mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-05-03 00:48:44 +00:00
1578 lines
51 KiB
Rust
1578 lines
51 KiB
Rust
// Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.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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//
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// SPDX-License-Identifier: LGPL-2.1-or-later
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use futures::future::BoxFuture;
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use futures::future::{abortable, AbortHandle, Aborted};
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use futures::prelude::*;
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use gst::glib;
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use gst::prelude::*;
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use gst::subclass::prelude::*;
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use gst_rtp::RTPBuffer;
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use once_cell::sync::Lazy;
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use std::cmp::{max, min, Ordering};
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use std::collections::{BTreeSet, VecDeque};
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use std::mem;
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use std::sync::Arc;
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use std::sync::Mutex as StdMutex;
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use std::time::Duration;
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use crate::runtime::prelude::*;
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use crate::runtime::{self, Context, PadSink, PadSinkRef, PadSinkWeak, PadSrc, PadSrcRef, Task};
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use super::jitterbuffer::{RTPJitterBuffer, RTPJitterBufferItem, RTPPacketRateCtx};
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const DEFAULT_LATENCY: gst::ClockTime = gst::ClockTime::from_mseconds(200);
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const DEFAULT_DO_LOST: bool = false;
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const DEFAULT_MAX_DROPOUT_TIME: u32 = 60000;
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const DEFAULT_MAX_MISORDER_TIME: u32 = 2000;
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const DEFAULT_CONTEXT: &str = "";
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const DEFAULT_CONTEXT_WAIT: gst::ClockTime = gst::ClockTime::ZERO;
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#[derive(Debug, Clone)]
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struct Settings {
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latency: gst::ClockTime,
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do_lost: bool,
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max_dropout_time: u32,
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max_misorder_time: u32,
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context: String,
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context_wait: gst::ClockTime,
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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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latency: DEFAULT_LATENCY,
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do_lost: DEFAULT_DO_LOST,
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max_dropout_time: DEFAULT_MAX_DROPOUT_TIME,
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max_misorder_time: DEFAULT_MAX_MISORDER_TIME,
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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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#[derive(Eq)]
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struct GapPacket {
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buffer: gst::Buffer,
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seq: u16,
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pt: u8,
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}
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impl GapPacket {
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fn new(buffer: gst::Buffer) -> Self {
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let rtp_buffer = RTPBuffer::from_buffer_readable(&buffer).unwrap();
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let seq = rtp_buffer.seq();
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let pt = rtp_buffer.payload_type();
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drop(rtp_buffer);
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Self { buffer, seq, pt }
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}
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}
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impl Ord for GapPacket {
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fn cmp(&self, other: &Self) -> Ordering {
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0.cmp(&gst_rtp::compare_seqnum(self.seq, other.seq))
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}
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}
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impl PartialOrd for GapPacket {
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fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
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Some(self.cmp(other))
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}
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}
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impl PartialEq for GapPacket {
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fn eq(&self, other: &Self) -> bool {
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self.cmp(other) == Ordering::Equal
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}
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}
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struct SinkHandlerInner {
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packet_rate_ctx: RTPPacketRateCtx,
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ips_rtptime: Option<u32>,
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ips_pts: Option<gst::ClockTime>,
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gap_packets: BTreeSet<GapPacket>,
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last_pt: Option<u8>,
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last_in_seqnum: Option<u16>,
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last_rtptime: Option<u32>,
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}
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impl Default for SinkHandlerInner {
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fn default() -> Self {
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SinkHandlerInner {
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packet_rate_ctx: RTPPacketRateCtx::new(),
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ips_rtptime: None,
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ips_pts: None,
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gap_packets: BTreeSet::new(),
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last_pt: None,
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last_in_seqnum: None,
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last_rtptime: None,
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}
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}
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}
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#[derive(Clone, Default)]
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struct SinkHandler(Arc<StdMutex<SinkHandlerInner>>);
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impl SinkHandler {
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fn clear(&self) {
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let mut inner = self.0.lock().unwrap();
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*inner = SinkHandlerInner::default();
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}
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// For resetting if seqnum discontinuities
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fn reset(&self, inner: &mut SinkHandlerInner, jb: &JitterBuffer) -> BTreeSet<GapPacket> {
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gst::info!(CAT, imp: jb, "Resetting");
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let mut state = jb.state.lock().unwrap();
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state.jbuf.flush();
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state.jbuf.reset_skew();
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state.discont = true;
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state.last_popped_seqnum = None;
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state.last_popped_pts = None;
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inner.last_in_seqnum = None;
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inner.last_rtptime = None;
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state.earliest_pts = None;
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state.earliest_seqnum = None;
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inner.ips_rtptime = None;
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inner.ips_pts = None;
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mem::take(&mut inner.gap_packets)
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}
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fn parse_caps(
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&self,
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inner: &mut SinkHandlerInner,
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state: &mut State,
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jb: &JitterBuffer,
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caps: &gst::Caps,
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pt: u8,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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let s = caps.structure(0).ok_or(gst::FlowError::Error)?;
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gst::debug!(CAT, imp: jb, "Parsing {:?}", caps);
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let payload = s.get::<i32>("payload").map_err(|err| {
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gst::debug!(CAT, imp: jb, "Caps 'payload': {}", err);
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gst::FlowError::Error
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})?;
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if pt != 0 && payload as u8 != pt {
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gst::debug!(
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CAT,
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imp: jb,
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"Caps 'payload' ({}) doesn't match payload type ({})",
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payload,
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pt
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);
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return Err(gst::FlowError::Error);
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}
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inner.last_pt = Some(pt);
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let clock_rate = s.get::<i32>("clock-rate").map_err(|err| {
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gst::debug!(CAT, imp: jb, "Caps 'clock-rate': {}", err);
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gst::FlowError::Error
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})?;
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if clock_rate <= 0 {
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gst::debug!(CAT, imp: jb, "Caps 'clock-rate' <= 0");
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return Err(gst::FlowError::Error);
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}
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state.clock_rate = Some(clock_rate as u32);
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inner.packet_rate_ctx.reset(clock_rate);
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state.jbuf.set_clock_rate(clock_rate as u32);
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Ok(gst::FlowSuccess::Ok)
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}
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fn calculate_packet_spacing(
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&self,
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inner: &mut SinkHandlerInner,
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state: &mut State,
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rtptime: u32,
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pts: impl Into<Option<gst::ClockTime>>,
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) {
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if inner.ips_rtptime != Some(rtptime) {
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let pts = pts.into();
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let new_packet_spacing = pts.opt_checked_sub(inner.ips_pts).ok().flatten();
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if let Some(new_packet_spacing) = new_packet_spacing {
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let old_packet_spacing = state.packet_spacing;
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if old_packet_spacing > new_packet_spacing {
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state.packet_spacing = (new_packet_spacing + 3 * old_packet_spacing) / 4;
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} else if !old_packet_spacing.is_zero() {
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state.packet_spacing = (3 * new_packet_spacing + old_packet_spacing) / 4;
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} else {
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state.packet_spacing = new_packet_spacing;
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}
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gst::debug!(
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CAT,
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"new packet spacing {}, old packet spacing {} combined to {}",
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new_packet_spacing,
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old_packet_spacing,
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state.packet_spacing
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);
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}
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inner.ips_rtptime = Some(rtptime);
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inner.ips_pts = pts;
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}
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}
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fn handle_big_gap_buffer(
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&self,
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inner: &mut SinkHandlerInner,
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jb: &JitterBuffer,
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buffer: gst::Buffer,
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pt: u8,
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) -> bool {
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let gap_packets_length = inner.gap_packets.len();
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let mut reset = false;
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gst::debug!(
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CAT,
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imp: jb,
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"Handling big gap, gap packets length: {}",
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gap_packets_length
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);
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inner.gap_packets.insert(GapPacket::new(buffer));
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if gap_packets_length > 0 {
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let mut prev_gap_seq = std::u32::MAX;
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let mut all_consecutive = true;
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for gap_packet in inner.gap_packets.iter() {
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gst::log!(
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CAT,
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imp: jb,
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"Looking at gap packet with seq {}",
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gap_packet.seq,
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);
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all_consecutive = gap_packet.pt == pt;
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if prev_gap_seq == std::u32::MAX {
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prev_gap_seq = gap_packet.seq as u32;
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} else if gst_rtp::compare_seqnum(gap_packet.seq, prev_gap_seq as u16) != -1 {
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all_consecutive = false;
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} else {
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prev_gap_seq = gap_packet.seq as u32;
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}
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if !all_consecutive {
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break;
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}
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}
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gst::debug!(CAT, imp: jb, "all consecutive: {}", all_consecutive);
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if all_consecutive && gap_packets_length > 3 {
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reset = true;
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} else if !all_consecutive {
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inner.gap_packets.clear();
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}
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}
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reset
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}
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fn store(
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&self,
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inner: &mut SinkHandlerInner,
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pad: &gst::Pad,
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jb: &JitterBuffer,
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buffer: gst::Buffer,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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let mut state = jb.state.lock().unwrap();
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let (max_misorder_time, max_dropout_time) = {
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let settings = jb.settings.lock().unwrap();
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(settings.max_misorder_time, settings.max_dropout_time)
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};
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let (seq, rtptime, pt) = {
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let rtp_buffer =
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RTPBuffer::from_buffer_readable(&buffer).map_err(|_| gst::FlowError::Error)?;
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(
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rtp_buffer.seq(),
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rtp_buffer.timestamp(),
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rtp_buffer.payload_type(),
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)
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};
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let mut pts = buffer.pts();
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let mut dts = buffer.dts();
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let mut estimated_dts = false;
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gst::log!(
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CAT,
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imp: jb,
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"Storing buffer, seq: {}, rtptime: {}, pt: {}",
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seq,
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rtptime,
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pt
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);
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let element = jb.instance();
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if dts.is_none() {
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dts = pts;
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} else if pts.is_none() {
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pts = dts;
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}
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if dts.is_none() {
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dts = element.current_running_time();
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pts = dts;
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estimated_dts = state.clock_rate.is_some();
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} else {
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dts = state.segment.to_running_time(dts);
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}
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if state.clock_rate.is_none() {
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inner.ips_rtptime = Some(rtptime);
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inner.ips_pts = pts;
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}
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if inner.last_pt != Some(pt) {
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inner.last_pt = Some(pt);
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state.clock_rate = None;
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gst::debug!(CAT, obj: pad, "New payload type: {}", pt);
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if let Some(caps) = pad.current_caps() {
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/* Ignore errors at this point, as we want to emit request-pt-map */
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let _ = self.parse_caps(inner, &mut state, jb, &caps, pt);
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}
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}
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let mut state = {
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if state.clock_rate.is_none() {
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drop(state);
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let caps = element
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.emit_by_name::<Option<gst::Caps>>("request-pt-map", &[&(pt as u32)])
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.ok_or_else(|| {
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gst::error!(CAT, obj: pad, "Signal 'request-pt-map' retuned None");
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gst::FlowError::Error
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})?;
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let mut state = jb.state.lock().unwrap();
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self.parse_caps(inner, &mut state, jb, &caps, pt)?;
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state
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} else {
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state
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}
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};
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inner.packet_rate_ctx.update(seq, rtptime);
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let max_dropout = inner.packet_rate_ctx.max_dropout(max_dropout_time as i32);
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let max_misorder = inner.packet_rate_ctx.max_misorder(max_misorder_time as i32);
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pts = state
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.jbuf
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.calculate_pts(dts, estimated_dts, rtptime, element.base_time(), 0, false);
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if pts.is_none() {
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gst::debug!(
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CAT,
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imp: jb,
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"cannot calculate a valid pts for #{}, discard",
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seq
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);
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return Ok(gst::FlowSuccess::Ok);
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}
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if let Some(last_in_seqnum) = inner.last_in_seqnum {
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let gap = gst_rtp::compare_seqnum(last_in_seqnum as u16, seq);
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if gap == 1 {
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self.calculate_packet_spacing(inner, &mut state, rtptime, pts);
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} else {
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if (gap != -1 && gap < -(max_misorder as i32)) || (gap >= max_dropout as i32) {
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let reset = self.handle_big_gap_buffer(inner, jb, buffer, pt);
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if reset {
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// Handle reset in `enqueue_item` to avoid recursion
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return Err(gst::FlowError::CustomError);
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} else {
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return Ok(gst::FlowSuccess::Ok);
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}
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}
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inner.ips_pts = None;
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inner.ips_rtptime = None;
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}
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inner.gap_packets.clear();
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}
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if let Some(last_popped_seqnum) = state.last_popped_seqnum {
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let gap = gst_rtp::compare_seqnum(last_popped_seqnum, seq);
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if gap <= 0 {
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state.stats.num_late += 1;
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gst::debug!(CAT, imp: jb, "Dropping late {}", seq);
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return Ok(gst::FlowSuccess::Ok);
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}
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}
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inner.last_in_seqnum = Some(seq);
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let jb_item = if estimated_dts {
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RTPJitterBufferItem::new(buffer, gst::ClockTime::NONE, pts, Some(seq), rtptime)
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} else {
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RTPJitterBufferItem::new(buffer, dts, pts, Some(seq), rtptime)
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};
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let (success, _, _) = state.jbuf.insert(jb_item);
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if !success {
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/* duplicate */
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return Ok(gst::FlowSuccess::Ok);
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}
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if Some(rtptime) == inner.last_rtptime {
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state.equidistant -= 2;
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} else {
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state.equidistant += 1;
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}
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state.equidistant = min(max(state.equidistant, -7), 7);
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inner.last_rtptime = Some(rtptime);
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let must_update = match (state.earliest_pts, pts) {
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(None, _) => true,
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(Some(earliest_pts), Some(pts)) if pts < earliest_pts => true,
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(Some(earliest_pts), Some(pts)) if pts == earliest_pts => state
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.earliest_seqnum
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.map_or(false, |earliest_seqnum| seq > earliest_seqnum),
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_ => false,
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};
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if must_update {
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state.earliest_pts = pts;
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state.earliest_seqnum = Some(seq);
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}
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gst::log!(CAT, obj: pad, "Stored buffer");
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Ok(gst::FlowSuccess::Ok)
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}
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fn enqueue_item(
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&self,
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pad: &gst::Pad,
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jb: &JitterBuffer,
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buffer: Option<gst::Buffer>,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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let mut inner = self.0.lock().unwrap();
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let mut buffers = VecDeque::new();
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if let Some(buf) = buffer {
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buffers.push_back(buf);
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}
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// This is to avoid recursion with `store`, `reset` and `enqueue_item`
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while let Some(buf) = buffers.pop_front() {
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if let Err(err) = self.store(&mut inner, pad, jb, buf) {
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match err {
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gst::FlowError::CustomError => {
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for gap_packet in self.reset(&mut inner, jb) {
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buffers.push_back(gap_packet.buffer);
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}
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}
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other => return Err(other),
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}
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}
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}
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let mut state = jb.state.lock().unwrap();
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let (latency, context_wait) = {
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let settings = jb.settings.lock().unwrap();
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(settings.latency, settings.context_wait)
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};
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// Reschedule if needed
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let (_, next_wakeup) =
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jb.src_pad_handler
|
|
.next_wakeup(&jb.instance(), &state, latency, context_wait);
|
|
if let Some((next_wakeup, _)) = next_wakeup {
|
|
if let Some((previous_next_wakeup, ref abort_handle)) = state.wait_handle {
|
|
if previous_next_wakeup.is_none()
|
|
|| next_wakeup.map_or(false, |next| previous_next_wakeup.unwrap() > next)
|
|
{
|
|
gst::debug!(
|
|
CAT,
|
|
obj: pad,
|
|
"Rescheduling for new item {} < {}",
|
|
next_wakeup.display(),
|
|
previous_next_wakeup.display(),
|
|
);
|
|
abort_handle.abort();
|
|
state.wait_handle = None;
|
|
}
|
|
}
|
|
}
|
|
state.last_res
|
|
}
|
|
}
|
|
|
|
impl PadSinkHandler for SinkHandler {
|
|
type ElementImpl = JitterBuffer;
|
|
|
|
fn sink_chain(
|
|
self,
|
|
pad: PadSinkWeak,
|
|
elem: super::JitterBuffer,
|
|
buffer: gst::Buffer,
|
|
) -> BoxFuture<'static, Result<gst::FlowSuccess, gst::FlowError>> {
|
|
async move {
|
|
let pad = pad.upgrade().expect("PadSink no longer exists");
|
|
gst::debug!(CAT, obj: pad.gst_pad(), "Handling {:?}", buffer);
|
|
self.enqueue_item(pad.gst_pad(), elem.imp(), Some(buffer))
|
|
}
|
|
.boxed()
|
|
}
|
|
|
|
fn sink_event(&self, pad: &PadSinkRef, jb: &JitterBuffer, event: gst::Event) -> bool {
|
|
use gst::EventView;
|
|
|
|
gst::log!(CAT, obj: pad.gst_pad(), "Handling {:?}", event);
|
|
|
|
if let EventView::FlushStart(..) = event.view() {
|
|
if let Err(err) = jb.task.flush_start().await_maybe_on_context() {
|
|
gst::error!(CAT, obj: pad.gst_pad(), "FlushStart failed {:?}", err);
|
|
gst::element_imp_error!(
|
|
jb,
|
|
gst::StreamError::Failed,
|
|
("Internal data stream error"),
|
|
["FlushStart failed {:?}", err]
|
|
);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
gst::log!(CAT, obj: pad.gst_pad(), "Forwarding {:?}", event);
|
|
jb.src_pad.gst_pad().push_event(event)
|
|
}
|
|
|
|
fn sink_event_serialized(
|
|
self,
|
|
pad: PadSinkWeak,
|
|
elem: super::JitterBuffer,
|
|
event: gst::Event,
|
|
) -> BoxFuture<'static, bool> {
|
|
async move {
|
|
let pad = pad.upgrade().expect("PadSink no longer exists");
|
|
|
|
gst::log!(CAT, obj: pad.gst_pad(), "Handling {:?}", event);
|
|
|
|
let jb = elem.imp();
|
|
|
|
let mut forward = true;
|
|
use gst::EventView;
|
|
match event.view() {
|
|
EventView::Segment(e) => {
|
|
let mut state = jb.state.lock().unwrap();
|
|
state.segment = e.segment().clone().downcast::<gst::format::Time>().unwrap();
|
|
}
|
|
EventView::FlushStop(..) => {
|
|
if let Err(err) = jb.task.flush_stop().await_maybe_on_context() {
|
|
gst::error!(CAT, obj: pad.gst_pad(), "FlushStop failed {:?}", err);
|
|
gst::element_error!(
|
|
elem,
|
|
gst::StreamError::Failed,
|
|
("Internal data stream error"),
|
|
["FlushStop failed {:?}", err]
|
|
);
|
|
return false;
|
|
}
|
|
}
|
|
EventView::Eos(..) => {
|
|
let mut state = jb.state.lock().unwrap();
|
|
state.eos = true;
|
|
if let Some((_, abort_handle)) = state.wait_handle.take() {
|
|
abort_handle.abort();
|
|
}
|
|
forward = false;
|
|
}
|
|
_ => (),
|
|
};
|
|
|
|
if forward {
|
|
// FIXME: These events should really be queued up and stay in order
|
|
gst::log!(CAT, obj: pad.gst_pad(), "Forwarding serialized {:?}", event);
|
|
jb.src_pad.push_event(event).await
|
|
} else {
|
|
true
|
|
}
|
|
}
|
|
.boxed()
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Default)]
|
|
struct SrcHandler;
|
|
|
|
impl SrcHandler {
|
|
fn clear(&self) {}
|
|
|
|
fn generate_lost_events(
|
|
&self,
|
|
state: &mut State,
|
|
element: &super::JitterBuffer,
|
|
seqnum: u16,
|
|
pts: impl Into<Option<gst::ClockTime>>,
|
|
discont: &mut bool,
|
|
) -> Vec<gst::Event> {
|
|
let (latency, do_lost) = {
|
|
let jb = element.imp();
|
|
let settings = jb.settings.lock().unwrap();
|
|
(settings.latency, settings.do_lost)
|
|
};
|
|
|
|
let mut events = vec![];
|
|
|
|
let last_popped_seqnum = match state.last_popped_seqnum {
|
|
None => return events,
|
|
Some(seq) => seq,
|
|
};
|
|
|
|
gst::debug!(
|
|
CAT,
|
|
obj: element,
|
|
"Generating lost events seq: {}, last popped seq: {:?}",
|
|
seqnum,
|
|
last_popped_seqnum,
|
|
);
|
|
|
|
let mut lost_seqnum = last_popped_seqnum.wrapping_add(1);
|
|
let gap = gst_rtp::compare_seqnum(lost_seqnum, seqnum) as i64;
|
|
|
|
if gap > 0 {
|
|
let gap = gap as u64;
|
|
// FIXME reason why we can expect Some for the 2 lines below
|
|
let mut last_popped_pts = state.last_popped_pts.unwrap();
|
|
let interval = pts.into().unwrap().saturating_sub(last_popped_pts);
|
|
let spacing = interval / (gap as u64 + 1);
|
|
|
|
*discont = true;
|
|
|
|
if state.equidistant > 0 && gap > 1 && gap * spacing > latency {
|
|
let n_packets = gap - latency.nseconds() / spacing.nseconds();
|
|
|
|
if do_lost {
|
|
let s = gst::Structure::builder("GstRTPPacketLost")
|
|
.field("seqnum", lost_seqnum as u32)
|
|
.field("timestamp", last_popped_pts + spacing)
|
|
.field("duration", (n_packets * spacing).nseconds())
|
|
.field("retry", 0)
|
|
.build();
|
|
|
|
events.push(gst::event::CustomDownstream::new(s));
|
|
}
|
|
|
|
lost_seqnum = lost_seqnum.wrapping_add(n_packets as u16);
|
|
last_popped_pts += n_packets * spacing;
|
|
state.last_popped_pts = Some(last_popped_pts);
|
|
state.stats.num_lost += n_packets;
|
|
}
|
|
|
|
while lost_seqnum != seqnum {
|
|
let timestamp = last_popped_pts + spacing;
|
|
let duration = if state.equidistant > 0 {
|
|
spacing
|
|
} else {
|
|
gst::ClockTime::ZERO
|
|
};
|
|
|
|
state.last_popped_pts = Some(timestamp);
|
|
|
|
if do_lost {
|
|
let s = gst::Structure::builder("GstRTPPacketLost")
|
|
.field("seqnum", lost_seqnum as u32)
|
|
.field("timestamp", timestamp)
|
|
.field("duration", duration.nseconds())
|
|
.field("retry", 0)
|
|
.build();
|
|
|
|
events.push(gst::event::CustomDownstream::new(s));
|
|
}
|
|
|
|
state.stats.num_lost += 1;
|
|
|
|
lost_seqnum = lost_seqnum.wrapping_add(1);
|
|
}
|
|
}
|
|
|
|
events
|
|
}
|
|
|
|
async fn pop_and_push(
|
|
&self,
|
|
element: &super::JitterBuffer,
|
|
) -> Result<gst::FlowSuccess, gst::FlowError> {
|
|
let jb = element.imp();
|
|
|
|
let (lost_events, buffer, seq) = {
|
|
let mut state = jb.state.lock().unwrap();
|
|
|
|
let mut discont = false;
|
|
let (jb_item, _) = state.jbuf.pop();
|
|
|
|
let jb_item = match jb_item {
|
|
None => {
|
|
if state.eos {
|
|
return Err(gst::FlowError::Eos);
|
|
} else {
|
|
return Ok(gst::FlowSuccess::Ok);
|
|
}
|
|
}
|
|
Some(item) => item,
|
|
};
|
|
|
|
let dts = jb_item.dts();
|
|
let pts = jb_item.pts();
|
|
let seq = jb_item.seqnum();
|
|
let mut buffer = jb_item.into_buffer();
|
|
|
|
let lost_events = {
|
|
let buffer = buffer.make_mut();
|
|
|
|
buffer.set_dts(state.segment.to_running_time(dts));
|
|
buffer.set_pts(state.segment.to_running_time(pts));
|
|
|
|
if state.last_popped_pts.is_some() && buffer.pts() < state.last_popped_pts {
|
|
buffer.set_pts(state.last_popped_pts)
|
|
}
|
|
|
|
let lost_events = if let Some(seq) = seq {
|
|
self.generate_lost_events(&mut state, element, seq, pts, &mut discont)
|
|
} else {
|
|
vec![]
|
|
};
|
|
|
|
if state.discont {
|
|
discont = true;
|
|
state.discont = false;
|
|
}
|
|
|
|
if discont {
|
|
buffer.set_flags(gst::BufferFlags::DISCONT);
|
|
}
|
|
|
|
lost_events
|
|
};
|
|
|
|
state.last_popped_pts = buffer.pts();
|
|
if state.last_popped_pts.is_some() {
|
|
state.position = state.last_popped_pts;
|
|
}
|
|
state.last_popped_seqnum = seq;
|
|
|
|
state.stats.num_pushed += 1;
|
|
|
|
(lost_events, buffer, seq)
|
|
};
|
|
|
|
for event in lost_events {
|
|
gst::debug!(CAT, obj: jb.src_pad.gst_pad(), "Pushing lost event {:?}", event);
|
|
let _ = jb.src_pad.push_event(event).await;
|
|
}
|
|
|
|
gst::debug!(CAT, obj: jb.src_pad.gst_pad(), "Pushing {:?} with seq {:?}", buffer, seq);
|
|
|
|
jb.src_pad.push(buffer).await
|
|
}
|
|
|
|
fn next_wakeup(
|
|
&self,
|
|
element: &super::JitterBuffer,
|
|
state: &State,
|
|
latency: gst::ClockTime,
|
|
context_wait: gst::ClockTime,
|
|
) -> (
|
|
Option<gst::ClockTime>,
|
|
Option<(Option<gst::ClockTime>, Duration)>,
|
|
) {
|
|
let now = element.current_running_time();
|
|
|
|
gst::debug!(
|
|
CAT,
|
|
obj: element,
|
|
"Now is {}, EOS {}, earliest pts is {}, packet_spacing {} and latency {}",
|
|
now.display(),
|
|
state.eos,
|
|
state.earliest_pts.display(),
|
|
state.packet_spacing,
|
|
latency
|
|
);
|
|
|
|
if state.eos {
|
|
gst::debug!(CAT, obj: element, "EOS, not waiting");
|
|
return (now, Some((now, Duration::ZERO)));
|
|
}
|
|
|
|
if state.earliest_pts.is_none() {
|
|
return (now, None);
|
|
}
|
|
|
|
let next_wakeup = state.earliest_pts.map(|earliest_pts| {
|
|
(earliest_pts + latency)
|
|
.saturating_sub(state.packet_spacing)
|
|
.saturating_sub(context_wait / 2)
|
|
});
|
|
|
|
let delay = next_wakeup
|
|
.opt_saturating_sub(now)
|
|
.unwrap_or(gst::ClockTime::ZERO);
|
|
|
|
gst::debug!(
|
|
CAT,
|
|
obj: element,
|
|
"Next wakeup at {} with delay {}",
|
|
next_wakeup.display(),
|
|
delay
|
|
);
|
|
|
|
(now, Some((next_wakeup, delay.into())))
|
|
}
|
|
}
|
|
|
|
impl PadSrcHandler for SrcHandler {
|
|
type ElementImpl = JitterBuffer;
|
|
|
|
fn src_event(&self, pad: &PadSrcRef, jb: &JitterBuffer, event: gst::Event) -> bool {
|
|
use gst::EventView;
|
|
|
|
gst::log!(CAT, obj: pad.gst_pad(), "Handling {:?}", event);
|
|
|
|
match event.view() {
|
|
EventView::FlushStart(..) => {
|
|
if let Err(err) = jb.task.flush_start().await_maybe_on_context() {
|
|
gst::error!(CAT, obj: pad.gst_pad(), "FlushStart failed {:?}", err);
|
|
gst::element_imp_error!(
|
|
jb,
|
|
gst::StreamError::Failed,
|
|
("Internal data stream error"),
|
|
["FlushStart failed {:?}", err]
|
|
);
|
|
return false;
|
|
}
|
|
}
|
|
EventView::FlushStop(..) => {
|
|
if let Err(err) = jb.task.flush_stop().await_maybe_on_context() {
|
|
gst::error!(CAT, obj: pad.gst_pad(), "FlushStop failed {:?}", err);
|
|
gst::element_imp_error!(
|
|
jb,
|
|
gst::StreamError::Failed,
|
|
("Internal data stream error"),
|
|
["FlushStop failed {:?}", err]
|
|
);
|
|
return false;
|
|
}
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
gst::log!(CAT, obj: pad.gst_pad(), "Forwarding {:?}", event);
|
|
jb.sink_pad.gst_pad().push_event(event)
|
|
}
|
|
|
|
fn src_query(&self, pad: &PadSrcRef, jb: &JitterBuffer, query: &mut gst::QueryRef) -> bool {
|
|
use gst::QueryViewMut;
|
|
|
|
gst::log!(CAT, obj: pad.gst_pad(), "Forwarding {:?}", query);
|
|
|
|
match query.view_mut() {
|
|
QueryViewMut::Latency(q) => {
|
|
let mut peer_query = gst::query::Latency::new();
|
|
|
|
let ret = jb.sink_pad.gst_pad().peer_query(&mut peer_query);
|
|
|
|
if ret {
|
|
let settings = jb.settings.lock().unwrap();
|
|
let (_, mut min_latency, _) = peer_query.result();
|
|
min_latency += settings.latency;
|
|
let max_latency = gst::ClockTime::NONE;
|
|
|
|
q.set(true, min_latency, max_latency);
|
|
}
|
|
|
|
ret
|
|
}
|
|
QueryViewMut::Position(q) => {
|
|
if q.format() != gst::Format::Time {
|
|
jb.sink_pad.gst_pad().peer_query(query)
|
|
} else {
|
|
let state = jb.state.lock().unwrap();
|
|
let position = state.position;
|
|
q.set(position);
|
|
true
|
|
}
|
|
}
|
|
_ => jb.sink_pad.gst_pad().peer_query(query),
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Default)]
|
|
struct Stats {
|
|
num_pushed: u64,
|
|
num_lost: u64,
|
|
num_late: u64,
|
|
}
|
|
|
|
// Shared state between element, sink and source pad
|
|
struct State {
|
|
jbuf: RTPJitterBuffer,
|
|
|
|
last_res: Result<gst::FlowSuccess, gst::FlowError>,
|
|
position: Option<gst::ClockTime>,
|
|
|
|
segment: gst::FormattedSegment<gst::ClockTime>,
|
|
clock_rate: Option<u32>,
|
|
|
|
packet_spacing: gst::ClockTime,
|
|
equidistant: i32,
|
|
|
|
discont: bool,
|
|
eos: bool,
|
|
|
|
last_popped_seqnum: Option<u16>,
|
|
last_popped_pts: Option<gst::ClockTime>,
|
|
|
|
stats: Stats,
|
|
|
|
earliest_pts: Option<gst::ClockTime>,
|
|
earliest_seqnum: Option<u16>,
|
|
|
|
wait_handle: Option<(Option<gst::ClockTime>, AbortHandle)>,
|
|
}
|
|
|
|
impl Default for State {
|
|
fn default() -> State {
|
|
State {
|
|
jbuf: RTPJitterBuffer::new(),
|
|
|
|
last_res: Ok(gst::FlowSuccess::Ok),
|
|
position: None,
|
|
|
|
segment: gst::FormattedSegment::<gst::ClockTime>::new(),
|
|
clock_rate: None,
|
|
|
|
packet_spacing: gst::ClockTime::ZERO,
|
|
equidistant: 0,
|
|
|
|
discont: true,
|
|
eos: false,
|
|
|
|
last_popped_seqnum: None,
|
|
last_popped_pts: None,
|
|
|
|
stats: Stats::default(),
|
|
|
|
earliest_pts: None,
|
|
earliest_seqnum: None,
|
|
|
|
wait_handle: None,
|
|
}
|
|
}
|
|
}
|
|
|
|
struct JitterBufferTask {
|
|
element: super::JitterBuffer,
|
|
src_pad_handler: SrcHandler,
|
|
sink_pad_handler: SinkHandler,
|
|
}
|
|
|
|
impl JitterBufferTask {
|
|
fn new(
|
|
element: &super::JitterBuffer,
|
|
src_pad_handler: &SrcHandler,
|
|
sink_pad_handler: &SinkHandler,
|
|
) -> Self {
|
|
JitterBufferTask {
|
|
element: element.clone(),
|
|
src_pad_handler: src_pad_handler.clone(),
|
|
sink_pad_handler: sink_pad_handler.clone(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl TaskImpl for JitterBufferTask {
|
|
type Item = ();
|
|
|
|
fn start(&mut self) -> BoxFuture<'_, Result<(), gst::ErrorMessage>> {
|
|
async move {
|
|
gst::log!(CAT, obj: &self.element, "Starting task");
|
|
|
|
self.src_pad_handler.clear();
|
|
self.sink_pad_handler.clear();
|
|
|
|
let jb = self.element.imp();
|
|
|
|
let latency = jb.settings.lock().unwrap().latency;
|
|
let state = State::default();
|
|
|
|
state.jbuf.set_delay(latency);
|
|
*jb.state.lock().unwrap() = state;
|
|
|
|
gst::log!(CAT, obj: &self.element, "Task started");
|
|
Ok(())
|
|
}
|
|
.boxed()
|
|
}
|
|
|
|
// FIXME this function was migrated to the try_next / handle_item model
|
|
// but hasn't been touched as there are pending changes to jitterbuffer
|
|
// in https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/756.
|
|
// It should be possible to remove the loop below as try_next / handle_item
|
|
// are executed in a loop by the Task state machine.
|
|
// It should also be possible to store latency and context_wait as
|
|
// fields of JitterBufferTask so as to avoid locking the settings.
|
|
// If latency can change during processing, a command based mechanism
|
|
// could be implemented. See the command implemention for ts-udpsink as
|
|
// an example.
|
|
fn try_next(&mut self) -> BoxFuture<'_, Result<(), gst::FlowError>> {
|
|
async move {
|
|
let jb = self.element.imp();
|
|
let (latency, context_wait) = {
|
|
let settings = jb.settings.lock().unwrap();
|
|
(settings.latency, settings.context_wait)
|
|
};
|
|
|
|
loop {
|
|
let delay_fut = {
|
|
let mut state = jb.state.lock().unwrap();
|
|
let (_, next_wakeup) = self.src_pad_handler.next_wakeup(
|
|
&self.element,
|
|
&state,
|
|
latency,
|
|
context_wait,
|
|
);
|
|
|
|
let (delay_fut, abort_handle) = match next_wakeup {
|
|
Some((_, delay)) if delay.is_zero() => (None, None),
|
|
_ => {
|
|
let (delay_fut, abort_handle) = abortable(async move {
|
|
match next_wakeup {
|
|
Some((_, delay)) => {
|
|
runtime::timer::delay_for_at_least(delay).await;
|
|
}
|
|
None => {
|
|
future::pending::<()>().await;
|
|
}
|
|
};
|
|
});
|
|
|
|
let next_wakeup = next_wakeup.and_then(|w| w.0);
|
|
(Some(delay_fut), Some((next_wakeup, abort_handle)))
|
|
}
|
|
};
|
|
|
|
state.wait_handle = abort_handle;
|
|
|
|
delay_fut
|
|
};
|
|
|
|
// Got aborted, reschedule if needed
|
|
if let Some(delay_fut) = delay_fut {
|
|
gst::debug!(CAT, obj: &self.element, "Waiting");
|
|
if let Err(Aborted) = delay_fut.await {
|
|
gst::debug!(CAT, obj: &self.element, "Waiting aborted");
|
|
return Ok(());
|
|
}
|
|
}
|
|
|
|
let (head_pts, head_seq) = {
|
|
let state = jb.state.lock().unwrap();
|
|
//
|
|
// Check earliest PTS as we have just taken the lock
|
|
let (now, next_wakeup) = self.src_pad_handler.next_wakeup(
|
|
&self.element,
|
|
&state,
|
|
latency,
|
|
context_wait,
|
|
);
|
|
|
|
gst::debug!(
|
|
CAT,
|
|
obj: &self.element,
|
|
"Woke up at {}, earliest_pts {}",
|
|
now.display(),
|
|
state.earliest_pts.display()
|
|
);
|
|
|
|
if let Some((next_wakeup, _)) = next_wakeup {
|
|
if next_wakeup.opt_gt(now).unwrap_or(false) {
|
|
// Reschedule and wait a bit longer in the next iteration
|
|
return Ok(());
|
|
}
|
|
} else {
|
|
return Ok(());
|
|
}
|
|
|
|
let (head_pts, head_seq) = state.jbuf.peek();
|
|
|
|
(head_pts, head_seq)
|
|
};
|
|
|
|
let res = self.src_pad_handler.pop_and_push(&self.element).await;
|
|
|
|
{
|
|
let mut state = jb.state.lock().unwrap();
|
|
|
|
state.last_res = res;
|
|
|
|
if head_pts == state.earliest_pts && head_seq == state.earliest_seqnum {
|
|
let (earliest_pts, earliest_seqnum) = state.jbuf.find_earliest();
|
|
state.earliest_pts = earliest_pts;
|
|
state.earliest_seqnum = earliest_seqnum;
|
|
}
|
|
|
|
if res.is_ok() {
|
|
// Return and reschedule if the next packet would be in the future
|
|
// Check earliest PTS as we have just taken the lock
|
|
let (now, next_wakeup) = self.src_pad_handler.next_wakeup(
|
|
&self.element,
|
|
&state,
|
|
latency,
|
|
context_wait,
|
|
);
|
|
if let Some((Some(next_wakeup), _)) = next_wakeup {
|
|
if now.map_or(false, |now| next_wakeup > now) {
|
|
// Reschedule and wait a bit longer in the next iteration
|
|
return Ok(());
|
|
}
|
|
} else {
|
|
return Ok(());
|
|
}
|
|
}
|
|
}
|
|
|
|
if let Err(err) = res {
|
|
match err {
|
|
gst::FlowError::Eos => {
|
|
gst::debug!(CAT, obj: &self.element, "Pushing EOS event");
|
|
let _ = jb.src_pad.push_event(gst::event::Eos::new()).await;
|
|
}
|
|
gst::FlowError::Flushing => {
|
|
gst::debug!(CAT, obj: &self.element, "Flushing")
|
|
}
|
|
err => gst::error!(CAT, obj: &self.element, "Error {}", err),
|
|
}
|
|
|
|
return Err(err);
|
|
}
|
|
}
|
|
}
|
|
.boxed()
|
|
}
|
|
|
|
fn handle_item(&mut self, _item: ()) -> BoxFuture<'_, Result<(), gst::FlowError>> {
|
|
future::ok(()).boxed()
|
|
}
|
|
|
|
fn stop(&mut self) -> BoxFuture<'_, Result<(), gst::ErrorMessage>> {
|
|
async move {
|
|
gst::log!(CAT, obj: &self.element, "Stopping task");
|
|
|
|
let jb = self.element.imp();
|
|
let mut jb_state = jb.state.lock().unwrap();
|
|
|
|
if let Some((_, abort_handle)) = jb_state.wait_handle.take() {
|
|
abort_handle.abort();
|
|
}
|
|
|
|
self.src_pad_handler.clear();
|
|
self.sink_pad_handler.clear();
|
|
|
|
*jb_state = State::default();
|
|
|
|
gst::log!(CAT, obj: &self.element, "Task stopped");
|
|
Ok(())
|
|
}
|
|
.boxed()
|
|
}
|
|
}
|
|
|
|
pub struct JitterBuffer {
|
|
sink_pad: PadSink,
|
|
src_pad: PadSrc,
|
|
sink_pad_handler: SinkHandler,
|
|
src_pad_handler: SrcHandler,
|
|
task: Task,
|
|
state: StdMutex<State>,
|
|
settings: StdMutex<Settings>,
|
|
}
|
|
|
|
static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
|
|
gst::DebugCategory::new(
|
|
"ts-jitterbuffer",
|
|
gst::DebugColorFlags::empty(),
|
|
Some("Thread-sharing jitterbuffer"),
|
|
)
|
|
});
|
|
|
|
impl JitterBuffer {
|
|
fn clear_pt_map(&self) {
|
|
gst::debug!(CAT, imp: self, "Clearing PT map");
|
|
|
|
let mut state = self.state.lock().unwrap();
|
|
state.clock_rate = None;
|
|
state.jbuf.reset_skew();
|
|
}
|
|
|
|
fn prepare(&self) -> Result<(), gst::ErrorMessage> {
|
|
gst::debug!(CAT, imp: self, "Preparing");
|
|
|
|
let context = {
|
|
let settings = self.settings.lock().unwrap();
|
|
Context::acquire(&settings.context, settings.context_wait.into()).unwrap()
|
|
};
|
|
|
|
self.task
|
|
.prepare(
|
|
JitterBufferTask::new(
|
|
&*self.instance(),
|
|
&self.src_pad_handler,
|
|
&self.sink_pad_handler,
|
|
),
|
|
context,
|
|
)
|
|
.block_on()?;
|
|
|
|
gst::debug!(CAT, imp: self, "Prepared");
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn unprepare(&self) {
|
|
gst::debug!(CAT, imp: self, "Unpreparing");
|
|
self.task.unprepare().block_on().unwrap();
|
|
gst::debug!(CAT, imp: self, "Unprepared");
|
|
}
|
|
|
|
fn start(&self) -> Result<(), gst::ErrorMessage> {
|
|
gst::debug!(CAT, imp: self, "Starting");
|
|
self.task.start().block_on()?;
|
|
gst::debug!(CAT, imp: self, "Started");
|
|
Ok(())
|
|
}
|
|
|
|
fn stop(&self) -> Result<(), gst::ErrorMessage> {
|
|
gst::debug!(CAT, imp: self, "Stopping");
|
|
self.task.stop().block_on()?;
|
|
gst::debug!(CAT, imp: self, "Stopped");
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
#[glib::object_subclass]
|
|
impl ObjectSubclass for JitterBuffer {
|
|
const NAME: &'static str = "GstTsJitterBuffer";
|
|
type Type = super::JitterBuffer;
|
|
type ParentType = gst::Element;
|
|
|
|
fn with_class(klass: &Self::Class) -> Self {
|
|
let sink_pad_handler = SinkHandler::default();
|
|
let src_pad_handler = SrcHandler::default();
|
|
|
|
Self {
|
|
sink_pad: PadSink::new(
|
|
gst::Pad::from_template(&klass.pad_template("sink").unwrap(), Some("sink")),
|
|
sink_pad_handler.clone(),
|
|
),
|
|
src_pad: PadSrc::new(
|
|
gst::Pad::from_template(&klass.pad_template("src").unwrap(), Some("src")),
|
|
src_pad_handler.clone(),
|
|
),
|
|
sink_pad_handler,
|
|
src_pad_handler,
|
|
task: Task::default(),
|
|
state: StdMutex::new(State::default()),
|
|
settings: StdMutex::new(Settings::default()),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ObjectImpl for JitterBuffer {
|
|
fn properties() -> &'static [glib::ParamSpec] {
|
|
static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
|
|
vec![
|
|
glib::ParamSpecString::builder("context")
|
|
.nick("Context")
|
|
.blurb("Context name to share threads with")
|
|
.default_value(Some(DEFAULT_CONTEXT))
|
|
.build(),
|
|
glib::ParamSpecUInt::builder("context-wait")
|
|
.nick("Context Wait")
|
|
.blurb("Throttle poll loop to run at most once every this many ms")
|
|
.maximum(1000)
|
|
.default_value(DEFAULT_CONTEXT_WAIT.mseconds() as u32)
|
|
.build(),
|
|
glib::ParamSpecUInt::builder("latency")
|
|
.nick("Buffer latency in ms")
|
|
.blurb("Amount of ms to buffer")
|
|
.default_value(DEFAULT_LATENCY.mseconds() as u32)
|
|
.build(),
|
|
glib::ParamSpecBoolean::builder("do-lost")
|
|
.nick("Do Lost")
|
|
.blurb("Send an event downstream when a packet is lost")
|
|
.default_value(DEFAULT_DO_LOST)
|
|
.build(),
|
|
glib::ParamSpecUInt::builder("max-dropout-time")
|
|
.nick("Max dropout time")
|
|
.blurb("The maximum time (milliseconds) of missing packets tolerated.")
|
|
.default_value(DEFAULT_MAX_DROPOUT_TIME)
|
|
.build(),
|
|
glib::ParamSpecUInt::builder("max-misorder-time")
|
|
.nick("Max misorder time")
|
|
.blurb("The maximum time (milliseconds) of misordered packets tolerated.")
|
|
.default_value(DEFAULT_MAX_MISORDER_TIME)
|
|
.build(),
|
|
glib::ParamSpecBoxed::builder::<gst::Structure>("stats")
|
|
.nick("Statistics")
|
|
.blurb("Various statistics")
|
|
.read_only()
|
|
.build(),
|
|
]
|
|
});
|
|
|
|
PROPERTIES.as_ref()
|
|
}
|
|
|
|
fn signals() -> &'static [glib::subclass::Signal] {
|
|
static SIGNALS: Lazy<Vec<glib::subclass::Signal>> = Lazy::new(|| {
|
|
vec![
|
|
glib::subclass::Signal::builder("clear-pt-map")
|
|
.action()
|
|
.class_handler(|_, args| {
|
|
let element = args[0].get::<super::JitterBuffer>().expect("signal arg");
|
|
let jb = element.imp();
|
|
jb.clear_pt_map();
|
|
None
|
|
})
|
|
.build(),
|
|
glib::subclass::Signal::builder("request-pt-map")
|
|
.param_types([u32::static_type()])
|
|
.return_type::<gst::Caps>()
|
|
.build(),
|
|
]
|
|
});
|
|
|
|
SIGNALS.as_ref()
|
|
}
|
|
|
|
fn set_property(&self, _id: usize, value: &glib::Value, pspec: &glib::ParamSpec) {
|
|
match pspec.name() {
|
|
"latency" => {
|
|
let latency = {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.latency = gst::ClockTime::from_mseconds(
|
|
value.get::<u32>().expect("type checked upstream").into(),
|
|
);
|
|
settings.latency
|
|
};
|
|
|
|
let state = self.state.lock().unwrap();
|
|
state.jbuf.set_delay(latency);
|
|
|
|
let _ = self.instance().post_message(
|
|
gst::message::Latency::builder()
|
|
.src(&*self.instance())
|
|
.build(),
|
|
);
|
|
}
|
|
"do-lost" => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.do_lost = value.get().expect("type checked upstream");
|
|
}
|
|
"max-dropout-time" => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.max_dropout_time = value.get().expect("type checked upstream");
|
|
}
|
|
"max-misorder-time" => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.max_misorder_time = value.get().expect("type checked upstream");
|
|
}
|
|
"context" => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.context = value
|
|
.get::<Option<String>>()
|
|
.expect("type checked upstream")
|
|
.unwrap_or_else(|| DEFAULT_CONTEXT.into());
|
|
}
|
|
"context-wait" => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.context_wait = gst::ClockTime::from_mseconds(
|
|
value.get::<u32>().expect("type checked upstream").into(),
|
|
);
|
|
}
|
|
_ => unimplemented!(),
|
|
}
|
|
}
|
|
|
|
fn property(&self, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
|
|
match pspec.name() {
|
|
"latency" => {
|
|
let settings = self.settings.lock().unwrap();
|
|
(settings.latency.mseconds() as u32).to_value()
|
|
}
|
|
"do-lost" => {
|
|
let settings = self.settings.lock().unwrap();
|
|
settings.do_lost.to_value()
|
|
}
|
|
"max-dropout-time" => {
|
|
let settings = self.settings.lock().unwrap();
|
|
settings.max_dropout_time.to_value()
|
|
}
|
|
"max-misorder-time" => {
|
|
let settings = self.settings.lock().unwrap();
|
|
settings.max_misorder_time.to_value()
|
|
}
|
|
"stats" => {
|
|
let state = self.state.lock().unwrap();
|
|
let s = gst::Structure::builder("application/x-rtp-jitterbuffer-stats")
|
|
.field("num-pushed", state.stats.num_pushed)
|
|
.field("num-lost", state.stats.num_lost)
|
|
.field("num-late", state.stats.num_late)
|
|
.build();
|
|
s.to_value()
|
|
}
|
|
"context" => {
|
|
let settings = self.settings.lock().unwrap();
|
|
settings.context.to_value()
|
|
}
|
|
"context-wait" => {
|
|
let settings = self.settings.lock().unwrap();
|
|
(settings.context_wait.mseconds() as u32).to_value()
|
|
}
|
|
_ => unimplemented!(),
|
|
}
|
|
}
|
|
|
|
fn constructed(&self) {
|
|
self.parent_constructed();
|
|
|
|
let obj = self.instance();
|
|
obj.add_pad(self.sink_pad.gst_pad()).unwrap();
|
|
obj.add_pad(self.src_pad.gst_pad()).unwrap();
|
|
obj.set_element_flags(gst::ElementFlags::PROVIDE_CLOCK | gst::ElementFlags::REQUIRE_CLOCK);
|
|
}
|
|
}
|
|
|
|
impl GstObjectImpl for JitterBuffer {}
|
|
|
|
impl ElementImpl for JitterBuffer {
|
|
fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
|
|
static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
|
|
gst::subclass::ElementMetadata::new(
|
|
"Thread-sharing jitterbuffer",
|
|
"Generic",
|
|
"Simple jitterbuffer",
|
|
"Mathieu Duponchelle <mathieu@centricular.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 sink_pad_template = gst::PadTemplate::new(
|
|
"sink",
|
|
gst::PadDirection::Sink,
|
|
gst::PadPresence::Always,
|
|
&caps,
|
|
)
|
|
.unwrap();
|
|
|
|
let src_pad_template = gst::PadTemplate::new(
|
|
"src",
|
|
gst::PadDirection::Src,
|
|
gst::PadPresence::Always,
|
|
&caps,
|
|
)
|
|
.unwrap();
|
|
|
|
vec![sink_pad_template, src_pad_template]
|
|
});
|
|
|
|
PAD_TEMPLATES.as_ref()
|
|
}
|
|
|
|
fn change_state(
|
|
&self,
|
|
transition: gst::StateChange,
|
|
) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
|
|
gst::trace!(CAT, imp: self, "Changing state {:?}", transition);
|
|
|
|
match transition {
|
|
gst::StateChange::NullToReady => {
|
|
self.prepare().map_err(|err| {
|
|
self.post_error_message(err);
|
|
gst::StateChangeError
|
|
})?;
|
|
}
|
|
gst::StateChange::PausedToReady => {
|
|
self.stop().map_err(|_| gst::StateChangeError)?;
|
|
}
|
|
gst::StateChange::ReadyToNull => {
|
|
self.unprepare();
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
let mut success = self.parent_change_state(transition)?;
|
|
|
|
match transition {
|
|
gst::StateChange::ReadyToPaused => {
|
|
self.start().map_err(|_| gst::StateChangeError)?;
|
|
success = gst::StateChangeSuccess::NoPreroll;
|
|
}
|
|
gst::StateChange::PlayingToPaused => {
|
|
success = gst::StateChangeSuccess::NoPreroll;
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
Ok(success)
|
|
}
|
|
|
|
fn provide_clock(&self) -> Option<gst::Clock> {
|
|
Some(gst::SystemClock::obtain())
|
|
}
|
|
}
|