mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-13 22:00:47 +01:00
3111783aa1
Prior to this commit, most .c files in modules/audio_coding/codecs/ilbc don't include their corresponding headers, nor do they order #includes as per the Google Style Guide [1]. The former is especially harmful, since in C it can silently allow the function signature to diverge from its prototype, thus causing disaster at runtime. This CL fixes both issues. In effect, this allows the common_audio and modules/audio_coding:ilbc targets to be compiled with Clang's -Wmissing-prototypes, though this CL does not add that change. [1]: https://google.github.io/styleguide/cppguide.html#Names_and_Order_of_Includes Bug: webrtc:12314 Change-Id: I8299968ed3cc86ff35d9de045072b846298043af Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/198362 Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org> Commit-Queue: Timothy Gu <timothygu@chromium.org> Cr-Commit-Position: refs/heads/master@{#32896}
73 lines
2.1 KiB
C
73 lines
2.1 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_LsfCheck.c
|
|
|
|
******************************************************************/
|
|
|
|
#include "modules/audio_coding/codecs/ilbc/lsf_check.h"
|
|
|
|
#include "modules/audio_coding/codecs/ilbc/constants.h"
|
|
#include "modules/audio_coding/codecs/ilbc/defines.h"
|
|
|
|
/*----------------------------------------------------------------*
|
|
* check for stability of lsf coefficients
|
|
*---------------------------------------------------------------*/
|
|
|
|
int WebRtcIlbcfix_LsfCheck(
|
|
int16_t *lsf, /* LSF parameters */
|
|
int dim, /* dimension of LSF */
|
|
int NoAn) /* No of analysis per frame */
|
|
{
|
|
int k,n,m, Nit=2, change=0,pos;
|
|
const int16_t eps=319; /* 0.039 in Q13 (50 Hz)*/
|
|
const int16_t eps2=160; /* eps/2.0 in Q13;*/
|
|
const int16_t maxlsf=25723; /* 3.14; (4000 Hz)*/
|
|
const int16_t minlsf=82; /* 0.01; (0 Hz)*/
|
|
|
|
/* LSF separation check*/
|
|
for (n=0;n<Nit;n++) { /* Run through a 2 times */
|
|
for (m=0;m<NoAn;m++) { /* Number of analyses per frame */
|
|
for (k=0;k<(dim-1);k++) {
|
|
pos=m*dim+k;
|
|
|
|
/* Seperate coefficients with a safety margin of 50 Hz */
|
|
if ((lsf[pos+1]-lsf[pos])<eps) {
|
|
|
|
if (lsf[pos+1]<lsf[pos]) {
|
|
lsf[pos+1]= lsf[pos]+eps2;
|
|
lsf[pos]= lsf[pos+1]-eps2;
|
|
} else {
|
|
lsf[pos]-=eps2;
|
|
lsf[pos+1]+=eps2;
|
|
}
|
|
change=1;
|
|
}
|
|
|
|
/* Limit minimum and maximum LSF */
|
|
if (lsf[pos]<minlsf) {
|
|
lsf[pos]=minlsf;
|
|
change=1;
|
|
}
|
|
|
|
if (lsf[pos]>maxlsf) {
|
|
lsf[pos]=maxlsf;
|
|
change=1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return change;
|
|
}
|