forked from FOSS/BangleApps
65 lines
1.4 KiB
JavaScript
65 lines
1.4 KiB
JavaScript
/* sox Rear_Right.wav -r 4k -b 8 -c 1 -e unsigned-integer 0.raw vol 2
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aplay -r 4000 /tmp/0.raw
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*/
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/* https://forum.espruino.com/conversations/348912/ */
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let pin = D19;
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function play(name, callback) {
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function playChar(offs) {
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var l = 10240;
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var s = require("Storage").read(name, offs, l);
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//print("Waveform " + name + " " + s.length);
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if (!s.length) {
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digitalWrite(pin,0);
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if (callback) callback();
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return;
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}
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var w = new Waveform(s.length);
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var b = w.buffer;
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b.set(s);
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//print("Buffer", s.length);
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//for (var i=s.length-1;i>=0;i--)b[i]/=4;
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w.startOutput(pin, 4000);
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w.on("finish", function(buf) {
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playChar(offs+l);
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});
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}
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analogWrite(pin, 0.1, {freq:40000});
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playChar(0);
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}
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function video(name, callback) {
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function frame() {
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var s = require("Storage").read(name, offs, l);
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if (!s)
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return;
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g.drawImage(s, 0, 0, { scale: 2 });
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g.flip();
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offs += l;
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}
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g.clear();
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var offs = 0;
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//var l = 3875; for 176x176
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//var l = 515; for 64x64
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var l = 971;
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setInterval(frame, 200);
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}
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function run() {
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clearInterval(i);
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print("Running");
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play('bad.araw');
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t1 = getTime();
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video('bad.vraw');
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print("100 frames in ", getTime()-t1);
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// 1.7s, unscaled
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// 2.68s, scale 1.01
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// 5.73s, scale 2.00
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// 9.93s, scale 2, full screen
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// 14.4s scaled. 176/64
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}
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print("Loaded");
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i = setInterval(run, 100); |