Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

13 files changed, 1077 insertions, 0 deletions

diff --git a/third_party/webkit/PerformanceTests/webaudio/LICENSE b/third_party/webkit/PerformanceTests/webaudio/LICENSE
new file mode 100644
index 0000000000..a612ad9813
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/LICENSE
@@ -0,0 +1,373 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.
diff --git a/third_party/webkit/PerformanceTests/webaudio/README.md b/third_party/webkit/PerformanceTests/webaudio/README.md
new file mode 100644
index 0000000000..8fd378b573
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/README.md
@@ -0,0 +1,13 @@
+# webaudio-benchmark
+
+## Run
+
+Just open `index.html`. Time are in milliseconds, lower is better.
+
+## Adding new benchmarks
+
+Look into `benchmarks.js`, it's pretty straightforward.
+
+## License
+
+MPL 2.0
diff --git a/third_party/webkit/PerformanceTests/webaudio/benchmarks.js b/third_party/webkit/PerformanceTests/webaudio/benchmarks.js
new file mode 100644
index 0000000000..1d8f0e78bb
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/benchmarks.js
@@ -0,0 +1,377 @@
+if (typeof(window) == "undefined") {
+  benchmarks = []
+  registerTestFile = function() {}
+  registerTestCase = function(o) { return benchmarks.push(o.name); }
+}
+
+registerTestFile({ sampleRate: 48000, url: "think-mono-48000.wav" });
+registerTestFile({ sampleRate: 44100, url: "think-mono-44100.wav" });
+registerTestFile({ sampleRate: 38000, url: "think-mono-38000.wav" });
+registerTestFile({ sampleRate: 48000, url: "think-stereo-48000.wav" });
+registerTestFile({ sampleRate: 44100, url: "think-stereo-44100.wav" });
+registerTestFile({ sampleRate: 38000, url: "think-stereo-38000.wav" });
+
+registerTestCase({
+  func: function () {
+    var oac = new OfflineAudioContext(1, DURATION * sampleRate, sampleRate);
+    return oac;
+  },
+  name: "Empty testcase"
+});
+
+registerTestCase({
+  func: function () {
+    var oac = new OfflineAudioContext(1, DURATION * sampleRate, sampleRate);
+    var source0 = oac.createBufferSource();
+    source0.buffer = getSpecificFile({ sampleRate: oac.sampleRate, numberOfChannels: 1 });
+    source0.loop = true;
+    source0.connect(oac.destination);
+    source0.start(0);
+    return oac;
+  },
+  name: "Simple source test without resampling"
+});
+
+registerTestCase({
+  func: function() {
+    var oac = new OfflineAudioContext(2, DURATION * sampleRate, sampleRate);
+    var source0 = oac.createBufferSource();
+    source0.buffer = getSpecificFile({ sampleRate: oac.sampleRate, numberOfChannels: 2 });
+    source0.loop = true;
+    source0.connect(oac.destination);
+    source0.start(0);
+    return oac;
+  },
+  name: "Simple source test without resampling (Stereo)"
+});
+
+registerTestCase({
+  func: function () {
+    var oac = new OfflineAudioContext(2, DURATION * sampleRate, sampleRate);
+    var source0 = oac.createBufferSource();
+    var panner = oac.createPanner();
+    source0.buffer = getSpecificFile({ sampleRate: oac.sampleRate, numberOfChannels: 2 });
+    source0.loop = true;
+    panner.setPosition(1, 2, 3);
+    panner.setOrientation(10, 10, 10);
+    source0.connect(panner);
+    panner.connect(oac.destination);
+    source0.start(0);
+    return oac;
+  },
+  name: "Simple source test without resampling (Stereo and positional)"
+});
+
+registerTestCase({
+  func: function() {
+    var oac = new OfflineAudioContext(1, DURATION * sampleRate, sampleRate);
+    var source0 = oac.createBufferSource();
+    source0.buffer = getSpecificFile({ sampleRate: 38000, numberOfChannels: 1 });
+    source0.loop = true;
+    source0.connect(oac.destination);
+    source0.start(0);
+    return oac;
+  },
+  name: "Simple source test with resampling (Mono)"
+});
+
+registerTestCase({
+  func: function() {
+    var oac = new OfflineAudioContext(2, DURATION * sampleRate, sampleRate);
+    var source0 = oac.createBufferSource();
+    source0.buffer = getSpecificFile({ sampleRate: 38000, numberOfChannels: 2 });
+    source0.loop = true;
+    source0.connect(oac.destination);
+    source0.start(0);
+    return oac;
+  },
+  name: "Simple source test with resampling (Stereo)"
+});
+
+registerTestCase({
+  func: function() {
+    var oac = new OfflineAudioContext(2, DURATION * sampleRate, sampleRate);
+    var source0 = oac.createBufferSource();
+    var panner = oac.createPanner();
+    source0.buffer = getSpecificFile({ sampleRate: 38000, numberOfChannels: 2 });
+    source0.loop = true;
+    panner.setPosition(1, 2, 3);
+    panner.setOrientation(10, 10, 10);
+    source0.connect(panner);
+    panner.connect(oac.destination);
+    source0.start(0);
+    return oac;
+  },
+  name: "Simple source test with resampling (Stereo and positional)"
+});
+
+registerTestCase({
+  func: function() {
+    var oac = new OfflineAudioContext(2, DURATION * sampleRate, sampleRate);
+    var source0 = oac.createBufferSource();
+    source0.buffer = getSpecificFile({ sampleRate: oac.sampleRate, numberOfChannels: 1 });
+    source0.loop = true;
+    source0.connect(oac.destination);
+    source0.start(0);
+    return oac;
+  },
+  name: "Upmix without resampling (Mono -> Stereo)"
+});
+
+registerTestCase({
+  func: function() {
+    var oac = new OfflineAudioContext(1, DURATION * sampleRate, sampleRate);
+    var source0 = oac.createBufferSource();
+    source0.buffer = getSpecificFile({ sampleRate: oac.sampleRate, numberOfChannels: 2 });
+    source0.loop = true;
+    source0.connect(oac.destination);
+    source0.start(0);
+    return oac;
+  },
+  name: "Downmix without resampling (Stereo -> Mono)"
+});
+
+registerTestCase({
+  func: function() {
+    var duration_adjusted = DURATION / 4;
+    var oac = new OfflineAudioContext(2, duration_adjusted * sampleRate, sampleRate);
+    for (var i = 0; i < 100; i++) {
+      var source0 = oac.createBufferSource();
+      source0.buffer = getSpecificFile({ sampleRate: 38000, numberOfChannels: 1 });
+      source0.loop = true;
+      source0.connect(oac.destination);
+      source0.start(0);
+    }
+    return oac;
+  },
+  name: "Simple mixing (100x same buffer)"
+});
+
+registerTestCase({
+  func: function() {
+    var duration_adjusted = DURATION / 4;
+    var oac = new OfflineAudioContext(2, duration_adjusted * sampleRate, sampleRate);
+    var reference = getSpecificFile({ sampleRate: 38000, numberOfChannels: 1 }).getChannelData(0);
+    for (var i = 0; i < 100; i++) {
+      var source0 = oac.createBufferSource();
+      // copy the buffer into the a new one, so we know the implementation is not
+      // sharing them.
+      var b = oac.createBuffer(1, reference.length, 38000);
+      var data = b.getChannelData(0);
+      for (var j = 0; j < b.length; j++) {
+        data[i] = reference[i];
+      }
+      source0.buffer = b;
+      source0.loop = true;
+      source0.connect(oac.destination);
+      source0.start(0);
+    }
+    return oac;
+  },
+  name: "Simple mixing (100 different buffers)"
+});
+
+registerTestCase({
+  func: function() {
+    var oac = new OfflineAudioContext(2, DURATION * sampleRate, sampleRate);
+    var gain = oac.createGain();
+    gain.gain.value = -1;
+    gain.connect(oac.destination);
+    var gainsi = [];
+    for (var i = 0; i < 4; i++) {
+      var gaini = oac.createGain();
+      gaini.gain.value = 0.25;
+      gaini.connect(gain);
+      gainsi[i] = gaini
+    }
+    for (var j = 0; j < 2; j++) {
+      var sourcej = oac.createBufferSource();
+      sourcej.buffer = getSpecificFile({ sampleRate: 38000, numberOfChannels: 1 });
+      sourcej.loop = true;
+      sourcej.start(0);
+      for (var i = 0; i < 4; i++) {
+        var gainij = oac.createGain();
+        gainij.gain.value = 0.5;
+        gainij.connect(gainsi[i]);
+        sourcej.connect(gainij);
+      }
+    }
+    return oac;
+  },
+  name: "Simple mixing with gains"
+});
+
+registerTestCase({
+  func: function() {
+    var duration_adjusted = DURATION / 8;
+    var oac = new OfflineAudioContext(1, duration_adjusted * sampleRate, sampleRate);
+    var i,l;
+    var decay = 10;
+    var duration = 4;
+    var len = sampleRate * duration;
+    var buffer = ac.createBuffer(2, len, oac.sampleRate)
+    var iL = buffer.getChannelData(0)
+    var iR = buffer.getChannelData(1)
+    // Simple exp decay loop
+    for(i=0,l=buffer.length;i<l;i++) {
+      iL[i] = (Math.random() * 2 - 1) * Math.pow(1 - i / len, decay);
+      iR[i] = (Math.random() * 2 - 1) * Math.pow(1 - i / len, decay);
+    }
+    var convolver = oac.createConvolver();
+    convolver.buffer = buffer;
+    convolver.connect(oac.destination);
+
+    var audiobuffer = getSpecificFile({ sampleRate: sampleRate, numberOfChannels: 1 });
+    var source0 = oac.createBufferSource();
+    source0.buffer = audiobuffer;
+    source0.loop = true;
+    source0.connect(convolver);
+    source0.start(0);
+    return oac;
+  },
+  name: "Convolution reverb"
+});
+
+registerTestCase({
+  func: function() {
+    // this test case is very slow in chrome, reduce the total duration to avoid
+    // timeout
+    var duration_adjusted = DURATION / 16;
+    var oac = new OfflineAudioContext(1, duration_adjusted * sampleRate, sampleRate);
+    var duration = duration_adjusted * sampleRate;
+    var audiobuffer = getSpecificFile({ sampleRate: sampleRate, numberOfChannels: 1 });
+    var offset = 0;
+    while (offset < duration / sampleRate) {
+      var grain = oac.createBufferSource();
+      var gain = oac.createGain();
+      grain.connect(gain);
+      gain.connect(oac.destination);
+      grain.buffer = audiobuffer;
+      // get a random 100-ish ms with enveloppes
+      var start = offset * Math.random() * 0.5;
+      var end = start + 0.005 * (0.999 * Math.random());
+      grain.start(offset, start, end);
+      gain.gain.setValueAtTime(offset, 0);
+      gain.gain.linearRampToValueAtTime(.5, offset + 0.005);
+      var startRelease = Math.max(offset + (end - start), 0);
+      gain.gain.setValueAtTime(0.5, startRelease);
+      gain.gain.linearRampToValueAtTime(0.0, startRelease + 0.05);
+
+      // some overlap
+      offset += 0.005;
+    }
+    return oac;
+  },
+  name: "Granular synthesis"
+});
+
+registerTestCase({
+  func: function() {
+    var sampleRate = 44100;
+    var duration  = DURATION;
+    var oac = new OfflineAudioContext(1, duration * sampleRate, 44100);
+    var offset = 0;
+    while (offset < duration) {
+      var note = oac.createOscillator();
+      var env = oac.createGain();
+      note.type = "sawtooth";
+      note.frequency.value = 110;
+      note.connect(env);
+      env.gain.setValueAtTime(0, 0);
+      env.gain.setValueAtTime(0.5, offset);
+      env.gain.setTargetAtTime(0, offset+0.01, 0.1);
+      env.connect(oac.destination);
+      note.start(offset);
+      note.stop(offset + 1.0);
+      offset += 140 / 60 / 4; // 140 bpm
+    }
+    return oac;
+  },
+  name: "Synth"
+});
+
+registerTestCase({
+  func: function() {
+    var sampleRate = 44100;
+    var duration  = DURATION;
+    var oac = new OfflineAudioContext(1, duration * sampleRate, sampleRate);
+    var offset = 0;
+    var osc = oac.createOscillator();
+    osc.type = "sawtooth";
+    var enveloppe = oac.createGain();
+    enveloppe.gain.setValueAtTime(0, 0);
+    var filter = oac.createBiquadFilter();
+    osc.connect(enveloppe);
+    enveloppe.connect(filter);
+    filter.connect(oac.destination);
+    filter.frequency.setValueAtTime(0.0, 0.0);
+    filter.Q.setValueAtTime(20, 0.0);
+    osc.start(0);
+    osc.frequency.setValueAtTime(110, 0);
+
+    while (offset < duration) {
+      enveloppe.gain.setValueAtTime(1.0, offset);
+      enveloppe.gain.setTargetAtTime(0.0, offset, 0.1);
+      filter.frequency.setValueAtTime(0, offset);
+      filter.frequency.setTargetAtTime(3500, offset, 0.03);
+      offset += 140 / 60 / 16;
+    }
+    return oac;
+  },
+  name: "Substractive synth"
+});
+
+registerTestCase({
+  func: function () {
+    var oac = new OfflineAudioContext(2, DURATION * sampleRate, sampleRate);
+    var source0 = oac.createBufferSource();
+    var panner = oac.createStereoPanner();
+    source0.buffer = getSpecificFile({ sampleRate: oac.sampleRate, numberOfChannels: 2 });
+    source0.loop = true;
+    panner.pan = 0.1;
+    source0.connect(panner);
+    panner.connect(oac.destination);
+    source0.start(0);
+    return oac;
+  },
+  name: "Stereo Panning"
+});
+
+registerTestCase({
+  func: function () {
+    var oac = new OfflineAudioContext(2, DURATION * sampleRate, sampleRate);
+    var source0 = oac.createBufferSource();
+    var panner = oac.createStereoPanner();
+    source0.buffer = getSpecificFile({ sampleRate: oac.sampleRate, numberOfChannels: 2 });
+    source0.loop = true;
+    panner.pan.setValueAtTime(-0.1, 0.0);
+    panner.pan.setValueAtTime(0.2, 0.5);
+    source0.connect(panner);
+    panner.connect(oac.destination);
+    source0.start(0);
+    return oac;
+  },
+  name: "Stereo Panning with Automation"
+});
+
+registerTestCase({
+  func: function () {
+    var oac = new OfflineAudioContext(2, DURATION * sampleRate, sampleRate);
+    var osc = oac.createOscillator();
+    osc.type = 'sawtooth';
+    var freq = 2000;
+    osc.frequency.value = freq;
+    osc.frequency.linearRampToValueAtTime(20, 10.0);
+    osc.connect(oac.destination);
+    osc.start(0);
+    return oac;
+  },
+  name: "Periodic Wave with Automation"
+});
+
+
+
+if (typeof(window) == "undefined") {
+  exports.benchmarks = benchmarks;
+}
+
diff --git a/third_party/webkit/PerformanceTests/webaudio/index.html b/third_party/webkit/PerformanceTests/webaudio/index.html
new file mode 100644
index 0000000000..e7329cc5ef
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/index.html
@@ -0,0 +1,47 @@
+<html>
+<head>
+<script src=webaudio-bench.js></script>
+<script src=benchmarks.js></script>
+<meta charset="utf-8">
+<style>
+  html {
+    font-family: helvetica, arial;
+  }
+  table {
+    margin: 1em;
+    border-collapse: collapse;
+  }
+  thead {
+    background-color: #aaaaaa;
+  }
+  tr:nth-child(even) {
+    background-color: #eeeeee;
+  }
+  td {
+    border: 1px solid black;
+    text-align: center;
+  }
+  #controls {
+    display: none;
+  }
+  #in-progress {
+    display: none;
+  }
+</style>
+</head>
+<body>
+<div id=loading>
+Loading assets
+<progress></progress>
+</div>
+<div id=controls>
+  <button id=run-all>Run all</button>
+  <div id=in-progress>
+    <progress id=progress-bar> </progress>
+    Benchmark in progress...
+  </div>
+</div>
+<div id=results>
+</div>
+</body>
+</html>
diff --git a/third_party/webkit/PerformanceTests/webaudio/moz.yaml b/third_party/webkit/PerformanceTests/webaudio/moz.yaml
new file mode 100644
index 0000000000..665af6d110
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/moz.yaml
@@ -0,0 +1,27 @@
+schema: 1
+
+bugzilla:
+  product: "Firefox Build System"
+  component: "General"
+
+origin:
+  name: webaudio-benchmark
+  description: Benchmarks for the WebAudio API
+
+  url: https://github.com/padenot/webaudio-benchmark
+
+  release: cb312773f3f8ae6972097f781c058fccdffb4570 (2022-02-28T11:13:41Z).
+  revision: cb312773f3f8ae6972097f781c058fccdffb4570
+
+  license: MPL-2.0
+
+vendoring:
+  url: https://github.com/padenot/webaudio-benchmark
+  source-hosting: github
+  tracking: commit
+
+  exclude:
+    - ".*"
+
+  keep:
+    - LICENSE
diff --git a/third_party/webkit/PerformanceTests/webaudio/think-mono-38000.wav b/third_party/webkit/PerformanceTests/webaudio/think-mono-38000.wav
new file mode 100644
index 0000000000..953127bde5
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/think-mono-38000.wav
diff --git a/third_party/webkit/PerformanceTests/webaudio/think-mono-44100.wav b/third_party/webkit/PerformanceTests/webaudio/think-mono-44100.wav
new file mode 100644
index 0000000000..22c1ad6a04
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/think-mono-44100.wav
diff --git a/third_party/webkit/PerformanceTests/webaudio/think-mono-48000.wav b/third_party/webkit/PerformanceTests/webaudio/think-mono-48000.wav
new file mode 100644
index 0000000000..87be7e5a18
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/think-mono-48000.wav
diff --git a/third_party/webkit/PerformanceTests/webaudio/think-mono.wav b/third_party/webkit/PerformanceTests/webaudio/think-mono.wav
new file mode 100644
index 0000000000..553a1f3b2b
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/think-mono.wav
diff --git a/third_party/webkit/PerformanceTests/webaudio/think-stereo-38000.wav b/third_party/webkit/PerformanceTests/webaudio/think-stereo-38000.wav
new file mode 100644
index 0000000000..ab2a7c4271
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/think-stereo-38000.wav
diff --git a/third_party/webkit/PerformanceTests/webaudio/think-stereo-44100.wav b/third_party/webkit/PerformanceTests/webaudio/think-stereo-44100.wav
new file mode 100644
index 0000000000..017e0cb241
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/think-stereo-44100.wav
diff --git a/third_party/webkit/PerformanceTests/webaudio/think-stereo-48000.wav b/third_party/webkit/PerformanceTests/webaudio/think-stereo-48000.wav
new file mode 100644
index 0000000000..69175381f0
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/webaudio/think-stereo-48000.wav
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);
+}