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Side by Side Diff: media/formats/mp2t/timestamp_unroller.h

Issue 1534273002: Switch to standard integer types in media/. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: more Created 5 years 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 MEDIA_FORMATS_MP2T_TIMESTAMP_UNROLLER_H_ 5 #ifndef MEDIA_FORMATS_MP2T_TIMESTAMP_UNROLLER_H_
6 #define MEDIA_FORMATS_MP2T_TIMESTAMP_UNROLLER_H_ 6 #define MEDIA_FORMATS_MP2T_TIMESTAMP_UNROLLER_H_
7 7
8 #include "base/basictypes.h" 8 #include <stdint.h>
9
9 #include "base/macros.h" 10 #include "base/macros.h"
10 #include "media/base/media_export.h" 11 #include "media/base/media_export.h"
11 12
12 namespace media { 13 namespace media {
13 namespace mp2t { 14 namespace mp2t {
14 15
15 class MEDIA_EXPORT TimestampUnroller { 16 class MEDIA_EXPORT TimestampUnroller {
16 public: 17 public:
17 TimestampUnroller(); 18 TimestampUnroller();
18 ~TimestampUnroller(); 19 ~TimestampUnroller();
19 20
20 // Given that |timestamp| is coded using 33 bits (accuracy of MPEG-2 TS 21 // Given that |timestamp| is coded using 33 bits (accuracy of MPEG-2 TS
21 // timestamps), GetUnrolledTimestamp returns the corresponding unrolled 22 // timestamps), GetUnrolledTimestamp returns the corresponding unrolled
22 // timestamp. 23 // timestamp.
23 // The unrolled timestamp is defined by: 24 // The unrolled timestamp is defined by:
24 // |timestamp| + k * (2 ^ 33) 25 // |timestamp| + k * (2 ^ 33)
25 // where k is estimated so that the unrolled timestamp is as close as 26 // where k is estimated so that the unrolled timestamp is as close as
26 // possible to the previous unrolled timestamp returned by this function 27 // possible to the previous unrolled timestamp returned by this function
27 // (if this function has not been called before, it will return the timestamp 28 // (if this function has not been called before, it will return the timestamp
28 // unmodified). 29 // unmodified).
29 int64 GetUnrolledTimestamp(int64 timestamp); 30 int64_t GetUnrolledTimestamp(int64_t timestamp);
30 31
31 // Reset the TimestampUnroller to its initial state. 32 // Reset the TimestampUnroller to its initial state.
32 void Reset(); 33 void Reset();
33 34
34 private: 35 private:
35 // Indicate whether the value of |previous_unrolled_timestamp_| is valid. 36 // Indicate whether the value of |previous_unrolled_timestamp_| is valid.
36 bool is_previous_timestamp_valid_; 37 bool is_previous_timestamp_valid_;
37 38
38 // This is the last output of GetUnrolledTimestamp. 39 // This is the last output of GetUnrolledTimestamp.
39 int64 previous_unrolled_timestamp_; 40 int64_t previous_unrolled_timestamp_;
40 41
41 DISALLOW_COPY_AND_ASSIGN(TimestampUnroller); 42 DISALLOW_COPY_AND_ASSIGN(TimestampUnroller);
42 }; 43 };
43 44
44 } // namespace mp2t 45 } // namespace mp2t
45 } // namespace media 46 } // namespace media
46 47
47 #endif // MEDIA_FORMATS_MP2T_TIMESTAMP_UNROLLER_H_ 48 #endif // MEDIA_FORMATS_MP2T_TIMESTAMP_UNROLLER_H_
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