Ejemplo n.º 1
0
        private async Task getElementLibraryThumbnailAsync(CitpPeer peer,
                                                           GetElementLibraryThumbnailMessagePacket requestPacket)
        {
            var msexIds = requestPacket.Version == MsexVersion.Version1_0
                                ? requestPacket.LibraryNumbers.Select(n => new MsexId(n)).ToList()
                                : requestPacket.LibraryIds.Select(i => new MsexId(i)).ToList();

            var imageRequest = new CitpImageRequest(requestPacket.ThumbnailWidth, requestPacket.ThumbnailHeight,
                                                    requestPacket.ThumbnailFormat,
                                                    requestPacket.ThumbnailFlags.HasFlag(MsexThumbnailFlags.PreserveAspectRatio),
                                                    requestPacket.ThumbnailFormat == MsexImageFormat.Rgb8 && requestPacket.Version == MsexVersion.Version1_0);

            var thumbs = _device.GetElementLibraryThumbnails(imageRequest, requestPacket.LibraryType, msexIds);

            var packets = thumbs.Select(t => new ElementLibraryThumbnailMessagePacket
            {
                LibraryType     = requestPacket.LibraryType,
                LibraryNumber   = t.Item1.LibraryNumber.GetValueOrDefault(),
                LibraryId       = t.Item1.LibraryId.GetValueOrDefault(),
                ThumbnailFormat = requestPacket.ThumbnailFormat,
                ThumbnailWidth  = (ushort)t.Item2.ActualWidth,
                ThumbnailHeight = (ushort)t.Item2.ActualHeight,
                ThumbnailBuffer = t.Item2.Data,
            });

            foreach (var packet in packets)
            {
                await _networkService.SendPacketAsync(packet, peer, requestPacket).ConfigureAwait(false);
            }
        }
Ejemplo n.º 2
0
        public CitpImage(CitpImageRequest request, [NotNull] byte[] data, int actualWidth, int actualHeight)
        {
            if (data == null)
            {
                throw new ArgumentNullException(nameof(data));
            }

            Request      = request;
            Data         = data;
            ActualWidth  = actualWidth;
            ActualHeight = actualHeight;
        }
Ejemplo n.º 3
0
        private async Task getElementThumbnailAsync(CitpPeer peer, GetElementThumbnailMessagePacket requestPacket)
        {
            MsexId msexId;

            if (requestPacket.Version == MsexVersion.Version1_0)
            {
                msexId = new MsexId(requestPacket.LibraryNumber);
            }
            else
            {
                Debug.Assert(requestPacket.LibraryId.HasValue, "LibraryId must have value for MSEX 1.1 or 1.2");
                msexId = new MsexId(requestPacket.LibraryId.Value);
            }

            var imageRequest = new CitpImageRequest(requestPacket.ThumbnailWidth, requestPacket.ThumbnailHeight,
                                                    requestPacket.ThumbnailFormat,
                                                    requestPacket.ThumbnailFlags.HasFlag(MsexThumbnailFlags.PreserveAspectRatio),
                                                    requestPacket.ThumbnailFormat == MsexImageFormat.Rgb8 && requestPacket.Version == MsexVersion.Version1_0);

            var thumbs = _device.GetElementThumbnails(imageRequest, requestPacket.LibraryType, msexId,
                                                      requestPacket.ElementNumbers);

            var packets = thumbs.Select(t => new ElementThumbnailMessagePacket
            {
                LibraryType     = requestPacket.LibraryType,
                LibraryNumber   = requestPacket.LibraryNumber,
                LibraryId       = requestPacket.LibraryId,
                ElementNumber   = t.Item1,
                ThumbnailFormat = requestPacket.ThumbnailFormat,
                ThumbnailWidth  = (ushort)t.Item2.ActualWidth,
                ThumbnailHeight = (ushort)t.Item2.ActualHeight,
                ThumbnailBuffer = t.Item2.Data
            });

            foreach (var packet in packets)
            {
                await _networkService.SendPacketAsync(packet, peer, requestPacket).ConfigureAwait(false);
            }
        }
Ejemplo n.º 4
0
        public async Task ProcessStreamRequestsAsync()
        {
            foreach (var request in _streamRequests.Values.ToList())
            {
                foreach (var formatRequest in request.Formats)
                {
                    if (Math.Abs(request.Fps) < float.Epsilon ||
                        DateTime.Now < formatRequest.LastOutput + TimeSpan.FromSeconds(1.0f / request.Fps))
                    {
                        break;
                    }

                    var imageRequest = new CitpImageRequest(request.FrameWidth, request.FrameHeight, formatRequest.FrameFormat, true,
                                                            formatRequest.FrameFormat == MsexImageFormat.Rgb8 && formatRequest.Version == MsexVersion.Version1_0);

                    var frame = _streamProvider.GetVideoSourceFrame(request.SourceIdentifier, imageRequest);

                    if (frame == null)
                    {
                        break;
                    }

                    var packet = new StreamFrameMessagePacket
                    {
                        Version          = formatRequest.Version,
                        MediaServerUuid  = _streamProvider.Uuid,
                        SourceIdentifier = Convert.ToUInt16(request.SourceIdentifier),
                        FrameFormat      = formatRequest.FrameFormat,
                        FrameWidth       = Convert.ToUInt16(frame.ActualWidth),
                        FrameHeight      = Convert.ToUInt16(frame.ActualHeight)
                    };


                    if (formatRequest.FrameFormat == MsexImageFormat.FragmentedJpeg ||
                        formatRequest.FrameFormat == MsexImageFormat.FragmentedPng)
                    {
                        var fragments = frame.Data.Split(MaximumImageBufferSize);

                        packet.FragmentInfo = new StreamFrameMessagePacket.FragmentPreamble()
                        {
                            FrameIndex    = request.FrameCounter,
                            FragmentCount = (ushort)fragments.Length
                        };

                        if (fragments.Length > ushort.MaxValue)
                        {
                            _log.LogWarning("Cannot send streaming frame, too many image fragments");
                            return;
                        }

                        for (uint i = 0; i < fragments.Length; ++i)
                        {
                            packet.FragmentInfo.FragmentIndex      = (ushort)i;
                            packet.FragmentInfo.FragmentByteOffset = MaximumImageBufferSize * i;
                            packet.FrameBuffer = fragments[i];
                            await _networkService.SendMulticastPacketAsync(packet).ConfigureAwait(false);
                        }
                    }
                    else
                    {
                        if (frame.Data.Length > MaximumImageBufferSize)
                        {
                            _log.LogWarning($"Cannot send streaming frame request '{imageRequest}', image buffer too large");
                            return;
                        }

                        packet.FrameBuffer = frame.Data;
                        await _networkService.SendMulticastPacketAsync(packet).ConfigureAwait(false);
                    }

                    formatRequest.LastOutput = DateTime.Now;
                }

                request.RemoveTimedOutRequests();

                if (request.Formats.Count == 0)
                {
                    _streamRequests.Remove(request.SourceIdentifier);
                }

                ++request.FrameCounter;
            }
        }