media/blink/encrypted_media_player_support.h

   1 // Copyright 2014 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 MEDIA_BLINK_ENCRYPTED_MEDIA_PLAYER_SUPPORT_H_
   6 #define MEDIA_BLINK_ENCRYPTED_MEDIA_PLAYER_SUPPORT_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/callback.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "media/base/cdm_context.h"
  15 #include "media/base/cdm_factory.h"
  16 #include "media/base/demuxer.h"
  17 #include "media/cdm/proxy_decryptor.h"
  18 #include "third_party/WebKit/public/platform/WebContentDecryptionModuleResult.h"
  19 #include "third_party/WebKit/public/platform/WebMediaPlayer.h"
  20
  21 namespace blink {
  22 class WebContentDecryptionModule;
  23 class WebLocalFrame;
  24 class WebMediaPlayerClient;
  25 class WebString;
  26 }
  27
  28 namespace media {
  29
  30 class WebContentDecryptionModuleImpl;
  31
  32 // Provides support to prefixed EME implementation.
  33 // Do NOT add unprefixed EME functionality to this class!
  34 // TODO(xhwang): When deprecating prefixed EME support, drop this whole file.
  35 class EncryptedMediaPlayerSupport
  36     : public base::SupportsWeakPtr<EncryptedMediaPlayerSupport> {
  37  public:
  38   typedef base::Callback<void(CdmContext*, const CdmAttachedCB&)>
  39       SetCdmContextCB;
  40
  41   EncryptedMediaPlayerSupport(scoped_ptr<CdmFactory> cdm_factory,
  42                               blink::WebMediaPlayerClient* client,
  43                               const SetCdmContextCB& set_cdm_context_cb);
  44   ~EncryptedMediaPlayerSupport();
  45
  46   blink::WebMediaPlayer::MediaKeyException GenerateKeyRequest(
  47       blink::WebLocalFrame* frame,
  48       const blink::WebString& key_system,
  49       const unsigned char* init_data,
  50       unsigned init_data_length);
  51
  52   blink::WebMediaPlayer::MediaKeyException AddKey(
  53       const blink::WebString& key_system,
  54       const unsigned char* key,
  55       unsigned key_length,
  56       const unsigned char* init_data,
  57       unsigned init_data_length,
  58       const blink::WebString& session_id);
  59
  60   blink::WebMediaPlayer::MediaKeyException CancelKeyRequest(
  61       const blink::WebString& key_system,
  62       const blink::WebString& session_id);
  63
  64   void SetInitDataType(const std::string& init_data_type);
  65
  66   void OnPipelineDecryptError();
  67
  68  private:
  69   blink::WebMediaPlayer::MediaKeyException GenerateKeyRequestInternal(
  70       blink::WebLocalFrame* frame,
  71       const std::string& key_system,
  72       const unsigned char* init_data,
  73       unsigned init_data_length);
  74
  75   blink::WebMediaPlayer::MediaKeyException AddKeyInternal(
  76       const std::string& key_system,
  77       const unsigned char* key,
  78       unsigned key_length,
  79       const unsigned char* init_data,
  80       unsigned init_data_length,
  81       const std::string& session_id);
  82
  83   blink::WebMediaPlayer::MediaKeyException CancelKeyRequestInternal(
  84     const std::string& key_system,
  85     const std::string& session_id);
  86
  87   void OnKeyAdded(const std::string& session_id);
  88   void OnKeyError(const std::string& session_id,
  89                   MediaKeys::KeyError error_code,
  90                   uint32 system_code);
  91   void OnKeyMessage(const std::string& session_id,
  92                     const std::vector<uint8>& message,
  93                     const GURL& destination_url);
  94
  95   scoped_ptr<CdmFactory> cdm_factory_;
  96
  97   blink::WebMediaPlayerClient* client_;
  98
  99   // The currently selected key system. Empty string means that no key system
 100   // has been selected.
 101   std::string current_key_system_;
 102
 103   // We assume all streams are from the same container, thus have the same
 104   // init data type.
 105   std::string init_data_type_;
 106
 107   SetCdmContextCB set_cdm_context_cb_;
 108
 109   // Manages decryption keys and decrypts encrypted frames.
 110   scoped_ptr<ProxyDecryptor> proxy_decryptor_;
 111
 112   DISALLOW_COPY_AND_ASSIGN(EncryptedMediaPlayerSupport);
 113 };
 114
 115 }  // namespace media
 116
 117 #endif  // MEDIA_BLINK_ENCRYPTED_MEDIA_PLAYER_SUPPORT_H_