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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_CMA_IPC_MEDIA_MESSAGE_H_ | 5 #ifndef CHROMECAST_MEDIA_CMA_IPC_MEDIA_MESSAGE_H_ |
6 #define CHROMECAST_MEDIA_CMA_IPC_MEDIA_MESSAGE_H_ | 6 #define CHROMECAST_MEDIA_CMA_IPC_MEDIA_MESSAGE_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
| 11 #include <memory> |
| 12 |
11 #include "base/callback.h" | 13 #include "base/callback.h" |
12 #include "base/macros.h" | 14 #include "base/macros.h" |
13 #include "base/memory/scoped_ptr.h" | |
14 | 15 |
15 namespace chromecast { | 16 namespace chromecast { |
16 namespace media { | 17 namespace media { |
17 class MediaMemoryChunk; | 18 class MediaMemoryChunk; |
18 | 19 |
19 // MediaMessage - | 20 // MediaMessage - |
20 // Represents a media message, including: | 21 // Represents a media message, including: |
21 // - a message header that gives for example the message size or its type, | 22 // - a message header that gives for example the message size or its type, |
22 // - the content of the message, | 23 // - the content of the message, |
23 // - and some possible padding if the content does not occupy the whole | 24 // - and some possible padding if the content does not occupy the whole |
24 // reserved space. | 25 // reserved space. |
25 // | 26 // |
26 class MediaMessage { | 27 class MediaMessage { |
27 public: | 28 public: |
28 // Memory allocator: given a number of bytes to allocate, | 29 // Memory allocator: given a number of bytes to allocate, |
29 // return the pointer to the allocated block if successful | 30 // return the pointer to the allocated block if successful |
30 // or NULL if allocation failed. | 31 // or NULL if allocation failed. |
31 typedef base::Callback<scoped_ptr<MediaMemoryChunk>(size_t)> | 32 typedef base::Callback<std::unique_ptr<MediaMemoryChunk>(size_t)> |
32 MemoryAllocatorCB; | 33 MemoryAllocatorCB; |
33 | 34 |
34 // Creates a message with no associated memory for its content, i.e. | 35 // Creates a message with no associated memory for its content, i.e. |
35 // each write on this message is a dummy operation. | 36 // each write on this message is a dummy operation. |
36 // This type of message can be useful to calculate first the size of the | 37 // This type of message can be useful to calculate first the size of the |
37 // message, before allocating the real message. | 38 // message, before allocating the real message. |
38 static scoped_ptr<MediaMessage> CreateDummyMessage(uint32_t type); | 39 static std::unique_ptr<MediaMessage> CreateDummyMessage(uint32_t type); |
39 | 40 |
40 // Creates a message with a capacity of at least |msg_content_capacity| | 41 // Creates a message with a capacity of at least |msg_content_capacity| |
41 // bytes. The actual content size can be smaller than its capacity. | 42 // bytes. The actual content size can be smaller than its capacity. |
42 // The message can be populated with some Write functions. | 43 // The message can be populated with some Write functions. |
43 static scoped_ptr<MediaMessage> CreateMessage( | 44 static std::unique_ptr<MediaMessage> CreateMessage( |
44 uint32_t type, | 45 uint32_t type, |
45 const MemoryAllocatorCB& memory_allocator, | 46 const MemoryAllocatorCB& memory_allocator, |
46 size_t msg_content_capacity); | 47 size_t msg_content_capacity); |
47 | 48 |
48 // Creates a message of type |type| whose serialized structure is stored | 49 // Creates a message of type |type| whose serialized structure is stored |
49 // in |mem|. | 50 // in |mem|. |
50 static scoped_ptr<MediaMessage> CreateMessage( | 51 static std::unique_ptr<MediaMessage> CreateMessage( |
51 uint32_t type, | 52 uint32_t type, |
52 scoped_ptr<MediaMemoryChunk> mem); | 53 std::unique_ptr<MediaMemoryChunk> mem); |
53 | 54 |
54 // Creates a message from a memory area which already contains | 55 // Creates a message from a memory area which already contains |
55 // the serialized structure of the message. | 56 // the serialized structure of the message. |
56 // Only Read functions can be invoked on this type of message. | 57 // Only Read functions can be invoked on this type of message. |
57 static scoped_ptr<MediaMessage> MapMessage( | 58 static std::unique_ptr<MediaMessage> MapMessage( |
58 scoped_ptr<MediaMemoryChunk> mem); | 59 std::unique_ptr<MediaMemoryChunk> mem); |
59 | 60 |
60 // Return the minimum size of a message. | 61 // Return the minimum size of a message. |
61 static size_t minimum_msg_size() { | 62 static size_t minimum_msg_size() { |
62 return offsetof(SerializedMsg, content); | 63 return offsetof(SerializedMsg, content); |
63 } | 64 } |
64 | 65 |
65 ~MediaMessage(); | 66 ~MediaMessage(); |
66 | 67 |
67 // Indicate whether the underlying serialized structure of the message is | 68 // Indicate whether the underlying serialized structure of the message is |
68 // available. | 69 // available. |
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105 // and write it to |dst|. | 106 // and write it to |dst|. |
106 bool ReadBuffer(void* dst, size_t size); | 107 bool ReadBuffer(void* dst, size_t size); |
107 | 108 |
108 // Return a pointer to a buffer of size |size|. | 109 // Return a pointer to a buffer of size |size|. |
109 // Return NULL if not successful. | 110 // Return NULL if not successful. |
110 const void* GetBuffer(size_t size); | 111 const void* GetBuffer(size_t size); |
111 void* GetWritableBuffer(size_t size); | 112 void* GetWritableBuffer(size_t size); |
112 | 113 |
113 private: | 114 private: |
114 MediaMessage(uint32_t type, size_t msg_size); | 115 MediaMessage(uint32_t type, size_t msg_size); |
115 MediaMessage(uint32_t type, scoped_ptr<MediaMemoryChunk> memory); | 116 MediaMessage(uint32_t type, std::unique_ptr<MediaMemoryChunk> memory); |
116 MediaMessage(scoped_ptr<MediaMemoryChunk> memory); | 117 MediaMessage(std::unique_ptr<MediaMemoryChunk> memory); |
117 | 118 |
118 struct Header { | 119 struct Header { |
119 // Total size of the message (including both header & content). | 120 // Total size of the message (including both header & content). |
120 uint32_t size; | 121 uint32_t size; |
121 // Indicate the message type. | 122 // Indicate the message type. |
122 uint32_t type; | 123 uint32_t type; |
123 // Actual size of the content in the message. | 124 // Actual size of the content in the message. |
124 uint32_t content_size; | 125 uint32_t content_size; |
125 }; | 126 }; |
126 | 127 |
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144 // issues. | 145 // issues. |
145 SerializedMsg cached_msg_; | 146 SerializedMsg cached_msg_; |
146 Header* const cached_header_; | 147 Header* const cached_header_; |
147 | 148 |
148 SerializedMsg* msg_; | 149 SerializedMsg* msg_; |
149 SerializedMsg* msg_read_only_; | 150 SerializedMsg* msg_read_only_; |
150 | 151 |
151 // Memory allocated to store the underlying serialized structure into memory. | 152 // Memory allocated to store the underlying serialized structure into memory. |
152 // Note: a dummy message has no underlying serialized structure: | 153 // Note: a dummy message has no underlying serialized structure: |
153 // |mem_| is a null pointer in that case. | 154 // |mem_| is a null pointer in that case. |
154 scoped_ptr<MediaMemoryChunk> mem_; | 155 std::unique_ptr<MediaMemoryChunk> mem_; |
155 | 156 |
156 // Read iterator into the message. | 157 // Read iterator into the message. |
157 size_t rd_offset_; | 158 size_t rd_offset_; |
158 | 159 |
159 DISALLOW_COPY_AND_ASSIGN(MediaMessage); | 160 DISALLOW_COPY_AND_ASSIGN(MediaMessage); |
160 }; | 161 }; |
161 | 162 |
162 } // namespace media | 163 } // namespace media |
163 } // namespace chromecast | 164 } // namespace chromecast |
164 | 165 |
165 #endif | 166 #endif |
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