chromium/media/capture/video/fake_video_capture_device_factory.cc

// Copyright 2014 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/fake_video_capture_device_factory.h"

#include <array>
#include <string_view>

#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "build/build_config.h"
#include "gpu/ipc/common/gpu_memory_buffer_support.h"
#include "media/base/media_switches.h"
#include "media/base/video_facing.h"
#include "media/capture/capture_switches.h"

namespace {

// Cap the frame rate command line input to reasonable values.
static const float kFakeCaptureMinFrameRate = …;
static const float kFakeCaptureMaxFrameRate = …;

// Cap the device count command line input to reasonable values.
static const int kFakeCaptureMinDeviceCount = …;
static const int kFakeCaptureMaxDeviceCount = …;
static const int kDefaultDeviceCount = …;

constexpr char kDefaultDeviceIdMask[] = …;
static const media::FakeVideoCaptureDevice::DeliveryMode kDefaultDeliveryMode = …;
static constexpr std::array<gfx::Size, 6> kDefaultResolutions{ … };
static constexpr std::array<float, 1> kDefaultFrameRates{ … };

static const double kInitialPan = …;
static const double kInitialTilt = …;
static const double kInitialZoom = …;
static const double kInitialExposureTime = …;
static const double kInitialFocusDistance = …;

static const media::VideoPixelFormat kSupportedPixelFormats[] = …;

template <typename TElement, size_t TSize>
std::vector<TElement> ArrayToVector(const std::array<TElement, TSize>& arr) { … }

media::VideoPixelFormat GetPixelFormatFromDeviceIndex(int device_index) { … }

void AppendAllCombinationsToFormatsContainer(
    const std::vector<media::VideoPixelFormat>& pixel_formats,
    const std::vector<gfx::Size>& resolutions,
    const std::vector<float>& frame_rates,
    media::VideoCaptureFormats* output) { … }

class ErrorFakeDevice : public media::VideoCaptureDevice { … };

}  // anonymous namespace

namespace media {

FakeVideoCaptureDeviceSettings::FakeVideoCaptureDeviceSettings() = default;

FakeVideoCaptureDeviceSettings::~FakeVideoCaptureDeviceSettings() = default;

FakeVideoCaptureDeviceSettings::FakeVideoCaptureDeviceSettings(
    const FakeVideoCaptureDeviceSettings& other) = default;

constexpr char
    FakeVideoCaptureDeviceFactory::kDeviceConfigForGetPhotoStateFails[];
constexpr char
    FakeVideoCaptureDeviceFactory::kDeviceConfigForSetPhotoOptionsFails[];
constexpr char FakeVideoCaptureDeviceFactory::kDeviceConfigForTakePhotoFails[];

FakeVideoCaptureDeviceFactory::FakeVideoCaptureDeviceFactory() { … }

FakeVideoCaptureDeviceFactory::~FakeVideoCaptureDeviceFactory() = default;

// static
std::unique_ptr<VideoCaptureDevice>
FakeVideoCaptureDeviceFactory::CreateDeviceWithSettings(
    const FakeVideoCaptureDeviceSettings& settings,
    std::unique_ptr<gpu::GpuMemoryBufferSupport> gmb_support) { … }

// static
std::unique_ptr<VideoCaptureDevice>
FakeVideoCaptureDeviceFactory::CreateDeviceWithDefaultResolutions(
    VideoPixelFormat pixel_format,
    FakeVideoCaptureDevice::DeliveryMode delivery_mode,
    float frame_rate,
    std::unique_ptr<gpu::GpuMemoryBufferSupport> gmb_support) { … }

// static
std::unique_ptr<VideoCaptureDevice>
FakeVideoCaptureDeviceFactory::CreateErrorDevice() { … }

void FakeVideoCaptureDeviceFactory::SetToDefaultDevicesConfig(
    int device_count) { … }

void FakeVideoCaptureDeviceFactory::SetToCustomDevicesConfig(
    const std::vector<FakeVideoCaptureDeviceSettings>& config) { … }

VideoCaptureErrorOrDevice FakeVideoCaptureDeviceFactory::CreateDevice(
    const VideoCaptureDeviceDescriptor& device_descriptor) { … }

void FakeVideoCaptureDeviceFactory::GetDevicesInfo(
    GetDevicesInfoCallback callback) { … }

VideoCaptureFormats FakeVideoCaptureDeviceFactory::GetSupportedFormats(
    const std::string& device_id) { … }

// static
void FakeVideoCaptureDeviceFactory::ParseFakeDevicesConfigFromOptionsString(
    const std::string options_string,
    std::vector<FakeVideoCaptureDeviceSettings>* config) { … }

#if BUILDFLAG(IS_WIN)
void FakeVideoCaptureDeviceFactory::OnGpuInfoUpdate(const CHROME_LUID& luid) {
  luid_ = luid;
  if (dxgi_device_manager_) {
    dxgi_device_manager_->OnGpuInfoUpdate(luid_);
  }
}

scoped_refptr<DXGIDeviceManager>
FakeVideoCaptureDeviceFactory::GetDxgiDeviceManager() {
  return dxgi_device_manager_;
}
#endif

}  // namespace media