Decryptors can report kNoKey to WebMediaPlayer

media/filters/decrypting_audio_decoder.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_
 #define MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 21 matching lines @@
  public:
   DecryptingAudioDecoder(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       const SetDecryptorReadyCB& set_decryptor_ready_cb);
   ~DecryptingAudioDecoder() override;
 
   // AudioDecoder implementation.
   std::string GetDisplayName() const override;
   void Initialize(const AudioDecoderConfig& config,
                   const PipelineStatusCB& status_cb,
-                  const OutputCB& output_cb) override;
+                  const OutputCB& output_cb,
+                  const base::Closure& waiting_for_encryption_key_cb) override;
   void Decode(const scoped_refptr<DecoderBuffer>& buffer,
               const DecodeCB& decode_cb) override;
   void Reset(const base::Closure& closure) override;
 
  private:
   // For a detailed state diagram please see this link: http://goo.gl/8jAok
   // TODO(xhwang): Add a ASCII state diagram in this file after this class
   // stabilizes.
   // TODO(xhwang): Update this diagram for DecryptingAudioDecoder.
   enum State {
@@ skipping 36 matching lines @@
   void ProcessDecodedFrames(const Decryptor::AudioFrames& frames);
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   State state_;
 
   PipelineStatusCB init_cb_;
   OutputCB output_cb_;
   DecodeCB decode_cb_;
   base::Closure reset_cb_;
+  base::Closure waiting_for_encryption_key_cb_;
 
   // The current decoder configuration.
   AudioDecoderConfig config_;
 
   // Callback to request/cancel decryptor creation notification.
   SetDecryptorReadyCB set_decryptor_ready_cb_;
 
   Decryptor* decryptor_;
 
   // The buffer that needs decrypting/decoding.
@@ skipping 10 matching lines @@
 
   base::WeakPtr<DecryptingAudioDecoder> weak_this_;
   base::WeakPtrFactory<DecryptingAudioDecoder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DecryptingAudioDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_