Module: WavSpectrumAnalyzer::WaveLetApp

Extended by:
Common
Defined in:
lib/wavspa/wavlet/main.rb,
lib/wavspa/wavlet/preset.rb

Constant Summary collapse

PRESET_TABLE = 
{
  "default" => {
    :sigma           => 24.0,
    :threshold       => 0.01,
    :unit_time       => 10 * 10,
    :scale_mode      => :LOGSCALE,
    :transform_mode  => :POWER,
    :output_width    => 240,
    :range           => [200.0, 8000.0],
    :ceil            => -10.0,
    :floor           => -90.0,
    :luminance       => 3.5,
    :col_step        => 1,
  },

  "cd" => {
    :sigma           => 24.0,
    :threshold       => 0.01,
    :unit_time       => 5 * 10,
    :scale_mode      => :LOGSCALE,
    :transform_mode  => :POWER,
    :output_width    => 480,
    :range           => [50.0, 22050.0],
    :ceil            => -10.0,
    :floor           => -90.0,
    :luminance       => 3.5,
    :col_step        => 1,
  },
}

Class Method Summary collapse

Methods included from Common

down_step, draw_freq_line, draw_time_line, fpos, linear_scaler, log_scaler, time_str, up_step

Class Method Details

.load_param(param) ⇒ Object 



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# File 'lib/wavspa/wavlet/main.rb', line 21

def load_param(param)
  @transform_mode = param[:transform_mode]
  @unit_time      = param[:unit_time]
  @sigma          = param[:sigma]
  @threshold      = param[:threshold]
  @output_width   = param[:output_width]
                 
  @freq_range     = param[:range]
  @ceil           = param[:ceil]
  @floor          = param[:floor]
  @luminance      = param[:luminance]
  @col_step       = param[:col_step]
                 
  @scale_mode     = param[:scale_mode]
  @logscale       = (param[:scale_mode] == :LOGSCALE)
  @basis_freq     = param[:basis_freq] || 440.0 
  @grid_step      = param[:grid_step] || ((@logscale)? 2.0: 2000.0)
                 
  @lo_freq        = @freq_range[0]
  @hi_freq        = @freq_range[1]
  @freq_width     = (@hi_freq - @lo_freq)
                 
  @log_step       = (@hi_freq / @lo_freq) ** (1.0 / @output_width)
  @log_base       = Math.log(@log_step)
end

.main(input, param, output) ⇒ Object 



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# File 'lib/wavspa/wavlet/main.rb', line 48

def main(input, param, output)
  load_param(param)

  wav = WavFile.open(input)
  wl  = Wavelet.new

  wl.frequency       = wav.sample_rate
  wl.sigma           = @sigma
  wl.gabor_threshold = @threshold
  wl.range           = (@lo_freq .. @hi_freq)
  wl.scale_mode      = @scale_mode
  wl.width           = @output_width


  wl.put_in("s%dle" % wav.sample_size, wav.read)

  row   = 0
  usize = (wav.sample_rate * @unit_time) / 1000
  nblk  = (wav.data_size / wav.block_size) / usize

  fb    = FrameBuffer.new(nblk,
                          @output_width,
                          :column_step => @col_step,
                          :margin_x => ($draw_freq_line)? 50:0,
                          :margin_y => ($draw_time_line)? 30:0,
                          :ceil => @ceil,
                          :floor => @floor,
                          :luminance => @luminance)

  if $verbose
    STDERR.print "      - input data\n        \#{input}\n          data size:       \#{wav.data_size}\n          channel num:     \#{wav.channel_num}\n          sample rate:     \#{wav.sample_rate} Hz\n          sample size:     \#{wav.sample_size} bits\n          data rate:       \#{wav.bytes_per_sec} bytes/sec\n\n      - WAVELET parameter\n          sigma:           \#{@sigma}\n          gabor threshold: \#{@threshold}\n          unit time:       \#{@unit_time} ms\n\n      - OUTPUT\n          width:           \#{fb.width}px\n          height:          \#{fb.height}px\n          freq range:      \#{@lo_freq} - \#{@hi_freq}Hz\n          scale mode:      \#{@scale_mode}\n          plot mode :      \#{@transform_mode}\n          ceil:            \#{@ceil}\n          floor:           \#{@floor}\n\n    EOT\n  end\n\n  if wav.channel_num >= 2\n    error(\"error: multi chanel data is not supported \" \\\n          \"(support only monoral data).\")\n  end\n \n  until row >= nblk\n    STDERR.printf(\"\\rtransform \#{row + 1}/\#{nblk}\", row) if $verbose\n    wl.transform(row * usize)\n\n    if @transform_mode == :POWER\n      fb.draw_power(row, wl.power)\n    else\n      fb.draw_amplitude(row, wl.amplitude)\n    end\n\n    row += 1\n  end\n\n  STDERR.printf(\" ... done\\n\") if $verbose\n\n  STDERR.printf(\"write to \#{output} ... \") if $verbose\n\n  draw_freq_line(fb) if $draw_freq_line\n  draw_time_line(fb, wav, usize) if $draw_time_line\n\n  png = PNG.encode(fb.width, fb.height, fb.to_s, :pixel_format => :RGB)\n  IO.binwrite(output, png)\n\n  STDERR.printf(\"done\\n\") if $verbose\nend\n"