src/common_audio/signal_processing/resample_by_2_internal.h

/*
 *  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 header file contains some internal resampling functions.
 *
 */

#ifndef COMMON_AUDIO_SIGNAL_PROCESSING_RESAMPLE_BY_2_INTERNAL_H_
#define COMMON_AUDIO_SIGNAL_PROCESSING_RESAMPLE_BY_2_INTERNAL_H_

#include <pocketsphinx/sphinx_config.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#else
#include "rtc_base/typedefs.h"
#endif

/*******************************************************************
 * resample_by_2_fast.c
 * Functions for internal use in the other resample functions
 ******************************************************************/
void WebRtcSpl_DownBy2IntToShort(int32_t* in,
                                 int32_t len,
                                 int16_t* out,
                                 int32_t* state);

void WebRtcSpl_DownBy2ShortToInt(const int16_t* in,
                                 int32_t len,
                                 int32_t* out,
                                 int32_t* state);

void WebRtcSpl_UpBy2ShortToInt(const int16_t* in,
                               int32_t len,
                               int32_t* out,
                               int32_t* state);

void WebRtcSpl_UpBy2IntToInt(const int32_t* in,
                             int32_t len,
                             int32_t* out,
                             int32_t* state);

void WebRtcSpl_UpBy2IntToShort(const int32_t* in,
                               int32_t len,
                               int16_t* out,
                               int32_t* state);

void WebRtcSpl_LPBy2ShortToInt(const int16_t* in,
                               int32_t len,
                               int32_t* out,
                               int32_t* state);

void WebRtcSpl_LPBy2IntToInt(const int32_t* in,
                             int32_t len,
                             int32_t* out,
                             int32_t* state);

#endif  // COMMON_AUDIO_SIGNAL_PROCESSING_RESAMPLE_BY_2_INTERNAL_H_