chromium/media/capture/video/shared_memory_buffer_tracker.cc

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "media/capture/video/shared_memory_buffer_tracker.h"

#include "base/check.h"
#include "base/memory/raw_ptr.h"
#include "base/notreached.h"
#include "media/base/video_frame.h"
#include "mojo/public/cpp/system/platform_handle.h"
#include "ui/gfx/geometry/size.h"

namespace {

// A local VideoCaptureBufferHandle implementation used with
// GetHandleForInProcessAccess. This does not own the mapping, so the tracker
// that generates this must outlive it.
class SharedMemoryBufferTrackerHandle : public media::VideoCaptureBufferHandle { … };

size_t CalculateRequiredBufferSize(
    const gfx::Size& dimensions,
    media::VideoPixelFormat format,
    const media::mojom::PlaneStridesPtr& strides) { … }

}  // namespace

namespace media {

SharedMemoryBufferTracker::SharedMemoryBufferTracker(bool strict_pixel_format)
    : … { … }

SharedMemoryBufferTracker::~SharedMemoryBufferTracker() = default;

bool SharedMemoryBufferTracker::Init(const gfx::Size& dimensions,
                                     VideoPixelFormat format,
                                     const mojom::PlaneStridesPtr& strides) { … }

bool SharedMemoryBufferTracker::IsReusableForFormat(
    const gfx::Size& dimensions,
    VideoPixelFormat format,
    const mojom::PlaneStridesPtr& strides) { … }

std::unique_ptr<VideoCaptureBufferHandle>
SharedMemoryBufferTracker::GetMemoryMappedAccess() { … }

base::UnsafeSharedMemoryRegion
SharedMemoryBufferTracker::DuplicateAsUnsafeRegion() { … }

gfx::GpuMemoryBufferHandle
SharedMemoryBufferTracker::GetGpuMemoryBufferHandle() { … }

VideoCaptureBufferType SharedMemoryBufferTracker::GetBufferType() { … }

uint32_t SharedMemoryBufferTracker::GetMemorySizeInBytes() { … }

}  // namespace media