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// 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.
#ifndef CHROME_BROWSER_MEDIA_WEBRTC_TAB_DESKTOP_MEDIA_LIST_H_
#define CHROME_BROWSER_MEDIA_WEBRTC_TAB_DESKTOP_MEDIA_LIST_H_
#include <map>
#include "base/functional/callback_helpers.h"
#include "base/task/sequenced_task_runner.h"
#include "chrome/browser/media/webrtc/desktop_media_list_base.h"
// Implementation of DesktopMediaList that shows tab/WebContents.
class TabDesktopMediaList : public DesktopMediaListBase {
public:
TabDesktopMediaList(
content::WebContents* web_contents,
DesktopMediaList::WebContentsFilter includable_web_contents_filter,
bool include_chrome_app_windows);
TabDesktopMediaList(const TabDesktopMediaList&) = delete;
TabDesktopMediaList& operator=(const TabDesktopMediaList&) = delete;
~TabDesktopMediaList() override;
void SetPreviewedSource(
const std::optional<content::DesktopMediaID>& id) override;
private:
class RefreshCompleter {
public:
explicit RefreshCompleter(const base::WeakPtr<TabDesktopMediaList> list);
~RefreshCompleter();
private:
base::WeakPtr<TabDesktopMediaList> list_;
};
typedef std::map<content::DesktopMediaID, uint32_t> ImageHashesMap;
void Refresh(bool update_thumnails) override;
// TODO(crbug.com/40187992): Combine the below logic for screenshotting with
// the very similar behaviour in current_tab_desktop_media_list.h
// Called on the UI thread after the captured image is handled. If the
// image was new, it's rescaled to the desired size and sent back in |image|.
// Otherwise, an empty Optional is sent back. In either case, |new_hash| is
// the hash value of the frame that was handled.
void OnPreviewCaptureHandled(
const content::DesktopMediaID& media_id,
std::unique_ptr<TabDesktopMediaList::RefreshCompleter> refresh_completer,
uint32_t new_hash,
const gfx::ImageSkia& image);
void StartPreviewUpdate();
void TriggerScreenshot(
int remaining_retries,
std::unique_ptr<TabDesktopMediaList::RefreshCompleter> refresh_completer);
void ScreenshotReceived(
int remaining_retries,
const content::DesktopMediaID& id,
std::unique_ptr<TabDesktopMediaList::RefreshCompleter> refresh_completer,
const SkBitmap& bitmap);
void CompleteRefreshAfterThumbnailProcessing();
// The WebContents from which the media-picker was invoked, if such
// a WebContents was ever set.
const std::optional<base::WeakPtr<content::WebContents>> web_contents_;
// The hash of the last captured preview frame. Used to detect identical
// frames and prevent needless rescaling.
std::optional<uint32_t> last_hash_;
ImageHashesMap favicon_hashes_;
const DesktopMediaList::WebContentsFilter includable_web_contents_filter_;
const bool include_chrome_app_windows_;
// Task runner used for resizing thumbnail and preview images.
scoped_refptr<base::SequencedTaskRunner> image_resize_task_runner_;
std::optional<content::DesktopMediaID> previewed_source_;
// Handle returned when incrementing the visible capturer count on the
// WebContents instance being previewed, if there is one. Allowing this to go
// out of scope, either when switching previewed sources or on destruction,
// allows the source to stop painting when not visible etc.
base::ScopedClosureRunner previewed_source_visible_keepalive_;
base::WeakPtrFactory<TabDesktopMediaList> weak_factory_{this};
};
#endif // CHROME_BROWSER_MEDIA_WEBRTC_TAB_DESKTOP_MEDIA_LIST_H_
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