Source/WebCore/bindings/js/JSMediaStreamTrackCustom.cpp

/*
 * Copyright (C) 2015-2016 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "JSMediaStreamTrack.h"

#if ENABLE(MEDIA_STREAM)

#include "Dictionary.h"
#include "ExceptionCode.h"
#include "JSDOMBinding.h"
#include "JSMediaDevicesCustom.h"
#include "MediaConstraintsImpl.h"
#include "MediaSourceSettings.h"
#include "MediaStreamTrack.h"
#include "WebCoreJSClientData.h"
#include <runtime/JSObject.h>
#include <runtime/ObjectConstructor.h>

using namespace JSC;

namespace WebCore {

JSC::JSValue JSMediaStreamTrack::getSettings(ExecState& state)
{
    VM& vm = state.vm();
    auto scope = DECLARE_THROW_SCOPE(vm);

    JSValue thisValue = state.thisValue();
    JSMediaStreamTrack* castedThis = jsDynamicCast<JSMediaStreamTrack*>(thisValue);
    if (UNLIKELY(!castedThis))
        return JSValue::decode(throwThisTypeError(state, scope, "MediaStreamTrack", "getSettings"));

    JSObject* object = constructEmptyObject(&state);
    auto& impl = castedThis->wrapped();
    RefPtr<MediaSourceSettings> settings = WTF::getPtr(impl.getSettings());

    if (settings->supportsWidth())
        object->putDirect(state.vm(), Identifier::fromString(&state, "width"), jsNumber(settings->width()), DontDelete | ReadOnly);
    if (settings->supportsHeight())
        object->putDirect(state.vm(), Identifier::fromString(&state, "height"), jsNumber(settings->height()), DontDelete | ReadOnly);
    if (settings->supportsAspectRatio() && settings->aspectRatio())
        object->putDirect(state.vm(), Identifier::fromString(&state, "aspectRatio"), jsDoubleNumber(settings->aspectRatio()), DontDelete | ReadOnly);
    if (settings->supportsFrameRate())
        object->putDirect(state.vm(), Identifier::fromString(&state, "frameRate"), jsDoubleNumber(settings->frameRate()), DontDelete | ReadOnly);
    if (settings->supportsFacingMode())
        object->putDirect(state.vm(), Identifier::fromString(&state, "facingMode"), jsStringWithCache(&state, settings->facingMode()), DontDelete | ReadOnly);
    if (settings->supportsVolume())
        object->putDirect(state.vm(), Identifier::fromString(&state, "volume"), jsDoubleNumber(settings->volume()), DontDelete | ReadOnly);
    if (settings->supportsSampleRate())
        object->putDirect(state.vm(), Identifier::fromString(&state, "sampleRate"), jsNumber(settings->sampleRate()), DontDelete | ReadOnly);
    if (settings->supportsSampleSize())
        object->putDirect(state.vm(), Identifier::fromString(&state, "sampleSize"), jsNumber(settings->sampleSize()), DontDelete | ReadOnly);
    if (settings->supportsEchoCancellation())
        object->putDirect(state.vm(), Identifier::fromString(&state, "echoCancellation"), jsBoolean(settings->echoCancellation()), DontDelete | ReadOnly);
    if (settings->supportsDeviceId())
        object->putDirect(state.vm(), Identifier::fromString(&state, "deviceId"), jsStringWithCache(&state, settings->deviceId()), DontDelete | ReadOnly);
    if (settings->supportsGroupId())
        object->putDirect(state.vm(), Identifier::fromString(&state, "groupId"), jsStringWithCache(&state, settings->groupId()), DontDelete | ReadOnly);
    
    return object;
}

static JSValue capabilityValue(const CapabilityValueOrRange& value, ExecState& state)
{
    if (value.type() == CapabilityValueOrRange::DoubleRange || value.type() == CapabilityValueOrRange::ULongRange) {
        JSObject* object = constructEmptyObject(&state);

        CapabilityValueOrRange::ValueUnion min = value.rangeMin();
        CapabilityValueOrRange::ValueUnion max = value.rangeMax();
        if (value.type() == CapabilityValueOrRange::DoubleRange) {
            object->putDirect(state.vm(), Identifier::fromString(&state, "min"), jsNumber(min.asDouble));
            object->putDirect(state.vm(), Identifier::fromString(&state, "max"), jsNumber(max.asDouble));
        } else {
            object->putDirect(state.vm(), Identifier::fromString(&state, "min"), jsNumber(min.asInt));
            object->putDirect(state.vm(), Identifier::fromString(&state, "max"), jsNumber(max.asInt));
        }

        return object;
    }

    if (value.type() == CapabilityValueOrRange::Double)
        return jsNumber(value.value().asDouble);

    return jsNumber(value.value().asInt);
}

JSC::JSValue JSMediaStreamTrack::getCapabilities(ExecState& state)
{
    VM& vm = state.vm();
    auto scope = DECLARE_THROW_SCOPE(vm);

    JSValue thisValue = state.thisValue();
    JSMediaStreamTrack* castedThis = jsDynamicCast<JSMediaStreamTrack*>(thisValue);
    if (UNLIKELY(!castedThis))
        return JSValue::decode(throwThisTypeError(state, scope, "MediaStreamTrack", "getSettings"));

    JSObject* object = constructEmptyObject(&state);
    auto& impl = castedThis->wrapped();
    RefPtr<RealtimeMediaSourceCapabilities> capabilities = WTF::getPtr(impl.getCapabilities());

    if (capabilities->supportsWidth())
        object->putDirect(state.vm(), Identifier::fromString(&state, "width"), capabilityValue(capabilities->width(), state), DontDelete | ReadOnly);
    if (capabilities->supportsHeight())
        object->putDirect(state.vm(), Identifier::fromString(&state, "height"), capabilityValue(capabilities->height(), state), DontDelete | ReadOnly);
    if (capabilities->supportsAspectRatio())
        object->putDirect(state.vm(), Identifier::fromString(&state, "aspectRatio"), capabilityValue(capabilities->aspectRatio(), state), DontDelete | ReadOnly);
    if (capabilities->supportsFrameRate())
        object->putDirect(state.vm(), Identifier::fromString(&state, "frameRate"), capabilityValue(capabilities->frameRate(), state), DontDelete | ReadOnly);
    if (capabilities->supportsFacingMode()) {
        const Vector<RealtimeMediaSourceSettings::VideoFacingMode>& modes = capabilities->facingMode();
        Vector<String> facingModes;
        if (modes.size()) {

            facingModes.reserveCapacity(modes.size());

            for (auto& mode : modes)
                facingModes.append(RealtimeMediaSourceSettings::facingMode(mode));
        }

        object->putDirect(state.vm(), Identifier::fromString(&state, "facingMode"), toJS<IDLSequence<IDLDOMString>>(state, *castedThis->globalObject(), facingModes), DontDelete | ReadOnly);
    }
    if (capabilities->supportsVolume())
        object->putDirect(state.vm(), Identifier::fromString(&state, "volume"), capabilityValue(capabilities->volume(), state), DontDelete | ReadOnly);
    if (capabilities->supportsSampleRate())
        object->putDirect(state.vm(), Identifier::fromString(&state, "sampleRate"), capabilityValue(capabilities->sampleRate(), state), DontDelete | ReadOnly);
    if (capabilities->supportsSampleSize())
        object->putDirect(state.vm(), Identifier::fromString(&state, "sampleSize"), capabilityValue(capabilities->sampleSize(), state), DontDelete | ReadOnly);
    if (capabilities->supportsEchoCancellation()) {
        Vector<String> cancellation;
        cancellation.reserveInitialCapacity(2);

        cancellation.uncheckedAppend("true");
        cancellation.uncheckedAppend(capabilities->echoCancellation() == RealtimeMediaSourceCapabilities::EchoCancellation::ReadWrite ? "true" : "false");

        object->putDirect(state.vm(), Identifier::fromString(&state, "echoCancellation"), toJS<IDLSequence<IDLDOMString>>(state, *castedThis->globalObject(), cancellation), DontDelete | ReadOnly);
    }
    if (capabilities->supportsDeviceId())
        object->putDirect(state.vm(), Identifier::fromString(&state, "deviceId"), jsStringWithCache(&state, capabilities->deviceId()), DontDelete | ReadOnly);
    if (capabilities->supportsGroupId())
        object->putDirect(state.vm(), Identifier::fromString(&state, "groupId"), jsStringWithCache(&state, capabilities->groupId()), DontDelete | ReadOnly);
    

    return object;
}

JSValue JSMediaStreamTrack::applyConstraints(ExecState& state)
{
    MediaTrackConstraintSetMap mandatoryConstraints;
    Vector<MediaTrackConstraintSetMap> advancedConstraints;
    bool valid = false;

    if (state.argumentCount() >= 1) {
        JSValue argument = state.uncheckedArgument(0);

        JSVMClientData& clientData = *static_cast<JSVMClientData*>(state.vm().clientData);
        putDirect(state.vm(), clientData.builtinNames().mediaStreamTrackConstraintsPrivateName(), argument, DontEnum);

        auto constraintsDictionary = Dictionary(&state, argument);
        if (!constraintsDictionary.isUndefinedOrNull())
            parseMediaConstraintsDictionary(constraintsDictionary, mandatoryConstraints, advancedConstraints);
        valid = !advancedConstraints.isEmpty() || !mandatoryConstraints.isEmpty();
    }

    auto deferredPromise = createDeferredPromise(state, domWindow());
    auto promise = deferredPromise->promise();

    auto constraints = MediaConstraintsImpl::create(WTFMove(mandatoryConstraints), WTFMove(advancedConstraints), valid);
    wrapped().applyConstraints(WTFMove(constraints), WTFMove(deferredPromise));

    return promise;
}

JSValue JSMediaStreamTrack::getConstraints(ExecState& state)
{
    JSVMClientData& clientData = *static_cast<JSVMClientData*>(state.vm().clientData);
    JSValue result = getDirect(state.vm(), clientData.builtinNames().mediaStreamTrackConstraintsPrivateName());
    return !result.isEmpty() ? result : jsUndefined();
}

} // namespace WebCore

#endif