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hlssink3: Allow adding EXT-X-PROGRAM-DATE-TIME tag.

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- connect to `format-location-full` it provide the first
sample of the fragment. preserve the running-time of the
first sample in fragment.
- on fragment-close message, find the mapping of running-time
to UTC time.
- on each subsequent fragment, calculate the offset of the
running-time with first fragment and add offset to base
utc time

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1145>
This commit is contained in:
rajneeshksoni 2023-04-10 22:11:39 +04:00 committed by Sebastian Dröge
parent 95a7a3c0ec
commit 4be24fdcaf
4 changed files with 161 additions and 20 deletions
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12
docs/plugins/gst_plugins_cache.json
View file

@ -2186,6 +2186,18 @@
}
},
"properties": {
"enable-program-date-time": {
"blurb": "put EXT-X-PROGRAM-DATE-TIME tag in the playlist",
"conditionally-available": false,
"construct": false,
"construct-only": false,
"controllable": false,
"default": "false",
"mutable": "null",
"readable": true,
"type": "gboolean",
"writable": true
},
"i-frames-only": {
"blurb": "Each video segments is single iframe, So put EXT-X-I-FRAMES-ONLY tag in the playlist",
"conditionally-available": false,

1
net/hlssink3/Cargo.toml
View file

@ -16,6 +16,7 @@ gio = { git = "https://github.com/gtk-rs/gtk-rs-core" }
once_cell = "1.7.2"
m3u8-rs = "5.0"
regex = "1"
chrono = "0.4"
[dev-dependencies]
gst-audio = { package = "gstreamer-audio", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs" }

135
net/hlssink3/src/imp.rs
View file

@ -8,6 +8,7 @@
use crate::playlist::{Playlist, SegmentFormatter};
use crate::HlsSink3PlaylistType;
use chrono::{DateTime, Duration, Utc};
use gio::prelude::*;
use glib::subclass::prelude::*;
use gst::glib::once_cell::sync::Lazy;
@ -26,6 +27,7 @@ const DEFAULT_TARGET_DURATION: u32 = 15;
const DEFAULT_PLAYLIST_LENGTH: u32 = 5;
const DEFAULT_PLAYLIST_TYPE: HlsSink3PlaylistType = HlsSink3PlaylistType::Unspecified;
const DEFAULT_I_FRAMES_ONLY_PLAYLIST: bool = false;
const DEFAULT_PROGRAM_DATE_TIME_TAG: bool = false;
const DEFAULT_SEND_KEYFRAME_REQUESTS: bool = true;
const SIGNAL_GET_PLAYLIST_STREAM: &str = "get-playlist-stream";
@ -68,6 +70,7 @@ struct Settings {
max_num_segment_files: usize,
target_duration: u32,
i_frames_only: bool,
enable_program_date_time: bool,
send_keyframe_requests: bool,
splitmuxsink: gst::Element,
@ -97,6 +100,7 @@ impl Default for Settings {
target_duration: DEFAULT_TARGET_DURATION,
send_keyframe_requests: DEFAULT_SEND_KEYFRAME_REQUESTS,
i_frames_only: DEFAULT_I_FRAMES_ONLY_PLAYLIST,
enable_program_date_time: DEFAULT_PROGRAM_DATE_TIME_TAG,
splitmuxsink,
giostreamsink,
@ -107,8 +111,11 @@ impl Default for Settings {
}
pub(crate) struct StartedState {
base_date_time: Option<DateTime<Utc>>,
base_running_time: Option<gst::ClockTime>,
playlist: Playlist,
fragment_opened_at: Option<gst::ClockTime>,
fragment_running_time: Option<gst::ClockTime>,
current_segment_location: Option<String>,
old_segment_locations: Vec<String>,
}
@ -120,9 +127,12 @@ impl StartedState {
i_frames_only: bool,
) -> Self {
Self {
base_date_time: None,
base_running_time: None,
playlist: Playlist::new(target_duration, playlist_type, i_frames_only),
current_segment_location: None,
fragment_opened_at: None,
fragment_running_time: None,
old_segment_locations: Vec::new(),
}
}
@ -257,6 +267,7 @@ impl HlsSink3 {
fn write_playlist(
&self,
fragment_closed_at: Option<gst::ClockTime>,
date_time: Option<DateTime<Utc>>,
) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
gst::info!(CAT, imp: self, "Preparing to write new playlist");
@ -274,6 +285,7 @@ impl HlsSink3 {
state.playlist.add_segment(
segment_filename.clone(),
state.fragment_duration_since(fragment_closed),
date_time,
);
state.old_segment_locations.push(segment_filename);
}
@ -362,7 +374,7 @@ impl HlsSink3 {
fn write_final_playlist(&self) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
gst::debug!(CAT, imp: self, "Preparing to write final playlist");
self.write_playlist(None)
self.write_playlist(None, None)
}
fn stop(&self) {
@ -416,8 +428,66 @@ impl BinImpl for HlsSink3 {
}
"splitmuxsink-fragment-closed" => {
let s = msg.structure().unwrap();
let settings = self.settings.lock().unwrap();
let mut state_guard = self.state.lock().unwrap();
let state = match &mut *state_guard {
State::Stopped => {
gst::element_error!(
self.obj(),
gst::StreamError::Failed,
("Framented closed in wrong state"),
["Fragment closed but element is in stopped state"]
);
return;
}
State::Started(state) => state,
};
if state.base_running_time.is_none() && state.fragment_running_time.is_some() {
state.base_running_time = state.fragment_running_time;
}
// Calculate the mapping from running time to UTC
if state.base_date_time.is_none() && state.fragment_running_time.is_some() {
let fragment_pts = state.fragment_running_time.unwrap();
let now_utc = Utc::now();
let now_gst = settings.giostreamsink.clock().unwrap().time().unwrap();
let pts_clock_time =
fragment_pts + settings.giostreamsink.base_time().unwrap();
let diff = now_gst.checked_sub(pts_clock_time).unwrap();
let pts_utc = now_utc
.checked_sub_signed(Duration::nanoseconds(diff.nseconds() as i64))
.unwrap();
state.base_date_time = Some(pts_utc);
}
let fragment_date_time = if settings.enable_program_date_time
&& state.base_running_time.is_some()
&& state.fragment_running_time.is_some()
{
// Add the diff of running time to UTC time
// date_time = first_segment_utc + (current_seg_running_time - first_seg_running_time)
state.base_date_time.unwrap().checked_add_signed(
Duration::nanoseconds(
state
.fragment_running_time
.opt_checked_sub(state.base_running_time)
.unwrap()
.unwrap()
.nseconds() as i64,
),
)
} else {
None
};
drop(state_guard);
drop(settings);
if let Ok(fragment_closed_at) = s.get::<gst::ClockTime>("running-time") {
let _ = self.write_playlist(Some(fragment_closed_at));
let _ =
self.write_playlist(Some(fragment_closed_at), fragment_date_time);
}
}
_ => {}
@ -469,6 +539,11 @@ impl ObjectImpl for HlsSink3 {
.blurb("Each video segments is single iframe, So put EXT-X-I-FRAMES-ONLY tag in the playlist")
.default_value(DEFAULT_I_FRAMES_ONLY_PLAYLIST)
.build(),
glib::ParamSpecBoolean::builder("enable-program-date-time")
.nick("add EXT-X-PROGRAM-DATE-TIME tag")
.blurb("put EXT-X-PROGRAM-DATE-TIME tag in the playlist")
.default_value(DEFAULT_PROGRAM_DATE_TIME_TAG)
.build(),
glib::ParamSpecBoolean::builder("send-keyframe-requests")
.nick("Send Keyframe Requests")
.blurb("Send keyframe requests to ensure correct fragmentation. If this is disabled then the input must have keyframes in regular intervals.")
@ -536,6 +611,9 @@ impl ObjectImpl for HlsSink3 {
);
}
}
"enable-program-date-time" => {
settings.enable_program_date_time = value.get().expect("type checked upstream");
}
"send-keyframe-requests" => {
settings.send_keyframe_requests = value.get().expect("type checked upstream");
settings
@ -563,6 +641,7 @@ impl ObjectImpl for HlsSink3 {
playlist_type.to_value()
}
"i-frames-only" => settings.i_frames_only.to_value(),
"enable-program-date-time" => settings.enable_program_date_time.to_value(),
"send-keyframe-requests" => settings.send_keyframe_requests.to_value(),
_ => unimplemented!(),
}
@ -660,8 +739,10 @@ impl ObjectImpl for HlsSink3 {
]);
obj.add(&settings.splitmuxsink).unwrap();
settings.splitmuxsink.connect("format-location", false, {
let state = self.state.clone();
settings
.splitmuxsink
.connect("format-location-full", false, {
let self_weak = self.downgrade();
move |args| {
let self_ = match self_weak.upgrade() {
@ -669,9 +750,40 @@ impl ObjectImpl for HlsSink3 {
None => return Some(None::<String>.to_value()),
};
let fragment_id = args[1].get::<u32>().unwrap();
gst::info!(CAT, imp: self_, "Got fragment-id: {}", fragment_id);
let mut state_guard = state.lock().unwrap();
let mut state = match &mut *state_guard {
State::Stopped => {
gst::error!(
CAT,
imp: self_,
"on format location called with Stopped state"
);
return Some("unknown_segment".to_value());
}
State::Started(s) => s,
};
let sample = args[2].get::<gst::Sample>().unwrap();
let buffer = sample.buffer();
if let Some(buffer) = buffer {
let segment = sample
.segment()
.expect("segment not available")
.downcast_ref::<gst::ClockTime>()
.expect("no time segment");
state.fragment_running_time = segment.to_running_time(buffer.pts().unwrap());
} else {
gst::warning!(
CAT,
imp: self_,
"buffer null for fragment-id: {}",
fragment_id
);
}
drop(state_guard);
match self_.on_format_location(fragment_id) {
Ok(segment_location) => Some(segment_location.to_value()),
Err(err) => {
@ -739,6 +851,19 @@ impl ElementImpl for HlsSink3 {
let ret = self.parent_change_state(transition)?;
match transition {
gst::StateChange::PlayingToPaused => {
let mut state = self.state.lock().unwrap();
match &mut *state {
State::Stopped => (),
State::Started(state) => {
// reset mapping from rt to utc. during pause
// rt is stopped but utc keep moving so need to
// calculate the mapping again
state.base_running_time = None;
state.base_date_time = None
}
}
}
gst::StateChange::PausedToReady => {
let write_final = {
let mut state = self.state.lock().unwrap();

7
net/hlssink3/src/playlist.rs
View file

@ -6,6 +6,7 @@
//
// SPDX-License-Identifier: MPL-2.0
use chrono::{DateTime, Utc};
use gst::glib::once_cell::sync::Lazy;
use m3u8_rs::{MediaPlaylist, MediaPlaylistType, MediaSegment};
use regex::Regex;
@ -68,8 +69,10 @@ impl Playlist {
}
/// Adds a new segment to the playlist.
pub fn add_segment(&mut self, uri: String, duration: f32) {
pub fn add_segment(&mut self, uri: String, duration: f32, date_time: Option<DateTime<Utc>>) {
self.start();
// TODO: We are adding date-time to each segment, hence during write all the segments have
// program-date-time header.
self.inner.segments.push(MediaSegment {
uri,
duration,
@ -78,7 +81,7 @@ impl Playlist {
discontinuity: false,
key: None,
map: None,
program_date_time: None,
program_date_time: date_time.map(|d| d.into()),
daterange: None,
unknown_tags: vec![],
});