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1 /* | 1 /* |
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #include "webrtc/common_audio/signal_processing/include/real_fft.h" | 11 #include "webrtc/common_audio/signal_processing/include/real_fft.h" |
12 #include "webrtc/common_audio/signal_processing/include/signal_processing_librar
y.h" | 12 #include "webrtc/common_audio/signal_processing/include/signal_processing_librar
y.h" |
| 13 #include "webrtc/test/gtest.h" |
13 #include "webrtc/typedefs.h" | 14 #include "webrtc/typedefs.h" |
14 | 15 |
15 #include "webrtc/test/gtest.h" | |
16 | |
17 namespace webrtc { | 16 namespace webrtc { |
18 namespace { | 17 namespace { |
19 | 18 |
20 // FFT order. | 19 // FFT order. |
21 const int kOrder = 5; | 20 const int kOrder = 5; |
22 // Lengths for real FFT's time and frequency bufffers. | 21 // Lengths for real FFT's time and frequency bufffers. |
23 // For N-point FFT, the length requirements from API are N and N+2 respectively. | 22 // For N-point FFT, the length requirements from API are N and N+2 respectively. |
24 const int kTimeDataLength = 1 << kOrder; | 23 const int kTimeDataLength = 1 << kOrder; |
25 const int kFreqDataLength = (1 << kOrder) + 2; | 24 const int kFreqDataLength = (1 << kOrder) + 2; |
26 // For complex FFT's time and freq buffer. The implementation requires | 25 // For complex FFT's time and freq buffer. The implementation requires |
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98 EXPECT_EQ(real_scale, complex_scale); | 97 EXPECT_EQ(real_scale, complex_scale); |
99 for (i = 0, j = 0; i < kTimeDataLength; i += 1, j += 2) { | 98 for (i = 0, j = 0; i < kTimeDataLength; i += 1, j += 2) { |
100 EXPECT_LE(abs(real_fft_time[i] - complex_fft_buff[j]), 1); | 99 EXPECT_LE(abs(real_fft_time[i] - complex_fft_buff[j]), 1); |
101 } | 100 } |
102 | 101 |
103 WebRtcSpl_FreeRealFFT(fft); | 102 WebRtcSpl_FreeRealFFT(fft); |
104 } | 103 } |
105 | 104 |
106 } // namespace | 105 } // namespace |
107 } // namespace webrtc | 106 } // namespace webrtc |
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