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}
63 lines
1.7 KiB
C
63 lines
1.7 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_Vq4.c
|
|
|
|
******************************************************************/
|
|
|
|
#include "modules/audio_coding/codecs/ilbc/vq4.h"
|
|
|
|
#include "modules/audio_coding/codecs/ilbc/constants.h"
|
|
|
|
/*----------------------------------------------------------------*
|
|
* vector quantization
|
|
*---------------------------------------------------------------*/
|
|
|
|
void WebRtcIlbcfix_Vq4(
|
|
int16_t *Xq, /* quantized vector (Q13) */
|
|
int16_t *index,
|
|
int16_t *CB, /* codebook in Q13 */
|
|
int16_t *X, /* vector to quantize (Q13) */
|
|
int16_t n_cb
|
|
){
|
|
int16_t i, j;
|
|
int16_t pos, minindex=0;
|
|
int16_t tmp;
|
|
int32_t dist, mindist;
|
|
|
|
pos = 0;
|
|
mindist = WEBRTC_SPL_WORD32_MAX; /* start value */
|
|
|
|
/* Find the codebook with the lowest square distance */
|
|
for (j = 0; j < n_cb; j++) {
|
|
tmp = X[0] - CB[pos];
|
|
dist = tmp * tmp;
|
|
for (i = 1; i < 4; i++) {
|
|
tmp = X[i] - CB[pos + i];
|
|
dist += tmp * tmp;
|
|
}
|
|
|
|
if (dist < mindist) {
|
|
mindist = dist;
|
|
minindex = j;
|
|
}
|
|
pos += 4;
|
|
}
|
|
|
|
/* Store the quantized codebook and the index */
|
|
for (i = 0; i < 4; i++) {
|
|
Xq[i] = CB[minindex*4 + i];
|
|
}
|
|
*index = minindex;
|
|
}
|