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Side by Side Diff: chromecast/media/base/decrypt_context_impl.h

Issue 1257013003: Load CMA backend from shared library (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebase Created 5 years, 4 months ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef CHROMECAST_MEDIA_BASE_DECRYPT_CONTEXT_H_ 5 #ifndef CHROMECAST_MEDIA_BASE_DECRYPT_CONTEXT_IMPL_H_
6 #define CHROMECAST_MEDIA_BASE_DECRYPT_CONTEXT_H_ 6 #define CHROMECAST_MEDIA_BASE_DECRYPT_CONTEXT_IMPL_H_
7 7
8 #include "base/macros.h" 8 #include "base/macros.h"
9 #include "base/memory/ref_counted.h" 9 #include "base/memory/ref_counted.h"
10 #include "chromecast/media/base/key_systems_common.h" 10 #include "chromecast/media/base/key_systems_common.h"
11 #include "chromecast/public/media/decrypt_context.h"
11 12
12 namespace crypto { 13 namespace crypto {
13 class SymmetricKey; 14 class SymmetricKey;
14 } 15 }
15 16
16 namespace chromecast { 17 namespace chromecast {
17 namespace media { 18 namespace media {
18 19
19 // Base class of a decryption context: a decryption context gathers all the 20 // Base class of a decryption context: a decryption context gathers all the
20 // information needed to decrypt frames with a given key id. 21 // information needed to decrypt frames with a given key id.
21 // Each CDM should implement this and add fields needed to fully describe a 22 // Each CDM should implement this and add fields needed to fully describe a
22 // decryption context. 23 // decryption context.
23 // 24 //
24 class DecryptContext : public base::RefCountedThreadSafe<DecryptContext> { 25 class DecryptContextImpl : public DecryptContext {
25 public: 26 public:
26 explicit DecryptContext(CastKeySystem key_system); 27 explicit DecryptContextImpl(CastKeySystem key_system);
28 ~DecryptContextImpl() override;
27 29
28 CastKeySystem key_system() const { return key_system_; } 30 // DecryptContext implementation:
31 CastKeySystem GetKeySystem() override;
32 bool Decrypt(CastDecoderBuffer* buffer,
33 std::vector<uint8_t>* output) override;
29 34
30 // Returns the clear key if available, NULL otherwise. 35 // Returns the clear key if available, NULL otherwise.
31 virtual crypto::SymmetricKey* GetKey() const; 36 virtual crypto::SymmetricKey* GetKey() const;
32 37
33 protected:
34 friend class base::RefCountedThreadSafe<DecryptContext>;
35 virtual ~DecryptContext();
36
37 private: 38 private:
38 CastKeySystem key_system_; 39 CastKeySystem key_system_;
39 40
40 DISALLOW_COPY_AND_ASSIGN(DecryptContext); 41 DISALLOW_COPY_AND_ASSIGN(DecryptContextImpl);
41 }; 42 };
42 43
43 } // namespace media 44 } // namespace media
44 } // namespace chromecast 45 } // namespace chromecast
45 46
46 #endif // CHROMECAST_MEDIA_BASE_DECRYPT_CONTEXT_H_ 47 #endif // CHROMECAST_MEDIA_BASE_DECRYPT_CONTEXT_IMPL_H_
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