b7e5054414
This makes a variety of small changes to synchronize bits of code using different types, remove useless code or casts, and add explicit casts in some places previously doing implicit ones. For example: * Change a few type declarations to better match how the majority of code uses those objects. * Eliminate "< 0" check for unsigned values. * Replace "(float)sin(x)", where |x| is also a float, with "sinf(x)", and similar. * Add casts to uint32_t in many places timestamps were used and the existing code stored signed values into the unsigned objects. * Remove downcasts when the results would be passed to a larger type, e.g. calling "foo((int16_t)x)" with an int |x| when foo() takes an int instead of an int16_t. * Similarly, add casts when passing a larger type to a function taking a smaller one. * Add casts to int16_t when doing something like "int16_t = int16_t + int16_t" as the "+" operation would implicitly upconvert to int, and similar. * Use "false" instead of "0" for setting a bool. * Shift a few temp types when doing a multi-stage calculation involving typecasts, so as to put the most logical/semantically correct type possible into the temps. For example, when doing "int foo = int + int; size_t bar = (size_t)foo + size_t;", we might change |foo| to a size_t and move the cast if it makes more sense for |foo| to be represented as a size_t. BUG=none R=andrew@webrtc.org, asapersson@webrtc.org, henrika@webrtc.org, juberti@webrtc.org, kwiberg@webrtc.org TBR=andrew, asapersson, henrika Review URL: https://codereview.webrtc.org/1168753002 Cr-Commit-Position: refs/heads/master@{#9419}
47 lines
1.3 KiB
C
47 lines
1.3 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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* This file contains the function WebRtcSpl_GetScalingSquare().
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* The description header can be found in signal_processing_library.h
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*
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*/
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#include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
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int16_t WebRtcSpl_GetScalingSquare(int16_t* in_vector,
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int in_vector_length,
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int times)
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{
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int16_t nbits = WebRtcSpl_GetSizeInBits((uint32_t)times);
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int i;
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int16_t smax = -1;
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int16_t sabs;
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int16_t *sptr = in_vector;
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int16_t t;
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int looptimes = in_vector_length;
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for (i = looptimes; i > 0; i--)
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{
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sabs = (*sptr > 0 ? *sptr++ : -*sptr++);
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smax = (sabs > smax ? sabs : smax);
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}
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t = WebRtcSpl_NormW32(WEBRTC_SPL_MUL(smax, smax));
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if (smax == 0)
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{
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return 0; // Since norm(0) returns 0
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} else
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{
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return (t > nbits) ? 0 : nbits - t;
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}
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}
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