Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 157 insertions, 0 deletions

diff --git a/dom/media/systemservices/CamerasParent.h b/dom/media/systemservices/CamerasParent.h
new file mode 100644
index 0000000000..97e7ea0bd4
--- /dev/null
+++ b/dom/media/systemservices/CamerasParent.h
@@ -0,0 +1,157 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 ts=8 et ft=cpp : */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_CamerasParent_h
+#define mozilla_CamerasParent_h
+
+#include "CamerasChild.h"
+#include "VideoEngine.h"
+#include "mozilla/Atomics.h"
+#include "mozilla/camera/PCamerasParent.h"
+#include "mozilla/ipc/Shmem.h"
+#include "mozilla/ShmemPool.h"
+#include "api/video/video_sink_interface.h"
+#include "modules/video_capture/video_capture.h"
+#include "modules/video_capture/video_capture_defines.h"
+#include "video/render/incoming_video_stream.h"
+
+class nsIThread;
+
+namespace mozilla::camera {
+
+class CamerasParent;
+
+class CallbackHelper : public rtc::VideoSinkInterface<webrtc::VideoFrame> {
+ public:
+  CallbackHelper(CaptureEngine aCapEng, uint32_t aStreamId,
+                 CamerasParent* aParent)
+      : mCapEngine(aCapEng),
+        mStreamId(aStreamId),
+        mTrackingId(CaptureEngineToTrackingSourceStr(aCapEng), aStreamId),
+        mParent(aParent){};
+
+  // These callbacks end up running on the VideoCapture thread.
+  // From  VideoCaptureCallback
+  void OnFrame(const webrtc::VideoFrame& aVideoFrame) override;
+
+  friend CamerasParent;
+
+ private:
+  const CaptureEngine mCapEngine;
+  const uint32_t mStreamId;
+  const TrackingId mTrackingId;
+  CamerasParent* const mParent;
+};
+
+class DeliverFrameRunnable;
+
+class CamerasParent final : public PCamerasParent,
+                            private webrtc::VideoInputFeedBack {
+  using ShutdownMozPromise = media::ShutdownBlockingTicket::ShutdownMozPromise;
+
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_DELETE_ON_EVENT_TARGET(
+      CamerasParent, mPBackgroundEventTarget)
+
+ public:
+  class VideoEngineArray;
+  friend DeliverFrameRunnable;
+
+  static already_AddRefed<CamerasParent> Create();
+
+  // Messages received from the child. These run on the IPC/PBackground thread.
+  mozilla::ipc::IPCResult RecvPCamerasConstructor();
+  mozilla::ipc::IPCResult RecvAllocateCapture(
+      const CaptureEngine& aCapEngine, const nsACString& aUniqueIdUTF8,
+      const uint64_t& aWindowID) override;
+  mozilla::ipc::IPCResult RecvReleaseCapture(const CaptureEngine& aCapEngine,
+                                             const int& aCaptureId) override;
+  mozilla::ipc::IPCResult RecvNumberOfCaptureDevices(
+      const CaptureEngine& aCapEngine) override;
+  mozilla::ipc::IPCResult RecvNumberOfCapabilities(
+      const CaptureEngine& aCapEngine, const nsACString& aUniqueId) override;
+  mozilla::ipc::IPCResult RecvGetCaptureCapability(
+      const CaptureEngine& aCapEngine, const nsACString& aUniqueId,
+      const int& aIndex) override;
+  mozilla::ipc::IPCResult RecvGetCaptureDevice(
+      const CaptureEngine& aCapEngine, const int& aDeviceIndex) override;
+  mozilla::ipc::IPCResult RecvStartCapture(
+      const CaptureEngine& aCapEngine, const int& aCaptureId,
+      const VideoCaptureCapability& aIpcCaps) override;
+  mozilla::ipc::IPCResult RecvFocusOnSelectedSource(
+      const CaptureEngine& aCapEngine, const int& aCaptureId) override;
+  mozilla::ipc::IPCResult RecvStopCapture(const CaptureEngine& aCapEngine,
+                                          const int& aCaptureId) override;
+  mozilla::ipc::IPCResult RecvReleaseFrame(
+      mozilla::ipc::Shmem&& aShmem) override;
+  void ActorDestroy(ActorDestroyReason aWhy) override;
+  mozilla::ipc::IPCResult RecvEnsureInitialized(
+      const CaptureEngine& aCapEngine) override;
+
+  nsIEventTarget* GetBackgroundEventTarget() {
+    return mPBackgroundEventTarget;
+  };
+  bool IsShuttingDown() {
+    // the first 2 are pBackground only, the last is atomic
+    MOZ_ASSERT(mPBackgroundEventTarget->IsOnCurrentThread());
+    return mDestroyed;
+  };
+  ShmemBuffer GetBuffer(size_t aSize);
+
+  // helper to forward to the PBackground thread
+  int DeliverFrameOverIPC(CaptureEngine aCapEngine, uint32_t aStreamId,
+                          const TrackingId& aTrackingId, ShmemBuffer aBuffer,
+                          unsigned char* aAltBuffer,
+                          const VideoFrameProperties& aProps);
+
+  CamerasParent();
+
+ private:
+  virtual ~CamerasParent();
+
+  // We use these helpers for shutdown and for the respective IPC commands.
+  void StopCapture(const CaptureEngine& aCapEngine, int aCaptureId);
+  int ReleaseCapture(const CaptureEngine& aCapEngine, int aCaptureId);
+
+  // VideoInputFeedBack
+  void OnDeviceChange() override;
+
+  VideoEngine* EnsureInitialized(int aEngine);
+
+  // Stops any ongoing capturing and releases resources. Called on
+  // mVideoCaptureThread. Idempotent.
+  void CloseEngines();
+
+  void OnShutdown();
+
+  nsTArray<CallbackHelper*> mCallbacks;
+  // If existent, blocks xpcom shutdown while alive.
+  // Note that this makes a reference cycle that gets broken in ActorDestroy().
+  const UniquePtr<media::ShutdownBlockingTicket> mShutdownBlocker;
+  // Tracks the mShutdownBlocker shutdown handler. mPBackgroundEventTarget only.
+  MozPromiseRequestHolder<ShutdownMozPromise> mShutdownRequest;
+
+  // Local copy of sVideoCaptureThread. Guaranteed alive if non-null.
+  const nsCOMPtr<nsISerialEventTarget> mVideoCaptureThread;
+
+  // Reference to same VideoEngineArray as sEngines. Video capture thread only.
+  const RefPtr<VideoEngineArray> mEngines;
+
+  // image buffers
+  ShmemPool mShmemPool;
+
+  // PBackgroundParent thread
+  const nsCOMPtr<nsISerialEventTarget> mPBackgroundEventTarget;
+
+  // Set to true in ActorDestroy. PBackground only.
+  bool mDestroyed;
+
+  std::map<nsCString, std::map<uint32_t, webrtc::VideoCaptureCapability>>
+      mAllCandidateCapabilities;
+};
+
+}  // namespace mozilla::camera
+
+#endif  // mozilla_CameraParent_h