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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}
48 lines
1.5 KiB
C
48 lines
1.5 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_Interpolate.c
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******************************************************************/
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#include "modules/audio_coding/codecs/ilbc/interpolate.h"
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#include "modules/audio_coding/codecs/ilbc/constants.h"
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#include "modules/audio_coding/codecs/ilbc/defines.h"
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/*----------------------------------------------------------------*
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* interpolation between vectors
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*---------------------------------------------------------------*/
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void WebRtcIlbcfix_Interpolate(
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int16_t *out, /* (o) output vector */
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int16_t *in1, /* (i) first input vector */
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int16_t *in2, /* (i) second input vector */
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int16_t coef, /* (i) weight coefficient in Q14 */
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int16_t length) /* (i) number of sample is vectors */
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{
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int i;
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int16_t invcoef;
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/*
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Performs the operation out[i] = in[i]*coef + (1-coef)*in2[i] (with rounding)
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*/
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invcoef = 16384 - coef; /* 16384 = 1.0 (Q14)*/
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for (i = 0; i < length; i++) {
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out[i] = (int16_t)((coef * in1[i] + invcoef * in2[i] + 8192) >> 14);
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}
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return;
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}
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