mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-12 19:24:19 +00:00
d83a3d71bc
Merge in RedPhone // FREEBIE
187 lines
5.7 KiB
C
187 lines
5.7 KiB
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 "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
|
|
#include "webrtc/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)
|
|
{
|
|
///// 48 --> 48(LP) /////
|
|
// int16_t in[480]
|
|
// int32_t out[480]
|
|
/////
|
|
WebRtcSpl_LPBy2ShortToInt(in, 480, tmpmem + 16, state->S_48_48);
|
|
|
|
///// 48 --> 32 /////
|
|
// int32_t in[480]
|
|
// int32_t out[320]
|
|
/////
|
|
// copy state to and from input array
|
|
memcpy(tmpmem + 8, state->S_48_32, 8 * sizeof(int32_t));
|
|
memcpy(state->S_48_32, tmpmem + 488, 8 * sizeof(int32_t));
|
|
WebRtcSpl_Resample48khzTo32khz(tmpmem + 8, tmpmem, 160);
|
|
|
|
///// 32 --> 16 /////
|
|
// int32_t in[320]
|
|
// int16_t out[160]
|
|
/////
|
|
WebRtcSpl_DownBy2IntToShort(tmpmem, 320, out, state->S_32_16);
|
|
}
|
|
|
|
// initialize state of 48 -> 16 resampler
|
|
void WebRtcSpl_ResetResample48khzTo16khz(WebRtcSpl_State48khzTo16khz* state)
|
|
{
|
|
memset(state->S_48_48, 0, 16 * sizeof(int32_t));
|
|
memset(state->S_48_32, 0, 8 * sizeof(int32_t));
|
|
memset(state->S_32_16, 0, 8 * sizeof(int32_t));
|
|
}
|
|
|
|
////////////////////////////
|
|
///// 16 kHz -> 48 kHz /////
|
|
////////////////////////////
|
|
|
|
// 16 -> 48 resampler
|
|
void WebRtcSpl_Resample16khzTo48khz(const int16_t* in, int16_t* out,
|
|
WebRtcSpl_State16khzTo48khz* state, int32_t* tmpmem)
|
|
{
|
|
///// 16 --> 32 /////
|
|
// int16_t in[160]
|
|
// int32_t out[320]
|
|
/////
|
|
WebRtcSpl_UpBy2ShortToInt(in, 160, tmpmem + 16, state->S_16_32);
|
|
|
|
///// 32 --> 24 /////
|
|
// int32_t in[320]
|
|
// int32_t out[240]
|
|
// copy state to and from input array
|
|
/////
|
|
memcpy(tmpmem + 8, state->S_32_24, 8 * sizeof(int32_t));
|
|
memcpy(state->S_32_24, tmpmem + 328, 8 * sizeof(int32_t));
|
|
WebRtcSpl_Resample32khzTo24khz(tmpmem + 8, tmpmem, 80);
|
|
|
|
///// 24 --> 48 /////
|
|
// int32_t in[240]
|
|
// int16_t out[480]
|
|
/////
|
|
WebRtcSpl_UpBy2IntToShort(tmpmem, 240, out, state->S_24_48);
|
|
}
|
|
|
|
// initialize state of 16 -> 48 resampler
|
|
void WebRtcSpl_ResetResample16khzTo48khz(WebRtcSpl_State16khzTo48khz* state)
|
|
{
|
|
memset(state->S_16_32, 0, 8 * sizeof(int32_t));
|
|
memset(state->S_32_24, 0, 8 * sizeof(int32_t));
|
|
memset(state->S_24_48, 0, 8 * sizeof(int32_t));
|
|
}
|
|
|
|
////////////////////////////
|
|
///// 48 kHz -> 8 kHz /////
|
|
////////////////////////////
|
|
|
|
// 48 -> 8 resampler
|
|
void WebRtcSpl_Resample48khzTo8khz(const int16_t* in, int16_t* out,
|
|
WebRtcSpl_State48khzTo8khz* state, int32_t* tmpmem)
|
|
{
|
|
///// 48 --> 24 /////
|
|
// int16_t in[480]
|
|
// int32_t out[240]
|
|
/////
|
|
WebRtcSpl_DownBy2ShortToInt(in, 480, tmpmem + 256, state->S_48_24);
|
|
|
|
///// 24 --> 24(LP) /////
|
|
// int32_t in[240]
|
|
// int32_t out[240]
|
|
/////
|
|
WebRtcSpl_LPBy2IntToInt(tmpmem + 256, 240, tmpmem + 16, state->S_24_24);
|
|
|
|
///// 24 --> 16 /////
|
|
// int32_t in[240]
|
|
// int32_t out[160]
|
|
/////
|
|
// copy state to and from input array
|
|
memcpy(tmpmem + 8, state->S_24_16, 8 * sizeof(int32_t));
|
|
memcpy(state->S_24_16, tmpmem + 248, 8 * sizeof(int32_t));
|
|
WebRtcSpl_Resample48khzTo32khz(tmpmem + 8, tmpmem, 80);
|
|
|
|
///// 16 --> 8 /////
|
|
// int32_t in[160]
|
|
// int16_t out[80]
|
|
/////
|
|
WebRtcSpl_DownBy2IntToShort(tmpmem, 160, out, state->S_16_8);
|
|
}
|
|
|
|
// initialize state of 48 -> 8 resampler
|
|
void WebRtcSpl_ResetResample48khzTo8khz(WebRtcSpl_State48khzTo8khz* state)
|
|
{
|
|
memset(state->S_48_24, 0, 8 * sizeof(int32_t));
|
|
memset(state->S_24_24, 0, 16 * sizeof(int32_t));
|
|
memset(state->S_24_16, 0, 8 * sizeof(int32_t));
|
|
memset(state->S_16_8, 0, 8 * sizeof(int32_t));
|
|
}
|
|
|
|
////////////////////////////
|
|
///// 8 kHz -> 48 kHz /////
|
|
////////////////////////////
|
|
|
|
// 8 -> 48 resampler
|
|
void WebRtcSpl_Resample8khzTo48khz(const int16_t* in, int16_t* out,
|
|
WebRtcSpl_State8khzTo48khz* state, int32_t* tmpmem)
|
|
{
|
|
///// 8 --> 16 /////
|
|
// int16_t in[80]
|
|
// int32_t out[160]
|
|
/////
|
|
WebRtcSpl_UpBy2ShortToInt(in, 80, tmpmem + 264, state->S_8_16);
|
|
|
|
///// 16 --> 12 /////
|
|
// int32_t in[160]
|
|
// int32_t out[120]
|
|
/////
|
|
// copy state to and from input array
|
|
memcpy(tmpmem + 256, state->S_16_12, 8 * sizeof(int32_t));
|
|
memcpy(state->S_16_12, tmpmem + 416, 8 * sizeof(int32_t));
|
|
WebRtcSpl_Resample32khzTo24khz(tmpmem + 256, tmpmem + 240, 40);
|
|
|
|
///// 12 --> 24 /////
|
|
// int32_t in[120]
|
|
// int16_t out[240]
|
|
/////
|
|
WebRtcSpl_UpBy2IntToInt(tmpmem + 240, 120, tmpmem, state->S_12_24);
|
|
|
|
///// 24 --> 48 /////
|
|
// int32_t in[240]
|
|
// int16_t out[480]
|
|
/////
|
|
WebRtcSpl_UpBy2IntToShort(tmpmem, 240, out, state->S_24_48);
|
|
}
|
|
|
|
// initialize state of 8 -> 48 resampler
|
|
void WebRtcSpl_ResetResample8khzTo48khz(WebRtcSpl_State8khzTo48khz* state)
|
|
{
|
|
memset(state->S_8_16, 0, 8 * sizeof(int32_t));
|
|
memset(state->S_16_12, 0, 8 * sizeof(int32_t));
|
|
memset(state->S_12_24, 0, 8 * sizeof(int32_t));
|
|
memset(state->S_24_48, 0, 8 * sizeof(int32_t));
|
|
}
|