Class: Ariblib::ProgramSpecificInformation

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

Overview

PSI TSペイロード

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ProgramSpecificInformation

Returns a new instance of ProgramSpecificInformation.



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# File 'lib/ariblib/ProgramSpecificInformation.rb', line 9

def initialize
  @buf=''.force_encoding('ASCII-8BIT')
  @count=nil
  @length=nil
  @contents=[]
  @descriptor_set=DescriptorTag
end

Instance Attribute Details

#contents ⇒ Object (readonly)

Returns the value of attribute contents.



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# File 'lib/ariblib/ProgramSpecificInformation.rb', line 75

def contents
  @contents
end

Instance Method Details

#arib_to_utf8(buf) ⇒ Object 



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# File 'lib/ariblib/ProgramSpecificInformation.rb', line 50

def arib_to_utf8(buf)
      Ariblib::String.new(Ariblib::BitStream.new(buf),buf.length).to_utf8
end

#descriptor(bs, len) ⇒ Object 



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# File 'lib/ariblib/ProgramSpecificInformation.rb', line 53

def descriptor(bs,len)
  return nil if len==0
  h={:tag => [],
    :verbose_pair=>[],
    :verbose=>''.force_encoding('ASCII-8BIT'),
  }

  len=bs.pos+len*8
  while bs.pos < len
    descriptor_tag     =bs.getc #8 uimsbf
    descriptor_length  =bs.getc #8 uimsbf
    len2=bs.pos+descriptor_length*8
    @descriptor_set[descriptor_tag].new(h,bs,descriptor_tag,descriptor_length)
    bs.pos=len2
  end
  bs.pos=len
  h[:verbose_pair]=h[:verbose_pair].map{|v|[v[0],arib_to_utf8(v[1])]}
  h[:verbose]=arib_to_utf8(h[:verbose])
  h.delete :verbose_pair if h[:verbose_pair].size==0
  h.delete :verbose if h[:verbose].size==0
  h
end

#init_buf ⇒ Object 



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# File 'lib/ariblib/ProgramSpecificInformation.rb', line 16

def init_buf
  @buf.clear
  @length=nil
end

#set(ts) ⇒ Object 



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# File 'lib/ariblib/ProgramSpecificInformation.rb', line 35

def set(ts)
  @count=nil if ts.continuity_counter != @count
  buf=ts.bs.str(ts.payload_length)

  if ts.payload_unit_start_indicator != 0
    set_buf(ts,buf.byteslice(1,188))

    @count=ts.continuity_counter
    init_buf
    set_buf(ts,buf.byteslice(buf.getbyte(0)+1,188))
  else
    set_buf(ts,buf)
  end
end

#set_buf(ts, buf) ⇒ Object 



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# File 'lib/ariblib/ProgramSpecificInformation.rb', line 21

def set_buf(ts,buf)
  return unless @count
  @buf+=buf
  @length=(((@buf.getbyte(1)<<8) | @buf.getbyte(2))&0x0fff)+3 if (@length==nil) && (@buf.length>=3)
  if @buf.length>=@length
    @ts=ts
    tmp =parse_buf 
    @contents << tmp if tmp 
    @count=nil
  else
    @count=(@count+1)&0x0f
  end
end