New release (January 2011)

We’re pleased to announce a new release of LuaAV – grab it from here!

API changes:

There have been some important changes in how some of the modules are used. For users of the previous release, here’s a quick summary:

• audio.def module is renamed audio.Def, and usage has changed (see this post for a tutorial) as summarized in this code snippet:
  -- was: require "audio.def"
  local Def = require "audio.Def"
  -- was: audio.def.globalize()
  Def.globalize()
  
  local mydef = Def{
      freq = 440,
      -- was: Mix{ "out", SinOsc{ V"freq" } }
      SinOsc{ P"freq" }
  }

  Other usage remains the same.

• Lattice is now called Array (see this post for more). Usage looks like this:
  local Array = require("Array")
  
  local arr = Array{
      components = 4,         -- The number of components (samples per-cell)
      type = array.Float32,   -- The data type
      dim = {512, 512},      -- The dimensions
      align = 4,            -- Optional byte-alignment
  }
  
  print("components: "..arr.components)
  print("type:       "..types[arr.type])
  print("dim:        "..table.concat(arr.dim, " "))
  
  -- set data in cells:
  arr:setcell(128, 128, { math.random(), math.random() })
  
  -- integer lookup
  print(unpack(arr:getcell(128, 128) ))
  
  -- interpolated floating point lookup
  print(unpack(arr:read(128.5, 128.5) ))

  All existing objects that used matrix or lattice now use array, e.g. Image:array().

• All module names that are actually object constructors have now been capitalized.  This includes both Lua modules and C modules in the following list:
  • image -> Image
  • all of the gui sub-modules
  • array -> Array
  • audio.def -> audio.Def

Changes:

• Entirely rewritten audio.Def module.
  • Many changes have been made to improve the JIT compilation time (with no impact on the performance of the generated machine code). Around a 10x speedup was noted during testing.
  • New generators: Buzz, Saw & Square oscillators, biquad (low-pass, high-pass, band-pass, band-reject, all-pass), noise (white, pink, brown) and other utility generators.
  • Better handling of multi-channel streams in the generators (including new Channels, Mono & Stereo generators)
• Stability improvements in the audio engine, and some optimizations to reduce construction overhead.
• Lua interpreter updated to LuaJIT 2.0 beta5 (OSX).
• Clang module now supports C++ and embedded in libluaav
• Image module on OSX uses CoreGraphics native image I/O framework
• opengl module has been completely re-written and now includes sub-modules for textures, shaders, slabs, and utility drawing functions
• font module now uses both FreeType and native Cocoa NSFont class for font rendering
• New opencl module for parallel data processing on both the CPU and GPU
• The LuaAV console now highlights errors for easy scanning of console output
• Lots of other docfixes and bugfixes (thanks to the students of UCSB MAT 594P especially for pointing many out!)