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Side by Side Diff: webrtc/common_audio/vad/vad_sp.c

Issue 2974613003: base->rtc_base: Update .c, .mm and .java files. (Closed)
Patch Set: Created 3 years, 5 months ago
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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/vad/vad_sp.h" 11 #include "webrtc/common_audio/vad/vad_sp.h"
12 12
13 #include "webrtc/base/checks.h" 13 #include "webrtc/rtc_base/checks.h"
14 #include "webrtc/common_audio/signal_processing/include/signal_processing_librar y.h" 14 #include "webrtc/common_audio/signal_processing/include/signal_processing_librar y.h"
15 #include "webrtc/common_audio/vad/vad_core.h" 15 #include "webrtc/common_audio/vad/vad_core.h"
16 #include "webrtc/typedefs.h" 16 #include "webrtc/typedefs.h"
17 17
18 // Allpass filter coefficients, upper and lower, in Q13. 18 // Allpass filter coefficients, upper and lower, in Q13.
19 // Upper: 0.64, Lower: 0.17. 19 // Upper: 0.64, Lower: 0.17.
20 static const int16_t kAllPassCoefsQ13[2] = { 5243, 1392 }; // Q13. 20 static const int16_t kAllPassCoefsQ13[2] = { 5243, 1392 }; // Q13.
21 static const int16_t kSmoothingDown = 6553; // 0.2 in Q15. 21 static const int16_t kSmoothingDown = 6553; // 0.2 in Q15.
22 static const int16_t kSmoothingUp = 32439; // 0.99 in Q15. 22 static const int16_t kSmoothingUp = 32439; // 0.99 in Q15.
23 23
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168 alpha = kSmoothingUp; // 0.99 in Q15. 168 alpha = kSmoothingUp; // 0.99 in Q15.
169 } 169 }
170 } 170 }
171 tmp32 = (alpha + 1) * self->mean_value[channel]; 171 tmp32 = (alpha + 1) * self->mean_value[channel];
172 tmp32 += (WEBRTC_SPL_WORD16_MAX - alpha) * current_median; 172 tmp32 += (WEBRTC_SPL_WORD16_MAX - alpha) * current_median;
173 tmp32 += 16384; 173 tmp32 += 16384;
174 self->mean_value[channel] = (int16_t) (tmp32 >> 15); 174 self->mean_value[channel] = (int16_t) (tmp32 >> 15);
175 175
176 return self->mean_value[channel]; 176 return self->mean_value[channel];
177 } 177 }
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