davejachimiak

Spike: Audio layering

Research Objectives

Because render pipeline has support for layering audio, we need to research what it will take to support this in the UI - like adding a background track, and adjusting the volume on both the main track and background track.

Engineering Approach

• Figure out what payload the Render Pipeline contract expects
  • Answer: RP is expecting an audioMix type, an input, multiple audio inputs -- an example of that being below.
• Test hardcoding the input of a background track to supply RP and make sure you're getting the expected output.

davejachimiak

// This file is part of www.nand2tetris.org
// and the book "The Elements of Computing Systems"
// by Nisan and Schocken, MIT Press.
// File name: projects/12/Memory.jack

/**
 * Memory operations library.
 */ 
class Memory {
  static int MEMORY, HEAP_BASE, NEXT_POINTER, SIZE, HEAP_LIMIT, OOM, freeList, i;

davejachimiak

{
  "$schema": "http://json-schema.org/schema#",
  "additionalProperties": false,
  "definitions": {
    "pathType": {
      "type": "string",
      "pattern": "^(\\/?((\\.{2})|([a-z0-9][a-z0-9\\-.]*[a-z0-9]+)|([a-z0-9]*))($|\\/))+$",
      "minLength": 1
    }
  },

davejachimiak

• Functional Reactive Animation. 1997. Conal Elliott and Paul Hudak.
• Functional Reactive Programming From First Principles. 2000. Paul Hudak and Zhanyong Wan.
• Genuinely Functional User Interfaces. 2001. Antony Courtney and Conal Elliott.
• Event-Driven FRP. 2002. Zhanyong Wan, Walid Taha, and Paul Hudak.
• Functional Reactive Programming, Continued. 2002. Henrik Nilsson, Antony Courtney, and John Peterson.
• Push-Pull Reactive Programming. 2009. Conal Elliott
• Asynchronous Functional Reactive Programming for GUIs. 2013. Stephen Chong and Evan Czaplicki.

davejachimiak

all:
	/usr/local/Cellar/bison/3.0.4/bin/bison lispcalc.y && gcc -lm -o lispcalc lispcalc.tab.c 

davejachimiak

-- [Design an *iterative* process for multiplying to integers that] uses a
-- logarithmic number of steps.

double :: Integer -> Integer
double x = x + x

halve :: Integer -> Integer
halve x = x `div` 2

multiply :: Integer -> Integer -> Integer

davejachimiak

-- ...
-- ...
-- [Assume your language doesn't have a multiplication function or
-- table. Given `double` and `half` functions,] design a
-- multiplication procedure that uses a logarithmic number of steps.

double :: Integer -> Integer
double x = x + x

halve :: Integer -> Integer

davejachimiak

var Evented;

Evented = {
  on: function(event, callback) {
    var _base;
    (_base = this.callbacks)[event] || (_base[event] = []);
    return this.callbacks[event].push(callback);
  },
  trigger: function(event) {
    var args, callbacks;

davejachimiak

-- SICP 1.12
--
-- The following pattern of numbers is called Pascal's triangle.
--
--      1
--     1 1
--    1 2 1
--   1 3 3 1
--  1 4 6 4 1
--     ...

davejachimiak

-- SICP 1.11
--
-- A function f is defined by the rule that f(n) = n if n < 3 and
-- f(n) = f(n - 1) + 2f(n - 2) + 3f(n - 3) if n >= 3. Write a
-- procedure computes f by means of a recursive process.
--
f :: Integer -> Integer
f n
    | n < 3 = n
    | otherwise = f (n - 1) + 2 * f (n - 2) + 3 * f (n - 3)