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Side by Side Diff: media/base/audio_hash.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 2013 The Chromium Authors. All rights reserved. 1 // Copyright 2013 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_AUDIO_HASH_H_ 5 #ifndef MEDIA_BASE_AUDIO_HASH_H_
6 #define MEDIA_BASE_AUDIO_HASH_H_ 6 #define MEDIA_BASE_AUDIO_HASH_H_
7 7
8 #include <string> 8 #include <string>
9 9
10 #include "base/basictypes.h"
11 #include "base/strings/string_piece.h" 10 #include "base/strings/string_piece.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 AudioBus; 15 class AudioBus;
17 16
18 // Computes a running hash for a series of AudioBus objects. The hash is the 17 // Computes a running hash for a series of AudioBus objects. The hash is the
19 // sum of each sample bucketed based on the frame index, channel number, and 18 // sum of each sample bucketed based on the frame index, channel number, and
20 // current hash count. The hash was designed with two properties in mind: 19 // current hash count. The hash was designed with two properties in mind:
(...skipping 18 matching lines...) Expand all
39 38
40 // Return a string representation of the current hash. 39 // Return a string representation of the current hash.
41 std::string ToString() const; 40 std::string ToString() const;
42 41
43 private: 42 private:
44 // Storage for the audio hash. The number of buckets controls the importance 43 // Storage for the audio hash. The number of buckets controls the importance
45 // of position in the hash. A higher number reduces the chance of false 44 // of position in the hash. A higher number reduces the chance of false
46 // positives related to incorrect sample position. Value chosen by dice roll. 45 // positives related to incorrect sample position. Value chosen by dice roll.
47 float audio_hash_[6]; 46 float audio_hash_[6];
48 47
49 // The total number of samples processed per channel. Uses a uint32 instead 48 // The total number of samples processed per channel. Uses a uint32_t instead
50 // of size_t so overflows on 64-bit and 32-bit machines are equivalent. 49 // of size_t so overflows on 64-bit and 32-bit machines are equivalent.
51 uint32 sample_count_; 50 uint32_t sample_count_;
52 51
53 DISALLOW_COPY_AND_ASSIGN(AudioHash); 52 DISALLOW_COPY_AND_ASSIGN(AudioHash);
54 }; 53 };
55 54
56 } // namespace media 55 } // namespace media
57 56
58 #endif // MEDIA_BASE_AUDIO_HASH_H_ 57 #endif // MEDIA_BASE_AUDIO_HASH_H_
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