mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-09-27 14:30:27 +00:00
749 lines
24 KiB
Rust
749 lines
24 KiB
Rust
// Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.com>
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// Copyright (C) 2018 LEE Dongjun <redongjun@gmail.com>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the
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// Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
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// Boston, MA 02110-1335, USA.
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use glib;
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use glib::prelude::*;
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use glib::subclass;
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use glib::subclass::prelude::*;
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use gst;
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use gst::prelude::*;
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use gst::subclass::prelude::*;
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use std::io;
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use std::sync::Mutex;
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use std::u16;
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use futures;
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use futures::future;
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use futures::{Async, Future, Poll};
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use tokio::io::AsyncRead;
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use tokio::net;
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use either::Either;
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use rand;
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use iocontext::*;
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use socket::*;
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const DEFAULT_ADDRESS: Option<&str> = Some("127.0.0.1");
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const DEFAULT_PORT: u32 = 5000;
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const DEFAULT_CAPS: Option<gst::Caps> = None;
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const DEFAULT_CHUNK_SIZE: u32 = 4096;
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const DEFAULT_CONTEXT: &str = "";
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const DEFAULT_CONTEXT_WAIT: u32 = 0;
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#[derive(Debug, Clone)]
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struct Settings {
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address: Option<String>,
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port: u32,
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caps: Option<gst::Caps>,
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chunk_size: u32,
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context: String,
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context_wait: u32,
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}
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impl Default for Settings {
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fn default() -> Self {
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Settings {
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address: DEFAULT_ADDRESS.map(Into::into),
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port: DEFAULT_PORT,
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caps: DEFAULT_CAPS,
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chunk_size: DEFAULT_CHUNK_SIZE,
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context: DEFAULT_CONTEXT.into(),
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context_wait: DEFAULT_CONTEXT_WAIT,
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}
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}
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}
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static PROPERTIES: [subclass::Property; 6] = [
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subclass::Property("address", |name| {
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glib::ParamSpec::string(
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name,
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"Address",
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"Address to receive packets from",
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DEFAULT_ADDRESS,
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glib::ParamFlags::READWRITE,
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)
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}),
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subclass::Property("port", |name| {
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glib::ParamSpec::uint(
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name,
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"Port",
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"Port to receive packets from",
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0,
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u16::MAX as u32,
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DEFAULT_PORT,
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glib::ParamFlags::READWRITE,
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)
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}),
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subclass::Property("caps", |name| {
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glib::ParamSpec::boxed(
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name,
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"Caps",
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"Caps to use",
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gst::Caps::static_type(),
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glib::ParamFlags::READWRITE,
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)
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}),
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subclass::Property("chunk-size", |name| {
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glib::ParamSpec::uint(
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name,
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"Chunk Size",
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"Chunk Size",
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0,
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u16::MAX as u32,
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DEFAULT_CHUNK_SIZE,
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glib::ParamFlags::READWRITE,
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)
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}),
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subclass::Property("context", |name| {
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glib::ParamSpec::string(
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name,
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"Context",
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"Context name to share threads with",
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Some(DEFAULT_CONTEXT),
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glib::ParamFlags::READWRITE,
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)
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}),
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subclass::Property("context-wait", |name| {
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glib::ParamSpec::uint(
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name,
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"Context Wait",
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"Throttle poll loop to run at most once every this many ms",
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0,
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1000,
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DEFAULT_CONTEXT_WAIT,
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glib::ParamFlags::READWRITE,
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)
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}),
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];
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pub struct TcpClientReader {
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connect_future: net::tcp::ConnectFuture,
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socket: Option<net::TcpStream>,
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}
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impl TcpClientReader {
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pub fn new(connect_future: net::tcp::ConnectFuture) -> Self {
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Self {
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connect_future,
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socket: None,
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}
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}
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}
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impl SocketRead for TcpClientReader {
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const DO_TIMESTAMP: bool = false;
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fn poll_read(&mut self, buf: &mut [u8]) -> Poll<usize, io::Error> {
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let socket = match self.socket {
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Some(ref mut socket) => socket,
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None => match self.connect_future.poll() {
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Ok(Async::Ready(stream)) => {
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self.socket = Some(stream);
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self.socket.as_mut().unwrap()
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}
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Err(err) => {
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return Err(err);
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}
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_ => return Ok(Async::NotReady),
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},
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};
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socket.poll_read(buf)
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}
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}
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struct State {
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io_context: Option<IOContext>,
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pending_future_id: Option<PendingFutureId>,
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socket: Option<Socket<TcpClientReader>>,
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need_initial_events: bool,
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configured_caps: Option<gst::Caps>,
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pending_future_cancel: Option<futures::sync::oneshot::Sender<()>>,
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}
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impl Default for State {
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fn default() -> State {
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State {
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io_context: None,
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pending_future_id: None,
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socket: None,
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need_initial_events: true,
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configured_caps: None,
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pending_future_cancel: None,
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}
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}
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}
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struct TcpClientSrc {
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cat: gst::DebugCategory,
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src_pad: gst::Pad,
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state: Mutex<State>,
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settings: Mutex<Settings>,
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}
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impl TcpClientSrc {
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fn src_event(&self, pad: &gst::Pad, element: &gst::Element, event: gst::Event) -> bool {
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use gst::EventView;
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gst_log!(self.cat, obj: pad, "Handling event {:?}", event);
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let ret = match event.view() {
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EventView::FlushStart(..) => {
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let _ = self.stop(element);
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true
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}
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EventView::FlushStop(..) => {
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let (res, state, pending) = element.get_state(0.into());
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if res == Ok(gst::StateChangeSuccess::Success) && state == gst::State::Playing
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|| res == Ok(gst::StateChangeSuccess::Async) && pending == gst::State::Playing
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{
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let _ = self.start(element);
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}
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true
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}
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EventView::Reconfigure(..) => true,
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EventView::Latency(..) => true,
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_ => false,
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};
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if ret {
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gst_log!(self.cat, obj: pad, "Handled event {:?}", event);
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} else {
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gst_log!(self.cat, obj: pad, "Didn't handle event {:?}", event);
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}
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ret
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}
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fn src_query(
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&self,
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pad: &gst::Pad,
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_element: &gst::Element,
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query: &mut gst::QueryRef,
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) -> bool {
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use gst::QueryView;
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gst_log!(self.cat, obj: pad, "Handling query {:?}", query);
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let ret = match query.view_mut() {
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QueryView::Latency(ref mut q) => {
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q.set(false, 0.into(), 0.into());
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true
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}
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QueryView::Scheduling(ref mut q) => {
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q.set(gst::SchedulingFlags::SEQUENTIAL, 1, -1, 0);
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q.add_scheduling_modes(&[gst::PadMode::Push]);
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true
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}
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QueryView::Caps(ref mut q) => {
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let state = self.state.lock().unwrap();
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let caps = if let Some(ref caps) = state.configured_caps {
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q.get_filter()
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.map(|f| f.intersect_with_mode(caps, gst::CapsIntersectMode::First))
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.unwrap_or_else(|| caps.clone())
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} else {
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q.get_filter()
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.map(|f| f.to_owned())
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.unwrap_or_else(|| gst::Caps::new_any())
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};
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q.set_result(&caps);
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true
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}
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_ => false,
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};
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if ret {
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gst_log!(self.cat, obj: pad, "Handled query {:?}", query);
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} else {
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gst_log!(self.cat, obj: pad, "Didn't handle query {:?}", query);
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}
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ret
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}
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fn create_io_context_event(state: &State) -> Option<gst::Event> {
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if let (&Some(ref pending_future_id), &Some(ref io_context)) =
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(&state.pending_future_id, &state.io_context)
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{
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let s = gst::Structure::new(
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"ts-io-context",
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&[
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("io-context", &io_context),
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("pending-future-id", &*pending_future_id),
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],
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);
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Some(gst::Event::new_custom_downstream_sticky(s).build())
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} else {
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None
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}
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}
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fn push_buffer(
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&self,
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element: &gst::Element,
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buffer: gst::Buffer,
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) -> future::Either<
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Box<Future<Item = (), Error = gst::FlowError> + Send + 'static>,
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future::FutureResult<(), gst::FlowError>,
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> {
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let mut events = Vec::new();
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let mut state = self.state.lock().unwrap();
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if state.need_initial_events {
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gst_debug!(self.cat, obj: element, "Pushing initial events");
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let stream_id = format!("{:08x}{:08x}", rand::random::<u32>(), rand::random::<u32>());
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events.push(gst::Event::new_stream_start(&stream_id).build());
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if let Some(ref caps) = self.settings.lock().unwrap().caps {
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events.push(gst::Event::new_caps(&caps).build());
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state.configured_caps = Some(caps.clone());
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}
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events.push(
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gst::Event::new_segment(&gst::FormattedSegment::<gst::format::Time>::new()).build(),
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);
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if let Some(event) = Self::create_io_context_event(&state) {
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events.push(event);
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// Get rid of reconfigure flag
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self.src_pad.check_reconfigure();
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}
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state.need_initial_events = false;
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} else if self.src_pad.check_reconfigure() {
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if let Some(event) = Self::create_io_context_event(&state) {
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events.push(event);
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}
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}
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if buffer.get_size() == 0 {
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events.push(gst::Event::new_eos().build());
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}
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drop(state);
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for event in events {
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self.src_pad.push_event(event);
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}
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let res = match self.src_pad.push(buffer) {
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Ok(_) => {
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gst_log!(self.cat, obj: element, "Successfully pushed buffer");
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Ok(())
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}
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Err(gst::FlowError::Flushing) => {
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gst_debug!(self.cat, obj: element, "Flushing");
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let state = self.state.lock().unwrap();
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if let Some(ref socket) = state.socket {
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socket.pause();
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}
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Ok(())
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}
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Err(gst::FlowError::Eos) => {
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gst_debug!(self.cat, obj: element, "EOS");
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let state = self.state.lock().unwrap();
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if let Some(ref socket) = state.socket {
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socket.pause();
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}
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Ok(())
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}
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Err(err) => {
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gst_error!(self.cat, obj: element, "Got error {}", err);
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gst_element_error!(
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element,
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gst::StreamError::Failed,
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("Internal data stream error"),
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["streaming stopped, reason {}", err]
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);
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Err(gst::FlowError::CustomError)
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}
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};
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match res {
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Ok(()) => {
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let mut state = self.state.lock().unwrap();
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if let State {
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io_context: Some(ref io_context),
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pending_future_id: Some(ref pending_future_id),
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ref mut pending_future_cancel,
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..
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} = *state
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{
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let (cancel, future) = io_context.drain_pending_futures(*pending_future_id);
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*pending_future_cancel = cancel;
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future
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} else {
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future::Either::B(future::ok(()))
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}
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}
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Err(err) => future::Either::B(future::err(err)),
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}
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}
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fn prepare(&self, element: &gst::Element) -> Result<(), gst::ErrorMessage> {
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use std::net::{IpAddr, SocketAddr};
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gst_debug!(self.cat, obj: element, "Preparing");
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let settings = self.settings.lock().unwrap().clone();
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let mut state = self.state.lock().unwrap();
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let io_context =
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IOContext::new(&settings.context, settings.context_wait).map_err(|err| {
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gst_error_msg!(
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gst::ResourceError::OpenRead,
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["Failed to create IO context: {}", err]
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)
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})?;
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let addr: IpAddr = match settings.address {
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None => {
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return Err(gst_error_msg!(
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gst::ResourceError::Settings,
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["No address set"]
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));
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}
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Some(ref addr) => match addr.parse() {
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Err(err) => {
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return Err(gst_error_msg!(
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gst::ResourceError::Settings,
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["Invalid address '{}' set: {}", addr, err]
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));
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}
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Ok(addr) => addr,
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},
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};
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let port = settings.port;
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let saddr = SocketAddr::new(addr, port as u16);
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gst_debug!(self.cat, obj: element, "Connecting to {:?}", saddr);
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let socket = net::TcpStream::connect(&saddr);
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let buffer_pool = gst::BufferPool::new();
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let mut config = buffer_pool.get_config();
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config.set_params(None, settings.chunk_size, 0, 0);
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buffer_pool.set_config(config).map_err(|_| {
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gst_error_msg!(
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gst::ResourceError::Settings,
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["Failed to configure buffer pool"]
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)
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})?;
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let socket = Socket::new(
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element.upcast_ref(),
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TcpClientReader::new(socket),
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buffer_pool,
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);
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let element_clone = element.clone();
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let element_clone2 = element.clone();
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socket
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.schedule(
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&io_context,
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move |buffer| {
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let tcpclientsrc = Self::from_instance(&element_clone);
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tcpclientsrc.push_buffer(&element_clone, buffer)
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},
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move |err| {
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let tcpclientsrc = Self::from_instance(&element_clone2);
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gst_error!(tcpclientsrc.cat, obj: &element_clone2, "Got error {}", err);
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match err {
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Either::Left(gst::FlowError::CustomError) => (),
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Either::Left(err) => {
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gst_element_error!(
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element_clone2,
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gst::StreamError::Failed,
|
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("Internal data stream error"),
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["streaming stopped, reason {}", err]
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);
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}
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Either::Right(err) => {
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gst_element_error!(
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element_clone2,
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gst::StreamError::Failed,
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("I/O error"),
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["streaming stopped, I/O error {}", err]
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);
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}
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}
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},
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)
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.map_err(|_| {
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gst_error_msg!(gst::ResourceError::OpenRead, ["Failed to schedule socket"])
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})?;
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let pending_future_id = io_context.acquire_pending_future_id();
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gst_debug!(
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self.cat,
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obj: element,
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"Got pending future id {:?}",
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pending_future_id
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);
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state.socket = Some(socket);
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state.io_context = Some(io_context);
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state.pending_future_id = Some(pending_future_id);
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|
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gst_debug!(self.cat, obj: element, "Prepared");
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Ok(())
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}
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|
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fn unprepare(&self, element: &gst::Element) -> Result<(), ()> {
|
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gst_debug!(self.cat, obj: element, "Unpreparing");
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|
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// FIXME: The IO Context has to be alive longer than the queue,
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// otherwise the queue can't finish any remaining work
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let (mut socket, io_context) = {
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let mut state = self.state.lock().unwrap();
|
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|
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if let (&Some(ref pending_future_id), &Some(ref io_context)) =
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(&state.pending_future_id, &state.io_context)
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{
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io_context.release_pending_future_id(*pending_future_id);
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}
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|
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let socket = state.socket.take();
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let io_context = state.io_context.take();
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*state = State::default();
|
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(socket, io_context)
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};
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|
|
if let Some(ref socket) = socket.take() {
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socket.shutdown();
|
|
}
|
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drop(io_context);
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|
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gst_debug!(self.cat, obj: element, "Unprepared");
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Ok(())
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}
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|
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fn start(&self, element: &gst::Element) -> Result<(), ()> {
|
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gst_debug!(self.cat, obj: element, "Starting");
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let state = self.state.lock().unwrap();
|
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|
|
if let Some(ref socket) = state.socket {
|
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socket.unpause(None, None);
|
|
}
|
|
|
|
gst_debug!(self.cat, obj: element, "Started");
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn stop(&self, element: &gst::Element) -> Result<(), ()> {
|
|
gst_debug!(self.cat, obj: element, "Stopping");
|
|
let mut state = self.state.lock().unwrap();
|
|
|
|
if let Some(ref socket) = state.socket {
|
|
socket.pause();
|
|
}
|
|
let _ = state.pending_future_cancel.take();
|
|
|
|
gst_debug!(self.cat, obj: element, "Stopped");
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl ObjectSubclass for TcpClientSrc {
|
|
const NAME: &'static str = "RsTsTcpClientSrc";
|
|
type ParentType = gst::Element;
|
|
type Instance = gst::subclass::ElementInstanceStruct<Self>;
|
|
type Class = subclass::simple::ClassStruct<Self>;
|
|
|
|
glib_object_subclass!();
|
|
|
|
fn class_init(klass: &mut subclass::simple::ClassStruct<Self>) {
|
|
klass.set_metadata(
|
|
"Thread-sharing TCP client source",
|
|
"Source/Network",
|
|
"Receives data over the network via TCP",
|
|
"Sebastian Dröge <sebastian@centricular.com>, LEE Dongjun <redongjun@gmail.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_with_class(klass: &subclass::simple::ClassStruct<Self>) -> Self {
|
|
let templ = klass.get_pad_template("src").unwrap();
|
|
let src_pad = gst::Pad::new_from_template(&templ, "src");
|
|
|
|
src_pad.set_event_function(|pad, parent, event| {
|
|
TcpClientSrc::catch_panic_pad_function(
|
|
parent,
|
|
|| false,
|
|
|tcpclientsrc, element| tcpclientsrc.src_event(pad, element, event),
|
|
)
|
|
});
|
|
src_pad.set_query_function(|pad, parent, query| {
|
|
TcpClientSrc::catch_panic_pad_function(
|
|
parent,
|
|
|| false,
|
|
|tcpclientsrc, element| tcpclientsrc.src_query(pad, element, query),
|
|
)
|
|
});
|
|
|
|
Self {
|
|
cat: gst::DebugCategory::new(
|
|
"ts-tcpclientsrc",
|
|
gst::DebugColorFlags::empty(),
|
|
"Thread-sharing TCP Client source",
|
|
),
|
|
src_pad,
|
|
state: Mutex::new(State::default()),
|
|
settings: Mutex::new(Settings::default()),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ObjectImpl for TcpClientSrc {
|
|
glib_object_impl!();
|
|
|
|
fn set_property(&self, _obj: &glib::Object, id: usize, value: &glib::Value) {
|
|
let prop = &PROPERTIES[id];
|
|
|
|
match *prop {
|
|
subclass::Property("address", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.address = value.get();
|
|
}
|
|
subclass::Property("port", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.port = value.get().unwrap();
|
|
}
|
|
subclass::Property("caps", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.caps = value.get();
|
|
}
|
|
subclass::Property("chunk-size", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.chunk_size = value.get().unwrap();
|
|
}
|
|
subclass::Property("context", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.context = value.get().unwrap_or_else(|| "".into());
|
|
}
|
|
subclass::Property("context-wait", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.context_wait = value.get().unwrap();
|
|
}
|
|
_ => unimplemented!(),
|
|
}
|
|
}
|
|
|
|
fn get_property(&self, _obj: &glib::Object, id: usize) -> Result<glib::Value, ()> {
|
|
let prop = &PROPERTIES[id];
|
|
|
|
match *prop {
|
|
subclass::Property("address", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
Ok(settings.address.to_value())
|
|
}
|
|
subclass::Property("port", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
Ok(settings.port.to_value())
|
|
}
|
|
subclass::Property("caps", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
Ok(settings.caps.to_value())
|
|
}
|
|
subclass::Property("chunk-size", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
Ok(settings.chunk_size.to_value())
|
|
}
|
|
subclass::Property("context", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
Ok(settings.context.to_value())
|
|
}
|
|
subclass::Property("context-wait", ..) => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
Ok(settings.context_wait.to_value())
|
|
}
|
|
_ => unimplemented!(),
|
|
}
|
|
}
|
|
|
|
fn constructed(&self, obj: &glib::Object) {
|
|
self.parent_constructed(obj);
|
|
|
|
let element = obj.downcast_ref::<gst::Element>().unwrap();
|
|
element.add_pad(&self.src_pad).unwrap();
|
|
|
|
::set_element_flags(element, gst::ElementFlags::SOURCE);
|
|
}
|
|
}
|
|
|
|
impl ElementImpl for TcpClientSrc {
|
|
fn change_state(
|
|
&self,
|
|
element: &gst::Element,
|
|
transition: gst::StateChange,
|
|
) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
|
|
gst_trace!(self.cat, obj: element, "Changing state {:?}", transition);
|
|
|
|
match transition {
|
|
gst::StateChange::NullToReady => {
|
|
self.prepare(element)
|
|
.map_err(|err| {
|
|
element.post_error_message(&err);
|
|
gst::StateChangeError
|
|
})
|
|
.and_then(|_| self.start(element).map_err(|_| gst::StateChangeError))?;
|
|
}
|
|
gst::StateChange::PlayingToPaused => {
|
|
self.stop(element)
|
|
.and_then(|_| self.unprepare(element))
|
|
.map_err(|_| gst::StateChangeError)?;
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
let mut success = self.parent_change_state(element, transition)?;
|
|
|
|
match transition {
|
|
gst::StateChange::ReadyToPaused => {
|
|
success = gst::StateChangeSuccess::Success;
|
|
}
|
|
gst::StateChange::PausedToReady => {
|
|
let mut state = self.state.lock().unwrap();
|
|
state.need_initial_events = true;
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
Ok(success)
|
|
}
|
|
}
|
|
|
|
pub fn register(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
|
|
gst::Element::register(plugin, "ts-tcpclientsrc", 0, TcpClientSrc::get_type())
|
|
}
|