refactor: desktop capturer module (#14835)
* Revert "post all desktop capturer apis to worker threads"
This reverts commit 5a28759fea.
* refactor: desktop capturer module
* Creates the screen and window capturer for the liftime of the app
* Fixes incorrect usage of weak ptr
* build: add //ui/snapshot to chromium_src deps
* fix: handle scenarios when there are no captured sources
This commit is contained in:
Robo
Cheng Zhao
parent
e06bc311a9
commit
596ae2c2df
13 changed files with 465 additions and 829 deletions
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@ -8,20 +8,17 @@
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#include <utility>
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#include <vector>
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using base::PlatformThreadRef;
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#include "atom/common/api/atom_api_native_image.h"
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#include "atom/common/native_mate_converters/gfx_converter.h"
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#include "base/strings/string_number_conversions.h"
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#include "base/strings/utf_string_conversions.h"
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#include "base/task_scheduler/post_task.h"
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#include "base/threading/thread_task_runner_handle.h"
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#include "chrome/browser/media/desktop_media_list.h"
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#include "content/public/browser/browser_thread.h"
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#include "base/threading/thread_restrictions.h"
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#include "chrome/browser/media/webrtc/desktop_media_list.h"
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#include "content/public/browser/desktop_capture.h"
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#include "native_mate/dictionary.h"
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#include "third_party/webrtc/modules/desktop_capture/desktop_capture_options.h"
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#include "third_party/webrtc/modules/desktop_capture/desktop_capturer.h"
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#if defined(OS_WIN)
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#include "third_party/webrtc/modules/desktop_capture/win/dxgi_duplicator_controller.h"
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#include "third_party/webrtc/modules/desktop_capture/win/screen_capturer_win_directx.h"
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@ -51,63 +48,121 @@ struct Converter<atom::api::DesktopCapturer::Source> {
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} // namespace mate
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namespace {
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namespace atom {
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void EmitFinished(
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const std::vector<atom::api::DesktopCapturer::Source>& sources,
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atom::api::DesktopCapturer* cap) {
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cap->Emit("finished", sources);
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namespace api {
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DesktopCapturer::DesktopCapturer(v8::Isolate* isolate) {
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Init(isolate);
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}
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void StartHandlingTask(bool capture_window,
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bool capture_screen,
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const gfx::Size& thumbnail_size,
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atom::api::DesktopCapturer* cap) {
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DesktopCapturer::~DesktopCapturer() {}
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void DesktopCapturer::StartHandling(bool capture_window,
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bool capture_screen,
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const gfx::Size& thumbnail_size) {
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#if defined(OS_WIN)
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if (content::desktop_capture::CreateDesktopCaptureOptions()
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.allow_directx_capturer()) {
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// DxgiDuplicatorController should be alive in this scope according to
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// screen_capturer_win.cc.
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auto duplicator = webrtc::DxgiDuplicatorController::Instance();
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cap->using_directx_capturer_ =
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webrtc::ScreenCapturerWinDirectx::IsSupported();
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using_directx_capturer_ = webrtc::ScreenCapturerWinDirectx::IsSupported();
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}
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#endif // defined(OS_WIN)
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std::unique_ptr<webrtc::DesktopCapturer> screen_capturer(
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capture_screen ? content::desktop_capture::CreateScreenCapturer()
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: nullptr);
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std::unique_ptr<webrtc::DesktopCapturer> window_capturer(
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capture_window ? content::desktop_capture::CreateWindowCapturer()
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: nullptr);
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cap->media_list_.reset(new NativeDesktopMediaList(
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std::move(screen_capturer), std::move(window_capturer)));
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cap->media_list_->SetThumbnailSize(thumbnail_size);
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cap->media_list_->StartUpdating(cap);
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// clear any existing captured sources.
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captured_sources_.clear();
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// Start listening for captured sources.
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capture_window_ = capture_window;
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capture_screen_ = capture_screen;
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{
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// Remove this once
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// https://bugs.chromium.org/p/chromium/issues/detail?id=795340 is fixed.
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base::ScopedAllowBaseSyncPrimitivesForTesting
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scoped_allow_base_sync_primitives;
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// Initialize the source list.
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// Apply the new thumbnail size and restart capture.
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if (capture_window) {
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window_capturer_.reset(new NativeDesktopMediaList(
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content::DesktopMediaID::TYPE_WINDOW,
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content::desktop_capture::CreateWindowCapturer()));
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window_capturer_->SetThumbnailSize(thumbnail_size);
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window_capturer_->AddObserver(this);
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window_capturer_->StartUpdating();
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}
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if (capture_screen) {
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screen_capturer_.reset(new NativeDesktopMediaList(
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content::DesktopMediaID::TYPE_SCREEN,
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content::desktop_capture::CreateScreenCapturer()));
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screen_capturer_->SetThumbnailSize(thumbnail_size);
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screen_capturer_->AddObserver(this);
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screen_capturer_->StartUpdating();
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}
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}
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}
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void OnRefreshFinishedTask(atom::api::DesktopCapturer* cap) {
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const auto media_list_sources = cap->media_list_->GetSources();
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std::vector<atom::api::DesktopCapturer::Source> sources;
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for (const auto& media_list_source : media_list_sources) {
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sources.emplace_back(
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atom::api::DesktopCapturer::Source{media_list_source, std::string()});
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void DesktopCapturer::OnSourceAdded(DesktopMediaList* list, int index) {}
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void DesktopCapturer::OnSourceRemoved(DesktopMediaList* list, int index) {}
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void DesktopCapturer::OnSourceMoved(DesktopMediaList* list,
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int old_index,
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int new_index) {}
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void DesktopCapturer::OnSourceNameChanged(DesktopMediaList* list, int index) {}
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void DesktopCapturer::OnSourceThumbnailChanged(DesktopMediaList* list,
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int index) {}
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void DesktopCapturer::OnSourceUnchanged(DesktopMediaList* list) {
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UpdateSourcesList(list);
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}
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bool DesktopCapturer::ShouldScheduleNextRefresh(DesktopMediaList* list) {
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UpdateSourcesList(list);
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return false;
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}
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void DesktopCapturer::UpdateSourcesList(DesktopMediaList* list) {
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std::vector<DesktopCapturer::Source> window_sources;
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if (capture_window_ &&
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list->GetMediaListType() == content::DesktopMediaID::TYPE_WINDOW) {
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capture_window_ = false;
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const auto& media_list_sources = list->GetSources();
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for (const auto& media_list_source : media_list_sources) {
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window_sources.emplace_back(
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DesktopCapturer::Source{media_list_source, std::string()});
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}
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std::move(window_sources.begin(), window_sources.end(),
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std::back_inserter(captured_sources_));
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}
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std::vector<DesktopCapturer::Source> screen_sources;
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if (capture_screen_ &&
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list->GetMediaListType() == content::DesktopMediaID::TYPE_SCREEN) {
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capture_screen_ = false;
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const auto& media_list_sources = list->GetSources();
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for (const auto& media_list_source : media_list_sources) {
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screen_sources.emplace_back(
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DesktopCapturer::Source{media_list_source, std::string()});
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}
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#if defined(OS_WIN)
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// Gather the same unique screen IDs used by the electron.screen API in order
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// to provide an association between it and desktopCapturer/getUserMedia.
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// This is only required when using the DirectX capturer, otherwise the IDs
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// across the APIs already match.
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if (cap->using_directx_capturer_) {
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std::vector<std::string> device_names;
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// Crucially, this list of device names will be in the same order as
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// |media_list_sources|.
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webrtc::DxgiDuplicatorController::Instance()->GetDeviceNames(&device_names);
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int device_name_index = 0;
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for (auto& source : sources) {
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if (source.media_list_source.id.type ==
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content::DesktopMediaID::TYPE_SCREEN) {
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// Gather the same unique screen IDs used by the electron.screen API in
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// order to provide an association between it and
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// desktopCapturer/getUserMedia. This is only required when using the
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// DirectX capturer, otherwise the IDs across the APIs already match.
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if (using_directx_capturer_) {
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std::vector<std::string> device_names;
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// Crucially, this list of device names will be in the same order as
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// |media_list_sources|.
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webrtc::DxgiDuplicatorController::Instance()->GetDeviceNames(
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&device_names);
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int device_name_index = 0;
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for (auto& source : screen_sources) {
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const auto& device_name = device_names[device_name_index++];
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std::wstring wide_device_name;
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base::UTF8ToWide(device_name.c_str(), device_name.size(),
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@ -118,61 +173,21 @@ void OnRefreshFinishedTask(atom::api::DesktopCapturer* cap) {
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source.display_id = base::Int64ToString(device_id);
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}
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}
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}
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#elif defined(OS_MACOSX)
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// On Mac, the IDs across the APIs match.
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for (auto& source : sources) {
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if (source.media_list_source.id.type ==
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content::DesktopMediaID::TYPE_SCREEN) {
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// On Mac, the IDs across the APIs match.
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for (auto& source : screen_sources) {
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source.display_id = base::Int64ToString(source.media_list_source.id.id);
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}
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}
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#endif // defined(OS_WIN)
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// TODO(ajmacd): Add Linux support. The IDs across APIs differ but Chrome only
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// supports capturing the entire desktop on Linux. Revisit this if individual
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// screen support is added.
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// TODO(ajmacd): Add Linux support. The IDs across APIs differ but Chrome
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// only supports capturing the entire desktop on Linux. Revisit this if
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// individual screen support is added.
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std::move(screen_sources.begin(), screen_sources.end(),
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std::back_inserter(captured_sources_));
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}
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content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
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base::Bind(EmitFinished, sources, cap));
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}
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} // namespace
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namespace atom {
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namespace api {
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DesktopCapturer::DesktopCapturer(v8::Isolate* isolate) {
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Init(isolate);
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capture_thread_ = base::CreateSequencedTaskRunnerWithTraits(
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{base::WithBaseSyncPrimitives(), base::MayBlock(),
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base::TaskPriority::USER_VISIBLE});
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}
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DesktopCapturer::~DesktopCapturer() {}
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void DesktopCapturer::StartHandling(bool capture_window,
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bool capture_screen,
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const gfx::Size& thumbnail_size) {
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capture_thread_->PostTask(
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FROM_HERE, base::BindOnce(StartHandlingTask, capture_window,
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capture_screen, thumbnail_size, this));
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}
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void DesktopCapturer::OnSourceAdded(int index) {}
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void DesktopCapturer::OnSourceRemoved(int index) {}
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void DesktopCapturer::OnSourceMoved(int old_index, int new_index) {}
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void DesktopCapturer::OnSourceNameChanged(int index) {}
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void DesktopCapturer::OnSourceThumbnailChanged(int index) {}
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bool DesktopCapturer::OnRefreshFinished() {
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capture_thread_->PostTask(FROM_HERE,
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base::BindOnce(OnRefreshFinishedTask, this));
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return false;
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if (!capture_window_ && !capture_screen_)
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Emit("finished", captured_sources_);
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}
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// static
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