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/*
* Copyright 2022 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_LINUX_WAYLAND_SHARED_SCREENCAST_STREAM_H_
#define MODULES_DESKTOP_CAPTURE_LINUX_WAYLAND_SHARED_SCREENCAST_STREAM_H_
#include <memory>
#include <optional>
#include "api/ref_counted_base.h"
#include "api/scoped_refptr.h"
#include "modules/desktop_capture/desktop_capturer.h"
#include "modules/desktop_capture/mouse_cursor.h"
#include "modules/desktop_capture/screen_capture_frame_queue.h"
#include "modules/desktop_capture/shared_desktop_frame.h"
#include "rtc_base/system/rtc_export.h"
namespace webrtc {
class SharedScreenCastStreamPrivate;
class RTC_EXPORT SharedScreenCastStream
: public webrtc::RefCountedNonVirtual<SharedScreenCastStream> {
public:
class Observer {
public:
virtual void OnCursorPositionChanged() = 0;
virtual void OnCursorShapeChanged() = 0;
virtual void OnDesktopFrameChanged() = 0;
virtual void OnFailedToProcessBuffer() = 0;
virtual void OnBufferCorruptedMetadata() = 0;
virtual void OnBufferCorruptedData() = 0;
virtual void OnEmptyBuffer() = 0;
virtual void OnStreamConfigured() = 0;
virtual void OnFrameRateChanged(uint32_t frame_rate) = 0;
protected:
Observer() = default;
virtual ~Observer() = default;
};
static webrtc::scoped_refptr<SharedScreenCastStream> CreateDefault();
bool StartScreenCastStream(uint32_t stream_node_id);
bool StartScreenCastStream(uint32_t stream_node_id,
int fd,
uint32_t width = 0,
uint32_t height = 0,
bool is_cursor_embedded = false,
DesktopCapturer::Callback* callback = nullptr);
void UpdateScreenCastStreamResolution(uint32_t width, uint32_t height);
void UpdateScreenCastStreamFrameRate(uint32_t frame_rate);
void SetUseDamageRegion(bool use_damage_region);
void SetObserver(SharedScreenCastStream::Observer* observer);
void StopScreenCastStream();
// Below functions return the most recent information we get from a
// PipeWire buffer on each Process() callback. This assumes that we
// managed to successfuly connect to a PipeWire stream provided by the
// compositor (based on stream parameters). The cursor data are obtained
// from spa_meta_cursor stream metadata and therefore the cursor is not
// part of actual screen/window frame.
// Returns the most recent screen/window frame we obtained from PipeWire
// buffer. Will return an empty frame in case we didn't manage to get a frame
// from PipeWire buffer.
std::unique_ptr<SharedDesktopFrame> CaptureFrame();
// Returns the most recent mouse cursor image. Will return an nullptr cursor
// in case we didn't manage to get a cursor from PipeWire buffer. NOTE: the
// cursor image might not be updated on every cursor location change, but
// actually only when its shape changes.
std::unique_ptr<MouseCursor> CaptureCursor();
// Returns the most recent mouse cursor position. Will not return a value in
// case we didn't manage to get it from PipeWire buffer.
std::optional<DesktopVector> CaptureCursorPosition();
~SharedScreenCastStream();
protected:
SharedScreenCastStream();
private:
friend class SharedScreenCastStreamPrivate;
SharedScreenCastStream(const SharedScreenCastStream&) = delete;
SharedScreenCastStream& operator=(const SharedScreenCastStream&) = delete;
std::unique_ptr<SharedScreenCastStreamPrivate> private_;
};
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_LINUX_WAYLAND_SHARED_SCREENCAST_STREAM_H_
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