michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: // This file should not be included by other includes, as it contains code
michael@0: 
michael@0: #ifndef MEDIATRACKCONSTRAINTS_H_
michael@0: #define MEDIATRACKCONSTRAINTS_H_
michael@0: 
michael@0: #include "mozilla/dom/MediaStreamTrackBinding.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: // Normalized internal version of MediaTrackConstraints to simplify downstream
michael@0: // processing. This implementation-only helper is included as needed by both
michael@0: // MediaManager (for gUM camera selection) and MediaEngine (for applyConstraints).
michael@0: 
michael@0: template<typename T>
michael@0: class MediaTrackConstraintsN : public dom::MediaTrackConstraints
michael@0: {
michael@0: public:
michael@0:   typedef T Kind;
michael@0:   dom::Sequence<Kind> mRequireN;
michael@0:   bool mUnsupportedRequirement;
michael@0:   MediaTrackConstraintSet mRequired;
michael@0:   dom::Sequence<MediaTrackConstraintSet> mNonrequired;
michael@0: 
michael@0:   MediaTrackConstraintsN(const dom::MediaTrackConstraints &aOther,
michael@0:                          const dom::EnumEntry* aStrings)
michael@0:   : dom::MediaTrackConstraints(aOther)
michael@0:   , mUnsupportedRequirement(false)
michael@0:   , mStrings(aStrings)
michael@0:   {
michael@0:     if (mRequire.WasPassed()) {
michael@0:       auto& array = mRequire.Value();
michael@0:       for (uint32_t i = 0; i < array.Length(); i++) {
michael@0:         auto value = ToEnum(array[i]);
michael@0:         if (value != Kind::Other) {
michael@0:           mRequireN.AppendElement(value);
michael@0:         } else {
michael@0:           mUnsupportedRequirement = true;
michael@0:         }
michael@0:       }
michael@0:     }
michael@0:   }
michael@0: protected:
michael@0:   MediaTrackConstraintSet& Triage(const Kind kind) {
michael@0:     if (mRequireN.IndexOf(kind) != mRequireN.NoIndex) {
michael@0:       return mRequired;
michael@0:     } else {
michael@0:       mNonrequired.AppendElement(MediaTrackConstraintSet());
michael@0:       return mNonrequired[mNonrequired.Length()-1];
michael@0:     }
michael@0:   }
michael@0: private:
michael@0:   Kind ToEnum(const nsAString& aSrc) {
michael@0:     for (size_t i = 0; mStrings[i].value; i++) {
michael@0:       if (aSrc.EqualsASCII(mStrings[i].value)) {
michael@0:         return Kind(i);
michael@0:       }
michael@0:     }
michael@0:     return Kind::Other;
michael@0:   }
michael@0:   const dom::EnumEntry* mStrings;
michael@0: };
michael@0: 
michael@0: struct AudioTrackConstraintsN :
michael@0:   public MediaTrackConstraintsN<dom::SupportedAudioConstraints>
michael@0: {
michael@0:   AudioTrackConstraintsN(const dom::MediaTrackConstraints &aOther)
michael@0:   : MediaTrackConstraintsN<dom::SupportedAudioConstraints>(aOther, // B2G ICS compiler bug
michael@0:                            dom::SupportedAudioConstraintsValues::strings) {}
michael@0: };
michael@0: 
michael@0: struct VideoTrackConstraintsN :
michael@0:     public MediaTrackConstraintsN<dom::SupportedVideoConstraints>
michael@0: {
michael@0:   VideoTrackConstraintsN(const dom::MediaTrackConstraints &aOther)
michael@0:   : MediaTrackConstraintsN<dom::SupportedVideoConstraints>(aOther,
michael@0:                            dom::SupportedVideoConstraintsValues::strings) {
michael@0:     if (mFacingMode.WasPassed()) {
michael@0:       Triage(Kind::FacingMode).mFacingMode.Construct(mFacingMode.Value());
michael@0:     }
michael@0:     // Reminder: add handling for new constraints both here & SatisfyConstraintSet
michael@0:     Triage(Kind::Width).mWidth = mWidth;
michael@0:     Triage(Kind::Height).mHeight = mHeight;
michael@0:     Triage(Kind::FrameRate).mFrameRate = mFrameRate;
michael@0:   }
michael@0: };
michael@0: 
michael@0: }
michael@0: 
michael@0: #endif /* MEDIATRACKCONSTRAINTS_H_ */