Class: Ariblib::TransportStreamFile

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

Overview

TSファイル

Constant Summary collapse

Default_payload = 
{
  #0x0000 => ProgramAssociationTable.new,
  #0x0001 => ConditionalAccessTable.new,
  0x0012 => EventInformationTable.new,
  0x0011 => ServiceDescriptionTable.new,
  0x0010 => NetworkInformationTable.new,
  0x0014 => TimeOffsetTable.new,
  0x0029 => CommonDataTable.new,
}
ReadSize = 
188*20

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(filename, payload_list = Default_payload) ⇒ TransportStreamFile

Returns a new instance of TransportStreamFile.



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# File 'lib/ariblib/TransportStreamFile.rb', line 62

def initialize(filename,payload_list=Default_payload)
  @file=open(filename,'rb')
  @bs=BitStream.new(@file.read(ReadSize))
  @payload=payload_list
  @payload.default=TransportStreamPacket.new
  @payload.merge!(payload_list)
  @payload_ap=Hash.new(0)
  @packet_count=0
end

Instance Attribute Details

#adaptation_field_control ⇒ Object (readonly)

Returns the value of attribute adaptation_field_control.



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# File 'lib/ariblib/TransportStreamFile.rb', line 42

def adaptation_field_control
  @adaptation_field_control
end

#bs ⇒ Object (readonly)

Returns the value of attribute bs.



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# File 'lib/ariblib/TransportStreamFile.rb', line 47

def bs
  @bs
end

#continuity_counter ⇒ Object (readonly)

Returns the value of attribute continuity_counter.



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# File 'lib/ariblib/TransportStreamFile.rb', line 48

def continuity_counter
  @continuity_counter
end

#packet_start_pos ⇒ Object (readonly)

Returns the value of attribute packet_start_pos.



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# File 'lib/ariblib/TransportStreamFile.rb', line 43

def packet_start_pos
  @packet_start_pos
end

#payload ⇒ Object (readonly)

Returns the value of attribute payload.



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# File 'lib/ariblib/TransportStreamFile.rb', line 46

def payload
  @payload
end

#payload_ap ⇒ Object (readonly)

Returns the value of attribute payload_ap.



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# File 'lib/ariblib/TransportStreamFile.rb', line 40

def payload_ap
  @payload_ap
end

#payload_length ⇒ Object (readonly)

Returns the value of attribute payload_length.



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

def payload_length
  @payload_length
end

#payload_unit_start_indicator ⇒ Object (readonly)

Returns the value of attribute payload_unit_start_indicator.



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# File 'lib/ariblib/TransportStreamFile.rb', line 49

def payload_unit_start_indicator
  @payload_unit_start_indicator
end

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/ariblib/TransportStreamFile.rb', line 41

def pid
  @pid
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/ariblib/TransportStreamFile.rb', line 76

def close
  @file.close
end

#eof? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ariblib/TransportStreamFile.rb', line 72

def eof?
  @file.eof? && (@bs.lest <= 0)
end

#sync ⇒ Object 



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# File 'lib/ariblib/TransportStreamFile.rb', line 80

def sync
  while(@bs.lest>0 and (c=@bs.read(8))!=0x47) do
  end
  return false if @bs.lest<=0
  @bs.pos-=8
  true
end

#transport_packet ⇒ Object 



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# File 'lib/ariblib/TransportStreamFile.rb', line 88

def transport_packet
  if @bs.lest <= 0
    tmp=@file.read(ReadSize)
    return nil unless tmp
    @bs=BitStream.new(tmp)
  end
  packet_start_pos              = @bs.pos
  sync_byte                     = @bs.getc
  return :async unless sync_byte==0x47
  tmp                           = @bs.getc
  tmp=(tmp<<8)|                   @bs.getc
  #transport_error_indicator     = @bs.read  1 #bslbf
  #@payload_unit_start_indicator = @bs.read  1 #bslbf
  #transport_priority            = @bs.read  1 #bslbf
  #@pid                          = @bs.read  13 #uimsbf
  transport_error_indicator     = tmp & 0x8000 #1 bslbf
  @payload_unit_start_indicator = tmp & 0x4000 #1 bslbf
  transport_priority            = tmp & 0x2000 #1 bslbf
  @pid                          = tmp & 0x1fff #13 uimsbf
  tmp                           = @bs.getc
  #transport_scrambling_control  = @bs.read  2 #bslbf
  #@adaptation_field_control     = @bs.read  2 #bslbf
  #@continuity_counter           = @bs.read  4 #uimsbf
  transport_scrambling_control  = tmp & 0xc0 #2 bslbf
  adaptation_field_control1     = tmp & 0x20 #2 bslbf
  adaptation_field_control2     = tmp & 0x10 #2 bslbf
  @continuity_counter           = tmp & 0x0f #4 uimsbf
  if(adaptation_field_control1 !=0 )
    #adaptation_field()
    @adaptation_field_length    = @bs.getc
    @adaptation_field_length   += 1 #uimsbf
    @adaptation_pos=@bs.pos
    @bs.pos+=@adaptation_field_length
  end
  count = packet_start_pos+188*8
  @payload_length=((count)-@bs.pos)/8
  if(adaptation_field_control2 !=0 )
    @payload[@pid].set(self)
    @payload_ap[@pid]+=1
  end
  @bs.pos=count
  true
end