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juce_AudioDataConverters.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.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
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
{
JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wdeprecated-declarations")
JUCE_BEGIN_IGNORE_WARNINGS_MSVC (4996)
void AudioDataConverters::convertFloatToInt16LE (const float* source, void* dest, int numSamples, int destBytesPerSample)
{
auto maxVal = (double) 0x7fff;
auto intData = static_cast<char*> (dest);
if (dest != (void*) source || destBytesPerSample <= 4)
{
for (int i = 0; i < numSamples; ++i)
{
*unalignedPointerCast<uint16*> (intData) = ByteOrder::swapIfBigEndian ((uint16) (short) roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])));
intData += destBytesPerSample;
}
}
else
{
intData += destBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= destBytesPerSample;
*unalignedPointerCast<uint16*> (intData) = ByteOrder::swapIfBigEndian ((uint16) (short) roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])));
}
}
}
void AudioDataConverters::convertFloatToInt16BE (const float* source, void* dest, int numSamples, int destBytesPerSample)
{
auto maxVal = (double) 0x7fff;
auto intData = static_cast<char*> (dest);
if (dest != (void*) source || destBytesPerSample <= 4)
{
for (int i = 0; i < numSamples; ++i)
{
*unalignedPointerCast<uint16*> (intData) = ByteOrder::swapIfLittleEndian ((uint16) (short) roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])));
intData += destBytesPerSample;
}
}
else
{
intData += destBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= destBytesPerSample;
*unalignedPointerCast<uint16*> (intData) = ByteOrder::swapIfLittleEndian ((uint16) (short) roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])));
}
}
}
void AudioDataConverters::convertFloatToInt24LE (const float* source, void* dest, int numSamples, int destBytesPerSample)
{
auto maxVal = (double) 0x7fffff;
auto intData = static_cast<char*> (dest);
if (dest != (void*) source || destBytesPerSample <= 4)
{
for (int i = 0; i < numSamples; ++i)
{
ByteOrder::littleEndian24BitToChars (roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])), intData);
intData += destBytesPerSample;
}
}
else
{
intData += destBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= destBytesPerSample;
ByteOrder::littleEndian24BitToChars (roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])), intData);
}
}
}
void AudioDataConverters::convertFloatToInt24BE (const float* source, void* dest, int numSamples, int destBytesPerSample)
{
auto maxVal = (double) 0x7fffff;
auto intData = static_cast<char*> (dest);
if (dest != (void*) source || destBytesPerSample <= 4)
{
for (int i = 0; i < numSamples; ++i)
{
ByteOrder::bigEndian24BitToChars (roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])), intData);
intData += destBytesPerSample;
}
}
else
{
intData += destBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= destBytesPerSample;
ByteOrder::bigEndian24BitToChars (roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])), intData);
}
}
}
void AudioDataConverters::convertFloatToInt32LE (const float* source, void* dest, int numSamples, int destBytesPerSample)
{
auto maxVal = (double) 0x7fffffff;
auto intData = static_cast<char*> (dest);
if (dest != (void*) source || destBytesPerSample <= 4)
{
for (int i = 0; i < numSamples; ++i)
{
*unalignedPointerCast<uint32*> (intData) = ByteOrder::swapIfBigEndian ((uint32) roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])));
intData += destBytesPerSample;
}
}
else
{
intData += destBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= destBytesPerSample;
*unalignedPointerCast<uint32*> (intData) = ByteOrder::swapIfBigEndian ((uint32) roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])));
}
}
}
void AudioDataConverters::convertFloatToInt32BE (const float* source, void* dest, int numSamples, int destBytesPerSample)
{
auto maxVal = (double) 0x7fffffff;
auto intData = static_cast<char*> (dest);
if (dest != (void*) source || destBytesPerSample <= 4)
{
for (int i = 0; i < numSamples; ++i)
{
*unalignedPointerCast<uint32*> (intData) = ByteOrder::swapIfLittleEndian ((uint32) roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])));
intData += destBytesPerSample;
}
}
else
{
intData += destBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= destBytesPerSample;
*unalignedPointerCast<uint32*> (intData) = ByteOrder::swapIfLittleEndian ((uint32) roundToInt (jlimit (-maxVal, maxVal, maxVal * source[i])));
}
}
}
void AudioDataConverters::convertFloatToFloat32LE (const float* source, void* dest, int numSamples, int destBytesPerSample)
{
jassert (dest != (void*) source || destBytesPerSample <= 4); // This op can't be performed on in-place data!
char* d = static_cast<char*> (dest);
for (int i = 0; i < numSamples; ++i)
{
*unalignedPointerCast<float*> (d) = source[i];
#if JUCE_BIG_ENDIAN
*unalignedPointerCast<uint32*> (d) = ByteOrder::swap (*unalignedPointerCast<uint32*> (d));
#endif
d += destBytesPerSample;
}
}
void AudioDataConverters::convertFloatToFloat32BE (const float* source, void* dest, int numSamples, int destBytesPerSample)
{
jassert (dest != (void*) source || destBytesPerSample <= 4); // This op can't be performed on in-place data!
auto d = static_cast<char*> (dest);
for (int i = 0; i < numSamples; ++i)
{
*unalignedPointerCast<float*> (d) = source[i];
#if JUCE_LITTLE_ENDIAN
*unalignedPointerCast<uint32*> (d) = ByteOrder::swap (*unalignedPointerCast<uint32*> (d));
#endif
d += destBytesPerSample;
}
}
//==============================================================================
void AudioDataConverters::convertInt16LEToFloat (const void* source, float* dest, int numSamples, int srcBytesPerSample)
{
const float scale = 1.0f / 0x7fff;
auto intData = static_cast<const char*> (source);
if (source != (void*) dest || srcBytesPerSample >= 4)
{
for (int i = 0; i < numSamples; ++i)
{
dest[i] = scale * (short) ByteOrder::swapIfBigEndian (*unalignedPointerCast<const uint16*> (intData));
intData += srcBytesPerSample;
}
}
else
{
intData += srcBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= srcBytesPerSample;
dest[i] = scale * (short) ByteOrder::swapIfBigEndian (*unalignedPointerCast<const uint16*> (intData));
}
}
}
void AudioDataConverters::convertInt16BEToFloat (const void* source, float* dest, int numSamples, int srcBytesPerSample)
{
const float scale = 1.0f / 0x7fff;
auto intData = static_cast<const char*> (source);
if (source != (void*) dest || srcBytesPerSample >= 4)
{
for (int i = 0; i < numSamples; ++i)
{
dest[i] = scale * (short) ByteOrder::swapIfLittleEndian (*unalignedPointerCast<const uint16*> (intData));
intData += srcBytesPerSample;
}
}
else
{
intData += srcBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= srcBytesPerSample;
dest[i] = scale * (short) ByteOrder::swapIfLittleEndian (*unalignedPointerCast<const uint16*> (intData));
}
}
}
void AudioDataConverters::convertInt24LEToFloat (const void* source, float* dest, int numSamples, int srcBytesPerSample)
{
const float scale = 1.0f / 0x7fffff;
auto intData = static_cast<const char*> (source);
if (source != (void*) dest || srcBytesPerSample >= 4)
{
for (int i = 0; i < numSamples; ++i)
{
dest[i] = scale * (short) ByteOrder::littleEndian24Bit (intData);
intData += srcBytesPerSample;
}
}
else
{
intData += srcBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= srcBytesPerSample;
dest[i] = scale * (short) ByteOrder::littleEndian24Bit (intData);
}
}
}
void AudioDataConverters::convertInt24BEToFloat (const void* source, float* dest, int numSamples, int srcBytesPerSample)
{
const float scale = 1.0f / 0x7fffff;
auto intData = static_cast<const char*> (source);
if (source != (void*) dest || srcBytesPerSample >= 4)
{
for (int i = 0; i < numSamples; ++i)
{
dest[i] = scale * (short) ByteOrder::bigEndian24Bit (intData);
intData += srcBytesPerSample;
}
}
else
{
intData += srcBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= srcBytesPerSample;
dest[i] = scale * (short) ByteOrder::bigEndian24Bit (intData);
}
}
}
void AudioDataConverters::convertInt32LEToFloat (const void* source, float* dest, int numSamples, int srcBytesPerSample)
{
const float scale = 1.0f / (float) 0x7fffffff;
auto intData = static_cast<const char*> (source);
if (source != (void*) dest || srcBytesPerSample >= 4)
{
for (int i = 0; i < numSamples; ++i)
{
dest[i] = scale * (float) ByteOrder::swapIfBigEndian (*unalignedPointerCast<const uint32*> (intData));
intData += srcBytesPerSample;
}
}
else
{
intData += srcBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= srcBytesPerSample;
dest[i] = scale * (float) ByteOrder::swapIfBigEndian (*unalignedPointerCast<const uint32*> (intData));
}
}
}
void AudioDataConverters::convertInt32BEToFloat (const void* source, float* dest, int numSamples, int srcBytesPerSample)
{
const float scale = 1.0f / (float) 0x7fffffff;
auto intData = static_cast<const char*> (source);
if (source != (void*) dest || srcBytesPerSample >= 4)
{
for (int i = 0; i < numSamples; ++i)
{
dest[i] = scale * (float) ByteOrder::swapIfLittleEndian (*unalignedPointerCast<const uint32*> (intData));
intData += srcBytesPerSample;
}
}
else
{
intData += srcBytesPerSample * numSamples;
for (int i = numSamples; --i >= 0;)
{
intData -= srcBytesPerSample;
dest[i] = scale * (float) ByteOrder::swapIfLittleEndian (*unalignedPointerCast<const uint32*> (intData));
}
}
}
void AudioDataConverters::convertFloat32LEToFloat (const void* source, float* dest, int numSamples, int srcBytesPerSample)
{
auto s = static_cast<const char*> (source);
for (int i = 0; i < numSamples; ++i)
{
dest[i] = *unalignedPointerCast<const float*> (s);
#if JUCE_BIG_ENDIAN
auto d = unalignedPointerCast<uint32*> (dest + i);
*d = ByteOrder::swap (*d);
#endif
s += srcBytesPerSample;
}
}
void AudioDataConverters::convertFloat32BEToFloat (const void* source, float* dest, int numSamples, int srcBytesPerSample)
{
auto s = static_cast<const char*> (source);
for (int i = 0; i < numSamples; ++i)
{
dest[i] = *unalignedPointerCast<const float*> (s);
#if JUCE_LITTLE_ENDIAN
auto d = unalignedPointerCast<uint32*> (dest + i);
*d = ByteOrder::swap (*d);
#endif
s += srcBytesPerSample;
}
}
//==============================================================================
void AudioDataConverters::convertFloatToFormat (DataFormat destFormat, const float* source, void* dest, int numSamples)
{
switch (destFormat)
{
case int16LE: convertFloatToInt16LE (source, dest, numSamples); break;
case int16BE: convertFloatToInt16BE (source, dest, numSamples); break;
case int24LE: convertFloatToInt24LE (source, dest, numSamples); break;
case int24BE: convertFloatToInt24BE (source, dest, numSamples); break;
case int32LE: convertFloatToInt32LE (source, dest, numSamples); break;
case int32BE: convertFloatToInt32BE (source, dest, numSamples); break;
case float32LE: convertFloatToFloat32LE (source, dest, numSamples); break;
case float32BE: convertFloatToFloat32BE (source, dest, numSamples); break;
default: jassertfalse; break;
}
}
void AudioDataConverters::convertFormatToFloat (DataFormat sourceFormat, const void* source, float* dest, int numSamples)
{
switch (sourceFormat)
{
case int16LE: convertInt16LEToFloat (source, dest, numSamples); break;
case int16BE: convertInt16BEToFloat (source, dest, numSamples); break;
case int24LE: convertInt24LEToFloat (source, dest, numSamples); break;
case int24BE: convertInt24BEToFloat (source, dest, numSamples); break;
case int32LE: convertInt32LEToFloat (source, dest, numSamples); break;
case int32BE: convertInt32BEToFloat (source, dest, numSamples); break;
case float32LE: convertFloat32LEToFloat (source, dest, numSamples); break;
case float32BE: convertFloat32BEToFloat (source, dest, numSamples); break;
default: jassertfalse; break;
}
}
//==============================================================================
void AudioDataConverters::interleaveSamples (const float** source, float* dest, int numSamples, int numChannels)
{
using Format = AudioData::Format<AudioData::Float32, AudioData::NativeEndian>;
AudioData::interleaveSamples (AudioData::NonInterleavedSource<Format> { source, numChannels },
AudioData::InterleavedDest<Format> { dest, numChannels },
numSamples);
}
void AudioDataConverters::deinterleaveSamples (const float* source, float** dest, int numSamples, int numChannels)
{
using Format = AudioData::Format<AudioData::Float32, AudioData::NativeEndian>;
AudioData::deinterleaveSamples (AudioData::InterleavedSource<Format> { source, numChannels },
AudioData::NonInterleavedDest<Format> { dest, numChannels },
numSamples);
}
//==============================================================================
//==============================================================================
#if JUCE_UNIT_TESTS
class AudioConversionTests final : public UnitTest
{
public:
AudioConversionTests()
: UnitTest ("Audio data conversion", UnitTestCategories::audio)
{}
template <class F1, class E1, class F2, class E2>
struct Test5
{
static void test (UnitTest& unitTest, Random& r)
{
test (unitTest, false, r);
test (unitTest, true, r);
}
JUCE_BEGIN_IGNORE_WARNINGS_MSVC (6262)
static void test (UnitTest& unitTest, bool inPlace, Random& r)
{
const int numSamples = 2048;
int32 original [(size_t) numSamples],
converted[(size_t) numSamples],
reversed [(size_t) numSamples];
{
AudioData::Pointer<F1, E1, AudioData::NonInterleaved, AudioData::NonConst> d (original);
bool clippingFailed = false;
for (int i = 0; i < numSamples / 2; ++i)
{
d.setAsFloat (r.nextFloat() * 2.2f - 1.1f);
if (! d.isFloatingPoint())
clippingFailed = d.getAsFloat() > 1.0f || d.getAsFloat() < -1.0f || clippingFailed;
++d;
d.setAsInt32 (r.nextInt());
++d;
}
unitTest.expect (! clippingFailed);
}
// convert data from the source to dest format..
std::unique_ptr<AudioData::Converter> conv (new AudioData::ConverterInstance<AudioData::Pointer<F1, E1, AudioData::NonInterleaved, AudioData::Const>,
AudioData::Pointer<F2, E2, AudioData::NonInterleaved, AudioData::NonConst>>());
conv->convertSamples (inPlace ? reversed : converted, original, numSamples);
// ..and back again..
conv.reset (new AudioData::ConverterInstance<AudioData::Pointer<F2, E2, AudioData::NonInterleaved, AudioData::Const>,
AudioData::Pointer<F1, E1, AudioData::NonInterleaved, AudioData::NonConst>>());
if (! inPlace)
zeromem (reversed, sizeof (reversed));
conv->convertSamples (reversed, inPlace ? reversed : converted, numSamples);
{
int biggestDiff = 0;
AudioData::Pointer<F1, E1, AudioData::NonInterleaved, AudioData::Const> d1 (original);
AudioData::Pointer<F1, E1, AudioData::NonInterleaved, AudioData::Const> d2 (reversed);
const int errorMargin = 2 * AudioData::Pointer<F1, E1, AudioData::NonInterleaved, AudioData::Const>::get32BitResolution()
+ AudioData::Pointer<F2, E2, AudioData::NonInterleaved, AudioData::Const>::get32BitResolution();
for (int i = 0; i < numSamples; ++i)
{
biggestDiff = jmax (biggestDiff, std::abs (d1.getAsInt32() - d2.getAsInt32()));
++d1;
++d2;
}
unitTest.expect (biggestDiff <= errorMargin);
}
}
JUCE_END_IGNORE_WARNINGS_MSVC
};
template <class F1, class E1, class FormatType>
struct Test3
{
static void test (UnitTest& unitTest, Random& r)
{
Test5 <F1, E1, FormatType, AudioData::BigEndian>::test (unitTest, r);
Test5 <F1, E1, FormatType, AudioData::LittleEndian>::test (unitTest, r);
}
};
template <class FormatType, class Endianness>
struct Test2
{
static void test (UnitTest& unitTest, Random& r)
{
Test3 <FormatType, Endianness, AudioData::Int8>::test (unitTest, r);
Test3 <FormatType, Endianness, AudioData::UInt8>::test (unitTest, r);
Test3 <FormatType, Endianness, AudioData::Int16>::test (unitTest, r);
Test3 <FormatType, Endianness, AudioData::Int24>::test (unitTest, r);
Test3 <FormatType, Endianness, AudioData::Int32>::test (unitTest, r);
Test3 <FormatType, Endianness, AudioData::Float32>::test (unitTest, r);
}
};
template <class FormatType>
struct Test1
{
static void test (UnitTest& unitTest, Random& r)
{
Test2 <FormatType, AudioData::BigEndian>::test (unitTest, r);
Test2 <FormatType, AudioData::LittleEndian>::test (unitTest, r);
}
};
void runTest() override
{
auto r = getRandom();
beginTest ("Round-trip conversion: Int8");
Test1 <AudioData::Int8>::test (*this, r);
beginTest ("Round-trip conversion: Int16");
Test1 <AudioData::Int16>::test (*this, r);
beginTest ("Round-trip conversion: Int24");
Test1 <AudioData::Int24>::test (*this, r);
beginTest ("Round-trip conversion: Int32");
Test1 <AudioData::Int32>::test (*this, r);
beginTest ("Round-trip conversion: Float32");
Test1 <AudioData::Float32>::test (*this, r);
using Format = AudioData::Format<AudioData::Float32, AudioData::NativeEndian>;
beginTest ("Interleaving");
{
constexpr auto numChannels = 4;
constexpr auto numSamples = 512;
AudioBuffer<float> sourceBuffer { numChannels, numSamples },
destBuffer { 1, numChannels * numSamples };
for (int ch = 0; ch < numChannels; ++ch)
for (int i = 0; i < numSamples; ++i)
sourceBuffer.setSample (ch, i, r.nextFloat());
AudioData::interleaveSamples (AudioData::NonInterleavedSource<Format> { sourceBuffer.getArrayOfReadPointers(), numChannels },
AudioData::InterleavedDest<Format> { destBuffer.getWritePointer (0), numChannels },
numSamples);
for (int ch = 0; ch < numChannels; ++ch)
for (int i = 0; i < numSamples; ++i)
expectEquals (destBuffer.getSample (0, ch + (i * numChannels)), sourceBuffer.getSample (ch, i));
}
beginTest ("Deinterleaving");
{
constexpr auto numChannels = 4;
constexpr auto numSamples = 512;
AudioBuffer<float> sourceBuffer { 1, numChannels * numSamples },
destBuffer { numChannels, numSamples };
for (int ch = 0; ch < numChannels; ++ch)
for (int i = 0; i < numSamples; ++i)
sourceBuffer.setSample (0, ch + (i * numChannels), r.nextFloat());
AudioData::deinterleaveSamples (AudioData::InterleavedSource<Format> { sourceBuffer.getReadPointer (0), numChannels },
AudioData::NonInterleavedDest<Format> { destBuffer.getArrayOfWritePointers(), numChannels },
numSamples);
for (int ch = 0; ch < numChannels; ++ch)
for (int i = 0; i < numSamples; ++i)
expectEquals (sourceBuffer.getSample (0, ch + (i * numChannels)), destBuffer.getSample (ch, i));
}
}
};
static AudioConversionTests audioConversionUnitTests;
#endif
JUCE_END_IGNORE_WARNINGS_MSVC
JUCE_END_IGNORE_WARNINGS_GCC_LIKE
} // namespace juce
juce::AudioDataConverters
Definition juce_AudioDataConverters.h:801
juce::AudioData::interleaveSamples
static void interleaveSamples(NonInterleavedSource< SourceFormat... > source, InterleavedDest< DestFormat... > dest, int numSamples)
Definition juce_AudioDataConverters.h:723
juce::AudioData::InterleavedSource
ChannelData< true, true, Format... > InterleavedSource
Definition juce_AudioDataConverters.h:697
juce::AudioData::InterleavedDest
ChannelData< true, false, Format... > InterleavedDest
Definition juce_AudioDataConverters.h:699
juce::AudioData::NonInterleavedSource
ChannelData< false, true, Format... > NonInterleavedSource
Definition juce_AudioDataConverters.h:701
juce::AudioData::NonInterleavedDest
ChannelData< false, false, Format... > NonInterleavedDest
Definition juce_AudioDataConverters.h:703
juce::AudioData::deinterleaveSamples
static void deinterleaveSamples(InterleavedSource< SourceFormat... > source, NonInterleavedDest< DestFormat... > dest, int numSamples)
Definition juce_AudioDataConverters.h:767
juce::ByteOrder::swapIfLittleEndian
static Type swapIfLittleEndian(Type value) noexcept
Definition juce_ByteOrder.h:74
juce::ByteOrder::littleEndian24BitToChars
static void littleEndian24BitToChars(int32 value, void *destBytes) noexcept
Definition juce_ByteOrder.h:217
juce::ByteOrder::swap
static constexpr uint16 swap(uint16 value) noexcept
Definition juce_ByteOrder.h:143
juce::ByteOrder::bigEndian24BitToChars
static void bigEndian24BitToChars(int32 value, void *destBytes) noexcept
Definition juce_ByteOrder.h:218
juce::ByteOrder::littleEndian24Bit
static constexpr int littleEndian24Bit(const void *bytes) noexcept
Definition juce_ByteOrder.h:214
juce::ByteOrder::swapIfBigEndian
static Type swapIfBigEndian(Type value) noexcept
Definition juce_ByteOrder.h:63
juce::ByteOrder::bigEndian24Bit
static constexpr int bigEndian24Bit(const void *bytes) noexcept
Definition juce_ByteOrder.h:215
juce::UnitTest
Definition juce_UnitTest.h:70