Merge remote-tracking branch 'upstream/master' into split-api

6 files changed, 315 insertions, 57 deletions

diff --git a/MediaBrowser.Model/Dlna/DeviceIdentification.cs b/MediaBrowser.Model/Dlna/DeviceIdentification.cs
index 43407383a8..c511801f4f 100644
--- a/MediaBrowser.Model/Dlna/DeviceIdentification.cs
+++ b/MediaBrowser.Model/Dlna/DeviceIdentification.cs
@@ -11,59 +11,54 @@ namespace MediaBrowser.Model.Dlna
         /// Gets or sets the name of the friendly.
         /// </summary>
         /// <value>The name of the friendly.</value>
-        public string FriendlyName { get; set; }
+        public string FriendlyName { get; set; } = string.Empty;
 
         /// <summary>
         /// Gets or sets the model number.
         /// </summary>
         /// <value>The model number.</value>
-        public string ModelNumber { get; set; }
+        public string ModelNumber { get; set; } = string.Empty;
 
         /// <summary>
         /// Gets or sets the serial number.
         /// </summary>
         /// <value>The serial number.</value>
-        public string SerialNumber { get; set; }
+        public string SerialNumber { get; set; } = string.Empty;
 
         /// <summary>
         /// Gets or sets the name of the model.
         /// </summary>
         /// <value>The name of the model.</value>
-        public string ModelName { get; set; }
+        public string ModelName { get; set; } = string.Empty;
 
         /// <summary>
         /// Gets or sets the model description.
         /// </summary>
         /// <value>The model description.</value>
-        public string ModelDescription { get; set; }
+        public string ModelDescription { get; set; } = string.Empty;
 
         /// <summary>
         /// Gets or sets the model URL.
         /// </summary>
         /// <value>The model URL.</value>
-        public string ModelUrl { get; set; }
+        public string ModelUrl { get; set; } = string.Empty;
 
         /// <summary>
         /// Gets or sets the manufacturer.
         /// </summary>
         /// <value>The manufacturer.</value>
-        public string Manufacturer { get; set; }
+        public string Manufacturer { get; set; } = string.Empty;
 
         /// <summary>
         /// Gets or sets the manufacturer URL.
         /// </summary>
         /// <value>The manufacturer URL.</value>
-        public string ManufacturerUrl { get; set; }
+        public string ManufacturerUrl { get; set; } = string.Empty;
 
         /// <summary>
         /// Gets or sets the headers.
         /// </summary>
         /// <value>The headers.</value>
-        public HttpHeaderInfo[] Headers { get; set; }
-
-        public DeviceIdentification()
-        {
-            Headers = Array.Empty<HttpHeaderInfo>();
-        }
+        public HttpHeaderInfo[] Headers { get; set; } = Array.Empty<HttpHeaderInfo>();
     }
 }
diff --git a/MediaBrowser.Model/Dlna/DeviceProfile.cs b/MediaBrowser.Model/Dlna/DeviceProfile.cs
index e842efead9..ff51866587 100644
--- a/MediaBrowser.Model/Dlna/DeviceProfile.cs
+++ b/MediaBrowser.Model/Dlna/DeviceProfile.cs
@@ -1,6 +1,5 @@
 #nullable disable
-#pragma warning disable CS1591
-
+#pragma warning disable CA1819 // Properties should not return arrays
 using System;
 using System.Linq;
 using System.Xml.Serialization;
@@ -8,129 +7,243 @@ using MediaBrowser.Model.MediaInfo;
 
 namespace MediaBrowser.Model.Dlna
 {
+    /// <summary>
+    /// Defines the <see cref="DeviceProfile" />.
+    /// </summary>
     [XmlRoot("Profile")]
     public class DeviceProfile
     {
         /// <summary>
-        /// Gets or sets the name.
+        /// Initializes a new instance of the <see cref="DeviceProfile"/> class.
+        /// </summary>
+        public DeviceProfile()
+        {
+            DirectPlayProfiles = Array.Empty<DirectPlayProfile>();
+            TranscodingProfiles = Array.Empty<TranscodingProfile>();
+            ResponseProfiles = Array.Empty<ResponseProfile>();
+            CodecProfiles = Array.Empty<CodecProfile>();
+            ContainerProfiles = Array.Empty<ContainerProfile>();
+            SubtitleProfiles = Array.Empty<SubtitleProfile>();
+
+            XmlRootAttributes = Array.Empty<XmlAttribute>();
+
+            SupportedMediaTypes = "Audio,Photo,Video";
+            MaxStreamingBitrate = 8000000;
+            MaxStaticBitrate = 8000000;
+            MusicStreamingTranscodingBitrate = 128000;
+        }
+
+        /// <summary>
+        /// Gets or sets the Name.
         /// </summary>
-        /// <value>The name.</value>
         public string Name { get; set; }
 
+        /// <summary>
+        /// Gets or sets the Id.
+        /// </summary>
         [XmlIgnore]
         public string Id { get; set; }
 
         /// <summary>
-        /// Gets or sets the identification.
+        /// Gets or sets the Identification.
         /// </summary>
-        /// <value>The identification.</value>
         public DeviceIdentification Identification { get; set; }
 
+        /// <summary>
+        /// Gets or sets the FriendlyName.
+        /// </summary>
         public string FriendlyName { get; set; }
 
+        /// <summary>
+        /// Gets or sets the Manufacturer.
+        /// </summary>
         public string Manufacturer { get; set; }
 
+        /// <summary>
+        /// Gets or sets the ManufacturerUrl.
+        /// </summary>
         public string ManufacturerUrl { get; set; }
 
+        /// <summary>
+        /// Gets or sets the ModelName.
+        /// </summary>
         public string ModelName { get; set; }
 
+        /// <summary>
+        /// Gets or sets the ModelDescription.
+        /// </summary>
         public string ModelDescription { get; set; }
 
+        /// <summary>
+        /// Gets or sets the ModelNumber.
+        /// </summary>
         public string ModelNumber { get; set; }
 
+        /// <summary>
+        /// Gets or sets the ModelUrl.
+        /// </summary>
         public string ModelUrl { get; set; }
 
+        /// <summary>
+        /// Gets or sets the SerialNumber.
+        /// </summary>
         public string SerialNumber { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether EnableAlbumArtInDidl.
+        /// </summary>
         public bool EnableAlbumArtInDidl { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether EnableSingleAlbumArtLimit.
+        /// </summary>
         public bool EnableSingleAlbumArtLimit { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether EnableSingleSubtitleLimit.
+        /// </summary>
         public bool EnableSingleSubtitleLimit { get; set; }
 
+        /// <summary>
+        /// Gets or sets the SupportedMediaTypes.
+        /// </summary>
         public string SupportedMediaTypes { get; set; }
 
+        /// <summary>
+        /// Gets or sets the UserId.
+        /// </summary>
         public string UserId { get; set; }
 
+        /// <summary>
+        /// Gets or sets the AlbumArtPn.
+        /// </summary>
         public string AlbumArtPn { get; set; }
 
+        /// <summary>
+        /// Gets or sets the MaxAlbumArtWidth.
+        /// </summary>
         public int MaxAlbumArtWidth { get; set; }
 
+        /// <summary>
+        /// Gets or sets the MaxAlbumArtHeight.
+        /// </summary>
         public int MaxAlbumArtHeight { get; set; }
 
+        /// <summary>
+        /// Gets or sets the MaxIconWidth.
+        /// </summary>
         public int? MaxIconWidth { get; set; }
 
+        /// <summary>
+        /// Gets or sets the MaxIconHeight.
+        /// </summary>
         public int? MaxIconHeight { get; set; }
 
+        /// <summary>
+        /// Gets or sets the MaxStreamingBitrate.
+        /// </summary>
         public int? MaxStreamingBitrate { get; set; }
 
+        /// <summary>
+        /// Gets or sets the MaxStaticBitrate.
+        /// </summary>
         public int? MaxStaticBitrate { get; set; }
 
+        /// <summary>
+        /// Gets or sets the MusicStreamingTranscodingBitrate.
+        /// </summary>
         public int? MusicStreamingTranscodingBitrate { get; set; }
 
+        /// <summary>
+        /// Gets or sets the MaxStaticMusicBitrate.
+        /// </summary>
         public int? MaxStaticMusicBitrate { get; set; }
 
         /// <summary>
-        /// Controls the content of the aggregationFlags element in the urn:schemas-sonycom:av namespace.
+        /// Gets or sets the content of the aggregationFlags element in the urn:schemas-sonycom:av namespace.
         /// </summary>
         public string SonyAggregationFlags { get; set; }
 
+        /// <summary>
+        /// Gets or sets the ProtocolInfo.
+        /// </summary>
         public string ProtocolInfo { get; set; }
 
+        /// <summary>
+        /// Gets or sets the TimelineOffsetSeconds.
+        /// </summary>
         public int TimelineOffsetSeconds { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether RequiresPlainVideoItems.
+        /// </summary>
         public bool RequiresPlainVideoItems { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether RequiresPlainFolders.
+        /// </summary>
         public bool RequiresPlainFolders { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether EnableMSMediaReceiverRegistrar.
+        /// </summary>
         public bool EnableMSMediaReceiverRegistrar { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether IgnoreTranscodeByteRangeRequests.
+        /// </summary>
         public bool IgnoreTranscodeByteRangeRequests { get; set; }
 
+        /// <summary>
+        /// Gets or sets the XmlRootAttributes.
+        /// </summary>
         public XmlAttribute[] XmlRootAttributes { get; set; }
 
         /// <summary>
         /// Gets or sets the direct play profiles.
         /// </summary>
-        /// <value>The direct play profiles.</value>
         public DirectPlayProfile[] DirectPlayProfiles { get; set; }
 
         /// <summary>
         /// Gets or sets the transcoding profiles.
         /// </summary>
-        /// <value>The transcoding profiles.</value>
         public TranscodingProfile[] TranscodingProfiles { get; set; }
 
+        /// <summary>
+        /// Gets or sets the ContainerProfiles.
+        /// </summary>
         public ContainerProfile[] ContainerProfiles { get; set; }
 
+        /// <summary>
+        /// Gets or sets the CodecProfiles.
+        /// </summary>
         public CodecProfile[] CodecProfiles { get; set; }
 
+        /// <summary>
+        /// Gets or sets the ResponseProfiles.
+        /// </summary>
         public ResponseProfile[] ResponseProfiles { get; set; }
 
+        /// <summary>
+        /// Gets or sets the SubtitleProfiles.
+        /// </summary>
         public SubtitleProfile[] SubtitleProfiles { get; set; }
 
-        public DeviceProfile()
-        {
-            DirectPlayProfiles = Array.Empty<DirectPlayProfile>();
-            TranscodingProfiles = Array.Empty<TranscodingProfile>();
-            ResponseProfiles = Array.Empty<ResponseProfile>();
-            CodecProfiles = Array.Empty<CodecProfile>();
-            ContainerProfiles = Array.Empty<ContainerProfile>();
-            SubtitleProfiles = Array.Empty<SubtitleProfile>();
-
-            XmlRootAttributes = Array.Empty<XmlAttribute>();
-
-            SupportedMediaTypes = "Audio,Photo,Video";
-            MaxStreamingBitrate = 8000000;
-            MaxStaticBitrate = 8000000;
-            MusicStreamingTranscodingBitrate = 128000;
-        }
-
+        /// <summary>
+        /// The GetSupportedMediaTypes.
+        /// </summary>
+        /// <returns>The .</returns>
         public string[] GetSupportedMediaTypes()
         {
             return ContainerProfile.SplitValue(SupportedMediaTypes);
         }
 
+        /// <summary>
+        /// Gets the audio transcoding profile.
+        /// </summary>
+        /// <param name="container">The container.</param>
+        /// <param name="audioCodec">The audio Codec.</param>
+        /// <returns>A <see cref="TranscodingProfile"/>.</returns>
         public TranscodingProfile GetAudioTranscodingProfile(string container, string audioCodec)
         {
             container = (container ?? string.Empty).TrimStart('.');
@@ -158,6 +271,13 @@ namespace MediaBrowser.Model.Dlna
             return null;
         }
 
+        /// <summary>
+        /// Gets the video transcoding profile.
+        /// </summary>
+        /// <param name="container">The container.</param>
+        /// <param name="audioCodec">The audio Codec.</param>
+        /// <param name="videoCodec">The video Codec.</param>
+        /// <returns>The <see cref="TranscodingProfile"/>.</returns>
         public TranscodingProfile GetVideoTranscodingProfile(string container, string audioCodec, string videoCodec)
         {
             container = (container ?? string.Empty).TrimStart('.');
@@ -190,6 +310,16 @@ namespace MediaBrowser.Model.Dlna
             return null;
         }
 
+        /// <summary>
+        /// Gets the audio media profile.
+        /// </summary>
+        /// <param name="container">The container.</param>
+        /// <param name="audioCodec">The audio codec.</param>
+        /// <param name="audioChannels">The audio channels.</param>
+        /// <param name="audioBitrate">The audio bitrate.</param>
+        /// <param name="audioSampleRate">The audio sample rate.</param>
+        /// <param name="audioBitDepth">The audio bit depth.</param>
+        /// <returns>The <see cref="ResponseProfile"/>.</returns>
         public ResponseProfile GetAudioMediaProfile(string container, string audioCodec, int? audioChannels, int? audioBitrate, int? audioSampleRate, int? audioBitDepth)
         {
             foreach (var i in ResponseProfiles)
@@ -231,6 +361,11 @@ namespace MediaBrowser.Model.Dlna
             return null;
         }
 
+        /// <summary>
+        /// Gets the model profile condition.
+        /// </summary>
+        /// <param name="c">The c<see cref="ProfileCondition"/>.</param>
+        /// <returns>The <see cref="ProfileCondition"/>.</returns>
         private ProfileCondition GetModelProfileCondition(ProfileCondition c)
         {
             return new ProfileCondition
@@ -242,6 +377,13 @@ namespace MediaBrowser.Model.Dlna
             };
         }
 
+        /// <summary>
+        /// Gets the image media profile.
+        /// </summary>
+        /// <param name="container">The container.</param>
+        /// <param name="width">The width.</param>
+        /// <param name="height">The height.</param>
+        /// <returns>The <see cref="ResponseProfile"/>.</returns>
         public ResponseProfile GetImageMediaProfile(string container, int? width, int? height)
         {
             foreach (var i in ResponseProfiles)
@@ -277,6 +419,29 @@ namespace MediaBrowser.Model.Dlna
             return null;
         }
 
+        /// <summary>
+        /// Gets the video media profile.
+        /// </summary>
+        /// <param name="container">The container.</param>
+        /// <param name="audioCodec">The audio codec.</param>
+        /// <param name="videoCodec">The video codec.</param>
+        /// <param name="width">The width.</param>
+        /// <param name="height">The height.</param>
+        /// <param name="bitDepth">The bit depth.</param>
+        /// <param name="videoBitrate">The video bitrate.</param>
+        /// <param name="videoProfile">The video profile.</param>
+        /// <param name="videoLevel">The video level.</param>
+        /// <param name="videoFramerate">The video framerate.</param>
+        /// <param name="packetLength">The packet length.</param>
+        /// <param name="timestamp">The timestamp<see cref="TransportStreamTimestamp"/>.</param>
+        /// <param name="isAnamorphic">True if anamorphic.</param>
+        /// <param name="isInterlaced">True if interlaced.</param>
+        /// <param name="refFrames">The ref frames.</param>
+        /// <param name="numVideoStreams">The number of video streams.</param>
+        /// <param name="numAudioStreams">The number of audio streams.</param>
+        /// <param name="videoCodecTag">The video Codec tag.</param>
+        /// <param name="isAvc">True if Avc.</param>
+        /// <returns>The <see cref="ResponseProfile"/>.</returns>
         public ResponseProfile GetVideoMediaProfile(
             string container,
             string audioCodec,
diff --git a/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs b/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs
index a4305c8104..65fccbdd41 100644
--- a/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs
+++ b/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs
@@ -15,7 +15,7 @@ namespace MediaBrowser.Model.Dlna
                 new ResolutionConfiguration(720, 950000),
                 new ResolutionConfiguration(1280, 2500000),
                 new ResolutionConfiguration(1920, 4000000),
-                new ResolutionConfiguration(2560, 8000000),
+                new ResolutionConfiguration(2560, 20000000),
                 new ResolutionConfiguration(3840, 35000000)
             };
 
@@ -29,7 +29,7 @@ namespace MediaBrowser.Model.Dlna
             int? maxWidth,
             int? maxHeight)
         {
-            // If the bitrate isn't changing, then don't downlscale the resolution
+            // If the bitrate isn't changing, then don't downscale the resolution
             if (inputBitrate.HasValue && outputBitrate >= inputBitrate.Value)
             {
                 if (maxWidth.HasValue || maxHeight.HasValue)
@@ -80,11 +80,11 @@ namespace MediaBrowser.Model.Dlna
 
         private static double GetVideoBitrateScaleFactor(string codec)
         {
-            if (string.Equals(codec, "h265", StringComparison.OrdinalIgnoreCase) ||
-                string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase) ||
-                string.Equals(codec, "vp9", StringComparison.OrdinalIgnoreCase))
+            if (string.Equals(codec, "h265", StringComparison.OrdinalIgnoreCase)
+                || string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase)
+                || string.Equals(codec, "vp9", StringComparison.OrdinalIgnoreCase))
             {
-                return .5;
+                return .6;
             }
 
             return 1;
diff --git a/MediaBrowser.Model/Dlna/StreamBuilder.cs b/MediaBrowser.Model/Dlna/StreamBuilder.cs
index 13234c3813..59c9810009 100644
--- a/MediaBrowser.Model/Dlna/StreamBuilder.cs
+++ b/MediaBrowser.Model/Dlna/StreamBuilder.cs
@@ -872,11 +872,34 @@ namespace MediaBrowser.Model.Dlna
             return playlistItem;
         }
 
-        private static int GetDefaultAudioBitrateIfUnknown(MediaStream audioStream)
+        private static int GetDefaultAudioBitrate(string audioCodec, int? audioChannels)
         {
-            if ((audioStream.Channels ?? 0) >= 6)
+            if (!string.IsNullOrEmpty(audioCodec))
             {
-                return 384000;
+                // Default to a higher bitrate for stream copy
+                if (string.Equals(audioCodec, "aac", StringComparison.OrdinalIgnoreCase)
+                    || string.Equals(audioCodec, "mp3", StringComparison.OrdinalIgnoreCase)
+                    || string.Equals(audioCodec, "ac3", StringComparison.OrdinalIgnoreCase)
+                    || string.Equals(audioCodec, "eac3", StringComparison.OrdinalIgnoreCase))
+                {
+                    if ((audioChannels ?? 0) < 2)
+                    {
+                        return 128000;
+                    }
+
+                    return (audioChannels ?? 0) >= 6 ? 640000 : 384000;
+                }
+
+                if (string.Equals(audioCodec, "flac", StringComparison.OrdinalIgnoreCase)
+                    || string.Equals(audioCodec, "alac", StringComparison.OrdinalIgnoreCase))
+                {
+                    if ((audioChannels ?? 0) < 2)
+                    {
+                        return 768000;
+                    }
+
+                    return (audioChannels ?? 0) >= 6 ? 3584000 : 1536000;
+                }
             }
 
             return 192000;
@@ -897,14 +920,27 @@ namespace MediaBrowser.Model.Dlna
             }
             else
             {
-                if (targetAudioChannels.HasValue && audioStream.Channels.HasValue && targetAudioChannels.Value < audioStream.Channels.Value)
+                if (targetAudioChannels.HasValue
+                    && audioStream.Channels.HasValue
+                    && audioStream.Channels.Value > targetAudioChannels.Value)
                 {
-                    // Reduce the bitrate if we're downmixing
-                    defaultBitrate = targetAudioChannels.Value < 2 ? 128000 : 192000;
+                    // Reduce the bitrate if we're downmixing.
+                    defaultBitrate = GetDefaultAudioBitrate(targetAudioCodec, targetAudioChannels);
+                }
+                else if (targetAudioChannels.HasValue
+                         && audioStream.Channels.HasValue
+                         && audioStream.Channels.Value <= targetAudioChannels.Value
+                         && !string.IsNullOrEmpty(audioStream.Codec)
+                         && targetAudioCodecs != null
+                         && targetAudioCodecs.Length > 0
+                         && !Array.Exists(targetAudioCodecs, elem => string.Equals(audioStream.Codec, elem, StringComparison.OrdinalIgnoreCase)))
+                {
+                    // Shift the bitrate if we're transcoding to a different audio codec.
+                    defaultBitrate = GetDefaultAudioBitrate(targetAudioCodec, audioStream.Channels.Value);
                 }
                 else
                 {
-                    defaultBitrate = audioStream.BitRate ?? GetDefaultAudioBitrateIfUnknown(audioStream);
+                    defaultBitrate = audioStream.BitRate ?? GetDefaultAudioBitrate(targetAudioCodec, targetAudioChannels);
                 }
 
                 // Seeing webm encoding failures when source has 1 audio channel and 22k bitrate.
@@ -938,8 +974,28 @@ namespace MediaBrowser.Model.Dlna
             {
                 return 448000;
             }
+            else if (totalBitrate <= 4000000)
+            {
+                return 640000;
+            }
+            else if (totalBitrate <= 5000000)
+            {
+                return 768000;
+            }
+            else if (totalBitrate <= 10000000)
+            {
+                return 1536000;
+            }
+            else if (totalBitrate <= 15000000)
+            {
+                return 2304000;
+            }
+            else if (totalBitrate <= 20000000)
+            {
+                return 3584000;
+            }
 
-            return 640000;
+            return 7168000;
         }
 
         private (PlayMethod?, List<TranscodeReason>) GetVideoDirectPlayProfile(
@@ -1438,6 +1494,32 @@ namespace MediaBrowser.Model.Dlna
                             break;
                         }
 
+                    case ProfileConditionValue.AudioSampleRate:
+                        {
+                            if (!enableNonQualifiedConditions)
+                            {
+                                continue;
+                            }
+
+                            if (int.TryParse(value, NumberStyles.Any, CultureInfo.InvariantCulture, out var num))
+                            {
+                                if (condition.Condition == ProfileConditionType.Equals)
+                                {
+                                    item.AudioSampleRate = num;
+                                }
+                                else if (condition.Condition == ProfileConditionType.LessThanEqual)
+                                {
+                                    item.AudioSampleRate = Math.Min(num, item.AudioSampleRate ?? num);
+                                }
+                                else if (condition.Condition == ProfileConditionType.GreaterThanEqual)
+                                {
+                                    item.AudioSampleRate = Math.Max(num, item.AudioSampleRate ?? num);
+                                }
+                            }
+
+                            break;
+                        }
+
                     case ProfileConditionValue.AudioChannels:
                         {
                             if (string.IsNullOrEmpty(qualifier))
diff --git a/MediaBrowser.Model/Dlna/StreamInfo.cs b/MediaBrowser.Model/Dlna/StreamInfo.cs
index 9399d21f16..55b12ae810 100644
--- a/MediaBrowser.Model/Dlna/StreamInfo.cs
+++ b/MediaBrowser.Model/Dlna/StreamInfo.cs
@@ -110,6 +110,8 @@ namespace MediaBrowser.Model.Dlna
 
         public int? AudioBitrate { get; set; }
 
+        public int? AudioSampleRate { get; set; }
+
         public int? VideoBitrate { get; set; }
 
         public int? MaxWidth { get; set; }
@@ -183,8 +185,10 @@ namespace MediaBrowser.Model.Dlna
                     continue;
                 }
 
+                // Be careful, IsDirectStream==true by default (Static != false or not in query).
+                // See initialization of StreamingRequestDto in AudioController.GetAudioStream() method : Static = @static ?? true.
                 if (string.Equals(pair.Name, "Static", StringComparison.OrdinalIgnoreCase) &&
-                    string.Equals(pair.Value, "false", StringComparison.OrdinalIgnoreCase))
+                    string.Equals(pair.Value, "true", StringComparison.OrdinalIgnoreCase))
                 {
                     continue;
                 }
@@ -250,6 +254,7 @@ namespace MediaBrowser.Model.Dlna
             list.Add(new NameValuePair("SubtitleStreamIndex", item.SubtitleStreamIndex.HasValue && item.SubtitleDeliveryMethod != SubtitleDeliveryMethod.External ? item.SubtitleStreamIndex.Value.ToString(CultureInfo.InvariantCulture) : string.Empty));
             list.Add(new NameValuePair("VideoBitrate", item.VideoBitrate.HasValue ? item.VideoBitrate.Value.ToString(CultureInfo.InvariantCulture) : string.Empty));
             list.Add(new NameValuePair("AudioBitrate", item.AudioBitrate.HasValue ? item.AudioBitrate.Value.ToString(CultureInfo.InvariantCulture) : string.Empty));
+            list.Add(new NameValuePair("AudioSampleRate", item.AudioSampleRate.HasValue ? item.AudioSampleRate.Value.ToString(CultureInfo.InvariantCulture) : string.Empty));
 
             list.Add(new NameValuePair("MaxFramerate", item.MaxFramerate.HasValue ? item.MaxFramerate.Value.ToString(CultureInfo.InvariantCulture) : string.Empty));
             list.Add(new NameValuePair("MaxWidth", item.MaxWidth.HasValue ? item.MaxWidth.Value.ToString(CultureInfo.InvariantCulture) : string.Empty));
@@ -521,7 +526,9 @@ namespace MediaBrowser.Model.Dlna
             get
             {
                 var stream = TargetAudioStream;
-                return stream == null ? null : stream.SampleRate;
+                return AudioSampleRate.HasValue && !IsDirectStream
+                    ? AudioSampleRate
+                    : stream == null ? null : stream.SampleRate;
             }
         }
 
@@ -787,7 +794,7 @@ namespace MediaBrowser.Model.Dlna
 
         public int? GetTargetAudioChannels(string codec)
         {
-            var defaultValue = GlobalMaxAudioChannels;
+            var defaultValue = GlobalMaxAudioChannels ?? TranscodingMaxAudioChannels;
 
             var value = GetOption(codec, "audiochannels");
             if (string.IsNullOrEmpty(value))
diff --git a/MediaBrowser.Model/Dlna/XmlAttribute.cs b/MediaBrowser.Model/Dlna/XmlAttribute.cs
index 3a8939a797..03bb2e4b11 100644
--- a/MediaBrowser.Model/Dlna/XmlAttribute.cs
+++ b/MediaBrowser.Model/Dlna/XmlAttribute.cs
@@ -5,11 +5,20 @@ using System.Xml.Serialization;
 
 namespace MediaBrowser.Model.Dlna
 {
+    /// <summary>
+    /// Defines the <see cref="XmlAttribute" />.
+    /// </summary>
     public class XmlAttribute
     {
+        /// <summary>
+        /// Gets or sets the name of the attribute.
+        /// </summary>
         [XmlAttribute("name")]
         public string Name { get; set; }
 
+        /// <summary>
+        /// Gets or sets the value of the attribute.
+        /// </summary>
         [XmlAttribute("value")]
         public string Value { get; set; }
     }