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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/media/webrtc/desktop_media_picker_controller.h"
#include <memory>
#include <tuple>
#include <utility>
#include "base/command_line.h"
#include "base/containers/contains.h"
#include "base/functional/bind.h"
#include "base/strings/utf_string_conversions.h"
#include "base/types/expected.h"
#include "build/build_config.h"
#include "chrome/browser/media/webrtc/capture_policy_utils.h"
#include "chrome/browser/media/webrtc/desktop_media_picker.h"
#include "chrome/browser/media/webrtc/desktop_media_picker_factory_impl.h"
#include "chrome/browser/media/webrtc/media_capture_devices_dispatcher.h"
#include "chrome/browser/media/webrtc/native_desktop_media_list.h"
#include "chrome/browser/media/webrtc/tab_desktop_media_list.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/grit/branded_strings.h"
#include "content/public/browser/desktop_capture.h"
#include "content/public/browser/desktop_streams_registry.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
#include "desktop_media_picker.h"
#include "extensions/common/manifest.h"
#include "extensions/common/switches.h"
#include "media/audio/audio_features.h"
#include "media/base/media_switches.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom.h"
#include "ui/base/l10n/l10n_util.h"
using ::content::DesktopMediaID;
DesktopMediaPickerController::DesktopMediaPickerController(
DesktopMediaPickerFactory* picker_factory)
: picker_factory_(picker_factory
? picker_factory
: DesktopMediaPickerFactoryImpl::GetInstance()) {}
DesktopMediaPickerController::~DesktopMediaPickerController() = default;
void DesktopMediaPickerController::Show(
const Params& params,
const std::vector<DesktopMediaList::Type>& sources,
DesktopMediaList::WebContentsFilter includable_web_contents_filter,
DoneCallback done_callback) {
DCHECK(!base::Contains(sources, DesktopMediaList::Type::kNone));
DCHECK(!done_callback_);
done_callback_ = std::move(done_callback);
params_ = params;
Observe(params.web_contents);
// Keep same order as the input |sources| and avoid duplicates.
source_lists_ = picker_factory_->CreateMediaList(
sources, params.web_contents, std::move(includable_web_contents_filter));
if (source_lists_.empty()) {
OnPickerDialogResults("At least one source type must be specified.", {});
return;
}
if (params.select_only_screen && sources.size() == 1 &&
sources[0] == DesktopMediaList::Type::kScreen) {
// Try to bypass the picker dialog if possible.
DCHECK(source_lists_.size() == 1);
auto* source_list = source_lists_[0].get();
source_list->Update(
base::BindOnce(&DesktopMediaPickerController::OnInitialMediaListFound,
weak_factory_.GetWeakPtr()));
} else {
ShowPickerDialog();
}
}
void DesktopMediaPickerController::WebContentsDestroyed() {
OnPickerDialogResults(std::string(), DesktopMediaID());
}
// static
bool DesktopMediaPickerController::IsSystemAudioCaptureSupported(
Params::RequestSource request_source) {
if (!media::IsSystemLoopbackCaptureSupported()) {
return false;
}
#if BUILDFLAG(IS_MAC)
return request_source == Params::RequestSource::kCast ||
base::FeatureList::IsEnabled(media::kMacLoopbackAudioForScreenShare);
#elif BUILDFLAG(IS_LINUX)
if (request_source == Params::RequestSource::kCast) {
return base::FeatureList::IsEnabled(media::kPulseaudioLoopbackForCast);
} else {
return base::FeatureList::IsEnabled(
media::kPulseaudioLoopbackForScreenShare);
}
#else
return true;
#endif // BUILDFLAG(IS_MAC)
}
void DesktopMediaPickerController::OnInitialMediaListFound() {
DCHECK(params_.select_only_screen);
DCHECK(source_lists_.size() == 1);
auto* source_list = source_lists_[0].get();
if (source_list->GetSourceCount() == 1) {
// With only one possible source, the picker dialog is being bypassed. Apply
// the default value of the "audio checkbox" here for desktop screen share.
DesktopMediaID media_id = source_list->GetSource(0).id;
DCHECK_EQ(media_id.type, DesktopMediaID::TYPE_SCREEN);
media_id.audio_share =
params_.request_audio &&
IsSystemAudioCaptureSupported(params_.request_source);
OnPickerDialogResults({}, media_id);
return;
}
ShowPickerDialog();
}
void DesktopMediaPickerController::ShowPickerDialog() {
picker_ = picker_factory_->CreatePicker(nullptr);
if (!picker_) {
OnPickerDialogResults(
"Desktop Capture API is not yet implemented for this platform.", {});
return;
}
picker_->Show(
params_, std::move(source_lists_),
base::BindOnce(&DesktopMediaPickerController::OnPickerDialogResults,
// A weak pointer is used here, because although
// |picker_| can't outlive this object, it can
// schedule this callback to be invoked
// asynchronously after it has potentially been
// destroyed.
weak_factory_.GetWeakPtr(), std::string()));
}
void DesktopMediaPickerController::OnPickerDialogResults(
const std::string& err,
base::expected<content::DesktopMediaID,
blink::mojom::MediaStreamRequestResult> result) {
if (done_callback_) {
const content::DesktopMediaID source =
result.value_or(content::DesktopMediaID());
std::move(done_callback_).Run(err, source);
}
}
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