mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-06-13 03:39:23 +00:00
757 lines
24 KiB
Rust
757 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 futures::future::BoxFuture;
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use futures::lock::Mutex as FutMutex;
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use futures::prelude::*;
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use glib::prelude::*;
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use glib::subclass::prelude::*;
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use gst::prelude::*;
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use gst::subclass::prelude::*;
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use gst::{gst_debug, gst_error, gst_log, gst_trace};
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use once_cell::sync::Lazy;
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use std::io;
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use std::net::{IpAddr, SocketAddr};
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use std::sync::Arc;
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use std::sync::Mutex as StdMutex;
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use std::u16;
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use std::u32;
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use tokio::io::AsyncReadExt;
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use crate::runtime::prelude::*;
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use crate::runtime::task;
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use crate::runtime::{Context, PadSrc, PadSrcRef, PadSrcWeak, Task, TaskState};
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use crate::socket::{Socket, SocketError, SocketRead};
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const DEFAULT_HOST: Option<&str> = Some("127.0.0.1");
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const DEFAULT_PORT: i32 = 4953;
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const DEFAULT_CAPS: Option<gst::Caps> = None;
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const DEFAULT_BLOCKSIZE: 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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host: Option<String>,
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port: i32,
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caps: Option<gst::Caps>,
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blocksize: 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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host: DEFAULT_HOST.map(Into::into),
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port: DEFAULT_PORT,
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caps: DEFAULT_CAPS,
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blocksize: DEFAULT_BLOCKSIZE,
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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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struct TcpClientReader(tokio::net::TcpStream);
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impl TcpClientReader {
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pub fn new(socket: tokio::net::TcpStream) -> Self {
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TcpClientReader(socket)
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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 read<'buf>(
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&'buf mut self,
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buffer: &'buf mut [u8],
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) -> BoxFuture<'buf, io::Result<(usize, Option<std::net::SocketAddr>)>> {
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async move { self.0.read(buffer).await.map(|read_size| (read_size, None)) }.boxed()
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}
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}
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#[derive(Debug)]
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struct TcpClientSrcPadHandlerState {
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need_initial_events: bool,
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need_segment: bool,
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caps: Option<gst::Caps>,
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}
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impl Default for TcpClientSrcPadHandlerState {
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fn default() -> Self {
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TcpClientSrcPadHandlerState {
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need_initial_events: true,
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need_segment: true,
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caps: None,
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}
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}
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}
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#[derive(Debug, Default)]
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struct TcpClientSrcPadHandlerInner {
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state: FutMutex<TcpClientSrcPadHandlerState>,
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configured_caps: StdMutex<Option<gst::Caps>>,
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}
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#[derive(Clone, Debug, Default)]
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struct TcpClientSrcPadHandler(Arc<TcpClientSrcPadHandlerInner>);
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impl TcpClientSrcPadHandler {
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fn prepare(&self, caps: Option<gst::Caps>) {
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self.0
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.state
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.try_lock()
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.expect("State locked elsewhere")
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.caps = caps;
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}
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async fn reset_state(&self) {
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*self.0.configured_caps.lock().unwrap() = None;
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}
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async fn set_need_segment(&self) {
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self.0.state.lock().await.need_segment = true;
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}
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async fn push_prelude(&self, pad: &PadSrcRef<'_>, _element: &super::TcpClientSrc) {
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let mut state = self.0.state.lock().await;
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if state.need_initial_events {
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gst_debug!(CAT, obj: pad.gst_pad(), "Pushing initial events");
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let stream_id = format!("{:08x}{:08x}", rand::random::<u32>(), rand::random::<u32>());
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let stream_start_evt = gst::event::StreamStart::builder(&stream_id)
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.group_id(gst::GroupId::next())
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.build();
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pad.push_event(stream_start_evt).await;
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if let Some(ref caps) = state.caps {
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pad.push_event(gst::event::Caps::new(&caps)).await;
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*self.0.configured_caps.lock().unwrap() = Some(caps.clone());
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}
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state.need_initial_events = false;
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}
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if state.need_segment {
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let segment_evt =
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gst::event::Segment::new(&gst::FormattedSegment::<gst::format::Time>::new());
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pad.push_event(segment_evt).await;
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state.need_segment = false;
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}
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}
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async fn push_buffer(
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&self,
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pad: &PadSrcRef<'_>,
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element: &super::TcpClientSrc,
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buffer: gst::Buffer,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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gst_log!(CAT, obj: pad.gst_pad(), "Handling {:?}", buffer);
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self.push_prelude(pad, element).await;
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if buffer.get_size() == 0 {
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pad.push_event(gst::event::Eos::new()).await;
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return Ok(gst::FlowSuccess::Ok);
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}
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pad.push(buffer).await
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}
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}
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impl PadSrcHandler for TcpClientSrcPadHandler {
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type ElementImpl = TcpClientSrc;
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fn src_event(
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&self,
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pad: &PadSrcRef,
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tcpclientsrc: &TcpClientSrc,
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_element: &gst::Element,
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event: gst::Event,
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) -> bool {
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use gst::EventView;
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gst_log!(CAT, obj: pad.gst_pad(), "Handling {:?}", event);
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let ret = match event.view() {
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EventView::FlushStart(..) => tcpclientsrc.task.flush_start().is_ok(),
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EventView::FlushStop(..) => tcpclientsrc.task.flush_stop().is_ok(),
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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!(CAT, obj: pad.gst_pad(), "Handled {:?}", event);
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} else {
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gst_log!(CAT, obj: pad.gst_pad(), "Didn't handle {:?}", 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: &PadSrcRef,
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_tcpclientsrc: &TcpClientSrc,
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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!(CAT, obj: pad.gst_pad(), "Handling {:?}", 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(), gst::CLOCK_TIME_NONE);
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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 caps = if let Some(caps) = self.0.configured_caps.lock().unwrap().as_ref() {
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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!(CAT, obj: pad.gst_pad(), "Handled {:?}", query);
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} else {
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gst_log!(CAT, obj: pad.gst_pad(), "Didn't handle {:?}", query);
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}
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ret
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}
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}
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struct TcpClientSrcTask {
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element: super::TcpClientSrc,
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src_pad: PadSrcWeak,
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src_pad_handler: TcpClientSrcPadHandler,
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saddr: SocketAddr,
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buffer_pool: Option<gst::BufferPool>,
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socket: Option<Socket<TcpClientReader>>,
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}
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impl TcpClientSrcTask {
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fn new(
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element: &super::TcpClientSrc,
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src_pad: &PadSrc,
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src_pad_handler: &TcpClientSrcPadHandler,
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saddr: SocketAddr,
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buffer_pool: gst::BufferPool,
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) -> Self {
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TcpClientSrcTask {
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element: element.clone(),
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src_pad: src_pad.downgrade(),
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src_pad_handler: src_pad_handler.clone(),
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saddr,
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buffer_pool: Some(buffer_pool),
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socket: None,
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}
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}
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}
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impl TaskImpl for TcpClientSrcTask {
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fn prepare(&mut self) -> BoxFuture<'_, Result<(), gst::ErrorMessage>> {
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async move {
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gst_log!(CAT, obj: &self.element, "Preparing task connecting to {:?}", self.saddr);
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let socket = tokio::net::TcpStream::connect(self.saddr)
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.await
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.map_err(|err| {
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gst::error_msg!(
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gst::ResourceError::OpenRead,
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["Failed to connect to {:?}: {:?}", self.saddr, err]
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)
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})?;
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self.socket = Some(
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Socket::try_new(
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self.element.clone().upcast(),
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self.buffer_pool.take().unwrap(),
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TcpClientReader::new(socket),
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)
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.map_err(|err| {
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gst::error_msg!(
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gst::ResourceError::OpenRead,
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["Failed to prepare socket {:?}", err]
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)
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})?,
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);
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gst_log!(CAT, obj: &self.element, "Task prepared");
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Ok(())
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}
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.boxed()
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}
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fn handle_action_error(
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&mut self,
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trigger: task::Trigger,
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state: TaskState,
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err: gst::ErrorMessage,
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) -> BoxFuture<'_, task::Trigger> {
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async move {
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match trigger {
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task::Trigger::Prepare => {
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gst_error!(CAT, "Task preparation failed: {:?}", err);
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self.element.post_error_message(err);
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task::Trigger::Error
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}
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other => unreachable!("Action error for {:?} in state {:?}", other, state),
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}
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}
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.boxed()
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}
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fn iterate(&mut self) -> BoxFuture<'_, Result<(), gst::FlowError>> {
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async move {
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let item = self.socket.as_mut().unwrap().next().await;
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let buffer = match item {
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Some(Ok((buffer, _))) => buffer,
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Some(Err(err)) => {
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gst_error!(CAT, obj: &self.element, "Got error {:?}", err);
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match err {
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SocketError::Gst(err) => {
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gst::element_error!(
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self.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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}
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SocketError::Io(err) => {
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gst::element_error!(
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self.element,
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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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return Err(gst::FlowError::Error);
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}
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None => {
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gst_log!(CAT, obj: &self.element, "SocketStream Stopped");
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return Err(gst::FlowError::Flushing);
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}
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};
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let pad = self.src_pad.upgrade().expect("PadSrc no longer exists");
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let res = self
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.src_pad_handler
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.push_buffer(&pad, &self.element, buffer)
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.await;
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match res {
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Ok(_) => {
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gst_log!(CAT, obj: &self.element, "Successfully pushed buffer");
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}
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Err(gst::FlowError::Flushing) => {
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gst_debug!(CAT, obj: &self.element, "Flushing");
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}
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Err(gst::FlowError::Eos) => {
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gst_debug!(CAT, obj: &self.element, "EOS");
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pad.push_event(gst::event::Eos::new()).await;
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}
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Err(err) => {
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gst_error!(CAT, obj: &self.element, "Got error {}", err);
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gst::element_error!(
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self.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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}
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}
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res.map(drop)
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}
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.boxed()
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}
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fn stop(&mut self) -> BoxFuture<'_, Result<(), gst::ErrorMessage>> {
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async move {
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gst_log!(CAT, obj: &self.element, "Stopping task");
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self.src_pad_handler.reset_state().await;
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gst_log!(CAT, obj: &self.element, "Task stopped");
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Ok(())
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}
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.boxed()
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}
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fn flush_stop(&mut self) -> BoxFuture<'_, Result<(), gst::ErrorMessage>> {
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async move {
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gst_log!(CAT, obj: &self.element, "Stopping task flush");
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self.src_pad_handler.set_need_segment().await;
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gst_log!(CAT, obj: &self.element, "Task flush stopped");
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Ok(())
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}
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.boxed()
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}
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}
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pub struct TcpClientSrc {
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src_pad: PadSrc,
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src_pad_handler: TcpClientSrcPadHandler,
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task: Task,
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settings: StdMutex<Settings>,
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}
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static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
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gst::DebugCategory::new(
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"ts-tcpclientsrc",
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gst::DebugColorFlags::empty(),
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Some("Thread-sharing TCP Client source"),
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)
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});
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impl TcpClientSrc {
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fn prepare(&self, element: &super::TcpClientSrc) -> Result<(), gst::ErrorMessage> {
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let settings = self.settings.lock().unwrap().clone();
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gst_debug!(CAT, obj: element, "Preparing");
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let context =
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Context::acquire(&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 acquire Context: {}", err]
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)
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})?;
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let host: IpAddr = match settings.host {
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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 host set"]
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));
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}
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Some(ref host) => match host.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 host '{}' set: {}", host, err]
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));
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}
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Ok(host) => host,
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},
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};
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let port = settings.port;
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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.blocksize, 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 saddr = SocketAddr::new(host, port as u16);
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self.src_pad_handler.prepare(settings.caps);
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self.task
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.prepare(
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TcpClientSrcTask::new(
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element,
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&self.src_pad,
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&self.src_pad_handler,
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saddr,
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buffer_pool,
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),
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context,
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)
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.map_err(|err| {
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gst::error_msg!(
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gst::ResourceError::OpenRead,
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["Error preparing Task: {:?}", err]
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)
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})?;
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gst_debug!(CAT, obj: element, "Prepared");
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Ok(())
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}
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fn unprepare(&self, element: &super::TcpClientSrc) {
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gst_debug!(CAT, obj: element, "Unpreparing");
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self.task.unprepare().unwrap();
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gst_debug!(CAT, obj: element, "Unprepared");
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}
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fn stop(&self, element: &super::TcpClientSrc) -> Result<(), gst::ErrorMessage> {
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gst_debug!(CAT, obj: element, "Stopping");
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self.task.stop()?;
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gst_debug!(CAT, obj: element, "Stopped");
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Ok(())
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}
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fn start(&self, element: &super::TcpClientSrc) -> Result<(), gst::ErrorMessage> {
|
|
gst_debug!(CAT, obj: element, "Starting");
|
|
self.task.start()?;
|
|
gst_debug!(CAT, obj: element, "Started");
|
|
Ok(())
|
|
}
|
|
|
|
fn pause(&self, element: &super::TcpClientSrc) -> Result<(), gst::ErrorMessage> {
|
|
gst_debug!(CAT, obj: element, "Pausing");
|
|
self.task.pause()?;
|
|
gst_debug!(CAT, obj: element, "Paused");
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
#[glib::object_subclass]
|
|
impl ObjectSubclass for TcpClientSrc {
|
|
const NAME: &'static str = "RsTsTcpClientSrc";
|
|
type Type = super::TcpClientSrc;
|
|
type ParentType = gst::Element;
|
|
|
|
fn with_class(klass: &Self::Class) -> Self {
|
|
let src_pad_handler = TcpClientSrcPadHandler::default();
|
|
|
|
Self {
|
|
src_pad: PadSrc::new(
|
|
gst::Pad::from_template(&klass.get_pad_template("src").unwrap(), Some("src")),
|
|
src_pad_handler.clone(),
|
|
),
|
|
src_pad_handler,
|
|
task: Task::default(),
|
|
settings: StdMutex::new(Settings::default()),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ObjectImpl for TcpClientSrc {
|
|
fn properties() -> &'static [glib::ParamSpec] {
|
|
static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
|
|
vec![
|
|
glib::ParamSpec::string(
|
|
"context",
|
|
"Context",
|
|
"Context name to share threads with",
|
|
Some(DEFAULT_CONTEXT),
|
|
glib::ParamFlags::READWRITE,
|
|
),
|
|
glib::ParamSpec::uint(
|
|
"context-wait",
|
|
"Context Wait",
|
|
"Throttle poll loop to run at most once every this many ms",
|
|
0,
|
|
1000,
|
|
DEFAULT_CONTEXT_WAIT,
|
|
glib::ParamFlags::READWRITE,
|
|
),
|
|
glib::ParamSpec::string(
|
|
"host",
|
|
"Host",
|
|
"The host IP address to receive packets from",
|
|
DEFAULT_HOST,
|
|
glib::ParamFlags::READWRITE,
|
|
),
|
|
glib::ParamSpec::int(
|
|
"port",
|
|
"Port",
|
|
"Port to receive packets from",
|
|
0,
|
|
u16::MAX as i32,
|
|
DEFAULT_PORT,
|
|
glib::ParamFlags::READWRITE,
|
|
),
|
|
glib::ParamSpec::boxed(
|
|
"caps",
|
|
"Caps",
|
|
"Caps to use",
|
|
gst::Caps::static_type(),
|
|
glib::ParamFlags::READWRITE,
|
|
),
|
|
glib::ParamSpec::uint(
|
|
"blocksize",
|
|
"Blocksize",
|
|
"Size in bytes to read per buffer (-1 = default)",
|
|
0,
|
|
u32::MAX,
|
|
DEFAULT_BLOCKSIZE,
|
|
glib::ParamFlags::READWRITE,
|
|
),
|
|
]
|
|
});
|
|
|
|
PROPERTIES.as_ref()
|
|
}
|
|
|
|
fn set_property(
|
|
&self,
|
|
_obj: &Self::Type,
|
|
_id: usize,
|
|
value: &glib::Value,
|
|
pspec: &glib::ParamSpec,
|
|
) {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
match pspec.get_name() {
|
|
"host" => {
|
|
settings.host = value.get().expect("type checked upstream");
|
|
}
|
|
"port" => {
|
|
settings.port = value.get_some().expect("type checked upstream");
|
|
}
|
|
"caps" => {
|
|
settings.caps = value.get().expect("type checked upstream");
|
|
}
|
|
"blocksize" => {
|
|
settings.blocksize = value.get_some().expect("type checked upstream");
|
|
}
|
|
"context" => {
|
|
settings.context = value
|
|
.get()
|
|
.expect("type checked upstream")
|
|
.unwrap_or_else(|| "".into());
|
|
}
|
|
"context-wait" => {
|
|
settings.context_wait = value.get_some().expect("type checked upstream");
|
|
}
|
|
_ => unimplemented!(),
|
|
}
|
|
}
|
|
|
|
fn get_property(&self, _obj: &Self::Type, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
|
|
let settings = self.settings.lock().unwrap();
|
|
match pspec.get_name() {
|
|
"host" => settings.host.to_value(),
|
|
"port" => settings.port.to_value(),
|
|
"caps" => settings.caps.to_value(),
|
|
"blocksize" => settings.blocksize.to_value(),
|
|
"context" => settings.context.to_value(),
|
|
"context-wait" => settings.context_wait.to_value(),
|
|
_ => unimplemented!(),
|
|
}
|
|
}
|
|
|
|
fn constructed(&self, obj: &Self::Type) {
|
|
self.parent_constructed(obj);
|
|
|
|
obj.add_pad(self.src_pad.gst_pad()).unwrap();
|
|
|
|
crate::set_element_flags(obj, gst::ElementFlags::SOURCE);
|
|
}
|
|
}
|
|
|
|
impl ElementImpl for TcpClientSrc {
|
|
fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
|
|
static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
|
|
gst::subclass::ElementMetadata::new(
|
|
"Thread-sharing TCP client source",
|
|
"Source/Network",
|
|
"Receives data over the network via TCP",
|
|
"Sebastian Dröge <sebastian@centricular.com>, LEE Dongjun <redongjun@gmail.com>",
|
|
)
|
|
});
|
|
|
|
Some(&*ELEMENT_METADATA)
|
|
}
|
|
|
|
fn pad_templates() -> &'static [gst::PadTemplate] {
|
|
static PAD_TEMPLATES: Lazy<Vec<gst::PadTemplate>> = Lazy::new(|| {
|
|
let caps = gst::Caps::new_any();
|
|
let src_pad_template = gst::PadTemplate::new(
|
|
"src",
|
|
gst::PadDirection::Src,
|
|
gst::PadPresence::Always,
|
|
&caps,
|
|
)
|
|
.unwrap();
|
|
|
|
vec![src_pad_template]
|
|
});
|
|
|
|
PAD_TEMPLATES.as_ref()
|
|
}
|
|
|
|
fn change_state(
|
|
&self,
|
|
element: &Self::Type,
|
|
transition: gst::StateChange,
|
|
) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
|
|
gst_trace!(CAT, obj: element, "Changing state {:?}", transition);
|
|
|
|
match transition {
|
|
gst::StateChange::NullToReady => {
|
|
self.prepare(element).map_err(|err| {
|
|
element.post_error_message(err);
|
|
gst::StateChangeError
|
|
})?;
|
|
}
|
|
gst::StateChange::PlayingToPaused => {
|
|
self.pause(element).map_err(|_| gst::StateChangeError)?;
|
|
}
|
|
gst::StateChange::ReadyToNull => {
|
|
self.unprepare(element);
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
let mut success = self.parent_change_state(element, transition)?;
|
|
|
|
match transition {
|
|
gst::StateChange::ReadyToPaused => {
|
|
success = gst::StateChangeSuccess::NoPreroll;
|
|
}
|
|
gst::StateChange::PausedToPlaying => {
|
|
self.start(element).map_err(|_| gst::StateChangeError)?;
|
|
}
|
|
gst::StateChange::PlayingToPaused => {
|
|
success = gst::StateChangeSuccess::NoPreroll;
|
|
}
|
|
gst::StateChange::PausedToReady => {
|
|
self.stop(element).map_err(|_| gst::StateChangeError)?;
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
Ok(success)
|
|
}
|
|
}
|