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_RENDERER_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_ 6 #define CONTENT_RENDERER_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_ 7 8 #include <string> 9 #include <vector> 10 11 #include "base/basictypes.h" 12 #include "base/memory/ref_counted.h" 13 #include "base/memory/weak_ptr.h" 14 #include "content/renderer/media/crypto/pepper_cdm_wrapper.h" 15 #include "media/base/decryptor.h" 16 #include "media/base/media_keys.h" 17 #include "media/base/video_decoder_config.h" 18 19 class GURL; 20 21 namespace base { 22 class MessageLoopProxy; 23 } 24 25 namespace content { 26 class ContentDecryptorDelegate; 27 class PepperPluginInstanceImpl; 28 29 // PpapiDecryptor implements media::MediaKeys and media::Decryptor and forwards 30 // all calls to the PluginInstance. 31 // This class should always be created & destroyed on the main renderer thread. 32 class PpapiDecryptor : public media::MediaKeys, public media::Decryptor { 33 public: 34 static scoped_ptr<PpapiDecryptor> Create( 35 const std::string& key_system, 36 const GURL& security_origin, 37 const CreatePepperCdmCB& create_pepper_cdm_cb, 38 const media::SessionMessageCB& session_message_cb, 39 const media::SessionReadyCB& session_ready_cb, 40 const media::SessionClosedCB& session_closed_cb, 41 const media::SessionErrorCB& session_error_cb); 42 43 virtual ~PpapiDecryptor(); 44 45 // media::MediaKeys implementation. 46 virtual void CreateSession( 47 const std::string& init_data_type, 48 const uint8* init_data, 49 int init_data_length, 50 SessionType session_type, 51 scoped_ptr<media::NewSessionCdmPromise> promise) OVERRIDE; 52 virtual void LoadSession( 53 const std::string& web_session_id, 54 scoped_ptr<media::NewSessionCdmPromise> promise) OVERRIDE; 55 virtual void UpdateSession( 56 const std::string& web_session_id, 57 const uint8* response, 58 int response_length, 59 scoped_ptr<media::SimpleCdmPromise> promise) OVERRIDE; 60 virtual void ReleaseSession( 61 const std::string& web_session_id, 62 scoped_ptr<media::SimpleCdmPromise> promise) OVERRIDE; 63 virtual Decryptor* GetDecryptor() OVERRIDE; 64 65 // media::Decryptor implementation. 66 virtual void RegisterNewKeyCB(StreamType stream_type, 67 const NewKeyCB& key_added_cb) OVERRIDE; 68 virtual void Decrypt(StreamType stream_type, 69 const scoped_refptr<media::DecoderBuffer>& encrypted, 70 const DecryptCB& decrypt_cb) OVERRIDE; 71 virtual void CancelDecrypt(StreamType stream_type) OVERRIDE; 72 virtual void InitializeAudioDecoder(const media::AudioDecoderConfig& config, 73 const DecoderInitCB& init_cb) OVERRIDE; 74 virtual void InitializeVideoDecoder(const media::VideoDecoderConfig& config, 75 const DecoderInitCB& init_cb) OVERRIDE; 76 virtual void DecryptAndDecodeAudio( 77 const scoped_refptr<media::DecoderBuffer>& encrypted, 78 const AudioDecodeCB& audio_decode_cb) OVERRIDE; 79 virtual void DecryptAndDecodeVideo( 80 const scoped_refptr<media::DecoderBuffer>& encrypted, 81 const VideoDecodeCB& video_decode_cb) OVERRIDE; 82 virtual void ResetDecoder(StreamType stream_type) OVERRIDE; 83 virtual void DeinitializeDecoder(StreamType stream_type) OVERRIDE; 84 85 private: 86 PpapiDecryptor(const std::string& key_system, 87 scoped_ptr<PepperCdmWrapper> pepper_cdm_wrapper, 88 const media::SessionMessageCB& session_message_cb, 89 const media::SessionReadyCB& session_ready_cb, 90 const media::SessionClosedCB& session_closed_cb, 91 const media::SessionErrorCB& session_error_cb); 92 93 void OnDecoderInitialized(StreamType stream_type, bool success); 94 95 // Callbacks for |plugin_cdm_delegate_| to fire session events. 96 void OnSessionMessage(const std::string& web_session_id, 97 const std::vector<uint8>& message, 98 const GURL& destination_url); 99 void OnSessionReady(const std::string& web_session_id); 100 void OnSessionClosed(const std::string& web_session_id); 101 void OnSessionError(const std::string& web_session_id, 102 MediaKeys::Exception exception_code, 103 uint32 system_code, 104 const std::string& error_description); 105 106 // On a successful Update() or SessionReady event, trigger playback to resume. 107 void ResumePlayback(); 108 109 // Callback to notify that a fatal error happened in |plugin_cdm_delegate_|. 110 // The error is terminal and |plugin_cdm_delegate_| should not be used after 111 // this call. 112 void OnFatalPluginError(); 113 114 ContentDecryptorDelegate* CdmDelegate(); 115 116 // Hold a reference of the Pepper CDM wrapper to make sure the plugin lives 117 // as long as needed. 118 scoped_ptr<PepperCdmWrapper> pepper_cdm_wrapper_; 119 120 // Callbacks for firing session events. 121 media::SessionMessageCB session_message_cb_; 122 media::SessionReadyCB session_ready_cb_; 123 media::SessionClosedCB session_closed_cb_; 124 media::SessionErrorCB session_error_cb_; 125 126 scoped_refptr<base::MessageLoopProxy> render_loop_proxy_; 127 128 DecoderInitCB audio_decoder_init_cb_; 129 DecoderInitCB video_decoder_init_cb_; 130 NewKeyCB new_audio_key_cb_; 131 NewKeyCB new_video_key_cb_; 132 133 // NOTE: Weak pointers must be invalidated before all other member variables. 134 base::WeakPtrFactory<PpapiDecryptor> weak_ptr_factory_; 135 136 DISALLOW_COPY_AND_ASSIGN(PpapiDecryptor); 137 }; 138 139 } // namespace content 140 141 #endif // CONTENT_RENDERER_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_ 142
