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"autocfg",
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"hashbrown",
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]
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[[package]]
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name = "instant"
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version = "0.1.12"
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@ -1024,6 +1081,15 @@ dependencies = [
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"paste",
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]
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[[package]]
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name = "os_str_bytes"
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version = "6.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8e22443d1643a904602595ba1cd8f7d896afe56d26712531c5ff73a15b2fbf64"
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dependencies = [
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"memchr",
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]
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[[package]]
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name = "parking"
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version = "2.0.0"
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@ -1373,6 +1439,12 @@ dependencies = [
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"winapi",
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]
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[[package]]
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name = "strsim"
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version = "0.10.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
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[[package]]
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name = "syn"
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version = "1.0.81"
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@ -1411,6 +1483,21 @@ dependencies = [
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"winapi",
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]
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[[package]]
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name = "termcolor"
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version = "1.1.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "2dfed899f0eb03f32ee8c6a0aabdb8a7949659e3466561fc0adf54e26d88c5f4"
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dependencies = [
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"winapi-util",
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]
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[[package]]
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name = "textwrap"
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version = "0.14.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0066c8d12af8b5acd21e00547c3797fde4e8677254a7ee429176ccebbe93dd80"
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[[package]]
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name = "thiserror"
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version = "1.0.30"
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@ -1743,6 +1830,7 @@ dependencies = [
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"anyhow",
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"async-std",
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"async-tungstenite",
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"clap",
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"fastrand",
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"futures",
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"gst-plugin-version-helper",
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@ -1788,6 +1876,15 @@ version = "0.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
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[[package]]
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name = "winapi-util"
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version = "0.1.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
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dependencies = [
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"winapi",
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]
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[[package]]
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name = "winapi-x86_64-pc-windows-gnu"
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version = "0.4.0"
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@ -176,6 +176,13 @@ gst-launch-1.0 webrtcsink congestion-control=disabled
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[simple tool]: https://github.com/tylertreat/comcast
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## Monitoring tool
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An example server / client application for monitoring per-consumer stats
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can be found [here].
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[here]: plugins/examples/README.md
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## License
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All code in this repository is licensed under the [MIT license].
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@ -31,6 +31,7 @@ tracing = { version = "0.1", features = ["log"] }
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tracing-subscriber = { version = "0.2", features = ["registry", "env-filter"] }
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tracing-log = "0.1"
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uuid = { version = "0.8", features = ["v4"] }
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clap = { version = "3.0.0-rc.1", features = ["derive"] }
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[lib]
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name = "webrtcsink"
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@ -6,13 +6,31 @@ use anyhow::Error;
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use async_std::net::{TcpListener, TcpStream};
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use async_std::task;
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use async_tungstenite::tungstenite::Message as WsMessage;
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use clap::Parser;
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use futures::channel::mpsc;
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use futures::prelude::*;
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use gst::glib::Type;
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use gst::prelude::*;
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use tracing::info;
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use tracing::{debug, info, trace};
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use tracing_subscriber::prelude::*;
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#[derive(Parser, Debug)]
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#[clap(about, version, author)]
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/// Program arguments
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struct Args {
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/// URI of file to serve. Must hold at least one audio and video stream
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uri: String,
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/// Disable Forward Error Correction
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#[clap(long)]
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disable_fec: bool,
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/// Disable retransmission
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#[clap(long)]
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disable_retransmission: bool,
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/// Disable congestion control
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#[clap(long)]
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disable_congestion_control: bool,
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}
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fn serialize_value(val: &gst::glib::Value) -> Option<serde_json::Value> {
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match val.type_() {
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Type::STRING => Some(val.get::<String>().unwrap().into()),
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@ -68,7 +86,7 @@ struct State {
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listeners: Vec<Listener>,
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}
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async fn run() -> Result<(), Error> {
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async fn run(args: Args) -> Result<(), Error> {
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tracing_log::LogTracer::init().expect("Failed to set logger");
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let env_filter = tracing_subscriber::EnvFilter::try_from_env("WEBRTCSINK_STATS_LOG")
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.unwrap_or_else(|_| tracing_subscriber::EnvFilter::new("info"));
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@ -93,8 +111,24 @@ async fn run() -> Result<(), Error> {
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let listener = try_socket.expect("Failed to bind");
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info!("Listening on: {}", addr);
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let pipeline =
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gst::parse_launch("webrtcsink name=ws videotestsrc ! queue ! ws. audiotestsrc ! ws.")?;
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info!("Disable FEC: {}", args.disable_fec);
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let pipeline_str = format!(
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"webrtcsink name=ws do-retransmission={} do-fec={} congestion-control={} \
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uridecodebin name=d uri={} \
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d. ! video/x-raw ! queue ! ws.video_0 \
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d. ! audio/x-raw ! queue ! ws.audio_0",
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!args.disable_retransmission,
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!args.disable_fec,
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if args.disable_congestion_control {
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"disabled"
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} else {
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"homegrown"
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},
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args.uri
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);
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let pipeline = gst::parse_launch(&pipeline_str)?;
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let ws = pipeline
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.downcast_ref::<gst::Bin>()
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.unwrap()
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@ -110,7 +144,7 @@ async fn run() -> Result<(), Error> {
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if let Some(ws) = ws_clone.upgrade() {
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let stats = ws.property::<gst::Structure>("stats");
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let stats = serialize_value(&stats.to_value()).unwrap();
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info!("Stats: {}", serde_json::to_string_pretty(&stats).unwrap());
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debug!("Stats: {}", serde_json::to_string_pretty(&stats).unwrap());
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let msg = WsMessage::Text(serde_json::to_string(&stats).unwrap());
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let listeners = state_clone.lock().unwrap().listeners.clone();
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@ -163,7 +197,7 @@ async fn accept_connection(state: Arc<Mutex<State>>, stream: TcpStream) {
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task::spawn(async move {
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while let Some(msg) = receiver.next().await {
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info!("Sending to one listener!");
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trace!("Sending to one listener!");
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if ws_stream.send(msg).await.is_err() {
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info!("Listener errored out");
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receiver.close();
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@ -175,5 +209,7 @@ async fn accept_connection(state: Arc<Mutex<State>>, stream: TcpStream) {
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fn main() -> Result<(), Error> {
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gst::init()?;
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task::block_on(run())
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let args = Args::parse();
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task::block_on(run(args))
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}
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@ -16,9 +16,19 @@
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let timeout: ReturnType<typeof setTimeout> | undefined = undefined
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const updateConsumerStats = (consumer: ConsumerType, stats: Object) => {
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let target_bitrate = 0
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let fec_percentage = 0
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let keyframe_requests = 0
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let retransmission_requests = 0
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let bitrate_sent = 0
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let bitrate_recv = 0
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let packet_loss = 0
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let delta_of_delta = 0
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if (stats["consumer-stats"]["video-encoders"].length > 0) {
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let venc = stats["consumer-stats"]["video-encoders"][0]
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consumer.stats["target_bitrate"] = venc["bitrate"]
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target_bitrate = venc["bitrate"]
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fec_percentage = venc["fec-percentage"]
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consumer.video_codec = venc["codec-name"]
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let mitigation_mode = MitigationMode.None
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@ -41,22 +51,32 @@
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}
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consumer.mitigation_mode = mitigation_mode
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} else {
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consumer.stats["target_bitrate"] = 0
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}
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for (let svalue of Object.values(stats)) {
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if (svalue["type"] == "transport") {
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let twcc_stats = svalue["gst-twcc-stats"]
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if (twcc_stats !== undefined) {
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consumer.stats["bitrate_sent"] = twcc_stats["bitrate-sent"]
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consumer.stats["bitrate_recv"] = twcc_stats["bitrate-recv"]
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consumer.stats["packet_loss"] = twcc_stats["packet-loss-pct"]
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consumer.stats["delta_of_delta"] = twcc_stats["avg-delta-of-delta"]
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bitrate_sent = twcc_stats["bitrate-sent"]
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bitrate_recv = twcc_stats["bitrate-recv"]
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packet_loss = twcc_stats["packet-loss-pct"]
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delta_of_delta = twcc_stats["avg-delta-of-delta"]
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}
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} else if (svalue["type"] == "outbound-rtp") {
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keyframe_requests += svalue["pli-count"]
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retransmission_requests += svalue["nack-count"]
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}
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}
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consumer.stats["target_bitrate"] = target_bitrate
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consumer.stats["fec_percentage"] = fec_percentage
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consumer.stats["bitrate_sent"] = bitrate_sent
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consumer.stats["bitrate_recv"] = bitrate_recv
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consumer.stats["packet_loss"] = packet_loss
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consumer.stats["delta_of_delta"] = delta_of_delta
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consumer.stats["keyframe_requests"] = keyframe_requests
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consumer.stats["retransmission_requests"] = retransmission_requests
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}
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const fetchStats = () => {
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@ -93,10 +113,13 @@
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mitigation_mode: MitigationMode.None,
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stats: new Map([
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["target_bitrate", 0],
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["fec_percentage", 0],
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["bitrate_sent", 0],
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["bitrate_recv", 0],
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["packet_loss", 0],
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["delta_of_delta", 0]
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["delta_of_delta", 0],
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["keyframe_requests", 0],
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["retransmission_requests", 0],
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]),
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}
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consumers.set(key, consumer)
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|
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@ -25,10 +25,11 @@
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let traces = []
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let layout = {
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legend: {traceorder: 'reversed'},
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height: 800,
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}
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let ctr = 1;
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let domain_step = 1.0 / consumer.stats.size
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let domain_margin = domain_step / consumer.stats.size
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let domain_margin = 0.05
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for (let key of consumer.stats.keys()) {
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let trace = {
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@ -112,7 +113,7 @@
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<style lang="scss">
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.modal {
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&-body {
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width: 700px;
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width: 1000px;
|
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padding: 20px 15px 10px;
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gap: 15px 0;
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.id {
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|
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@ -39,6 +39,8 @@ const DEFAULT_MIN_BITRATE: u32 = 1000;
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const DEFAULT_MAX_BITRATE: u32 = 8192000;
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const DEFAULT_CONGESTION_CONTROL: WebRTCSinkCongestionControl =
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WebRTCSinkCongestionControl::Homegrown;
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const DEFAULT_DO_FEC: bool = true;
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const DEFAULT_DO_RETRANSMISSION: bool = true;
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/// User configuration
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struct Settings {
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@ -49,6 +51,8 @@ struct Settings {
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cc_heuristic: WebRTCSinkCongestionControl,
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min_bitrate: u32,
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max_bitrate: u32,
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do_fec: bool,
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do_retransmission: bool,
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}
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/// Represents a codec we can offer
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@ -104,6 +108,7 @@ struct VideoEncoder {
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full_width: i32,
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peer_id: String,
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mitigation_mode: WebRTCSinkMitigationMode,
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transceiver: gst_webrtc::WebRTCRTPTransceiver,
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}
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struct CongestionController {
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@ -212,6 +217,8 @@ impl Default for Settings {
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turn_server: None,
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min_bitrate: DEFAULT_MIN_BITRATE,
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max_bitrate: DEFAULT_MAX_BITRATE,
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do_fec: DEFAULT_DO_FEC,
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do_retransmission: DEFAULT_DO_RETRANSMISSION,
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}
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}
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}
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@ -320,13 +327,14 @@ fn setup_encoding(
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enc.set_property("target-bitrate", 2560000i32);
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enc.set_property("cpu-used", -16i32);
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enc.set_property("keyframe-max-dist", 2000i32);
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enc.set_property_from_str("keyframe-mode", "disabled");
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enc.set_property_from_str("end-usage", "cbr");
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enc.set_property("buffer-initial-size", 100i32);
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enc.set_property("buffer-optimal-size", 120i32);
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enc.set_property("buffer-size", 300i32);
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enc.set_property("buffer-size", 150i32);
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enc.set_property("resize-allowed", true);
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enc.set_property("max-intra-bitrate", 250i32);
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enc.set_property_from_str("error-resilient", "default");
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pay.set_property_from_str("picture-id-mode", "15-bit");
|
||||
}
|
||||
"x264enc" => {
|
||||
|
|
@ -418,6 +426,7 @@ impl VideoEncoder {
|
|||
in_caps: &gst::Caps,
|
||||
peer_id: &str,
|
||||
codec_name: &str,
|
||||
transceiver: gst_webrtc::WebRTCRTPTransceiver,
|
||||
) -> Self {
|
||||
let s = in_caps.structure(0).unwrap();
|
||||
|
||||
|
|
@ -436,6 +445,7 @@ impl VideoEncoder {
|
|||
full_width,
|
||||
peer_id: peer_id.to_string(),
|
||||
mitigation_mode: WebRTCSinkMitigationMode::NONE,
|
||||
transceiver,
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -504,6 +514,10 @@ impl VideoEncoder {
|
|||
.field("bitrate", self.bitrate())
|
||||
.field("mitigation-mode", self.mitigation_mode)
|
||||
.field("codec-name", self.codec_name.as_str())
|
||||
.field(
|
||||
"fec-percentage",
|
||||
self.transceiver.property::<u32>("fec-percentage"),
|
||||
)
|
||||
.build()
|
||||
}
|
||||
}
|
||||
|
|
@ -741,8 +755,23 @@ impl CongestionController {
|
|||
}
|
||||
}
|
||||
|
||||
let target_bitrate = self.target_bitrate / n_encoders;
|
||||
|
||||
let fec_ratio = {
|
||||
if target_bitrate <= 2000000 || self.max_bitrate <= 2000000 {
|
||||
0f64
|
||||
} else {
|
||||
(target_bitrate as f64 - 2000000f64) / (self.max_bitrate as f64 - 2000000f64)
|
||||
}
|
||||
};
|
||||
|
||||
let fec_percentage = (fec_ratio * 50f64) as u32;
|
||||
|
||||
for encoder in encoders.iter_mut() {
|
||||
encoder.set_bitrate(element, self.target_bitrate / n_encoders);
|
||||
encoder.set_bitrate(element, target_bitrate);
|
||||
encoder
|
||||
.transceiver
|
||||
.set_property("fec-percentage", fec_percentage);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -752,10 +781,7 @@ impl State {
|
|||
fn finalize_consumer(&mut self, element: &super::WebRTCSink, consumer: Consumer, signal: bool) {
|
||||
consumer.pipeline.debug_to_dot_file_with_ts(
|
||||
gst::DebugGraphDetails::all(),
|
||||
format!(
|
||||
"removing-peer-{}-",
|
||||
consumer.peer_id,
|
||||
),
|
||||
format!("removing-peer-{}-", consumer.peer_id,),
|
||||
);
|
||||
|
||||
for webrtc_pad in consumer.webrtc_pads.values() {
|
||||
|
|
@ -842,7 +868,12 @@ impl Consumer {
|
|||
}
|
||||
|
||||
/// Request a sink pad on our webrtcbin, and set its transceiver's codec_preferences
|
||||
fn request_webrtcbin_pad(&mut self, element: &super::WebRTCSink, stream: &InputStream) {
|
||||
fn request_webrtcbin_pad(
|
||||
&mut self,
|
||||
element: &super::WebRTCSink,
|
||||
settings: &Settings,
|
||||
stream: &InputStream,
|
||||
) {
|
||||
let ssrc = self.generate_ssrc();
|
||||
let media_idx = self.webrtc_pads.len() as i32;
|
||||
|
||||
|
|
@ -875,6 +906,14 @@ impl Consumer {
|
|||
|
||||
transceiver.set_property("codec-preferences", &payloader_caps);
|
||||
|
||||
if stream.sink_pad.name().starts_with("video_") {
|
||||
if settings.do_fec {
|
||||
transceiver.set_property("fec-type", gst_webrtc::WebRTCFECType::UlpRed);
|
||||
}
|
||||
|
||||
transceiver.set_property("do-nack", settings.do_retransmission);
|
||||
}
|
||||
|
||||
self.webrtc_pads.insert(
|
||||
ssrc,
|
||||
WebRTCPad {
|
||||
|
|
@ -971,16 +1010,17 @@ impl Consumer {
|
|||
&webrtc_pad.in_caps,
|
||||
&self.peer_id,
|
||||
codec.caps.structure(0).unwrap().name(),
|
||||
transceiver,
|
||||
);
|
||||
|
||||
if let Some(congestion_controller) = self.congestion_controller.as_mut() {
|
||||
congestion_controller.target_bitrate += enc.bitrate();
|
||||
enc.transceiver.set_property("fec-percentage", 0u32);
|
||||
} else {
|
||||
/* If congestion control is disabled, we simply use the highest
|
||||
* known "safe" value for the bitrate.
|
||||
*
|
||||
*/
|
||||
* known "safe" value for the bitrate. */
|
||||
enc.set_bitrate(element, self.max_bitrate as i32);
|
||||
enc.transceiver.set_property("fec-percentage", 50u32);
|
||||
}
|
||||
|
||||
self.encoders.push(enc);
|
||||
|
|
@ -1492,7 +1532,7 @@ impl WebRTCSink {
|
|||
state
|
||||
.streams
|
||||
.iter()
|
||||
.for_each(|(_, stream)| consumer.request_webrtcbin_pad(element, &stream));
|
||||
.for_each(|(_, stream)| consumer.request_webrtcbin_pad(element, &settings, &stream));
|
||||
|
||||
let clock = element.clock();
|
||||
|
||||
|
|
@ -1625,6 +1665,11 @@ impl WebRTCSink {
|
|||
}
|
||||
}
|
||||
|
||||
consumer.pipeline.debug_to_dot_file_with_ts(
|
||||
gst::DebugGraphDetails::all(),
|
||||
format!("webrtcsink-peer-{}-remote-description-set", peer_id,),
|
||||
);
|
||||
|
||||
let element_clone = element.downgrade();
|
||||
let webrtcbin = consumer.webrtcbin.downgrade();
|
||||
let peer_id_clone = peer_id.clone();
|
||||
|
|
@ -2073,6 +2118,20 @@ impl ObjectImpl for WebRTCSink {
|
|||
gst::Structure::static_type(),
|
||||
glib::ParamFlags::READABLE,
|
||||
),
|
||||
glib::ParamSpecBoolean::new(
|
||||
"do-fec",
|
||||
"Do Forward Error Correction",
|
||||
"Whether the element should negotiate and send FEC data",
|
||||
DEFAULT_DO_FEC,
|
||||
glib::ParamFlags::READWRITE | gst::PARAM_FLAG_MUTABLE_READY
|
||||
),
|
||||
glib::ParamSpecBoolean::new(
|
||||
"do-retransmission",
|
||||
"Do retransmission",
|
||||
"Whether the element should offer to honor retransmission requests",
|
||||
DEFAULT_DO_RETRANSMISSION,
|
||||
glib::ParamFlags::READWRITE | gst::PARAM_FLAG_MUTABLE_READY
|
||||
),
|
||||
]
|
||||
});
|
||||
|
||||
|
|
@ -2126,14 +2185,15 @@ impl ObjectImpl for WebRTCSink {
|
|||
match new_heuristic {
|
||||
WebRTCSinkCongestionControl::Disabled => {
|
||||
consumer.congestion_controller.take();
|
||||
},
|
||||
}
|
||||
WebRTCSinkCongestionControl::Homegrown => {
|
||||
let _ = consumer.congestion_controller.insert(
|
||||
CongestionController::new(
|
||||
peer_id,
|
||||
settings.min_bitrate,
|
||||
settings.max_bitrate,
|
||||
));
|
||||
),
|
||||
);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -2147,6 +2207,14 @@ impl ObjectImpl for WebRTCSink {
|
|||
let mut settings = self.settings.lock().unwrap();
|
||||
settings.max_bitrate = value.get::<u32>().expect("type checked upstream");
|
||||
}
|
||||
"do-fec" => {
|
||||
let mut settings = self.settings.lock().unwrap();
|
||||
settings.do_fec = value.get::<bool>().expect("type checked upstream");
|
||||
}
|
||||
"do-retransmission" => {
|
||||
let mut settings = self.settings.lock().unwrap();
|
||||
settings.do_retransmission = value.get::<bool>().expect("type checked upstream");
|
||||
}
|
||||
_ => unimplemented!(),
|
||||
}
|
||||
}
|
||||
|
|
@ -2181,6 +2249,14 @@ impl ObjectImpl for WebRTCSink {
|
|||
let settings = self.settings.lock().unwrap();
|
||||
settings.max_bitrate.to_value()
|
||||
}
|
||||
"do-fec" => {
|
||||
let settings = self.settings.lock().unwrap();
|
||||
settings.do_fec.to_value()
|
||||
}
|
||||
"do-retransmission" => {
|
||||
let settings = self.settings.lock().unwrap();
|
||||
settings.do_retransmission.to_value()
|
||||
}
|
||||
"stats" => self.gather_stats().to_value(),
|
||||
_ => unimplemented!(),
|
||||
}
|
||||
|
|
@ -2269,6 +2345,8 @@ impl ElementImpl for WebRTCSink {
|
|||
_name: Option<String>,
|
||||
_caps: Option<&gst::Caps>,
|
||||
) -> Option<gst::Pad> {
|
||||
gst_error!(CAT, "pad being requested");
|
||||
|
||||
if element.current_state() > gst::State::Ready {
|
||||
gst_error!(CAT, "element pads can only be requested before starting");
|
||||
return None;
|
||||
|
|
|
|||
Loading…
Reference in a new issue