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juce_AudioFormatReaderSource.cpp
/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2022 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
By using JUCE, you agree to the terms of both the JUCE 7 End-User License
Agreement and JUCE Privacy Policy.
End User License Agreement: www.juce.com/juce-7-licence
Privacy Policy: www.juce.com/juce-privacy-policy
Or: You may also use this code under the terms of the GPL v3 (see
www.gnu.org/licenses).
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
AudioFormatReaderSource::AudioFormatReaderSource (AudioFormatReader* const r,
const bool deleteReaderWhenThisIsDeleted)
: reader (r, deleteReaderWhenThisIsDeleted),
nextPlayPos (0),
looping (false)
{
jassert (reader != nullptr);
}
AudioFormatReaderSource::~AudioFormatReaderSource() {}
int64 AudioFormatReaderSource::getTotalLength() const { return reader->lengthInSamples; }
void AudioFormatReaderSource::setNextReadPosition (int64 newPosition) { nextPlayPos = newPosition; }
void AudioFormatReaderSource::setLooping (bool shouldLoop) { looping = shouldLoop; }
int64 AudioFormatReaderSource::getNextReadPosition() const
{
return looping ? nextPlayPos % reader->lengthInSamples
: nextPlayPos;
}
void AudioFormatReaderSource::prepareToPlay (int /*samplesPerBlockExpected*/, double /*sampleRate*/) {}
void AudioFormatReaderSource::releaseResources() {}
void AudioFormatReaderSource::getNextAudioBlock (const AudioSourceChannelInfo& info)
{
if (info.numSamples > 0)
{
const int64 start = nextPlayPos;
if (looping)
{
const int64 newStart = start % reader->lengthInSamples;
const int64 newEnd = (start + info.numSamples) % reader->lengthInSamples;
if (newEnd > newStart)
{
reader->read (info.buffer, info.startSample,
(int) (newEnd - newStart), newStart, true, true);
}
else
{
const int endSamps = (int) (reader->lengthInSamples - newStart);
reader->read (info.buffer, info.startSample,
endSamps, newStart, true, true);
reader->read (info.buffer, info.startSample + endSamps,
(int) newEnd, 0, true, true);
}
nextPlayPos = newEnd;
}
else
{
const auto samplesToRead = jlimit (int64{},
(int64) info.numSamples,
reader->lengthInSamples - start);
reader->read (info.buffer, info.startSample, (int) samplesToRead, start, true, true);
info.buffer->clear ((int) (info.startSample + samplesToRead),
(int) (info.numSamples - samplesToRead));
nextPlayPos += info.numSamples;
}
}
}
} // namespace juce
juce::AudioBuffer::clear
void clear() noexcept
Definition juce_AudioSampleBuffer.h:556
juce::AudioFormatReaderSource::getNextReadPosition
int64 getNextReadPosition() const override
Definition juce_AudioFormatReaderSource.cpp:44
juce::AudioFormatReaderSource::prepareToPlay
void prepareToPlay(int samplesPerBlockExpected, double sampleRate) override
Definition juce_AudioFormatReaderSource.cpp:50
juce::AudioFormatReaderSource::releaseResources
void releaseResources() override
Definition juce_AudioFormatReaderSource.cpp:51
juce::AudioFormatReaderSource::~AudioFormatReaderSource
~AudioFormatReaderSource() override
Definition juce_AudioFormatReaderSource.cpp:38
juce::AudioFormatReaderSource::AudioFormatReaderSource
AudioFormatReaderSource(AudioFormatReader *sourceReader, bool deleteReaderWhenThisIsDeleted)
Definition juce_AudioFormatReaderSource.cpp:29
juce::AudioFormatReaderSource::setLooping
void setLooping(bool shouldLoop) override
Definition juce_AudioFormatReaderSource.cpp:42
juce::AudioFormatReaderSource::setNextReadPosition
void setNextReadPosition(int64 newPosition) override
Definition juce_AudioFormatReaderSource.cpp:41
juce::AudioFormatReaderSource::getTotalLength
int64 getTotalLength() const override
Definition juce_AudioFormatReaderSource.cpp:40
juce::AudioFormatReaderSource::getNextAudioBlock
void getNextAudioBlock(const AudioSourceChannelInfo &) override
Definition juce_AudioFormatReaderSource.cpp:53
juce::AudioFormatReader
Definition juce_AudioFormatReader.h:44
juce::AudioSourceChannelInfo
Definition juce_AudioSource.h:33
juce::AudioSourceChannelInfo::numSamples
int numSamples
Definition juce_AudioSource.h:81
juce::AudioSourceChannelInfo::buffer
AudioBuffer< float > * buffer
Definition juce_AudioSource.h:73
juce::AudioSourceChannelInfo::startSample
int startSample
Definition juce_AudioSource.h:77