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DSP: added the methods AudioBlock::copyTo/AudioBlock::copyFrom which facilitate copying to/from an AudioBuffer

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hogliux 2018-04-30 14:59:54 +01:00
parent 3b091aa6d3
commit 5faef29f3e
1 changed files with 43 additions and 0 deletions
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43
modules/juce_dsp/containers/juce_AudioBlock.h
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@ -261,6 +261,49 @@ public:
return *this;
}
/** Copy the values from a JUCE's AudioBuffer to the receiver.
All indices and sizes are in the receiver's units, i.e. if SampleType is a
SIMDRegister then incrementing srcPos by one will increase the sample position
in the AudioBuffer's units by a factor of SIMDRegister::<SampleType>::SIMDNumElements.
*/
forcedinline AudioBlock& copyFrom (const AudioBuffer<NumericType>& src, size_t srcPos = 0, size_t dstPos = 0,
size_t numElements = std::numeric_limits<size_t>::max())
{
auto srclen = static_cast<size_t> (src.getNumSamples()) / sizeFactor;
auto n = static_cast<int> (jmin (srclen - srcPos, numSamples - dstPos, numElements) * sizeFactor);
auto maxChannels = jmin (static_cast<size_t> (src.getNumChannels()), static_cast<size_t> (numChannels));
for (size_t ch = 0; ch < maxChannels; ++ch)
FloatVectorOperations::copy (channelPtr (ch),
src.getReadPointer (static_cast<int> (ch),
static_cast<int> (srcPos * sizeFactor)),
n);
return *this;
}
/** Copy the values from the receiver to a JUCE's AudioBuffer.
All indices and sizes are in the receiver's units, i.e. if SampleType is a
SIMDRegister then incrementing dstPos by one will increase the sample position
in the AudioBuffer's units by a factor of SIMDRegister::<SampleType>::SIMDNumElements.
*/
forcedinline const AudioBlock& copyTo (AudioBuffer<NumericType>& dst, size_t srcPos = 0, size_t dstPos = 0,
size_t numElements = std::numeric_limits<size_t>::max()) const
{
auto dstlen = static_cast<size_t> (dst.getNumSamples()) / sizeFactor;
auto n = static_cast<int> (jmin (numSamples - srcPos, dstlen - dstPos, numElements) * sizeFactor);
auto maxChannels = jmin (static_cast<size_t> (dst.getNumChannels()), static_cast<size_t> (numChannels));
for (size_t ch = 0; ch < maxChannels; ++ch)
FloatVectorOperations::copy (dst.getWritePointer (static_cast<int> (ch),
static_cast<int> (dstPos * sizeFactor)),
channelPtr (ch), n);
return *this;
}
/** Move memory within the receiver from the position srcPos to the position dstPos.
If numElements is not specified then move will move the maximum amount of memory.
*/