462 lines
17 KiB
Rust
462 lines
17 KiB
Rust
// This file is part of Moonfire NVR, a security camera network video recorder.
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// Copyright (C) 2020 The Moonfire NVR Authors; see AUTHORS and LICENSE.txt.
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// SPDX-License-Identifier: GPL-v3.0-or-later WITH GPL-3.0-linking-exception.
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use crate::h264;
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use crate::stream;
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use base::clock::{Clocks, TimerGuard};
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use db::{dir, recording, writer, Camera, Database, Stream};
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use failure::{bail, format_err, Error};
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use log::{debug, info, trace, warn};
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use std::result::Result;
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::sync::Arc;
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use time;
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use url::Url;
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pub static ROTATE_INTERVAL_SEC: i64 = 60;
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/// Common state that can be used by multiple `Streamer` instances.
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pub struct Environment<'a, 'b, C, S>
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where
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C: Clocks + Clone,
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S: 'a + stream::Stream,
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{
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pub opener: &'a dyn stream::Opener<S>,
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pub db: &'b Arc<Database<C>>,
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pub shutdown: &'b Arc<AtomicBool>,
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}
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pub struct Streamer<'a, C, S>
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where
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C: Clocks + Clone,
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S: 'a + stream::Stream,
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{
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shutdown: Arc<AtomicBool>,
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// State below is only used by the thread in Run.
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rotate_offset_sec: i64,
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rotate_interval_sec: i64,
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db: Arc<Database<C>>,
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dir: Arc<dir::SampleFileDir>,
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syncer_channel: writer::SyncerChannel<::std::fs::File>,
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opener: &'a dyn stream::Opener<S>,
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stream_id: i32,
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short_name: String,
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url: Url,
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redacted_url: Url,
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detector: Option<Arc<crate::analytics::ObjectDetector>>,
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}
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impl<'a, C, S> Streamer<'a, C, S>
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where
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C: 'a + Clocks + Clone,
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S: 'a + stream::Stream,
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{
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pub fn new<'b>(
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env: &Environment<'a, 'b, C, S>,
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dir: Arc<dir::SampleFileDir>,
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syncer_channel: writer::SyncerChannel<::std::fs::File>,
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stream_id: i32,
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c: &Camera,
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s: &Stream,
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rotate_offset_sec: i64,
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rotate_interval_sec: i64,
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detector: Option<Arc<crate::analytics::ObjectDetector>>,
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) -> Result<Self, Error> {
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let mut url = Url::parse(&s.rtsp_url)?;
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let mut redacted_url = url.clone();
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if !c.username.is_empty() {
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url.set_username(&c.username)
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.map_err(|_| format_err!("can't set username"))?;
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redacted_url.set_username(&c.username).unwrap();
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url.set_password(Some(&c.password)).unwrap();
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redacted_url.set_password(Some("redacted")).unwrap();
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}
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Ok(Streamer {
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shutdown: env.shutdown.clone(),
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rotate_offset_sec,
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rotate_interval_sec,
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db: env.db.clone(),
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dir,
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syncer_channel,
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opener: env.opener,
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stream_id,
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short_name: format!("{}-{}", c.short_name, s.type_.as_str()),
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url,
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redacted_url,
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detector,
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})
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}
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pub fn short_name(&self) -> &str {
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&self.short_name
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}
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pub fn run(&mut self) {
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while !self.shutdown.load(Ordering::SeqCst) {
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if let Err(e) = self.run_once() {
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let sleep_time = time::Duration::seconds(1);
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warn!(
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"{}: sleeping for {:?} after error: {}",
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self.short_name,
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sleep_time,
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base::prettify_failure(&e)
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);
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self.db.clocks().sleep(sleep_time);
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}
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}
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info!("{}: shutting down", self.short_name);
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}
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fn run_once(&mut self) -> Result<(), Error> {
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info!("{}: Opening input: {}", self.short_name, self.redacted_url);
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let clocks = self.db.clocks();
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let mut stream = {
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let _t = TimerGuard::new(&clocks, || format!("opening {}", self.redacted_url));
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self.opener.open(stream::Source::Rtsp {
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url: self.url.as_str(),
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redacted_url: self.redacted_url.as_str(),
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})?
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};
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let realtime_offset = self.db.clocks().realtime() - clocks.monotonic();
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// TODO: verify width/height.
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let mut detector_stream = match self.detector.as_ref() {
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None => None,
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Some(od) => Some(crate::analytics::ObjectDetectorStream::new(
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stream.get_video_codecpar(),
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&od,
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)?),
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};
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let extra_data = stream.get_extra_data()?;
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let video_sample_entry_id = {
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let _t = TimerGuard::new(&clocks, || "inserting video sample entry");
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self.db.lock().insert_video_sample_entry(extra_data.entry)?
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};
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debug!(
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"{}: video_sample_entry_id={}",
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self.short_name, video_sample_entry_id
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);
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let mut seen_key_frame = false;
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// Seconds since epoch at which to next rotate.
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let mut rotate: Option<i64> = None;
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let mut transformed = Vec::new();
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let mut w = writer::Writer::new(
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&self.dir,
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&self.db,
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&self.syncer_channel,
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self.stream_id,
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video_sample_entry_id,
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);
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while !self.shutdown.load(Ordering::SeqCst) {
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let pkt = {
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let _t = TimerGuard::new(&clocks, || "getting next packet");
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stream.get_next()?
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};
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let pts = pkt.pts().ok_or_else(|| format_err!("packet with no pts"))?;
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if !seen_key_frame && !pkt.is_key() {
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continue;
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} else if !seen_key_frame {
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debug!("{}: have first key frame", self.short_name);
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seen_key_frame = true;
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}
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if let (Some(a_s), Some(a)) = (detector_stream.as_mut(), self.detector.as_ref()) {
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a_s.process_frame(&pkt, &a)?;
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}
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let frame_realtime = clocks.monotonic() + realtime_offset;
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let local_time = recording::Time::new(frame_realtime);
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rotate = if let Some(r) = rotate {
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if frame_realtime.sec > r && pkt.is_key() {
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trace!("{}: write on normal rotation", self.short_name);
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let _t = TimerGuard::new(&clocks, || "closing writer");
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w.close(Some(pts))?;
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None
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} else {
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Some(r)
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}
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} else {
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None
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};
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let r = match rotate {
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Some(r) => r,
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None => {
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let sec = frame_realtime.sec;
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let r = sec - (sec % self.rotate_interval_sec) + self.rotate_offset_sec;
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let r = r + if r <= sec {
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self.rotate_interval_sec
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} else {
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0
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};
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// On the first recording, set rotate time to not the next rotate offset, but
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// the one after, so that it's longer than usual rather than shorter than
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// usual. This ensures there's plenty of frame times to use when calculating
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// the start time.
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let r = r + if w.previously_opened()? {
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0
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} else {
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self.rotate_interval_sec
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};
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let _t = TimerGuard::new(&clocks, || "creating writer");
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r
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}
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};
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let orig_data = match pkt.data() {
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Some(d) => d,
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None => bail!("packet has no data"),
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};
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let transformed_data = if extra_data.need_transform {
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h264::transform_sample_data(orig_data, &mut transformed)?;
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transformed.as_slice()
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} else {
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orig_data
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};
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let _t = TimerGuard::new(&clocks, || {
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format!("writing {} bytes", transformed_data.len())
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});
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w.write(transformed_data, local_time, pts, pkt.is_key())?;
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rotate = Some(r);
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}
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if rotate.is_some() {
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let _t = TimerGuard::new(&clocks, || "closing writer");
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w.close(None)?;
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}
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Ok(())
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}
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}
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#[cfg(test)]
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mod tests {
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use crate::h264;
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use crate::stream::{self, Opener, Stream};
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use base::clock::{self, Clocks};
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use db::{recording, testutil, CompositeId};
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use failure::{bail, Error};
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use log::trace;
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use parking_lot::Mutex;
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use std::cmp;
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use std::convert::TryFrom;
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::sync::Arc;
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use time;
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struct ProxyingStream<'a> {
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clocks: &'a clock::SimulatedClocks,
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inner: stream::FfmpegStream,
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buffered: time::Duration,
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slept: time::Duration,
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ts_offset: i64,
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ts_offset_pkts_left: u32,
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pkts_left: u32,
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}
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impl<'a> ProxyingStream<'a> {
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fn new(
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clocks: &'a clock::SimulatedClocks,
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buffered: time::Duration,
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inner: stream::FfmpegStream,
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) -> ProxyingStream {
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clocks.sleep(buffered);
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ProxyingStream {
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clocks: clocks,
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inner: inner,
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buffered: buffered,
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slept: time::Duration::seconds(0),
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ts_offset: 0,
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ts_offset_pkts_left: 0,
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pkts_left: 0,
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}
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}
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}
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impl<'a> Stream for ProxyingStream<'a> {
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fn get_next(&mut self) -> Result<ffmpeg::avcodec::Packet, ffmpeg::Error> {
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if self.pkts_left == 0 {
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return Err(ffmpeg::Error::eof());
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}
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self.pkts_left -= 1;
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let mut pkt = self.inner.get_next()?;
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// Emulate the behavior of real cameras that send some pre-buffered frames immediately
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// on connect. After that, advance clock to the end of this frame.
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// Avoid accumulating conversion error by tracking the total amount to sleep and how
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// much we've already slept, rather than considering each frame in isolation.
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{
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let goal = pkt.pts().unwrap() + pkt.duration() as i64;
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let goal = time::Duration::nanoseconds(
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goal * 1_000_000_000 / recording::TIME_UNITS_PER_SEC,
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);
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let duration = goal - self.slept;
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let buf_part = cmp::min(self.buffered, duration);
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self.buffered = self.buffered - buf_part;
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self.clocks.sleep(duration - buf_part);
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self.slept = goal;
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}
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if self.ts_offset_pkts_left > 0 {
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self.ts_offset_pkts_left -= 1;
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let old_pts = pkt.pts().unwrap();
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let old_dts = pkt.dts();
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pkt.set_pts(Some(old_pts + self.ts_offset));
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pkt.set_dts(old_dts + self.ts_offset);
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// In a real rtsp stream, the duration of a packet is not known until the
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// next packet. ffmpeg's duration is an unreliable estimate. Set it to something
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// ridiculous.
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pkt.set_duration(i32::try_from(3600 * recording::TIME_UNITS_PER_SEC).unwrap());
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}
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Ok(pkt)
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}
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fn get_video_codecpar(&self) -> ffmpeg::avcodec::InputCodecParameters<'_> {
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self.inner.get_video_codecpar()
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}
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fn get_extra_data(&self) -> Result<h264::ExtraData, Error> {
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self.inner.get_extra_data()
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}
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}
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struct MockOpener<'a> {
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expected_url: String,
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streams: Mutex<Vec<ProxyingStream<'a>>>,
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shutdown: Arc<AtomicBool>,
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}
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impl<'a> stream::Opener<ProxyingStream<'a>> for MockOpener<'a> {
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fn open(&self, src: stream::Source) -> Result<ProxyingStream<'a>, Error> {
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match src {
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stream::Source::Rtsp { url, .. } => assert_eq!(url, &self.expected_url),
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stream::Source::File(_) => panic!("expected rtsp url"),
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};
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let mut l = self.streams.lock();
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match l.pop() {
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Some(stream) => {
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trace!("MockOpener returning next stream");
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Ok(stream)
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}
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None => {
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trace!("MockOpener shutting down");
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self.shutdown.store(true, Ordering::SeqCst);
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bail!("done")
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}
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}
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}
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}
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#[derive(Debug, Eq, PartialEq)]
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struct Frame {
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start_90k: i32,
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duration_90k: i32,
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is_key: bool,
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}
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fn get_frames(db: &db::LockedDatabase, id: CompositeId) -> Vec<Frame> {
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db.with_recording_playback(id, &mut |rec| {
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let mut it = recording::SampleIndexIterator::new();
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let mut frames = Vec::new();
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while it.next(&rec.video_index).unwrap() {
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frames.push(Frame {
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start_90k: it.start_90k,
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duration_90k: it.duration_90k,
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is_key: it.is_key(),
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});
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}
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Ok(frames)
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})
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.unwrap()
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}
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#[test]
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fn basic() {
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testutil::init();
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// 2015-04-25 00:00:00 UTC
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let clocks = clock::SimulatedClocks::new(time::Timespec::new(1429920000, 0));
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clocks.sleep(time::Duration::seconds(86400)); // to 2015-04-26 00:00:00 UTC
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let stream = stream::FFMPEG
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.open(stream::Source::File("src/testdata/clip.mp4"))
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.unwrap();
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let mut stream = ProxyingStream::new(&clocks, time::Duration::seconds(2), stream);
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stream.ts_offset = 123456; // starting pts of the input should be irrelevant
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stream.ts_offset_pkts_left = u32::max_value();
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stream.pkts_left = u32::max_value();
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let opener = MockOpener {
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expected_url: "rtsp://foo:bar@test-camera/main".to_owned(),
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streams: Mutex::new(vec![stream]),
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shutdown: Arc::new(AtomicBool::new(false)),
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};
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let db = testutil::TestDb::new(clocks.clone());
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let env = super::Environment {
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opener: &opener,
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db: &db.db,
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shutdown: &opener.shutdown,
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};
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let mut stream;
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{
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let l = db.db.lock();
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let camera = l.cameras_by_id().get(&testutil::TEST_CAMERA_ID).unwrap();
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let s = l.streams_by_id().get(&testutil::TEST_STREAM_ID).unwrap();
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let dir = db
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.dirs_by_stream_id
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.get(&testutil::TEST_STREAM_ID)
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.unwrap()
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.clone();
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stream = super::Streamer::new(
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&env,
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dir,
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db.syncer_channel.clone(),
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testutil::TEST_STREAM_ID,
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camera,
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s,
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0,
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3,
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None,
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)
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.unwrap();
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}
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stream.run();
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assert!(opener.streams.lock().is_empty());
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db.syncer_channel.flush();
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let db = db.db.lock();
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// Compare frame-by-frame. Note below that while the rotation is scheduled to happen near
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// 3-second boundaries (such as 2016-04-26 00:00:03), rotation happens somewhat later:
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// * the first rotation is always skipped
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// * the second rotation is deferred until a key frame.
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#[rustfmt::skip]
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assert_eq!(get_frames(&db, CompositeId::new(testutil::TEST_STREAM_ID, 0)), &[
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Frame { start_90k: 0, duration_90k: 90379, is_key: true },
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Frame { start_90k: 90379, duration_90k: 89884, is_key: false },
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Frame { start_90k: 180263, duration_90k: 89749, is_key: false },
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Frame { start_90k: 270012, duration_90k: 89981, is_key: false }, // pts_time 3.0001...
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Frame { start_90k: 359993, duration_90k: 90055, is_key: true },
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Frame { start_90k: 450048, duration_90k: 89967, is_key: false },
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Frame { start_90k: 540015, duration_90k: 90021, is_key: false }, // pts_time 6.0001...
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Frame { start_90k: 630036, duration_90k: 89958, is_key: false },
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]);
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#[rustfmt::skip]
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assert_eq!(get_frames(&db, CompositeId::new(testutil::TEST_STREAM_ID, 1)), &[
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Frame { start_90k: 0, duration_90k: 90011, is_key: true },
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Frame { start_90k: 90011, duration_90k: 0, is_key: false },
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]);
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let mut recordings = Vec::new();
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db.list_recordings_by_id(testutil::TEST_STREAM_ID, 0..2, &mut |r| {
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recordings.push(r);
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Ok(())
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})
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.unwrap();
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assert_eq!(2, recordings.len());
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assert_eq!(0, recordings[0].id.recording());
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assert_eq!(recording::Time(128700575999999), recordings[0].start);
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assert_eq!(0, recordings[0].flags);
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assert_eq!(1, recordings[1].id.recording());
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assert_eq!(recording::Time(128700576719993), recordings[1].start);
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assert_eq!(db::RecordingFlags::TrailingZero as i32, recordings[1].flags);
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}
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}
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