Declare intent to use sample-aes later in the stream.

media/formats/mp2t/mp2t_stream_parser_unittest.cc

 // Copyright 2014 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 "media/formats/mp2t/mp2t_stream_parser.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 486 matching lines @@
   }
   audio_encryption_scheme = current_audio_config_.encryption_scheme();
   EXPECT_FALSE(audio_encryption_scheme.is_encrypted());
   for (size_t i = 0; i + 1 < audio_buffer_capture_.size(); i++) {
     const auto& buffer = audio_buffer_capture_[i];
     std::string unencrypted_audio_buffer(
         reinterpret_cast<const char*>(buffer->data()), buffer->data_size());
     EXPECT_EQ(decrypted_audio_buffers[i], unencrypted_audio_buffer);
   }
 }
+
+TEST_F(Mp2tStreamParserTest, PrepareForHLSSampleAES) {
+  InitializeParser();
+  ParseMpeg2TsFile("bear-1280x720-hls-with-CAT.bin", 2048);
+  parser_->Flush();
+  EncryptionScheme video_encryption_scheme =
+      current_video_config_.encryption_scheme();
+  EXPECT_TRUE(video_encryption_scheme.is_encrypted());
+  EncryptionScheme audio_encryption_scheme =
+      current_audio_config_.encryption_scheme();
+  EXPECT_TRUE(audio_encryption_scheme.is_encrypted());
+}
+
 #endif
 
 }  // namespace mp2t
 }  // namespace media