Class: BBCNet::MetaInfo

Inherits:
Object
  • Object
show all
Defined in:
lib/bbcnet.rb

Overview

get stream metadata episode url => pid => xml playlist => version pid (vpid aka. identifier)

=> xml stream metadata => wma

Defined Under Namespace

Classes: StreamInfo

Constant Summary collapse

Keys = 
[ :duration, :vpid, :group, :media, :onAirDate, :channel, :title, :summary, :aacLow, :aacStd, :real, :wma, :streams ]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pid) ⇒ MetaInfo

Returns a new instance of MetaInfo.



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# File 'lib/bbcnet.rb', line 59

def initialize(pid)
    @pid = pid
    Keys.each do |k|
        s = ('@' + k.to_s).to_sym
        self.instance_variable_set(s, nil)
        self.class.class_eval %Q{
            def #{k}
                #{s}
            end
        }
    end

    @streams = []
end

Instance Attribute Details

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/bbcnet.rb', line 57

def pid
  @pid
end

Class Method Details

.get(url) ⇒ Object 



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# File 'lib/bbcnet.rb', line 52

def self.get(url)
    pid = BBCNet.extractPid(url)
    self.new(pid)
end

Instance Method Details

#readXmlPlaylist ⇒ Object

read duration, vpid, group, media, onAirDate, channel

from XmlPlaylist



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# File 'lib/bbcnet.rb', line 78

def readXmlPlaylist
    return self if @vpid

    res = BBCNet.read("http://www.bbc.co.uk/iplayer/playlist/#{@pid}")
#             res = IO.read("../tmp/iplayer-playlist-me.xml")

    doc = Nokogiri::XML(res)
    item = doc.at_css("noItems")
    raise "No Playlist " + item[:reason] if item

    item = doc.at_css("item")
    @media = item[:kind].gsub(/programme/i, '')
    @duration = item[:duration].to_i
    @vpid = item[:identifier]
    @group = item[:group]
    @onAirDate = BBCNet.getTime(item.at_css("broadcast").content.to_s)
    @channel = item.at_css("service").content.to_s
    @title = item.at_css("title").content.to_s
    @summary = doc.at_css("summary").content.to_s
    self
end

#readXmlStreamMeta ⇒ Object Also known as: update 



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# File 'lib/bbcnet.rb', line 111

def readXmlStreamMeta
    readXmlPlaylist unless @vpid

    res = BBCNet.read("http://www.bbc.co.uk/mediaselector/4/mtis/stream/#{vpid}")
#             res = IO.read("../tmp/iplayer-stream-meta-me.xml")

    doc = Nokogiri::XML(res)
    me = doc.css("media")
    me.each do |m|
        stmInf = StreamInfo.new
        stmInf.encoding = m[:encoding]  # wma
        stmInf.bitrate = m[:bitrate].to_i    # 48
        expiresStr = m[:expires]
        stmInf.expires = BBCNet.getTime(expiresStr)  if expiresStr
        stmInf.type = m[:kind]          # audio

        con = m.at_css("connection")
        stmInf.indirectUrl = con[:href]
        @streams <<= stmInf

        case stmInf.encoding
        when /\bwma\b/i
            @wma = stmInf
        when /\baac\b/i
            if stmInf.bitrate < 64
                @aacLow = stmInf
            else
                @aacStd = stmInf
            end
        when /\breal\b/i
            @real = stmInf
        end
    end
    self
end