webkit/media/crypto/ppapi_decryptor.h

   1 // Copyright (c) 2012 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 WEBKIT_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_
   6 #define WEBKIT_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "media/base/decryptor.h"
  13 #include "media/base/video_decoder_config.h"
  14
  15 namespace base {
  16 class MessageLoopProxy;
  17 }
  18
  19 namespace webkit {
  20 namespace ppapi {
  21 class ContentDecryptorDelegate;
  22 class PluginInstance;
  23 }
  24 }
  25
  26 namespace webkit_media {
  27
  28 // PpapiDecryptor implements media::Decryptor and forwards all calls to the
  29 // PluginInstance.
  30 // This class should always be created & destroyed on the main renderer thread.
  31 class PpapiDecryptor : public media::Decryptor {
  32  public:
  33   PpapiDecryptor(
  34       const scoped_refptr<webkit::ppapi::PluginInstance>& plugin_instance,
  35       const media::KeyAddedCB& key_added_cb,
  36       const media::KeyErrorCB& key_error_cb,
  37       const media::KeyMessageCB& key_message_cb,
  38       const media::NeedKeyCB& need_key_cb);
  39   virtual ~PpapiDecryptor();
  40
  41   // media::Decryptor implementation.
  42   virtual bool GenerateKeyRequest(const std::string& key_system,
  43                                   const std::string& type,
  44                                   const uint8* init_data,
  45                                   int init_data_length) OVERRIDE;
  46   virtual void AddKey(const std::string& key_system,
  47                       const uint8* key,
  48                       int key_length,
  49                       const uint8* init_data,
  50                       int init_data_length,
  51                       const std::string& session_id) OVERRIDE;
  52   virtual void CancelKeyRequest(const std::string& key_system,
  53                                 const std::string& session_id) OVERRIDE;
  54   virtual void RegisterNewKeyCB(StreamType stream_type,
  55                                 const NewKeyCB& key_added_cb) OVERRIDE;
  56   virtual void Decrypt(StreamType stream_type,
  57                        const scoped_refptr<media::DecoderBuffer>& encrypted,
  58                        const DecryptCB& decrypt_cb) OVERRIDE;
  59   virtual void CancelDecrypt(StreamType stream_type) OVERRIDE;
  60   virtual void InitializeAudioDecoder(const media::AudioDecoderConfig& config,
  61                                       const DecoderInitCB& init_cb) OVERRIDE;
  62   virtual void InitializeVideoDecoder(const media::VideoDecoderConfig& config,
  63                                       const DecoderInitCB& init_cb) OVERRIDE;
  64   virtual void DecryptAndDecodeAudio(
  65       const scoped_refptr<media::DecoderBuffer>& encrypted,
  66       const AudioDecodeCB& audio_decode_cb) OVERRIDE;
  67   virtual void DecryptAndDecodeVideo(
  68       const scoped_refptr<media::DecoderBuffer>& encrypted,
  69       const VideoDecodeCB& video_decode_cb) OVERRIDE;
  70   virtual void ResetDecoder(StreamType stream_type) OVERRIDE;
  71   virtual void DeinitializeDecoder(StreamType stream_type) OVERRIDE;
  72
  73  private:
  74   void ReportFailureToCallPlugin(const std::string& key_system,
  75                                  const std::string& session_id);
  76
  77   void OnDecoderInitialized(StreamType stream_type, bool success);
  78
  79   // Callbacks for |plugin_cdm_delegate_| to fire key events.
  80   void KeyAdded(const std::string& key_system, const std::string& session_id);
  81   void KeyError(const std::string& key_system,
  82                 const std::string& session_id,
  83                 media::Decryptor::KeyError error_code,
  84                 int system_code);
  85   void KeyMessage(const std::string& key_system,
  86                   const std::string& session_id,
  87                   const std::string& message,
  88                   const std::string& default_url);
  89   void NeedKey(const std::string& key_system,
  90                const std::string& session_id,
  91                const std::string& type,
  92                scoped_ptr<uint8[]> init_data, int init_data_size);
  93
  94   // Hold a reference of the plugin instance to make sure the plugin outlives
  95   // the |plugin_cdm_delegate_|. This is needed because |plugin_cdm_delegate_|
  96   // is owned by the |plugin_instance_|.
  97   scoped_refptr<webkit::ppapi::PluginInstance> plugin_instance_;
  98
  99   // Callbacks for firing key events.
 100   media::KeyAddedCB key_added_cb_;
 101   media::KeyErrorCB key_error_cb_;
 102   media::KeyMessageCB key_message_cb_;
 103   media::NeedKeyCB need_key_cb_;
 104
 105   webkit::ppapi::ContentDecryptorDelegate* plugin_cdm_delegate_;
 106
 107   scoped_refptr<base::MessageLoopProxy> render_loop_proxy_;
 108
 109   DecoderInitCB audio_decoder_init_cb_;
 110   DecoderInitCB video_decoder_init_cb_;
 111   NewKeyCB new_audio_key_cb_;
 112   NewKeyCB new_video_key_cb_;
 113
 114   base::WeakPtrFactory<PpapiDecryptor> weak_ptr_factory_;
 115   base::WeakPtr<PpapiDecryptor> weak_this_;
 116
 117   DISALLOW_COPY_AND_ASSIGN(PpapiDecryptor);
 118 };
 119
 120 }  // namespace webkit_media
 121
 122 #endif  // WEBKIT_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_