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1 /* | 1 /* |
2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2013 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/resampler/include/push_resampler.h" | 11 #include "webrtc/common_audio/resampler/include/push_resampler.h" |
12 | 12 |
13 #include <string.h> | 13 #include <string.h> |
14 | 14 |
15 #include "webrtc/base/checks.h" | |
16 #include "webrtc/common_audio/include/audio_util.h" | 15 #include "webrtc/common_audio/include/audio_util.h" |
17 #include "webrtc/common_audio/resampler/include/resampler.h" | 16 #include "webrtc/common_audio/resampler/include/resampler.h" |
18 #include "webrtc/common_audio/resampler/push_sinc_resampler.h" | 17 #include "webrtc/common_audio/resampler/push_sinc_resampler.h" |
19 | 18 |
20 namespace webrtc { | 19 namespace webrtc { |
21 | 20 |
22 template <typename T> | 21 template <typename T> |
23 PushResampler<T>::PushResampler() | 22 PushResampler<T>::PushResampler() |
24 : src_sample_rate_hz_(0), | 23 : src_sample_rate_hz_(0), |
25 dst_sample_rate_hz_(0), | 24 dst_sample_rate_hz_(0), |
26 num_channels_(0) { | 25 num_channels_(0) { |
27 } | 26 } |
28 | 27 |
29 template <typename T> | 28 template <typename T> |
30 PushResampler<T>::~PushResampler() { | 29 PushResampler<T>::~PushResampler() { |
31 } | 30 } |
32 | 31 |
33 template <typename T> | 32 template <typename T> |
34 int PushResampler<T>::InitializeIfNeeded(int src_sample_rate_hz, | 33 int PushResampler<T>::InitializeIfNeeded(int src_sample_rate_hz, |
35 int dst_sample_rate_hz, | 34 int dst_sample_rate_hz, |
36 size_t num_channels) { | 35 size_t num_channels) { |
37 RTC_DCHECK_GT(src_sample_rate_hz, 0); | |
38 RTC_DCHECK_GT(dst_sample_rate_hz, 0); | |
39 RTC_DCHECK_GT(num_channels, 0u); | |
40 RTC_DCHECK_LE(num_channels, 2u); | |
41 | |
42 if (src_sample_rate_hz == src_sample_rate_hz_ && | 36 if (src_sample_rate_hz == src_sample_rate_hz_ && |
43 dst_sample_rate_hz == dst_sample_rate_hz_ && | 37 dst_sample_rate_hz == dst_sample_rate_hz_ && |
44 num_channels == num_channels_) { | 38 num_channels == num_channels_) |
45 // No-op if settings haven't changed. | 39 // No-op if settings haven't changed. |
46 return 0; | 40 return 0; |
47 } | |
48 | 41 |
49 if (src_sample_rate_hz <= 0 || dst_sample_rate_hz <= 0 || num_channels <= 0 || | 42 if (src_sample_rate_hz <= 0 || dst_sample_rate_hz <= 0 || |
50 num_channels > 2) { | 43 num_channels <= 0 || num_channels > 2) |
51 return -1; | 44 return -1; |
52 } | |
53 | 45 |
54 src_sample_rate_hz_ = src_sample_rate_hz; | 46 src_sample_rate_hz_ = src_sample_rate_hz; |
55 dst_sample_rate_hz_ = dst_sample_rate_hz; | 47 dst_sample_rate_hz_ = dst_sample_rate_hz; |
56 num_channels_ = num_channels; | 48 num_channels_ = num_channels; |
57 | 49 |
58 const size_t src_size_10ms_mono = | 50 const size_t src_size_10ms_mono = |
59 static_cast<size_t>(src_sample_rate_hz / 100); | 51 static_cast<size_t>(src_sample_rate_hz / 100); |
60 const size_t dst_size_10ms_mono = | 52 const size_t dst_size_10ms_mono = |
61 static_cast<size_t>(dst_sample_rate_hz / 100); | 53 static_cast<size_t>(dst_sample_rate_hz / 100); |
62 sinc_resampler_.reset(new PushSincResampler(src_size_10ms_mono, | 54 sinc_resampler_.reset(new PushSincResampler(src_size_10ms_mono, |
63 dst_size_10ms_mono)); | 55 dst_size_10ms_mono)); |
64 if (num_channels_ == 2) { | 56 if (num_channels_ == 2) { |
65 src_left_.reset(new T[src_size_10ms_mono]); | 57 src_left_.reset(new T[src_size_10ms_mono]); |
66 src_right_.reset(new T[src_size_10ms_mono]); | 58 src_right_.reset(new T[src_size_10ms_mono]); |
67 dst_left_.reset(new T[dst_size_10ms_mono]); | 59 dst_left_.reset(new T[dst_size_10ms_mono]); |
68 dst_right_.reset(new T[dst_size_10ms_mono]); | 60 dst_right_.reset(new T[dst_size_10ms_mono]); |
69 sinc_resampler_right_.reset(new PushSincResampler(src_size_10ms_mono, | 61 sinc_resampler_right_.reset(new PushSincResampler(src_size_10ms_mono, |
70 dst_size_10ms_mono)); | 62 dst_size_10ms_mono)); |
71 } | 63 } |
72 | 64 |
73 return 0; | 65 return 0; |
74 } | 66 } |
75 | 67 |
76 template <typename T> | 68 template <typename T> |
77 int PushResampler<T>::Resample(const T* src, size_t src_length, T* dst, | 69 int PushResampler<T>::Resample(const T* src, size_t src_length, T* dst, |
78 size_t dst_capacity) { | 70 size_t dst_capacity) { |
79 const size_t src_size_10ms = src_sample_rate_hz_ * num_channels_ / 100; | 71 const size_t src_size_10ms = src_sample_rate_hz_ * num_channels_ / 100; |
80 const size_t dst_size_10ms = dst_sample_rate_hz_ * num_channels_ / 100; | 72 const size_t dst_size_10ms = dst_sample_rate_hz_ * num_channels_ / 100; |
81 RTC_CHECK_EQ(src_length, src_size_10ms); | |
82 RTC_CHECK_GE(dst_capacity, dst_size_10ms); | |
83 if (src_length != src_size_10ms || dst_capacity < dst_size_10ms) | 73 if (src_length != src_size_10ms || dst_capacity < dst_size_10ms) |
84 return -1; | 74 return -1; |
85 | 75 |
86 if (src_sample_rate_hz_ == dst_sample_rate_hz_) { | 76 if (src_sample_rate_hz_ == dst_sample_rate_hz_) { |
87 // The old resampler provides this memcpy facility in the case of matching | 77 // The old resampler provides this memcpy facility in the case of matching |
88 // sample rates, so reproduce it here for the sinc resampler. | 78 // sample rates, so reproduce it here for the sinc resampler. |
89 memcpy(dst, src, src_length * sizeof(T)); | 79 memcpy(dst, src, src_length * sizeof(T)); |
90 return static_cast<int>(src_length); | 80 return static_cast<int>(src_length); |
91 } | 81 } |
92 if (num_channels_ == 2) { | 82 if (num_channels_ == 2) { |
(...skipping 16 matching lines...) Expand all Loading... |
109 return static_cast<int>( | 99 return static_cast<int>( |
110 sinc_resampler_->Resample(src, src_length, dst, dst_capacity)); | 100 sinc_resampler_->Resample(src, src_length, dst, dst_capacity)); |
111 } | 101 } |
112 } | 102 } |
113 | 103 |
114 // Explictly generate required instantiations. | 104 // Explictly generate required instantiations. |
115 template class PushResampler<int16_t>; | 105 template class PushResampler<int16_t>; |
116 template class PushResampler<float>; | 106 template class PushResampler<float>; |
117 | 107 |
118 } // namespace webrtc | 108 } // namespace webrtc |
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