OpenShot Audio Library | OpenShotAudio
0.3.2
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juce_ResamplingAudioSource.h
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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The code included in this file is provided under the terms of the ISC license
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http://www.isc.org/downloads/software-support-policy/isc-license. Permission
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To use, copy, modify, and/or distribute this software for any purpose with or
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without fee is hereby granted provided that the above copyright notice and
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this permission notice appear in all copies.
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace
juce
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{
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//==============================================================================
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class
JUCE_API
ResamplingAudioSource
:
public
AudioSource
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{
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public
:
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//==============================================================================
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ResamplingAudioSource
(
AudioSource
* inputSource,
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bool
deleteInputWhenDeleted
,
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int
numChannels = 2);
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~ResamplingAudioSource
()
override
;
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void
setResamplingRatio (
double
samplesInPerOutputSample
);
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double
getResamplingRatio
()
const
noexcept
{
return
ratio; }
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void
flushBuffers();
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//==============================================================================
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void
prepareToPlay (
int
samplesPerBlockExpected
,
double
sampleRate)
override
;
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void
releaseResources()
override
;
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void
getNextAudioBlock (
const
AudioSourceChannelInfo
&)
override
;
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private
:
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//==============================================================================
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OptionalScopedPointer<AudioSource>
input;
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double
ratio = 1.0, lastRatio = 1.0;
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AudioBuffer<float>
buffer;
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int
bufferPos = 0, sampsInBuffer = 0;
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double
subSampleOffset = 0.0;
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double
coefficients[6];
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SpinLock
ratioLock;
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CriticalSection
callbackLock;
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const
int
numChannels;
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HeapBlock<float*>
destBuffers;
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HeapBlock<const float*>
srcBuffers;
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void
setFilterCoefficients (
double
c1
,
double
c2
,
double
c3
,
double
c4
,
double
c5
,
double
c6
);
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void
createLowPass (
double
proportionalRate
);
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struct
FilterState
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{
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double
x1, x2, y1, y2;
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};
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HeapBlock<FilterState> filterStates;
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void
resetFilters();
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void
applyFilter (
float
* samples,
int
num, FilterState& fs);
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ResamplingAudioSource)
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};
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}
// namespace juce
juce::Array
Definition
juce_Array.h:56
juce::AudioSource
Definition
juce_AudioSource.h:110
juce::CriticalSection
Definition
juce_CriticalSection.h:43
juce::ResamplingAudioSource
Definition
juce_ResamplingAudioSource.h:35
juce::ResamplingAudioSource::getResamplingRatio
double getResamplingRatio() const noexcept
Definition
juce_ResamplingAudioSource.h:66
juce::SpinLock
Definition
juce_SpinLock.h:42
juce::AudioSourceChannelInfo
Definition
juce_AudioSource.h:33
JuceLibraryCode
modules
juce_audio_basics
sources
juce_ResamplingAudioSource.h
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