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/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_DESKTOP_CAPTURE_FAKE_DESKTOP_CAPTURER_H_
#define MODULES_DESKTOP_CAPTURE_FAKE_DESKTOP_CAPTURER_H_
#include <memory>
#include "modules/desktop_capture/desktop_capturer.h"
#include "modules/desktop_capture/desktop_frame_generator.h"
#include "modules/desktop_capture/shared_memory.h"
#include "rtc_base/system/rtc_export.h"
namespace webrtc {
// A fake implementation of DesktopCapturer or its derived interfaces to
// generate DesktopFrame for testing purpose.
//
// Consumers can provide a FrameGenerator instance to generate instances of
// DesktopFrame to return for each Capture() function call.
// If no FrameGenerator provided, FakeDesktopCapturer will always return a
// nullptr DesktopFrame.
//
// Double buffering is guaranteed by the FrameGenerator. FrameGenerator
// implements in desktop_frame_generator.h guarantee double buffering, they
// creates a new instance of DesktopFrame each time.
class RTC_EXPORT FakeDesktopCapturer : public DesktopCapturer {
public:
FakeDesktopCapturer();
~FakeDesktopCapturer() override;
// Decides the result which will be returned in next Capture() callback.
void set_result(DesktopCapturer::Result result);
// Uses the `generator` provided as DesktopFrameGenerator, FakeDesktopCapturer
// does not take the ownership of `generator`.
void set_frame_generator(DesktopFrameGenerator* generator);
// Count of DesktopFrame(s) have been returned by this instance. This field
// would never be negative.
int num_frames_captured() const;
// Count of CaptureFrame() calls have been made. This field would never be
// negative.
int num_capture_attempts() const;
// DesktopCapturer interface
void Start(DesktopCapturer::Callback* callback) override;
void CaptureFrame() override;
void SetSharedMemoryFactory(
std::unique_ptr<SharedMemoryFactory> shared_memory_factory) override;
bool GetSourceList(DesktopCapturer::SourceList* sources) override;
bool SelectSource(DesktopCapturer::SourceId id) override;
private:
static constexpr DesktopCapturer::SourceId kWindowId = 1378277495;
static constexpr DesktopCapturer::SourceId kScreenId = 1378277496;
DesktopCapturer::Callback* callback_ = nullptr;
std::unique_ptr<SharedMemoryFactory> shared_memory_factory_;
DesktopCapturer::Result result_ = Result::SUCCESS;
DesktopFrameGenerator* generator_ = nullptr;
int num_frames_captured_ = 0;
int num_capture_attempts_ = 0;
};
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_FAKE_DESKTOP_CAPTURER_H_
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