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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "media/capture/video/shared_memory_buffer_tracker.h" | 5 #include "media/capture/video/shared_memory_buffer_tracker.h" |
6 | 6 |
7 #include "base/memory/ptr_util.h" | 7 #include "base/memory/ptr_util.h" |
8 #include "media/capture/video/shared_memory_buffer_handle.h" | |
9 #include "mojo/public/cpp/system/platform_handle.h" | 8 #include "mojo/public/cpp/system/platform_handle.h" |
10 | 9 |
11 namespace media { | 10 namespace media { |
12 | 11 |
13 SharedMemoryBufferTracker::SharedMemoryBufferTracker() | 12 SharedMemoryBufferTracker::SharedMemoryBufferTracker() |
14 : VideoCaptureBufferTracker() {} | 13 : VideoCaptureBufferTracker() {} |
15 | 14 |
16 bool SharedMemoryBufferTracker::Init(const gfx::Size& dimensions, | 15 bool SharedMemoryBufferTracker::Init(const gfx::Size& dimensions, |
17 VideoPixelFormat format, | 16 VideoPixelFormat format, |
18 VideoPixelStorage storage_type, | 17 VideoPixelStorage storage_type, |
19 base::Lock* lock) { | 18 base::Lock* lock) { |
20 DVLOG(2) << __func__ << "allocating ShMem of " << dimensions.ToString(); | 19 DVLOG(2) << __func__ << "allocating ShMem of " << dimensions.ToString(); |
21 set_dimensions(dimensions); | 20 set_dimensions(dimensions); |
22 // |dimensions| can be 0x0 for trackers that do not require memory backing. | 21 // |dimensions| can be 0x0 for trackers that do not require memory backing. |
23 set_max_pixel_count(dimensions.GetArea()); | 22 set_max_pixel_count(dimensions.GetArea()); |
24 set_pixel_format(format); | 23 set_pixel_format(format); |
25 set_storage_type(storage_type); | 24 set_storage_type(storage_type); |
26 mapped_size_ = VideoCaptureFormat(dimensions, 0.0f, format, storage_type) | 25 mapped_size_ = VideoCaptureFormat(dimensions, 0.0f, format, storage_type) |
27 .ImageAllocationSize(); | 26 .ImageAllocationSize(); |
28 if (!mapped_size_) | 27 if (!mapped_size_) |
29 return true; | 28 return true; |
30 return shared_memory_.CreateAndMapAnonymous(mapped_size_); | 29 return shared_memory_.CreateAndMapAnonymous(mapped_size_); |
31 } | 30 } |
32 | 31 |
33 std::unique_ptr<VideoCaptureBufferHandle> | 32 std::unique_ptr<VideoCaptureBufferHandle> |
34 SharedMemoryBufferTracker::GetMemoryMappedAccess() { | 33 SharedMemoryBufferTracker::GetMemoryMappedAccess() { |
35 return base::MakeUnique<SharedMemoryBufferHandle>(&shared_memory_, | 34 return base::MakeUnique<SharedMemoryBufferHandle>(this); |
36 mapped_size_); | |
37 } | 35 } |
38 | 36 |
39 mojo::ScopedSharedBufferHandle | 37 mojo::ScopedSharedBufferHandle |
40 SharedMemoryBufferTracker::GetHandleForTransit() { | 38 SharedMemoryBufferTracker::GetHandleForTransit() { |
41 return mojo::WrapSharedMemoryHandle( | 39 return mojo::WrapSharedMemoryHandle( |
42 base::SharedMemory::DuplicateHandle(shared_memory_.handle()), | 40 base::SharedMemory::DuplicateHandle(shared_memory_.handle()), |
43 mapped_size_, false /* read_only */); | 41 mapped_size_, false /* read_only */); |
44 } | 42 } |
45 | 43 |
46 base::SharedMemoryHandle | 44 base::SharedMemoryHandle |
47 SharedMemoryBufferTracker::GetNonOwnedSharedMemoryHandleForLegacyIPC() { | 45 SharedMemoryBufferTracker::GetNonOwnedSharedMemoryHandleForLegacyIPC() { |
48 return shared_memory_.handle(); | 46 return shared_memory_.handle(); |
49 } | 47 } |
50 | 48 |
| 49 SharedMemoryBufferHandle::SharedMemoryBufferHandle( |
| 50 SharedMemoryBufferTracker* tracker) |
| 51 : tracker_(tracker) {} |
| 52 |
| 53 SharedMemoryBufferHandle::~SharedMemoryBufferHandle() = default; |
| 54 |
| 55 size_t SharedMemoryBufferHandle::mapped_size() const { |
| 56 return tracker_->mapped_size_; |
| 57 } |
| 58 |
| 59 uint8_t* SharedMemoryBufferHandle::data() { |
| 60 return static_cast<uint8_t*>(tracker_->shared_memory_.memory()); |
| 61 } |
| 62 |
| 63 const uint8_t* SharedMemoryBufferHandle::data() const { |
| 64 return static_cast<const uint8_t*>(tracker_->shared_memory_.memory()); |
| 65 } |
| 66 |
51 } // namespace media | 67 } // namespace media |
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