refactor: simplify desktop_capturer patch (#30685)

patches/chromium/desktop_media_list.patch

@@ -3,154 +3,67 @@ From: deepak1556 <[email protected]>
 Date: Thu, 18 Oct 2018 17:07:01 -0700
 Subject: desktop_media_list.patch
 
-Our current desktop capturer api is a one-shot call to the underlying
-implementation, i.e. a user calls desktopCapturer.getSources with the
-interested source type, we then return a promise that will eventually
-resolve with the sources and their thumbnails which are returned from
-the implementation in a given frame.
-
-* The core of this work is done by NativeDesktopMediaList in //chrome/browser/media/webrtc/native_desktop_media_list.cc.
-* DesktopMediaListObserver (//chrome/browser/media/webrtc/desktop_media_list_observer.h)
-  is the observer class that gets signalled with the sources from
-  NativeDesktopMediaList, our desktopcapturer api class is an
-  implementation of the DesktopMediaListObserver to receive those
-  signals.
-* To set the observer on NativeDesktopMediaList  we had to call
-  DesktopMediaList::StartUpdating https://source.chromium.org/chromium/chromium/src/+/main:chrome/browser/media/webrtc/desktop_media_list.h;l=74;drc=09a4396a448775456084fe36bb84662f5757d988;
-  but this call is not a one-shot but rather repeats the observer
-  signals for every frame. This is the call which chrome currently
-  uses.
+* Use our grit resources instead of the chrome ones.
 * Disabled WindowCaptureMacV2 feature for https://github.com/electron/electron/pull/30507
 
-This patch allows us to get the one-shot effect with the above classes.
-
 diff --git a/chrome/browser/media/webrtc/desktop_media_list.h b/chrome/browser/media/webrtc/desktop_media_list.h
-index d9737047f54bbf3811ae2a347790f6b3d286da3d..6a038c68bb7f31b8fe145a4a345d95a3e659cd48 100644
+index d9737047f54bbf3811ae2a347790f6b3d286da3d..5b69c3a4ade9fa7f105f42ebf0e82750a83cf276 100644
 --- a/chrome/browser/media/webrtc/desktop_media_list.h
 +++ b/chrome/browser/media/webrtc/desktop_media_list.h
-@@ -59,6 +59,9 @@ class DesktopMediaList {
- 
-   virtual ~DesktopMediaList() {}
- 
-+  // Allows listening to notifications generated by the model.
-+  virtual void AddObserver(DesktopMediaListObserver* observer) = 0;
-+
-   // Sets time interval between updates. By default list of sources and their
-   // thumbnail are updated once per second. If called after StartUpdating() then
-   // it will take effect only after the next update.
-@@ -90,6 +93,7 @@ class DesktopMediaList {
+@@ -86,7 +86,7 @@ class DesktopMediaList {
+   // once per DesktopMediaList instance.  It should not be called after
+   // StartUpdating(), and StartUpdating() should not be called until |callback|
+   // has been called.
+-  virtual void Update(UpdateCallback callback) = 0;
++  virtual void Update(UpdateCallback callback, bool fetch_thumbnails = false) = 0;
  
    virtual int GetSourceCount() const = 0;
    virtual const Source& GetSource(int index) const = 0;
-+  virtual const std::vector<Source>& GetSources() const = 0;
- 
-   virtual Type GetMediaListType() const = 0;
- };
 diff --git a/chrome/browser/media/webrtc/desktop_media_list_base.cc b/chrome/browser/media/webrtc/desktop_media_list_base.cc
-index a3e1de40e843b5450f417a0455e0e7d7dee1d1bd..2f7f96a5d56d503fc231ca3c96be243cf7cbb389 100644
+index a3e1de40e843b5450f417a0455e0e7d7dee1d1bd..63befdc162a4b4a16e8c5099abb0f5af602894fc 100644
 --- a/chrome/browser/media/webrtc/desktop_media_list_base.cc
 +++ b/chrome/browser/media/webrtc/desktop_media_list_base.cc
-@@ -24,6 +24,11 @@ DesktopMediaListBase::DesktopMediaListBase(base::TimeDelta update_period,
- 
- DesktopMediaListBase::~DesktopMediaListBase() = default;
+@@ -54,11 +54,11 @@ void DesktopMediaListBase::StartUpdating(DesktopMediaListObserver* observer) {
+   Refresh(true);
+ }
  
-+void DesktopMediaListBase::AddObserver(DesktopMediaListObserver* observer) {
-+  DCHECK(!observer_);
-+  observer_ = observer;
-+}
-+
- void DesktopMediaListBase::SetUpdatePeriod(base::TimeDelta period) {
-   DCHECK(!observer_);
-   update_period_ = period;
-@@ -58,7 +63,7 @@ void DesktopMediaListBase::Update(UpdateCallback callback) {
+-void DesktopMediaListBase::Update(UpdateCallback callback) {
++void DesktopMediaListBase::Update(UpdateCallback callback, bool refresh_thumbnails) {
    DCHECK(sources_.empty());
    DCHECK(!refresh_callback_);
    refresh_callback_ = std::move(callback);
 -  Refresh(false);
-+  Refresh(true);
++  Refresh(refresh_thumbnails);
  }
  
  int DesktopMediaListBase::GetSourceCount() const {
-@@ -72,6 +77,11 @@ const DesktopMediaList::Source& DesktopMediaListBase::GetSource(
-   return sources_[index];
- }
- 
-+const std::vector<DesktopMediaList::Source>& DesktopMediaListBase::GetSources()
-+    const {
-+  return sources_;
-+}
-+
- DesktopMediaList::Type DesktopMediaListBase::GetMediaListType() const {
-   return type_;
- }
-@@ -83,6 +93,12 @@ DesktopMediaListBase::SourceDescription::SourceDescription(
- 
- void DesktopMediaListBase::UpdateSourcesList(
-     const std::vector<SourceDescription>& new_sources) {
-+  // Notify observer when there was no new source captured.
-+  if (new_sources.empty()) {
-+    observer_->OnSourceUnchanged(this);
-+    return;
-+  }
-+
-   typedef std::set<DesktopMediaID> SourceSet;
-   SourceSet new_source_set;
-   for (size_t i = 0; i < new_sources.size(); ++i) {
 diff --git a/chrome/browser/media/webrtc/desktop_media_list_base.h b/chrome/browser/media/webrtc/desktop_media_list_base.h
-index a1038183d5b44ca760576bff55534b5841e2e9d2..d036a4e630e9ba8311cf7670a53b12ac33fdd2ef 100644
+index a1038183d5b44ca760576bff55534b5841e2e9d2..e9cc308271c561b249ace7dc9e703b549fcfbbd2 100644
 --- a/chrome/browser/media/webrtc/desktop_media_list_base.h
 +++ b/chrome/browser/media/webrtc/desktop_media_list_base.h
-@@ -27,6 +27,7 @@ class DesktopMediaListBase : public DesktopMediaList {
-   ~DesktopMediaListBase() override;
- 
-   // DesktopMediaList interface.
-+  void AddObserver(DesktopMediaListObserver* observer) override;
-   void SetUpdatePeriod(base::TimeDelta period) override;
+@@ -31,7 +31,7 @@ class DesktopMediaListBase : public DesktopMediaList {
    void SetThumbnailSize(const gfx::Size& thumbnail_size) override;
    void SetViewDialogWindowId(content::DesktopMediaID dialog_id) override;
-@@ -34,6 +35,7 @@ class DesktopMediaListBase : public DesktopMediaList {
-   void Update(UpdateCallback callback) override;
+   void StartUpdating(DesktopMediaListObserver* observer) override;
+-  void Update(UpdateCallback callback) override;
++  void Update(UpdateCallback callback, bool refresh_thumbnails) override;
    int GetSourceCount() const override;
    const Source& GetSource(int index) const override;
-+  const std::vector<Source>& GetSources() const override;
    DesktopMediaList::Type GetMediaListType() const override;
- 
-   static uint32_t GetImageHash(const gfx::Image& image);
-diff --git a/chrome/browser/media/webrtc/desktop_media_list_observer.h b/chrome/browser/media/webrtc/desktop_media_list_observer.h
-index ad7f766a36b1b6b2a8bc0f96369f1aaadf6681f7..f6c6c14a0937430df62c9b9c1132c5916a9f2009 100644
---- a/chrome/browser/media/webrtc/desktop_media_list_observer.h
-+++ b/chrome/browser/media/webrtc/desktop_media_list_observer.h
-@@ -20,6 +20,7 @@ class DesktopMediaListObserver {
-                              int new_index) = 0;
-   virtual void OnSourceNameChanged(DesktopMediaList* list, int index) = 0;
-   virtual void OnSourceThumbnailChanged(DesktopMediaList* list, int index) = 0;
-+  virtual void OnSourceUnchanged(DesktopMediaList* list) = 0;
- 
-  protected:
-   virtual ~DesktopMediaListObserver() {}
 diff --git a/chrome/browser/media/webrtc/native_desktop_media_list.cc b/chrome/browser/media/webrtc/native_desktop_media_list.cc
-index 5a851f4c89b4ed2b41640bf8bad47b7d8eba8ca1..7687bad18acad2cd607d14d3d3ac39f81e7dcc8a 100644
+index 5a851f4c89b4ed2b41640bf8bad47b7d8eba8ca1..2dc65acfc355180dc966aab76b39fc1956325b84 100644
 --- a/chrome/browser/media/webrtc/native_desktop_media_list.cc
 +++ b/chrome/browser/media/webrtc/native_desktop_media_list.cc
-@@ -11,15 +11,16 @@
- #include "base/hash/hash.h"
- #include "base/message_loop/message_pump_type.h"
- #include "base/single_thread_task_runner.h"
-+#include "base/strings/string_number_conversions.h"
- #include "base/strings/utf_string_conversions.h"
- #include "base/threading/thread_restrictions.h"
+@@ -16,7 +16,7 @@
  #include "base/threading/thread_task_runner_handle.h"
  #include "build/build_config.h"
  #include "chrome/browser/media/webrtc/desktop_media_list.h"
 -#include "chrome/grit/generated_resources.h"
++#include "electron/grit/electron_resources.h"
  #include "content/public/browser/browser_task_traits.h"
  #include "content/public/browser/browser_thread.h"
  #include "content/public/common/content_features.h"
-+#include "electron/grit/electron_resources.h"
- #include "media/base/video_util.h"
- #include "third_party/libyuv/include/libyuv/scale_argb.h"
- #include "third_party/skia/include/core/SkBitmap.h"
-@@ -94,8 +95,9 @@ gfx::ImageSkia ScaleDesktopFrame(std::unique_ptr<webrtc::DesktopFrame> frame,
+@@ -94,8 +94,9 @@ gfx::ImageSkia ScaleDesktopFrame(std::unique_ptr<webrtc::DesktopFrame> frame,
  }
  
  #if defined(OS_MAC)
@@ -161,12 +74,12 @@ index 5a851f4c89b4ed2b41640bf8bad47b7d8eba8ca1..7687bad18acad2cd607d14d3d3ac39f8
  #endif
  
  }  // namespace
-@@ -271,6 +273,8 @@ void NativeDesktopMediaList::Worker::RefreshNextThumbnail() {
-       FROM_HERE,
-       base::BindOnce(&NativeDesktopMediaList::UpdateNativeThumbnailsFinished,
-                      media_list_));
-+
-+  capturer_.reset();
+@@ -425,6 +426,8 @@ void NativeDesktopMediaList::RefreshForVizFrameSinkWindows(
+         FROM_HERE, base::BindOnce(&Worker::RefreshThumbnails,
+                                   base::Unretained(worker_.get()),
+                                   std::move(native_ids), thumbnail_size_));
++  } else {
++    OnRefreshComplete();
+   }
  }
  
- void NativeDesktopMediaList::Worker::OnCaptureResult(

shell/browser/api/electron_api_desktop_capturer.cc

@@ -99,10 +99,11 @@ void DesktopCapturer::StartHandling(bool capture_window,
           DesktopMediaList::Type::kWindow,
           content::desktop_capture::CreateWindowCapturer());
       window_capturer_->SetThumbnailSize(thumbnail_size);
-      window_capturer_->AddObserver(this);
-      window_capturer_->Update(base::BindOnce(
-          &DesktopCapturer::UpdateSourcesList, weak_ptr_factory_.GetWeakPtr(),
-          window_capturer_.get()));
+      window_capturer_->Update(
+          base::BindOnce(&DesktopCapturer::UpdateSourcesList,
+                         weak_ptr_factory_.GetWeakPtr(),
+                         window_capturer_.get()),
+          /* refresh_thumbnails = */ true);
     }
 
     if (capture_screen) {
@@ -110,28 +111,24 @@ void DesktopCapturer::StartHandling(bool capture_window,
           DesktopMediaList::Type::kScreen,
           content::desktop_capture::CreateScreenCapturer());
       screen_capturer_->SetThumbnailSize(thumbnail_size);
-      screen_capturer_->AddObserver(this);
-      screen_capturer_->Update(base::BindOnce(
-          &DesktopCapturer::UpdateSourcesList, weak_ptr_factory_.GetWeakPtr(),
-          screen_capturer_.get()));
+      screen_capturer_->Update(
+          base::BindOnce(&DesktopCapturer::UpdateSourcesList,
+                         weak_ptr_factory_.GetWeakPtr(),
+                         screen_capturer_.get()),
+          /* refresh_thumbnails = */ true);
     }
   }
 }
 
-void DesktopCapturer::OnSourceUnchanged(DesktopMediaList* list) {
-  UpdateSourcesList(list);
-}
-
 void DesktopCapturer::UpdateSourcesList(DesktopMediaList* list) {
   if (capture_window_ &&
       list->GetMediaListType() == DesktopMediaList::Type::kWindow) {
     capture_window_ = false;
-    const auto& media_list_sources = list->GetSources();
     std::vector<DesktopCapturer::Source> window_sources;
-    window_sources.reserve(media_list_sources.size());
-    for (const auto& media_list_source : media_list_sources) {
+    window_sources.reserve(list->GetSourceCount());
+    for (int i = 0; i < list->GetSourceCount(); i++) {
       window_sources.emplace_back(DesktopCapturer::Source{
-          media_list_source, std::string(), fetch_window_icons_});
+          list->GetSource(i), std::string(), fetch_window_icons_});
     }
     std::move(window_sources.begin(), window_sources.end(),
               std::back_inserter(captured_sources_));
@@ -140,12 +137,11 @@ void DesktopCapturer::UpdateSourcesList(DesktopMediaList* list) {
   if (capture_screen_ &&
       list->GetMediaListType() == DesktopMediaList::Type::kScreen) {
     capture_screen_ = false;
-    const auto& media_list_sources = list->GetSources();
     std::vector<DesktopCapturer::Source> screen_sources;
-    screen_sources.reserve(media_list_sources.size());
-    for (const auto& media_list_source : media_list_sources) {
+    screen_sources.reserve(list->GetSourceCount());
+    for (int i = 0; i < list->GetSourceCount(); i++) {
       screen_sources.emplace_back(
-          DesktopCapturer::Source{media_list_source, std::string()});
+          DesktopCapturer::Source{list->GetSource(i), std::string()});
     }
 #if defined(OS_WIN)
     // Gather the same unique screen IDs used by the electron.screen API in

shell/browser/api/electron_api_desktop_capturer.h

@@ -57,7 +57,6 @@ class DesktopCapturer : public gin::Wrappable<DesktopCapturer>,
                      int new_index) override {}
   void OnSourceNameChanged(DesktopMediaList* list, int index) override {}
   void OnSourceThumbnailChanged(DesktopMediaList* list, int index) override {}
-  void OnSourceUnchanged(DesktopMediaList* list) override;
 
  private:
   void UpdateSourcesList(DesktopMediaList* list);