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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_CAPTURE_VIDEO_FAKE_VIDEO_CAPTURE_DEVICE_H_
#define MEDIA_CAPTURE_VIDEO_FAKE_VIDEO_CAPTURE_DEVICE_H_
#include <stdint.h>
#include <memory>
#include <vector>
#include "base/memory/raw_ptr.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "media/capture/video/video_capture_device.h"
namespace gpu {
class GpuMemoryBufferSupport;
} // namespace gpu
namespace media {
struct FakeDeviceState;
class FakePhotoDevice;
class FrameDeliverer;
class FrameDelivererFactory;
// Paints a "pacman-like" animated circle including textual information such
// as a frame count and timer.
class PacmanFramePainter {
public:
enum class Format { I420, SK_N32, Y16, NV12 };
PacmanFramePainter(Format pixel_format,
const FakeDeviceState* fake_device_state);
void PaintFrame(base::TimeDelta elapsed_time,
uint8_t* target_buffer,
int bytes_per_row = 0);
private:
void DrawGradientSquares(base::TimeDelta elapsed_time,
uint8_t* target_buffer,
int bytes_per_row);
void DrawPacman(base::TimeDelta elapsed_time,
uint8_t* target_buffer,
int bytes_per_row);
const Format pixel_format_;
raw_ptr<const FakeDeviceState> fake_device_state_ = nullptr;
};
// Implementation of VideoCaptureDevice that generates test frames. This is
// useful for testing the video capture components without having to use real
// devices. The implementation schedules delayed tasks to itself to generate and
// deliver frames at the requested rate.
class FakeVideoCaptureDevice : public VideoCaptureDevice {
public:
enum class DeliveryMode {
USE_DEVICE_INTERNAL_BUFFERS,
USE_CLIENT_PROVIDED_BUFFERS,
USE_GPU_MEMORY_BUFFERS,
};
enum class DisplayMediaType { ANY, MONITOR, WINDOW, BROWSER };
FakeVideoCaptureDevice(
const VideoCaptureFormats& supported_formats,
std::unique_ptr<FrameDelivererFactory> frame_deliverer_factory,
std::unique_ptr<FakePhotoDevice> photo_device,
std::unique_ptr<FakeDeviceState> device_state);
FakeVideoCaptureDevice(const FakeVideoCaptureDevice&) = delete;
FakeVideoCaptureDevice& operator=(const FakeVideoCaptureDevice&) = delete;
~FakeVideoCaptureDevice() override;
static void GetSupportedSizes(std::vector<gfx::Size>* supported_sizes);
// VideoCaptureDevice implementation.
void AllocateAndStart(const VideoCaptureParams& params,
std::unique_ptr<Client> client) override;
void StopAndDeAllocate() override;
void GetPhotoState(GetPhotoStateCallback callback) override;
void SetPhotoOptions(mojom::PhotoSettingsPtr settings,
SetPhotoOptionsCallback callback) override;
void TakePhoto(TakePhotoCallback callback) override;
private:
void BeepAndScheduleNextCapture(base::TimeTicks expected_execution_time);
void OnNextFrameDue(base::TimeTicks expected_execution_time, int session_id);
const VideoCaptureFormats supported_formats_;
// `photo_device_` and `frame_deliverer_factory_` both hold a raw pointer on
// `device_state_`, so they need to be declared last to be destroyed first.
const std::unique_ptr<FakeDeviceState> device_state_;
const std::unique_ptr<FakePhotoDevice> photo_device_;
const std::unique_ptr<FrameDelivererFactory> frame_deliverer_factory_;
std::unique_ptr<FrameDeliverer> frame_deliverer_;
int current_session_id_ = 0;
// Time when the next beep occurs.
base::TimeDelta beep_time_;
// Time since the fake video started rendering frames.
base::TimeDelta elapsed_time_;
base::ThreadChecker thread_checker_;
// FakeVideoCaptureDevice post tasks to itself for frame construction and
// needs to deal with asynchronous StopAndDeallocate().
base::WeakPtrFactory<FakeVideoCaptureDevice> weak_factory_{this};
};
// Represents the current state of a FakeVideoCaptureDevice.
// This is a separate struct because read-access to it is shared with several
// collaborating classes.
struct FakeDeviceState {
FakeDeviceState(double pan,
double tilt,
double zoom,
double exposure_time,
double focus_distance,
float frame_rate,
VideoPixelFormat pixel_format)
: pan(pan),
tilt(tilt),
zoom(zoom),
exposure_time(exposure_time),
focus_distance(focus_distance),
format(gfx::Size(), frame_rate, pixel_format) {
exposure_mode = (exposure_time >= 0.0f) ? mojom::MeteringMode::MANUAL
: mojom::MeteringMode::CONTINUOUS;
focus_mode = (focus_distance >= 0.0f) ? mojom::MeteringMode::MANUAL
: mojom::MeteringMode::CONTINUOUS;
}
double pan;
double tilt;
double zoom;
double exposure_time;
mojom::MeteringMode exposure_mode;
double focus_distance;
mojom::MeteringMode focus_mode;
VideoCaptureFormat format;
bool background_blur = false;
};
// A dependency needed by FakeVideoCaptureDevice.
class FrameDelivererFactory {
public:
FrameDelivererFactory(
FakeVideoCaptureDevice::DeliveryMode delivery_mode,
const FakeDeviceState* device_state,
std::unique_ptr<gpu::GpuMemoryBufferSupport> gmb_support);
~FrameDelivererFactory();
std::unique_ptr<FrameDeliverer> CreateFrameDeliverer(
const VideoCaptureFormat& format,
bool video_capture_use_gmb);
private:
const FakeVideoCaptureDevice::DeliveryMode delivery_mode_;
raw_ptr<const FakeDeviceState> device_state_ = nullptr;
std::unique_ptr<gpu::GpuMemoryBufferSupport> gmb_support_;
};
struct FakePhotoDeviceConfig {
VideoCaptureControlSupport control_support = {true, true, true};
bool should_fail_get_photo_capabilities = false;
bool should_fail_set_photo_options = false;
bool should_fail_take_photo = false;
};
// Implements the photo functionality of a FakeVideoCaptureDevice
class FakePhotoDevice {
public:
FakePhotoDevice(std::unique_ptr<PacmanFramePainter> sk_n32_painter,
const FakeDeviceState* fake_device_state,
const FakePhotoDeviceConfig& config);
~FakePhotoDevice();
void GetPhotoState(VideoCaptureDevice::GetPhotoStateCallback callback);
void SetPhotoOptions(mojom::PhotoSettingsPtr settings,
VideoCaptureDevice::SetPhotoOptionsCallback callback,
FakeDeviceState* device_state_write_access);
void TakePhoto(VideoCaptureDevice::TakePhotoCallback callback,
base::TimeDelta elapsed_time);
private:
const std::unique_ptr<PacmanFramePainter> sk_n32_painter_;
const raw_ptr<const FakeDeviceState> fake_device_state_;
const FakePhotoDeviceConfig config_;
};
} // namespace media
#endif // MEDIA_CAPTURE_VIDEO_FAKE_VIDEO_CAPTURE_DEVICE_H_
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