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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/media/media_devices_permission_checker.h"
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/command_line.h"
#include "base/feature_list.h"
#include "content/browser/frame_host/render_frame_host_delegate.h"
#include "content/browser/frame_host/render_frame_host_impl.h"
#include "content/common/media/media_devices.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "url/gurl.h"
#include "url/origin.h"
namespace content {
namespace {
MediaDevicesManager::BoolDeviceTypes DoCheckPermissionsOnUIThread(
MediaDevicesManager::BoolDeviceTypes requested_device_types,
int render_process_id,
int render_frame_id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
RenderFrameHostImpl* frame_host =
RenderFrameHostImpl::FromID(render_process_id, render_frame_id);
// If there is no |frame_host|, return false for all permissions.
if (!frame_host)
return MediaDevicesManager::BoolDeviceTypes();
RenderFrameHostDelegate* delegate = frame_host->delegate();
url::Origin origin = frame_host->GetLastCommittedOrigin();
bool audio_permission =
delegate->CheckMediaAccessPermission(origin, MEDIA_DEVICE_AUDIO_CAPTURE);
bool mic_feature_policy = true;
bool camera_feature_policy = true;
if (base::FeatureList::IsEnabled(features::kUseFeaturePolicyForPermissions)) {
mic_feature_policy = frame_host->IsFeatureEnabled(
blink::mojom::FeaturePolicyFeature::kMicrophone);
camera_feature_policy = frame_host->IsFeatureEnabled(
blink::mojom::FeaturePolicyFeature::kCamera);
}
MediaDevicesManager::BoolDeviceTypes result;
// Speakers.
// TODO(guidou): use specific permission for audio output when it becomes
// available. See http://crbug.com/556542.
result[MEDIA_DEVICE_TYPE_AUDIO_OUTPUT] =
requested_device_types[MEDIA_DEVICE_TYPE_AUDIO_OUTPUT] &&
audio_permission;
// Mic.
result[MEDIA_DEVICE_TYPE_AUDIO_INPUT] =
requested_device_types[MEDIA_DEVICE_TYPE_AUDIO_INPUT] &&
audio_permission && mic_feature_policy;
// Camera.
result[MEDIA_DEVICE_TYPE_VIDEO_INPUT] =
requested_device_types[MEDIA_DEVICE_TYPE_VIDEO_INPUT] &&
delegate->CheckMediaAccessPermission(origin,
MEDIA_DEVICE_VIDEO_CAPTURE) &&
camera_feature_policy;
return result;
}
bool CheckSinglePermissionOnUIThread(MediaDeviceType device_type,
int render_process_id,
int render_frame_id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
MediaDevicesManager::BoolDeviceTypes requested;
requested[device_type] = true;
MediaDevicesManager::BoolDeviceTypes result = DoCheckPermissionsOnUIThread(
requested, render_process_id, render_frame_id);
return result[device_type];
}
} // namespace
MediaDevicesPermissionChecker::MediaDevicesPermissionChecker()
: use_override_(base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kUseFakeUIForMediaStream)),
override_value_(
base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kUseFakeUIForMediaStream) != "deny") {}
MediaDevicesPermissionChecker::MediaDevicesPermissionChecker(
bool override_value)
: use_override_(true), override_value_(override_value) {}
bool MediaDevicesPermissionChecker::CheckPermissionOnUIThread(
MediaDeviceType device_type,
int render_process_id,
int render_frame_id) const {
if (use_override_)
return override_value_;
return CheckSinglePermissionOnUIThread(device_type, render_process_id,
render_frame_id);
}
void MediaDevicesPermissionChecker::CheckPermission(
MediaDeviceType device_type,
int render_process_id,
int render_frame_id,
base::OnceCallback<void(bool)> callback) const {
if (use_override_) {
std::move(callback).Run(override_value_);
return;
}
BrowserThread::PostTaskAndReplyWithResult(
BrowserThread::UI, FROM_HERE,
base::BindOnce(&CheckSinglePermissionOnUIThread, device_type,
render_process_id, render_frame_id),
std::move(callback));
}
void MediaDevicesPermissionChecker::CheckPermissions(
MediaDevicesManager::BoolDeviceTypes requested,
int render_process_id,
int render_frame_id,
base::OnceCallback<void(const MediaDevicesManager::BoolDeviceTypes&)>
callback) const {
if (use_override_) {
MediaDevicesManager::BoolDeviceTypes result;
result.fill(override_value_);
std::move(callback).Run(result);
return;
}
BrowserThread::PostTaskAndReplyWithResult(
BrowserThread::UI, FROM_HERE,
base::BindOnce(&DoCheckPermissionsOnUIThread, requested,
render_process_id, render_frame_id),
std::move(callback));
}
} // namespace content
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