forked from servo/servo
-
Notifications
You must be signed in to change notification settings - Fork 0
/
htmlmediaelement.rs
2896 lines (2560 loc) · 109 KB
/
htmlmediaelement.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use std::cell::Cell;
use std::collections::VecDeque;
use std::rc::Rc;
use std::sync::{Arc, Mutex};
use std::time::{Duration, Instant};
use std::{f64, mem};
use dom_struct::dom_struct;
use embedder_traits::resources::{self, Resource as EmbedderResource};
use embedder_traits::{MediaPositionState, MediaSessionEvent, MediaSessionPlaybackState};
use euclid::default::Size2D;
use headers::{ContentLength, ContentRange, HeaderMapExt};
use html5ever::{local_name, namespace_url, ns, LocalName, Prefix};
use http::header::{self, HeaderMap, HeaderValue};
use ipc_channel::ipc;
use ipc_channel::router::ROUTER;
use js::jsapi::JSAutoRealm;
use media::{glplayer_channel, GLPlayerMsg, GLPlayerMsgForward, WindowGLContext};
use net_traits::image::base::Image;
use net_traits::request::Destination;
use net_traits::{
CoreResourceMsg, FetchChannels, FetchMetadata, FetchResponseListener, Metadata, NetworkError,
ResourceFetchTiming, ResourceTimingType,
};
use script_layout_interface::HTMLMediaData;
use script_traits::{ImageUpdate, WebrenderIpcSender};
use servo_config::pref;
use servo_media::player::audio::AudioRenderer;
use servo_media::player::video::{VideoFrame, VideoFrameRenderer};
use servo_media::player::{PlaybackState, Player, PlayerError, PlayerEvent, SeekLock, StreamType};
use servo_media::{ClientContextId, ServoMedia, SupportsMediaType};
use servo_url::ServoUrl;
use webrender_api::{
ExternalImageData, ExternalImageId, ExternalImageType, ImageBufferKind, ImageData,
ImageDescriptor, ImageDescriptorFlags, ImageFormat, ImageKey,
};
use crate::document_loader::{LoadBlocker, LoadType};
use crate::dom::attr::Attr;
use crate::dom::audiotrack::AudioTrack;
use crate::dom::audiotracklist::AudioTrackList;
use crate::dom::bindings::cell::DomRefCell;
use crate::dom::bindings::codegen::Bindings::AttrBinding::AttrMethods;
use crate::dom::bindings::codegen::Bindings::HTMLMediaElementBinding::{
CanPlayTypeResult, HTMLMediaElementConstants, HTMLMediaElementMethods,
};
use crate::dom::bindings::codegen::Bindings::HTMLSourceElementBinding::HTMLSourceElementMethods;
use crate::dom::bindings::codegen::Bindings::MediaErrorBinding::MediaErrorConstants::*;
use crate::dom::bindings::codegen::Bindings::MediaErrorBinding::MediaErrorMethods;
use crate::dom::bindings::codegen::Bindings::NavigatorBinding::Navigator_Binding::NavigatorMethods;
use crate::dom::bindings::codegen::Bindings::NodeBinding::Node_Binding::NodeMethods;
use crate::dom::bindings::codegen::Bindings::TextTrackBinding::{TextTrackKind, TextTrackMode};
use crate::dom::bindings::codegen::Bindings::WindowBinding::Window_Binding::WindowMethods;
use crate::dom::bindings::codegen::InheritTypes::{
ElementTypeId, HTMLElementTypeId, HTMLMediaElementTypeId, NodeTypeId,
};
use crate::dom::bindings::codegen::UnionTypes::{
MediaStreamOrBlob, VideoTrackOrAudioTrackOrTextTrack,
};
use crate::dom::bindings::error::{Error, ErrorResult, Fallible};
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::num::Finite;
use crate::dom::bindings::refcounted::Trusted;
use crate::dom::bindings::reflector::DomObject;
use crate::dom::bindings::root::{Dom, DomRoot, LayoutDom, MutNullableDom};
use crate::dom::bindings::str::{DOMString, USVString};
use crate::dom::blob::Blob;
use crate::dom::document::Document;
use crate::dom::element::{
cors_setting_for_element, reflect_cross_origin_attribute, set_cross_origin_attribute,
AttributeMutation, Element, ElementCreator,
};
use crate::dom::event::Event;
use crate::dom::eventtarget::EventTarget;
use crate::dom::globalscope::GlobalScope;
use crate::dom::htmlelement::HTMLElement;
use crate::dom::htmlscriptelement::HTMLScriptElement;
use crate::dom::htmlsourceelement::HTMLSourceElement;
use crate::dom::htmlstyleelement::HTMLStyleElement;
use crate::dom::htmlvideoelement::HTMLVideoElement;
use crate::dom::mediaerror::MediaError;
use crate::dom::mediafragmentparser::MediaFragmentParser;
use crate::dom::mediastream::MediaStream;
use crate::dom::node::{document_from_node, window_from_node, Node, NodeDamage, UnbindContext};
use crate::dom::performanceresourcetiming::InitiatorType;
use crate::dom::promise::Promise;
use crate::dom::shadowroot::IsUserAgentWidget;
use crate::dom::texttrack::TextTrack;
use crate::dom::texttracklist::TextTrackList;
use crate::dom::timeranges::{TimeRanges, TimeRangesContainer};
use crate::dom::trackevent::TrackEvent;
use crate::dom::url::URL;
use crate::dom::videotrack::VideoTrack;
use crate::dom::videotracklist::VideoTrackList;
use crate::dom::virtualmethods::VirtualMethods;
use crate::fetch::{create_a_potential_cors_request, FetchCanceller};
use crate::microtask::{Microtask, MicrotaskRunnable};
use crate::network_listener::{self, NetworkListener, PreInvoke, ResourceTimingListener};
use crate::realms::{enter_realm, InRealm};
use crate::script_thread::ScriptThread;
use crate::task_source::TaskSource;
#[derive(PartialEq)]
enum FrameStatus {
Locked,
Unlocked,
}
struct FrameHolder(FrameStatus, VideoFrame);
impl FrameHolder {
fn new(frame: VideoFrame) -> FrameHolder {
FrameHolder(FrameStatus::Unlocked, frame)
}
fn lock(&mut self) {
if self.0 == FrameStatus::Unlocked {
self.0 = FrameStatus::Locked;
};
}
fn unlock(&mut self) {
if self.0 == FrameStatus::Locked {
self.0 = FrameStatus::Unlocked;
};
}
fn set(&mut self, new_frame: VideoFrame) {
if self.0 == FrameStatus::Unlocked {
self.1 = new_frame
};
}
fn get(&self) -> (u32, Size2D<i32>, usize) {
if self.0 == FrameStatus::Locked {
(
self.1.get_texture_id(),
Size2D::new(self.1.get_width(), self.1.get_height()),
0,
)
} else {
unreachable!();
}
}
fn get_frame(&self) -> VideoFrame {
self.1.clone()
}
}
pub struct MediaFrameRenderer {
player_id: Option<u64>,
api: WebrenderIpcSender,
current_frame: Option<(ImageKey, i32, i32)>,
old_frame: Option<ImageKey>,
very_old_frame: Option<ImageKey>,
current_frame_holder: Option<FrameHolder>,
}
impl MediaFrameRenderer {
fn new(render_api_sender: WebrenderIpcSender) -> Self {
Self {
player_id: None,
api: render_api_sender,
current_frame: None,
old_frame: None,
very_old_frame: None,
current_frame_holder: None,
}
}
fn render_poster_frame(&mut self, image: Arc<Image>) {
if let Some(image_id) = image.id {
self.current_frame = Some((image_id, image.width as i32, image.height as i32));
}
}
}
impl VideoFrameRenderer for MediaFrameRenderer {
fn render(&mut self, frame: VideoFrame) {
let mut updates = vec![];
if let Some(old_image_key) = mem::replace(&mut self.very_old_frame, self.old_frame.take()) {
updates.push(ImageUpdate::DeleteImage(old_image_key));
}
let descriptor = ImageDescriptor::new(
frame.get_width(),
frame.get_height(),
ImageFormat::BGRA8,
ImageDescriptorFlags::empty(),
);
match self.current_frame {
Some((ref image_key, ref mut width, ref mut height))
if *width == frame.get_width() && *height == frame.get_height() =>
{
if !frame.is_gl_texture() {
updates.push(ImageUpdate::UpdateImage(
*image_key,
descriptor,
ImageData::Raw(frame.get_data()),
));
}
self.current_frame_holder
.get_or_insert_with(|| FrameHolder::new(frame.clone()))
.set(frame);
if let Some(old_image_key) = self.old_frame.take() {
updates.push(ImageUpdate::DeleteImage(old_image_key));
}
},
Some((ref mut image_key, ref mut width, ref mut height)) => {
self.old_frame = Some(*image_key);
let new_image_key = match self.api.generate_image_key() {
Ok(key) => key,
Err(()) => return,
};
/* update current_frame */
*image_key = new_image_key;
*width = frame.get_width();
*height = frame.get_height();
let image_data = if frame.is_gl_texture() && self.player_id.is_some() {
let texture_target = if frame.is_external_oes() {
ImageBufferKind::TextureExternal
} else {
ImageBufferKind::Texture2D
};
ImageData::External(ExternalImageData {
id: ExternalImageId(self.player_id.unwrap()),
channel_index: 0,
image_type: ExternalImageType::TextureHandle(texture_target),
})
} else {
ImageData::Raw(frame.get_data())
};
self.current_frame_holder
.get_or_insert_with(|| FrameHolder::new(frame.clone()))
.set(frame);
updates.push(ImageUpdate::AddImage(new_image_key, descriptor, image_data));
},
None => {
let image_key = match self.api.generate_image_key() {
Ok(key) => key,
Err(()) => return,
};
self.current_frame = Some((image_key, frame.get_width(), frame.get_height()));
let image_data = if frame.is_gl_texture() && self.player_id.is_some() {
let texture_target = if frame.is_external_oes() {
ImageBufferKind::TextureExternal
} else {
ImageBufferKind::Texture2D
};
ImageData::External(ExternalImageData {
id: ExternalImageId(self.player_id.unwrap()),
channel_index: 0,
image_type: ExternalImageType::TextureHandle(texture_target),
})
} else {
ImageData::Raw(frame.get_data())
};
self.current_frame_holder = Some(FrameHolder::new(frame));
updates.push(ImageUpdate::AddImage(image_key, descriptor, image_data));
},
}
self.api.update_images(updates);
}
}
#[crown::unrooted_must_root_lint::must_root]
#[derive(JSTraceable, MallocSizeOf)]
enum SrcObject {
MediaStream(Dom<MediaStream>),
Blob(Dom<Blob>),
}
impl From<MediaStreamOrBlob> for SrcObject {
#[allow(crown::unrooted_must_root)]
fn from(src_object: MediaStreamOrBlob) -> SrcObject {
match src_object {
MediaStreamOrBlob::Blob(blob) => SrcObject::Blob(Dom::from_ref(&*blob)),
MediaStreamOrBlob::MediaStream(stream) => {
SrcObject::MediaStream(Dom::from_ref(&*stream))
},
}
}
}
#[dom_struct]
#[allow(non_snake_case)]
pub struct HTMLMediaElement {
htmlelement: HTMLElement,
/// <https://html.spec.whatwg.org/multipage/#dom-media-networkstate>
network_state: Cell<NetworkState>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-readystate>
ready_state: Cell<ReadyState>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-srcobject>
src_object: DomRefCell<Option<SrcObject>>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-currentsrc>
current_src: DomRefCell<String>,
/// Incremented whenever tasks associated with this element are cancelled.
generation_id: Cell<u32>,
/// <https://html.spec.whatwg.org/multipage/#fire-loadeddata>
///
/// Reset to false every time the load algorithm is invoked.
fired_loadeddata_event: Cell<bool>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-error>
error: MutNullableDom<MediaError>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-paused>
paused: Cell<bool>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-defaultplaybackrate>
defaultPlaybackRate: Cell<f64>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-playbackrate>
playbackRate: Cell<f64>,
/// <https://html.spec.whatwg.org/multipage/#attr-media-autoplay>
autoplaying: Cell<bool>,
/// <https://html.spec.whatwg.org/multipage/#delaying-the-load-event-flag>
delaying_the_load_event_flag: DomRefCell<Option<LoadBlocker>>,
/// <https://html.spec.whatwg.org/multipage/#list-of-pending-play-promises>
#[ignore_malloc_size_of = "promises are hard"]
pending_play_promises: DomRefCell<Vec<Rc<Promise>>>,
/// Play promises which are soon to be fulfilled by a queued task.
#[ignore_malloc_size_of = "promises are hard"]
in_flight_play_promises_queue: DomRefCell<VecDeque<(Box<[Rc<Promise>]>, ErrorResult)>>,
#[ignore_malloc_size_of = "servo_media"]
#[no_trace]
player: DomRefCell<Option<Arc<Mutex<dyn Player>>>>,
#[ignore_malloc_size_of = "Arc"]
#[no_trace]
video_renderer: Arc<Mutex<MediaFrameRenderer>>,
#[ignore_malloc_size_of = "Arc"]
#[no_trace]
audio_renderer: DomRefCell<Option<Arc<Mutex<dyn AudioRenderer>>>>,
/// <https://html.spec.whatwg.org/multipage/#show-poster-flag>
show_poster: Cell<bool>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-duration>
duration: Cell<f64>,
/// <https://html.spec.whatwg.org/multipage/#official-playback-position>
playback_position: Cell<f64>,
/// <https://html.spec.whatwg.org/multipage/#default-playback-start-position>
default_playback_start_position: Cell<f64>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-volume>
volume: Cell<f64>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-seeking>
seeking: Cell<bool>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-muted>
muted: Cell<bool>,
/// URL of the media resource, if any.
#[no_trace]
resource_url: DomRefCell<Option<ServoUrl>>,
/// URL of the media resource, if the resource is set through the src_object attribute and it
/// is a blob.
#[no_trace]
blob_url: DomRefCell<Option<ServoUrl>>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-played>
#[ignore_malloc_size_of = "Rc"]
played: DomRefCell<TimeRangesContainer>,
// https://html.spec.whatwg.org/multipage/#dom-media-audiotracks
audio_tracks_list: MutNullableDom<AudioTrackList>,
// https://html.spec.whatwg.org/multipage/#dom-media-videotracks
video_tracks_list: MutNullableDom<VideoTrackList>,
/// <https://html.spec.whatwg.org/multipage/#dom-media-texttracks>
text_tracks_list: MutNullableDom<TextTrackList>,
/// Time of last timeupdate notification.
#[ignore_malloc_size_of = "Defined in std::time"]
next_timeupdate_event: Cell<Instant>,
/// Latest fetch request context.
current_fetch_context: DomRefCell<Option<HTMLMediaElementFetchContext>>,
/// Player Id reported the player thread
id: Cell<u64>,
/// Media controls id.
/// In order to workaround the lack of privileged JS context, we secure the
/// the access to the "privileged" document.servoGetMediaControls(id) API by
/// keeping a whitelist of media controls identifiers.
media_controls_id: DomRefCell<Option<String>>,
#[ignore_malloc_size_of = "Defined in other crates"]
#[no_trace]
player_context: WindowGLContext,
}
/// <https://html.spec.whatwg.org/multipage/#dom-media-networkstate>
#[derive(Clone, Copy, JSTraceable, MallocSizeOf, PartialEq)]
#[repr(u8)]
pub enum NetworkState {
Empty = HTMLMediaElementConstants::NETWORK_EMPTY as u8,
Idle = HTMLMediaElementConstants::NETWORK_IDLE as u8,
Loading = HTMLMediaElementConstants::NETWORK_LOADING as u8,
NoSource = HTMLMediaElementConstants::NETWORK_NO_SOURCE as u8,
}
/// <https://html.spec.whatwg.org/multipage/#dom-media-readystate>
#[derive(Clone, Copy, Debug, JSTraceable, MallocSizeOf, PartialEq, PartialOrd)]
#[repr(u8)]
pub enum ReadyState {
HaveNothing = HTMLMediaElementConstants::HAVE_NOTHING as u8,
HaveMetadata = HTMLMediaElementConstants::HAVE_METADATA as u8,
HaveCurrentData = HTMLMediaElementConstants::HAVE_CURRENT_DATA as u8,
HaveFutureData = HTMLMediaElementConstants::HAVE_FUTURE_DATA as u8,
HaveEnoughData = HTMLMediaElementConstants::HAVE_ENOUGH_DATA as u8,
}
impl HTMLMediaElement {
pub fn new_inherited(tag_name: LocalName, prefix: Option<Prefix>, document: &Document) -> Self {
Self {
htmlelement: HTMLElement::new_inherited(tag_name, prefix, document),
network_state: Cell::new(NetworkState::Empty),
ready_state: Cell::new(ReadyState::HaveNothing),
src_object: Default::default(),
current_src: DomRefCell::new("".to_owned()),
generation_id: Cell::new(0),
fired_loadeddata_event: Cell::new(false),
error: Default::default(),
paused: Cell::new(true),
defaultPlaybackRate: Cell::new(1.0),
playbackRate: Cell::new(1.0),
muted: Cell::new(false),
// FIXME(nox): Why is this initialised to true?
autoplaying: Cell::new(true),
delaying_the_load_event_flag: Default::default(),
pending_play_promises: Default::default(),
in_flight_play_promises_queue: Default::default(),
player: Default::default(),
video_renderer: Arc::new(Mutex::new(MediaFrameRenderer::new(
document.window().get_webrender_api_sender(),
))),
audio_renderer: Default::default(),
show_poster: Cell::new(true),
duration: Cell::new(f64::NAN),
playback_position: Cell::new(0.),
default_playback_start_position: Cell::new(0.),
volume: Cell::new(1.0),
seeking: Cell::new(false),
resource_url: DomRefCell::new(None),
blob_url: DomRefCell::new(None),
played: DomRefCell::new(TimeRangesContainer::new()),
audio_tracks_list: Default::default(),
video_tracks_list: Default::default(),
text_tracks_list: Default::default(),
next_timeupdate_event: Cell::new(Instant::now() + Duration::from_millis(250)),
current_fetch_context: DomRefCell::new(None),
id: Cell::new(0),
media_controls_id: DomRefCell::new(None),
player_context: document.window().get_player_context(),
}
}
pub fn get_ready_state(&self) -> ReadyState {
self.ready_state.get()
}
fn media_type_id(&self) -> HTMLMediaElementTypeId {
match self.upcast::<Node>().type_id() {
NodeTypeId::Element(ElementTypeId::HTMLElement(
HTMLElementTypeId::HTMLMediaElement(media_type_id),
)) => media_type_id,
_ => unreachable!(),
}
}
fn play_media(&self) {
if let Some(ref player) = *self.player.borrow() {
if let Err(e) = player.lock().unwrap().set_rate(self.playbackRate.get()) {
warn!("Could not set the playback rate {:?}", e);
}
if let Err(e) = player.lock().unwrap().play() {
warn!("Could not play media {:?}", e);
}
}
}
/// Marks that element as delaying the load event or not.
///
/// Nothing happens if the element was already delaying the load event and
/// we pass true to that method again.
///
/// <https://html.spec.whatwg.org/multipage/#delaying-the-load-event-flag>
pub fn delay_load_event(&self, delay: bool) {
let mut blocker = self.delaying_the_load_event_flag.borrow_mut();
if delay && blocker.is_none() {
*blocker = Some(LoadBlocker::new(&document_from_node(self), LoadType::Media));
} else if !delay && blocker.is_some() {
LoadBlocker::terminate(&mut *blocker);
}
}
/// <https://html.spec.whatwg.org/multipage/#time-marches-on>
fn time_marches_on(&self) {
// Step 6.
if Instant::now() > self.next_timeupdate_event.get() {
let window = window_from_node(self);
window
.task_manager()
.media_element_task_source()
.queue_simple_event(self.upcast(), atom!("timeupdate"), &window);
self.next_timeupdate_event
.set(Instant::now() + Duration::from_millis(350));
}
}
/// <https://html.spec.whatwg.org/multipage/#internal-pause-steps>
fn internal_pause_steps(&self) {
// Step 1.
self.autoplaying.set(false);
// Step 2.
if !self.Paused() {
// Step 2.1.
self.paused.set(true);
// Step 2.2.
self.take_pending_play_promises(Err(Error::Abort));
// Step 2.3.
let window = window_from_node(self);
let this = Trusted::new(self);
let generation_id = self.generation_id.get();
let _ = window.task_manager().media_element_task_source().queue(
task!(internal_pause_steps: move || {
let this = this.root();
if generation_id != this.generation_id.get() {
return;
}
this.fulfill_in_flight_play_promises(|| {
// Step 2.3.1.
this.upcast::<EventTarget>().fire_event(atom!("timeupdate"));
// Step 2.3.2.
this.upcast::<EventTarget>().fire_event(atom!("pause"));
if let Some(ref player) = *this.player.borrow() {
if let Err(e) = player.lock().unwrap().pause() {
eprintln!("Could not pause player {:?}", e);
}
}
// Step 2.3.3.
// Done after running this closure in
// `fulfill_in_flight_play_promises`.
});
}),
window.upcast(),
);
// Step 2.4.
// FIXME(nox): Set the official playback position to the current
// playback position.
}
}
// https://html.spec.whatwg.org/multipage/#allowed-to-play
fn is_allowed_to_play(&self) -> bool {
true
}
// https://html.spec.whatwg.org/multipage/#notify-about-playing
fn notify_about_playing(&self) {
// Step 1.
self.take_pending_play_promises(Ok(()));
// Step 2.
let window = window_from_node(self);
let this = Trusted::new(self);
let generation_id = self.generation_id.get();
// FIXME(nox): Why are errors silenced here?
let _ = window.task_manager().media_element_task_source().queue(
task!(notify_about_playing: move || {
let this = this.root();
if generation_id != this.generation_id.get() {
return;
}
this.fulfill_in_flight_play_promises(|| {
// Step 2.1.
this.upcast::<EventTarget>().fire_event(atom!("playing"));
this.play_media();
// Step 2.2.
// Done after running this closure in
// `fulfill_in_flight_play_promises`.
});
}),
window.upcast(),
);
}
// https://html.spec.whatwg.org/multipage/#ready-states
fn change_ready_state(&self, ready_state: ReadyState) {
let old_ready_state = self.ready_state.get();
self.ready_state.set(ready_state);
if self.network_state.get() == NetworkState::Empty {
return;
}
let window = window_from_node(self);
let task_source = window.task_manager().media_element_task_source();
// Step 1.
match (old_ready_state, ready_state) {
(ReadyState::HaveNothing, ReadyState::HaveMetadata) => {
task_source.queue_simple_event(self.upcast(), atom!("loadedmetadata"), &window);
// No other steps are applicable in this case.
return;
},
(ReadyState::HaveMetadata, new) if new >= ReadyState::HaveCurrentData => {
if !self.fired_loadeddata_event.get() {
self.fired_loadeddata_event.set(true);
let this = Trusted::new(self);
// FIXME(nox): Why are errors silenced here?
let _ = task_source.queue(
task!(media_reached_current_data: move || {
let this = this.root();
this.upcast::<EventTarget>().fire_event(atom!("loadeddata"));
this.delay_load_event(false);
}),
window.upcast(),
);
}
// Steps for the transition from HaveMetadata to HaveCurrentData
// or HaveFutureData also apply here, as per the next match
// expression.
},
(ReadyState::HaveFutureData, new) if new <= ReadyState::HaveCurrentData => {
// FIXME(nox): Queue a task to fire timeupdate and waiting
// events if the conditions call from the spec are met.
// No other steps are applicable in this case.
return;
},
_ => (),
}
if old_ready_state <= ReadyState::HaveCurrentData &&
ready_state >= ReadyState::HaveFutureData
{
task_source.queue_simple_event(self.upcast(), atom!("canplay"), &window);
if !self.Paused() {
self.notify_about_playing();
}
}
if ready_state == ReadyState::HaveEnoughData {
// TODO: Check sandboxed automatic features browsing context flag.
// FIXME(nox): I have no idea what this TODO is about.
// FIXME(nox): Review this block.
if self.autoplaying.get() && self.Paused() && self.Autoplay() {
// Step 1
self.paused.set(false);
// Step 2
if self.show_poster.get() {
self.show_poster.set(false);
self.time_marches_on();
}
// Step 3
task_source.queue_simple_event(self.upcast(), atom!("play"), &window);
// Step 4
self.notify_about_playing();
// Step 5
self.autoplaying.set(false);
}
// FIXME(nox): According to the spec, this should come *before* the
// "play" event.
task_source.queue_simple_event(self.upcast(), atom!("canplaythrough"), &window);
}
}
// https://html.spec.whatwg.org/multipage/#concept-media-load-algorithm
fn invoke_resource_selection_algorithm(&self) {
// Step 1.
self.network_state.set(NetworkState::NoSource);
// Step 2.
self.show_poster.set(true);
// Step 3.
self.delay_load_event(true);
// Step 4.
// If the resource selection mode in the synchronous section is
// "attribute", the URL of the resource to fetch is relative to the
// media element's node document when the src attribute was last
// changed, which is why we need to pass the base URL in the task
// right here.
let doc = document_from_node(self);
let task = MediaElementMicrotask::ResourceSelectionTask {
elem: DomRoot::from_ref(self),
generation_id: self.generation_id.get(),
base_url: doc.base_url(),
};
// FIXME(nox): This will later call the resource_selection_algorithm_sync
// method from below, if microtasks were trait objects, we would be able
// to put the code directly in this method, without the boilerplate
// indirections.
ScriptThread::await_stable_state(Microtask::MediaElement(task));
}
// https://html.spec.whatwg.org/multipage/#concept-media-load-algorithm
fn resource_selection_algorithm_sync(&self, base_url: ServoUrl) {
// Step 5.
// FIXME(ferjm): Implement blocked_on_parser logic
// https://html.spec.whatwg.org/multipage/#blocked-on-parser
// FIXME(nox): Maybe populate the list of pending text tracks.
// Step 6.
enum Mode {
Object,
Attribute(String),
Children(DomRoot<HTMLSourceElement>),
}
fn mode(media: &HTMLMediaElement) -> Option<Mode> {
if media.src_object.borrow().is_some() {
return Some(Mode::Object);
}
if let Some(attr) = media
.upcast::<Element>()
.get_attribute(&ns!(), &local_name!("src"))
{
return Some(Mode::Attribute(attr.Value().into()));
}
let source_child_element = media
.upcast::<Node>()
.children()
.filter_map(DomRoot::downcast::<HTMLSourceElement>)
.next();
if let Some(element) = source_child_element {
return Some(Mode::Children(element));
}
None
}
let mode = if let Some(mode) = mode(self) {
mode
} else {
self.network_state.set(NetworkState::Empty);
// https://github.com/whatwg/html/issues/3065
self.delay_load_event(false);
return;
};
// Step 7.
self.network_state.set(NetworkState::Loading);
// Step 8.
let window = window_from_node(self);
window
.task_manager()
.media_element_task_source()
.queue_simple_event(self.upcast(), atom!("loadstart"), &window);
// Step 9.
match mode {
// Step 9.obj.
Mode::Object => {
// Step 9.obj.1.
*self.current_src.borrow_mut() = "".to_owned();
// Step 9.obj.2.
// FIXME(nox): The rest of the steps should be ran in parallel.
// Step 9.obj.3.
// Note that the resource fetch algorithm itself takes care
// of the cleanup in case of failure itself.
self.resource_fetch_algorithm(Resource::Object);
},
Mode::Attribute(src) => {
// Step 9.attr.1.
if src.is_empty() {
self.queue_dedicated_media_source_failure_steps();
return;
}
// Step 9.attr.2.
let url_record = match base_url.join(&src) {
Ok(url) => url,
Err(_) => {
self.queue_dedicated_media_source_failure_steps();
return;
},
};
// Step 9.attr.3.
*self.current_src.borrow_mut() = url_record.as_str().into();
// Step 9.attr.4.
// Note that the resource fetch algorithm itself takes care
// of the cleanup in case of failure itself.
self.resource_fetch_algorithm(Resource::Url(url_record));
},
// Step 9.children.
Mode::Children(source) => {
// This is only a partial implementation
// FIXME: https://github.com/servo/servo/issues/21481
let src = source.Src();
// Step 9.attr.2.
if src.is_empty() {
source.upcast::<EventTarget>().fire_event(atom!("error"));
self.queue_dedicated_media_source_failure_steps();
return;
}
// Step 9.attr.3.
let url_record = match base_url.join(&src) {
Ok(url) => url,
Err(_) => {
source.upcast::<EventTarget>().fire_event(atom!("error"));
self.queue_dedicated_media_source_failure_steps();
return;
},
};
// Step 9.attr.8.
self.resource_fetch_algorithm(Resource::Url(url_record));
},
}
}
fn fetch_request(&self, offset: Option<u64>, seek_lock: Option<SeekLock>) {
if self.resource_url.borrow().is_none() && self.blob_url.borrow().is_none() {
eprintln!("Missing request url");
self.queue_dedicated_media_source_failure_steps();
return;
}
let document = document_from_node(self);
let destination = match self.media_type_id() {
HTMLMediaElementTypeId::HTMLAudioElement => Destination::Audio,
HTMLMediaElementTypeId::HTMLVideoElement => Destination::Video,
};
let mut headers = HeaderMap::new();
// FIXME(eijebong): Use typed headers once we have a constructor for the range header
headers.insert(
header::RANGE,
HeaderValue::from_str(&format!("bytes={}-", offset.unwrap_or(0))).unwrap(),
);
let url = match self.resource_url.borrow().as_ref() {
Some(url) => url.clone(),
None => self.blob_url.borrow().as_ref().unwrap().clone(),
};
let cors_setting = cors_setting_for_element(self.upcast());
let request = create_a_potential_cors_request(
url.clone(),
destination,
cors_setting,
None,
self.global().get_referrer(),
)
.headers(headers)
.origin(document.origin().immutable().clone())
.pipeline_id(Some(self.global().pipeline_id()))
.referrer_policy(document.get_referrer_policy());
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,
url.clone(),
offset.unwrap_or(0),
seek_lock,
)));
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 network_listener = NetworkListener {
context: fetch_listener,
task_source,
canceller: Some(canceller),
};
ROUTER.add_route(
action_receiver.to_opaque(),
Box::new(move |message| {
network_listener.notify_fetch(message.to().unwrap());
}),
);
let global = self.global();
global
.core_resource_thread()
.send(CoreResourceMsg::Fetch(
request,
FetchChannels::ResponseMsg(action_sender, Some(cancel_receiver)),
))
.unwrap();
}
// https://html.spec.whatwg.org/multipage/#concept-media-load-resource
fn resource_fetch_algorithm(&self, resource: Resource) {
if let Err(e) = self.setup_media_player(&resource) {
eprintln!("Setup media player error {:?}", e);
self.queue_dedicated_media_source_failure_steps();
return;
}
// Steps 1-2.
// Unapplicable, the `resource` variable already conveys which mode
// is in use.
// Step 3.
// FIXME(nox): Remove all media-resource-specific text tracks.
// Step 4.
match resource {
Resource::Url(url) => {
// Step 4.remote.1.
if self.Preload() == "none" && !self.autoplaying.get() {
// Step 4.remote.1.1.
self.network_state.set(NetworkState::Idle);
// Step 4.remote.1.2.
let window = window_from_node(self);
window
.task_manager()
.media_element_task_source()
.queue_simple_event(self.upcast(), atom!("suspend"), &window);
// Step 4.remote.1.3.
let this = Trusted::new(self);
window
.task_manager()
.media_element_task_source()
.queue(
task!(set_media_delay_load_event_flag_to_false: move || {
this.root().delay_load_event(false);
}),
window.upcast(),
)
.unwrap();
// Steps 4.remote.1.4.
// FIXME(nox): Somehow we should wait for the task from previous
// step to be ran before continuing.
// Steps 4.remote.1.5-4.remote.1.7.
// FIXME(nox): Wait for an implementation-defined event and
// then continue with the normal set of steps instead of just
// returning.
return;
}
// Step 4.remote.2.
*self.resource_url.borrow_mut() = Some(url);
self.fetch_request(None, None);
},
Resource::Object => {
if let Some(ref src_object) = *self.src_object.borrow() {
match src_object {
SrcObject::Blob(blob) => {
let blob_url = URL::CreateObjectURL(&self.global(), &*blob);
*self.blob_url.borrow_mut() =
Some(ServoUrl::parse(&blob_url).expect("infallible"));
self.fetch_request(None, None);
},
SrcObject::MediaStream(ref stream) => {
let tracks = &*stream.get_tracks();
for (pos, track) in tracks.iter().enumerate() {
if let Err(_) = self
.player
.borrow()
.as_ref()
.unwrap()
.lock()
.unwrap()
.set_stream(&track.id(), pos == tracks.len() - 1)
{
self.queue_dedicated_media_source_failure_steps();
}
}
},
}
}
},
}
}
/// Queues a task to run the [dedicated media source failure steps][steps].
///