Read directly from 'senc' box when 'senc' box is present

media/test/pipeline_integration_test.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <utility>
 
@@ skipping 1934 matching lines @@
 
   source.EndOfStream();
 
   Play();
 
   ASSERT_TRUE(WaitUntilOnEnded());
   source.Shutdown();
   Stop();
 }
 
+// 'SAIZ' and 'SAIO' boxes contain redundant information which is already
+// available in 'SENC' box. Although 'SAIZ' and 'SAIO' boxes are required per
+// CENC spec for backward compatibility reasons, but we do not use the two
+// boxes if 'SENC' box is present, so the code should work even if the two
+// boxes are not present.
+TEST_F(PipelineIntegrationTest,
+       MAYBE_EME(EncryptedPlayback_MP4_CENC_SENC_NO_SAIZ_SAIO_Video)) {
+  MockMediaSource source("bear-640x360-v_frag-cenc-senc-no-saiz-saio.mp4",
+                         kMP4Video, kAppendWholeFile);
+  FakeEncryptedMedia encrypted_media(new KeyProvidingApp());
+  EXPECT_EQ(PIPELINE_OK,
+            StartPipelineWithEncryptedMedia(&source, &encrypted_media));
+
+  source.EndOfStream();
+
+  Play();
+
+  ASSERT_TRUE(WaitUntilOnEnded());
+  source.Shutdown();
+  Stop();
+}
+
 TEST_F(PipelineIntegrationTest,
        MAYBE_EME(EncryptedPlayback_MP4_CENC_KeyRotation_Video)) {
   MockMediaSource source("bear-1280x720-v_frag-cenc-key_rotation.mp4",
                          kMP4Video, kAppendWholeFile);
   FakeEncryptedMedia encrypted_media(new RotatingKeyProvidingApp());
   EXPECT_EQ(PIPELINE_OK,
             StartPipelineWithEncryptedMedia(&source, &encrypted_media));
 
   source.EndOfStream();
 
@@ skipping 412 matching lines @@
 
 TEST_F(PipelineIntegrationTest, BasicPlaybackPositiveStartTime) {
   ASSERT_EQ(PIPELINE_OK, Start("nonzero-start-time.webm"));
   Play();
   ASSERT_TRUE(WaitUntilOnEnded());
   ASSERT_EQ(base::TimeDelta::FromMicroseconds(396000),
             demuxer_->GetStartTime());
 }
 
 }  // namespace media