OLD | NEW |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 MEDIA_BASE_BIT_READER_H_ | 5 #ifndef MEDIA_BASE_BIT_READER_H_ |
6 #define MEDIA_BASE_BIT_READER_H_ | 6 #define MEDIA_BASE_BIT_READER_H_ |
7 | 7 |
8 #include "base/basictypes.h" | |
9 #include "base/compiler_specific.h" | 8 #include "base/compiler_specific.h" |
10 #include "base/memory/scoped_ptr.h" | 9 #include "base/memory/scoped_ptr.h" |
11 #include "media/base/bit_reader_core.h" | 10 #include "media/base/bit_reader_core.h" |
12 #include "media/base/media_export.h" | 11 #include "media/base/media_export.h" |
13 | 12 |
14 namespace media { | 13 namespace media { |
15 | 14 |
16 class MEDIA_EXPORT BitReader | 15 class MEDIA_EXPORT BitReader |
17 : NON_EXPORTED_BASE(private BitReaderCore::ByteStreamProvider) { | 16 : NON_EXPORTED_BASE(private BitReaderCore::ByteStreamProvider) { |
18 public: | 17 public: |
19 // Initialize the reader to start reading at |data|, |size| being size | 18 // Initialize the reader to start reading at |data|, |size| being size |
20 // of |data| in bytes. | 19 // of |data| in bytes. |
21 BitReader(const uint8* data, int size); | 20 BitReader(const uint8_t* data, int size); |
22 ~BitReader() override; | 21 ~BitReader() override; |
23 | 22 |
24 template<typename T> bool ReadBits(int num_bits, T* out) { | 23 template<typename T> bool ReadBits(int num_bits, T* out) { |
25 return bit_reader_core_.ReadBits(num_bits, out); | 24 return bit_reader_core_.ReadBits(num_bits, out); |
26 } | 25 } |
27 | 26 |
28 bool ReadFlag(bool* flag) { | 27 bool ReadFlag(bool* flag) { |
29 return bit_reader_core_.ReadFlag(flag); | 28 return bit_reader_core_.ReadFlag(flag); |
30 } | 29 } |
31 | 30 |
32 bool SkipBits(int num_bits) { | 31 bool SkipBits(int num_bits) { |
33 return bit_reader_core_.SkipBits(num_bits); | 32 return bit_reader_core_.SkipBits(num_bits); |
34 } | 33 } |
35 | 34 |
36 int bits_available() const { | 35 int bits_available() const { |
37 return initial_size_ * 8 - bits_read(); | 36 return initial_size_ * 8 - bits_read(); |
38 } | 37 } |
39 | 38 |
40 int bits_read() const { | 39 int bits_read() const { |
41 return bit_reader_core_.bits_read(); | 40 return bit_reader_core_.bits_read(); |
42 } | 41 } |
43 | 42 |
44 private: | 43 private: |
45 // BitReaderCore::ByteStreamProvider implementation. | 44 // BitReaderCore::ByteStreamProvider implementation. |
46 int GetBytes(int max_n, const uint8** out) override; | 45 int GetBytes(int max_n, const uint8_t** out) override; |
47 | 46 |
48 // Total number of bytes that was initially passed to BitReader. | 47 // Total number of bytes that was initially passed to BitReader. |
49 const int initial_size_; | 48 const int initial_size_; |
50 | 49 |
51 // Pointer to the next unread byte in the stream. | 50 // Pointer to the next unread byte in the stream. |
52 const uint8* data_; | 51 const uint8_t* data_; |
53 | 52 |
54 // Bytes left in the stream. | 53 // Bytes left in the stream. |
55 int bytes_left_; | 54 int bytes_left_; |
56 | 55 |
57 BitReaderCore bit_reader_core_; | 56 BitReaderCore bit_reader_core_; |
58 | 57 |
59 DISALLOW_COPY_AND_ASSIGN(BitReader); | 58 DISALLOW_COPY_AND_ASSIGN(BitReader); |
60 }; | 59 }; |
61 | 60 |
62 } // namespace media | 61 } // namespace media |
63 | 62 |
64 #endif // MEDIA_BASE_BIT_READER_H_ | 63 #endif // MEDIA_BASE_BIT_READER_H_ |
OLD | NEW |