475 lines
16 KiB
Rust
475 lines
16 KiB
Rust
use crate::connection::{Connection, ConnectionError, ReadResult};
|
|
use crate::data::{MediaType, RtmpInput};
|
|
use crate::server::{Server, ServerResult};
|
|
use glib::subclass;
|
|
use glib::subclass::prelude::*;
|
|
use gst::prelude::*;
|
|
use gst::subclass::prelude::*;
|
|
use gst::{gst_debug, gst_trace, gst_info};
|
|
use gst_base::prelude::*;
|
|
use gst_base::subclass::prelude::*;
|
|
use once_cell::sync::Lazy;
|
|
use slab::Slab;
|
|
use std::collections::HashSet;
|
|
use std::net::{TcpListener, TcpStream};
|
|
use std::sync::mpsc::{channel, Receiver, Sender, TryRecvError};
|
|
use std::sync::Mutex;
|
|
use std::{thread, u32};
|
|
|
|
static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
|
|
gst::DebugCategory::new(
|
|
"rtmpsrvsrc",
|
|
gst::DebugColorFlags::empty(),
|
|
Some("RTMP Server Source"),
|
|
)
|
|
});
|
|
|
|
const DEFAULT_ADDRESS: &str = "0.0.0.0";
|
|
const DEFAULT_PORT: u32 = 5000;
|
|
|
|
#[derive(Debug, Clone)]
|
|
struct Settings {
|
|
address: String,
|
|
port: u32,
|
|
stream_key: Option<String>,
|
|
}
|
|
|
|
impl Default for Settings {
|
|
fn default() -> Self {
|
|
Settings {
|
|
address: DEFAULT_ADDRESS.into(),
|
|
port: DEFAULT_PORT,
|
|
stream_key: None,
|
|
}
|
|
}
|
|
}
|
|
|
|
static PROPERTIES: [subclass::Property; 3] = [
|
|
subclass::Property("address", |name| {
|
|
glib::ParamSpec::string(
|
|
name,
|
|
"Address",
|
|
"The address the server should listen for incoming connections",
|
|
DEFAULT_ADDRESS.into(),
|
|
glib::ParamFlags::READWRITE,
|
|
)
|
|
}),
|
|
subclass::Property("port", |name| {
|
|
glib::ParamSpec::uint(
|
|
name,
|
|
"Port",
|
|
"The port that the server should bind to",
|
|
1000,
|
|
u32::MAX,
|
|
DEFAULT_PORT,
|
|
glib::ParamFlags::READWRITE,
|
|
)
|
|
}),
|
|
subclass::Property("stream_key", |name| {
|
|
glib::ParamSpec::string(
|
|
name,
|
|
"Stream Key",
|
|
"The stream key to expect content to be published",
|
|
DEFAULT_ADDRESS.into(),
|
|
glib::ParamFlags::READWRITE,
|
|
)
|
|
}),
|
|
];
|
|
|
|
#[derive(Debug)]
|
|
enum State {
|
|
Stopped,
|
|
Started {
|
|
source: Receiver<RtmpInput>,
|
|
position: u64,
|
|
video_caps: Option<gst::Caps>,
|
|
audio_caps: Option<gst::Caps>,
|
|
},
|
|
}
|
|
|
|
impl Default for State {
|
|
fn default() -> Self {
|
|
State::Stopped
|
|
}
|
|
}
|
|
|
|
pub struct RtmpSvrSrc {
|
|
settings: Mutex<Settings>,
|
|
state: Mutex<State>,
|
|
}
|
|
|
|
impl ObjectSubclass for RtmpSvrSrc {
|
|
const NAME: &'static str = "RtmpSvrSrc";
|
|
type Type = super::RtmpSrvSrc;
|
|
type ParentType = gst_base::PushSrc;
|
|
type Instance = gst::subclass::ElementInstanceStruct<Self>;
|
|
type Class = subclass::simple::ClassStruct<Self>;
|
|
|
|
glib::object_subclass!();
|
|
|
|
fn class_init(klass: &mut Self::Class) {
|
|
klass.set_metadata(
|
|
"RTMP Server Source",
|
|
"Source/Video",
|
|
"Creates a server capable of receiving a RTMP stream",
|
|
"Rafael Caricio <rafael@caricio.com>",
|
|
);
|
|
|
|
let caps = gst::Caps::new_any();
|
|
let src_pad_template = gst::PadTemplate::new(
|
|
"src",
|
|
gst::PadDirection::Src,
|
|
gst::PadPresence::Always,
|
|
&caps,
|
|
)
|
|
.unwrap();
|
|
klass.add_pad_template(src_pad_template);
|
|
|
|
klass.install_properties(&PROPERTIES);
|
|
}
|
|
|
|
fn new() -> Self {
|
|
Self {
|
|
settings: Mutex::new(Default::default()),
|
|
state: Mutex::new(Default::default()),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ObjectImpl for RtmpSvrSrc {
|
|
fn set_property(&self, obj: &Self::Type, id: usize, value: &glib::Value) {
|
|
let prop = &PROPERTIES[id];
|
|
match *prop {
|
|
subclass::Property("address", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
let address = value
|
|
.get()
|
|
.expect("type checked upstream")
|
|
.unwrap_or_else(|| DEFAULT_ADDRESS)
|
|
.into();
|
|
settings.address = address;
|
|
gst_debug!(CAT, obj: obj, "Set address to: {}", settings.address);
|
|
}
|
|
subclass::Property("port", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
let port = value.get_some().expect("type checked upstream");
|
|
settings.port = port;
|
|
gst_debug!(CAT, obj: obj, "Set port to: {}", port);
|
|
}
|
|
_ => unimplemented!(),
|
|
};
|
|
}
|
|
|
|
fn get_property(&self, obj: &Self::Type, id: usize) -> glib::Value {
|
|
let prop = &PROPERTIES[id];
|
|
match *prop {
|
|
subclass::Property("address", ..) => {
|
|
let settings = self.settings.lock().unwrap();
|
|
settings.address.to_value()
|
|
}
|
|
subclass::Property("port", ..) => {
|
|
let settings = self.settings.lock().unwrap();
|
|
settings.port.to_value()
|
|
}
|
|
_ => unimplemented!(),
|
|
}
|
|
}
|
|
|
|
fn constructed(&self, obj: &Self::Type) {
|
|
self.parent_constructed(obj);
|
|
obj.set_live(true); // this is always a live source!
|
|
obj.set_automatic_eos(false);
|
|
obj.set_format(gst::Format::Bytes);
|
|
}
|
|
}
|
|
|
|
impl ElementImpl for RtmpSvrSrc {}
|
|
|
|
impl BaseSrcImpl for RtmpSvrSrc {
|
|
fn start(&self, src: &Self::Type) -> Result<(), gst::ErrorMessage> {
|
|
// TODO: Here we start the server..
|
|
// TODO: consider sharing context with other gst elements
|
|
// - Create a socket
|
|
|
|
let (media_sender, media_receiver) = channel();
|
|
let mut state = self.state.lock().unwrap();
|
|
if let State::Started { .. } = *state {
|
|
return Ok(());
|
|
}
|
|
|
|
let settings = self.settings.lock().unwrap();
|
|
let address = format!("{}:{}", settings.address, settings.port);
|
|
let listener = TcpListener::bind(&address).map_err(|err| {
|
|
gst::error_msg!(
|
|
gst::ResourceError::Busy,
|
|
["Failed to bind to address {}: {}", address, err]
|
|
)
|
|
})?;
|
|
|
|
let (connection_sender, connection_receiver) = channel();
|
|
|
|
// TODO: Capture the join handle and use it to gracefully shutdown
|
|
thread::spawn(|| handle_connections(media_sender, connection_receiver));
|
|
thread::spawn(|| accept_connections(connection_sender, listener));
|
|
*state = State::Started {
|
|
source: media_receiver,
|
|
position: 0,
|
|
video_caps: None,
|
|
audio_caps: None,
|
|
};
|
|
|
|
// - Create channel to receive data (metadata and media data)
|
|
// - Create a thread that handle connections
|
|
// - Wait for clients to connect
|
|
// - Whenever a client connects and starts sending content
|
|
// - When a Connection is active, we can "start" the RtmpSvrSrc to publish buffers of
|
|
// content to the stream.
|
|
Ok(())
|
|
}
|
|
|
|
fn stop(&self, src: &Self::Type) -> Result<(), gst::ErrorMessage> {
|
|
gst_debug!(CAT, obj: src, "Stopping");
|
|
// TODO: Here we stop the server
|
|
// - Notify the server to stop accepting connections
|
|
// - Notify the connections the stream ended
|
|
let mut state = self.state.lock().unwrap();
|
|
*state = State::Stopped;
|
|
Ok(())
|
|
}
|
|
|
|
fn is_seekable(&self, _src: &Self::Type) -> bool {
|
|
// We cannot go back to previous content
|
|
false
|
|
}
|
|
|
|
fn query(&self, element: &Self::Type, query: &mut gst::QueryRef) -> bool {
|
|
use gst::QueryView;
|
|
|
|
match query.view_mut() {
|
|
QueryView::Scheduling(ref mut q) => {
|
|
q.set(
|
|
gst::SchedulingFlags::SEQUENTIAL | gst::SchedulingFlags::BANDWIDTH_LIMITED,
|
|
1,
|
|
-1,
|
|
0,
|
|
);
|
|
q.add_scheduling_modes(&[gst::PadMode::Push]);
|
|
true
|
|
}
|
|
_ => BaseSrcImplExt::parent_query(self, element, query),
|
|
}
|
|
}
|
|
|
|
fn unlock(&self, _src: &Self::Type) -> Result<(), gst::ErrorMessage> {
|
|
// TODO: Here we abort the server
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl PushSrcImpl for RtmpSvrSrc {
|
|
fn create(&self, src: &Self::Type) -> Result<gst::Buffer, gst::FlowError> {
|
|
let mut state = self.state.lock().unwrap();
|
|
let (source, position, video_caps, audio_caps) = match *state {
|
|
State::Stopped => {
|
|
gst::element_error!(src, gst::LibraryError::Failed, ["Not started yet"]);
|
|
return Err(gst::FlowError::Error);
|
|
}
|
|
State::Started {
|
|
ref source,
|
|
ref mut position,
|
|
ref mut video_caps,
|
|
ref mut audio_caps,
|
|
} => (source, position, video_caps, audio_caps),
|
|
};
|
|
|
|
loop {
|
|
let input = match source.try_recv() {
|
|
Result::Ok(i) => i,
|
|
Result::Err(TryRecvError::Empty) => continue, // blocks waiting for content
|
|
Result::Err(TryRecvError::Disconnected) => {
|
|
return Err(gst::FlowError::Eos);
|
|
}
|
|
};
|
|
|
|
match input {
|
|
RtmpInput::Metadata(metadata) => {
|
|
println!("Metadata: {:?}", metadata);
|
|
|
|
// TODO: check for the actual format, do not just assume
|
|
let mut caps = gst::Caps::builder("video/x-flv");
|
|
//gst::Caps::builder("video/x-h264").field("stream-format", &"avc");
|
|
|
|
if let Some(val) = metadata.video_height {
|
|
caps = caps.field("height", &val);
|
|
}
|
|
if let Some(val) = metadata.video_width {
|
|
caps = caps.field("width", &val);
|
|
}
|
|
if let Some(val) = metadata.video_frame_rate {
|
|
caps = caps.field("framerate", &val);
|
|
}
|
|
|
|
*video_caps = Some(caps.build());
|
|
|
|
// TODO: check for the actual format, do not just assume acc
|
|
let mut caps = gst::Caps::builder("audio/mpeg")
|
|
.field("mpegversion", &4i32)
|
|
.field("framed", &true)
|
|
.field("stream-format", &"raw");
|
|
|
|
if let Some(val) = metadata.audio_channels {
|
|
caps = caps.field("channels", &val);
|
|
}
|
|
if let Some(val) = metadata.audio_sample_rate {
|
|
caps = caps.field("rate", &val);
|
|
}
|
|
|
|
*audio_caps = Some(caps.build());
|
|
}
|
|
RtmpInput::Media(media) => {
|
|
// TODO: Decide what to set based on content
|
|
if let (MediaType::Video, Some(video_caps)) =
|
|
(media.media_type, video_caps.as_ref())
|
|
{
|
|
gst_info!(CAT, obj: src, "Setting {:?}", video_caps);
|
|
src.set_caps(video_caps)
|
|
.map_err(|_| gst::FlowError::NotNegotiated)?;
|
|
|
|
// let templ = src.get_element_class().get_pad_template("video").unwrap();
|
|
|
|
let chunk = media.data;
|
|
// Here we return the buffer
|
|
let size = chunk.len();
|
|
assert_ne!(chunk.len(), 0);
|
|
|
|
let offset = *position;
|
|
*position += size as u64;
|
|
|
|
gst_info!(
|
|
CAT,
|
|
obj: src,
|
|
"Chunk of {} bytes received at offset {}",
|
|
chunk.len(),
|
|
offset
|
|
);
|
|
|
|
let mut buffer = gst::Buffer::from_slice(chunk);
|
|
|
|
{
|
|
let buffer = buffer.get_mut().unwrap();
|
|
buffer.set_offset(offset);
|
|
buffer.set_offset_end(offset + size as u64);
|
|
}
|
|
|
|
return Ok(buffer);
|
|
}
|
|
// TODO: Handle Audio content
|
|
}
|
|
}
|
|
}
|
|
|
|
gst::element_error!(src, gst::LibraryError::TooLazy, ["No content yet"]);
|
|
return Err(gst::FlowError::Error);
|
|
}
|
|
}
|
|
|
|
/// Accepts TCP connections
|
|
fn accept_connections(connection_sender: Sender<TcpStream>, listener: TcpListener) {
|
|
println!("Listening for connections...");
|
|
for stream in listener.incoming() {
|
|
println!("New connection!");
|
|
match connection_sender.send(stream.unwrap()) {
|
|
Ok(_) => (),
|
|
Err(error) => panic!("Error sending stream to connection handler: {:?}", error),
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Handle the lifecycle of all TCP connections by sending and receiving data
|
|
fn handle_connections(media_sink: Sender<RtmpInput>, connection_receiver: Receiver<TcpStream>) {
|
|
let mut connections = Slab::new();
|
|
let mut connection_ids = HashSet::new();
|
|
let mut server = Server::new(media_sink);
|
|
|
|
loop {
|
|
match connection_receiver.try_recv() {
|
|
Err(TryRecvError::Disconnected) => panic!("Connection receiver closed"),
|
|
Err(TryRecvError::Empty) => (),
|
|
Ok(stream) => {
|
|
let connection = Connection::new(stream);
|
|
let id = connections.insert(connection);
|
|
let connection = connections.get_mut(id).unwrap();
|
|
connection.connection_id = Some(id);
|
|
connection_ids.insert(id);
|
|
|
|
println!("Connection {} started", id);
|
|
}
|
|
}
|
|
|
|
let mut ids_to_clear = Vec::new();
|
|
let mut packets_to_write = Vec::new();
|
|
for connection_id in &connection_ids {
|
|
let connection = connections.get_mut(*connection_id).unwrap();
|
|
match connection.read() {
|
|
Err(ConnectionError::SocketClosed) => {
|
|
println!("Socket closed for id {}", connection_id);
|
|
ids_to_clear.push(*connection_id);
|
|
}
|
|
|
|
Err(error) => {
|
|
println!(
|
|
"I/O error while reading connection {}: {:?}",
|
|
connection_id, error
|
|
);
|
|
ids_to_clear.push(*connection_id);
|
|
}
|
|
|
|
Ok(result) => match result {
|
|
ReadResult::NoBytesReceived => (),
|
|
ReadResult::HandshakingInProgress => (),
|
|
ReadResult::BytesReceived { buffer, byte_count } => {
|
|
let mut server_results =
|
|
match server.bytes_received(*connection_id, &buffer[..byte_count]) {
|
|
Ok(results) => results,
|
|
Err(error) => {
|
|
println!("Input caused the following server error: {}", error);
|
|
ids_to_clear.push(*connection_id);
|
|
continue;
|
|
}
|
|
};
|
|
|
|
for result in server_results.drain(..) {
|
|
match result {
|
|
ServerResult::OutboundPacket {
|
|
target_connection_id,
|
|
packet,
|
|
} => {
|
|
packets_to_write.push((target_connection_id, packet));
|
|
}
|
|
|
|
ServerResult::DisconnectConnection {
|
|
connection_id: id_to_close,
|
|
} => {
|
|
ids_to_clear.push(id_to_close);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
}
|
|
}
|
|
|
|
for (connection_id, packet) in packets_to_write.drain(..) {
|
|
let connection = connections.get_mut(connection_id).unwrap();
|
|
connection.write(packet.bytes);
|
|
}
|
|
|
|
for closed_id in ids_to_clear {
|
|
println!("Connection {} closed", closed_id);
|
|
connection_ids.remove(&closed_id);
|
|
connections.remove(closed_id);
|
|
server.notify_connection_closed(closed_id);
|
|
}
|
|
}
|
|
}
|