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Side by Side Diff: media/base/audio_hash.h

Issue 1727953005: Enable AudioDecoder unit tests on Android (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Undid the split, disabled ffmpeg tests on Android Created 4 years, 9 months 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 <stddef.h> 8 #include <stddef.h>
9 #include <stdint.h> 9 #include <stdint.h>
10 10
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36 public: 36 public:
37 AudioHash(); 37 AudioHash();
38 ~AudioHash(); 38 ~AudioHash();
39 39
40 // Update current hash with the contents of the provided AudioBus. 40 // Update current hash with the contents of the provided AudioBus.
41 void Update(const AudioBus* audio_bus, int frames); 41 void Update(const AudioBus* audio_bus, int frames);
42 42
43 // Return a string representation of the current hash. 43 // Return a string representation of the current hash.
44 std::string ToString() const; 44 std::string ToString() const;
45 45
46 // Compare with another hash value given as string representation.
DaleCurtis 2016/02/26 23:31:42 It's a bit odd having an equivalence test like thi
47 // Returns true if for every bucket the difference between this and
48 // other is less than tolerance.
49 bool IsEquivalent(const std::string& other, double tolerance) const;
50
46 private: 51 private:
47 // Storage for the audio hash. The number of buckets controls the importance 52 // Storage for the audio hash. The number of buckets controls the importance
48 // of position in the hash. A higher number reduces the chance of false 53 // of position in the hash. A higher number reduces the chance of false
49 // positives related to incorrect sample position. Value chosen by dice roll. 54 // positives related to incorrect sample position. Value chosen by dice roll.
50 float audio_hash_[6]; 55 float audio_hash_[6];
51 56
52 // The total number of samples processed per channel. Uses a uint32_t instead 57 // The total number of samples processed per channel. Uses a uint32_t instead
53 // of size_t so overflows on 64-bit and 32-bit machines are equivalent. 58 // of size_t so overflows on 64-bit and 32-bit machines are equivalent.
54 uint32_t sample_count_; 59 uint32_t sample_count_;
55 60
56 DISALLOW_COPY_AND_ASSIGN(AudioHash); 61 DISALLOW_COPY_AND_ASSIGN(AudioHash);
57 }; 62 };
58 63
59 } // namespace media 64 } // namespace media
60 65
61 #endif // MEDIA_BASE_AUDIO_HASH_H_ 66 #endif // MEDIA_BASE_AUDIO_HASH_H_
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