#include "config.h"
#include "MediaDevices.h"
#if ENABLE(MEDIA_STREAM)
#include "Document.h"
#include "Event.h"
#include "EventNames.h"
#include "MediaDevicesRequest.h"
#include "MediaTrackSupportedConstraints.h"
#include "UserMediaRequest.h"
#include <wtf/RandomNumber.h>
namespace WebCore {
inline MediaDevices::MediaDevices(Document& document)
: ContextDestructionObserver(&document)
, m_scheduledEventTimer(*this, &MediaDevices::scheduledEventTimerFired)
, m_weakPtrFactory(this)
{
m_deviceChangedToken = RealtimeMediaSourceCenter::singleton().addDevicesChangedObserver([weakThis = createWeakPtr(), this]() {
if (!weakThis)
return;
if (!m_scheduledEventTimer.isActive())
m_scheduledEventTimer.startOneShot(Seconds(randomNumber() / 2));
});
}
MediaDevices::~MediaDevices()
{
if (m_deviceChangedToken)
RealtimeMediaSourceCenter::singleton().removeDevicesChangedObserver(m_deviceChangedToken.value());
}
Ref<MediaDevices> MediaDevices::create(Document& document)
{
return adoptRef(*new MediaDevices(document));
}
Document* MediaDevices::document() const
{
return downcast<Document>(scriptExecutionContext());
}
static MediaConstraints createMediaConstraints(const Variant<bool, MediaTrackConstraints>& constraints)
{
return WTF::switchOn(constraints,
[&] (bool isValid) {
MediaConstraints constraints;
constraints.isValid = isValid;
return constraints;
},
[&] (const MediaTrackConstraints& trackConstraints) {
return createMediaConstraints(trackConstraints);
}
);
}
ExceptionOr<void> MediaDevices::getUserMedia(const StreamConstraints& constraints, Promise&& promise) const
{
auto* document = this->document();
if (!document)
return Exception { INVALID_STATE_ERR };
auto audioConstraints = createMediaConstraints(constraints.audio);
auto videoConstraints = createMediaConstraints(constraints.video);
if (videoConstraints.isValid)
videoConstraints.setDefaultVideoConstraints();
return UserMediaRequest::start(*document, WTFMove(audioConstraints), WTFMove(videoConstraints), WTFMove(promise));
}
void MediaDevices::enumerateDevices(EnumerateDevicesPromise&& promise) const
{
auto* document = this->document();
if (!document)
return;
MediaDevicesRequest::create(*document, WTFMove(promise))->start();
}
MediaTrackSupportedConstraints MediaDevices::getSupportedConstraints()
{
auto& supported = RealtimeMediaSourceCenter::singleton().supportedConstraints();
MediaTrackSupportedConstraints result;
result.width = supported.supportsWidth();
result.height = supported.supportsHeight();
result.aspectRatio = supported.supportsAspectRatio();
result.frameRate = supported.supportsFrameRate();
result.facingMode = supported.supportsFacingMode();
result.volume = supported.supportsVolume();
result.sampleRate = supported.supportsSampleRate();
result.sampleSize = supported.supportsSampleSize();
result.echoCancellation = supported.supportsEchoCancellation();
result.deviceId = supported.supportsDeviceId();
result.groupId = supported.supportsGroupId();
return result;
}
void MediaDevices::scheduledEventTimerFired()
{
dispatchEvent(Event::create(eventNames().devicechangeEvent, false, false));
}
}
#endif // ENABLE(MEDIA_STREAM)