summaryrefslogtreecommitdiffstats
path: root/dom/media/ipc/VideoDecoderParent.cpp
blob: b9c22392472a9ee8b91e988c3fa99a3b2b030573 (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
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "VideoDecoderParent.h"
#include "mozilla/Unused.h"
#include "mozilla/layers/CompositorThread.h"
#include "base/thread.h"
#include "mozilla/layers/TextureClient.h"
#include "mozilla/layers/VideoBridgeChild.h"
#include "mozilla/layers/ImageClient.h"
#include "MediaInfo.h"
#include "VideoDecoderManagerParent.h"
#ifdef XP_WIN
#include "WMFDecoderModule.h"
#endif

namespace mozilla {
namespace dom {

using base::Thread;
using namespace ipc;
using namespace layers;
using namespace gfx;

class KnowsCompositorVideo : public layers::KnowsCompositor
{
public:
  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(KnowsCompositorVideo, override)

  layers::TextureForwarder* GetTextureForwarder() override
  {
    return VideoBridgeChild::GetSingleton();
  }
  layers::LayersIPCActor* GetLayersIPCActor() override
  {
    return VideoBridgeChild::GetSingleton();
  }
private:
  virtual ~KnowsCompositorVideo() {}
};

VideoDecoderParent::VideoDecoderParent(VideoDecoderManagerParent* aParent,
                                       TaskQueue* aManagerTaskQueue,
                                       TaskQueue* aDecodeTaskQueue)
  : mParent(aParent)
  , mManagerTaskQueue(aManagerTaskQueue)
  , mDecodeTaskQueue(aDecodeTaskQueue)
  , mKnowsCompositor(new KnowsCompositorVideo)
  , mDestroyed(false)
{
  MOZ_COUNT_CTOR(VideoDecoderParent);
  // We hold a reference to ourselves to keep us alive until IPDL
  // explictly destroys us. There may still be refs held by
  // tasks, but no new ones should be added after we're
  // destroyed.
  mIPDLSelfRef = this;
}

VideoDecoderParent::~VideoDecoderParent()
{
  MOZ_COUNT_DTOR(VideoDecoderParent);
}

void
VideoDecoderParent::Destroy()
{
  mDecodeTaskQueue->AwaitShutdownAndIdle();
  mDestroyed = true;
  mIPDLSelfRef = nullptr;
}

bool
VideoDecoderParent::RecvInit(const VideoInfo& aInfo, const layers::TextureFactoryIdentifier& aIdentifier)
{
  mKnowsCompositor->IdentifyTextureHost(aIdentifier);

#ifdef XP_WIN
  // TODO: Ideally we wouldn't hardcode the WMF PDM, and we'd use the normal PDM
  // factory logic for picking a decoder.
  WMFDecoderModule::Init();
  RefPtr<WMFDecoderModule> pdm(new WMFDecoderModule());
  pdm->Startup();

  CreateDecoderParams params(aInfo);
  params.mTaskQueue = mDecodeTaskQueue;
  params.mCallback = this;
  params.mKnowsCompositor = mKnowsCompositor;
  params.mImageContainer = new layers::ImageContainer();

  mDecoder = pdm->CreateVideoDecoder(params);
  if (!mDecoder) {
    Unused << SendInitFailed(NS_ERROR_DOM_MEDIA_FATAL_ERR);
    return true;
  }
#else
  MOZ_ASSERT(false, "Can't use RemoteVideoDecoder on non-Windows platforms yet");
#endif

  RefPtr<VideoDecoderParent> self = this;
  mDecoder->Init()->Then(mManagerTaskQueue, __func__,
    [self] (TrackInfo::TrackType aTrack) {
      if (!self->mDestroyed) {
        nsCString hardwareReason;
        bool hardwareAccelerated = self->mDecoder->IsHardwareAccelerated(hardwareReason);
        Unused << self->SendInitComplete(hardwareAccelerated, hardwareReason);
      }
    },
    [self] (MediaResult aReason) {
      if (!self->mDestroyed) {
        Unused << self->SendInitFailed(aReason);
      }
    });
  return true;
}

bool
VideoDecoderParent::RecvInput(const MediaRawDataIPDL& aData)
{
  // XXX: This copies the data into a buffer owned by the MediaRawData. Ideally we'd just take ownership
  // of the shmem.
  RefPtr<MediaRawData> data = new MediaRawData(aData.buffer().get<uint8_t>(),
                                               aData.buffer().Size<uint8_t>());
  if (aData.buffer().Size<uint8_t>() && !data->Data()) {
    // OOM
    Error(NS_ERROR_OUT_OF_MEMORY);
    return true;
  }
  data->mOffset = aData.base().offset();
  data->mTime = aData.base().time();
  data->mTimecode = aData.base().timecode();
  data->mDuration = aData.base().duration();
  data->mKeyframe = aData.base().keyframe();

  DeallocShmem(aData.buffer());

  mDecoder->Input(data);
  return true;
}

bool
VideoDecoderParent::RecvFlush()
{
  MOZ_ASSERT(!mDestroyed);
  if (mDecoder) {
    mDecoder->Flush();
  }
  return true;
}

bool
VideoDecoderParent::RecvDrain()
{
  MOZ_ASSERT(!mDestroyed);
  mDecoder->Drain();
  return true;
}

bool
VideoDecoderParent::RecvShutdown()
{
  MOZ_ASSERT(!mDestroyed);
  if (mDecoder) {
    mDecoder->Shutdown();
  }
  mDecoder = nullptr;
  return true;
}

bool
VideoDecoderParent::RecvSetSeekThreshold(const int64_t& aTime)
{
  MOZ_ASSERT(!mDestroyed);
  mDecoder->SetSeekThreshold(media::TimeUnit::FromMicroseconds(aTime));
  return true;
}

void
VideoDecoderParent::ActorDestroy(ActorDestroyReason aWhy)
{
  MOZ_ASSERT(!mDestroyed);
  if (mDecoder) {
    mDecoder->Shutdown();
    mDecoder = nullptr;
  }
  if (mDecodeTaskQueue) {
    mDecodeTaskQueue->BeginShutdown();
  }
}

void
VideoDecoderParent::Output(MediaData* aData)
{
  MOZ_ASSERT(mDecodeTaskQueue->IsCurrentThreadIn());
  RefPtr<VideoDecoderParent> self = this;
  RefPtr<KnowsCompositor> knowsCompositor = mKnowsCompositor;
  RefPtr<MediaData> data = aData;
  mManagerTaskQueue->Dispatch(NS_NewRunnableFunction([self, knowsCompositor, data]() {
    if (self->mDestroyed) {
      return;
    }

    MOZ_ASSERT(data->mType == MediaData::VIDEO_DATA, "Can only decode videos using VideoDecoderParent!");
    VideoData* video = static_cast<VideoData*>(data.get());

    MOZ_ASSERT(video->mImage, "Decoded video must output a layer::Image to be used with VideoDecoderParent");

    RefPtr<TextureClient> texture = video->mImage->GetTextureClient(knowsCompositor);

    if (!texture) {
      texture = ImageClient::CreateTextureClientForImage(video->mImage, knowsCompositor);
    }

    if (texture && !texture->IsAddedToCompositableClient()) {
      texture->InitIPDLActor(knowsCompositor);
      texture->SetAddedToCompositableClient();
    }

    VideoDataIPDL output(MediaDataIPDL(data->mOffset,
                                       data->mTime,
                                       data->mTimecode,
                                       data->mDuration,
                                       data->mFrames,
                                       data->mKeyframe),
                         video->mDisplay,
                         texture ? self->mParent->StoreImage(video->mImage, texture) : SurfaceDescriptorGPUVideo(0),
                         video->mFrameID);
    Unused << self->SendOutput(output);
  }));
}

void
VideoDecoderParent::Error(const MediaResult& aError)
{
  MOZ_ASSERT(mDecodeTaskQueue->IsCurrentThreadIn());
  RefPtr<VideoDecoderParent> self = this;
  MediaResult error = aError;
  mManagerTaskQueue->Dispatch(NS_NewRunnableFunction([self, error]() {
    if (!self->mDestroyed) {
      Unused << self->SendError(error);
    }
  }));
}

void
VideoDecoderParent::InputExhausted()
{
  MOZ_ASSERT(mDecodeTaskQueue->IsCurrentThreadIn());
  RefPtr<VideoDecoderParent> self = this;
  mManagerTaskQueue->Dispatch(NS_NewRunnableFunction([self]() {
    if (!self->mDestroyed) {
      Unused << self->SendInputExhausted();
    }
  }));
}

void
VideoDecoderParent::DrainComplete()
{
  MOZ_ASSERT(mDecodeTaskQueue->IsCurrentThreadIn());
  RefPtr<VideoDecoderParent> self = this;
  mManagerTaskQueue->Dispatch(NS_NewRunnableFunction([self]() {
    if (!self->mDestroyed) {
      Unused << self->SendDrainComplete();
    }
  }));
}

bool
VideoDecoderParent::OnReaderTaskQueue()
{
  // Most of our calls into mDecoder come directly from IPDL so are on
  // the right thread, but not actually on the task queue. We only ever
  // run a single thread, not a pool, so this should work fine.
  return mParent->OnManagerThread();
}

} // namespace dom
} // namespace mozilla