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

media/formats/mp2t/ts_section_cat.cc

 // Copyright 2015 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/ts_section_cat.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "media/base/bit_reader.h"
+#include "media/base/encryption_scheme.h"
 #include "media/formats/mp2t/descriptors.h"
 #include "media/formats/mp2t/mp2t_common.h"
 
 namespace media {
 namespace mp2t {
 
-TsSectionCat::TsSectionCat(const RegisterCencPidsCb& register_cenc_ids_cb)
-    : register_cenc_ids_cb_(register_cenc_ids_cb), version_number_(-1) {}
+TsSectionCat::TsSectionCat(
+    const RegisterCencPidsCb& register_cenc_ids_cb,
+    const RegisterEncryptionSchemeCb& register_encryption_scheme_cb)
+    : register_cenc_ids_cb_(register_cenc_ids_cb),
+      register_encryption_scheme_cb_(register_encryption_scheme_cb),
+      version_number_(-1) {}
 
 TsSectionCat::~TsSectionCat() {}
 
 bool TsSectionCat::ParsePsiSection(BitReader* bit_reader) {
   DCHECK(bit_reader);
   // Read the fixed section length.
   int table_id;
   int section_syntax_indicator;
   int dummy_zero;
   int reserved;
@@ skipping 18 matching lines @@
 
   // Perform a few more verifications, including:
   // - Table ID should be 1 for a CAT.
   // - section_syntax_indicator should be one.
   RCHECK(table_id == 0x1);
   RCHECK(section_syntax_indicator);
   RCHECK(!dummy_zero);
 
   Descriptors descriptors;
   int ca_pid, pssh_pid;
+  EncryptionScheme scheme;
   RCHECK(descriptors.Read(bit_reader, section_length - 4));
-  RCHECK(descriptors.HasCADescriptorCenc(&ca_pid, &pssh_pid));
+  RCHECK(descriptors.HasCADescriptorCenc(&ca_pid, &pssh_pid, &scheme));
   int crc32;
   RCHECK(bit_reader->ReadBits(32, &crc32));
 
   // Just ignore the CAT if not applicable yet.
   if (!current_next_indicator) {
     DVLOG(1) << "Not supported: received a CAT not applicable yet";
     return true;
   }
 
   // Ignore the CAT if it hasn't changed.
   if (version_number == version_number_)
     return true;
 
-  // Can now register the PIDs.
+  // Can now register the PIDs and scheme.
   register_cenc_ids_cb_.Run(ca_pid, pssh_pid);
+  register_encryption_scheme_cb_.Run(scheme);
 
   version_number_ = version_number;
 
   return true;
 }
 
 void TsSectionCat::ResetPsiSection() {
   version_number_ = -1;
 }
 
 }  // namespace mp2t
 }  // namespace media