OpenShot Library | libopenshot-audio
0.2.0
juce_AudioSubsectionReader.h
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/** @weakgroup juce_audio_formats-format
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* @{
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*/
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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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By using JUCE, you agree to the terms of both the JUCE 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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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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/**
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This class is used to wrap an AudioFormatReader and only read from a
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subsection of the file.
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So if you have a reader which can read a 1000 sample file, you could wrap it
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in one of these to only access, e.g. samples 100 to 200, and any samples
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outside that will come back as 0. Accessing sample 0 from this reader will
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actually read the first sample from the other's subsection, which might
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be at a non-zero position.
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@see AudioFormatReader
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@tags{Audio}
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*/
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class
JUCE_API
AudioSubsectionReader
:
public
AudioFormatReader
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{
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public
:
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//==============================================================================
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/** Creates an AudioSubsectionReader for a given data source.
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@param sourceReader the source reader from which we'll be taking data
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@param subsectionStartSample the sample within the source reader which will be
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mapped onto sample 0 for this reader.
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@param subsectionLength the number of samples from the source that will
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make up the subsection. If this reader is asked for
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any samples beyond this region, it will return zero.
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@param deleteSourceWhenDeleted if true, the sourceReader object will be deleted when
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this object is deleted.
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*/
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AudioSubsectionReader
(
AudioFormatReader
*
sourceReader
,
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int64
subsectionStartSample
,
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int64
subsectionLength
,
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bool
deleteSourceWhenDeleted);
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/** Destructor. */
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~AudioSubsectionReader
()
override
;
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//==============================================================================
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bool
readSamples (
int
**
destSamples
,
int
numDestChannels
,
int
startOffsetInDestBuffer
,
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int64
startSampleInFile
,
int
numSamples)
override
;
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void
readMaxLevels (int64 startSample, int64 numSamples,
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Range<float>
* results,
int
numChannelsToRead
)
override
;
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private
:
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//==============================================================================
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AudioFormatReader
*
const
source;
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int64 startSample, length;
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const
bool
deleteSourceWhenDeleted;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (
AudioSubsectionReader
)
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};
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}
// namespace juce
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/** @}*/
juce::Array
Holds a resizable array of primitive or copy-by-value objects.
Definition
juce_Array.h:60
juce::AudioFormatReader
Reads samples from an audio file stream.
Definition
juce_AudioFormatReader.h:49
juce::AudioSubsectionReader
This class is used to wrap an AudioFormatReader and only read from a subsection of the file.
Definition
juce_AudioSubsectionReader.h:50
JUCE_API
#define JUCE_API
This macro is added to all JUCE public class declarations.
Definition
juce_StandardHeader.h:143
juce_audio_formats
format
juce_AudioSubsectionReader.h
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