1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webrtc/MediaTrackConstraints.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,93 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +// This file should not be included by other includes, as it contains code
1.9 +
1.10 +#ifndef MEDIATRACKCONSTRAINTS_H_
1.11 +#define MEDIATRACKCONSTRAINTS_H_
1.12 +
1.13 +#include "mozilla/dom/MediaStreamTrackBinding.h"
1.14 +
1.15 +namespace mozilla {
1.16 +
1.17 +// Normalized internal version of MediaTrackConstraints to simplify downstream
1.18 +// processing. This implementation-only helper is included as needed by both
1.19 +// MediaManager (for gUM camera selection) and MediaEngine (for applyConstraints).
1.20 +
1.21 +template<typename T>
1.22 +class MediaTrackConstraintsN : public dom::MediaTrackConstraints
1.23 +{
1.24 +public:
1.25 + typedef T Kind;
1.26 + dom::Sequence<Kind> mRequireN;
1.27 + bool mUnsupportedRequirement;
1.28 + MediaTrackConstraintSet mRequired;
1.29 + dom::Sequence<MediaTrackConstraintSet> mNonrequired;
1.30 +
1.31 + MediaTrackConstraintsN(const dom::MediaTrackConstraints &aOther,
1.32 + const dom::EnumEntry* aStrings)
1.33 + : dom::MediaTrackConstraints(aOther)
1.34 + , mUnsupportedRequirement(false)
1.35 + , mStrings(aStrings)
1.36 + {
1.37 + if (mRequire.WasPassed()) {
1.38 + auto& array = mRequire.Value();
1.39 + for (uint32_t i = 0; i < array.Length(); i++) {
1.40 + auto value = ToEnum(array[i]);
1.41 + if (value != Kind::Other) {
1.42 + mRequireN.AppendElement(value);
1.43 + } else {
1.44 + mUnsupportedRequirement = true;
1.45 + }
1.46 + }
1.47 + }
1.48 + }
1.49 +protected:
1.50 + MediaTrackConstraintSet& Triage(const Kind kind) {
1.51 + if (mRequireN.IndexOf(kind) != mRequireN.NoIndex) {
1.52 + return mRequired;
1.53 + } else {
1.54 + mNonrequired.AppendElement(MediaTrackConstraintSet());
1.55 + return mNonrequired[mNonrequired.Length()-1];
1.56 + }
1.57 + }
1.58 +private:
1.59 + Kind ToEnum(const nsAString& aSrc) {
1.60 + for (size_t i = 0; mStrings[i].value; i++) {
1.61 + if (aSrc.EqualsASCII(mStrings[i].value)) {
1.62 + return Kind(i);
1.63 + }
1.64 + }
1.65 + return Kind::Other;
1.66 + }
1.67 + const dom::EnumEntry* mStrings;
1.68 +};
1.69 +
1.70 +struct AudioTrackConstraintsN :
1.71 + public MediaTrackConstraintsN<dom::SupportedAudioConstraints>
1.72 +{
1.73 + AudioTrackConstraintsN(const dom::MediaTrackConstraints &aOther)
1.74 + : MediaTrackConstraintsN<dom::SupportedAudioConstraints>(aOther, // B2G ICS compiler bug
1.75 + dom::SupportedAudioConstraintsValues::strings) {}
1.76 +};
1.77 +
1.78 +struct VideoTrackConstraintsN :
1.79 + public MediaTrackConstraintsN<dom::SupportedVideoConstraints>
1.80 +{
1.81 + VideoTrackConstraintsN(const dom::MediaTrackConstraints &aOther)
1.82 + : MediaTrackConstraintsN<dom::SupportedVideoConstraints>(aOther,
1.83 + dom::SupportedVideoConstraintsValues::strings) {
1.84 + if (mFacingMode.WasPassed()) {
1.85 + Triage(Kind::FacingMode).mFacingMode.Construct(mFacingMode.Value());
1.86 + }
1.87 + // Reminder: add handling for new constraints both here & SatisfyConstraintSet
1.88 + Triage(Kind::Width).mWidth = mWidth;
1.89 + Triage(Kind::Height).mHeight = mHeight;
1.90 + Triage(Kind::FrameRate).mFrameRate = mFrameRate;
1.91 + }
1.92 +};
1.93 +
1.94 +}
1.95 +
1.96 +#endif /* MEDIATRACKCONSTRAINTS_H_ */
