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- // Copyright 2014 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 "extensions/browser/media_capture_util.h"
- #include <algorithm>
- #include <string>
- #include <utility>
- #include "base/callback.h"
- #include "base/check.h"
- #include "content/public/browser/media_capture_devices.h"
- #include "extensions/common/extension.h"
- #include "extensions/common/permissions/permissions_data.h"
- #include "third_party/blink/public/mojom/mediastream/media_stream.mojom-shared.h"
- #include "third_party/blink/public/mojom/mediastream/media_stream.mojom.h"
- using blink::MediaStreamDevice;
- using blink::MediaStreamDevices;
- using content::MediaCaptureDevices;
- using content::MediaStreamUI;
- using extensions::mojom::APIPermissionID;
- namespace extensions {
- namespace {
- const MediaStreamDevice* GetRequestedDeviceOrDefault(
- const MediaStreamDevices& devices,
- const std::string& requested_device_id) {
- if (!requested_device_id.empty()) {
- auto it =
- std::find_if(devices.begin(), devices.end(),
- [requested_device_id](const MediaStreamDevice& device) {
- return device.id == requested_device_id;
- });
- return it != devices.end() ? &(*it) : nullptr;
- }
- if (!devices.empty())
- return &devices[0];
- return nullptr;
- }
- } // namespace
- namespace media_capture_util {
- // See also Chrome's MediaCaptureDevicesDispatcher.
- void GrantMediaStreamRequest(content::WebContents* web_contents,
- const content::MediaStreamRequest& request,
- content::MediaResponseCallback callback,
- const Extension* extension) {
- // app_shell only supports audio and video capture, not tab or screen capture.
- DCHECK(request.audio_type ==
- blink::mojom::MediaStreamType::DEVICE_AUDIO_CAPTURE ||
- request.video_type ==
- blink::mojom::MediaStreamType::DEVICE_VIDEO_CAPTURE);
- // TOOD(crbug.com/1300883): Generalize to multiple streams.
- blink::mojom::StreamDevicesSet stream_devices_set;
- stream_devices_set.stream_devices.emplace_back(
- blink::mojom::StreamDevices::New());
- blink::mojom::StreamDevices& devices = *stream_devices_set.stream_devices[0];
- if (request.audio_type ==
- blink::mojom::MediaStreamType::DEVICE_AUDIO_CAPTURE) {
- VerifyMediaAccessPermission(request.audio_type, extension);
- const MediaStreamDevice* device = GetRequestedDeviceOrDefault(
- MediaCaptureDevices::GetInstance()->GetAudioCaptureDevices(),
- request.requested_audio_device_id);
- if (device)
- devices.audio_device = *device;
- }
- if (request.video_type ==
- blink::mojom::MediaStreamType::DEVICE_VIDEO_CAPTURE) {
- VerifyMediaAccessPermission(request.video_type, extension);
- const MediaStreamDevice* device = GetRequestedDeviceOrDefault(
- MediaCaptureDevices::GetInstance()->GetVideoCaptureDevices(),
- request.requested_video_device_id);
- if (device)
- devices.video_device = *device;
- }
- // TODO(jamescook): Should we show a recording icon somewhere? If so, where?
- std::unique_ptr<MediaStreamUI> ui;
- std::move(callback).Run(
- stream_devices_set,
- (devices.audio_device.has_value() || devices.video_device.has_value())
- ? blink::mojom::MediaStreamRequestResult::OK
- : blink::mojom::MediaStreamRequestResult::INVALID_STATE,
- std::move(ui));
- }
- void VerifyMediaAccessPermission(blink::mojom::MediaStreamType type,
- const Extension* extension) {
- const PermissionsData* permissions_data = extension->permissions_data();
- if (type == blink::mojom::MediaStreamType::DEVICE_AUDIO_CAPTURE) {
- // app_shell has no UI surface to show an error, and on an embedded device
- // it's better to crash than to have a feature not work.
- CHECK(permissions_data->HasAPIPermission(APIPermissionID::kAudioCapture))
- << "Audio capture request but no audioCapture permission in manifest.";
- } else {
- DCHECK(type == blink::mojom::MediaStreamType::DEVICE_VIDEO_CAPTURE);
- CHECK(permissions_data->HasAPIPermission(APIPermissionID::kVideoCapture))
- << "Video capture request but no videoCapture permission in manifest.";
- }
- }
- bool CheckMediaAccessPermission(blink::mojom::MediaStreamType type,
- const Extension* extension) {
- const PermissionsData* permissions_data = extension->permissions_data();
- if (type == blink::mojom::MediaStreamType::DEVICE_AUDIO_CAPTURE) {
- return permissions_data->HasAPIPermission(APIPermissionID::kAudioCapture);
- }
- DCHECK(type == blink::mojom::MediaStreamType::DEVICE_VIDEO_CAPTURE);
- return permissions_data->HasAPIPermission(APIPermissionID::kVideoCapture);
- }
- } // namespace media_capture_util
- } // namespace extensions
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