summaryrefslogtreecommitdiffstats
path: root/dom/media/mediacontrol/ContentMediaController.cpp
blob: 0c3bbbecdcda87c7c843fb675dede82fd690691a (plain)
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
/* 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 http://mozilla.org/MPL/2.0/. */

#include "ContentMediaController.h"

#include "MediaControlUtils.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/dom/BrowsingContext.h"
#include "mozilla/dom/CanonicalBrowsingContext.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/Telemetry.h"
#include "nsGlobalWindowInner.h"

namespace mozilla::dom {

#undef LOG
#define LOG(msg, ...)                        \
  MOZ_LOG(gMediaControlLog, LogLevel::Debug, \
          ("ContentMediaController=%p, " msg, this, ##__VA_ARGS__))

static Maybe<bool> sXPCOMShutdown;

static void InitXPCOMShutdownMonitor() {
  if (sXPCOMShutdown) {
    return;
  }
  sXPCOMShutdown.emplace(false);
  RunOnShutdown([&] { sXPCOMShutdown = Some(true); });
}

static ContentMediaController* GetContentMediaControllerFromBrowsingContext(
    BrowsingContext* aBrowsingContext) {
  MOZ_ASSERT(NS_IsMainThread());
  InitXPCOMShutdownMonitor();
  if (!aBrowsingContext || aBrowsingContext->IsDiscarded()) {
    return nullptr;
  }

  nsPIDOMWindowOuter* outer = aBrowsingContext->GetDOMWindow();
  if (!outer) {
    return nullptr;
  }

  nsGlobalWindowInner* inner =
      nsGlobalWindowInner::Cast(outer->GetCurrentInnerWindow());
  return inner ? inner->GetContentMediaController() : nullptr;
}

static already_AddRefed<BrowsingContext> GetBrowsingContextForAgent(
    uint64_t aBrowsingContextId) {
  // If XPCOM has been shutdown, then we're not able to access browsing context.
  if (sXPCOMShutdown && *sXPCOMShutdown) {
    return nullptr;
  }
  return BrowsingContext::Get(aBrowsingContextId);
}

/* static */
ContentMediaControlKeyReceiver* ContentMediaControlKeyReceiver::Get(
    BrowsingContext* aBC) {
  MOZ_ASSERT(NS_IsMainThread());
  return GetContentMediaControllerFromBrowsingContext(aBC);
}

/* static */
ContentMediaAgent* ContentMediaAgent::Get(BrowsingContext* aBC) {
  MOZ_ASSERT(NS_IsMainThread());
  return GetContentMediaControllerFromBrowsingContext(aBC);
}

void ContentMediaAgent::NotifyMediaPlaybackChanged(uint64_t aBrowsingContextId,
                                                   MediaPlaybackState aState) {
  MOZ_ASSERT(NS_IsMainThread());
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }

  LOG("Notify media %s in BC %" PRId64, ToMediaPlaybackStateStr(aState),
      bc->Id());
  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyMediaPlaybackChanged(bc, aState);
  } else {
    // Currently this only happen when we disable e10s, otherwise all controlled
    // media would be run in the content process.
    if (RefPtr<IMediaInfoUpdater> updater =
            bc->Canonical()->GetMediaController()) {
      updater->NotifyMediaPlaybackChanged(bc->Id(), aState);
    }
  }
}

void ContentMediaAgent::NotifyMediaAudibleChanged(uint64_t aBrowsingContextId,
                                                  MediaAudibleState aState) {
  MOZ_ASSERT(NS_IsMainThread());
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }

  LOG("Notify media became %s in BC %" PRId64,
      aState == MediaAudibleState::eAudible ? "audible" : "inaudible",
      bc->Id());
  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyMediaAudibleChanged(bc, aState);
  } else {
    // Currently this only happen when we disable e10s, otherwise all controlled
    // media would be run in the content process.
    if (RefPtr<IMediaInfoUpdater> updater =
            bc->Canonical()->GetMediaController()) {
      updater->NotifyMediaAudibleChanged(bc->Id(), aState);
    }
  }
}

void ContentMediaAgent::SetIsInPictureInPictureMode(
    uint64_t aBrowsingContextId, bool aIsInPictureInPictureMode) {
  MOZ_ASSERT(NS_IsMainThread());
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }

  LOG("Notify media Picture-in-Picture mode '%s' in BC %" PRId64,
      aIsInPictureInPictureMode ? "enabled" : "disabled", bc->Id());
  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyPictureInPictureModeChanged(
        bc, aIsInPictureInPictureMode);
  } else {
    // Currently this only happen when we disable e10s, otherwise all controlled
    // media would be run in the content process.
    if (RefPtr<IMediaInfoUpdater> updater =
            bc->Canonical()->GetMediaController()) {
      updater->SetIsInPictureInPictureMode(bc->Id(), aIsInPictureInPictureMode);
    }
  }
}

void ContentMediaAgent::SetDeclaredPlaybackState(
    uint64_t aBrowsingContextId, MediaSessionPlaybackState aState) {
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }

  LOG("Notify declared playback state  '%s' in BC %" PRId64,
      ToMediaSessionPlaybackStateStr(aState), bc->Id());
  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyMediaSessionPlaybackStateChanged(bc,
                                                                       aState);
    return;
  }
  // This would only happen when we disable e10s.
  if (RefPtr<IMediaInfoUpdater> updater =
          bc->Canonical()->GetMediaController()) {
    updater->SetDeclaredPlaybackState(bc->Id(), aState);
  }
}

void ContentMediaAgent::NotifySessionCreated(uint64_t aBrowsingContextId) {
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }

  LOG("Notify media session being created in BC %" PRId64, bc->Id());
  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyMediaSessionUpdated(bc, true);
    return;
  }
  // This would only happen when we disable e10s.
  if (RefPtr<IMediaInfoUpdater> updater =
          bc->Canonical()->GetMediaController()) {
    updater->NotifySessionCreated(bc->Id());
  }
}

void ContentMediaAgent::NotifySessionDestroyed(uint64_t aBrowsingContextId) {
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }

  LOG("Notify media session being destroyed in BC %" PRId64, bc->Id());
  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyMediaSessionUpdated(bc, false);
    return;
  }
  // This would only happen when we disable e10s.
  if (RefPtr<IMediaInfoUpdater> updater =
          bc->Canonical()->GetMediaController()) {
    updater->NotifySessionDestroyed(bc->Id());
  }
}

void ContentMediaAgent::UpdateMetadata(
    uint64_t aBrowsingContextId, const Maybe<MediaMetadataBase>& aMetadata) {
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }

  LOG("Notify media session metadata change in BC %" PRId64, bc->Id());
  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyUpdateMediaMetadata(bc, aMetadata);
    return;
  }
  // This would only happen when we disable e10s.
  if (RefPtr<IMediaInfoUpdater> updater =
          bc->Canonical()->GetMediaController()) {
    updater->UpdateMetadata(bc->Id(), aMetadata);
  }
}

void ContentMediaAgent::EnableAction(uint64_t aBrowsingContextId,
                                     MediaSessionAction aAction) {
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }

  LOG("Notify to enable action '%s' in BC %" PRId64,
      GetEnumString(aAction).get(), bc->Id());
  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyMediaSessionSupportedActionChanged(
        bc, aAction, true);
    return;
  }
  // This would only happen when we disable e10s.
  if (RefPtr<IMediaInfoUpdater> updater =
          bc->Canonical()->GetMediaController()) {
    updater->EnableAction(bc->Id(), aAction);
  }
}

void ContentMediaAgent::DisableAction(uint64_t aBrowsingContextId,
                                      MediaSessionAction aAction) {
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }

  LOG("Notify to disable action '%s' in BC %" PRId64,
      GetEnumString(aAction).get(), bc->Id());
  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyMediaSessionSupportedActionChanged(
        bc, aAction, false);
    return;
  }
  // This would only happen when we disable e10s.
  if (RefPtr<IMediaInfoUpdater> updater =
          bc->Canonical()->GetMediaController()) {
    updater->DisableAction(bc->Id(), aAction);
  }
}

void ContentMediaAgent::NotifyMediaFullScreenState(uint64_t aBrowsingContextId,
                                                   bool aIsInFullScreen) {
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }

  LOG("Notify %s fullscreen in BC %" PRId64,
      aIsInFullScreen ? "entered" : "left", bc->Id());
  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyMediaFullScreenState(bc, aIsInFullScreen);
    return;
  }
  // This would only happen when we disable e10s.
  if (RefPtr<IMediaInfoUpdater> updater =
          bc->Canonical()->GetMediaController()) {
    updater->NotifyMediaFullScreenState(bc->Id(), aIsInFullScreen);
  }
}

void ContentMediaAgent::UpdatePositionState(
    uint64_t aBrowsingContextId, const Maybe<PositionState>& aState) {
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }
  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyPositionStateChanged(bc, aState);
    return;
  }
  // This would only happen when we disable e10s.
  if (RefPtr<IMediaInfoUpdater> updater =
          bc->Canonical()->GetMediaController()) {
    updater->UpdatePositionState(bc->Id(), aState);
  }
}

void ContentMediaAgent::UpdateGuessedPositionState(
    uint64_t aBrowsingContextId, const nsID& aMediaId,
    const Maybe<PositionState>& aState) {
  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
  if (!bc || bc->IsDiscarded()) {
    return;
  }

  if (aState) {
    LOG("Update guessed position state for BC %" PRId64
        " media id %s (duration=%f, playbackRate=%f, position=%f)",
        bc->Id(), aMediaId.ToString().get(), aState->mDuration,
        aState->mPlaybackRate, aState->mLastReportedPlaybackPosition);
  } else {
    LOG("Clear guessed position state for BC %" PRId64 " media id %s", bc->Id(),
        aMediaId.ToString().get());
  }

  if (XRE_IsContentProcess()) {
    ContentChild* contentChild = ContentChild::GetSingleton();
    Unused << contentChild->SendNotifyGuessedPositionStateChanged(bc, aMediaId,
                                                                  aState);
    return;
  }
  // This would only happen when we disable e10s.
  if (RefPtr<IMediaInfoUpdater> updater =
          bc->Canonical()->GetMediaController()) {
    updater->UpdateGuessedPositionState(bc->Id(), aMediaId, aState);
  }
}

ContentMediaController::ContentMediaController(uint64_t aId) {
  LOG("Create content media controller for BC %" PRId64, aId);
}

void ContentMediaController::AddReceiver(
    ContentMediaControlKeyReceiver* aListener) {
  MOZ_ASSERT(NS_IsMainThread());
  mReceivers.AppendElement(aListener);
}

void ContentMediaController::RemoveReceiver(
    ContentMediaControlKeyReceiver* aListener) {
  MOZ_ASSERT(NS_IsMainThread());
  mReceivers.RemoveElement(aListener);
}

void ContentMediaController::HandleMediaKey(MediaControlKey aKey) {
  MOZ_ASSERT(NS_IsMainThread());
  if (mReceivers.IsEmpty()) {
    return;
  }
  LOG("Handle '%s' event, receiver num=%zu", GetEnumString(aKey).get(),
      mReceivers.Length());
  // We have default handlers for play, pause and stop.
  // https://w3c.github.io/mediasession/#ref-for-dom-mediasessionaction-play%E2%91%A3
  switch (aKey) {
    case MediaControlKey::Pause:
      PauseOrStopMedia();
      return;
    case MediaControlKey::Play:
      [[fallthrough]];
    case MediaControlKey::Stop:
      // When receiving `Stop`, the amount of receiver would vary during the
      // iteration, so we use the backward iteration to avoid accessing the
      // index which is over the array length.
      for (auto& receiver : Reversed(mReceivers)) {
        receiver->HandleMediaKey(aKey);
      }
      return;
    default:
      MOZ_ASSERT_UNREACHABLE("Not supported media key for default handler");
  }
}

void ContentMediaController::PauseOrStopMedia() {
  // When receiving `pause`, if a page contains playing media and paused media
  // at that moment, that means a user intends to pause those playing
  // media, not the already paused ones. Then, we're going to stop those already
  // paused media and keep those latest paused media in `mReceivers`.
  // The reason for doing that is, when resuming paused media, we only want to
  // resume latest paused media, not all media, in order to get a better user
  // experience, which matches Chrome's behavior.
  bool isAnyMediaPlaying = false;
  for (const auto& receiver : mReceivers) {
    if (receiver->IsPlaying()) {
      isAnyMediaPlaying = true;
      break;
    }
  }

  for (auto& receiver : Reversed(mReceivers)) {
    if (isAnyMediaPlaying && !receiver->IsPlaying()) {
      receiver->HandleMediaKey(MediaControlKey::Stop);
    } else {
      receiver->HandleMediaKey(MediaControlKey::Pause);
    }
  }
}

}  // namespace mozilla::dom