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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/shell/browser/media_capture_util.h"
#include <string>
#include <utility>
#include "base/callback.h"
#include "base/logging.h"
#include "content/public/browser/media_capture_devices.h"
#include "extensions/common/extension.h"
#include "extensions/common/permissions/permissions_data.h"
using content::MediaCaptureDevices;
using content::MediaStreamDevice;
using content::MediaStreamDevices;
using content::MediaStreamUI;
namespace extensions {
const MediaStreamDevice* GetRequestedDeviceOrDefault(
const MediaStreamDevices& devices,
const std::string& requested_device_id) {
if (!requested_device_id.empty())
return devices.FindById(requested_device_id);
if (!devices.empty())
return &devices[0];
return NULL;
}
namespace media_capture_util {
// See also Chrome's MediaCaptureDevicesDispatcher.
void GrantMediaStreamRequest(content::WebContents* web_contents,
const content::MediaStreamRequest& request,
const content::MediaResponseCallback& callback,
const Extension* extension) {
// app_shell only supports audio and video capture, not tab or screen capture.
DCHECK(request.audio_type == content::MEDIA_DEVICE_AUDIO_CAPTURE ||
request.video_type == content::MEDIA_DEVICE_VIDEO_CAPTURE);
MediaStreamDevices devices;
if (request.audio_type == content::MEDIA_DEVICE_AUDIO_CAPTURE) {
VerifyMediaAccessPermission(request.audio_type, extension);
const MediaStreamDevice* device = GetRequestedDeviceOrDefault(
MediaCaptureDevices::GetInstance()->GetAudioCaptureDevices(),
request.requested_audio_device_id);
if (device)
devices.push_back(*device);
}
if (request.video_type == content::MEDIA_DEVICE_VIDEO_CAPTURE) {
VerifyMediaAccessPermission(request.video_type, extension);
const MediaStreamDevice* device = GetRequestedDeviceOrDefault(
MediaCaptureDevices::GetInstance()->GetVideoCaptureDevices(),
request.requested_video_device_id);
if (device)
devices.push_back(*device);
}
// TODO(jamescook): Should we show a recording icon somewhere? If so, where?
scoped_ptr<MediaStreamUI> ui;
callback.Run(devices, devices.empty() ? content::MEDIA_DEVICE_INVALID_STATE
: content::MEDIA_DEVICE_OK,
std::move(ui));
}
void VerifyMediaAccessPermission(content::MediaStreamType type,
const Extension* extension) {
const PermissionsData* permissions_data = extension->permissions_data();
if (type == content::MEDIA_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(APIPermission::kAudioCapture))
<< "Audio capture request but no audioCapture permission in manifest.";
} else {
DCHECK(type == content::MEDIA_DEVICE_VIDEO_CAPTURE);
CHECK(permissions_data->HasAPIPermission(APIPermission::kVideoCapture))
<< "Video capture request but no videoCapture permission in manifest.";
}
}
} // namespace media_capture_util
} // namespace extensions
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