110 lines
3.8 KiB
C++
110 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set sw=2 ts=8 et ft=cpp : */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_VideoEngine_h
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#define mozilla_VideoEngine_h
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#include <functional>
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#include <memory>
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#include "MediaEngine.h"
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#include "VideoFrameUtils.h"
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#include "modules/video_capture/video_capture.h"
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#include "mozilla/DefineEnum.h"
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#include "mozilla/media/MediaUtils.h"
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#include "video_engine/video_capture_factory.h"
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namespace webrtc {
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class DesktopCaptureImpl;
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}
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namespace mozilla::camera {
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MOZ_DEFINE_ENUM_CLASS_WITH_TOSTRING(CaptureDeviceType,
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(Camera, Screen, Window, Browser));
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// Historically the video engine was part of webrtc
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// it was removed (and reimplemented in Talk)
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class VideoEngine {
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private:
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virtual ~VideoEngine();
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// Base cache expiration period
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// Note because cameras use HW plug event detection, this
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// only applies to screen based modes.
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static const int64_t kCacheExpiryPeriodMs = 2000;
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public:
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NS_INLINE_DECL_REFCOUNTING(VideoEngine)
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static already_AddRefed<VideoEngine> Create(
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const CaptureDeviceType& aCaptureDeviceType,
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RefPtr<VideoCaptureFactory> aVideoCaptureFactory);
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#if defined(ANDROID)
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static int SetAndroidObjects();
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#endif
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/** Returns a non-negative capture identifier or -1 on failure.
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*/
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int32_t CreateVideoCapture(const char* aDeviceUniqueIdUTF8);
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int ReleaseVideoCapture(const int32_t aId);
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// VideoEngine is responsible for any cleanup in its modules
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static void Delete(VideoEngine* aEngine) {}
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/** Returns an existing or creates a new new DeviceInfo.
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* Camera info is cached to prevent repeated lengthy polling for "realness"
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* of the hardware devices. Other types of capture, e.g. screen share info,
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* are cached for 1 second. This could be handled in a more elegant way in
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* the future.
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* @return on failure the shared_ptr will be null, otherwise it will contain
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* a DeviceInfo.
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* @see bug 1305212 https://bugzilla.mozilla.org/show_bug.cgi?id=1305212
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*/
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std::shared_ptr<webrtc::VideoCaptureModule::DeviceInfo>
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GetOrCreateVideoCaptureDeviceInfo(webrtc::VideoInputFeedBack* callBack);
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/**
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* Destroys existing DeviceInfo.
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* The DeviceInfo will be recreated the next time it is needed.
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*/
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void ClearVideoCaptureDeviceInfo();
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class CaptureEntry {
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public:
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CaptureEntry(int32_t aCapnum,
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rtc::scoped_refptr<webrtc::VideoCaptureModule> aCapture,
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webrtc::DesktopCaptureImpl* aDesktopImpl);
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int32_t Capnum() const;
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rtc::scoped_refptr<webrtc::VideoCaptureModule> VideoCapture();
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mozilla::MediaEventSource<void>* CaptureEndedEvent();
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private:
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int32_t mCapnum;
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rtc::scoped_refptr<webrtc::VideoCaptureModule> mVideoCaptureModule;
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webrtc::DesktopCaptureImpl* mDesktopImpl = nullptr;
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friend class VideoEngine;
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};
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// Returns true iff an entry for capnum exists
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bool WithEntry(const int32_t entryCapnum,
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const std::function<void(CaptureEntry& entry)>&& fn);
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private:
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VideoEngine(const CaptureDeviceType& aCaptureDeviceType,
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RefPtr<VideoCaptureFactory> aVideoCaptureFactory);
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int32_t mId;
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const CaptureDeviceType mCaptureDevType;
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RefPtr<VideoCaptureFactory> mVideoCaptureFactory;
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std::shared_ptr<webrtc::VideoCaptureModule::DeviceInfo> mDeviceInfo;
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std::map<int32_t, CaptureEntry> mCaps;
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std::map<int32_t, int32_t> mIdMap;
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// The validity period for non-camera capture device infos`
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webrtc::Timestamp mExpiryTime = webrtc::Timestamp::Micros(0);
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int32_t GenerateId();
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};
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} // namespace mozilla::camera
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#endif
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