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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 |
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25 num_channels_(0) { | 25 num_channels_(0) { |
26 } | 26 } |
27 | 27 |
28 template <typename T> | 28 template <typename T> |
29 PushResampler<T>::~PushResampler() { | 29 PushResampler<T>::~PushResampler() { |
30 } | 30 } |
31 | 31 |
32 template <typename T> | 32 template <typename T> |
33 int PushResampler<T>::InitializeIfNeeded(int src_sample_rate_hz, | 33 int PushResampler<T>::InitializeIfNeeded(int src_sample_rate_hz, |
34 int dst_sample_rate_hz, | 34 int dst_sample_rate_hz, |
35 int num_channels) { | 35 size_t num_channels) { |
36 if (src_sample_rate_hz == src_sample_rate_hz_ && | 36 if (src_sample_rate_hz == src_sample_rate_hz_ && |
37 dst_sample_rate_hz == dst_sample_rate_hz_ && | 37 dst_sample_rate_hz == dst_sample_rate_hz_ && |
38 num_channels == num_channels_) | 38 num_channels == num_channels_) |
39 // No-op if settings haven't changed. | 39 // No-op if settings haven't changed. |
40 return 0; | 40 return 0; |
41 | 41 |
42 if (src_sample_rate_hz <= 0 || dst_sample_rate_hz <= 0 || | 42 if (src_sample_rate_hz <= 0 || dst_sample_rate_hz <= 0 || |
43 num_channels <= 0 || num_channels > 2) | 43 num_channels <= 0 || num_channels > 2) |
44 return -1; | 44 return -1; |
45 | 45 |
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61 sinc_resampler_right_.reset(new PushSincResampler(src_size_10ms_mono, | 61 sinc_resampler_right_.reset(new PushSincResampler(src_size_10ms_mono, |
62 dst_size_10ms_mono)); | 62 dst_size_10ms_mono)); |
63 } | 63 } |
64 | 64 |
65 return 0; | 65 return 0; |
66 } | 66 } |
67 | 67 |
68 template <typename T> | 68 template <typename T> |
69 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, |
70 size_t dst_capacity) { | 70 size_t dst_capacity) { |
71 const size_t src_size_10ms = | 71 const size_t src_size_10ms = src_sample_rate_hz_ * num_channels_ / 100; |
72 static_cast<size_t>(src_sample_rate_hz_ * num_channels_ / 100); | 72 const size_t dst_size_10ms = dst_sample_rate_hz_ * num_channels_ / 100; |
73 const size_t dst_size_10ms = | |
74 static_cast<size_t>(dst_sample_rate_hz_ * num_channels_ / 100); | |
75 if (src_length != src_size_10ms || dst_capacity < dst_size_10ms) | 73 if (src_length != src_size_10ms || dst_capacity < dst_size_10ms) |
76 return -1; | 74 return -1; |
77 | 75 |
78 if (src_sample_rate_hz_ == dst_sample_rate_hz_) { | 76 if (src_sample_rate_hz_ == dst_sample_rate_hz_) { |
79 // 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 |
80 // sample rates, so reproduce it here for the sinc resampler. | 78 // sample rates, so reproduce it here for the sinc resampler. |
81 memcpy(dst, src, src_length * sizeof(T)); | 79 memcpy(dst, src, src_length * sizeof(T)); |
82 return static_cast<int>(src_length); | 80 return static_cast<int>(src_length); |
83 } | 81 } |
84 if (num_channels_ == 2) { | 82 if (num_channels_ == 2) { |
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101 return static_cast<int>( | 99 return static_cast<int>( |
102 sinc_resampler_->Resample(src, src_length, dst, dst_capacity)); | 100 sinc_resampler_->Resample(src, src_length, dst, dst_capacity)); |
103 } | 101 } |
104 } | 102 } |
105 | 103 |
106 // Explictly generate required instantiations. | 104 // Explictly generate required instantiations. |
107 template class PushResampler<int16_t>; | 105 template class PushResampler<int16_t>; |
108 template class PushResampler<float>; | 106 template class PushResampler<float>; |
109 | 107 |
110 } // namespace webrtc | 108 } // namespace webrtc |
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