| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef MEDIA_CAPTURE_VIDEO_SHARED_MEMORY_BUFFER_TRACKER_H_ |
| #define MEDIA_CAPTURE_VIDEO_SHARED_MEMORY_BUFFER_TRACKER_H_ |
| |
| #include "media/capture/video/video_capture_buffer_handle.h" |
| #include "media/capture/video/video_capture_buffer_tracker.h" |
| |
| namespace gfx { |
| class Size; |
| } |
| |
| namespace media { |
| |
| // A tracker backed by unsafe shared memory. An unsafe region is necessary |
| // because a buffer may be used multiple times in an output media::VideoFrame to |
| // a decoder cross-process where it is written. |
| class SharedMemoryBufferTracker final : public VideoCaptureBufferTracker { |
| public: |
| SharedMemoryBufferTracker(); |
| |
| SharedMemoryBufferTracker(const SharedMemoryBufferTracker&) = delete; |
| SharedMemoryBufferTracker& operator=(const SharedMemoryBufferTracker&) = |
| delete; |
| |
| ~SharedMemoryBufferTracker() override; |
| |
| // Implementation of VideoCaptureBufferTracker: |
| bool Init(const gfx::Size& dimensions, |
| VideoPixelFormat format, |
| const mojom::PlaneStridesPtr& strides) override; |
| bool IsReusableForFormat(const gfx::Size& dimensions, |
| VideoPixelFormat format, |
| const mojom::PlaneStridesPtr& strides) override; |
| |
| base::UnsafeSharedMemoryRegion DuplicateAsUnsafeRegion() override; |
| mojo::ScopedSharedBufferHandle DuplicateAsMojoBuffer() override; |
| std::unique_ptr<VideoCaptureBufferHandle> GetMemoryMappedAccess() override; |
| gfx::GpuMemoryBufferHandle GetGpuMemoryBufferHandle() override; |
| uint32_t GetMemorySizeInBytes() override; |
| |
| private: |
| base::UnsafeSharedMemoryRegion region_; |
| base::WritableSharedMemoryMapping mapping_; |
| }; |
| |
| } // namespace media |
| |
| #endif // MEDIA_CAPTURE_VIDEO_SHARED_MEMORY_BUFFER_TRACKER_H_ |