1.Use libyuv instead of ffmpeg to do nv12<->yuv420p convertion;2.Use local package to build libyuv(branch stable 2021.4.28 commit eb6e7bb63738e29efd82ea3cf2a115238a89fa51)

thirdparty/libyuv/PRESUBMIT.py

@@ -0,0 +1,49 @@
+# Copyright 2017 The LibYuv Project Authors. All rights reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS. All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+
+def _CommonChecks(input_api, output_api):
+  """Checks common to both upload and commit."""
+  results = []
+  results.extend(input_api.canned_checks.RunPylint(input_api, output_api,
+      files_to_skip=(r'^base[\\\/].*\.py$',
+                     r'^build[\\\/].*\.py$',
+                     r'^buildtools[\\\/].*\.py$',
+                     r'^ios[\\\/].*\.py$',
+                     r'^out.*[\\\/].*\.py$',
+                     r'^testing[\\\/].*\.py$',
+                     r'^third_party[\\\/].*\.py$',
+                     r'^tools[\\\/].*\.py$',
+                     # TODO(kjellander): should arguably be checked.
+                     r'^tools_libyuv[\\\/]valgrind[\\\/].*\.py$',
+                     r'^xcodebuild.*[\\\/].*\.py$',),
+      disabled_warnings=['F0401',  # Failed to import x
+                         'E0611',  # No package y in x
+                         'W0232',  # Class has no __init__ method
+                        ],
+      pylintrc='pylintrc'))
+  return results
+
+
+def CheckChangeOnUpload(input_api, output_api):
+  results = []
+  results.extend(_CommonChecks(input_api, output_api))
+  results.extend(
+      input_api.canned_checks.CheckGNFormatted(input_api, output_api))
+  return results
+
+
+def CheckChangeOnCommit(input_api, output_api):
+  results = []
+  results.extend(_CommonChecks(input_api, output_api))
+  results.extend(input_api.canned_checks.CheckOwners(input_api, output_api))
+  results.extend(input_api.canned_checks.CheckChangeWasUploaded(
+      input_api, output_api))
+  results.extend(input_api.canned_checks.CheckChangeHasDescription(
+      input_api, output_api))
+  return results