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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 // MSVC++ requires this to be set before any other includes to get M_PI. | 5 // MSVC++ requires this to be set before any other includes to get M_PI. |
6 #define _USE_MATH_DEFINES | 6 #define _USE_MATH_DEFINES |
7 #include <cmath> | 7 #include <cmath> |
| 8 #include <sstream> |
8 | 9 |
9 #include "media/base/audio_hash.h" | 10 #include "media/base/audio_hash.h" |
10 | 11 |
11 #include "base/macros.h" | 12 #include "base/macros.h" |
12 #include "base/strings/stringprintf.h" | 13 #include "base/strings/stringprintf.h" |
13 #include "media/base/audio_bus.h" | 14 #include "media/base/audio_bus.h" |
14 | 15 |
15 namespace media { | 16 namespace media { |
16 | 17 |
17 AudioHash::AudioHash() | 18 AudioHash::AudioHash() |
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45 sample_count_ += static_cast<uint32_t>(frames); | 46 sample_count_ += static_cast<uint32_t>(frames); |
46 } | 47 } |
47 | 48 |
48 std::string AudioHash::ToString() const { | 49 std::string AudioHash::ToString() const { |
49 std::string result; | 50 std::string result; |
50 for (size_t i = 0; i < arraysize(audio_hash_); ++i) | 51 for (size_t i = 0; i < arraysize(audio_hash_); ++i) |
51 result += base::StringPrintf("%.2f,", audio_hash_[i]); | 52 result += base::StringPrintf("%.2f,", audio_hash_[i]); |
52 return result; | 53 return result; |
53 } | 54 } |
54 | 55 |
| 56 bool AudioHash::IsEquivalent(const std::string& other, double tolerance) const { |
| 57 float other_hash; |
| 58 char comma; |
| 59 |
| 60 std::stringstream is(other); |
| 61 for (size_t i = 0; i < arraysize(audio_hash_); ++i) { |
| 62 is >> other_hash >> comma; |
| 63 if (fabs(audio_hash_[i] - other_hash) > tolerance) |
| 64 return false; |
| 65 } |
| 66 return true; |
| 67 } |
| 68 |
55 } // namespace media | 69 } // namespace media |
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