media/base/decrypt_config.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/base/decrypt_config.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace media {
  10
  11 DecryptConfig::DecryptConfig(const std::string& key_id,
  12                              const std::string& iv,
  13                              const std::vector<SubsampleEntry>& subsamples)
  14     : key_id_(key_id),
  15       iv_(iv),
  16       subsamples_(subsamples) {
  17   CHECK_GT(key_id.size(), 0u);
  18   CHECK(iv.size() == static_cast<size_t>(DecryptConfig::kDecryptionKeySize) ||
  19         iv.empty());
  20 }
  21
  22 DecryptConfig::~DecryptConfig() {}
  23
  24 bool DecryptConfig::Matches(const DecryptConfig& config) const {
  25   if (key_id() != config.key_id() || iv() != config.iv() ||
  26       subsamples().size() != config.subsamples().size()) {
  27     return false;
  28   }
  29
  30   for (size_t i = 0; i < subsamples().size(); ++i) {
  31     if ((subsamples()[i].clear_bytes != config.subsamples()[i].clear_bytes) ||
  32         (subsamples()[i].cypher_bytes != config.subsamples()[i].cypher_bytes)) {
  33       return false;
  34     }
  35   }
  36
  37   return true;
  38 }
  39
  40 }  // namespace media