Class: AudioMonster::Monster

Inherits:
Object
  • Object
show all
Includes:
Configuration, NuWav
Defined in:
lib/audio_monster/monster.rb

Constant Summary collapse

COMMON_EXTENSIONS =

when we want to be sure a format string is chosen esp. when mimemagic has multiple options

{
  'application/xml' => 'xml',
  'audio/mpeg' => 'mp3',
  'audio/flac' => 'flac',
  'audio/mp4'  => 'm4a',
  'audio/ogg'  => 'ogg',
  'image/jpeg' => 'jpg',
  'text/plain' => 'txt'
}
MAX_FILENAME_LENGTH = 
160
MAX_EXTENSION_LENGTH = 
6

Constants included from Configuration

Configuration::AES46_2002_DATE_FORMAT, Configuration::AES46_2002_TIME_FORMAT, Configuration::BINARIES_KEYS, Configuration::FILE_SUCCESS, Configuration::LAME_ERROR_RE, Configuration::LAME_MODES, Configuration::LAME_SUCCESS_RE, Configuration::MP2_BITRATES, Configuration::MP2_SAMPLE_RATES, Configuration::MP3VAL_ERROR_RE, Configuration::MP3VAL_IGNORE_RE, Configuration::MP3VAL_WARNING_RE, Configuration::MP3_BITRATES, Configuration::MP3_SAMPLE_RATES, Configuration::PRSS_DATE_FORMAT, Configuration::SOX_ERROR_RE, Configuration::TWOLAME_MODES, Configuration::TWOLAME_SUCCESS_RE, Configuration::VALID_OPTIONS_KEYS

Instance Method Summary collapse

Methods included from Configuration

#apply_configuration, #bin, #check_binaries, #configure, #current_options, #current_options=, extended, #find_executable, included, #options, #reset!

Constructor Details

#initialize(options = {}) ⇒ Monster

Returns a new instance of Monster.



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# File 'lib/audio_monster/monster.rb', line 34

def initialize(options={})
  apply_configuration(options)
  check_binaries if ENV['AUDIO_MONSTER_DEBUG']
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args, &block) ⇒ Object (protected) 



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# File 'lib/audio_monster/monster.rb', line 945

def method_missing(name, *args, &block)
  if name.to_s.starts_with?('encode_wav_pcm_from_')
    decode_audio(*args)
  elsif name.to_s.starts_with?('info_for_')
    info_for(*args)
  else
    super
  end
end

Instance Method Details

#add_cart_chunk_to_wav(wave_path, result_path, options = {}) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 601

def add_cart_chunk_to_wav(wave_path, result_path, options={})
  wave = NuWav::WaveFile.parse(wave_path)
  unless wave.chunks[:cart]
    cart = CartChunk.new
    now = Time.now
    today = Date.today
    later = today << 12

    cart.title                = options[:title] || File.basename(wave_path)
    cart.artist               = options[:artist]
    cart.cut_id               = options[:cut_id]

    cart.version              = options[:version] || '0101'
    cart.producer_app_id      = options[:producer_app_id] || 'ContentDepot'
    cart.producer_app_version = options[:producer_app_version] || '1.0'
    cart.level_reference      = options[:level_reference] || 0
    cart.tag_text             = options[:tag_text] || "\r\n"
    cart.start_date           = (options[:start_at] || today).strftime(PRSS_DATE_FORMAT)
    cart.start_time           = (options[:start_at] || now).strftime(AES46_2002_TIME_FORMAT)
    cart.end_date             = (options[:end_at] || later).strftime(PRSS_DATE_FORMAT)
    cart.end_time             = (options[:end_at] || now).strftime(AES46_2002_TIME_FORMAT)

    wave.chunks[:cart] = cart
  end

  wave.to_file(result_path)

  check_local_file(result_path)

  return true
end

#append_wav_to_wav(wav_path, append_wav_path, out_path, add_length, fade_length = 5) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 705

def append_wav_to_wav(wav_path, append_wav_path, out_path, add_length, fade_length=5)
  append_wav_info = info_for_wav(append_wav_path)
  raise "append wav is not sufficiently long enough (#{append_wav_info[:length]}) to add length (#{add_length})" if append_wav_info[:length].to_i < add_length

  append_length = [append_wav_info[:length].to_i, (add_length - 1)].min

  append_fade_length = [append_wav_info[:length].to_i, fade_length].min

  # find out if the wav file is stereo or mono as this needs to match the starting wav
  wav_info = info_for_wav(wav_path)
  channels = wav_info[:channel_mode] == 'Mono' ? 1 : 2
  sample_rate = wav_info[:sample_rate]
  append_file = nil

  begin
    append_file = create_temp_file(append_wav_path)
    append_file.close

    # create the wav to append
    command = "#{bin(:sox)} -t wav '#{append_wav_path}' -t raw -s -b 16 -c #{channels} - trim 0 #{append_length} | #{bin(:sox)} -t raw -r #{sample_rate} -s -b 16 -c #{channels} - -t raw - fade h 0 #{append_length} #{append_fade_length} | #{bin(:sox)} -t raw -r #{sample_rate} -s -b 16 -c #{channels} - -t wav '#{append_file.path}' pad 1 0"
    out, err = run_command(command)
    response = out + err
    response.split("\n").each{ |out| raise("append_wav_to_wav: create append file error: '#{response}' on:\n #{command}") if out =~ SOX_ERROR_RE }

    # append the files to out_file
    command = "#{bin(:sox)} -t wav '#{wav_path}' -t wav '#{append_file.path}' -t wav '#{out_path}'"
    out, err = run_command(command)
    response = out + err
    response.split("\n").each{ |out| raise("append_wav_to_wav: create append file error: '#{response}' on:\n #{command}") if out =~ SOX_ERROR_RE }
  ensure
    append_file.close rescue nil
    append_file.unlink rescue nil
  end

  return true
end

#audio_file_bit_rate(path, info = nil) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 293

def audio_file_bit_rate(path, info = nil)
  # audio_file_info_soxi(path, 'B').to_i
  info ||= audio_file_info_ffprobe(path)
  stream = info['streams'].detect { |s| s['codec_type'] == 'audio' }
  bit_rate = stream['bit_rate'] || info['format']['bit_rate']
  (BigDecimal.new(bit_rate) / 1000).round
end

#audio_file_channels(path, info = nil) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 279

def audio_file_channels(path, info = nil)
  # audio_file_info_soxi(path, 'c').to_i
  info ||= audio_file_info_ffprobe(path)
  stream = info['streams'].detect { |s| s['codec_type'] == 'audio' }
  stream['channels'].to_i
end

#audio_file_duration(path, info = nil) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 273

def audio_file_duration(path, info = nil)
  # audio_file_info_soxi(path, 'D').to_f
  info ||= audio_file_info_ffprobe(path)
  info['format']['duration'].to_f
end

#audio_file_format(path, info = nil) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 263

def audio_file_format(path, info = nil)
  info ||= audio_file_info_ffprobe(path)
  f = info['format']['format_name']
  if f == 'mp3'
    stream = info['streams'].detect { |s| s['codec_type'] == 'audio' }
    f = stream['codec_name']
  end
  f.downcase
end

#audio_file_info_ffprobe(path) ⇒ Object Also known as: audio_file_info 



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# File 'lib/audio_monster/monster.rb', line 307

def audio_file_info_ffprobe(path)
  check_local_file(path)
  cmd = bin(:ffprobe) +
    " -v quiet -print_format json -show_format -show_streams" +
    " '#{path}'"
  out, err = run_command(cmd, nice: 'n', echo_return: false)
  json = out.chomp
  JSON.parse(json)
end

#audio_file_info_soxi(path, flag) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 301

def audio_file_info_soxi(path, flag)
  check_local_file(path)
  out, err = run_command("#{bin(:soxi)} -V0 -#{flag} '#{path}'", nice: 'n', echo_return: false)
  out.chomp
end

#audio_file_sample_rate(path, info = nil) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 286

def audio_file_sample_rate(path, info = nil)
  # audio_file_info_soxi(path, 'r').to_i
  info ||= audio_file_info_ffprobe(path)
  stream = info['streams'].detect { |s| s['codec_type'] == 'audio' }
  stream['sample_rate'].to_i
end

#basic_info_for_file(path) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 207

def basic_info_for_file(path)
  ct = content_type(path)
  mm = MimeMagic.new(ct)
  {
    size: File.size(path),
    content_type: ct,
    format: common_extensions(ct) || mm.extensions.first
  }
end

#common_extensions(content_type) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 217

def common_extensions(content_type)
  COMMON_EXTENSIONS[content_type]
end

#concat_wavs(in_paths, out_path) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 667

def concat_wavs(in_paths, out_path)
  first_wav_info = info_for_wav(in_paths.first)
  channels = first_wav_info[:channel_mode] == 'Mono' ? 1 : 2
  sample_rate = first_wav_info[:sample_rate]
  tmp_files = []

  concat_paths = in_paths.inject("") {|cmd, path|
    concat_path = path
    wav_info = info_for_wav(concat_path)
    current_channels = wav_info[:channel_mode] == 'Mono' ? 1 : 2
    current_sample_rate = wav_info[:sample_rate]
    if current_channels != channels || current_sample_rate != sample_rate

      concat_file = create_temp_file(path)
      concat_file.close

      concat_path = concat_file.path
      command = "#{bin(:sox)} -t wav #{path} -t wav -c #{channels} -r #{sample_rate} '#{concat_path}'"
      out, err = run_command(command)
      response = out + err
      response.split("\n").each{ |out| raise("concat_wavs: create temp file error: '#{response}' on:\n #{command}") if out =~ SOX_ERROR_RE }
      tmp_files << concat_file
    end
    cmd << "-t wav '#{concat_path}' "
  }
  command = "#{bin(:sox)} #{concat_paths} -t wav '#{out_path}'"
  out, err = run_command(command)

  response = out + err
  response.split("\n").each{ |out| raise("concat_wavs: concat files error: '#{response}' on:\n #{command}") if out =~ SOX_ERROR_RE }
ensure
  tmp_files.each do |tf|
    tf.close rescue nil
    tf.unlink rescue nil
  end
  tmp_files = nil
end

#content_type(path) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 247

def content_type(path)
  ct = mime_magic_content_type(path)
  ct = file_content_type(path) if (ct.nil? || ct.length == 0)
  ct
end

#create_temp_file(base_file_name = nil, bin_mode = true) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 769

def create_temp_file(base_file_name=nil, bin_mode=true)
  file_name = File.basename(base_file_name)
  file_name = Digest::SHA256.hexdigest(base_file_name) if file_name.length > MAX_FILENAME_LENGTH
  file_ext = File.extname(base_file_name)[0, MAX_EXTENSION_LENGTH]

  FileUtils.mkdir_p(tmp_dir) unless File.exists?(tmp_dir)
  tmp = Tempfile.new([file_name, file_ext], tmp_dir)
  tmp.binmode if bin_mode
  tmp
end

#create_wav_wrapped_mpeg(mpeg_path, result_path, options = {}) ⇒ Object Also known as: create_wav_wrapped_mp2, create_wav_wrapped_mp3

need start_at, ends_on



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# File 'lib/audio_monster/monster.rb', line 566

def create_wav_wrapped_mpeg(mpeg_path, result_path, options={})
  options.to_options!

  start_at = get_datetime_for_option(options[:start_at])
  end_at = get_datetime_for_option(options[:end_at])

  wav_wrapped_mpeg = NuWav::WaveFile.from_mpeg(mpeg_path)
  cart = wav_wrapped_mpeg.chunks[:cart]
  cart.title = options[:title] || File.basename(mpeg_path)
  cart.artist = options[:artist]
  cart.cut_id = options[:cut_id]
  cart.producer_app_id = options[:producer_app_id] if options[:producer_app_id]
  cart.start_date = start_at.strftime(PRSS_DATE_FORMAT)
  cart.start_time = start_at.strftime(AES46_2002_TIME_FORMAT)
  cart.end_date = end_at.strftime(PRSS_DATE_FORMAT)
  cart.end_time = end_at.strftime(AES46_2002_TIME_FORMAT)

  # pass in the options used by NuWav -
  # :no_pad_byte - when true, will not add the pad byte to the data chunk
  nu_wav_options = options.slice(:no_pad_byte)
  wav_wrapped_mpeg.to_file(result_path, nu_wav_options)

  check_local_file(result_path)

  return true
end

#cut_wav(wav_path, out_path, length, fade = 5) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 648

def cut_wav(wav_path, out_path, length, fade=5)
  logger.info "cut_wav: wav_path:#{wav_path}, length:#{length}, fade:#{fade}"

  wav_info = info_for_wav(wav_path)
  logger.debug "cut_wav: wav_info:#{wav_info.inspect}"

  new_length = [wav_info[:length].to_f, length.to_f].min
  fade_length = [wav_info[:length].to_f, fade.to_f].min

  # find out if the wav file is stereo or mono as this needs to match the starting wav
  channels = wav_info[:channel_mode] == 'Mono' ? 1 : 2
  sample_rate = wav_info[:sample_rate]

  command = "#{bin(:sox)} -t wav '#{wav_path}' -t raw -s -b 16 -c #{channels} - trim 0 #{new_length} | #{bin(:sox)} -t raw -r #{sample_rate} -s -b 16 -c #{channels} - -t wav '#{out_path}' fade h 0 #{new_length} #{fade_length}"
  out, err = run_command(command)
  response = out + err
  response.split("\n").each{ |out| raise("cut_wav: cut file error: '#{response}' on:\n #{command}") if out =~ SOX_ERROR_RE }
end

#decode_audio(original_path, wav_path, options = {}) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 174

def decode_audio(original_path, wav_path, options={})
  # check to see if there is an original
  logger.info "decode_audio: #{original_path}, #{wav_path}, #{options.inspect}"
  check_local_file(original_path)

  # if the file extension is banged up, try to get from options, or guess at 'mov'
  input_format = ''
  if options[:source_format] || (File.extname(original_path).length != 4)
    input_format = options[:source_format] ? "-f #{options[:source_format]}" : '-f mov'
  end

  channels = options[:channels] ? options[:channels].to_i : 2
  sample_rate = options[:sample_rate] ? options[:sample_rate].to_i : 44100
  logger.debug "decode_audio: start"
  command = "#{bin(:ffmpeg)} -nostats -loglevel warning -vn -i '#{original_path}' -acodec pcm_s16le -ac #{channels} -ar #{sample_rate} -y -f wav '#{wav_path}'"

  out, err = run_command(command)

  # check to see if there is a file created, or don't go on.
  check_local_file(wav_path)
  return [out, err]
end

#encode_mp2_from_wav(original_path, mp2_path, options = {}) ⇒ Object

valid options :sample_rate :bit_rate :per_channel_bit_rate :channel_mode :protect :copyright :original :emphasis



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# File 'lib/audio_monster/monster.rb', line 328

def encode_mp2_from_wav(original_path, mp2_path, options={})
  check_local_file(original_path)

  options.to_options!
  # parse the wave to see what values to use if not overridden by the options
  wf = WaveFile.parse(original_path)
  fmt = wf.chunks[:fmt]

  wav_sample_size = fmt.sample_bits

  # twolame can only handle up to 16 for floating point (seems to convert to 16 internaly anyway)
  # "Note: the 32-bit samples are currently scaled down to 16-bit samples internally."
  # libtwolame.h  twolame_encode_buffer_float32 http://www.twolame.org/doc/twolame_8h.html#8e77eb0f22479f8ec1bd4f1b042f9cd9
  if (fmt.compression_code.to_i == PCM_FLOATING_COMPRESSION && fmt.sample_bits > 32)
    wav_sample_size = 16
  end

  # input options
  prefix_command = ''
  raw_input      = ''
  sample_rate    = "--samplerate #{fmt.sample_rate}"
  sample_bits    = "--samplesize #{wav_sample_size}"
  channels       = "--channels #{fmt.number_of_channels}"
  input_path     = "'#{original_path}'"

  # output options
  mp2_sample_rate = if MP2_SAMPLE_RATES.include?(options[:sample_rate].to_s)
    options[:sample_rate]
  elsif MP2_SAMPLE_RATES.include?(fmt.sample_rate.to_s)
    fmt.sample_rate.to_s
  else
    '44100'
  end

  if mp2_sample_rate.to_i != fmt.sample_rate.to_i
    prefix_command = "#{bin(:sox)} '#{original_path}' -t raw -r #{mp2_sample_rate} - | "
    input_path = '-'
    raw_input = '--raw-input'
  end

  mode = if TWOLAME_MODES.include?(options[:channel_mode])
    options[:channel_mode] #use the channel mode from the options if specified
  elsif fmt.number_of_channels <= 1
    'm' # default to monoaural for 1 channel input
  else
    's' # default to joint stereo for 2 channel input
  end
  channel_mode = "--mode #{mode}"

  kbps = if options[:per_channel_bit_rate]
    options[:per_channel_bit_rate].to_i * ((mode == 'm') ? 1 : 2)
  elsif options[:bit_rate]
    options[:bit_rate].to_i
  else
    0
  end

  kbps = if MP2_BITRATES.include?(kbps)
    kbps
  elsif mode == 'm' || (mode =='a' && fmt.number_of_channels <= 1)
    128 # default for monoaural is 128 kbps
  else
    256 # default for stereo/dual channel is 256 kbps
  end
  bit_rate = "--bitrate #{kbps}"

  downmix = (mode == 'm' && fmt.number_of_channels > 1) ? '--downmix' : ''

  # default these headers when options not present
  protect = (options.key?(:protect) && !options[:protect] ) ? '' : '--protect'
  copyright = (options.key?(:copyright) && !options[:copyright] ) ? '' : '--copyright'
  original = (options.key?(:original) && !options[:original] ) ? '--non-original' : '--original'
  emphasis = (options.key?(:emphasis)) ? "--deemphasis #{options[:emphasis]}" : '--deemphasis n'

  ##
  # execute the command
  ##
  input_options = "#{raw_input} #{sample_rate} #{sample_bits} #{channels}"
  output_options = "#{channel_mode} #{bit_rate} #{downmix} #{protect} #{copyright} #{original} #{emphasis}"

  command = "#{prefix_command} #{bin(:twolame)} -t 0 #{input_options} #{output_options} #{input_path} '#{mp2_path}'"
  out, err = run_command(command)
  unless out.split("\n").last =~ TWOLAME_SUCCESS_RE
    raise "encode_mp2_from_wav - twolame response on transcoding was not recognized as a success, #{out}, #{err}"
  end

  # make sure there is a file at the end of this
  check_local_file(mp2_path)

  true
end

#encode_mp3_from_wav(original_path, mp3_path, options = {}) ⇒ Object

valid options :sample_rate :bit_rate :channel_mode



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# File 'lib/audio_monster/monster.rb', line 424

def encode_mp3_from_wav(original_path, mp3_path, options={})
  logger.info "encode_mp3_from_wav: #{original_path}, #{mp3_path}, #{options.inspect}"

  check_local_file(original_path)

  options.to_options!
  # parse the wave to see what values to use if not overridden by the options
  wf = WaveFile.parse(original_path)
  fmt = wf.chunks[:fmt]

  input_path = '-'

  mp3_sample_rate = if MP3_SAMPLE_RATES.include?(options[:sample_rate].to_s)
    options[:sample_rate].to_s
  elsif MP3_SAMPLE_RATES.include?(fmt.sample_rate.to_s)
    logger.debug "sample_rate:  fmt.sample_rate = #{fmt.sample_rate}"
    fmt.sample_rate.to_s
  else
    '44100'
  end
  logger.debug "mp3_sample_rate: #{options[:sample_rate]}, #{fmt.sample_rate}"

  mode = if LAME_MODES.include?(options[:channel_mode])
    options[:channel_mode] #use the channel mode from the options if specified
  elsif fmt.number_of_channels <= 1
    'm' # default to monoaural for 1 channel input
  else
    'j' # default to joint stereo for 2 channel input
  end
  channel_mode = "-m #{mode}"

  # if mono selected, but input is in stereo, need to specify downmix to 1 channel for sox
  downmix = (mode == 'm' && fmt.number_of_channels > 1) ? '-c 1' : ''

  # if sample rate different, change that as well in sox before piping to lame
  resample = (mp3_sample_rate.to_i != fmt.sample_rate.to_i) ? "-r #{mp3_sample_rate} " : ''
  logger.debug "resample: #{resample} from comparing #{mp3_sample_rate} #{fmt.sample_rate}"

  # output to wav (-t wav) has a warning
  # '/usr/local/bin/sox wav: Length in output .wav header will be wrong since can't seek to fix it'
  # that messsage can safely be ignored, wa output is easier/safer for lame to recognize, so worth ignoring this message
  prefix_command = "#{bin(:sox)} '#{original_path}' -t wav #{resample} #{downmix} - | "

  kbps = if options[:per_channel_bit_rate]
    options[:per_channel_bit_rate].to_i * ((mode == 'm') ? 1 : 2)
  elsif options[:bit_rate]
    options[:bit_rate].to_i
  else
    0
  end

  kbps = if MP3_BITRATES.include?(kbps)
    kbps
  elsif mode == 'm'
    128 # default for monoaural is 128 kbps
  else
    256 # default for stereo/dual channel is 256 kbps
  end
  bit_rate = "--cbr -b #{kbps}"

  ##
  # execute the command
  ##
  output_options = "#{channel_mode} #{bit_rate}"

  command = "#{prefix_command} #{bin(:lame)} -S #{output_options} #{input_path} '#{mp3_path}'"

  out, err = run_command(command)

  unless out.split("\n")[-1] =~ LAME_SUCCESS_RE
    raise "encode_mp3_from_wav - lame completion unsuccessful: #{out}"
  end

  err.split("\n").each do |l|
    if l =~ LAME_ERROR_RE
      raise "encode_mp3_from_wav - lame response had fatal error: #{l}"
    end
  end
  logger.debug "encode_mp3_from_wav: end!"

  check_local_file(mp3_path)

  true
end

#encode_ogg_from_wav(original_path, result_path, options = {}) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 509

def encode_ogg_from_wav(original_path, result_path, options={})
  logger.info("encode_ogg_from_wav: original_path: #{original_path}, result_path: #{result_path}, options: #{options.inspect}")

  check_local_file(original_path)

  options.to_options!
  # parse the wave to see what values to use if not overridden by the options
  wf = WaveFile.parse(original_path)
  fmt = wf.chunks[:fmt]

  sample_rate = if MP3_SAMPLE_RATES.include?(options[:sample_rate].to_s)
    options[:sample_rate].to_s
  elsif MP3_SAMPLE_RATES.include?(fmt.sample_rate.to_s)
    logger.debug "sample_rate:  fmt.sample_rate = #{fmt.sample_rate}"
    fmt.sample_rate.to_s
  else
    '44100'
  end
  logger.debug "sample_rate: #{options[:sample_rate]}, #{fmt.sample_rate}"

  mode = if LAME_MODES.include?(options[:channel_mode])
    options[:channel_mode] #use the channel mode from the options if specified
  elsif fmt.number_of_channels <= 1
    'm' # default to monoaural for 1 channel input
  else
    'j' # default to joint stereo for 2 channel input
  end

  # can directly set # of channels, 16 or less
  # otherwise fallback on the mode, like mpegs
  # or 2 if all else fails
  channels = if (options[:channels].to_i > 0 )
    [options[:channels].to_i, 16].min
  else
    (mode && (mode == 'm')) ? 1 : 2
  end

  kbps = if options[:per_channel_bit_rate]
    options[:per_channel_bit_rate].to_i * channels
  elsif options[:bit_rate]
    options[:bit_rate].to_i
  else
    0
  end

  bit_rate = (MP3_BITRATES.include?(kbps) ? kbps : 96).to_s + "k"

  command = "#{bin(:ffmpeg)} -nostats -loglevel warning -vn -i '#{original_path}' -acodec libvorbis -ac #{channels} -ar #{sample_rate} -ab #{bit_rate} -y -f ogg '#{result_path}'"

  out, err = run_command(command)

  check_local_file(result_path)

  return true
end

#file_content_type(path) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 257

def file_content_type(path)
  check_local_file(path)
  out, err = run_command("#{bin(:file)} --brief --mime-type '#{path}'", nice: 'n', echo_return: false)
  out.chomp
end

#get_datetime_for_option(d) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 593

def get_datetime_for_option(d)
  return DateTime.now unless d
  d.respond_to?(:strftime) ? d : DateTime.parse(d.to_s)
end

#info_for(path) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 197

def info_for(path)
  ct = content_type(path)
  mm = MimeMagic.new(ct)
  if respond_to?("info_for_#{mm.mediatype}")
    send("info_for_#{mm.mediatype}", path)
  else
    basic_info_for_file(path)
  end
end

#info_for_audio(path) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 221

def info_for_audio(path)
  info = audio_file_info_ffprobe(path)
  audio_info = {
    format:       audio_file_format(path, info),
    channel_mode: audio_file_channels(path, info) <= 1 ? 'Mono' : 'Stereo',
    channels:     audio_file_channels(path, info),
    bit_rate:     audio_file_bit_rate(path, info),
    length:       audio_file_duration(path, info),
    sample_rate:  audio_file_sample_rate(path, info)
  }
  basic_info_for_file(path).merge(audio_info)
end

#info_for_mpeg(path, info = nil) ⇒ Object Also known as: info_for_mp2, info_for_mp3 



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# File 'lib/audio_monster/monster.rb', line 234

def info_for_mpeg(path, info = nil)
  info = info_for_audio(path)
  mp3_info ||= Mp3Info.new(path)
  info[:channel_mode] = mp3_info.channel_mode
  info[:version]      = mp3_info.mpeg_version
  info[:layer]        = mp3_info.layer
  info[:padding]      = mp3_info.header[:padding]
  info
end

#loudness_info(path) ⇒ Object

True peak:

Peak:       -2.1 dBFS



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# File 'lib/audio_monster/monster.rb', line 51

def loudness_info(path)
  command = "#{bin(:ffmpeg)} -nostats -vn -i '#{path}' -y -filter_complex ebur128=peak=true -f null - 2>&1 | tail -12"
  out, err = run_command(command, echo_return: false)

  lines = out.split("\n").map(&:strip).compact.map { |o| o.split(":").map(&:strip) }
  group = nil
  info = {}
  lines.each do |i|
    if i.length == 1 && i[0].length > 0
      group = i[0].downcase.gsub(' ', '_').to_sym
      info[group] ||= {}
    elsif i.length == 2
      key = i[0].downcase.gsub(' ', '_').to_sym
      info[group][key] = i[1].to_f
    end
  end
  info
end

#mime_magic_content_type(path) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 253

def mime_magic_content_type(path)
  (MimeMagic.by_path(path) || MimeMagic.by_magic(path)).to_s
end

#normalize_wav(wav_path, out_path, level = -9)) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 742

def normalize_wav(wav_path, out_path, level=-9)
  logger.info "normalize_wav: wav_path:#{wav_path}, level:#{level}"
  command = "#{bin(:sox)} -t wav '#{wav_path}' -t wav '#{out_path}' gain -n #{level.to_i}"
  out, err = run_command(command)
  response = out + err
  response.split("\n").each{ |out| raise("normalize_wav: normalize audio file error: '#{response}' on:\n #{command}") if out =~ SOX_ERROR_RE }
end

#silence_detect(path, threshold = 0.001, min_time = 2.0) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 122

def silence_detect(path, threshold=0.001, min_time=2.0)
  ranges = []
  # puts "\n#{Time.now} tone_detect(path, tone): #{path}, #{tone}\n"

  threshold = threshold.to_f
  min_time  = min_time.to_f
  normalized_wav_dat = nil

  begin

    normalized_wav_dat = create_temp_file(path + '.dat')
    normalized_wav_dat.close

    command = "#{bin(:sox)} '#{path}' '#{normalized_wav_dat.path}' channels 1 rate 1000 norm"
    out, err = run_command(command)

    current_range = nil

    File.foreach(normalized_wav_dat.path) do |row|
      next if row[0] == ';'

      data = row.split.map(&:to_f)
      time = data[0]
      energy = data[1].abs()

      if energy < threshold
        if !current_range
          current_range = {start: time, finish: time, min: energy, max: energy}
        else
          current_range[:finish] = time
          current_range[:min] = [current_range[:min], energy].min
          current_range[:max] = [current_range[:max], energy].max
        end
      else
        next unless current_range
        ranges << current_range if ((current_range[:finish] - current_range[:start]) > min_time.to_f)
        current_range = nil
      end
    end

    if current_range && ((current_range[:finish] - current_range[:start]) > min_time.to_f)
      ranges << current_range
    end

  ensure
    normalized_wav_dat.close rescue nil
    normalized_wav_dat.unlink rescue nil
  end

  ranges
end

#slice_wav(wav_path, out_path, start, length) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 633

def slice_wav(wav_path, out_path, start, length)
  check_local_file(wav_path)

  wav_info = info_for_wav(wav_path)
  logger.debug "slice_wav: wav_info:#{wav_info.inspect}"

  command = "#{bin(:sox)} -t wav '#{wav_path}' -t wav '#{out_path}' trim #{start} #{length}"
  out, err = run_command(command)
  response = out + err
  response.split("\n").each{ |out| raise("slice_wav: cut file error: '#{response}' on:\n #{command}") if out =~ SOX_ERROR_RE }

  check_local_file(out_path)
  out_path
end

#tone_detect(path, tone, threshold = 0.05, min_time = 0.5) ⇒ Object 



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# File 'lib/audio_monster/monster.rb', line 70

def tone_detect(path, tone, threshold=0.05, min_time=0.5)
  ranges = []

  tone      = tone.to_i
  threshold = threshold.to_f
  min_time  = min_time.to_f
  normalized_wav_dat = nil

  begin

    normalized_wav_dat = create_temp_file(path + '.dat')
    normalized_wav_dat.close

    command = "#{bin(:sox)} '#{path}' '#{normalized_wav_dat.path}' channels 1 rate 200 bandpass #{tone} 3 gain 6"
    out, err = run_command(command)
    current_range = nil

    File.foreach(normalized_wav_dat.path) do |row|
      next if row[0] == ';'

      data = row.split.map(&:to_f)
      time = data[0]
      energy = data[1].abs()

      if energy >= threshold
        if !current_range
          current_range = {start: time, finish: time, min: energy, max: energy}
        else
          current_range[:finish] = time
          current_range[:min] = [current_range[:min], energy].min
          current_range[:max] = [current_range[:max], energy].max
        end
      else
        if current_range && ((current_range[:finish] + min_time.to_f) < time)
          ranges << current_range
          current_range = nil
        end
      end
    end

    if current_range
      ranges << current_range
    end

  ensure
    normalized_wav_dat.close rescue nil
    normalized_wav_dat.unlink rescue nil
  end

  ranges
end

#validate_mpeg(audio_file_path, options) ⇒ Object Also known as: validate_mp2, validate_mp3 



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# File 'lib/audio_monster/monster.rb', line 750

def validate_mpeg(audio_file_path, options)
  @errors = {}

  options = HashWithIndifferentAccess.new(options)

  info = mp3info_validation(audio_file_path, options)

  # if the format seems legit, check the audio itself
  mp3val_validation(audio_file_path, options)

  return @errors, info
end