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      1 // Copyright 2014 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_FORMATS_WEBM_WEBM_CONTENT_ENCODINGS_H_
      6 #define MEDIA_FORMATS_WEBM_WEBM_CONTENT_ENCODINGS_H_
      7 
      8 #include <string>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/memory/scoped_ptr.h"
     12 #include "media/base/media_export.h"
     13 
     14 namespace media {
     15 
     16 class MEDIA_EXPORT ContentEncoding {
     17  public:
     18   // The following enum definitions are based on the ContentEncoding element
     19   // specified in the Matroska spec.
     20 
     21   static const int kOrderInvalid = -1;
     22 
     23   enum Scope {
     24     kScopeInvalid = 0,
     25     kScopeAllFrameContents = 1,
     26     kScopeTrackPrivateData = 2,
     27     kScopeNextContentEncodingData = 4,
     28     kScopeMax = 7,
     29   };
     30 
     31   enum Type {
     32     kTypeInvalid = -1,
     33     kTypeCompression = 0,
     34     kTypeEncryption = 1,
     35   };
     36 
     37   enum EncryptionAlgo {
     38     kEncAlgoInvalid = -1,
     39     kEncAlgoNotEncrypted = 0,
     40     kEncAlgoDes = 1,
     41     kEncAlgo3des = 2,
     42     kEncAlgoTwofish = 3,
     43     kEncAlgoBlowfish = 4,
     44     kEncAlgoAes = 5,
     45   };
     46 
     47   enum CipherMode {
     48     kCipherModeInvalid = 0,
     49     kCipherModeCtr = 1,
     50   };
     51 
     52   ContentEncoding();
     53   ~ContentEncoding();
     54 
     55   int64 order() const { return order_; }
     56   void set_order(int64 order) { order_ = order; }
     57 
     58   Scope scope() const { return scope_; }
     59   void set_scope(Scope scope) { scope_ = scope; }
     60 
     61   Type type() const { return type_; }
     62   void set_type(Type type) { type_ = type; }
     63 
     64   EncryptionAlgo encryption_algo() const { return encryption_algo_; }
     65   void set_encryption_algo(EncryptionAlgo encryption_algo) {
     66     encryption_algo_ = encryption_algo;
     67   }
     68 
     69   const std::string& encryption_key_id() const { return encryption_key_id_; }
     70   void SetEncryptionKeyId(const uint8* encryption_key_id, int size);
     71 
     72   CipherMode cipher_mode() const { return cipher_mode_; }
     73   void set_cipher_mode(CipherMode mode) { cipher_mode_ = mode; }
     74 
     75  private:
     76   int64 order_;
     77   Scope scope_;
     78   Type type_;
     79   EncryptionAlgo encryption_algo_;
     80   std::string encryption_key_id_;
     81   CipherMode cipher_mode_;
     82 
     83   DISALLOW_COPY_AND_ASSIGN(ContentEncoding);
     84 };
     85 
     86 }  // namespace media
     87 
     88 #endif  // MEDIA_FORMATS_WEBM_WEBM_CONTENT_ENCODINGS_H_
     89