зеркало из https://github.com/mozilla/gecko-dev.git
118 строки
4.0 KiB
C++
118 строки
4.0 KiB
C++
/* 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/. */
|
|
|
|
// This file should not be included by other includes, as it contains code
|
|
|
|
#ifndef MEDIATRACKCONSTRAINTS_H_
|
|
#define MEDIATRACKCONSTRAINTS_H_
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "mozilla/dom/MediaStreamTrackBinding.h"
|
|
|
|
namespace mozilla {
|
|
|
|
// Normalized internal version of MediaTrackConstraints to simplify downstream
|
|
// processing. This implementation-only helper is included as needed by both
|
|
// MediaManager (for gUM camera selection) and MediaEngine (for applyConstraints).
|
|
|
|
template<typename T>
|
|
class MediaTrackConstraintsN : public dom::MediaTrackConstraints
|
|
{
|
|
public:
|
|
typedef T Kind;
|
|
dom::Sequence<Kind> mRequireN;
|
|
bool mUnsupportedRequirement;
|
|
MediaTrackConstraintSet mRequired;
|
|
dom::Sequence<MediaTrackConstraintSet> mNonrequired;
|
|
|
|
MediaTrackConstraintsN(const dom::MediaTrackConstraints &aOther,
|
|
const dom::EnumEntry* aStrings)
|
|
: dom::MediaTrackConstraints(aOther)
|
|
, mUnsupportedRequirement(false)
|
|
, mStrings(aStrings)
|
|
{
|
|
if (mRequire.WasPassed()) {
|
|
auto& array = mRequire.Value();
|
|
for (uint32_t i = 0; i < array.Length(); i++) {
|
|
auto value = ToEnum(array[i]);
|
|
if (value != Kind::Other) {
|
|
mRequireN.AppendElement(value);
|
|
} else {
|
|
mUnsupportedRequirement = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// treat MediaSource special because it's always required
|
|
mRequired.mMediaSource = mMediaSource;
|
|
|
|
// we guarantee (int) equivalence from MediaSourceEnum ->MediaSourceType
|
|
// (but not the other way)
|
|
if (mMediaSource != dom::MediaSourceEnum::Camera && mAdvanced.WasPassed()) {
|
|
// iterate through advanced, forcing mediaSource to match "root"
|
|
auto& array = mAdvanced.Value();
|
|
for (uint32_t i = 0; i < array.Length(); i++) {
|
|
if (array[i].mMediaSource == dom::MediaSourceEnum::Camera) {
|
|
array[i].mMediaSource = mMediaSource;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
protected:
|
|
MediaTrackConstraintSet& Triage(const Kind kind) {
|
|
if (mRequireN.IndexOf(kind) != mRequireN.NoIndex) {
|
|
return mRequired;
|
|
} else {
|
|
mNonrequired.AppendElement(MediaTrackConstraintSet());
|
|
return mNonrequired[mNonrequired.Length()-1];
|
|
}
|
|
}
|
|
private:
|
|
Kind ToEnum(const nsAString& aSrc) {
|
|
for (size_t i = 0; mStrings[i].value; i++) {
|
|
if (aSrc.EqualsASCII(mStrings[i].value)) {
|
|
return Kind(i);
|
|
}
|
|
}
|
|
return Kind::Other;
|
|
}
|
|
const dom::EnumEntry* mStrings;
|
|
};
|
|
|
|
struct AudioTrackConstraintsN :
|
|
public MediaTrackConstraintsN<dom::SupportedAudioConstraints>
|
|
{
|
|
MOZ_IMPLICIT AudioTrackConstraintsN(const dom::MediaTrackConstraints &aOther)
|
|
: MediaTrackConstraintsN<dom::SupportedAudioConstraints>(aOther, // B2G ICS compiler bug
|
|
dom::SupportedAudioConstraintsValues::strings) {}
|
|
};
|
|
|
|
struct VideoTrackConstraintsN :
|
|
public MediaTrackConstraintsN<dom::SupportedVideoConstraints>
|
|
{
|
|
MOZ_IMPLICIT VideoTrackConstraintsN(const dom::MediaTrackConstraints &aOther)
|
|
: MediaTrackConstraintsN<dom::SupportedVideoConstraints>(aOther,
|
|
dom::SupportedVideoConstraintsValues::strings) {
|
|
if (mFacingMode.WasPassed()) {
|
|
Triage(Kind::FacingMode).mFacingMode.Construct(mFacingMode.Value());
|
|
}
|
|
// Reminder: add handling for new constraints both here & SatisfyConstraintSet
|
|
Triage(Kind::Width).mWidth = mWidth;
|
|
Triage(Kind::Height).mHeight = mHeight;
|
|
Triage(Kind::FrameRate).mFrameRate = mFrameRate;
|
|
if (mBrowserWindow.WasPassed()) {
|
|
Triage(Kind::BrowserWindow).mBrowserWindow.Construct(mBrowserWindow.Value());
|
|
}
|
|
if (mScrollWithPage.WasPassed()) {
|
|
Triage(Kind::ScrollWithPage).mScrollWithPage.Construct(mScrollWithPage.Value());
|
|
}
|
|
// treat MediaSource special because it's always required
|
|
mRequired.mMediaSource = mMediaSource;
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
#endif /* MEDIATRACKCONSTRAINTS_H_ */
|