1 /* 2 * Copyright (c) 2011 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 14 #include "aec_core.h" 15 16 enum { kResamplingDelay = 1 }; 17 enum { kResamplerBufferSize = FRAME_LEN * 4 }; 18 19 // Unless otherwise specified, functions return 0 on success and -1 on error 20 int WebRtcAec_CreateResampler(void **resampInst); 21 int WebRtcAec_InitResampler(void *resampInst, int deviceSampleRateHz); 22 int WebRtcAec_FreeResampler(void *resampInst); 23 24 // Estimates skew from raw measurement. 25 int WebRtcAec_GetSkew(void *resampInst, int rawSkew, float *skewEst); 26 27 // Resamples input using linear interpolation. 28 // Returns size of resampled array. 29 int WebRtcAec_ResampleLinear(void *resampInst, 30 const short *inspeech, 31 int size, 32 float skew, 33 short *outspeech); 34 35 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_RESAMPLER_H_ 36
