Mirrors/servo
1
0
Fork 0
mirror of https://github.com/servo/servo.git synced 2025-08-04 05:00:08 +01:00
Code Issues Projects Releases Packages Wiki Activity

Auto merge of #22522 - ferjm:av.playback.improvements, r=Manishearth

Browse source 
HTMLMediaElement backoff protocol and other improvements to a/v playback

- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors

This PR implements a backoff protocol to keep us from dropping frames whenever it's possible. It also add some other improvements like:
- Clean up the implementation a little bit by adding all fetch request related state to `HTMLMediaElementFetchContext`.
- Make sure that we ignore responses from old requests.
- Set the stream to seekable iff there's support for range requests. This will likely change when we add the media cache.
- Implements part of [step 8 of the seek spec](https://html.spec.whatwg.org/multipage/media.html#dom-media-seek) where we bail out if the stream is not seekable.

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/22522)
<!-- Reviewable:end -->
This commit is contained in:
bors-servo 2019-01-11 08:00:39 -05:00 • committed by GitHub
commit b49e7517a3
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
3 changed files with 240 additions and 100 deletions
Download patch file Download diff file Expand all files Collapse all files

10
Cargo.lock generated
View file

@ -3507,7 +3507,7 @@ dependencies = [
[[package]]
name = "servo-media"
version = "0.1.0"
source = "git+https://github.com/servo/media#35014baeb603b56b1b8b4de75919c58f7390cc30"
source = "git+https://github.com/servo/media#c8cc491c850b18393586500233cc55e29800146c"
dependencies = [
"servo-media-audio 0.1.0 (git+https://github.com/servo/media)",
"servo-media-gstreamer 0.1.0 (git+https://github.com/servo/media)",
@ -3517,7 +3517,7 @@ dependencies = [
[[package]]
name = "servo-media-audio"
version = "0.1.0"
source = "git+https://github.com/servo/media#35014baeb603b56b1b8b4de75919c58f7390cc30"
source = "git+https://github.com/servo/media#c8cc491c850b18393586500233cc55e29800146c"
dependencies = [
"boxfnonce 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
"byte-slice-cast 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@ -3534,7 +3534,7 @@ dependencies = [
[[package]]
name = "servo-media-gstreamer"
version = "0.1.0"
source = "git+https://github.com/servo/media#35014baeb603b56b1b8b4de75919c58f7390cc30"
source = "git+https://github.com/servo/media#c8cc491c850b18393586500233cc55e29800146c"
dependencies = [
"byte-slice-cast 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
"glib 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
@ -3553,7 +3553,7 @@ dependencies = [
[[package]]
name = "servo-media-player"
version = "0.1.0"
source = "git+https://github.com/servo/media#35014baeb603b56b1b8b4de75919c58f7390cc30"
source = "git+https://github.com/servo/media#c8cc491c850b18393586500233cc55e29800146c"
dependencies = [
"ipc-channel 0.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
"serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
@ -3640,7 +3640,7 @@ dependencies = [
[[package]]
name = "servo_media_derive"
version = "0.1.0"
source = "git+https://github.com/servo/media#35014baeb603b56b1b8b4de75919c58f7390cc30"
source = "git+https://github.com/servo/media#c8cc491c850b18393586500233cc55e29800146c"
dependencies = [
"proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
"quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",

6
components/script/dom/bindings/trace.rs
View file

@ -38,7 +38,7 @@ use crate::dom::bindings::str::{DOMString, USVString};
use crate::dom::bindings::utils::WindowProxyHandler;
use crate::dom::document::PendingRestyle;
use crate::dom::htmlimageelement::SourceSet;
use crate::dom::htmlmediaelement::MediaFrameRenderer;
use crate::dom::htmlmediaelement::{HTMLMediaElementFetchContext, MediaFrameRenderer};
use crate::task::TaskBox;
use app_units::Au;
use canvas_traits::canvas::{
@ -103,7 +103,6 @@ use servo_media::audio::panner_node::{DistanceModel, PanningModel};
use servo_media::audio::param::ParamType;
use servo_media::player::Player;
use servo_media::Backend;
use servo_media::Error as ServoMediaError;
use servo_url::{ImmutableOrigin, MutableOrigin, ServoUrl};
use smallvec::SmallVec;
use std::cell::{Cell, RefCell, UnsafeCell};
@ -484,11 +483,12 @@ unsafe_no_jsmanaged_fields!(AudioBuffer);
unsafe_no_jsmanaged_fields!(AudioContext<Backend>);
unsafe_no_jsmanaged_fields!(NodeId);
unsafe_no_jsmanaged_fields!(AnalysisEngine, DistanceModel, PanningModel, ParamType);
unsafe_no_jsmanaged_fields!(dyn Player<Error = ServoMediaError>);
unsafe_no_jsmanaged_fields!(dyn Player);
unsafe_no_jsmanaged_fields!(Mutex<MediaFrameRenderer>);
unsafe_no_jsmanaged_fields!(RenderApiSender);
unsafe_no_jsmanaged_fields!(ResourceFetchTiming);
unsafe_no_jsmanaged_fields!(Timespec);
unsafe_no_jsmanaged_fields!(HTMLMediaElementFetchContext);
unsafe impl<'a> JSTraceable for &'a str {
#[inline]

318
components/script/dom/htmlmediaelement.rs
View file

@ -56,8 +56,7 @@ use net_traits::{CoreResourceMsg, FetchChannels, FetchMetadata, FetchResponseLis
use net_traits::{NetworkError, ResourceFetchTiming, ResourceTimingType};
use script_layout_interface::HTMLMediaData;
use servo_media::player::frame::{Frame, FrameRenderer};
use servo_media::player::{PlaybackState, Player, PlayerEvent, StreamType};
use servo_media::Error as ServoMediaError;
use servo_media::player::{PlaybackState, Player, PlayerError, PlayerEvent, StreamType};
use servo_media::ServoMedia;
use servo_url::ServoUrl;
use std::cell::Cell;
@ -179,10 +178,9 @@ pub struct HTMLMediaElement {
#[ignore_malloc_size_of = "promises are hard"]
in_flight_play_promises_queue: DomRefCell<VecDeque<(Box<[Rc<Promise>]>, ErrorResult)>>,
#[ignore_malloc_size_of = "servo_media"]
player: Box<Player<Error = ServoMediaError>>,
player: Box<Player>,
#[ignore_malloc_size_of = "Arc"]
frame_renderer: Arc<Mutex<MediaFrameRenderer>>,
fetch_canceller: DomRefCell<FetchCanceller>,
/// https://html.spec.whatwg.org/multipage/#show-poster-flag
show_poster: Cell<bool>,
/// https://html.spec.whatwg.org/multipage/#dom-media-duration
@ -202,11 +200,11 @@ pub struct HTMLMediaElement {
played: Rc<DomRefCell<TimeRangesContainer>>,
/// https://html.spec.whatwg.org/multipage/#dom-media-texttracks
text_tracks_list: MutNullableDom<TextTrackList>,
/// Expected content length of the media asset being fetched or played.
content_length: Cell<Option<u64>>,
/// Time of last timeupdate notification.
#[ignore_malloc_size_of = "Defined in time"]
next_timeupdate_event: Cell<Timespec>,
/// Latest fetch request context.
current_fetch_context: DomRefCell<Option<HTMLMediaElementFetchContext>>,
}
/// <https://html.spec.whatwg.org/multipage/#dom-media-networkstate>
@ -253,7 +251,6 @@ impl HTMLMediaElement {
frame_renderer: Arc::new(Mutex::new(MediaFrameRenderer::new(
document.window().get_webrender_api_sender(),
))),
fetch_canceller: DomRefCell::new(Default::default()),
show_poster: Cell::new(true),
duration: Cell::new(f64::NAN),
playback_position: Cell::new(0.),
@ -263,8 +260,8 @@ impl HTMLMediaElement {
resource_url: DomRefCell::new(None),
played: Rc::new(DomRefCell::new(TimeRangesContainer::new())),
text_tracks_list: Default::default(),
content_length: Cell::new(None),
next_timeupdate_event: Cell::new(time::get_time() + Duration::milliseconds(250)),
current_fetch_context: DomRefCell::new(None),
}
}
@ -667,31 +664,33 @@ impl HTMLMediaElement {
..RequestInit::default()
};
let context = Arc::new(Mutex::new(HTMLMediaElementContext::new(
let mut current_fetch_context = self.current_fetch_context.borrow_mut();
if let Some(ref mut current_fetch_context) = *current_fetch_context {
current_fetch_context.cancel(CancelReason::Overridden);
}
let (fetch_context, cancel_receiver) = HTMLMediaElementFetchContext::new();
*current_fetch_context = Some(fetch_context);
let fetch_listener = Arc::new(Mutex::new(HTMLMediaElementFetchListener::new(
self,
self.resource_url.borrow().as_ref().unwrap().clone(),
offset.unwrap_or(0),
)));
let (action_sender, action_receiver) = ipc::channel().unwrap();
let window = window_from_node(self);
let (task_source, canceller) = window
.task_manager()
.networking_task_source_with_canceller();
let listener = NetworkListener {
context,
let network_listener = NetworkListener {
context: fetch_listener,
task_source,
canceller: Some(canceller),
};
ROUTER.add_route(
action_receiver.to_opaque(),
Box::new(move |message| {
listener.notify_fetch(message.to().unwrap());
network_listener.notify_fetch(message.to().unwrap());
}),
);
// This method may be called the first time we try to fetch the media
// resource or after a seek is requested. In the latter case, we need to
// cancel any previous on-going request. initialize() takes care of
// cancelling previous fetches if any exist.
let cancel_receiver = self.fetch_canceller.borrow_mut().initialize();
let global = self.global();
global
.core_resource_thread()
@ -710,13 +709,6 @@ impl HTMLMediaElement {
return;
}
// XXX(ferjm) Since we only support Blob for now it is fine to always set
// the stream type to StreamType::Seekable. Once we support MediaStream,
// this should be changed to also consider StreamType::Stream.
if let Err(e) = self.player.set_stream_type(StreamType::Seekable) {
eprintln!("Could not set stream type to Seekable. {:?}", e);
}
// Steps 1-2.
// Unapplicable, the `resource` variable already conveys which mode
// is in use.
@ -891,7 +883,9 @@ impl HTMLMediaElement {
task_source.queue_simple_event(self.upcast(), atom!("emptied"), &window);
// Step 6.2.
self.fetch_canceller.borrow_mut().cancel();
if let Some(ref mut current_fetch_context) = *self.current_fetch_context.borrow_mut() {
current_fetch_context.cancel(CancelReason::Error);
}
// Step 6.3.
// FIXME(nox): Detach MediaSource media provider object.
@ -1023,10 +1017,8 @@ impl HTMLMediaElement {
}
// Step 3.
if self.seeking.get() {
// This will cancel only the sync part of the seek algorithm.
self.generation_id.set(self.generation_id.get() + 1);
}
// The fetch request associated with this seek already takes
// care of cancelling any previous requests.
// Step 4.
// The flag will be cleared when the media engine tells us the seek was done.
@ -1046,6 +1038,12 @@ impl HTMLMediaElement {
// XXX(ferjm) seekable attribute: we need to get the information about
// what's been decoded and buffered so far from servo-media
// and add the seekable attribute as a TimeRange.
if let Some(ref current_fetch_context) = *self.current_fetch_context.borrow() {
if !current_fetch_context.is_seekable() {
self.seeking.set(false);
return;
}
}
// Step 9.
// servo-media with gstreamer does not support inaccurate seeking for now.
@ -1082,12 +1080,12 @@ impl HTMLMediaElement {
task_source.queue_simple_event(self.upcast(), atom!("seeked"), &window);
}
fn setup_media_player(&self) -> Result<(), ServoMediaError> {
fn setup_media_player(&self) -> Result<(), PlayerError> {
let (action_sender, action_receiver) = ipc::channel().unwrap();
self.player.register_event_handler(action_sender)?;
self.player.register_event_handler(action_sender);
self.player
.register_frame_renderer(self.frame_renderer.clone())?;
.register_frame_renderer(self.frame_renderer.clone());
let trusted_node = Trusted::new(self);
let window = window_from_node(self);
@ -1115,6 +1113,24 @@ impl HTMLMediaElement {
fn handle_player_event(&self, event: &PlayerEvent) {
match *event {
PlayerEvent::EndOfStream => {
// https://html.spec.whatwg.org/multipage/#media-data-processing-steps-list
// => "If the media data can be fetched but is found by inspection to be in
// an unsupported format, or can otherwise not be rendered at all"
if self.ready_state.get() < ReadyState::HaveMetadata {
self.queue_dedicated_media_source_failure_steps();
}
},
PlayerEvent::Error => {
self.error.set(Some(&*MediaError::new(
&*window_from_node(self),
MEDIA_ERR_DECODE,
)));
self.upcast::<EventTarget>().fire_event(atom!("error"));
},
PlayerEvent::FrameUpdated => {
self.upcast::<Node>().dirty(NodeDamage::OtherNodeDamage);
},
PlayerEvent::MetadataUpdated(ref metadata) => {
// https://html.spec.whatwg.org/multipage/#media-data-processing-steps-list
// => "Once enough of the media data has been fetched to determine the duration..."
@ -1179,6 +1195,39 @@ impl HTMLMediaElement {
// XXX Steps 12 and 13 require audio and video tracks support.
},
PlayerEvent::NeedData => {
// The player needs more data.
// If we already have a valid fetch request, we do nothing.
// Otherwise, if we have no request and the previous request was
// cancelled because we got an EnoughData event, we restart
// fetching where we left.
if let Some(ref current_fetch_context) = *self.current_fetch_context.borrow() {
match current_fetch_context.cancel_reason() {
Some(ref reason) if *reason == CancelReason::Backoff => {
// XXX(ferjm) Ideally we should just create a fetch request from
// where we left. But keeping track of the exact next byte that the
// media backend expects is not the easiest task, so I'm simply
// seeking to the current playback position for now which will create
// a new fetch request for the last rendered frame.
self.seek(self.playback_position.get(), false)
},
_ => (),
}
}
},
PlayerEvent::EnoughData => {
// The player has enough data and it is asking us to stop pushing
// bytes, so we cancel the ongoing fetch request iff we are able
// to restart it from where we left. Otherwise, we continue the
// current fetch request, assuming that some frames will be dropped.
if let Some(ref mut current_fetch_context) =
*self.current_fetch_context.borrow_mut()
{
if current_fetch_context.is_seekable() {
current_fetch_context.cancel(CancelReason::Backoff);
}
}
},
PlayerEvent::PositionChanged(position) => {
let position = position as f64;
let _ = self
@ -1188,25 +1237,6 @@ impl HTMLMediaElement {
self.playback_position.set(position);
self.time_marches_on();
},
PlayerEvent::StateChanged(ref state) => match *state {
PlaybackState::Paused => {
if self.ready_state.get() == ReadyState::HaveMetadata {
self.change_ready_state(ReadyState::HaveEnoughData);
}
},
_ => {},
},
PlayerEvent::EndOfStream => {
// https://html.spec.whatwg.org/multipage/#media-data-processing-steps-list
// => "If the media data can be fetched but is found by inspection to be in
// an unsupported format, or can otherwise not be rendered at all"
if self.ready_state.get() < ReadyState::HaveMetadata {
self.queue_dedicated_media_source_failure_steps();
}
},
PlayerEvent::FrameUpdated => {
self.upcast::<Node>().dirty(NodeDamage::OtherNodeDamage);
},
PlayerEvent::SeekData(p) => {
self.fetch_request(Some(p));
},
@ -1221,12 +1251,13 @@ impl HTMLMediaElement {
};
ScriptThread::await_stable_state(Microtask::MediaElement(task));
},
PlayerEvent::Error => {
self.error.set(Some(&*MediaError::new(
&*window_from_node(self),
MEDIA_ERR_DECODE,
)));
self.upcast::<EventTarget>().fire_event(atom!("error"));
PlayerEvent::StateChanged(ref state) => match *state {
PlaybackState::Paused => {
if self.ready_state.get() == ReadyState::HaveMetadata {
self.change_ready_state(ReadyState::HaveEnoughData);
}
},
_ => {},
},
}
}
@ -1646,7 +1677,64 @@ enum Resource {
Url(ServoUrl),
}
struct HTMLMediaElementContext {
/// Indicates the reason why a fetch request was cancelled.
#[derive(Debug, MallocSizeOf, PartialEq)]
enum CancelReason {
/// We were asked to stop pushing data to the player.
Backoff,
/// An error ocurred while fetching the media data.
Error,
/// A new request overrode this one.
Overridden,
}
#[derive(MallocSizeOf)]
pub struct HTMLMediaElementFetchContext {
/// Some if the request has been cancelled.
cancel_reason: Option<CancelReason>,
/// Indicates whether the fetched stream is seekable.
is_seekable: bool,
/// Fetch canceller. Allows cancelling the current fetch request by
/// manually calling its .cancel() method or automatically on Drop.
fetch_canceller: FetchCanceller,
}
impl HTMLMediaElementFetchContext {
fn new() -> (HTMLMediaElementFetchContext, ipc::IpcReceiver<()>) {
let mut fetch_canceller = FetchCanceller::new();
let cancel_receiver = fetch_canceller.initialize();
(
HTMLMediaElementFetchContext {
cancel_reason: None,
is_seekable: false,
fetch_canceller,
},
cancel_receiver,
)
}
fn is_seekable(&self) -> bool {
self.is_seekable
}
fn set_seekable(&mut self, seekable: bool) {
self.is_seekable = seekable;
}
fn cancel(&mut self, reason: CancelReason) {
if self.cancel_reason.is_some() {
return;
}
self.cancel_reason = Some(reason);
self.fetch_canceller.cancel();
}
fn cancel_reason(&self) -> &Option<CancelReason> {
&self.cancel_reason
}
}
struct HTMLMediaElementFetchListener {
/// The element that initiated the request.
elem: Trusted<HTMLMediaElement>,
/// The response metadata received to date.
@ -1655,18 +1743,22 @@ struct HTMLMediaElementContext {
generation_id: u32,
/// Time of last progress notification.
next_progress_event: Timespec,
/// True if this response is invalid and should be ignored.
ignore_response: bool,
/// timing data for this resource
/// Timing data for this resource.
resource_timing: ResourceFetchTiming,
/// url for the resource
/// Url for the resource.
url: ServoUrl,
/// Amount of data fetched.
bytes_fetched: usize,
/// Expected content length of the media asset being fetched or played.
expected_content_length: Option<u64>,
/// Number of the last byte fetched from the network for the ongoing
/// request. It is only reset to 0 if we reach EOS. Seek requests
/// set it to the requested position. Requests triggered after an
/// EnoughData event uses this value to restart the download from
/// the last fetched position.
latest_fetched_content: u64,
}
// https://html.spec.whatwg.org/multipage/#media-data-processing-steps-list
impl FetchResponseListener for HTMLMediaElementContext {
impl FetchResponseListener for HTMLMediaElementFetchListener {
fn process_request_body(&mut self) {}
fn process_request_eof(&mut self) {}
@ -1674,6 +1766,11 @@ impl FetchResponseListener for HTMLMediaElementContext {
fn process_response(&mut self, metadata: Result<FetchMetadata, NetworkError>) {
let elem = self.elem.root();
if elem.generation_id.get() != self.generation_id {
// A new fetch request was triggered, so we ignore this response.
return;
}
self.metadata = metadata.ok().map(|m| match m {
FetchMetadata::Unfiltered(m) => m,
FetchMetadata::Filtered { unsafe_, .. } => unsafe_,
@ -1693,49 +1790,85 @@ impl FetchResponseListener for HTMLMediaElementContext {
};
// We only set the expected input size if it changes.
if content_length != elem.content_length.get() {
if content_length != self.expected_content_length {
if let Some(content_length) = content_length {
if let Err(e) = self.elem.root().player.set_input_size(content_length) {
if let Err(e) = elem.player.set_input_size(content_length) {
warn!("Could not set player input size {:?}", e);
} else {
elem.content_length.set(Some(content_length));
self.expected_content_length = Some(content_length);
}
}
}
}
}
let status_is_ok = self
let (status_is_ok, is_seekable) = self
.metadata
.as_ref()
.and_then(|m| m.status.as_ref())
.map_or(true, |s| s.0 >= 200 && s.0 < 300);
.map_or((true, false), |s| {
(s.0 >= 200 && s.0 < 300, s.0 == 206 || s.0 == 416)
});
if is_seekable {
// The server supports range requests,
if let Some(ref mut current_fetch_context) = *elem.current_fetch_context.borrow_mut() {
current_fetch_context.set_seekable(true);
}
// and we can safely set the type of stream to Seekable.
if let Err(e) = elem.player.set_stream_type(StreamType::Seekable) {
warn!("Could not set stream type to Seekable. {:?}", e);
}
}
// => "If the media data cannot be fetched at all..."
if !status_is_ok {
// Ensure that the element doesn't receive any further notifications
// of the aborted fetch.
self.ignore_response = true;
elem.fetch_canceller.borrow_mut().cancel();
if let Some(ref mut current_fetch_context) = *elem.current_fetch_context.borrow_mut() {
current_fetch_context.cancel(CancelReason::Error);
}
elem.queue_dedicated_media_source_failure_steps();
}
}
fn process_response_chunk(&mut self, payload: Vec<u8>) {
if self.ignore_response {
// An error was received previously, skip processing the payload.
let elem = self.elem.root();
// If an error was received previously or if we triggered a new fetch request,
// we skip processing the payload.
if elem.generation_id.get() != self.generation_id {
return;
}
if let Some(ref current_fetch_context) = *elem.current_fetch_context.borrow() {
if current_fetch_context.cancel_reason().is_some() {
return;
}
}
self.bytes_fetched += payload.len();
let payload_len = payload.len() as u64;
let elem = self.elem.root();
// Push input data into the player.
if let Err(e) = elem.player.push_data(payload) {
eprintln!("Could not push input data to player {:?}", e);
// If we are pushing too much data and we know that we can
// restart the download later from where we left, we cancel
// the current request. Otherwise, we continue the request
// assuming that we may drop some frames.
match e {
PlayerError::EnoughData => {
if let Some(ref mut current_fetch_context) =
*elem.current_fetch_context.borrow_mut()
{
current_fetch_context.cancel(CancelReason::Backoff);
}
},
_ => (),
}
warn!("Could not push input data to player {:?}", e);
return;
}
self.latest_fetched_content += payload_len;
// https://html.spec.whatwg.org/multipage/#concept-media-load-resource step 4,
// => "If mode is remote" step 2
if time::get_time() > self.next_progress_event {
@ -1751,16 +1884,21 @@ impl FetchResponseListener for HTMLMediaElementContext {
// https://html.spec.whatwg.org/multipage/#media-data-processing-steps-list
fn process_response_eof(&mut self, status: Result<ResourceFetchTiming, NetworkError>) {
let elem = self.elem.root();
if self.ignore_response {
// An error was received previously, skip processing the payload
// and notify the media backend that we are done pushing data.
// If an error was previously received and no new fetch request was triggered,
// we skip processing the payload and notify the media backend that we are done
// pushing data.
if elem.generation_id.get() == self.generation_id {
if let Some(ref current_fetch_context) = *elem.current_fetch_context.borrow() {
if let Some(CancelReason::Error) = current_fetch_context.cancel_reason() {
if let Err(e) = elem.player.end_of_stream() {
warn!("Could not signal EOS to player {:?}", e);
}
return;
}
}
}
if status.is_ok() && self.bytes_fetched != 0 {
if status.is_ok() && self.latest_fetched_content != 0 {
if elem.ready_state.get() == ReadyState::HaveNothing {
// Make sure that we don't skip the HaveMetadata and HaveCurrentData
// states for short streams.
@ -1779,7 +1917,9 @@ impl FetchResponseListener for HTMLMediaElementContext {
// => "If the connection is interrupted after some media data has been received..."
else if elem.ready_state.get() != ReadyState::HaveNothing {
// Step 1
elem.fetch_canceller.borrow_mut().cancel();
if let Some(ref mut current_fetch_context) = *elem.current_fetch_context.borrow_mut() {
current_fetch_context.cancel(CancelReason::Error);
}
// Step 2
elem.error.set(Some(&*MediaError::new(
@ -1814,7 +1954,7 @@ impl FetchResponseListener for HTMLMediaElementContext {
}
}
impl ResourceTimingListener for HTMLMediaElementContext {
impl ResourceTimingListener for HTMLMediaElementFetchListener {
fn resource_timing_information(&self) -> (InitiatorType, ServoUrl) {
let initiator_type = InitiatorType::LocalName(
self.elem
@ -1831,24 +1971,24 @@ impl ResourceTimingListener for HTMLMediaElementContext {
}
}
impl PreInvoke for HTMLMediaElementContext {
impl PreInvoke for HTMLMediaElementFetchListener {
fn should_invoke(&self) -> bool {
//TODO: finish_load needs to run at some point if the generation changes.
self.elem.root().generation_id.get() == self.generation_id
}
}
impl HTMLMediaElementContext {
fn new(elem: &HTMLMediaElement, url: ServoUrl) -> HTMLMediaElementContext {
HTMLMediaElementContext {
impl HTMLMediaElementFetchListener {
fn new(elem: &HTMLMediaElement, url: ServoUrl, offset: u64) -> Self {
Self {
elem: Trusted::new(elem),
metadata: None,
generation_id: elem.generation_id.get(),
next_progress_event: time::get_time() + Duration::milliseconds(350),
ignore_response: false,
resource_timing: ResourceFetchTiming::new(ResourceTimingType::Resource),
url,
bytes_fetched: 0,
expected_content_length: None,
latest_fetched_content: offset,
}
}
}