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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "services/video_capture/public/cpp/receiver_media_to_mojo_adapter.h" | |
| 6 | |
| 7 #include "media/capture/video/shared_memory_buffer_tracker.h" | |
| 8 #include "mojo/public/cpp/bindings/strong_binding.h" | |
| 9 #include "mojo/public/cpp/system/platform_handle.h" | |
| 10 | |
| 11 namespace { | |
| 12 | |
| 13 class MojoBufferHandleProvider | |
| 14 : public media::VideoCaptureDevice::Client::Buffer::HandleProvider { | |
| 15 public: | |
| 16 MojoBufferHandleProvider(mojo::ScopedSharedBufferHandle buffer_handle) | |
| 17 : buffer_handle_(std::move(buffer_handle)) {} | |
| 18 | |
| 19 // Implementation of Buffer::HandleProvider: | |
| 20 mojo::ScopedSharedBufferHandle GetHandleForInterProcessTransit() override { | |
| 21 return buffer_handle_->Clone(); | |
| 22 } | |
| 23 base::SharedMemoryHandle GetNonOwnedSharedMemoryHandleForLegacyIPC() | |
| 24 override { | |
| 25 LazyUnwrapHandleAndMapMemory(); | |
| 26 return shared_memory_->handle(); | |
| 27 } | |
| 28 std::unique_ptr<media::VideoCaptureBufferHandle> GetHandleForInProcessAccess() | |
| 29 override { | |
| 30 LazyUnwrapHandleAndMapMemory(); | |
| 31 return base::MakeUnique<media::SharedMemoryBufferHandle>( | |
| 32 &shared_memory_.value(), memory_size_); | |
| 33 } | |
| 34 | |
| 35 private: | |
| 36 void LazyUnwrapHandleAndMapMemory() { | |
| 37 if (shared_memory_.has_value()) | |
| 38 return; // already done before | |
| 39 | |
| 40 base::SharedMemoryHandle memory_handle; | |
| 41 const MojoResult result = | |
| 42 mojo::UnwrapSharedMemoryHandle(buffer_handle_->Clone(), &memory_handle, | |
| 43 &memory_size_, &read_only_flag_); | |
| 44 DCHECK_EQ(MOJO_RESULT_OK, result); | |
| 45 DCHECK_GT(memory_size_, 0u); | |
| 46 | |
| 47 shared_memory_.emplace(memory_handle, read_only_flag_); | |
| 48 if (!shared_memory_->Map(memory_size_)) { | |
| 49 DLOG(ERROR) << "LazyUnwrapHandleAndMapMemory: Map failed."; | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 mojo::ScopedSharedBufferHandle buffer_handle_; | |
| 54 base::Optional<base::SharedMemory> shared_memory_; | |
| 55 size_t memory_size_ = 0; | |
| 56 bool read_only_flag_ = false; | |
| 57 }; | |
| 58 | |
| 59 class ScopedAccessPermissionMojoToMediaAdapter | |
| 60 : public media::VideoCaptureDevice::Client::Buffer::ScopedAccessPermission { | |
| 61 public: | |
| 62 ScopedAccessPermissionMojoToMediaAdapter( | |
| 63 video_capture::mojom::ScopedAccessPermissionPtr access_permission) | |
| 64 : access_permission_(std::move(access_permission)) {} | |
| 65 | |
| 66 private: | |
| 67 video_capture::mojom::ScopedAccessPermissionPtr access_permission_; | |
| 68 }; | |
| 69 | |
| 70 } // anonymous namespace | |
| 71 | |
| 72 namespace video_capture { | |
| 73 | |
| 74 ReceiverMediaToMojoAdapter::ReceiverMediaToMojoAdapter( | |
| 75 std::unique_ptr<media::VideoFrameReceiver> receiver) | |
| 76 : receiver_(std::move(receiver)) {} | |
| 77 | |
| 78 ReceiverMediaToMojoAdapter::~ReceiverMediaToMojoAdapter() = default; | |
| 79 | |
| 80 void ReceiverMediaToMojoAdapter::OnNewBufferHandle( | |
| 81 int32_t buffer_id, | |
| 82 mojo::ScopedSharedBufferHandle buffer_handle) { | |
| 83 receiver_->OnNewBufferHandle( | |
| 84 buffer_id, | |
| 85 base::MakeUnique<MojoBufferHandleProvider>(std::move(buffer_handle))); | |
| 86 } | |
| 87 | |
| 88 void ReceiverMediaToMojoAdapter::OnFrameReadyInBuffer( | |
| 89 int32_t buffer_id, | |
| 90 int32_t frame_feedback_id, | |
| 91 mojom::ScopedAccessPermissionPtr access_permission, | |
| 92 media::mojom::VideoFrameInfoPtr frame_info) { | |
| 93 receiver_->OnFrameReadyInBuffer( | |
| 94 buffer_id, frame_feedback_id, | |
| 95 base::MakeUnique<ScopedAccessPermissionMojoToMediaAdapter>( | |
| 96 std::move(access_permission)), | |
| 97 std::move(frame_info)); | |
| 98 } | |
| 99 | |
| 100 void ReceiverMediaToMojoAdapter::OnBufferRetired(int32_t buffer_id) { | |
| 101 receiver_->OnBufferRetired(buffer_id); | |
| 102 } | |
| 103 | |
| 104 void ReceiverMediaToMojoAdapter::OnError() { | |
| 105 receiver_->OnError(); | |
| 106 } | |
| 107 | |
| 108 void ReceiverMediaToMojoAdapter::OnLog(const std::string& message) { | |
| 109 receiver_->OnLog(message); | |
| 110 } | |
| 111 | |
| 112 } // namespace video_capture | |
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Chromium Code Reviews
Issue 2844813002:
Revert of [Mojo Video Capture] Adapt video_capture service to refactored video capture stack (Closed)
