content/renderer/media/crypto/encrypted_media_player_support_impl.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 CONTENT_RENDERER_MEDIA_CRYPTO_ENCRYPTED_MEDIA_PLAYER_SUPPORT_IMPL_H_
   6 #define CONTENT_RENDERER_MEDIA_CRYPTO_ENCRYPTED_MEDIA_PLAYER_SUPPORT_IMPL_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/memory/weak_ptr.h"
  12 #include "content/renderer/media/crypto/encrypted_media_player_support.h"
  13 #include "content/renderer/media/crypto/proxy_decryptor.h"
  14
  15 namespace content {
  16
  17 class WebContentDecryptionModuleImpl;
  18
  19 class EncryptedMediaPlayerSupportImpl
  20     : public EncryptedMediaPlayerSupport,
  21       public base::SupportsWeakPtr<EncryptedMediaPlayerSupportImpl> {
  22  public:
  23   explicit EncryptedMediaPlayerSupportImpl(blink::WebMediaPlayerClient* client);
  24   virtual ~EncryptedMediaPlayerSupportImpl();
  25
  26   // EncryptedMediaPlayerSupport implementation.
  27   virtual blink::WebMediaPlayer::MediaKeyException GenerateKeyRequest(
  28       blink::WebLocalFrame* frame,
  29       const blink::WebString& key_system,
  30       const unsigned char* init_data,
  31       unsigned init_data_length)  OVERRIDE;
  32
  33   virtual blink::WebMediaPlayer::MediaKeyException AddKey(
  34       const blink::WebString& key_system,
  35       const unsigned char* key,
  36       unsigned key_length,
  37       const unsigned char* init_data,
  38       unsigned init_data_length,
  39       const blink::WebString& session_id) OVERRIDE;
  40
  41   virtual blink::WebMediaPlayer::MediaKeyException CancelKeyRequest(
  42       const blink::WebString& key_system,
  43       const blink::WebString& session_id) OVERRIDE;
  44
  45   virtual void SetContentDecryptionModule(
  46       blink::WebContentDecryptionModule* cdm) OVERRIDE;
  47   virtual void SetContentDecryptionModule(
  48       blink::WebContentDecryptionModule* cdm,
  49       blink::WebContentDecryptionModuleResult result) OVERRIDE;
  50   virtual void SetContentDecryptionModuleSync(
  51       blink::WebContentDecryptionModule* cdm) OVERRIDE;
  52
  53   virtual media::SetDecryptorReadyCB CreateSetDecryptorReadyCB() OVERRIDE;
  54   virtual media::Demuxer::NeedKeyCB CreateNeedKeyCB() OVERRIDE;
  55
  56   virtual void OnPipelineDecryptError() OVERRIDE;
  57
  58  private:
  59   // Requests that this object notifies when a decryptor is ready through the
  60   // |decryptor_ready_cb| provided.
  61   // If |decryptor_ready_cb| is null, the existing callback will be fired with
  62   // NULL immediately and reset.
  63   void SetDecryptorReadyCB(const media::DecryptorReadyCB& decryptor_ready_cb);
  64
  65   blink::WebMediaPlayer::MediaKeyException GenerateKeyRequestInternal(
  66       blink::WebLocalFrame* frame,
  67       const std::string& key_system,
  68       const unsigned char* init_data,
  69       unsigned init_data_length);
  70
  71   blink::WebMediaPlayer::MediaKeyException AddKeyInternal(
  72       const std::string& key_system,
  73       const unsigned char* key,
  74       unsigned key_length,
  75       const unsigned char* init_data,
  76       unsigned init_data_length,
  77       const std::string& session_id);
  78
  79   blink::WebMediaPlayer::MediaKeyException CancelKeyRequestInternal(
  80     const std::string& key_system,
  81     const std::string& session_id);
  82
  83   void OnNeedKey(const std::string& type,
  84                  const std::vector<uint8>& init_data);
  85
  86   void OnKeyAdded(const std::string& session_id);
  87   void OnKeyError(const std::string& session_id,
  88                   media::MediaKeys::KeyError error_code,
  89                   uint32 system_code);
  90   void OnKeyMessage(const std::string& session_id,
  91                     const std::vector<uint8>& message,
  92                     const GURL& destination_url);
  93
  94   void ContentDecryptionModuleAttached(
  95       blink::WebContentDecryptionModuleResult result,
  96       bool success);
  97
  98   blink::WebMediaPlayerClient* client_;
  99
 100   // The currently selected key system. Empty string means that no key system
 101   // has been selected.
 102   std::string current_key_system_;
 103
 104   // Temporary for EME v0.1. In the future the init data type should be passed
 105   // through GenerateKeyRequest() directly from WebKit.
 106   std::string init_data_type_;
 107
 108   // Manages decryption keys and decrypts encrypted frames.
 109   scoped_ptr<ProxyDecryptor> proxy_decryptor_;
 110
 111   // Non-owned pointer to the CDM. Updated via calls to
 112   // setContentDecryptionModule().
 113   WebContentDecryptionModuleImpl* web_cdm_;
 114
 115   media::DecryptorReadyCB decryptor_ready_cb_;
 116
 117   DISALLOW_COPY_AND_ASSIGN(EncryptedMediaPlayerSupportImpl);
 118 };
 119 }
 120
 121 #endif  // CONTENT_RENDERER_MEDIA_CRYPTO_ENCRYPTED_MEDIA_PLAYER_SUPPORT_IMPL_H_