1e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent/* 2e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * 4e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * Use of this source code is governed by a BSD-style license 5e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * that can be found in the LICENSE file in the root of the source 6e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * tree. An additional intellectual property rights grant can be found 7e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * in the file PATENTS. All contributing project authors may 8e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * be found in the AUTHORS file in the root of the source tree. 9e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent */ 10e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 11e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 12e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent/* 13e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * This file contains resampling functions between 48 kHz and nb/wb. 14e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * The description header can be found in signal_processing_library.h 15e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent * 16e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent */ 17e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 18e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent#include <string.h> 19e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent#include "signal_processing_library.h" 20e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent#include "resample_by_2_internal.h" 21e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 22e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent//////////////////////////// 23e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent///// 48 kHz -> 16 kHz ///// 24e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent//////////////////////////// 25e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 26e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent// 48 -> 16 resampler 27e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurentvoid WebRtcSpl_Resample48khzTo16khz(const WebRtc_Word16* in, WebRtc_Word16* out, 28e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_State48khzTo16khz* state, WebRtc_Word32* tmpmem) 29e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent{ 30e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 48 --> 48(LP) ///// 31e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word16 in[480] 32e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 out[480] 33e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 34e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_LPBy2ShortToInt(in, 480, tmpmem + 16, state->S_48_48); 35e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 36e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 48 --> 32 ///// 37e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 in[480] 38e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 out[320] 39e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 40e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // copy state to and from input array 41e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memcpy(tmpmem + 8, state->S_48_32, 8 * sizeof(WebRtc_Word32)); 42e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memcpy(state->S_48_32, tmpmem + 488, 8 * sizeof(WebRtc_Word32)); 43e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_Resample48khzTo32khz(tmpmem + 8, tmpmem, 160); 44e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 45e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 32 --> 16 ///// 46e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 in[320] 47e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word16 out[160] 48e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 49e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_DownBy2IntToShort(tmpmem, 320, out, state->S_32_16); 50e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent} 51e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 52e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent// initialize state of 48 -> 16 resampler 53e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurentvoid WebRtcSpl_ResetResample48khzTo16khz(WebRtcSpl_State48khzTo16khz* state) 54e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent{ 55e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_48_48, 0, 16 * sizeof(WebRtc_Word32)); 56e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_48_32, 0, 8 * sizeof(WebRtc_Word32)); 57e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_32_16, 0, 8 * sizeof(WebRtc_Word32)); 58e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent} 59e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 60e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent//////////////////////////// 61e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent///// 16 kHz -> 48 kHz ///// 62e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent//////////////////////////// 63e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 64e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent// 16 -> 48 resampler 65e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurentvoid WebRtcSpl_Resample16khzTo48khz(const WebRtc_Word16* in, WebRtc_Word16* out, 66e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_State16khzTo48khz* state, WebRtc_Word32* tmpmem) 67e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent{ 68e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 16 --> 32 ///// 69e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word16 in[160] 70e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 out[320] 71e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 72e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_UpBy2ShortToInt(in, 160, tmpmem + 16, state->S_16_32); 73e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 74e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 32 --> 24 ///// 75e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 in[320] 76e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 out[240] 77e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // copy state to and from input array 78e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 79e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memcpy(tmpmem + 8, state->S_32_24, 8 * sizeof(WebRtc_Word32)); 80e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memcpy(state->S_32_24, tmpmem + 328, 8 * sizeof(WebRtc_Word32)); 81e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_Resample32khzTo24khz(tmpmem + 8, tmpmem, 80); 82e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 83e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 24 --> 48 ///// 84e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 in[240] 85e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word16 out[480] 86e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 87e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_UpBy2IntToShort(tmpmem, 240, out, state->S_24_48); 88e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent} 89e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 90e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent// initialize state of 16 -> 48 resampler 91e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurentvoid WebRtcSpl_ResetResample16khzTo48khz(WebRtcSpl_State16khzTo48khz* state) 92e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent{ 93e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_16_32, 0, 8 * sizeof(WebRtc_Word32)); 94e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_32_24, 0, 8 * sizeof(WebRtc_Word32)); 95e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_24_48, 0, 8 * sizeof(WebRtc_Word32)); 96e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent} 97e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 98e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent//////////////////////////// 99e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent///// 48 kHz -> 8 kHz ///// 100e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent//////////////////////////// 101e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 102e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent// 48 -> 8 resampler 103e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurentvoid WebRtcSpl_Resample48khzTo8khz(const WebRtc_Word16* in, WebRtc_Word16* out, 104e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_State48khzTo8khz* state, WebRtc_Word32* tmpmem) 105e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent{ 106e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 48 --> 24 ///// 107e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word16 in[480] 108e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 out[240] 109e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 110e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_DownBy2ShortToInt(in, 480, tmpmem + 256, state->S_48_24); 111e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 112e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 24 --> 24(LP) ///// 113e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 in[240] 114e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 out[240] 115e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 116e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_LPBy2IntToInt(tmpmem + 256, 240, tmpmem + 16, state->S_24_24); 117e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 118e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 24 --> 16 ///// 119e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 in[240] 120e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 out[160] 121e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 122e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // copy state to and from input array 123e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memcpy(tmpmem + 8, state->S_24_16, 8 * sizeof(WebRtc_Word32)); 124e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memcpy(state->S_24_16, tmpmem + 248, 8 * sizeof(WebRtc_Word32)); 125e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_Resample48khzTo32khz(tmpmem + 8, tmpmem, 80); 126e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 127e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 16 --> 8 ///// 128e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 in[160] 129e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word16 out[80] 130e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 131e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_DownBy2IntToShort(tmpmem, 160, out, state->S_16_8); 132e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent} 133e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 134e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent// initialize state of 48 -> 8 resampler 135e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurentvoid WebRtcSpl_ResetResample48khzTo8khz(WebRtcSpl_State48khzTo8khz* state) 136e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent{ 137e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_48_24, 0, 8 * sizeof(WebRtc_Word32)); 138e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_24_24, 0, 16 * sizeof(WebRtc_Word32)); 139e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_24_16, 0, 8 * sizeof(WebRtc_Word32)); 140e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_16_8, 0, 8 * sizeof(WebRtc_Word32)); 141e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent} 142e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 143e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent//////////////////////////// 144e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent///// 8 kHz -> 48 kHz ///// 145e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent//////////////////////////// 146e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 147e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent// 8 -> 48 resampler 148e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurentvoid WebRtcSpl_Resample8khzTo48khz(const WebRtc_Word16* in, WebRtc_Word16* out, 149e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_State8khzTo48khz* state, WebRtc_Word32* tmpmem) 150e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent{ 151e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 8 --> 16 ///// 152e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word16 in[80] 153e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 out[160] 154e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 155e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_UpBy2ShortToInt(in, 80, tmpmem + 264, state->S_8_16); 156e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 157e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 16 --> 12 ///// 158e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 in[160] 159e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 out[120] 160e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 161e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // copy state to and from input array 162e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memcpy(tmpmem + 256, state->S_16_12, 8 * sizeof(WebRtc_Word32)); 163e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memcpy(state->S_16_12, tmpmem + 416, 8 * sizeof(WebRtc_Word32)); 164e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_Resample32khzTo24khz(tmpmem + 256, tmpmem + 240, 40); 165e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 166e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 12 --> 24 ///// 167e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 in[120] 168e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word16 out[240] 169e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 170e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_UpBy2IntToInt(tmpmem + 240, 120, tmpmem, state->S_12_24); 171e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 172e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 24 --> 48 ///// 173e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word32 in[240] 174e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent // WebRtc_Word16 out[480] 175e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent ///// 176e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent WebRtcSpl_UpBy2IntToShort(tmpmem, 240, out, state->S_24_48); 177e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent} 178e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent 179e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent// initialize state of 8 -> 48 resampler 180e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurentvoid WebRtcSpl_ResetResample8khzTo48khz(WebRtcSpl_State8khzTo48khz* state) 181e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent{ 182e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_8_16, 0, 8 * sizeof(WebRtc_Word32)); 183e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_16_12, 0, 8 * sizeof(WebRtc_Word32)); 184e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_12_24, 0, 8 * sizeof(WebRtc_Word32)); 185e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent memset(state->S_24_48, 0, 8 * sizeof(WebRtc_Word32)); 186e48d5845c8b35de2ab73ea055c18a61fa3a9f0beEric Laurent} 187