chromium/third_party/webrtc/common_audio/signal_processing/resample_48khz.c

/*
 *  Copyright (c) 2011 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.
 */


/*
 * This file contains resampling functions between 48 kHz and nb/wb.
 * The description header can be found in signal_processing_library.h
 *
 */

#include <string.h>
#include "common_audio/signal_processing/include/signal_processing_library.h"
#include "common_audio/signal_processing/resample_by_2_internal.h"

////////////////////////////
///// 48 kHz -> 16 kHz /////
////////////////////////////

// 48 -> 16 resampler
void WebRtcSpl_Resample48khzTo16khz(const int16_t* in, int16_t* out,
                                    WebRtcSpl_State48khzTo16khz* state, int32_t* tmpmem)
{ … }

// initialize state of 48 -> 16 resampler
void WebRtcSpl_ResetResample48khzTo16khz(WebRtcSpl_State48khzTo16khz* state)
{ … }

////////////////////////////
///// 16 kHz -> 48 kHz /////
////////////////////////////

// 16 -> 48 resampler
void WebRtcSpl_Resample16khzTo48khz(const int16_t* in, int16_t* out,
                                    WebRtcSpl_State16khzTo48khz* state, int32_t* tmpmem)
{ … }

// initialize state of 16 -> 48 resampler
void WebRtcSpl_ResetResample16khzTo48khz(WebRtcSpl_State16khzTo48khz* state)
{ … }

////////////////////////////
///// 48 kHz ->  8 kHz /////
////////////////////////////

// 48 -> 8 resampler
void WebRtcSpl_Resample48khzTo8khz(const int16_t* in, int16_t* out,
                                   WebRtcSpl_State48khzTo8khz* state, int32_t* tmpmem)
{ … }

// initialize state of 48 -> 8 resampler
void WebRtcSpl_ResetResample48khzTo8khz(WebRtcSpl_State48khzTo8khz* state)
{ … }

////////////////////////////
/////  8 kHz -> 48 kHz /////
////////////////////////////

// 8 -> 48 resampler
void WebRtcSpl_Resample8khzTo48khz(const int16_t* in, int16_t* out,
                                   WebRtcSpl_State8khzTo48khz* state, int32_t* tmpmem)
{ … }

// initialize state of 8 -> 48 resampler
void WebRtcSpl_ResetResample8khzTo48khz(WebRtcSpl_State8khzTo48khz* state)
{ … }