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Renoise Tool Development
21

As a coincidence, I refined an old “line2table” scheme today with the aim of making it as fast as possible.

The main difference to danoise’s solution is that It tries to minimize overhead in terms of object creation, lookups and function calls. For a new scripter it probably has a simpler syntax as it avoids any OO, but it might not be the prettier solution in a bigger project :slight_smile:

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-- for sequence tracks only
function line2table(line)
  local t_line = {
  ["note_columns"] = {
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true },
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true },
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true },
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true },
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true },
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true },
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true },
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true },
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true },
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true },    
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true },
    { ["delay_value"] = 0, ["effect_amount_value"] = 0, ["effect_number_value"] = 0, ["instrument_value"] = 255, ["note_value"] = 121, ["panning_value"] = 255, ["volume_value"] = 255, ["is_empty"] = true }
  },
  ["effect_columns"] = {
    { ["number_value"] = 0, ["amount_value"] = 0, ["is_empty"] = true },
    { ["number_value"] = 0, ["amount_value"] = 0, ["is_empty"] = true },
    { ["number_value"] = 0, ["amount_value"] = 0, ["is_empty"] = true },
    { ["number_value"] = 0, ["amount_value"] = 0, ["is_empty"] = true },
    { ["number_value"] = 0, ["amount_value"] = 0, ["is_empty"] = true },
    { ["number_value"] = 0, ["amount_value"] = 0, ["is_empty"] = true },
    { ["number_value"] = 0, ["amount_value"] = 0, ["is_empty"] = true },
    { ["number_value"] = 0, ["amount_value"] = 0, ["is_empty"] = true }
  }  
}
  if not line.is_empty then
    for ecol_index, ecol in ipairs(line.effect_columns) do
      if (not ecol.is_empty) then
        local t_ecol = t_line.effect_columns[ecol_index]
        t_ecol.is_empty = false
        t_ecol.number_value = ecol.number_value
        t_ecol.amount_value = ecol.amount_value
      end
    end
    for ncol_index, ncol in ipairs(line.note_columns) do
      if (not ncol.is_empty) then
        local t_ncol = t_line.note_columns[ncol_index]
        t_ncol.is_empty = false
        t_ncol.delay_value = ncol.delay_value
        t_ncol.effect_amount_value = ncol.effect_amount_value
        t_ncol.effect_number_value = ncol.effect_number_value
        t_ncol.instrument_value = ncol.instrument_value
        t_ncol.note_value = ncol.note_value
        t_ncol.panning_value = ncol.panning_value
        t_ncol.volume_value = ncol.volume_value
      end
    end
  end
  return t_line
end

function table2line(t_line, line)
  for ecol_index, ecol in ipairs(t_line.effect_columns) do
    local line_ecol = line:effect_column(ecol_index)
    if ecol.is_empty then
      if (not line_ecol.is_empty) then
        line_ecol:clear()
      end
    else
      line_ecol.number_value = ecol.number_value
      line_ecol.amount_value = ecol.amount_value
    end
  end
  for ncol_index, ncol in ipairs(t_line.note_columns) do
    local line_ncol = line:note_column(ncol_index)
    if ncol.is_empty then
      if (not line_ncol.is_empty) then
        line_ncol:clear()
      end
    else
      line_ncol.delay_value = ncol.delay_value
      line_ncol.effect_amount_value = ncol.effect_amount_value
      line_ncol.effect_number_value = ncol.effect_number_value
      line_ncol.instrument_value = ncol.instrument_value
      line_ncol.note_value = ncol.note_value
      line_ncol.panning_value = ncol.panning_value
      line_ncol.volume_value = ncol.volume_value
    end
  end
end

I think this is as fast and simple as it can get. (Well, there might be (or not) a variation that is 5-10% faster, using line strings and string manipulation for extracting line data. But the code complexity of that didn’t seem justified)

22

Ah, part of the fTrack, chord tracker project I guess? Really looking forward to what you’re cookin’ :slight_smile:

The main difference to danoise’s solution is that It tries to minimize overhead in terms of object creation, lookups and function calls.

…and that it doesn’t know or care about value strings? But I guess you could add converters at any stage.

23

I did not mean to trash talk OO :slight_smile: (For some reason it was damn hard for me to penetrate or start using OO, and I feel stupid in hinesight)

PS. Yes, I did this after stress testing ftracks in a full 512 line track. Noticing a bit of lag, but line2table2line was not the issue :confused: Operations in a 64 line track feels instantaneous, oddly enough.