1 files changed, 121 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webcodecs/reconfiguring-encoder.https.any.js b/testing/web-platform/tests/webcodecs/reconfiguring-encoder.https.any.js
new file mode 100644
index 0000000000..7bc7402b01
--- /dev/null
+++ b/testing/web-platform/tests/webcodecs/reconfiguring-encoder.https.any.js
@@ -0,0 +1,121 @@
+// META: global=window,dedicatedworker
+// META: script=/webcodecs/video-encoder-utils.js
+// META: variant=?av1
+// META: variant=?vp8
+// META: variant=?vp9_p0
+// META: variant=?vp9_p2
+// META: variant=?h264_avc
+// META: variant=?h264_annexb
+
+var ENCODER_CONFIG = null;
+promise_setup(async () => {
+  const config = {
+    '?av1': {codec: 'av01.0.04M.08'},
+    '?vp8': {codec: 'vp8'},
+    '?vp9_p0': {codec: 'vp09.00.10.08'},
+    '?vp9_p2': {codec: 'vp09.02.10.10'},
+    '?h264_avc': {codec: 'avc1.42001E', avc: {format: 'avc'}},
+    '?h264_annexb': {codec: 'avc1.42001E', avc: {format: 'annexb'}}
+  }[location.search];
+  config.hardwareAcceleration = 'prefer-software';
+  config.bitrateMode = "constant";
+  config.scalabilityMode = "L1T2";
+  config.framerate = 30;
+  ENCODER_CONFIG = config;
+});
+
+promise_test(async t => {
+  let original_w = 800;
+  let original_h = 600;
+  let original_bitrate = 3_000_000;
+
+  let new_w = 640;
+  let new_h = 480;
+  let new_bitrate = 2_000_000;
+
+  let next_ts = 0
+  let reconf_ts = 0;
+  let frames_to_encode = 16;
+  let before_reconf_frames = 0;
+  let after_reconf_frames = 0;
+
+  let process_video_chunk = function (chunk, metadata) {
+    let config = metadata.decoderConfig;
+    var data = new Uint8Array(chunk.data);
+    assert_greater_than_equal(data.length, 0);
+    let after_reconf = (reconf_ts != 0) && (chunk.timestamp >= reconf_ts);
+    if (after_reconf) {
+      after_reconf_frames++;
+      if (config) {
+        assert_equals(config.codedWidth, new_w);
+        assert_equals(config.codedHeight, new_h);
+      }
+    } else {
+      before_reconf_frames++;
+      if (config) {
+        assert_equals(config.codedWidth, original_w);
+        assert_equals(config.codedHeight, original_h);
+      }
+    }
+  };
+
+  const init = {
+    output: (chunk, md) => {
+      try {
+        process_video_chunk(chunk, md);
+      } catch (e) {
+        assert_unreached(e.message);
+      }
+    },
+    error: (e) => {
+      assert_unreached(e.message);
+    },
+  };
+  const params = {
+    ...ENCODER_CONFIG,
+    width: original_w,
+    height: original_h,
+    bitrate: original_bitrate,
+  };
+  await checkEncoderSupport(t, params);
+
+  let encoder = new VideoEncoder(init);
+  encoder.configure(params);
+
+  // Remove this flush after crbug.com/1275789 is fixed
+  await encoder.flush();
+
+  // Encode |frames_to_encode| frames with original settings
+  for (let i = 0; i < frames_to_encode; i++) {
+    var frame = createFrame(original_w, original_h, next_ts++);
+    encoder.encode(frame, {});
+    frame.close();
+  }
+
+  params.width = new_w;
+  params.height = new_h;
+  params.bitrate = new_bitrate;
+
+  // Reconfigure encoder and run |frames_to_encode| frames with new settings
+  encoder.configure(params);
+  reconf_ts = next_ts;
+
+  for (let i = 0; i < frames_to_encode; i++) {
+    var frame = createFrame(new_w, new_h, next_ts++);
+    encoder.encode(frame, {});
+    frame.close();
+  }
+
+  await encoder.flush();
+
+  // Configure back to original config
+  params.width = original_w;
+  params.height = original_h;
+  params.bitrate = original_bitrate;
+  encoder.configure(params);
+  await encoder.flush();
+
+  encoder.close();
+  assert_equals(before_reconf_frames, frames_to_encode);
+  assert_equals(after_reconf_frames, frames_to_encode);
+}, "Reconfiguring encoder");