| /* |
| * Copyright (c) 2018 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_COMMON_H_ |
| #define MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_COMMON_H_ |
| |
| namespace webrtc { |
| namespace rnn_vad { |
| |
| constexpr double kPi = 3.14159265358979323846; |
| |
| constexpr size_t kSampleRate24kHz = 24000; |
| constexpr size_t kFrameSize10ms24kHz = kSampleRate24kHz / 100; |
| constexpr size_t kFrameSize20ms24kHz = kFrameSize10ms24kHz * 2; |
| |
| // Pitch analysis params. |
| constexpr size_t kMinPitch24kHz = kSampleRate24kHz / 800; // 0.00125 s. |
| constexpr size_t kMaxPitch24kHz = kSampleRate24kHz / 62.5; // 0.016 s. |
| constexpr size_t kBufSize24kHz = kMaxPitch24kHz + kFrameSize20ms24kHz; |
| static_assert((kBufSize24kHz & 1) == 0, "The buffer size must be even."); |
| |
| // Define a higher minimum pitch period for the initial search. This is used to |
| // avoid searching for very short periods, for which a refinement step is |
| // responsible. |
| constexpr size_t kInitialMinPitch24kHz = 3 * kMinPitch24kHz; |
| static_assert(kMinPitch24kHz < kInitialMinPitch24kHz, ""); |
| static_assert(kInitialMinPitch24kHz < kMaxPitch24kHz, ""); |
| |
| // 12 kHz analysis. |
| constexpr size_t kSampleRate12kHz = 12000; |
| constexpr size_t kFrameSize10ms12kHz = kSampleRate12kHz / 100; |
| constexpr size_t kFrameSize20ms12kHz = kFrameSize10ms12kHz * 2; |
| constexpr size_t kBufSize12kHz = kBufSize24kHz / 2; |
| constexpr size_t kInitialMinPitch12kHz = kInitialMinPitch24kHz / 2; |
| constexpr size_t kMaxPitch12kHz = kMaxPitch24kHz / 2; |
| |
| // 48 kHz constants. |
| constexpr size_t kMinPitch48kHz = kMinPitch24kHz * 2; |
| constexpr size_t kMaxPitch48kHz = kMaxPitch24kHz * 2; |
| |
| constexpr size_t kFeatureVectorSize = 42; |
| |
| } // namespace rnn_vad |
| } // namespace webrtc |
| |
| #endif // MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_COMMON_H_ |