key_system_info.h revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9
1// Copyright 2013 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#ifndef CONTENT_PUBLIC_RENDERER_KEY_SYSTEM_INFO_H_ 6#define CONTENT_PUBLIC_RENDERER_KEY_SYSTEM_INFO_H_ 7 8#include <string> 9#include <utility> 10#include <vector> 11 12#include "base/basictypes.h" 13#include "content/common/content_export.h" 14 15// Definitions: 16// * Key system 17// https://dvcs.w3.org/hg/html-media/raw-file/default/encrypted-media/encrypted-media.html#key-system 18// * Concrete key system 19// A key system string that can be instantiated, such as 20// via the MediaKeys constructor. Examples include "org.w3.clearkey" and 21// "com.widevine.alpha". 22// * Abstract key system 23// A key system string that cannot be instantiated like a concrete key system 24// but is otherwise useful, such as in discovery using isTypeSupported(). 25// * Parent key system 26// A key system string that is one level up from the child key system. It may 27// be an abstract key system. 28// As an example, "com.example" is the parent of "com.example.foo". 29 30namespace content { 31 32// Contains information about an EME key system as well as how to instantiate 33// the corresponding CDM. 34struct CONTENT_EXPORT KeySystemInfo { 35 // Represents container-codec combinations. The second string may contain zero 36 // or more codecs separated by commas. 37 typedef std::pair<std::string, std::string> ContainerCodecsPair; 38 39 explicit KeySystemInfo(const std::string& key_system); 40 ~KeySystemInfo(); 41 42 std::string key_system; 43 44 // Specifies container and codec combinations supported by |key_system|. 45 // Multiple codecs may be listed for each container. 46 // In all cases, the container without a codec is also always supported. 47 std::vector<ContainerCodecsPair> supported_types; 48 49 // A hierarchical parent for |key_system|. This value can be used to check 50 // supported types but cannot be used to instantiate a MediaKeys object. 51 // Only one parent key system is currently supported per concrete key system. 52 std::string parent_key_system; 53 54 // The following indicate how the corresponding CDM should be instantiated. 55 bool use_aes_decryptor; 56#if defined(ENABLE_PEPPER_CDMS) 57 std::string pepper_type; 58#endif 59}; 60 61} // namespace content 62 63#endif // CONTENT_PUBLIC_RENDERER_KEY_SYSTEM_INFO_H_ 64