зеркало из https://github.com/mozilla/gecko-dev.git
129 строки
4.1 KiB
C++
129 строки
4.1 KiB
C++
/* 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 MediaEngineCameraVideoSource_h
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#define MediaEngineCameraVideoSource_h
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#include "MediaEngine.h"
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#include "MediaTrackConstraints.h"
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#include "nsDirectoryServiceDefs.h"
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// conflicts with #include of scoped_ptr.h
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#undef FF
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#include "webrtc/video_engine/include/vie_capture.h"
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namespace mozilla {
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class MediaEngineCameraVideoSource : public MediaEngineVideoSource,
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private MediaConstraintsHelper
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{
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public:
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explicit MediaEngineCameraVideoSource(int aIndex,
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const char* aMonitorName = "Camera.Monitor")
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: MediaEngineVideoSource(kReleased)
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, mMonitor(aMonitorName)
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, mWidth(0)
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, mHeight(0)
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, mInitDone(false)
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, mHasDirectListeners(false)
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, mNrAllocations(0)
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, mCaptureIndex(aIndex)
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, mTrackID(0)
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{}
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void GetName(nsAString& aName) override;
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void GetUUID(nsACString& aUUID) override;
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void SetDirectListeners(bool aHasListeners) override;
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bool IsFake() override
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{
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return false;
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}
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nsresult TakePhoto(MediaEnginePhotoCallback* aCallback) override
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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uint32_t GetBestFitnessDistance(
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const nsTArray<const dom::MediaTrackConstraintSet*>& aConstraintSets,
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const nsString& aDeviceId) override;
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void Shutdown() override {};
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protected:
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struct CapabilityCandidate {
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explicit CapabilityCandidate(uint8_t index, uint32_t distance = 0)
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: mIndex(index), mDistance(distance) {}
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size_t mIndex;
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uint32_t mDistance;
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};
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typedef nsTArray<CapabilityCandidate> CapabilitySet;
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~MediaEngineCameraVideoSource() {}
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// guts for appending data to the MSG track
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virtual bool AppendToTrack(SourceMediaStream* aSource,
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layers::Image* aImage,
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TrackID aID,
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StreamTime delta);
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uint32_t GetFitnessDistance(const webrtc::CaptureCapability& aCandidate,
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const dom::MediaTrackConstraintSet &aConstraints,
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bool aAdvanced,
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const nsString& aDeviceId);
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static void TrimLessFitCandidates(CapabilitySet& set);
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static void LogConstraints(const dom::MediaTrackConstraintSet& aConstraints,
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bool aAdvanced);
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static void LogCapability(const char* aHeader,
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const webrtc::CaptureCapability &aCapability,
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uint32_t aDistance);
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virtual size_t NumCapabilities();
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virtual void GetCapability(size_t aIndex, webrtc::CaptureCapability& aOut);
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virtual bool ChooseCapability(const dom::MediaTrackConstraints &aConstraints,
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const MediaEnginePrefs &aPrefs,
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const nsString& aDeviceId);
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void SetName(nsString aName);
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void SetUUID(const char* aUUID);
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const nsCString& GetUUID(); // protected access
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// Engine variables.
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// mMonitor protects mImage access/changes, and transitions of mState
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// from kStarted to kStopped (which are combined with EndTrack() and
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// image changes).
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// mMonitor also protects mSources[] access/changes.
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// mSources[] is accessed from webrtc threads.
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// All the mMonitor accesses are from the child classes.
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Monitor mMonitor; // Monitor for processing Camera frames.
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nsTArray<RefPtr<SourceMediaStream>> mSources; // When this goes empty, we shut down HW
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RefPtr<layers::Image> mImage;
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RefPtr<layers::ImageContainer> mImageContainer;
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int mWidth, mHeight; // protected with mMonitor on Gonk due to different threading
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// end of data protected by mMonitor
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bool mInitDone;
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bool mHasDirectListeners;
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int mNrAllocations; // When this becomes 0, we shut down HW
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int mCaptureIndex;
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TrackID mTrackID;
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webrtc::CaptureCapability mCapability;
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nsTArray<webrtc::CaptureCapability> mHardcodedCapabilities; // For OSX & B2G
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private:
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nsString mDeviceName;
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nsCString mUniqueId;
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nsString mFacingMode;
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};
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} // namespace mozilla
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#endif // MediaEngineCameraVideoSource_h
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