media/blink/null_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_NULL_ENCRYPTED_MEDIA_PLAYER_SUPPORT_H_
   6 #define MEDIA_BLINK_NULL_ENCRYPTED_MEDIA_PLAYER_SUPPORT_H_
   7
   8 #include "media/base/media_export.h"
   9 #include "media/blink/encrypted_media_player_support.h"
  10
  11 namespace media {
  12
  13 // A "null" implementation of the EncryptedMediaPlayerSupport interface
  14 // that indicates all key systems are not supported. This makes sure that
  15 // any attempts to play encrypted content always fail.
  16 class MEDIA_EXPORT NullEncryptedMediaPlayerSupport
  17     : public EncryptedMediaPlayerSupport {
  18  public:
  19   static scoped_ptr<EncryptedMediaPlayerSupport> Create(
  20       blink::WebMediaPlayerClient* client);
  21
  22   ~NullEncryptedMediaPlayerSupport() override;
  23
  24   // Prefixed API methods.
  25   blink::WebMediaPlayer::MediaKeyException GenerateKeyRequest(
  26       blink::WebLocalFrame* frame,
  27       const blink::WebString& key_system,
  28       const unsigned char* init_data,
  29       unsigned init_data_length) override;
  30
  31   blink::WebMediaPlayer::MediaKeyException AddKey(
  32       const blink::WebString& key_system,
  33       const unsigned char* key,
  34       unsigned key_length,
  35       const unsigned char* init_data,
  36       unsigned init_data_length,
  37       const blink::WebString& session_id) override;
  38
  39   blink::WebMediaPlayer::MediaKeyException CancelKeyRequest(
  40       const blink::WebString& key_system,
  41       const blink::WebString& session_id) override;
  42
  43   // Unprefixed API methods.
  44   void SetInitialContentDecryptionModule(
  45       blink::WebContentDecryptionModule* initial_cdm) override;
  46   void SetContentDecryptionModule(
  47       blink::WebContentDecryptionModule* cdm) override;
  48   void SetContentDecryptionModule(
  49       blink::WebContentDecryptionModule* cdm,
  50       blink::WebContentDecryptionModuleResult result) override;
  51
  52   // Callback factory and notification methods used by WebMediaPlayerImpl.
  53
  54   // Creates a callback that Demuxers can use to signal that the content
  55   // requires a key. This method makes sure the callback returned can be safely
  56   // invoked from any thread.
  57   Demuxer::NeedKeyCB CreateNeedKeyCB() override;
  58
  59   // Creates a callback that renderers can use to set decryptor
  60   // ready callback. This method makes sure the callback returned can be safely
  61   // invoked from any thread.
  62   SetDecryptorReadyCB CreateSetDecryptorReadyCB() override;
  63
  64   // Called to inform this object that the media pipeline encountered
  65   // and handled a decryption error.
  66   void OnPipelineDecryptError() override;
  67
  68  private:
  69   NullEncryptedMediaPlayerSupport();
  70
  71   DISALLOW_COPY_AND_ASSIGN(NullEncryptedMediaPlayerSupport);
  72 };
  73
  74 }  // namespace media
  75
  76 #endif  // MEDIA_BLINK_NULL_ENCRYPTED_MEDIA_PLAYER_SUPPORT_H_