Support encrypted audio stream in demuxer.

media/base/audio_decoder_config.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_BASE_AUDIO_DECODER_CONFIG_H_
 #define MEDIA_BASE_AUDIO_DECODER_CONFIG_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/base/channel_layout.h"
@@ skipping 33 matching lines @@
 class MEDIA_EXPORT AudioDecoderConfig {
  public:
   // Constructs an uninitialized object. Clients should call Initialize() with
   // appropriate values before using.
   AudioDecoderConfig();
 
   // Constructs an initialized object. It is acceptable to pass in NULL for
   // |extra_data|, otherwise the memory is copied.
   AudioDecoderConfig(AudioCodec codec, int bits_per_channel,
                      ChannelLayout channel_layout, int samples_per_second,
-                     const uint8* extra_data, size_t extra_data_size);
+                     const uint8* extra_data, size_t extra_data_size,
+                     bool is_encrypted);
 
   ~AudioDecoderConfig();
 
   // Resets the internal state of this object.
   void Initialize(AudioCodec codec, int bits_per_channel,
                   ChannelLayout channel_layout, int samples_per_second,
                   const uint8* extra_data, size_t extra_data_size,
+                  bool is_encrypted,
                   bool record_stats);
 
   // Deep copies |audio_config|.
   void CopyFrom(const AudioDecoderConfig& audio_config);
 
   // Returns true if this object has appropriate configuration values, false
   // otherwise.
   bool IsValidConfig() const;
 
   // Returns true if all fields in |config| match this config.
   // Note: The contents of |extra_data_| are compared not the raw pointers.
   bool Matches(const AudioDecoderConfig& config) const;
 
   AudioCodec codec() const;
   int bits_per_channel() const;
   ChannelLayout channel_layout() const;
   int samples_per_second() const;
 
   // Optional byte data required to initialize audio decoders such as Vorbis
   // codebooks.
   uint8* extra_data() const;
   size_t extra_data_size() const;
 
+  // Whether the audio stream is potentially encrypted.
+  // Note that in a potentially encrypted audio stream, individual buffers
+  // can be encrypted or not encrypted.
+  bool is_encrypted() const;
+
  private:
   AudioCodec codec_;
   int bits_per_channel_;
   ChannelLayout channel_layout_;
   int samples_per_second_;
 
   scoped_array<uint8> extra_data_;
   size_t extra_data_size_;
 
+  bool is_encrypted_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioDecoderConfig);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_DECODER_CONFIG_H_