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}
47 lines
1.3 KiB
C
47 lines
1.3 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 function WebRtcSpl_GetScalingSquare().
|
|
* The description header can be found in signal_processing_library.h
|
|
*
|
|
*/
|
|
|
|
#include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
|
|
|
|
int16_t WebRtcSpl_GetScalingSquare(int16_t* in_vector,
|
|
size_t in_vector_length,
|
|
size_t times)
|
|
{
|
|
int16_t nbits = WebRtcSpl_GetSizeInBits((uint32_t)times);
|
|
size_t i;
|
|
int16_t smax = -1;
|
|
int16_t sabs;
|
|
int16_t *sptr = in_vector;
|
|
int16_t t;
|
|
size_t looptimes = in_vector_length;
|
|
|
|
for (i = looptimes; i > 0; i--)
|
|
{
|
|
sabs = (*sptr > 0 ? *sptr++ : -*sptr++);
|
|
smax = (sabs > smax ? sabs : smax);
|
|
}
|
|
t = WebRtcSpl_NormW32(WEBRTC_SPL_MUL(smax, smax));
|
|
|
|
if (smax == 0)
|
|
{
|
|
return 0; // Since norm(0) returns 0
|
|
} else
|
|
{
|
|
return (t > nbits) ? 0 : nbits - t;
|
|
}
|
|
}
|