package eu.siacs.conversations.xmpp.jingle; import com.google.common.base.Strings; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.Map; import eu.siacs.conversations.entities.Contact; import eu.siacs.conversations.entities.Presence; import eu.siacs.conversations.entities.Presences; import eu.siacs.conversations.entities.ServiceDiscoveryResult; import eu.siacs.conversations.xml.Namespace; public class RtpCapability { private static final List BASIC_RTP_REQUIREMENTS = Arrays.asList( Namespace.JINGLE, Namespace.JINGLE_TRANSPORT_ICE_UDP, Namespace.JINGLE_APPS_RTP, Namespace.JINGLE_APPS_DTLS ); private static final List VIDEO_REQUIREMENTS = Arrays.asList( Namespace.JINGLE_FEATURE_AUDIO, Namespace.JINGLE_FEATURE_VIDEO ); public static Capability check(final Presence presence) { final ServiceDiscoveryResult disco = presence.getServiceDiscoveryResult(); final List features = disco == null ? Collections.emptyList() : disco.getFeatures(); if (features.containsAll(BASIC_RTP_REQUIREMENTS)) { if (features.containsAll(VIDEO_REQUIREMENTS)) { return Capability.VIDEO; } if (features.contains(Namespace.JINGLE_FEATURE_AUDIO)) { return Capability.AUDIO; } } return Capability.NONE; } public static String[] filterPresences(final Contact contact, Capability required) { final Presences presences = contact.getPresences(); final ArrayList resources = new ArrayList<>(); for (final Map.Entry presence : presences.getPresencesMap().entrySet()) { final Capability capability = check(presence.getValue()); if (capability == Capability.NONE) { continue; } if (required == Capability.AUDIO || capability == required) { resources.add(presence.getKey()); } } return resources.toArray(new String[0]); } public static Capability check(final Contact contact) { return check(contact, true); } public static Capability check(final Contact contact, final boolean allowFallback) { final Presences presences = contact.getPresences(); if (presences.size() == 0 && allowFallback) { return contact.getRtpCapability(); } Capability result = Capability.NONE; for (final Presence presence : presences.getPresences()) { Capability capability = check(presence); if (capability == Capability.VIDEO) { result = capability; } else if (capability == Capability.AUDIO && result == Capability.NONE) { result = capability; } } return result; } public enum Capability { NONE, AUDIO, VIDEO; public static Capability of(String value) { if (Strings.isNullOrEmpty(value)) { return NONE; } try { return valueOf(value); } catch (IllegalArgumentException e) { return NONE; } } } }