fix out of range

src/Session.cpp

@@ -1268,14 +1268,21 @@ bool SESSION::CSession::OnGetStream(int streamid, kodi::addon::InputstreamInfo&
     if (psshSetPos != PSSHSET_POS_DEFAULT ||
         stream->m_adStream.getPeriod()->GetEncryptionState() == EncryptionState::NOT_SUPPORTED)
     {
-      if (!GetSingleSampleDecryptor(psshSetPos))
+      // NOTE "psshSetPos < m_cdmSessions.size()" CONDITION:
+      // is required because the GetNextRepresentation method called by AdaptiveStream "ensure segment" method
+      // can change stream quality that download new manifests, parsing new manifests may add new PSSH's,
+      // so there will be a higher psshSetPos value than m_cdmSessions
+      // this happens for HLS case because the m_cdmSessions is updated with OpenStream.
+      // On DEMUX_SPECIALID_STREAMCHANGE event Kodi query all streams by calling GetStream in advance
+      // than OpenStream so there is a higher psshSetPos value and GetSingleSampleDecryptor cannot get a ptr
+      if (psshSetPos < m_cdmSessions.size() && !GetSingleSampleDecryptor(psshSetPos))
       {
         // If the stream is protected with a unsupported DRM, we have to stop the playback,
         // since there are no ways to stop playback when Kodi request streams
         // we are forced to delete all CStream's here, so that when demux reader will starts
         // will have no data to process, and so stop the playback
         // (other streams may have been requested/opened before this one)
-        LOG::Log(LOGERROR, "GetStream(%d): Decrypter for the stream not found");
+        LOG::Log(LOGERROR, "GetStream(%d): Decrypter for the stream not found", streamid);
         DeleteStreams();
         return false;
       }