Script for Rockbox

GoTo.lua

local print = require("print")

require("buttons")
require("rbsettings")
require("settings")

local goToMs = 0
-- goToMode: 0 - seconds; 1 - minutes; 2 -hours
local goToMode=0
local maxGoToMode = 2
local track_length = 0
local track_name = ""
local act = rb.buttons
local quit = false
local maxGoToMs = 0

local function setTrackLength()
  elapsed = rb.audio("elapsed") or 0
  local totalTimeMs = (rb.audio("length") or 0)
  if(track_length == totalTimeMs) then return end
  
  track_length = totalTimeMs
  local seconds = totalTimeMs/1000
  local minutes = seconds/60
  local hours = minutes/60
  if(seconds < 60) then
    goToMode = 0
    maxGoToMs = (seconds +1)*1000
  elseif (minutes < 60) then
    goToMode = 1
    maxGoToMs = (minutes +1)*60*1000
  else
    goToMode = 2
    maxGoToMs = (hours +1)*60*60*1000
  end
  maxGoToMode = goToMode
end

local function setTrackName()

  if(track_length > 0) then
    local metadata = rb.settings.read
    local cur_trk = "audio_current_track"
    local track_data = {}
    -- grab only settings we are interested in
    track_data.title = rb.metadata.mp3_entry.title
    track_data.path = rb.metadata.mp3_entry.path
    track_name = metadata(cur_trk, track_data.title) or metadata(cur_trk, track_data.path)
  else
    track_name = ""
  end
  return track_name
end

local function nextGoToMode(val)
  local newVal = goToMode + val
  if(newVal<0) then
    goToMode = maxGoToMode
  elseif newVal > maxGoToMode then
    goToMode = 0
  else
    goToMode = newVal
  end
end

local function time_formatted(time_ms, inputMode)
      local indicator = "* "
      local seconds, minutes, hours 
      -- seconds = math.floor(time_ms/1000)
      -- minutes = math.floor(seconds/60)
      -- hours = math.floor(minutes/60)
      seconds = time_ms/1000
      minutes = seconds/60
      hours = minutes/60
      if(seconds >= 60) then
          seconds = seconds%60
      end
      
      if(minutes >= 60) then
          minutes = minutes%60
      end

      local t = { }
      if(hours > 0 or inputMode == 2) then
        if inputMode == 2 then
            t[#t+1] = indicator
        end
          t[#t+1] = hours
          t[#t+1] = "h "
      end
      if(minutes > 0 or hours > 0 or (inputMode or 0) > 0) then
          if inputMode == 1 then
            t[#t+1] = indicator
          end
          t[#t+1] = minutes
          t[#t+1] = "m "
      end
      if inputMode == 0 then
          t[#t+1] = indicator
      end
      t[#t+1] = seconds
      t[#t+1] = "s"

      return table.concat(t)
  end

local function audio_seek(time_ms)
    if(time_ms < track_length) then
      rb.audio("stop")
      rb.audio("play", time_ms, 0)
    end
end

local function power(value,n)
  if(n == 0) then return 1 end
  local result = value
  for v = 1,n-1,1 do result = result*value end
  return result
end

local function getAddMs(count, mode)
  return count*1000*power(60, mode)
end

local function setGoToTime(count)
    -- local addMs = count*1000*power(60, goToMode)
    local addMs = getAddMs(count, goToMode)
    local result = goToMs + addMs
    if(result < 0) then
      goToMs = 0
    elseif(addMs < 0 or result < maxGoToMs) then
      goToMs = result
    else
      goToMs = result % getAddMs(1, maxGoToMode) + (maxGoToMs - getAddMs(1, maxGoToMode))
    end
end

local function action_event(action)
    if (action) == 0 then return end

    if action == act.BUTTON_POWER or action == act.BUTTON_MAIN or action == act.BUTTON_HOME then
        quit = true
    elseif (bit.band(action,act.BUTTON_REL) == act.BUTTON_REL) then
      -- do nothing on button release
    elseif action == act.BUTTON_SELECT then
        audio_seek(goToMs)
    elseif action == act.BUTTON_UP then
        setGoToTime(1)
    elseif action == act.BUTTON_DOWN then
        setGoToTime(-1)
    elseif action == bit.bor(act.BUTTON_UP, act.BUTTON_REPEAT)
              or bit.band(action, act.BUTTON_VOLUP or act.BUTTON_VOL_UP) == (act.BUTTON_VOLUP or act.BUTTON_VOL_UP)
              then
        setGoToTime(10)
    elseif action == bit.bor(act.BUTTON_DOWN, act.BUTTON_REPEAT)
              or bit.band(action, act.BUTTON_VOLDOWN or act.BUTTON_VOL_DOWN) == (act.BUTTON_VOLDOWN or act.BUTTON_VOL_DOWN)
              then
        setGoToTime(-10)
    elseif bit.band(action, act.BUTTON_LEFT) == act.BUTTON_LEFT then
        nextGoToMode(1)
    elseif bit.band(action, act.BUTTON_RIGHT) == act.BUTTON_RIGHT then
        nextGoToMode(-1)
    elseif (action ~= 0) then
        --rb.splash(0, action)
    end
end

local function main()
    setTrackLength()
    setTrackName()
    rb.lcd_clear_display()

    do -- configure print function
        local t_print = print.opt.get(true)
        t_print.autoupdate = false
        t_print.justify    = "center"
        t_print.col = 2
    end



    local i = 5;
    while (not quit and track_length > 0)do
      local but = rb.button_get(false)
      local timeBased = i == 5;

      if(but ~= 0 or timeBased) then
        action_event(but)

        print.opt.line(1)
        print.f() -- clear the line
        print.f(track_name)
        print.f()
        print.f("%s / %s", time_formatted(elapsed), time_formatted(track_length))
        print.f() 
        print.f("Go To: %s", time_formatted(goToMs, goToMode))
        print.f()

        rb.lcd_update()
      end
      rb.sleep(rb.HZ / 10)
      
      if timeBased then
        setTrackLength()
        setTrackName()
        i = 0
      end
      i = i + 1
    end
    rb.splash(100, "exiting")
end

main()