Class: MAVLink::Log::File

Inherits:
Object
  • Object
show all
Defined in:
lib/mavlink/log/file.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(uri) ⇒ File

Returns a new instance of File.



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# File 'lib/mavlink/log/file.rb', line 24

def initialize(uri)
  @entries = []
  @messages = []
  open(uri, 'rb') do |file|
    loop do
      raw_time = file.read(8)
      break if raw_time.nil?

      time = to_time(raw_time)
      header = to_header(file.read(6))
      payload = file.read(header.length)
      crc = file.read(2).unpack('S>')[0]
      @entries << Entry.new(time, header, payload, crc)
      @messages << MessageFactory.build(@entries.last)
    end
  end
  #@messages.each do |e|
  #  puts e.inspect
  #end
rescue => e
  raise ArgumentError, "File does not appear to be an MAVLink log (#{e})"
end

Instance Attribute Details

#entries ⇒ Object

Returns the value of attribute entries.



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# File 'lib/mavlink/log/file.rb', line 14

def entries
  @entries
end

#messages ⇒ Object

Returns the value of attribute messages.



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# File 'lib/mavlink/log/file.rb', line 14

def messages
  @messages
end

Class Method Details

.mavlink?(uri) ⇒ MAVLink::Log::File

Determines if the file at the given URI is a MAVLink telemetry log file.

Parameters:

  • uri —

    URI to file to read

Returns:



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# File 'lib/mavlink/log/file.rb', line 20

def self.mavlink?(uri)
  File.new(uri) rescue nil
end

Instance Method Details

#duration ⇒ Float

Gets the duration of the session, in seconds.

Returns:

  • (Float) —

    duration of the session, in seconds



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# File 'lib/mavlink/log/file.rb', line 50

def duration
  return 0 if @entries.empty?
  (@entries.last.time - @entries.first.time) / USEC_PER_SEC
end

#ended_at ⇒ Object 



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# File 'lib/mavlink/log/file.rb', line 59

def ended_at
  Time.at(@entries.last.time / USEC_PER_SEC)
end

#started_at ⇒ Object 



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# File 'lib/mavlink/log/file.rb', line 55

def started_at
  Time.at(@entries.first.time / USEC_PER_SEC)
end

#to_kml? ⇒ Boolean

Determines if KML methods can be called for this file.

Returns:

  • (Boolean) —

    true if KML can be generated for this file, false otherwise



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# File 'lib/mavlink/log/file.rb', line 66

def to_kml?
  @entries.any? { |e| e.header.id == GlobalPositionInt::ID }
end