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soundlib.lua

a guest Jan 28th, 2018 81 Never
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  1. local computer=require"computer"
  2. local component=require"component"
  3. local soundlib={}
  4. local sounds={}
  5. local function tcheck(x,t)
  6.   return type(x)==t
  7. end
  8. local smt={}
  9. function smt:play()
  10.   self.playing=true
  11. end
  12. function smt:pause()
  13.   self.playing=false
  14. end
  15. function smt:rewind()
  16.   self.rawpoint=0
  17. end
  18. function smt:stop()
  19.   self.playing=false
  20.   self.rawpoint=0
  21. end
  22. function smt:setVolume(n)
  23.   self.volume=tcheck(n,"number") and math.max(0,math.min(n,10))
  24. end
  25. function smt:getVolume(n)
  26.   return self.volume
  27. end
  28. function smt:getDuration()
  29.   return self.duration*self.delay/1000
  30. end
  31. function smt:seek()
  32.   return self.rawpoint*self.delay/1000
  33. end
  34. function smt:set(rawpos,wave,freq,vol)
  35.   if not(tcheck(rawpos,"number") and tcheck(wave,"string") and tcheck(freq,"number") and tcheck(vol,"number")) then
  36.     error("invalid args",-2)
  37.   end
  38.   if not(self.samples[wave]) or not(self.samples[wave][math.floor(rawpos)]) then
  39.     error("out of range",-2)
  40.   end
  41.   self.samples[wave][math.floor(rawpos)][1],self.samples[wave][math.floor(rawpos)][2]=freq,vol
  42.   return true
  43. end
  44. function smt:get(rawpos,wave,freq,vol)
  45.   if not(tcheck(rawpos,"number") and tcheck(wave,"string") and tcheck(freq,"number") and tcheck(vol,"number")) then
  46.     error("invalid args",-2)
  47.   end
  48.   if not(self.samples[wave]) or not(self.samples[wave][math.floor(rawpos)]) then
  49.     error("out of range",-2)
  50.   end
  51.   local sample=self.samples[wave][math.floor(rawpos)]
  52.   return sample[1],sample[2]
  53. end
  54. function smt:getCurrentSample()
  55.   return self.rawpos
  56. end
  57. function smt:getSampleCount()
  58.   return self.duration
  59. end
  60. function smt:setSeek(pos)
  61.   --if pos*1000 > self.duration*self.delay or pos < 0 then
  62.   --  error("out of range",-2)
  63.   --end
  64.   self.rawpoint=math.min(self.duration*self.delay,math.max(0,pos*1000))
  65. end
  66. function smt:isPlaying()
  67.   return self.playing
  68. end
  69. function smt:setLooping(bool)
  70.   self.rep=not not bool
  71. end
  72. function smt:isLooping()
  73.   return self.rep
  74. end
  75. function smt:destroy()
  76.   for k,v in pairs(sounds) do
  77.     if v==self then
  78.       sounds[k]=nil
  79.       break
  80.     end
  81.   end
  82. end
  83. function smt:isDestroyed()
  84.   for k,v in pairs(sounds) do
  85.     if v==self then
  86.       return false
  87.     end
  88.   end
  89.   return true
  90. end
  91. local s=false
  92. local prevaddress=false
  93. local inited=false
  94. local function middle(numbers)
  95.   local supernumber=0
  96.   local numbercount=0
  97.   for k,v in ipairs(numbers) do
  98.     supernumber=supernumber+v.num*v.power
  99.     numbercount=numbercount+v.power
  100.   end
  101.   return supernumber/numbercount
  102. end
  103. function soundlib.init()
  104.   if not (inited) and component.isAvailable("sound") then
  105.     inited=true
  106.     s=component.sound
  107.     prevaddress=s.address
  108.     return true
  109.   end
  110.   return false
  111. end
  112. function soundlib.getSoundsCount()
  113.   local n=0
  114.   for k,v in pairs(sounds) do
  115.     n=n+1
  116.   end
  117.   return n
  118. end
  119. function soundlib.deinit()
  120.   if inited then
  121.     inited=false
  122.     s=false
  123.     for k,v in pairs(sounds) do
  124.       sounds[k]=nil
  125.     end
  126.     prevaddress=false
  127.     return true
  128.   end
  129.   return false
  130. end
  131. function soundlib.isInited()
  132.   return inited
  133. end
  134. function soundlib.reinit()
  135.   soundlib.deinit()
  136.   return soundlib.init()
  137. end
  138. --[[ Формат объекта звука:
  139. sound={repeat=булиан,playing=булиан,rawpoint=0,duration=кол-во_сэмплов,delay=длительность_сэмплов_в_мс,samples={["тип_волны"]={{freq=частота,vol=громкость}}}}
  140. ]]
  141. function soundlib.newSound(size,delay)
  142.   if not(tcheck(size,"number") and tcheck(delay,"number")) then
  143.     error("invalid args",-2)
  144.   end
  145.   delay=math.max(1,math.min(delay*1000,100000))
  146.   local sound={rep=false,volume=1,prevproc=computer.uptime(),playing=false,rawpoint=0,duration=size,delay=delay}
  147.   sound.samples={square={},sine={},noise={},triangle={}}
  148.   for n=0,size-1 do
  149.     sound.samples.square[n]={0,0}
  150.   end
  151.   for n=0,size-1 do
  152.     sound.samples.sine[n]={0,0}
  153.   end
  154.   for n=0,size-1 do
  155.     sound.samples.noise[n]={0,0}
  156.   end
  157.   for n=0,size-1 do
  158.     sound.samples.triangle[n]={0,0}
  159.   end
  160.   setmetatable(sound,{__index=smt,__newindex=function()end,__metatable={}}) -- _metatable - защита от "хакеров", от которых может рухнуть вся система звуков
  161.   table.insert(sounds,sound)
  162.   return sound
  163. end
  164. function soundlib.process(times) -- Запускать как можно чаще
  165.   local ok=false
  166.   if inited and component.isAvailable("sound") then
  167.     s=component.sound
  168.     if s.address ~= prevaddress then
  169.       soundlib.reinit()
  170.     end
  171.     local modes={square={modeid=1,ch=1},noise={modeid=-1,ch=2},sine={modeid=2,ch=3},triangle={modeid=3,ch=4}}
  172.     for k,v in pairs(sounds) do xpcall(function()
  173.       for mname,mdata in pairs(modes) do
  174.         if v.samples[mname] and v.playing then
  175.           if (not v.samples[mname][math.floor(v.rawpoint)]) or v.rawpoint > v.duration then
  176.             if v.rep then
  177.               v.rawpoint=0
  178.             else
  179.               v.rawpoint=0 v.playing=false
  180.             end
  181.           end
  182.           if v.playing then
  183.             local sample=v.samples[mname][math.floor(v.rawpoint)]
  184.             if sample[1] and sample[2] and sample[2] > 0 and sample[1] > 0 then
  185.               mdata.volume=(mdata.volume or 0)+sample[2]*v.volume
  186.               mdata.freqs=mdata.freqs or {}
  187.               table.insert(mdata.freqs,{num=math.max(0,math.min(sample[1],20000)),power=math.floor(sample[2]*v.volume*100)})
  188.             else
  189.               --print("No playing sounds")
  190.             end
  191.             v.prevproc=v.prevproc or computer.uptime()
  192.             local tm=computer.uptime()-v.prevproc
  193.             v.rawpoint=v.rawpoint+tm*1000*v.delay
  194.             --print(v.rawpoint)
  195.             v.prevproc=computer.uptime()
  196.           end
  197.         end
  198.       end
  199.     end,function(err) print("Sound system errored in sound processing: "..err) end) end
  200.     local sounders=0
  201.     for mname,mdata in pairs(modes) do
  202.       if mdata.freqs and mdata.volume then
  203.         sounders=sounders+1
  204.       end
  205.     end
  206.     for mname,mdata in pairs(modes) do xpcall(function()
  207.       if mdata.freqs and mdata.volume then
  208.         local freq=middle(mdata.freqs)
  209.         s.setWave(mdata.ch,mdata.modeid)
  210.         s.setFrequency(mdata.ch,freq)
  211.         s.open(mdata.ch)
  212.         s.delay(times/sounders)
  213.         s.setVolume(mdata.ch,mdata.volume)
  214.         s.close(mdata.ch)
  215.         while not s.process() do end
  216.         --print(mdata.ch,mdata.volume,freq,require("serialization").serialize(mdata.freqs))
  217.       end
  218.     end,function(err) print("Sound system errored in sound sending: "..err) end) end
  219.     ok=true
  220.   else
  221.     ok=false
  222.   end
  223.   if not component.isAvailable("sound") then
  224.     soundlib.deinit()
  225.   else
  226.     soundlib.init()
  227.   end
  228.   return ok
  229. end
  230. return soundlib
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