78 lines
1.4 KiB
C++
78 lines
1.4 KiB
C++
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/*
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* Copyright (C) 2011 Apple Inc. All rights reserved.
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*
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* This document is the property of Apple Inc.
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* It is considered confidential and proprietary.
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*
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* This document may not be reproduced or transmitted in any form,
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* in whole or in part, without the express written permission of
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* Apple Inc.
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*/
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#include "AUNull.h"
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#include "string.h"
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#include <debug.h>
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#define GENERATE_SAWTOOTH 0
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AUNull *
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AUNull::Create_AUNull(uint32_t sampleRate, uint32_t numChannels, uint32_t sampleSize)
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{
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AUNull *This = new AUNull;
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if (This)
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{
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if (This->InitWith(sampleRate, numChannels, sampleSize))
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{
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This->Initialize();
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}
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else
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{
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delete This;
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This = NULL;
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}
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}
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return This;
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}
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AUNull::AUNull()
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{
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}
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bool
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AUNull::InitWith(uint32_t sampleRate, uint32_t numChannels, uint32_t sampleSize)
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{
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mSampleRate = sampleRate;
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mNumChannels = numChannels;
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mSampleSize = sampleSize;
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return true;
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}
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AUNull::~AUNull()
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{
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}
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#if GENERATE_SAWTOOTH
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static int16_t currentValue = 0;
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static const uint32_t kFreq = 600;
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#endif
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void
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AUNull::Process(const void *inSourceP,
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void *inDestP,
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UInt32 inFramesToProcess)
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{
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#if GENERATE_SAWTOOTH
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uint16_t amountToAdd = (0x10000L * kFreq) / mSampleRate;
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int16_t *dst = static_cast<int16_t*>(inDestP);
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size_t i = 0;
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for (i = 0; i < (inFramesToProcess * mNumChannels); ++i)
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{
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*dst++ = currentValue;
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currentValue += amountToAdd;
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}
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#endif
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}
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