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Dataset card Data Studio Files Community
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2.2M
: MemoryMappedAudioFormatReader (f, reader, reader.dataChunkStart,
reader.bytesPerFrame * reader.lengthInSamples, reader.bytesPerFrame),
littleEndian (reader.littleEndian)
{
}
bool readSamples (int** destSamples, int numDestChannels, int startOffsetInDestBuffer,
int64 startSampleInFile, int numSamples) override
{
clearSamplesBeyondAvailableLength (destSamples, numDestChannels, startOffsetInDestBuffer,
startSampleInFile, numSamples, lengthInSamples);
if (map == nullptr || ! mappedSection.contains (Range<int64> (startSampleInFile, startSampleInFile + numSamples)))
{
jassertfalse; // you must make sure that the window contains all the samples you're going to attempt to read.
return false;
}
if (littleEndian)
AiffAudioFormatReader::copySampleData<AudioData::LittleEndian>
(bitsPerSample, usesFloatingPointData, destSamples, startOffsetInDestBuffer,
numDestChannels, sampleToPointer (startSampleInFile), (int) numChannels, numSamples);
else
AiffAudioFormatReader::copySampleData<AudioData::BigEndian>
(bitsPerSample, usesFloatingPointData, destSamples, startOffsetInDestBuffer,
numDestChannels, sampleToPointer (startSampleInFile), (int) numChannels, numSamples);
return true;
}
void getSample (int64 sample, float* result) const noexcept override
{
auto num = (int) numChannels;
if (map == nullptr || ! mappedSection.contains (sample))
{
jassertfalse; // you must make sure that the window contains all the samples you're going to attempt to read.
zeromem (result, (size_t) num * sizeof (float));
return;
}
float** dest = &result;
const void* source = sampleToPointer (sample);
if (littleEndian)
{
switch (bitsPerSample)
{
case 8: ReadHelper<AudioData::Float32, AudioData::UInt8, AudioData::LittleEndian>::read (dest, 0, 1, source, 1, num); break;
case 16: ReadHelper<AudioData::Float32, AudioData::Int16, AudioData::LittleEndian>::read (dest, 0, 1, source, 1, num); break;
case 24: ReadHelper<AudioData::Float32, AudioData::Int24, AudioData::LittleEndian>::read (dest, 0, 1, source, 1, num); break;
case 32: if (usesFloatingPointData) ReadHelper<AudioData::Float32, AudioData::Float32, AudioData::LittleEndian>::read (dest, 0, 1, source, 1, num);
else ReadHelper<AudioData::Float32, AudioData::Int32, AudioData::LittleEndian>::read (dest, 0, 1, source, 1, num);
break;
default: jassertfalse; break;
}
}
else
{
switch (bitsPerSample)
{
case 8: ReadHelper<AudioData::Float32, AudioData::UInt8, AudioData::BigEndian>::read (dest, 0, 1, source, 1, num); break;
case 16: ReadHelper<AudioData::Float32, AudioData::Int16, AudioData::BigEndian>::read (dest, 0, 1, source, 1, num); break;
case 24: ReadHelper<AudioData::Float32, AudioData::Int24, AudioData::BigEndian>::read (dest, 0, 1, source, 1, num); break;
case 32: if (usesFloatingPointData) ReadHelper<AudioData::Float32, AudioData::Float32, AudioData::BigEndian>::read (dest, 0, 1, source, 1, num);
else ReadHelper<AudioData::Float32, AudioData::Int32, AudioData::BigEndian>::read (dest, 0, 1, source, 1, num);
break;
default: jassertfalse; break;
}
}
}
void readMaxLevels (int64 startSampleInFile, int64 numSamples, Range<float>* results, int numChannelsToRead) override
{
numSamples = jmin (numSamples, lengthInSamples - startSampleInFile);
if (map == nullptr || numSamples <= 0 || ! mappedSection.contains (Range<int64> (startSampleInFile, startSampleInFile + numSamples)))
{
jassert (numSamples <= 0); // you must make sure that the window contains all the samples you're going to attempt to read.
for (int i = 0; i < numChannelsToRead; ++i)
results[i] = Range<float>();
return;
}
switch (bitsPerSample)
{
case 8: scanMinAndMax<AudioData::UInt8> (startSampleInFile, numSamples, results, numChannelsToRead); break;
case 16: scanMinAndMax<AudioData::Int16> (startSampleInFile, numSamples, results, numChannelsToRead); break;
case 24: scanMinAndMax<AudioData::Int24> (startSampleInFile, numSamples, results, numChannelsToRead); break;
case 32: if (usesFloatingPointData) scanMinAndMax<AudioData::Float32> (startSampleInFile, numSamples, results, numChannelsToRead);
else scanMinAndMax<AudioData::Int32> (startSampleInFile, numSamples, results, numChannelsToRead);
break;
default: jassertfalse; break;
}
}
using AudioFormatReader::readMaxLevels;