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-rw-r--r--app/client/audio/draw.js270
1 files changed, 0 insertions, 270 deletions
diff --git a/app/client/audio/draw.js b/app/client/audio/draw.js
deleted file mode 100644
index 8caf8d8..0000000
--- a/app/client/audio/draw.js
+++ /dev/null
@@ -1,270 +0,0 @@
-import {
- browser, requestAudioContext,
- randint, randrange, clamp, mod,
-} from './lib/util'
-
-import './lib/vendor/hidpi-canvas'
-
-import mouse from './lib/mouse'
-import color from './lib/color'
-
-let w, h
-let rx, ry
-
-const pixels_per_second = 512 // 1024
-
-const canvas = document.createElement('canvas')
-// document.body.appendChild(canvas)
-// document.body.addEventListener('resize', resize)
-resize()
-recenter()
-requestAnimationFrame(animate)
-
-// must request context after resizing
-const ctx = canvas.getContext('2d')
-
-const scratch = document.createElement('canvas')
-const scratchCtx = scratch.getContext('2d-lodpi')
-
-function resize(ww, hh){
- w = canvas.width = ww || window.innerWidth
- h = canvas.height = hh || window.innerHeight
- canvas.style.width = w + 'px'
- canvas.style.height = h + 'px'
-}
-function recenter(){
- rx = randint(w), ry = randint(h)
-}
-let frame = null
-function onFrame(fn){
- frame = fn
-}
-function animate(t){
- requestAnimationFrame(animate)
- if (frame) {
- frame(t)
- frame = null
- }
- // ctx.save()
- // ctx.globalAlpha = 0.0001
- // ctx.translate(w/2, h/2)
- // ctx.rotate(0.1)
- // ctx.translate(-rx, -ry)
- // ctx.drawImage(canvas, 0, 0)
- // ctx.restore()
-}
-function clear(n, x, y, ww, hh){
- ctx.fillStyle = 'rgba(255,255,255,' + (n || 0.9) + ')'
- ctx.fillRect(x || 0, y || 0, ww || w, hh || h)
- recenter()
-}
-function triangle(px,py,r){
- setTimeout( () => tri(px,py,r), Math.random()*10)
- // setTimeout( () => tri(px,py,r), Math.random()*200)
- // setTimeout( () => tri(px,py,r), Math.random()*300)
-}
-function tri(px, py, r) {
- ctx.save()
- ctx.globalCompositeOperation = 'multiply'
- ctx.fillStyle = color.color((px+py)/(w+h), 0, 1, 0.2)
- function p(){
- let theta = randrange(0, Math.PI*2)
- let x = px + Math.cos(theta) * r
- let y = py + Math.sin(theta) * r
- return { x, y }
- }
- ctx.beginPath()
- const p0 = p(), p1 = p(), p2 = p()
- ctx.moveTo(p0.x, p0.y)
- ctx.lineTo(p1.x, p1.y)
- ctx.lineTo(p2.x, p2.y)
- ctx.lineTo(p0.x, p0.y)
- ctx.fill()
- ctx.restore()
-}
-function line(y){
- ctx.beginPath()
- ctx.moveTo(0, y)
- ctx.lineTo(w, y)
- ctx.strokeStyle = "#888"
- ctx.strokeWidth = 1
- ctx.stroke()
-}
-function dot(x, y, r){
- ctx.fillStyle = "#f00"
- ctx.beginPath()
- ctx.moveTo(x, y)
- ctx.arc(x, y, r, 0, 2*Math.PI)
- ctx.fill()
-}
-function waveform(pcm, sr, pos, zoom){
- sr = sr || 44100
- pos = pos || 0
-
- var width = w
- var height = Math.floor(h/4)
- var half_height = Math.floor(height/2)
- var x0 = 0
- var y0 = 20
- var ymid = y0 + half_height
- var max_width_in_seconds = width / pixels_per_second
- var max_width_in_samples = max_width_in_seconds * sr
- var pcm_length = pcm.length
- var len = Math.min(pcm_length, max_width_in_samples)
- var pcm_step = sr / pixels_per_second
- var i
- ctx.save()
-
- clear(1, x0, y0, width, height)
-
- line(ymid)
- ctx.beginPath()
- for (i = 0; i < width; i += 0.5) {
- var si = Math.floor(pcm_step * i + pos)
- if (si > pcm_length) break
- var val = pcm[si] // -1, 1
- // ctx.moveTo(x0 + i, ymid)
- ctx.lineTo(x0 + i, ymid + val * half_height)
- }
- ctx.strokeStyle = "rgba(250,20,0,0.9)"
- ctx.strokeWidth = 1
- ctx.stroke()
- ctx.restore()
-}
-
-function spectrum(spec, x0, y0, ww, hh){
- const data = spec.data
- const fft_size = spec.fft_size
- const half_fft_size = spec.fft_size / 2
- const spec_len = data.length
-
- scratch.width = data.length
- scratch.height = half_fft_size
-
- var imageData = ctx.createImageData(scratch.width, scratch.height)
- var pixels = imageData.data
-
- let i, j, u, v, _r, _i, col, hsl
-
- for (i = 0; i < spec_len; i++) {
- col = data[i]
-
- for (j = 0; j < half_fft_size; j++) {
- u = ((half_fft_size - j) * spec_len + i) * 4
- v = j * 2
- _r = col[v]
- _i = mod(col[v+1], Math.PI*2) / (Math.PI*2)
- hsl = color.hsl2rgb((_i + 1) / 2, 1.0, 1 - Math.abs(_r / 10))
- // red - real part
- // pixels[u] = _r * 127 + 127
- // // green - imag part
- // pixels[u+1] = _i * 127 + 127
- // // blue - magnitude
- // pixels[u+2] = Math.sqrt(Math.pow(_r, 2) + Math.pow(_i, 2)) * 128 + 127
- // pixels[u+3] = 255
- pixels[u] = hsl[0]
- pixels[u+1] = hsl[1]
- pixels[u+2] = hsl[2]
- pixels[u+3] = 255
- }
- }
-
- scratchCtx.putImageData(imageData, 0, 0)
-
- var pcm_length = spec.fft_overlap * spec_len
-
- x0 = x0 * devicePixelRatio || 0
- y0 = y0 * devicePixelRatio || Math.floor(h/4)
- ww = ww * devicePixelRatio || w
- hh = hh * devicePixelRatio || h/4
-
- const width = Math.round(pcm_length / spec.sr * pixels_per_second)
- const height = Math.floor(hh)
-
- ctx.save()
- clear(1, x0, y0, w, height)
- ctx.drawImage(scratch, x0, y0, width, height)
- ctx.restore()
-}
-function raw_spectrum(spec, x0, y0, ww, hh, def_min_r, def_min_i){
- const data = spec.data
- const fft_size = spec.fft_size
- const half_fft_size = spec.fft_size / 2
- const spec_len = data.length
-
- const _scratch = document.createElement('canvas')
- const _scratchCtx = _scratch.getContext('2d-lodpi')
- _scratch.width = data.length
- _scratch.height = half_fft_size
- // console.log("spectrum w/h:", _scratch.width, _scratch.height)
-
- var imageData = _scratchCtx.createImageData(_scratch.width, _scratch.height)
- var pixels = imageData.data
-
- let i, j, u, v, _r, _i, col, hsl
- // let min_r = Infinity, max_r = -Infinity
- // let min_i = Infinity, max_i = -Infinity
-
- // determined empirically..
- // let min_r = -60.4894057005308
- // let max_r = 107.23800966675353
- // let min_i = -59.4894057005308
- // let max_i = 108.23800966675353
- let min_r = -def_min_r
- let max_r = def_min_r
- let min_i = -def_min_i
- let max_i = def_min_i
- let delta_r = max_r - min_r
- let delta_i = max_i - min_i
- let mean_r = 0
- let mean_i = 0
- let sum_mean_r = 0, sum_mean_i = 0
- let real, imag
-
- for (i = 0; i < spec_len; i++) {
- col = data[i]
- mean_r = 0
- mean_i = 0
-
- for (j = 0; j < half_fft_size; j++) {
- u = (j * spec_len + i) * 4
- v = j * 2
- real = col[v]
- imag = col[v+1]
- mean_r += real
- mean_i += imag
- _r = clamp((real - min_r) / delta_r * 255, 0, 255)
- _i = clamp((imag - min_i) / delta_i * 255, 0, 255)
-
- // hsl = color.hsl2rgb((_i + 1) / 2, 1.0, 1 - Math.abs(_r / 10))
- pixels[u+0] = _r
- pixels[u+1] = _i
- pixels[u+2] = 127 // hsl[2]
- pixels[u+3] = 255
-
- // min_r = Math.min(min_r, col[v])
- // max_r = Math.max(max_r, col[v])
- // min_i = Math.min(min_i, col[v]+1)
- // max_i = Math.max(max_i, col[v]+1)
- }
- mean_r /= half_fft_size
- mean_i /= half_fft_size
- sum_mean_r += mean_r
- sum_mean_i += mean_i
- }
-
- sum_mean_r /= spec_len
- sum_mean_i /= spec_len
- // console.log(sum_mean_r, sum_mean_i)
- // console.log("r:", min_r, max_r)
- // console.log("i:", min_i, max_i)
- _scratchCtx.putImageData(imageData, 0, 0)
-
- return { canvas: _scratch, imageData }
-}
-
-export default {
- canvas, ctx, onFrame, resize,
- triangle, clear, line, dot,
- waveform, spectrum, raw_spectrum,
-} \ No newline at end of file
generated by cgit v1.2.3-70-g09d2 (git 2.51.0) at 2025-12-12 04:22:13 +0000