jellyfin/MediaBrowser.Model/Dlna/StreamBuilder.cs
2014-04-24 01:08:10 -04:00

567 lines
22 KiB
C#

using MediaBrowser.Model.Dto;
using MediaBrowser.Model.Entities;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
namespace MediaBrowser.Model.Dlna
{
public class StreamBuilder
{
private readonly CultureInfo _usCulture = new CultureInfo("en-US");
public StreamInfo BuildAudioItem(AudioOptions options)
{
ValidateAudioInput(options);
var mediaSources = options.MediaSources;
// If the client wants a specific media soure, filter now
if (!string.IsNullOrEmpty(options.MediaSourceId))
{
// Avoid implicitly captured closure
var mediaSourceId = options.MediaSourceId;
mediaSources = mediaSources
.Where(i => string.Equals(i.Id, mediaSourceId, StringComparison.OrdinalIgnoreCase))
.ToList();
}
var streams = mediaSources.Select(i => BuildAudioItem(i, options)).ToList();
foreach (var stream in streams)
{
stream.DeviceId = options.DeviceId;
stream.DeviceProfileId = options.Profile.Id;
}
return GetOptimalStream(streams);
}
public StreamInfo BuildVideoItem(VideoOptions options)
{
ValidateInput(options);
var mediaSources = options.MediaSources;
// If the client wants a specific media soure, filter now
if (!string.IsNullOrEmpty(options.MediaSourceId))
{
// Avoid implicitly captured closure
var mediaSourceId = options.MediaSourceId;
mediaSources = mediaSources
.Where(i => string.Equals(i.Id, mediaSourceId, StringComparison.OrdinalIgnoreCase))
.ToList();
}
var streams = mediaSources.Select(i => BuildVideoItem(i, options)).ToList();
foreach (var stream in streams)
{
stream.DeviceId = options.DeviceId;
stream.DeviceProfileId = options.Profile.Id;
}
return GetOptimalStream(streams);
}
private StreamInfo GetOptimalStream(List<StreamInfo> streams)
{
// Grab the first one that can be direct streamed
// If that doesn't produce anything, just take the first
return streams.FirstOrDefault(i => i.IsDirectStream) ??
streams.FirstOrDefault();
}
private StreamInfo BuildAudioItem(MediaSourceInfo item, AudioOptions options)
{
var playlistItem = new StreamInfo
{
ItemId = options.ItemId,
MediaType = DlnaProfileType.Audio,
MediaSource = item,
RunTimeTicks = item.RunTimeTicks
};
var maxBitrateSetting = options.MaxBitrate ?? options.Profile.MaxBitrate;
var audioStream = item.MediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Audio);
// Honor the max bitrate setting
if (IsAudioEligibleForDirectPlay(item, maxBitrateSetting))
{
var directPlay = options.Profile.DirectPlayProfiles
.FirstOrDefault(i => i.Type == playlistItem.MediaType && IsAudioDirectPlaySupported(i, item, audioStream));
if (directPlay != null)
{
var audioCodec = audioStream == null ? null : audioStream.Codec;
// Make sure audio codec profiles are satisfied
if (!string.IsNullOrEmpty(audioCodec))
{
var conditionProcessor = new ConditionProcessor();
var conditions = options.Profile.CodecProfiles.Where(i => i.Type == CodecType.Audio && i.ContainsCodec(audioCodec))
.SelectMany(i => i.Conditions);
var audioChannels = audioStream == null ? null : audioStream.Channels;
var audioBitrate = audioStream == null ? null : audioStream.BitRate;
if (conditions.All(c => conditionProcessor.IsAudioConditionSatisfied(c, audioChannels, audioBitrate)))
{
playlistItem.IsDirectStream = true;
playlistItem.Container = item.Container;
return playlistItem;
}
}
}
}
var transcodingProfile = options.Profile.TranscodingProfiles
.FirstOrDefault(i => i.Type == playlistItem.MediaType);
if (transcodingProfile != null)
{
playlistItem.IsDirectStream = false;
playlistItem.TranscodeSeekInfo = transcodingProfile.TranscodeSeekInfo;
playlistItem.EstimateContentLength = transcodingProfile.EstimateContentLength;
playlistItem.Container = transcodingProfile.Container;
playlistItem.AudioCodec = transcodingProfile.AudioCodec;
playlistItem.Protocol = transcodingProfile.Protocol;
var audioTranscodingConditions = options.Profile.CodecProfiles
.Where(i => i.Type == CodecType.Audio && i.ContainsCodec(transcodingProfile.AudioCodec))
.Take(1)
.SelectMany(i => i.Conditions);
ApplyTranscodingConditions(playlistItem, audioTranscodingConditions);
// Honor requested max channels
if (options.MaxAudioChannels.HasValue)
{
var currentValue = playlistItem.MaxAudioChannels ?? options.MaxAudioChannels.Value;
playlistItem.MaxAudioChannels = Math.Min(options.MaxAudioChannels.Value, currentValue);
}
// Honor requested max bitrate
if (maxBitrateSetting.HasValue)
{
var currentValue = playlistItem.AudioBitrate ?? maxBitrateSetting.Value;
playlistItem.AudioBitrate = Math.Min(maxBitrateSetting.Value, currentValue);
}
}
return playlistItem;
}
private StreamInfo BuildVideoItem(MediaSourceInfo item, VideoOptions options)
{
var playlistItem = new StreamInfo
{
ItemId = options.ItemId,
MediaType = DlnaProfileType.Video,
MediaSource = item,
RunTimeTicks = item.RunTimeTicks
};
var audioStream = item.MediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Audio);
var videoStream = item.MediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Video);
var maxBitrateSetting = options.MaxBitrate ?? options.Profile.MaxBitrate;
if (IsEligibleForDirectPlay(item, options, maxBitrateSetting))
{
// See if it can be direct played
var directPlay = GetVideoDirectPlayProfile(options.Profile, item, videoStream, audioStream);
if (directPlay != null)
{
playlistItem.IsDirectStream = true;
playlistItem.Container = item.Container;
return playlistItem;
}
}
// Can't direct play, find the transcoding profile
var transcodingProfile = options.Profile.TranscodingProfiles
.FirstOrDefault(i => i.Type == playlistItem.MediaType);
if (transcodingProfile != null)
{
playlistItem.IsDirectStream = false;
playlistItem.Container = transcodingProfile.Container;
playlistItem.EstimateContentLength = transcodingProfile.EstimateContentLength;
playlistItem.TranscodeSeekInfo = transcodingProfile.TranscodeSeekInfo;
playlistItem.AudioCodec = transcodingProfile.AudioCodec.Split(',').FirstOrDefault();
playlistItem.VideoCodec = transcodingProfile.VideoCodec;
playlistItem.Protocol = transcodingProfile.Protocol;
var videoTranscodingConditions = options.Profile.CodecProfiles
.Where(i => i.Type == CodecType.Video && i.ContainsCodec(transcodingProfile.VideoCodec))
.Take(1)
.SelectMany(i => i.Conditions);
ApplyTranscodingConditions(playlistItem, videoTranscodingConditions);
var audioTranscodingConditions = options.Profile.CodecProfiles
.Where(i => i.Type == CodecType.VideoAudio && i.ContainsCodec(transcodingProfile.AudioCodec))
.Take(1)
.SelectMany(i => i.Conditions);
ApplyTranscodingConditions(playlistItem, audioTranscodingConditions);
// Honor requested max channels
if (options.MaxAudioChannels.HasValue)
{
var currentValue = playlistItem.MaxAudioChannels ?? options.MaxAudioChannels.Value;
playlistItem.MaxAudioChannels = Math.Min(options.MaxAudioChannels.Value, currentValue);
}
// Honor requested max bitrate
if (options.MaxAudioTranscodingBitrate.HasValue)
{
var currentValue = playlistItem.AudioBitrate ?? options.MaxAudioTranscodingBitrate.Value;
playlistItem.AudioBitrate = Math.Min(options.MaxAudioTranscodingBitrate.Value, currentValue);
}
// Honor max rate
if (maxBitrateSetting.HasValue)
{
var videoBitrate = maxBitrateSetting.Value;
if (playlistItem.AudioBitrate.HasValue)
{
videoBitrate -= playlistItem.AudioBitrate.Value;
}
var currentValue = playlistItem.VideoBitrate ?? videoBitrate;
playlistItem.VideoBitrate = Math.Min(videoBitrate, currentValue);
}
}
return playlistItem;
}
private DirectPlayProfile GetVideoDirectPlayProfile(DeviceProfile profile,
MediaSourceInfo mediaSource,
MediaStream videoStream,
MediaStream audioStream)
{
// See if it can be direct played
var directPlay = profile.DirectPlayProfiles
.FirstOrDefault(i => i.Type == DlnaProfileType.Video && IsVideoDirectPlaySupported(i, mediaSource, videoStream, audioStream));
if (directPlay == null)
{
return null;
}
var container = mediaSource.Container;
var conditions = profile.ContainerProfiles
.Where(i => i.Type == DlnaProfileType.Video && i.GetContainers().Contains(container, StringComparer.OrdinalIgnoreCase))
.SelectMany(i => i.Conditions);
var conditionProcessor = new ConditionProcessor();
var width = videoStream == null ? null : videoStream.Width;
var height = videoStream == null ? null : videoStream.Height;
var bitDepth = videoStream == null ? null : videoStream.BitDepth;
var videoBitrate = videoStream == null ? null : videoStream.BitRate;
var videoLevel = videoStream == null ? null : videoStream.Level;
var videoProfile = videoStream == null ? null : videoStream.Profile;
var videoFramerate = videoStream == null ? null : videoStream.AverageFrameRate ?? videoStream.AverageFrameRate;
var audioBitrate = audioStream == null ? null : audioStream.BitRate;
var audioChannels = audioStream == null ? null : audioStream.Channels;
var timestamp = videoStream == null ? TransportStreamTimestamp.NONE : videoStream.Timestamp;
var packetLength = videoStream == null ? null : videoStream.PacketLength;
// Check container conditions
if (!conditions.All(i => conditionProcessor.IsVideoConditionSatisfied(i,
audioBitrate,
audioChannels,
width,
height,
bitDepth,
videoBitrate,
videoProfile,
videoLevel,
videoFramerate,
packetLength,
timestamp)))
{
return null;
}
var videoCodec = videoStream == null ? null : videoStream.Codec;
if (string.IsNullOrEmpty(videoCodec))
{
return null;
}
conditions = profile.CodecProfiles
.Where(i => i.Type == CodecType.Video && i.ContainsCodec(videoCodec))
.SelectMany(i => i.Conditions);
if (!conditions.All(i => conditionProcessor.IsVideoConditionSatisfied(i,
audioBitrate,
audioChannels,
width,
height,
bitDepth,
videoBitrate,
videoProfile,
videoLevel,
videoFramerate,
packetLength,
timestamp)))
{
return null;
}
if (audioStream != null)
{
var audioCodec = audioStream.Codec;
if (string.IsNullOrEmpty(audioCodec))
{
return null;
}
conditions = profile.CodecProfiles
.Where(i => i.Type == CodecType.VideoAudio && i.ContainsCodec(audioCodec))
.SelectMany(i => i.Conditions);
if (!conditions.All(i => conditionProcessor.IsVideoAudioConditionSatisfied(i,
audioChannels,
audioBitrate)))
{
return null;
}
}
return directPlay;
}
private bool IsEligibleForDirectPlay(MediaSourceInfo item, VideoOptions options, int? maxBitrate)
{
if (options.SubtitleStreamIndex.HasValue)
{
return false;
}
if (options.AudioStreamIndex.HasValue &&
item.MediaStreams.Count(i => i.Type == MediaStreamType.Audio) > 1)
{
return false;
}
return IsAudioEligibleForDirectPlay(item, maxBitrate);
}
private bool IsAudioEligibleForDirectPlay(MediaSourceInfo item, int? maxBitrate)
{
// Honor the max bitrate setting
return !maxBitrate.HasValue || (item.Bitrate.HasValue && item.Bitrate.Value <= maxBitrate.Value);
}
private void ValidateInput(VideoOptions options)
{
ValidateAudioInput(options);
if (options.AudioStreamIndex.HasValue && string.IsNullOrEmpty(options.MediaSourceId))
{
throw new ArgumentException("MediaSourceId is required when a specific audio stream is requested");
}
if (options.SubtitleStreamIndex.HasValue && string.IsNullOrEmpty(options.MediaSourceId))
{
throw new ArgumentException("MediaSourceId is required when a specific subtitle stream is requested");
}
}
private void ValidateAudioInput(AudioOptions options)
{
if (string.IsNullOrEmpty(options.ItemId))
{
throw new ArgumentException("ItemId is required");
}
if (string.IsNullOrEmpty(options.DeviceId))
{
throw new ArgumentException("DeviceId is required");
}
if (options.Profile == null)
{
throw new ArgumentException("Profile is required");
}
if (options.MediaSources == null)
{
throw new ArgumentException("MediaSources is required");
}
}
private void ApplyTranscodingConditions(StreamInfo item, IEnumerable<ProfileCondition> conditions)
{
foreach (var condition in conditions
.Where(i => !string.IsNullOrEmpty(i.Value)))
{
var value = condition.Value;
switch (condition.Property)
{
case ProfileConditionValue.AudioBitrate:
{
int num;
if (int.TryParse(value, NumberStyles.Any, _usCulture, out num))
{
item.AudioBitrate = num;
}
break;
}
case ProfileConditionValue.AudioChannels:
{
int num;
if (int.TryParse(value, NumberStyles.Any, _usCulture, out num))
{
item.MaxAudioChannels = num;
}
break;
}
case ProfileConditionValue.AudioProfile:
case ProfileConditionValue.Has64BitOffsets:
case ProfileConditionValue.PacketLength:
case ProfileConditionValue.VideoTimestamp:
case ProfileConditionValue.VideoBitDepth:
{
// Not supported yet
break;
}
case ProfileConditionValue.VideoProfile:
{
item.VideoProfile = value;
break;
}
case ProfileConditionValue.Height:
{
int num;
if (int.TryParse(value, NumberStyles.Any, _usCulture, out num))
{
item.MaxHeight = num;
}
break;
}
case ProfileConditionValue.VideoBitrate:
{
int num;
if (int.TryParse(value, NumberStyles.Any, _usCulture, out num))
{
item.VideoBitrate = num;
}
break;
}
case ProfileConditionValue.VideoFramerate:
{
int num;
if (int.TryParse(value, NumberStyles.Any, _usCulture, out num))
{
item.MaxFramerate = num;
}
break;
}
case ProfileConditionValue.VideoLevel:
{
int num;
if (int.TryParse(value, NumberStyles.Any, _usCulture, out num))
{
item.VideoLevel = num;
}
break;
}
case ProfileConditionValue.Width:
{
int num;
if (int.TryParse(value, NumberStyles.Any, _usCulture, out num))
{
item.MaxWidth = num;
}
break;
}
default:
throw new ArgumentException("Unrecognized ProfileConditionValue");
}
}
}
private bool IsAudioDirectPlaySupported(DirectPlayProfile profile, MediaSourceInfo item, MediaStream audioStream)
{
if (profile.Container.Length > 0)
{
// Check container type
var mediaContainer = item.Container ?? string.Empty;
if (!profile.GetContainers().Any(i => string.Equals(i, mediaContainer, StringComparison.OrdinalIgnoreCase)))
{
return false;
}
}
return true;
}
private bool IsVideoDirectPlaySupported(DirectPlayProfile profile, MediaSourceInfo item, MediaStream videoStream, MediaStream audioStream)
{
// Only plain video files can be direct played
if (item.VideoType != VideoType.VideoFile)
{
return false;
}
if (profile.Container.Length > 0)
{
// Check container type
var mediaContainer = item.Container ?? string.Empty;
if (!profile.GetContainers().Any(i => string.Equals(i, mediaContainer, StringComparison.OrdinalIgnoreCase)))
{
return false;
}
}
// Check video codec
var videoCodecs = profile.GetVideoCodecs();
if (videoCodecs.Count > 0)
{
var videoCodec = videoStream == null ? null : videoStream.Codec;
if (string.IsNullOrEmpty(videoCodec) || !videoCodecs.Contains(videoCodec, StringComparer.OrdinalIgnoreCase))
{
return false;
}
}
var audioCodecs = profile.GetAudioCodecs();
if (audioCodecs.Count > 0)
{
// Check audio codecs
var audioCodec = audioStream == null ? null : audioStream.Codec;
if (string.IsNullOrEmpty(audioCodec) || !audioCodecs.Contains(audioCodec, StringComparer.OrdinalIgnoreCase))
{
return false;
}
}
return true;
}
}
}