dce40cf804
use of int16_t/uint16_t. This is the upshot of a recommendation by henrik.lundin and kwiberg on an original small change ( https://webrtc-codereview.appspot.com/42569004/#ps1 ) to stop using int16_t just because values could fit in it, and is similar in nature to a previous "mass change to use size_t more" ( https://webrtc-codereview.appspot.com/23129004/ ) which also needed to be split up for review but to land all at once, since, like adding "const", such changes tend to cause a lot of transitive effects. This was be reviewed and approved in pieces: https://codereview.webrtc.org/1224093003 https://codereview.webrtc.org/1224123002 https://codereview.webrtc.org/1224163002 https://codereview.webrtc.org/1225133003 https://codereview.webrtc.org/1225173002 https://codereview.webrtc.org/1227163003 https://codereview.webrtc.org/1227203003 https://codereview.webrtc.org/1227213002 https://codereview.webrtc.org/1227893002 https://codereview.webrtc.org/1228793004 https://codereview.webrtc.org/1228803003 https://codereview.webrtc.org/1228823002 https://codereview.webrtc.org/1228823003 https://codereview.webrtc.org/1228843002 https://codereview.webrtc.org/1230693002 https://codereview.webrtc.org/1231713002 The change is being landed as TBR to all the folks who reviewed the above. BUG=chromium:81439 TEST=none R=andrew@webrtc.org, pbos@webrtc.org TBR=aluebs, andrew, asapersson, henrika, hlundin, jan.skoglund, kwiberg, minyue, pbos, pthatcher Review URL: https://codereview.webrtc.org/1230503003 . Cr-Commit-Position: refs/heads/master@{#9768}
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/******************************************************************
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iLBC Speech Coder ANSI-C Source Code
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WebRtcIlbcfix_InterpolateSamples.c
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******************************************************************/
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#include "defines.h"
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#include "constants.h"
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void WebRtcIlbcfix_InterpolateSamples(
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int16_t *interpSamples, /* (o) The interpolated samples */
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int16_t *CBmem, /* (i) The CB memory */
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size_t lMem /* (i) Length of the CB memory */
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) {
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int16_t *ppi, *ppo, i, j, temp1, temp2;
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int16_t *tmpPtr;
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/* Calculate the 20 vectors of interpolated samples (4 samples each)
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that are used in the codebooks for lag 20 to 39 */
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tmpPtr = interpSamples;
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for (j=0; j<20; j++) {
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temp1 = 0;
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temp2 = 3;
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ppo = CBmem+lMem-4;
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ppi = CBmem+lMem-j-24;
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for (i=0; i<4; i++) {
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*tmpPtr++ = (int16_t)((WebRtcIlbcfix_kAlpha[temp2] * *ppo) >> 15) +
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(int16_t)((WebRtcIlbcfix_kAlpha[temp1] * *ppi) >> 15);
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ppo++;
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ppi++;
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temp1++;
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temp2--;
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}
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}
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return;
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}
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