andrew@webrtc.org | b015cbe | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
| 3 | * |
| 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 |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_RESAMPLER_H_ |
| 12 | #define WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_RESAMPLER_H_ |
| 13 | |
pbos@webrtc.org | 9fb1613 | 2013-05-28 08:11:59 +0000 | [diff] [blame] | 14 | #include "webrtc/modules/audio_processing/aec/aec_core.h" |
andrew@webrtc.org | b015cbe | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 15 | |
andrew@webrtc.org | 2f40af3 | 2013-10-08 23:41:42 +0000 | [diff] [blame] | 16 | enum { |
| 17 | kResamplingDelay = 1 |
| 18 | }; |
| 19 | enum { |
| 20 | kResamplerBufferSize = FRAME_LEN * 4 |
| 21 | }; |
andrew@webrtc.org | b015cbe | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 22 | |
| 23 | // Unless otherwise specified, functions return 0 on success and -1 on error |
andrew@webrtc.org | 2f40af3 | 2013-10-08 23:41:42 +0000 | [diff] [blame] | 24 | int WebRtcAec_CreateResampler(void** resampInst); |
| 25 | int WebRtcAec_InitResampler(void* resampInst, int deviceSampleRateHz); |
| 26 | int WebRtcAec_FreeResampler(void* resampInst); |
andrew@webrtc.org | b015cbe | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 27 | |
| 28 | // Estimates skew from raw measurement. |
andrew@webrtc.org | 2f40af3 | 2013-10-08 23:41:42 +0000 | [diff] [blame] | 29 | int WebRtcAec_GetSkew(void* resampInst, int rawSkew, float* skewEst); |
andrew@webrtc.org | b015cbe | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 30 | |
| 31 | // Resamples input using linear interpolation. |
andrew@webrtc.org | 2f40af3 | 2013-10-08 23:41:42 +0000 | [diff] [blame] | 32 | void WebRtcAec_ResampleLinear(void* resampInst, |
kwiberg@webrtc.org | 38a0cee | 2014-07-03 09:47:33 +0000 | [diff] [blame] | 33 | const float* inspeech, |
andrew@webrtc.org | b015cbe | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 34 | int size, |
| 35 | float skew, |
kwiberg@webrtc.org | 38a0cee | 2014-07-03 09:47:33 +0000 | [diff] [blame] | 36 | float* outspeech, |
andrew@webrtc.org | 2f40af3 | 2013-10-08 23:41:42 +0000 | [diff] [blame] | 37 | int* size_out); |
andrew@webrtc.org | b015cbe | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 38 | |
| 39 | #endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_RESAMPLER_H_ |