minimal sound engine

src/engine/init.lua

@@ -4,9 +4,10 @@ local HC = require 'engine/libs/hardoncollider'
 -- has to come before the sti initialization so I can add the collision tiles
 collider = HC(100)
 
-local sti = require "engine/libs/sti"
+local sti = require 'engine/libs/sti'
-local object = require "engine/object"
+local object = require 'engine/object'
-local ui = require "engine/ui"
+local ui = require 'engine/ui'
+local sound = require 'engine/sound'
 local story = require 'story'
 
 Engine = class()
@@ -20,6 +21,10 @@ function Engine:__init()
   story:start(self)
 end
 
+function Engine:playSound(soundName, loop, finishedFunc)
+  return love.audio.play('assets/sound/' .. soundName .. '.ogg', 'stream', loop, finishedFunc)
+end
+
 function Engine:checkObjectAnimation(key)
   for _, object in ipairs(self.objects) do
     if object.relevantKeys then
@@ -33,10 +38,12 @@ function Engine:checkObjectAnimation(key)
 end
 
 function Engine:checkObjectKeys(dt)
-  if not ui.active then
   for _, object in ipairs(self.objects) do
     object.controller.animation:update(dt)
+  end
   
+  if not ui.active then
+    for _, object in ipairs(self.objects) do
       if object.relevantKeys then
         for _, relevantKey in ipairs(object.relevantKeys) do
           if love.keyboard.isDown(relevantKey) then
@@ -58,6 +65,7 @@ function Engine:update(dt)
   self:checkObjectKeys(dt)
   collider:update(dt)
   self.map:update(dt)
+  love.audio.update()
 end
 
 function Engine:draw()
@@ -143,3 +151,12 @@ function Engine:animate(objectName, animationName)
     end
   end
 end
+
+function Engine:stopAnimate(objectName)
+  for _, object in ipairs(self.objects) do
+    if object.name == objectName then
+      object.controller:stopAnimation()
+      break
+    end
+  end
+end

src/engine/sound.lua

@@ -0,0 +1,43 @@
+--will hold the currently playing sources
+local sources = {}
+
+-- check for sources that finished playing and remove them
+-- add to love.update
+function love.audio.update()
+  local remove = {}
+  for _,s in pairs(sources) do
+    if s.audio:isStopped() then
+      if s.finishedFunc then s.finishedFunc() end
+      
+      remove[#remove + 1] = s
+     end
+   end
+
+  for i,s in ipairs(remove) do
+    sources[s] = nil
+  end
+end
+
+-- overwrite love.audio.play to create and register source if needed
+local play = love.audio.play
+function love.audio.play(what, how, loop, finishedFunc)
+  local src = {}
+  if type(what) ~= "userdata" or not what:typeOf("Source") then
+    src.audio = love.audio.newSource(what, how)
+    src.finishedFunc = finishedFunc
+    src.audio:setLooping(loop or false)
+  end
+
+  play(src.audio)
+  sources[src] = src
+    
+  return src
+end
+
+-- stops a source
+local stop = love.audio.stop
+function love.audio.stop(src)
+  if not src then return end
+  stop(src.audio)
+  sources[src] = nil
+end

src/story.lua

@@ -2,8 +2,15 @@ local story = {}
 
 function story:start(engine)
   engine:loadLevel('01')
-  engine:showMessage('Du befindest dich auf einer sturmgebeutelten Insel. Wo ist denn nur die Milch?')
+  
+  local stopRomata = function()
+    engine:stopAnimate('romata')  
+  end
+  
   engine:animate('romata', 'play')
+  engine:playSound('gebet', false, stopRomata)
+  
+  engine:showMessage('Du befindest dich auf einer sturmgebeutelten Insel. Wo ist denn nur die Milch?')
 end
 
 return story