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AudioBuffer: Avoid unnecessary allocations when reassigning referenced channels

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reuk 2025-09-04 14:22:18 +01:00
parent 848082095f
commit bc3c171c9d
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1 changed files with 25 additions and 8 deletions
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21
modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.h
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@ -487,6 +487,23 @@ public:
jassert (dataToReferTo != nullptr); jassert (dataToReferTo != nullptr);
jassert (newNumChannels >= 0 && newNumSamples >= 0); jassert (newNumChannels >= 0 && newNumSamples >= 0);
size = newNumSamples;
if (newNumChannels <= numChannels)
{
numChannels = newNumChannels;
std::transform (dataToReferTo, dataToReferTo + numChannels, channels, [&] (auto* src)
{
jassert (src != nullptr);
return src + newStartSample;
});
channels[numChannels] = nullptr;
isClear = false;
}
else
{
if (allocatedBytes != 0) if (allocatedBytes != 0)
{ {
allocatedBytes = 0; allocatedBytes = 0;
@ -494,9 +511,9 @@ public:
} }
numChannels = newNumChannels; numChannels = newNumChannels;
size = newNumSamples;
allocateChannels (dataToReferTo, newStartSample); allocateChannels (dataToReferTo, newStartSample);
}
jassert (! isClear); jassert (! isClear);
} }