third_party/WebKit/Source/modules/encryptedmedia/EncryptedMediaUtils.cpp

// 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 "modules/encryptedmedia/EncryptedMediaUtils.h"

namespace blink {

namespace {

const char kTemporary[] = "temporary";
const char kPersistentLicense[] = "persistent-license";

}  // namespace

WebEncryptedMediaInitDataType EncryptedMediaUtils::convertToInitDataType(
    const String& initDataType) {
  if (initDataType == "cenc")
    return WebEncryptedMediaInitDataType::Cenc;
  if (initDataType == "keyids")
    return WebEncryptedMediaInitDataType::Keyids;
  if (initDataType == "webm")
    return WebEncryptedMediaInitDataType::Webm;

  // |initDataType| is not restricted in the idl, so anything is possible.
  return WebEncryptedMediaInitDataType::Unknown;
}

String EncryptedMediaUtils::convertFromInitDataType(
    WebEncryptedMediaInitDataType initDataType) {
  switch (initDataType) {
    case WebEncryptedMediaInitDataType::Cenc:
      return "cenc";
    case WebEncryptedMediaInitDataType::Keyids:
      return "keyids";
    case WebEncryptedMediaInitDataType::Webm:
      return "webm";
    case WebEncryptedMediaInitDataType::Unknown:
      // Chromium should not use Unknown, but we use it in Blink when the
      // actual value has been blocked for non-same-origin or mixed content.
      return String();
  }

  NOTREACHED();
  return String();
}

WebEncryptedMediaSessionType EncryptedMediaUtils::convertToSessionType(
    const String& sessionType) {
  if (sessionType == kTemporary)
    return WebEncryptedMediaSessionType::Temporary;
  if (sessionType == kPersistentLicense)
    return WebEncryptedMediaSessionType::PersistentLicense;

  // |sessionType| is not restricted in the idl, so anything is possible.
  return WebEncryptedMediaSessionType::Unknown;
}

String EncryptedMediaUtils::convertFromSessionType(
    WebEncryptedMediaSessionType sessionType) {
  switch (sessionType) {
    case WebEncryptedMediaSessionType::Temporary:
      return kTemporary;
    case WebEncryptedMediaSessionType::PersistentLicense:
      return kPersistentLicense;
    // FIXME: Remove once removed from Chromium (crbug.com/448888).
    case WebEncryptedMediaSessionType::PersistentReleaseMessage:
    case WebEncryptedMediaSessionType::Unknown:
      // Chromium should not use Unknown.
      NOTREACHED();
      return String();
  }

  NOTREACHED();
  return String();
}

}  // namespace blink