1 files changed, 240 insertions, 0 deletions
diff --git a/third_party/webkit/PerformanceTests/webaudio/webaudio-bench.js b/third_party/webkit/PerformanceTests/webaudio/webaudio-bench.js
new file mode 100644
index 0000000000..b4fb99612b
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/webaudio-bench.js
@@ -0,0 +1,240 @@
+if (window.AudioContext == undefined) {
+  window.AudioContext = window.webkitAudioContext;
+  window.OfflineAudioContext = window.webkitOfflineAudioContext;
+}
+
+$ = document.querySelectorAll.bind(document);
+
+let DURATION = null;
+if (location.search) {
+  let duration = location.search.match(/rendering-buffer-length=(\d+)/);
+  if (duration) {
+    DURATION = duration[1];
+  } else {
+    DURATION = 120;
+  }
+} else {
+  DURATION = 120;
+}
+
+
+// Global sample rate at which we run the context.
+var sampleRate = 48000;
+// Array containing at first the url of the audio resources to fetch, and the
+// the actual buffers audio buffer we have at our disposal to for tests.
+var sources = [];
+// Array containing the results, for each benchmark.
+var results = [];
+// Array containing the offline contexts used to run the testcases.
+var testcases = [];
+// Array containing the functions that can return a runnable testcase.
+var testcases_registered = [];
+// Array containing the audio buffers for each benchmark
+var buffers = [];
+var playingSource = null;
+// audiocontext used to play back the result of the benchmarks
+var ac = new AudioContext();
+
+function getFile(source, callback) {
+  var request = new XMLHttpRequest();
+  request.open("GET", source.url, true);
+  request.responseType = "arraybuffer";
+
+  request.onload = function() {
+    // decode buffer at its initial sample rate
+    var ctx = new OfflineAudioContext(1, 1, source.sampleRate);
+
+    ctx.decodeAudioData(request.response, function(buffer) {
+      callback(buffer, undefined);
+    }, function() {
+      callback(undefined, "Error decoding the file " + source.url);
+    });
+  }
+  request.send();
+}
+
+function recordResult(result) {
+  results.push(result);
+}
+
+function benchmark(testcase, ended) {
+  var context = testcase.ctx;
+  var start;
+
+  context.oncomplete = function(e) {
+    var end = Date.now();
+    recordResult({
+      name: testcase.name,
+      duration: end - start,
+      buffer: e.renderedBuffer
+    });
+    ended();
+  };
+
+  start = Date.now();
+  context.startRendering();
+}
+
+function getMonoFile() {
+  return getSpecificFile({ numberOfChannels: 1 });
+}
+
+function getStereoFile() {
+  return getSpecificFile({ numberOfChannels: 2 });
+}
+
+function matchIfSpecified(a, b) {
+  if (b) {
+    return a == b;
+  }
+  return true;
+}
+
+function getSpecificFile(spec) {
+  for (var i = 0 ; i < sources.length; i++) {
+    if (matchIfSpecified(sources[i].numberOfChannels, spec.numberOfChannels) &&
+        matchIfSpecified(sources[i].sampleRate, spec.sampleRate)) {
+      return sources[i];
+    }
+  }
+
+  throw new Error("Could not find a file that matches the specs.");
+}
+
+function allDone() {
+  document.getElementById("in-progress").style.display = "none";
+  var result = document.getElementById("results");
+  var str = "<table><thead><tr><td>Test name</td><td>Time in ms</td><td>Speedup vs. realtime</td><td>Sound</td></tr></thead>";
+  var buffers_base = buffers.length;
+  var product_of_durations = 1.0;
+
+  for (var i = 0 ; i < results.length; i++) {
+    var r = results[i];
+    product_of_durations *= r.duration;
+    str += "<tr><td>" + r.name + "</td>" +
+               "<td>" + r.duration + "</td>"+
+               "<td>" + Math.round((r.buffer.duration * 1000) / r.duration) + "x</td>"+
+               "<td><button data-soundindex="+(buffers_base + i)+">Play</button> ("+r.buffer.duration+"s)</td>"
+          +"</tr>";
+    buffers[buffers_base + i] = r.buffer;
+  }
+  recordResult({
+    name: "Geometric Mean",
+    duration: Math.round(Math.pow(product_of_durations, 1.0/results.length)),
+    buffer: {}
+  });
+  str += "</table>";
+  result.innerHTML += str;
+  result.addEventListener("click", function(e) {
+    var t = e.target;
+    if (t.dataset.soundindex != undefined) {
+      if (playingSource != null) {
+        playingSource.button.innerHTML = "Play";
+        playingSource.onended = undefined;
+        playingSource.stop(0);
+        if (playingSource.button == t) {
+          playingSource = null;
+          return;
+        }
+      }
+      playingSource = ac.createBufferSource();
+      playingSource.connect(ac.destination);
+      playingSource.buffer = buffers[t.dataset.soundindex];
+      playingSource.start(0);
+      playingSource.button = t;
+      t.innerHTML = "Pause";
+      playingSource.onended = function () {
+        playingSource = null;
+      }
+    }
+  });
+
+  document.getElementById("run-all").disabled = false;
+
+  if (location.search.includes("raptor")) {
+    var _data = ['raptor-benchmark', 'webaudio', JSON.stringify(results)];
+    window.postMessage(_data, '*');
+    window.sessionStorage.setItem('benchmark_results',  JSON.stringify(_data));
+  } else {
+    var xhr = new XMLHttpRequest();
+    xhr.open("POST", "/results", true);
+    xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
+    xhr.send("results=" + JSON.stringify(results));
+  }
+}
+
+function runOne(i) {
+  benchmark(testcases[i], function() {
+    i++;
+    $("#progress-bar")[0].value++;
+    if (i < testcases.length) {
+      runOne(i);
+    } else {
+      allDone();
+    }
+  });
+}
+
+function runAll() {
+  $("#progress-bar")[0].max = testcases_registered.length;
+  $("#progress-bar")[0].value = 0;
+  initAll();
+  results = [];
+  runOne(0);
+}
+
+function initAll() {
+  for (var i = 0; i < testcases_registered.length; i++) {
+    testcases[i] = {};
+    testcases[i].ctx = testcases_registered[i].func();
+    testcases[i].name = testcases_registered[i].name;
+  }
+}
+
+function loadOne(i, endCallback) {
+  getFile(sources[i], function(buffer, err) {
+    if (err) {
+      throw new Error(msg);
+    }
+
+    sources[i] = buffer;
+    i++;
+
+    if (i < sources.length) {
+      loadOne(i, endCallback);
+    } else {
+      endCallback();
+    }
+  });
+}
+
+function loadAllSources(endCallback) {
+  loadOne(0, endCallback);
+}
+
+document.addEventListener("DOMContentLoaded", function() {
+  document.getElementById("run-all").addEventListener("click", function() {
+    document.getElementById("run-all").disabled = true;
+    document.getElementById("in-progress").style.display = "inline";
+    runAll();
+  });
+  loadAllSources(function() {
+    // auto-run when running in raptor
+    document.getElementById("loading").remove();
+    document.getElementById("controls").style.display = "block";
+    if (location.search.includes("raptor")) {
+      document.getElementById("run-all").disabled = true;
+      document.getElementById("in-progress").style.display = "inline";
+      setTimeout(runAll, 100);
+    }
+  });
+});
+
+/* Public API */
+function registerTestCase(testCase) {
+  testcases_registered.push(testCase);
+}
+
+function registerTestFile(url) {
+  sources.push(url);
+}