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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}
64 lines
1.9 KiB
C
64 lines
1.9 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_Window32W32.c
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******************************************************************/
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#include "modules/audio_coding/codecs/ilbc/window32_w32.h"
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#include "modules/audio_coding/codecs/ilbc/defines.h"
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/*----------------------------------------------------------------*
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* window multiplication
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*---------------------------------------------------------------*/
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void WebRtcIlbcfix_Window32W32(
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int32_t *z, /* Output */
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int32_t *x, /* Input (same domain as Output)*/
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const int32_t *y, /* Q31 Window */
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size_t N /* length to process */
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) {
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size_t i;
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int16_t x_low, x_hi, y_low, y_hi;
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int16_t left_shifts;
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int32_t temp;
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left_shifts = (int16_t)WebRtcSpl_NormW32(x[0]);
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WebRtcSpl_VectorBitShiftW32(x, N, x, (int16_t)(-left_shifts));
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/* The double precision numbers use a special representation:
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* w32 = hi<<16 + lo<<1
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*/
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for (i = 0; i < N; i++) {
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/* Extract higher bytes */
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x_hi = (int16_t)(x[i] >> 16);
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y_hi = (int16_t)(y[i] >> 16);
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/* Extract lower bytes, defined as (w32 - hi<<16)>>1 */
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x_low = (int16_t)((x[i] - (x_hi << 16)) >> 1);
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y_low = (int16_t)((y[i] - (y_hi << 16)) >> 1);
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/* Calculate z by a 32 bit multiplication using both low and high from x and y */
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temp = ((x_hi * y_hi) << 1) + ((x_hi * y_low) >> 14);
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z[i] = temp + ((x_low * y_hi) >> 14);
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}
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WebRtcSpl_VectorBitShiftW32(z, N, z, left_shifts);
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return;
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}
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