OLD | NEW |
1 /* | 1 /* |
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2016 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/modules/audio_processing/level_controller/down_sampler.h" | 11 #include "webrtc/modules/audio_processing/level_controller/down_sampler.h" |
12 | 12 |
13 #include <string.h> | 13 #include <string.h> |
14 #include <algorithm> | 14 #include <algorithm> |
15 #include <vector> | 15 #include <vector> |
16 | 16 |
17 #include "webrtc/base/checks.h" | |
18 #include "webrtc/modules/audio_processing/include/audio_processing.h" | 17 #include "webrtc/modules/audio_processing/include/audio_processing.h" |
19 #include "webrtc/modules/audio_processing/level_controller/biquad_filter.h" | 18 #include "webrtc/modules/audio_processing/level_controller/biquad_filter.h" |
20 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h" | 19 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h" |
| 20 #include "webrtc/rtc_base/checks.h" |
21 | 21 |
22 namespace webrtc { | 22 namespace webrtc { |
23 namespace { | 23 namespace { |
24 | 24 |
25 // Bandlimiter coefficients computed based on that only | 25 // Bandlimiter coefficients computed based on that only |
26 // the first 40 bins of the spectrum for the downsampled | 26 // the first 40 bins of the spectrum for the downsampled |
27 // signal are used. | 27 // signal are used. |
28 // [B,A] = butter(2,(41/64*4000)/8000) | 28 // [B,A] = butter(2,(41/64*4000)/8000) |
29 const BiQuadFilter::BiQuadCoefficients kLowPassFilterCoefficients_16kHz = { | 29 const BiQuadFilter::BiQuadCoefficients kLowPassFilterCoefficients_16kHz = { |
30 {0.1455f, 0.2911f, 0.1455f}, | 30 {0.1455f, 0.2911f, 0.1455f}, |
(...skipping 60 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
91 } | 91 } |
92 } else { | 92 } else { |
93 std::copy(in.data(), in.data() + in.size(), out.data()); | 93 std::copy(in.data(), in.data() + in.size(), out.data()); |
94 } | 94 } |
95 | 95 |
96 data_dumper_->DumpWav("lc_down_sampler_output", out, | 96 data_dumper_->DumpWav("lc_down_sampler_output", out, |
97 AudioProcessing::kSampleRate8kHz, 1); | 97 AudioProcessing::kSampleRate8kHz, 1); |
98 } | 98 } |
99 | 99 |
100 } // namespace webrtc | 100 } // namespace webrtc |
OLD | NEW |