90 lines
3.7 KiB
C++
90 lines
3.7 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE-CHROMIUM file.
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#ifndef ATOM_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_
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#define ATOM_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_
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#include <string>
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#include "base/memory/singleton.h"
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#include "content/public/browser/media_observer.h"
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#include "content/public/browser/media_stream_request.h"
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#include "third_party/blink/public/common/mediastream/media_stream_request.h"
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namespace atom {
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// This singleton is used to receive updates about media events from the content
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// layer.
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class MediaCaptureDevicesDispatcher : public content::MediaObserver {
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public:
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static MediaCaptureDevicesDispatcher* GetInstance();
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// Methods for observers. Called on UI thread.
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const blink::MediaStreamDevices& GetAudioCaptureDevices();
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const blink::MediaStreamDevices& GetVideoCaptureDevices();
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// Helper to get the default devices which can be used by the media request.
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// Uses the first available devices if the default devices are not available.
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// If the return list is empty, it means there is no available device on the
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// OS.
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// Called on the UI thread.
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void GetDefaultDevices(bool audio,
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bool video,
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blink::MediaStreamDevices* devices);
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// Helpers for picking particular requested devices, identified by raw id.
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// If the device requested is not available it will return NULL.
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const blink::MediaStreamDevice* GetRequestedAudioDevice(
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const std::string& requested_audio_device_id);
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const blink::MediaStreamDevice* GetRequestedVideoDevice(
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const std::string& requested_video_device_id);
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// Returns the first available audio or video device, or NULL if no devices
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// are available.
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const blink::MediaStreamDevice* GetFirstAvailableAudioDevice();
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const blink::MediaStreamDevice* GetFirstAvailableVideoDevice();
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// Unittests that do not require actual device enumeration should call this
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// API on the singleton. It is safe to call this multiple times on the
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// signleton.
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void DisableDeviceEnumerationForTesting();
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// Overridden from content::MediaObserver:
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void OnAudioCaptureDevicesChanged() override;
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void OnVideoCaptureDevicesChanged() override;
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void OnMediaRequestStateChanged(int render_process_id,
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int render_view_id,
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int page_request_id,
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const GURL& security_origin,
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blink::MediaStreamType stream_type,
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content::MediaRequestState state) override;
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void OnCreatingAudioStream(int render_process_id,
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int render_view_id) override;
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void OnSetCapturingLinkSecured(int render_process_id,
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int render_frame_id,
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int page_request_id,
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blink::MediaStreamType stream_type,
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bool is_secure) override;
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private:
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friend struct base::DefaultSingletonTraits<MediaCaptureDevicesDispatcher>;
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MediaCaptureDevicesDispatcher();
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~MediaCaptureDevicesDispatcher() override;
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// Only for testing, a list of cached audio capture devices.
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blink::MediaStreamDevices test_audio_devices_;
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// Only for testing, a list of cached video capture devices.
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blink::MediaStreamDevices test_video_devices_;
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// Flag used by unittests to disable device enumeration.
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bool is_device_enumeration_disabled_;
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DISALLOW_COPY_AND_ASSIGN(MediaCaptureDevicesDispatcher);
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};
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} // namespace atom
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#endif // ATOM_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_
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