summaryrefslogtreecommitdiffstats
path: root/dom/media/gmp/GMPContentParent.cpp
blob: 4483dfe78434d28ad5266b683f24d75df0039195 (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
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "GMPContentParent.h"
#include "GMPLog.h"
#include "GMPParent.h"
#include "GMPServiceChild.h"
#include "GMPVideoDecoderParent.h"
#include "GMPVideoEncoderParent.h"
#include "ChromiumCDMParent.h"
#include "mozIGeckoMediaPluginService.h"
#include "mozilla/Logging.h"
#include "mozilla/Unused.h"
#include "base/task.h"

namespace mozilla::gmp {

static const char* GetBoolString(bool aBool) {
  return aBool ? "true" : "false";
}

GMPContentParent::GMPContentParent(GMPParent* aParent)
    : mParent(aParent), mPluginId(0) {
  GMP_LOG_DEBUG("GMPContentParent::GMPContentParent(this=%p), aParent=%p", this,
                aParent);
  if (mParent) {
    SetDisplayName(mParent->GetDisplayName());
    SetPluginId(mParent->GetPluginId());
    SetPluginType(mParent->GetPluginType());
  }
}

GMPContentParent::~GMPContentParent() {
  GMP_LOG_DEBUG(
      "GMPContentParent::~GMPContentParent(this=%p) mVideoDecoders.IsEmpty=%s, "
      "mVideoEncoders.IsEmpty=%s, mChromiumCDMs.IsEmpty=%s, "
      "mCloseBlockerCount=%" PRIu32,
      this, GetBoolString(mVideoDecoders.IsEmpty()),
      GetBoolString(mVideoEncoders.IsEmpty()),
      GetBoolString(mChromiumCDMs.IsEmpty()), mCloseBlockerCount);
}

void GMPContentParent::ActorDestroy(ActorDestroyReason aWhy) {
  GMP_LOG_DEBUG("GMPContentParent::ActorDestroy(this=%p, aWhy=%d)", this,
                static_cast<int>(aWhy));
  MOZ_ASSERT(mVideoDecoders.IsEmpty() && mVideoEncoders.IsEmpty() &&
             mChromiumCDMs.IsEmpty());
}

void GMPContentParent::CheckThread() {
  MOZ_ASSERT(GMPEventTarget()->IsOnCurrentThread());
}

void GMPContentParent::ChromiumCDMDestroyed(ChromiumCDMParent* aCDM) {
  GMP_LOG_DEBUG("GMPContentParent::ChromiumCDMDestroyed(this=%p, aCDM=%p)",
                this, aCDM);
  MOZ_ASSERT(GMPEventTarget()->IsOnCurrentThread());

  MOZ_ALWAYS_TRUE(mChromiumCDMs.RemoveElement(aCDM));
  CloseIfUnused();
}

void GMPContentParent::VideoDecoderDestroyed(GMPVideoDecoderParent* aDecoder) {
  GMP_LOG_DEBUG("GMPContentParent::VideoDecoderDestroyed(this=%p, aDecoder=%p)",
                this, aDecoder);
  MOZ_ASSERT(GMPEventTarget()->IsOnCurrentThread());

  // If the constructor fails, we'll get called before it's added
  Unused << NS_WARN_IF(!mVideoDecoders.RemoveElement(aDecoder));
  CloseIfUnused();
}

void GMPContentParent::VideoEncoderDestroyed(GMPVideoEncoderParent* aEncoder) {
  GMP_LOG_DEBUG("GMPContentParent::VideoEncoderDestroyed(this=%p, aEncoder=%p)",
                this, aEncoder);
  MOZ_ASSERT(GMPEventTarget()->IsOnCurrentThread());

  // If the constructor fails, we'll get called before it's added
  Unused << NS_WARN_IF(!mVideoEncoders.RemoveElement(aEncoder));
  CloseIfUnused();
}

void GMPContentParent::AddCloseBlocker() {
  MOZ_ASSERT(GMPEventTarget()->IsOnCurrentThread());
  ++mCloseBlockerCount;
  GMP_LOG_DEBUG(
      "GMPContentParent::AddCloseBlocker(this=%p) mCloseBlockerCount=%" PRIu32,
      this, mCloseBlockerCount);
}

void GMPContentParent::RemoveCloseBlocker() {
  MOZ_ASSERT(GMPEventTarget()->IsOnCurrentThread());
  --mCloseBlockerCount;
  GMP_LOG_DEBUG(
      "GMPContentParent::RemoveCloseBlocker(this=%p) "
      "mCloseBlockerCount=%" PRIu32,
      this, mCloseBlockerCount);
  CloseIfUnused();
}

void GMPContentParent::CloseIfUnused() {
  MOZ_ASSERT(GMPEventTarget()->IsOnCurrentThread());
  GMP_LOG_DEBUG(
      "GMPContentParent::CloseIfUnused(this=%p) mVideoDecoders.IsEmpty=%s, "
      "mVideoEncoders.IsEmpty=%s, mChromiumCDMs.IsEmpty=%s, "
      "mCloseBlockerCount=%" PRIu32,
      this, GetBoolString(mVideoDecoders.IsEmpty()),
      GetBoolString(mVideoEncoders.IsEmpty()),
      GetBoolString(mChromiumCDMs.IsEmpty()), mCloseBlockerCount);
  if (mVideoDecoders.IsEmpty() && mVideoEncoders.IsEmpty() &&
      mChromiumCDMs.IsEmpty() && mCloseBlockerCount == 0) {
    RefPtr<GMPContentParent> toClose;
    if (mParent) {
      toClose = mParent->ForgetGMPContentParent();
    } else {
      toClose = this;
      RefPtr<GeckoMediaPluginServiceChild> gmp(
          GeckoMediaPluginServiceChild::GetSingleton());
      if (gmp) {
        gmp->RemoveGMPContentParent(toClose);
      }
    }
    NS_DispatchToCurrentThread(NewRunnableMethod(
        "gmp::GMPContentParent::Close", toClose, &GMPContentParent::Close));
  }
}

nsCOMPtr<nsISerialEventTarget> GMPContentParent::GMPEventTarget() {
  if (!mGMPEventTarget) {
    GMP_LOG_DEBUG("GMPContentParent::GMPEventTarget(this=%p)", this);
    nsCOMPtr<mozIGeckoMediaPluginService> mps =
        do_GetService("@mozilla.org/gecko-media-plugin-service;1");
    MOZ_ASSERT(mps);
    if (!mps) {
      return nullptr;
    }
    // Not really safe if we just grab to the mGMPEventTarget, as we don't know
    // what thread we're running on and other threads may be trying to
    // access this without locks!  However, debug only, and primary failure
    // mode outside of compiler-helped TSAN is a leak.  But better would be
    // to use swap() under a lock.
    nsCOMPtr<nsIThread> gmpThread;
    mps->GetThread(getter_AddRefs(gmpThread));
    MOZ_ASSERT(gmpThread);

    mGMPEventTarget = gmpThread;
  }

  return mGMPEventTarget;
}

already_AddRefed<ChromiumCDMParent> GMPContentParent::GetChromiumCDM(
    const nsCString& aKeySystem) {
  GMP_LOG_DEBUG("GMPContentParent::GetChromiumCDM(this=%p aKeySystem=%s)", this,
                aKeySystem.get());

  RefPtr<ChromiumCDMParent> parent = new ChromiumCDMParent(this, GetPluginId());
  // TODO: Remove parent from mChromiumCDMs in ChromiumCDMParent::Destroy().
  mChromiumCDMs.AppendElement(parent);

  if (!SendPChromiumCDMConstructor(parent, aKeySystem)) {
    MOZ_ASSERT(!mChromiumCDMs.Contains(parent));
    return nullptr;
  }

  return parent.forget();
}

nsresult GMPContentParent::GetGMPVideoDecoder(GMPVideoDecoderParent** aGMPVD) {
  GMP_LOG_DEBUG("GMPContentParent::GetGMPVideoDecoder(this=%p)", this);

  RefPtr<GMPVideoDecoderParent> vdp = new GMPVideoDecoderParent(this);
  if (!SendPGMPVideoDecoderConstructor(vdp)) {
    return NS_ERROR_FAILURE;
  }

  // This addref corresponds to the Proxy pointer the consumer is returned.
  // It's dropped by calling Close() on the interface.
  vdp.get()->AddRef();
  *aGMPVD = vdp;
  mVideoDecoders.AppendElement(vdp);

  return NS_OK;
}

nsresult GMPContentParent::GetGMPVideoEncoder(GMPVideoEncoderParent** aGMPVE) {
  GMP_LOG_DEBUG("GMPContentParent::GetGMPVideoEncoder(this=%p)", this);

  RefPtr<GMPVideoEncoderParent> vep = new GMPVideoEncoderParent(this);
  if (!SendPGMPVideoEncoderConstructor(vep)) {
    return NS_ERROR_FAILURE;
  }

  // This addref corresponds to the Proxy pointer the consumer is returned.
  // It's dropped by calling Close() on the interface.
  vep.get()->AddRef();
  *aGMPVE = vep;
  mVideoEncoders.AppendElement(vep);

  return NS_OK;
}

void GMPContentParentCloseBlocker::Destroy() {
  MOZ_ASSERT(mParent);
  MOZ_ASSERT(mEventTarget);

  if (!mEventTarget->IsOnCurrentThread()) {
    mEventTarget->Dispatch(NS_NewRunnableFunction(
        __func__, [parent = std::move(mParent), eventTarget = mEventTarget]() {
          parent->RemoveCloseBlocker();
        }));
    mEventTarget = nullptr;
    return;
  }

  mParent->RemoveCloseBlocker();
  mParent = nullptr;
  mEventTarget = nullptr;
}

}  // namespace mozilla::gmp