src/media/cdm/ppapi/cdm_adapter.h

   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 MEDIA_CDM_PPAPI_CDM_ADAPTER_H_
   6 #define MEDIA_CDM_PPAPI_CDM_ADAPTER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/compiler_specific.h"
  13 #include "build/build_config.h"
  14 #include "media/cdm/ppapi/api/content_decryption_module.h"
  15 #include "media/cdm/ppapi/cdm_helpers.h"
  16 #include "media/cdm/ppapi/cdm_wrapper.h"
  17 #include "media/cdm/ppapi/linked_ptr.h"
  18 #include "ppapi/c/pp_stdint.h"
  19 #include "ppapi/c/private/pp_content_decryptor.h"
  20 #include "ppapi/cpp/completion_callback.h"
  21 #include "ppapi/cpp/private/content_decryptor_private.h"
  22 #include "ppapi/cpp/var.h"
  23 #include "ppapi/cpp/var_array_buffer.h"
  24 #include "ppapi/utility/completion_callback_factory.h"
  25
  26 #if defined(OS_CHROMEOS)
  27 #include "ppapi/cpp/private/output_protection_private.h"
  28 #include "ppapi/cpp/private/platform_verification.h"
  29 #endif
  30
  31 namespace media {
  32
  33 // GetCdmHostFunc implementation.
  34 void* GetCdmHost(int host_interface_version, void* user_data);
  35
  36 // An adapter class for abstracting away PPAPI interaction and threading for a
  37 // Content Decryption Module (CDM).
  38 class CdmAdapter : public pp::Instance,
  39                    public pp::ContentDecryptor_Private,
  40                    public cdm::Host_1,
  41                    public cdm::Host_2 {
  42  public:
  43   CdmAdapter(PP_Instance instance, pp::Module* module);
  44   virtual ~CdmAdapter();
  45
  46   // pp::Instance implementation.
  47   virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]) {
  48     return true;
  49   }
  50
  51   // PPP_ContentDecryptor_Private implementation.
  52   // Note: Results of calls to these methods must be reported through the
  53   // PPB_ContentDecryptor_Private interface.
  54   // TODO(jrummell): |can_challenge_platform| should be removed.
  55   virtual void Initialize(const std::string& key_system,
  56                           bool can_challenge_platform) OVERRIDE;
  57   virtual void GenerateKeyRequest(const std::string& type,
  58                                   pp::VarArrayBuffer init_data) OVERRIDE;
  59   virtual void AddKey(const std::string& session_id,
  60                       pp::VarArrayBuffer key,
  61                       pp::VarArrayBuffer init_data) OVERRIDE;
  62   virtual void CancelKeyRequest(const std::string& session_id) OVERRIDE;
  63   virtual void Decrypt(
  64       pp::Buffer_Dev encrypted_buffer,
  65       const PP_EncryptedBlockInfo& encrypted_block_info) OVERRIDE;
  66   virtual void InitializeAudioDecoder(
  67       const PP_AudioDecoderConfig& decoder_config,
  68       pp::Buffer_Dev extra_data_buffer) OVERRIDE;
  69   virtual void InitializeVideoDecoder(
  70       const PP_VideoDecoderConfig& decoder_config,
  71       pp::Buffer_Dev extra_data_buffer) OVERRIDE;
  72   virtual void DeinitializeDecoder(PP_DecryptorStreamType decoder_type,
  73                                    uint32_t request_id) OVERRIDE;
  74   virtual void ResetDecoder(PP_DecryptorStreamType decoder_type,
  75                             uint32_t request_id) OVERRIDE;
  76   virtual void DecryptAndDecode(
  77       PP_DecryptorStreamType decoder_type,
  78       pp::Buffer_Dev encrypted_buffer,
  79       const PP_EncryptedBlockInfo& encrypted_block_info) OVERRIDE;
  80
  81   // cdm::Host implementation.
  82   virtual cdm::Buffer* Allocate(uint32_t capacity) OVERRIDE;
  83   virtual void SetTimer(int64_t delay_ms, void* context) OVERRIDE;
  84   virtual double GetCurrentWallTimeInSeconds() OVERRIDE;
  85   virtual void SendKeyMessage(
  86       const char* session_id, uint32_t session_id_length,
  87       const char* message, uint32_t message_length,
  88       const char* default_url, uint32_t default_url_length) OVERRIDE;
  89   virtual void SendKeyError(const char* session_id,
  90                             uint32_t session_id_length,
  91                             cdm::MediaKeyError error_code,
  92                             uint32_t system_code) OVERRIDE;
  93   virtual void GetPrivateData(int32_t* instance,
  94                               GetPrivateInterface* get_interface) OVERRIDE;
  95
  96   // cdm::Host_2 implementation.
  97   virtual void SendPlatformChallenge(
  98       const char* service_id, uint32_t service_id_length,
  99       const char* challenge, uint32_t challenge_length) OVERRIDE;
 100   virtual void EnableOutputProtection(
 101       uint32_t desired_protection_mask) OVERRIDE;
 102   virtual void QueryOutputProtectionStatus() OVERRIDE;
 103   virtual void OnDeferredInitializationDone(
 104       cdm::StreamType stream_type,
 105       cdm::Status decoder_status) OVERRIDE;
 106
 107  private:
 108   struct SessionInfo {
 109     SessionInfo(const std::string& key_system_in,
 110                 const std::string& session_id_in)
 111         : key_system(key_system_in),
 112           session_id(session_id_in) {}
 113     const std::string key_system;
 114     const std::string session_id;
 115   };
 116
 117   typedef linked_ptr<DecryptedBlockImpl> LinkedDecryptedBlock;
 118   typedef linked_ptr<VideoFrameImpl> LinkedVideoFrame;
 119   typedef linked_ptr<AudioFramesImpl> LinkedAudioFrames;
 120
 121   bool CreateCdmInstance(const std::string& key_system);
 122
 123   void SendUnknownKeyError(const std::string& key_system,
 124                            const std::string& session_id);
 125
 126   void SendKeyAdded(const std::string& key_system,
 127                     const std::string& session_id);
 128
 129   // TODO(jrummell): Drop the |key_system| parameter.
 130   void SendKeyErrorInternal(const std::string& key_system,
 131                             const std::string& session_id,
 132                             cdm::MediaKeyError error_code,
 133                             uint32_t system_code);
 134
 135   // <code>PPB_ContentDecryptor_Private</code> dispatchers. These are passed to
 136   // <code>callback_factory_</code> to ensure that calls into
 137   // <code>PPP_ContentDecryptor_Private</code> are asynchronous.
 138   void KeyAdded(int32_t result, const SessionInfo& session_info);
 139   void KeyMessage(int32_t result,
 140                   const SessionInfo& session_info,
 141                   const std::vector<uint8>& message,
 142                   const std::string& default_url);
 143   void KeyError(int32_t result,
 144                 const SessionInfo& session_info,
 145                 cdm::MediaKeyError error_code,
 146                 uint32_t system_code);
 147   void DeliverBlock(int32_t result,
 148                     const cdm::Status& status,
 149                     const LinkedDecryptedBlock& decrypted_block,
 150                     const PP_DecryptTrackingInfo& tracking_info);
 151   void DecoderInitializeDone(int32_t result,
 152                              PP_DecryptorStreamType decoder_type,
 153                              uint32_t request_id,
 154                              bool success);
 155   void DecoderDeinitializeDone(int32_t result,
 156                                PP_DecryptorStreamType decoder_type,
 157                                uint32_t request_id);
 158   void DecoderResetDone(int32_t result,
 159                         PP_DecryptorStreamType decoder_type,
 160                         uint32_t request_id);
 161   void DeliverFrame(int32_t result,
 162                     const cdm::Status& status,
 163                     const LinkedVideoFrame& video_frame,
 164                     const PP_DecryptTrackingInfo& tracking_info);
 165   void DeliverSamples(int32_t result,
 166                       const cdm::Status& status,
 167                       const LinkedAudioFrames& audio_frames,
 168                       const PP_DecryptTrackingInfo& tracking_info);
 169
 170   // Helper for SetTimer().
 171   void TimerExpired(int32_t result, void* context);
 172
 173   bool IsValidVideoFrame(const LinkedVideoFrame& video_frame);
 174
 175
 176 #if defined(OS_CHROMEOS)
 177   void SendPlatformChallengeDone(int32_t result);
 178   void EnableProtectionDone(int32_t result);
 179   void QueryOutputProtectionStatusDone(int32_t result);
 180
 181   pp::OutputProtection_Private output_protection_;
 182   pp::PlatformVerification platform_verification_;
 183
 184   // Since PPAPI doesn't provide handlers for CompletionCallbacks with more than
 185   // one output we need to manage our own.  These values are only read by
 186   // SendPlatformChallengeDone().
 187   pp::Var signed_data_output_;
 188   pp::Var signed_data_signature_output_;
 189   pp::Var platform_key_certificate_output_;
 190   bool challenge_in_progress_;
 191
 192   // Same as above, these are only read by QueryOutputProtectionStatusDone().
 193   uint32_t output_link_mask_;
 194   uint32_t output_protection_mask_;
 195   bool query_output_protection_in_progress_;
 196 #endif
 197
 198   PpbBufferAllocator allocator_;
 199   pp::CompletionCallbackFactory<CdmAdapter> callback_factory_;
 200   linked_ptr<CdmWrapper> cdm_;
 201   std::string key_system_;
 202
 203   // If the CDM returned kDeferredInitialization during InitializeAudioDecoder()
 204   // or InitializeVideoDecoder(), the (Audio|Video)DecoderConfig.request_id is
 205   // saved for the future call to OnDeferredInitializationDone().
 206   bool deferred_initialize_audio_decoder_;
 207   uint32_t deferred_audio_decoder_config_id_;
 208   bool deferred_initialize_video_decoder_;
 209   uint32_t deferred_video_decoder_config_id_;
 210
 211   DISALLOW_COPY_AND_ASSIGN(CdmAdapter);
 212 };
 213
 214 }  // namespace media
 215
 216 #endif  // MEDIA_CDM_PPAPI_CDM_ADAPTER_H_