Module: Vlc

Extended by:
Fiddle::Importer
Included in:
Shoes::VideoVlc
Defined in:
lib/shoes/videoffi.rb

Constant Summary collapse

VLC_FUNCTIONS_MAP =

Fiddle’s default ‘extern’ stores all methods into local variable ‘@func_map’, that makes difficult to ‘include Vlc’. So override it and replace ‘@func_map’ into ‘VLC_FUNCTIONS_MAP’. Ref.: /lib/ruby/2.0.0/fiddle/import.rb Borrowed from github.com/vaiorabbit/ruby-opengl

{}
LIBVLC_TRACK_UNKNOWN =

libvlc_track_type_t

-1
LIBVLC_TRACK_AUDIO = 
0
LIBVLC_TRACK_VIDEO = 
1
LIBVLC_TRACK_TEXT = 
2
Audio_track = 
struct [
  'unsigned int i_channels',
  'unsigned int i_rate'
]
Video_track = 
struct [
  'unsigned int i_height',
  'unsigned int i_width',
  'unsigned int i_sar_num',
  'unsigned int i_sar_den',
  'unsigned int i_frame_rate_num',
  'unsigned int i_frame_rate_den'
]
Subtitle_track = 
struct ['char *psz_encoding']
Media_track = 
struct [
  'unsigned int i_codec',
  'unsigned int i_original_fourcc',
  'int i_id',
  'int i_type', # libvlc_track_type_t
  
  # Codec specific
  'int i_profile',
  'int i_level',
  
  # a void pointer representing an union
  'void* kind',
  
  'unsigned int i_bitrate',
  'char *psz_language',
  'char *psz_description'
]
Media_stats = 
struct [
  #/* Input */
  'int         i_read_bytes',
  'float       f_input_bitrate',
  #/* Demux */
  'int         i_demux_read_bytes',
  'float       f_demux_bitrate',
  'int         i_demux_corrupted',
  'int         i_demux_discontinuity',
  #/* Decoders */
  'int         i_decoded_video',
  'int         i_decoded_audio',
  #/* Video Output */
  'int         i_displayed_pictures',
  'int         i_lost_pictures',
  #/* Audio output */
  'int         i_played_abuffers',
  'int         i_lost_abuffers',
  #/* Stream output */
  'int         i_sent_packets',
  'int         i_sent_bytes',
  'float       f_send_bitrate'
]
@@vlc_import_done = 
false

Class Method Summary collapse

Class Method Details

.extern(signature, *opts) ⇒ Object 



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# File 'lib/shoes/videoffi.rb', line 12

def self.extern(signature, *opts)
  symname, ctype, argtype = parse_signature(signature, @type_alias)
  opt = parse_bind_options(opts)
  f = import_function(symname, ctype, argtype, opt[:call_type])
  name = symname.gsub(/@.+/,'')
  VLC_FUNCTIONS_MAP[name] = f
  begin
    /^(.+?):(\d+)/ =~ caller.first
    file, line = $1, $2.to_i
  rescue
    file, line = __FILE__, __LINE__+3
  end
  args_str="*args"
  module_eval(<<-EOS, file, line)
    def #{name}(*args, &block)
      VLC_FUNCTIONS_MAP['#{name}'].call(*args,&block)
    end
  EOS
  module_function(name)
  f
end

.import_symbols ⇒ Object 



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# File 'lib/shoes/videoffi.rb', line 99

def self.import_symbols
  typealias "uint32_t", "unsigned int"
  typealias "libvlc_time_t", "long long"
  typealias "libvlc_track_type_t", "int"

  extern 'libvlc_instance_t * libvlc_new( int , const char* )'
  extern 'void libvlc_release( libvlc_instance_t* )'
  extern 'const char* libvlc_errmsg(void)'

  ### Media
  extern 'libvlc_media_t* libvlc_media_new_path(libvlc_instance_t*, const char* )'
  extern 'libvlc_media_t* libvlc_media_new_location(libvlc_instance_t*, const char* )'
  extern 'void libvlc_media_parse( libvlc_media_t* )'
  extern 'int libvlc_media_is_parsed( libvlc_media_t* )'
  extern 'unsigned int libvlc_media_tracks_get( libvlc_media_t*, libvlc_media_track_t*** )'
  extern 'void libvlc_media_tracks_release( libvlc_media_track_t**, unsigned int )'
  extern 'void libvlc_media_release( libvlc_media_t* )'
  extern 'int libvlc_media_get_stats( libvlc_media_t*, struct libvlc_media_stats_t* )'

  ### Media player
  extern 'libvlc_media_player_t* libvlc_media_player_new( libvlc_instance_t* )'
  extern 'void libvlc_media_player_release( libvlc_media_player_t* )'
#    extern 'void libvlc_media_player_set_media( libvlc_media_player_t*, libvlc_media_t* )'
#    extern 'int libvlc_media_player_play( libvlc_media_player_t* )'
#    extern 'void libvlc_media_player_stop( libvlc_media_player_t* )'
#    extern 'void libvlc_media_player_pause( libvlc_media_player_t* )'
#    extern 'int libvlc_media_player_is_playing( libvlc_media_player_t*)'
  ## Platform specific
  extern 'uint32_t libvlc_media_player_get_xwindow( libvlc_media_player_t*)'
  extern 'void libvlc_media_player_set_xwindow( libvlc_media_player_t*, uint32_t )'
  extern 'void* libvlc_media_player_get_hwnd( libvlc_media_player_t* )'
  extern 'void libvlc_media_player_set_hwnd( libvlc_media_player_t*, void* )'
  extern 'void* libvlc_media_player_get_nsobject( libvlc_media_player_t* )'
  extern 'void libvlc_media_player_set_nsobject( libvlc_media_player_t*, void* )'

  extern 'libvlc_time_t libvlc_media_player_get_time( libvlc_media_player_t* )'
  extern 'void libvlc_media_player_set_time(libvlc_media_player_t*, libvlc_time_t )'
  extern 'libvlc_time_t libvlc_media_player_get_length( libvlc_media_player_t* )'
  extern 'float libvlc_media_player_get_position( libvlc_media_player_t* )'
  extern 'void libvlc_media_player_set_position( libvlc_media_player_t*, float )'

  ### Media List
  extern 'libvlc_media_list_t* libvlc_media_list_new( libvlc_instance_t* )'
  extern 'void libvlc_media_list_release( libvlc_media_list_t* )'
  extern 'int libvlc_media_list_add_media( libvlc_media_list_t*, libvlc_media_t* )'
  extern 'int libvlc_media_list_remove_index( libvlc_media_list_t*, int )'
  extern 'int libvlc_media_list_count( libvlc_media_list_t* )'
  extern 'void libvlc_media_list_lock( libvlc_media_list_t* )'
  extern 'void libvlc_media_list_unlock( libvlc_media_list_t* )'

  ### Media List Player
  extern 'libvlc_media_list_player_t* libvlc_media_list_player_new(libvlc_instance_t* )'
  extern 'void libvlc_media_list_player_release( libvlc_media_list_player_t* )'
#     Not avalaible in vlc 2.2.0
#     extern 'libvlc_media_player_t* libvlc_media_list_player_get_media_player( libvlc_media_list_player_t* )'
  extern 'void libvlc_media_list_player_set_media_player( libvlc_media_list_player_t*, libvlc_media_player_t* )'
  extern 'void libvlc_media_list_player_set_media_list( libvlc_media_list_player_t*, libvlc_media_list_t* )'
  extern 'int libvlc_media_list_player_play( libvlc_media_list_player_t* )'
  extern 'void libvlc_media_list_player_stop( libvlc_media_list_player_t* )'
  extern 'void libvlc_media_list_player_pause( libvlc_media_list_player_t* )'
  extern 'int libvlc_media_list_player_is_playing( libvlc_media_list_player_t* )'
  extern 'int libvlc_media_list_player_next( libvlc_media_list_player_t* )'
  extern 'int libvlc_media_list_player_previous( libvlc_media_list_player_t* )'
  extern 'int libvlc_media_list_player_play_item_at_index( libvlc_media_list_player_t*, int )'
  extern 'int libvlc_media_list_player_play_item( libvlc_media_list_player_t*, libvlc_media_t* )'

  ### Audio controls
  extern 'int libvlc_audio_get_volume( libvlc_media_player_t* )'
  extern 'int libvlc_audio_set_volume( libvlc_media_player_t*, int )'

  ### Video Controls
  extern 'int libvlc_video_get_size( libvlc_media_player_t*, unsigned int, unsigned int*, unsigned int* )'
  
      
  # import some platform specific symbols
  unless RUBY_PLATFORM =~ /darwin/
    extern 'void libvlc_video_set_mouse_input( libvlc_media_player_t *, unsigned int )'
    extern 'void libvlc_video_set_key_input( libvlc_media_player_t *, unsigned int )'
  end
  
  @@vlc_import_done = true
end

.load_lib ⇒ Object

Load native library.



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# File 'lib/shoes/videoffi.rb', line 183

def self.load_lib
  if ENV['VLC_APP_PATH']
    vlcpath = ENV['VLC_APP_PATH']
    Dir.chdir(File.dirname(vlcpath)) do 
      #puts "VLC opening with ENV: #{vlcpath}"
      begin
        dlload(File.basename(vlcpath))
      rescue
        upraise "Sorry, #{vlcpath} doesn't load - is it correct"
      end
    end
  else
    upraise "I can't find 'VLC_APP_PATH' environment variable.\n" \
            "Please check with the Cobbler ('Maintain Shoes' at startup splash)"
  end

  # do a version check to make sure it is 2.1 or 2.2
  extern 'const char* libvlc_get_version()'
  versionstr = libvlc_get_version().to_s
  version = versionstr[/\d.\d/]
  verno = version.to_f
  if verno < 2.1
    upraise "You need a newer VLC: 2.1 or better"
  end
  info "using VLC: #{versionstr}"
  
  import_symbols()

  # just in case ... other functions in Fiddle::Importer are using it
  # The variable is declared in 'dlload'
  @func_map = VLC_FUNCTIONS_MAP
end

.vlc_import_done ⇒ Object 



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# File 'lib/shoes/videoffi.rb', line 216

def self.vlc_import_done
    @@vlc_import_done
end