506 lines
16 KiB
C
506 lines
16 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 the resampling functions for 22 kHz.
|
|
* The description header can be found in signal_processing_library.h
|
|
*
|
|
*/
|
|
|
|
#include "common_audio/signal_processing/include/signal_processing_library.h"
|
|
#include "common_audio/signal_processing/resample_by_2_internal.h"
|
|
|
|
// Declaration of internally used functions
|
|
static void WebRtcSpl_32khzTo22khzIntToShort(const int32_t *In, int16_t *Out,
|
|
int32_t K);
|
|
|
|
void WebRtcSpl_32khzTo22khzIntToInt(const int32_t *In, int32_t *Out,
|
|
int32_t K);
|
|
|
|
// interpolation coefficients
|
|
static const int16_t kCoefficients32To22[5][9] = {
|
|
{127, -712, 2359, -6333, 23456, 16775, -3695, 945, -154},
|
|
{-39, 230, -830, 2785, 32366, -2324, 760, -218, 38},
|
|
{117, -663, 2222, -6133, 26634, 13070, -3174, 831, -137},
|
|
{-77, 457, -1677, 5958, 31175, -4136, 1405, -408, 71},
|
|
{ 98, -560, 1900, -5406, 29240, 9423, -2480, 663, -110}
|
|
};
|
|
|
|
//////////////////////
|
|
// 22 kHz -> 16 kHz //
|
|
//////////////////////
|
|
|
|
// number of subblocks; options: 1, 2, 4, 5, 10
|
|
#define SUB_BLOCKS_22_16 5
|
|
|
|
// 22 -> 16 resampler
|
|
void WebRtcSpl_Resample22khzTo16khz(const int16_t* in, int16_t* out,
|
|
WebRtcSpl_State22khzTo16khz* state, int32_t* tmpmem)
|
|
{
|
|
int k;
|
|
|
|
// process two blocks of 10/SUB_BLOCKS_22_16 ms (to reduce temp buffer size)
|
|
for (k = 0; k < SUB_BLOCKS_22_16; k++)
|
|
{
|
|
///// 22 --> 44 /////
|
|
// int16_t in[220/SUB_BLOCKS_22_16]
|
|
// int32_t out[440/SUB_BLOCKS_22_16]
|
|
/////
|
|
WebRtcSpl_UpBy2ShortToInt(in, 220 / SUB_BLOCKS_22_16, tmpmem + 16, state->S_22_44);
|
|
|
|
///// 44 --> 32 /////
|
|
// int32_t in[440/SUB_BLOCKS_22_16]
|
|
// int32_t out[320/SUB_BLOCKS_22_16]
|
|
/////
|
|
// copy state to and from input array
|
|
tmpmem[8] = state->S_44_32[0];
|
|
tmpmem[9] = state->S_44_32[1];
|
|
tmpmem[10] = state->S_44_32[2];
|
|
tmpmem[11] = state->S_44_32[3];
|
|
tmpmem[12] = state->S_44_32[4];
|
|
tmpmem[13] = state->S_44_32[5];
|
|
tmpmem[14] = state->S_44_32[6];
|
|
tmpmem[15] = state->S_44_32[7];
|
|
state->S_44_32[0] = tmpmem[440 / SUB_BLOCKS_22_16 + 8];
|
|
state->S_44_32[1] = tmpmem[440 / SUB_BLOCKS_22_16 + 9];
|
|
state->S_44_32[2] = tmpmem[440 / SUB_BLOCKS_22_16 + 10];
|
|
state->S_44_32[3] = tmpmem[440 / SUB_BLOCKS_22_16 + 11];
|
|
state->S_44_32[4] = tmpmem[440 / SUB_BLOCKS_22_16 + 12];
|
|
state->S_44_32[5] = tmpmem[440 / SUB_BLOCKS_22_16 + 13];
|
|
state->S_44_32[6] = tmpmem[440 / SUB_BLOCKS_22_16 + 14];
|
|
state->S_44_32[7] = tmpmem[440 / SUB_BLOCKS_22_16 + 15];
|
|
|
|
WebRtcSpl_Resample44khzTo32khz(tmpmem + 8, tmpmem, 40 / SUB_BLOCKS_22_16);
|
|
|
|
///// 32 --> 16 /////
|
|
// int32_t in[320/SUB_BLOCKS_22_16]
|
|
// int32_t out[160/SUB_BLOCKS_22_16]
|
|
/////
|
|
WebRtcSpl_DownBy2IntToShort(tmpmem, 320 / SUB_BLOCKS_22_16, out, state->S_32_16);
|
|
|
|
// move input/output pointers 10/SUB_BLOCKS_22_16 ms seconds ahead
|
|
in += 220 / SUB_BLOCKS_22_16;
|
|
out += 160 / SUB_BLOCKS_22_16;
|
|
}
|
|
}
|
|
|
|
// initialize state of 22 -> 16 resampler
|
|
void WebRtcSpl_ResetResample22khzTo16khz(WebRtcSpl_State22khzTo16khz* state)
|
|
{
|
|
int k;
|
|
for (k = 0; k < 8; k++)
|
|
{
|
|
state->S_22_44[k] = 0;
|
|
state->S_44_32[k] = 0;
|
|
state->S_32_16[k] = 0;
|
|
}
|
|
}
|
|
|
|
//////////////////////
|
|
// 16 kHz -> 22 kHz //
|
|
//////////////////////
|
|
|
|
// number of subblocks; options: 1, 2, 4, 5, 10
|
|
#define SUB_BLOCKS_16_22 4
|
|
|
|
// 16 -> 22 resampler
|
|
void WebRtcSpl_Resample16khzTo22khz(const int16_t* in, int16_t* out,
|
|
WebRtcSpl_State16khzTo22khz* state, int32_t* tmpmem)
|
|
{
|
|
int k;
|
|
|
|
// process two blocks of 10/SUB_BLOCKS_16_22 ms (to reduce temp buffer size)
|
|
for (k = 0; k < SUB_BLOCKS_16_22; k++)
|
|
{
|
|
///// 16 --> 32 /////
|
|
// int16_t in[160/SUB_BLOCKS_16_22]
|
|
// int32_t out[320/SUB_BLOCKS_16_22]
|
|
/////
|
|
WebRtcSpl_UpBy2ShortToInt(in, 160 / SUB_BLOCKS_16_22, tmpmem + 8, state->S_16_32);
|
|
|
|
///// 32 --> 22 /////
|
|
// int32_t in[320/SUB_BLOCKS_16_22]
|
|
// int32_t out[220/SUB_BLOCKS_16_22]
|
|
/////
|
|
// copy state to and from input array
|
|
tmpmem[0] = state->S_32_22[0];
|
|
tmpmem[1] = state->S_32_22[1];
|
|
tmpmem[2] = state->S_32_22[2];
|
|
tmpmem[3] = state->S_32_22[3];
|
|
tmpmem[4] = state->S_32_22[4];
|
|
tmpmem[5] = state->S_32_22[5];
|
|
tmpmem[6] = state->S_32_22[6];
|
|
tmpmem[7] = state->S_32_22[7];
|
|
state->S_32_22[0] = tmpmem[320 / SUB_BLOCKS_16_22];
|
|
state->S_32_22[1] = tmpmem[320 / SUB_BLOCKS_16_22 + 1];
|
|
state->S_32_22[2] = tmpmem[320 / SUB_BLOCKS_16_22 + 2];
|
|
state->S_32_22[3] = tmpmem[320 / SUB_BLOCKS_16_22 + 3];
|
|
state->S_32_22[4] = tmpmem[320 / SUB_BLOCKS_16_22 + 4];
|
|
state->S_32_22[5] = tmpmem[320 / SUB_BLOCKS_16_22 + 5];
|
|
state->S_32_22[6] = tmpmem[320 / SUB_BLOCKS_16_22 + 6];
|
|
state->S_32_22[7] = tmpmem[320 / SUB_BLOCKS_16_22 + 7];
|
|
|
|
WebRtcSpl_32khzTo22khzIntToShort(tmpmem, out, 20 / SUB_BLOCKS_16_22);
|
|
|
|
// move input/output pointers 10/SUB_BLOCKS_16_22 ms seconds ahead
|
|
in += 160 / SUB_BLOCKS_16_22;
|
|
out += 220 / SUB_BLOCKS_16_22;
|
|
}
|
|
}
|
|
|
|
// initialize state of 16 -> 22 resampler
|
|
void WebRtcSpl_ResetResample16khzTo22khz(WebRtcSpl_State16khzTo22khz* state)
|
|
{
|
|
int k;
|
|
for (k = 0; k < 8; k++)
|
|
{
|
|
state->S_16_32[k] = 0;
|
|
state->S_32_22[k] = 0;
|
|
}
|
|
}
|
|
|
|
//////////////////////
|
|
// 22 kHz -> 8 kHz //
|
|
//////////////////////
|
|
|
|
// number of subblocks; options: 1, 2, 5, 10
|
|
#define SUB_BLOCKS_22_8 2
|
|
|
|
// 22 -> 8 resampler
|
|
void WebRtcSpl_Resample22khzTo8khz(const int16_t* in, int16_t* out,
|
|
WebRtcSpl_State22khzTo8khz* state, int32_t* tmpmem)
|
|
{
|
|
int k;
|
|
|
|
// process two blocks of 10/SUB_BLOCKS_22_8 ms (to reduce temp buffer size)
|
|
for (k = 0; k < SUB_BLOCKS_22_8; k++)
|
|
{
|
|
///// 22 --> 22 lowpass /////
|
|
// int16_t in[220/SUB_BLOCKS_22_8]
|
|
// int32_t out[220/SUB_BLOCKS_22_8]
|
|
/////
|
|
WebRtcSpl_LPBy2ShortToInt(in, 220 / SUB_BLOCKS_22_8, tmpmem + 16, state->S_22_22);
|
|
|
|
///// 22 --> 16 /////
|
|
// int32_t in[220/SUB_BLOCKS_22_8]
|
|
// int32_t out[160/SUB_BLOCKS_22_8]
|
|
/////
|
|
// copy state to and from input array
|
|
tmpmem[8] = state->S_22_16[0];
|
|
tmpmem[9] = state->S_22_16[1];
|
|
tmpmem[10] = state->S_22_16[2];
|
|
tmpmem[11] = state->S_22_16[3];
|
|
tmpmem[12] = state->S_22_16[4];
|
|
tmpmem[13] = state->S_22_16[5];
|
|
tmpmem[14] = state->S_22_16[6];
|
|
tmpmem[15] = state->S_22_16[7];
|
|
state->S_22_16[0] = tmpmem[220 / SUB_BLOCKS_22_8 + 8];
|
|
state->S_22_16[1] = tmpmem[220 / SUB_BLOCKS_22_8 + 9];
|
|
state->S_22_16[2] = tmpmem[220 / SUB_BLOCKS_22_8 + 10];
|
|
state->S_22_16[3] = tmpmem[220 / SUB_BLOCKS_22_8 + 11];
|
|
state->S_22_16[4] = tmpmem[220 / SUB_BLOCKS_22_8 + 12];
|
|
state->S_22_16[5] = tmpmem[220 / SUB_BLOCKS_22_8 + 13];
|
|
state->S_22_16[6] = tmpmem[220 / SUB_BLOCKS_22_8 + 14];
|
|
state->S_22_16[7] = tmpmem[220 / SUB_BLOCKS_22_8 + 15];
|
|
|
|
WebRtcSpl_Resample44khzTo32khz(tmpmem + 8, tmpmem, 20 / SUB_BLOCKS_22_8);
|
|
|
|
///// 16 --> 8 /////
|
|
// int32_t in[160/SUB_BLOCKS_22_8]
|
|
// int32_t out[80/SUB_BLOCKS_22_8]
|
|
/////
|
|
WebRtcSpl_DownBy2IntToShort(tmpmem, 160 / SUB_BLOCKS_22_8, out, state->S_16_8);
|
|
|
|
// move input/output pointers 10/SUB_BLOCKS_22_8 ms seconds ahead
|
|
in += 220 / SUB_BLOCKS_22_8;
|
|
out += 80 / SUB_BLOCKS_22_8;
|
|
}
|
|
}
|
|
|
|
// initialize state of 22 -> 8 resampler
|
|
void WebRtcSpl_ResetResample22khzTo8khz(WebRtcSpl_State22khzTo8khz* state)
|
|
{
|
|
int k;
|
|
for (k = 0; k < 8; k++)
|
|
{
|
|
state->S_22_22[k] = 0;
|
|
state->S_22_22[k + 8] = 0;
|
|
state->S_22_16[k] = 0;
|
|
state->S_16_8[k] = 0;
|
|
}
|
|
}
|
|
|
|
//////////////////////
|
|
// 8 kHz -> 22 kHz //
|
|
//////////////////////
|
|
|
|
// number of subblocks; options: 1, 2, 5, 10
|
|
#define SUB_BLOCKS_8_22 2
|
|
|
|
// 8 -> 22 resampler
|
|
void WebRtcSpl_Resample8khzTo22khz(const int16_t* in, int16_t* out,
|
|
WebRtcSpl_State8khzTo22khz* state, int32_t* tmpmem)
|
|
{
|
|
int k;
|
|
|
|
// process two blocks of 10/SUB_BLOCKS_8_22 ms (to reduce temp buffer size)
|
|
for (k = 0; k < SUB_BLOCKS_8_22; k++)
|
|
{
|
|
///// 8 --> 16 /////
|
|
// int16_t in[80/SUB_BLOCKS_8_22]
|
|
// int32_t out[160/SUB_BLOCKS_8_22]
|
|
/////
|
|
WebRtcSpl_UpBy2ShortToInt(in, 80 / SUB_BLOCKS_8_22, tmpmem + 18, state->S_8_16);
|
|
|
|
///// 16 --> 11 /////
|
|
// int32_t in[160/SUB_BLOCKS_8_22]
|
|
// int32_t out[110/SUB_BLOCKS_8_22]
|
|
/////
|
|
// copy state to and from input array
|
|
tmpmem[10] = state->S_16_11[0];
|
|
tmpmem[11] = state->S_16_11[1];
|
|
tmpmem[12] = state->S_16_11[2];
|
|
tmpmem[13] = state->S_16_11[3];
|
|
tmpmem[14] = state->S_16_11[4];
|
|
tmpmem[15] = state->S_16_11[5];
|
|
tmpmem[16] = state->S_16_11[6];
|
|
tmpmem[17] = state->S_16_11[7];
|
|
state->S_16_11[0] = tmpmem[160 / SUB_BLOCKS_8_22 + 10];
|
|
state->S_16_11[1] = tmpmem[160 / SUB_BLOCKS_8_22 + 11];
|
|
state->S_16_11[2] = tmpmem[160 / SUB_BLOCKS_8_22 + 12];
|
|
state->S_16_11[3] = tmpmem[160 / SUB_BLOCKS_8_22 + 13];
|
|
state->S_16_11[4] = tmpmem[160 / SUB_BLOCKS_8_22 + 14];
|
|
state->S_16_11[5] = tmpmem[160 / SUB_BLOCKS_8_22 + 15];
|
|
state->S_16_11[6] = tmpmem[160 / SUB_BLOCKS_8_22 + 16];
|
|
state->S_16_11[7] = tmpmem[160 / SUB_BLOCKS_8_22 + 17];
|
|
|
|
WebRtcSpl_32khzTo22khzIntToInt(tmpmem + 10, tmpmem, 10 / SUB_BLOCKS_8_22);
|
|
|
|
///// 11 --> 22 /////
|
|
// int32_t in[110/SUB_BLOCKS_8_22]
|
|
// int16_t out[220/SUB_BLOCKS_8_22]
|
|
/////
|
|
WebRtcSpl_UpBy2IntToShort(tmpmem, 110 / SUB_BLOCKS_8_22, out, state->S_11_22);
|
|
|
|
// move input/output pointers 10/SUB_BLOCKS_8_22 ms seconds ahead
|
|
in += 80 / SUB_BLOCKS_8_22;
|
|
out += 220 / SUB_BLOCKS_8_22;
|
|
}
|
|
}
|
|
|
|
// initialize state of 8 -> 22 resampler
|
|
void WebRtcSpl_ResetResample8khzTo22khz(WebRtcSpl_State8khzTo22khz* state)
|
|
{
|
|
int k;
|
|
for (k = 0; k < 8; k++)
|
|
{
|
|
state->S_8_16[k] = 0;
|
|
state->S_16_11[k] = 0;
|
|
state->S_11_22[k] = 0;
|
|
}
|
|
}
|
|
|
|
// compute two inner-products and store them to output array
|
|
static void WebRtcSpl_DotProdIntToInt(const int32_t* in1, const int32_t* in2,
|
|
const int16_t* coef_ptr, int32_t* out1,
|
|
int32_t* out2)
|
|
{
|
|
int32_t tmp1 = 16384;
|
|
int32_t tmp2 = 16384;
|
|
int16_t coef;
|
|
|
|
coef = coef_ptr[0];
|
|
tmp1 += coef * in1[0];
|
|
tmp2 += coef * in2[-0];
|
|
|
|
coef = coef_ptr[1];
|
|
tmp1 += coef * in1[1];
|
|
tmp2 += coef * in2[-1];
|
|
|
|
coef = coef_ptr[2];
|
|
tmp1 += coef * in1[2];
|
|
tmp2 += coef * in2[-2];
|
|
|
|
coef = coef_ptr[3];
|
|
tmp1 += coef * in1[3];
|
|
tmp2 += coef * in2[-3];
|
|
|
|
coef = coef_ptr[4];
|
|
tmp1 += coef * in1[4];
|
|
tmp2 += coef * in2[-4];
|
|
|
|
coef = coef_ptr[5];
|
|
tmp1 += coef * in1[5];
|
|
tmp2 += coef * in2[-5];
|
|
|
|
coef = coef_ptr[6];
|
|
tmp1 += coef * in1[6];
|
|
tmp2 += coef * in2[-6];
|
|
|
|
coef = coef_ptr[7];
|
|
tmp1 += coef * in1[7];
|
|
tmp2 += coef * in2[-7];
|
|
|
|
coef = coef_ptr[8];
|
|
*out1 = tmp1 + coef * in1[8];
|
|
*out2 = tmp2 + coef * in2[-8];
|
|
}
|
|
|
|
// compute two inner-products and store them to output array
|
|
static void WebRtcSpl_DotProdIntToShort(const int32_t* in1, const int32_t* in2,
|
|
const int16_t* coef_ptr, int16_t* out1,
|
|
int16_t* out2)
|
|
{
|
|
int32_t tmp1 = 16384;
|
|
int32_t tmp2 = 16384;
|
|
int16_t coef;
|
|
|
|
coef = coef_ptr[0];
|
|
tmp1 += coef * in1[0];
|
|
tmp2 += coef * in2[-0];
|
|
|
|
coef = coef_ptr[1];
|
|
tmp1 += coef * in1[1];
|
|
tmp2 += coef * in2[-1];
|
|
|
|
coef = coef_ptr[2];
|
|
tmp1 += coef * in1[2];
|
|
tmp2 += coef * in2[-2];
|
|
|
|
coef = coef_ptr[3];
|
|
tmp1 += coef * in1[3];
|
|
tmp2 += coef * in2[-3];
|
|
|
|
coef = coef_ptr[4];
|
|
tmp1 += coef * in1[4];
|
|
tmp2 += coef * in2[-4];
|
|
|
|
coef = coef_ptr[5];
|
|
tmp1 += coef * in1[5];
|
|
tmp2 += coef * in2[-5];
|
|
|
|
coef = coef_ptr[6];
|
|
tmp1 += coef * in1[6];
|
|
tmp2 += coef * in2[-6];
|
|
|
|
coef = coef_ptr[7];
|
|
tmp1 += coef * in1[7];
|
|
tmp2 += coef * in2[-7];
|
|
|
|
coef = coef_ptr[8];
|
|
tmp1 += coef * in1[8];
|
|
tmp2 += coef * in2[-8];
|
|
|
|
// scale down, round and saturate
|
|
tmp1 >>= 15;
|
|
if (tmp1 > (int32_t)0x00007FFF)
|
|
tmp1 = 0x00007FFF;
|
|
if (tmp1 < (int32_t)0xFFFF8000)
|
|
tmp1 = 0xFFFF8000;
|
|
tmp2 >>= 15;
|
|
if (tmp2 > (int32_t)0x00007FFF)
|
|
tmp2 = 0x00007FFF;
|
|
if (tmp2 < (int32_t)0xFFFF8000)
|
|
tmp2 = 0xFFFF8000;
|
|
*out1 = (int16_t)tmp1;
|
|
*out2 = (int16_t)tmp2;
|
|
}
|
|
|
|
// Resampling ratio: 11/16
|
|
// input: int32_t (normalized, not saturated) :: size 16 * K
|
|
// output: int32_t (shifted 15 positions to the left, + offset 16384) :: size 11 * K
|
|
// K: Number of blocks
|
|
|
|
void WebRtcSpl_32khzTo22khzIntToInt(const int32_t* In,
|
|
int32_t* Out,
|
|
int32_t K)
|
|
{
|
|
/////////////////////////////////////////////////////////////
|
|
// Filter operation:
|
|
//
|
|
// Perform resampling (16 input samples -> 11 output samples);
|
|
// process in sub blocks of size 16 samples.
|
|
int32_t m;
|
|
|
|
for (m = 0; m < K; m++)
|
|
{
|
|
// first output sample
|
|
Out[0] = ((int32_t)In[3] << 15) + (1 << 14);
|
|
|
|
// sum and accumulate filter coefficients and input samples
|
|
WebRtcSpl_DotProdIntToInt(&In[0], &In[22], kCoefficients32To22[0], &Out[1], &Out[10]);
|
|
|
|
// sum and accumulate filter coefficients and input samples
|
|
WebRtcSpl_DotProdIntToInt(&In[2], &In[20], kCoefficients32To22[1], &Out[2], &Out[9]);
|
|
|
|
// sum and accumulate filter coefficients and input samples
|
|
WebRtcSpl_DotProdIntToInt(&In[3], &In[19], kCoefficients32To22[2], &Out[3], &Out[8]);
|
|
|
|
// sum and accumulate filter coefficients and input samples
|
|
WebRtcSpl_DotProdIntToInt(&In[5], &In[17], kCoefficients32To22[3], &Out[4], &Out[7]);
|
|
|
|
// sum and accumulate filter coefficients and input samples
|
|
WebRtcSpl_DotProdIntToInt(&In[6], &In[16], kCoefficients32To22[4], &Out[5], &Out[6]);
|
|
|
|
// update pointers
|
|
In += 16;
|
|
Out += 11;
|
|
}
|
|
}
|
|
|
|
// Resampling ratio: 11/16
|
|
// input: int32_t (normalized, not saturated) :: size 16 * K
|
|
// output: int16_t (saturated) :: size 11 * K
|
|
// K: Number of blocks
|
|
|
|
void WebRtcSpl_32khzTo22khzIntToShort(const int32_t *In,
|
|
int16_t *Out,
|
|
int32_t K)
|
|
{
|
|
/////////////////////////////////////////////////////////////
|
|
// Filter operation:
|
|
//
|
|
// Perform resampling (16 input samples -> 11 output samples);
|
|
// process in sub blocks of size 16 samples.
|
|
int32_t tmp;
|
|
int32_t m;
|
|
|
|
for (m = 0; m < K; m++)
|
|
{
|
|
// first output sample
|
|
tmp = In[3];
|
|
if (tmp > (int32_t)0x00007FFF)
|
|
tmp = 0x00007FFF;
|
|
if (tmp < (int32_t)0xFFFF8000)
|
|
tmp = 0xFFFF8000;
|
|
Out[0] = (int16_t)tmp;
|
|
|
|
// sum and accumulate filter coefficients and input samples
|
|
WebRtcSpl_DotProdIntToShort(&In[0], &In[22], kCoefficients32To22[0], &Out[1], &Out[10]);
|
|
|
|
// sum and accumulate filter coefficients and input samples
|
|
WebRtcSpl_DotProdIntToShort(&In[2], &In[20], kCoefficients32To22[1], &Out[2], &Out[9]);
|
|
|
|
// sum and accumulate filter coefficients and input samples
|
|
WebRtcSpl_DotProdIntToShort(&In[3], &In[19], kCoefficients32To22[2], &Out[3], &Out[8]);
|
|
|
|
// sum and accumulate filter coefficients and input samples
|
|
WebRtcSpl_DotProdIntToShort(&In[5], &In[17], kCoefficients32To22[3], &Out[4], &Out[7]);
|
|
|
|
// sum and accumulate filter coefficients and input samples
|
|
WebRtcSpl_DotProdIntToShort(&In[6], &In[16], kCoefficients32To22[4], &Out[5], &Out[6]);
|
|
|
|
// update pointers
|
|
In += 16;
|
|
Out += 11;
|
|
}
|
|
}
|