r2t2 - Transmit data through the PC speaker (#32)

* inital implementation * remove file * ggwave-cli : txProtocol -> txProtocolId * ggwave : add custom protocol enum values * r2t2 : use cutom protocols * r2t2 : build only on Unix systems * r2t2 : remove thread * r2t2-rx : wip * r2t2 : wasm build ready + various fixes * r2t2 : error message * Update README.md * Update README.md * Update README.md * Update README.md * r2t2 : length 16 * r2t2 : use slow protocol by default * r2t2 : add timestamp * r2t2 : update html * r2t2 : update github link * r2t2 : more robust tx * r2t2 : add option to use beep command * emscripten : cannot use requestAnimationFrame when capturing audio This causes the queued audio buffer to grow indefinitely when the page is not focused, causing the process to run out of memory. * r2t2 : disable beep option * Update README.md * Update README.md * Update README.md * Update README.md * Update README.md * Update README.md * r2t2 : add example to README
2026-03-27 06:18:59 +08:00 · 2021-04-18 13:20:45 +03:00
parent 464aa2283b
commit 00b23ff54f
28 changed files with 4153 additions and 29 deletions
--- a/examples/r2t2/main.js
+++ b/examples/r2t2/main.js
@@ -0,0 +1,55 @@
+function transmitText(sText) {
+    var r = new Uint8Array(256);
+    for (var i = 0; i < sText.length; ++i) {
+        r[i] = sText.charCodeAt(i);
+    }
+
+    var buffer = Module._malloc(256);
+    Module.writeArrayToMemory(r, buffer, 256);
+    Module._sendData(sText.length, buffer, protocolId, volume);
+    Module._free(buffer);
+}
+
+var firstTimeFail = false;
+var peerInfo = document.querySelector('a#peer-info');
+
+function updatePeerInfo() {
+    if (typeof Module === 'undefined') return;
+    var framesLeftToRecord = Module._getFramesLeftToRecord();
+    var framesToRecord = Module._getFramesToRecord();
+    var framesLeftToAnalyze = Module._getFramesLeftToAnalyze();
+    var framesToAnalyze = Module._getFramesToAnalyze();
+
+    if (framesToAnalyze > 0) {
+        peerInfo.innerHTML=
+            "Analyzing Rx data: <progress value=" + (framesToAnalyze - framesLeftToAnalyze) +
+            " max=" + (framesToRecord) + "></progress>";
+        peerReceive.innerHTML= "";
+    } else if (framesLeftToRecord > Math.max(0, 0.05*framesToRecord)) {
+        firstTimeFail = true;
+        peerInfo.innerHTML=
+            "Transmission in progress: <progress value=" + (framesToRecord - framesLeftToRecord) +
+            " max=" + (framesToRecord) + "></progress>";
+    } else if (framesToRecord > 0) {
+        peerInfo.innerHTML= "Analyzing Rx data ...";
+    } else if (framesToRecord == 0) {
+        peerInfo.innerHTML= "<p>Listening for waves ...</p>";
+    } else if (framesToRecord == -1) {
+        if (firstTimeFail) {
+            playSound("/media/case-closed");
+            firstTimeFail = false;
+        }
+        peerInfo.innerHTML= "<p style=\"color:red\">Failed to decode Rx data</p>";
+    }
+}
+
+function updateRx() {
+    if (typeof Module === 'undefined') return;
+    Module._getText(bufferRx);
+    var result = "";
+    for (var i = 0; i < 140; ++i){
+        result += (String.fromCharCode((Module.HEAPU8)[bufferRx + i]));
+        brx[i] = (Module.HEAPU8)[bufferRx + i];
+    }
+    document.getElementById('rxData').innerHTML = result;
+}