mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-22 16:07:30 +00:00
52 lines
1.5 KiB
C
52 lines
1.5 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/******************************************************************
|
||
|
|
|
||
|
|
iLBC Speech Coder ANSI-C Source Code
|
||
|
|
|
||
|
|
WebRtcIlbcfix_InterpolateSamples.c
|
||
|
|
|
||
|
|
******************************************************************/
|
||
|
|
|
||
|
|
#include "defines.h"
|
||
|
|
#include "constants.h"
|
||
|
|
|
||
|
|
void WebRtcIlbcfix_InterpolateSamples(
|
||
|
|
int16_t *interpSamples, /* (o) The interpolated samples */
|
||
|
|
int16_t *CBmem, /* (i) The CB memory */
|
||
|
|
int16_t lMem /* (i) Length of the CB memory */
|
||
|
|
) {
|
||
|
|
int16_t *ppi, *ppo, i, j, temp1, temp2;
|
||
|
|
int16_t *tmpPtr;
|
||
|
|
|
||
|
|
/* Calculate the 20 vectors of interpolated samples (4 samples each)
|
||
|
|
that are used in the codebooks for lag 20 to 39 */
|
||
|
|
tmpPtr = interpSamples;
|
||
|
|
for (j=0; j<20; j++) {
|
||
|
|
temp1 = 0;
|
||
|
|
temp2 = 3;
|
||
|
|
ppo = CBmem+lMem-4;
|
||
|
|
ppi = CBmem+lMem-j-24;
|
||
|
|
for (i=0; i<4; i++) {
|
||
|
|
|
||
|
|
*tmpPtr++ = (int16_t)WEBRTC_SPL_MUL_16_16_RSFT(WebRtcIlbcfix_kAlpha[temp2],*ppo, 15) +
|
||
|
|
(int16_t)WEBRTC_SPL_MUL_16_16_RSFT(WebRtcIlbcfix_kAlpha[temp1], *ppi, 15);
|
||
|
|
|
||
|
|
ppo++;
|
||
|
|
ppi++;
|
||
|
|
temp1++;
|
||
|
|
temp2--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|