1 files changed, 132 insertions, 0 deletions
diff --git a/dom/media/webrtc/MediaEngineCameraVideoSource.h b/dom/media/webrtc/MediaEngineCameraVideoSource.h
new file mode 100644
index 000000000..fb9113cd6
--- /dev/null
+++ b/dom/media/webrtc/MediaEngineCameraVideoSource.h
@@ -0,0 +1,132 @@
+/* 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 MediaEngineCameraVideoSource_h
+#define MediaEngineCameraVideoSource_h
+
+#include "MediaEngine.h"
+
+#include "nsDirectoryServiceDefs.h"
+
+// conflicts with #include of scoped_ptr.h
+#undef FF
+#include "webrtc/video_engine/include/vie_capture.h"
+
+namespace mozilla {
+
+bool operator == (const webrtc::CaptureCapability& a,
+                  const webrtc::CaptureCapability& b);
+bool operator != (const webrtc::CaptureCapability& a,
+                  const webrtc::CaptureCapability& b);
+
+class MediaEngineCameraVideoSource : public MediaEngineVideoSource
+{
+public:
+  // Some subclasses use an index to track multiple instances.
+  explicit MediaEngineCameraVideoSource(int aIndex,
+                                        const char* aMonitorName = "Camera.Monitor")
+    : MediaEngineVideoSource(kReleased)
+    , mMonitor(aMonitorName)
+    , mWidth(0)
+    , mHeight(0)
+    , mInitDone(false)
+    , mHasDirectListeners(false)
+    , mCaptureIndex(aIndex)
+    , mTrackID(0)
+  {}
+
+  explicit MediaEngineCameraVideoSource(const char* aMonitorName = "Camera.Monitor")
+    : MediaEngineCameraVideoSource(0, aMonitorName) {}
+
+  void GetName(nsAString& aName) const override;
+  void GetUUID(nsACString& aUUID) const override;
+  void SetDirectListeners(bool aHasListeners) override;
+
+  bool IsFake() override
+  {
+    return false;
+  }
+
+  nsresult TakePhoto(MediaEnginePhotoCallback* aCallback) override
+  {
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+
+  uint32_t GetBestFitnessDistance(
+      const nsTArray<const NormalizedConstraintSet*>& aConstraintSets,
+      const nsString& aDeviceId) const override;
+
+  void Shutdown() override {};
+
+protected:
+  struct CapabilityCandidate {
+    explicit CapabilityCandidate(uint8_t index, uint32_t distance = 0)
+    : mIndex(index), mDistance(distance) {}
+
+    size_t mIndex;
+    uint32_t mDistance;
+  };
+  typedef nsTArray<CapabilityCandidate> CapabilitySet;
+
+  ~MediaEngineCameraVideoSource() {}
+
+  // guts for appending data to the MSG track
+  virtual bool AppendToTrack(SourceMediaStream* aSource,
+                             layers::Image* aImage,
+                             TrackID aID,
+                             StreamTime delta,
+                             const PrincipalHandle& aPrincipalHandle);
+  uint32_t GetFitnessDistance(const webrtc::CaptureCapability& aCandidate,
+                              const NormalizedConstraintSet &aConstraints,
+                              const nsString& aDeviceId) const;
+  static void TrimLessFitCandidates(CapabilitySet& set);
+  static void LogConstraints(const NormalizedConstraintSet& aConstraints);
+  static void LogCapability(const char* aHeader,
+                            const webrtc::CaptureCapability &aCapability,
+                            uint32_t aDistance);
+  virtual size_t NumCapabilities() const;
+  virtual void GetCapability(size_t aIndex, webrtc::CaptureCapability& aOut) const;
+  virtual bool ChooseCapability(const NormalizedConstraints &aConstraints,
+                                const MediaEnginePrefs &aPrefs,
+                                const nsString& aDeviceId);
+  void SetName(nsString aName);
+  void SetUUID(const char* aUUID);
+  const nsCString& GetUUID() const; // protected access
+
+  // Engine variables.
+
+  // mMonitor protects mImage access/changes, and transitions of mState
+  // from kStarted to kStopped (which are combined with EndTrack() and
+  // image changes).
+  // mMonitor also protects mSources[] and mPrincipalHandles[] access/changes.
+  // mSources[] and mPrincipalHandles[] are accessed from webrtc threads.
+
+  // All the mMonitor accesses are from the child classes.
+  Monitor mMonitor; // Monitor for processing Camera frames.
+  nsTArray<RefPtr<SourceMediaStream>> mSources; // When this goes empty, we shut down HW
+  nsTArray<PrincipalHandle> mPrincipalHandles; // Directly mapped to mSources.
+  RefPtr<layers::Image> mImage;
+  RefPtr<layers::ImageContainer> mImageContainer;
+  int mWidth, mHeight; // protected with mMonitor on Gonk due to different threading
+  // end of data protected by mMonitor
+
+
+  bool mInitDone;
+  bool mHasDirectListeners;
+  int mCaptureIndex;
+  TrackID mTrackID;
+
+  webrtc::CaptureCapability mCapability;
+
+  mutable nsTArray<webrtc::CaptureCapability> mHardcodedCapabilities;
+private:
+  nsString mDeviceName;
+  nsCString mUniqueId;
+  nsString mFacingMode;
+};
+
+
+} // namespace mozilla
+
+#endif // MediaEngineCameraVideoSource_h