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Side by Side Diff: webrtc/modules/audio_processing/agc/legacy/digital_agc.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) 2011 The WebRTC project authors. All Rights Reserved. 2 * Copyright (c) 2011 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 /* digital_agc.c 11 /* digital_agc.c
12 * 12 *
13 */ 13 */
14 14
15 #include "webrtc/modules/audio_processing/agc/legacy/digital_agc.h" 15 #include "webrtc/modules/audio_processing/agc/legacy/digital_agc.h"
16 16
17 #include <string.h> 17 #include <string.h>
18 #ifdef WEBRTC_AGC_DEBUG_DUMP 18 #ifdef WEBRTC_AGC_DEBUG_DUMP
19 #include <stdio.h> 19 #include <stdio.h>
20 #endif 20 #endif
21 21
22 #include "webrtc/base/checks.h" 22 #include "webrtc/rtc_base/checks.h"
23 #include "webrtc/modules/audio_processing/agc/legacy/gain_control.h" 23 #include "webrtc/modules/audio_processing/agc/legacy/gain_control.h"
24 24
25 // To generate the gaintable, copy&paste the following lines to a Matlab window: 25 // To generate the gaintable, copy&paste the following lines to a Matlab window:
26 // MaxGain = 6; MinGain = 0; CompRatio = 3; Knee = 1; 26 // MaxGain = 6; MinGain = 0; CompRatio = 3; Knee = 1;
27 // zeros = 0:31; lvl = 2.^(1-zeros); 27 // zeros = 0:31; lvl = 2.^(1-zeros);
28 // A = -10*log10(lvl) * (CompRatio - 1) / CompRatio; 28 // A = -10*log10(lvl) * (CompRatio - 1) / CompRatio;
29 // B = MaxGain - MinGain; 29 // B = MaxGain - MinGain;
30 // gains = round(2^16*10.^(0.05 * (MinGain + B * ( 30 // gains = round(2^16*10.^(0.05 * (MinGain + B * (
31 // log(exp(-Knee*A)+exp(-Knee*B)) - log(1+exp(-Knee*B)) ) / 31 // log(exp(-Knee*A)+exp(-Knee*B)) - log(1+exp(-Knee*B)) ) /
32 // log(1/(1+exp(Knee*B)))))); 32 // log(1/(1+exp(Knee*B))))));
(...skipping 646 matching lines...) Expand 10 before | Expand all | Expand 10 after
679 // limit 679 // limit
680 if (state->logRatio > 2048) { 680 if (state->logRatio > 2048) {
681 state->logRatio = 2048; 681 state->logRatio = 2048;
682 } 682 }
683 if (state->logRatio < -2048) { 683 if (state->logRatio < -2048) {
684 state->logRatio = -2048; 684 state->logRatio = -2048;
685 } 685 }
686 686
687 return state->logRatio; // Q10 687 return state->logRatio; // Q10
688 } 688 }
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