/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2017 - ROLI Ltd.
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 5 End-User License
Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
27th April 2017).
End User License Agreement: www.juce.com/juce-5-licence
Privacy Policy: www.juce.com/juce-5-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
{
static const char* const aiffFormatName = "AIFF file";
//==============================================================================
const char* const AiffAudioFormat::appleOneShot = "apple one shot";
const char* const AiffAudioFormat::appleRootSet = "apple root set";
const char* const AiffAudioFormat::appleRootNote = "apple root note";
const char* const AiffAudioFormat::appleBeats = "apple beats";
const char* const AiffAudioFormat::appleDenominator = "apple denominator";
const char* const AiffAudioFormat::appleNumerator = "apple numerator";
const char* const AiffAudioFormat::appleTag = "apple tag";
const char* const AiffAudioFormat::appleKey = "apple key";
//==============================================================================
namespace AiffFileHelpers
{
inline int chunkName (const char* name) noexcept { return (int) ByteOrder::littleEndianInt (name); }
#if JUCE_MSVC
#pragma pack (push, 1)
#endif
//==============================================================================
struct InstChunk
{
struct Loop
{
uint16 type; // these are different in AIFF and WAV
uint16 startIdentifier;
uint16 endIdentifier;
} JUCE_PACKED;
int8 baseNote;
int8 detune;
int8 lowNote;
int8 highNote;
int8 lowVelocity;
int8 highVelocity;
int16 gain;
Loop sustainLoop;
Loop releaseLoop;
void copyTo (StringPairArray& values) const
{
values.set ("MidiUnityNote", String (baseNote));
values.set ("Detune", String (detune));
values.set ("LowNote", String (lowNote));
values.set ("HighNote", String (highNote));
values.set ("LowVelocity", String (lowVelocity));
values.set ("HighVelocity", String (highVelocity));
values.set ("Gain", String ((int16) ByteOrder::swapIfLittleEndian ((uint16) gain)));
values.set ("NumSampleLoops", String (2)); // always 2 with AIFF, WAV can have more
values.set ("Loop0Type", String (ByteOrder::swapIfLittleEndian (sustainLoop.type)));
values.set ("Loop0StartIdentifier", String (ByteOrder::swapIfLittleEndian (sustainLoop.startIdentifier)));
values.set ("Loop0EndIdentifier", String (ByteOrder::swapIfLittleEndian (sustainLoop.endIdentifier)));
values.set ("Loop1Type", String (ByteOrder::swapIfLittleEndian (releaseLoop.type)));
values.set ("Loop1StartIdentifier", String (ByteOrder::swapIfLittleEndian (releaseLoop.startIdentifier)));
values.set ("Loop1EndIdentifier", String (ByteOrder::swapIfLittleEndian (releaseLoop.endIdentifier)));
}
static uint16 getValue16 (const StringPairArray& values, const char* name, const char* def)
{
return ByteOrder::swapIfLittleEndian ((uint16) values.getValue (name, def).getIntValue());
}
static int8 getValue8 (const StringPairArray& values, const char* name, const char* def)
{
return (int8) values.getValue (name, def).getIntValue();
}
static void create (MemoryBlock& block, const StringPairArray& values)
{
if (values.getAllKeys().contains ("MidiUnityNote", true))
{
block.setSize ((sizeof (InstChunk) + 3) & ~(size_t) 3, true);
auto& inst = *static_cast<InstChunk*> (block.getData());
inst.baseNote = getValue8 (values, "MidiUnityNote", "60");
inst.detune = getValue8 (values, "Detune", "0");
inst.lowNote = getValue8 (values, "LowNote", "0");
inst.highNote = getValue8 (values, "HighNote", "127");
inst.lowVelocity = getValue8 (values, "LowVelocity", "1");
inst.highVelocity = getValue8 (values, "HighVelocity", "127");
inst.gain = (int16) getValue16 (values, "Gain", "0");
inst.sustainLoop.type = getValue16 (values, "Loop0Type", "0");
inst.sustainLoop.startIdentifier = getValue16 (values, "Loop0StartIdentifier", "0");
inst.sustainLoop.endIdentifier = getValue16 (values, "Loop0EndIdentifier", "0");
inst.releaseLoop.type = getValue16 (values, "Loop1Type", "0");
inst.releaseLoop.startIdentifier = getValue16 (values, "Loop1StartIdentifier", "0");
inst.releaseLoop.endIdentifier = getValue16 (values, "Loop1EndIdentifier", "0");
}
}
} JUCE_PACKED;
//==============================================================================
struct BASCChunk
{
enum Key
{
minor = 1,
major = 2,
neither = 3,
both = 4
};
BASCChunk (InputStream& input)
{
zerostruct (*this);
flags = (uint32) input.readIntBigEndian();
numBeats = (uint32) input.readIntBigEndian();
rootNote = (uint16) input.readShortBigEndian();
key = (uint16) input.readShortBigEndian();
timeSigNum = (uint16) input.readShortBigEndian();
timeSigDen = (uint16) input.readShortBigEndian();
oneShot = (uint16) input.readShortBigEndian();
input.read (unknown, sizeof (unknown));
}
void addToMetadata (StringPairArray& metadata) const
{
const bool rootNoteSet = rootNote != 0;
setBoolFlag (metadata, AiffAudioFormat::appleOneShot, oneShot == 2);
setBoolFlag (metadata, AiffAudioFormat::appleRootSet, rootNoteSet);
if (rootNoteSet)
metadata.set (AiffAudioFormat::appleRootNote, String (rootNote));
metadata.set (AiffAudioFormat::appleBeats, String (numBeats));
metadata.set (AiffAudioFormat::appleDenominator, String (timeSigDen));
metadata.set (AiffAudioFormat::appleNumerator, String (timeSigNum));
const char* keyString = nullptr;
switch (key)
{
case minor: keyString = "minor"; break;
case major: keyString = "major"; break;
case neither: keyString = "neither"; break;
case both: keyString = "both"; break;
}
if (keyString != nullptr)
metadata.set (AiffAudioFormat::appleKey, keyString);
}
void setBoolFlag (StringPairArray& values, const char* name, bool shouldBeSet) const
{
values.set (name, shouldBeSet ? "1" : "0");
}
uint32 flags;
uint32 numBeats;
uint16 rootNote;
uint16 key;
uint16 timeSigNum;
uint16 timeSigDen;
uint16 oneShot;
uint8 unknown[66];
} JUCE_PACKED;
#if JUCE_MSVC
#pragma pack (pop)
#endif
//==============================================================================
namespace CATEChunk
{
static bool isValidTag (const char* d) noexcept
{
return CharacterFunctions::isLetterOrDigit (d[0]) && CharacterFunctions::isUpperCase (static_cast<juce_wchar> (d[0]))
&& CharacterFunctions::isLetterOrDigit (d[1]) && CharacterFunctions::isLowerCase (static_cast<juce_wchar> (d[1]))
&& CharacterFunctions::isLetterOrDigit (d[2]) && CharacterFunctions::isLowerCase (static_cast<juce_wchar> (d[2]));
}
static bool isAppleGenre (const String& tag) noexcept
{
static const char* appleGenres[] =
{
"Rock/Blues",
"Electronic/Dance",
"Jazz",
"Urban",
"World/Ethnic",
"Cinematic/New Age",
"Orchestral",
"Country/Folk",
"Experimental",
"Other Genre"
};
for (int i = 0; i < numElementsInArray (appleGenres); ++i)
if (tag == appleGenres[i])
return true;
return false;
}
static String read (InputStream& input, const uint32 length)
{
MemoryBlock mb;
input.skipNextBytes (4);
input.readIntoMemoryBlock (mb, (ssize_t) length - 4);
StringArray tagsArray;
auto* data = static_cast<const char*> (mb.getData());
auto* dataEnd = data + mb.getSize();
while (data < dataEnd)
{
bool isGenre = false;
if (isValidTag (data))
{
auto tag = String (CharPointer_UTF8 (data), CharPointer_UTF8 (dataEnd));
isGenre = isAppleGenre (tag);
tagsArray.add (tag);
}
data += isGenre ? 118 : 50;
if (data < dataEnd && data[0] == 0)
{
if (data + 52 < dataEnd && isValidTag (data + 50)) data += 50;
else if (data + 120 < dataEnd && isValidTag (data + 118)) data += 118;
else if (data + 170 < dataEnd && isValidTag (data + 168)) data += 168;
}
}
return tagsArray.joinIntoString (";");
}
}
//==============================================================================
namespace MarkChunk
{
static bool metaDataContainsZeroIdentifiers (const StringPairArray& values)
{
// (zero cue identifiers are valid for WAV but not for AIFF)
const String cueString ("Cue");
const String noteString ("CueNote");
const String identifierString ("Identifier");
for (auto& key : values.getAllKeys())
{
if (key.startsWith (noteString))
continue; // zero identifier IS valid in a COMT chunk
if (key.startsWith (cueString) && key.contains (identifierString))
if (values.getValue (key, "-1").getIntValue() == 0)
return true;
}
return false;
}
static void create (MemoryBlock& block, const StringPairArray& values)
{
auto numCues = values.getValue ("NumCuePoints", "0").getIntValue();
if (numCues > 0)
{
MemoryOutputStream out (block, false);
out.writeShortBigEndian ((short) numCues);
auto numCueLabels = values.getValue ("NumCueLabels", "0").getIntValue();
auto idOffset = metaDataContainsZeroIdentifiers (values) ? 1 : 0; // can't have zero IDs in AIFF
#if JUCE_DEBUG
Array<int> identifiers;
#endif
for (int i = 0; i < numCues; ++i)
{
auto prefixCue = "Cue" + String (i);
auto identifier = idOffset + values.getValue (prefixCue + "Identifier", "1").getIntValue();
#if JUCE_DEBUG
jassert (! identifiers.contains (identifier));
identifiers.add (identifier);
#endif
auto offset = values.getValue (prefixCue + "Offset", "0").getIntValue();
auto label = "CueLabel" + String (i);
for (int labelIndex = 0; labelIndex < numCueLabels; ++labelIndex)
{
auto prefixLabel = "CueLabel" + String (labelIndex);
auto labelIdentifier = idOffset + values.getValue (prefixLabel + "Identifier", "1").getIntValue();
if (labelIdentifier == identifier)
{
label = values.getValue (prefixLabel + "Text", label);
break;
}
}
out.writeShortBigEndian ((short) identifier);
out.writeIntBigEndian (offset);
auto labelLength = jmin ((size_t) 254, label.getNumBytesAsUTF8()); // seems to need null terminator even though it's a pstring
out.writeByte ((char) labelLength + 1);
out.write (label.toUTF8(), labelLength);
out.writeByte (0);
if ((out.getDataSize() & 1) != 0)
out.writeByte (0);
}
}
}
}
//==============================================================================
namespace COMTChunk
{
static void create (MemoryBlock& block, const StringPairArray& values)
{
auto numNotes = values.getValue ("NumCueNotes", "0").getIntValue();
if (numNotes > 0)
{
MemoryOutputStream out (block, false);
out.writeShortBigEndian ((short) numNotes);
for (int i = 0; i < numNotes; ++i)
{
auto prefix = "CueNote" + String (i);
out.writeIntBigEndian (values.getValue (prefix + "TimeStamp", "0").getIntValue());
out.writeShortBigEndian ((short) values.getValue (prefix + "Identifier", "0").getIntValue());
auto comment = values.getValue (prefix + "Text", String());
auto commentLength = jmin (comment.getNumBytesAsUTF8(), (size_t) 65534);
out.writeShortBigEndian ((short) commentLength + 1);
out.write (comment.toUTF8(), commentLength);
out.writeByte (0);
if ((out.getDataSize() & 1) != 0)
out.writeByte (0);
}
}
}
}
}
//==============================================================================
class AiffAudioFormatReader : public AudioFormatReader
{
public:
AiffAudioFormatReader (InputStream* in)
: AudioFormatReader (in, aiffFormatName)
{
using namespace AiffFileHelpers;
if (input->readInt() == chunkName ("FORM"))
{
auto len = input->readIntBigEndian();
auto end = input->getPosition() + len;
auto nextType = input->readInt();
if (nextType == chunkName ("AIFF") || nextType == chunkName ("AIFC"))
{
bool hasGotVer = false;
bool hasGotData = false;
bool hasGotType = false;
while (input->getPosition() < end)
{
auto type = input->readInt();
auto length = (uint32) input->readIntBigEndian();
auto chunkEnd = input->getPosition() + length;
if (type == chunkName ("FVER"))
{
hasGotVer = true;
auto ver = input->readIntBigEndian();
if (ver != 0 && ver != (int) 0xa2805140)
break;
}
else if (type == chunkName ("COMM"))
{
hasGotType = true;
numChannels = (unsigned int) input->readShortBigEndian();
lengthInSamples = input->readIntBigEndian();
bitsPerSample = (unsigned int) input->readShortBigEndian();
bytesPerFrame = (int) ((numChannels * bitsPerSample) >> 3);
unsigned char sampleRateBytes[10];
input->read (sampleRateBytes, 10);
const int byte0 = sampleRateBytes[0];
if ((byte0 & 0x80) != 0
|| byte0 <= 0x3F || byte0 > 0x40
|| (byte0 == 0x40 && sampleRateBytes[1] > 0x1C))
break;
auto sampRate = ByteOrder::bigEndianInt (sampleRateBytes + 2);
sampRate >>= (16414 - ByteOrder::bigEndianShort (sampleRateBytes));
sampleRate = (int) sampRate;
if (length <= 18)
{
// some types don't have a chunk large enough to include a compression
// type, so assume it's just big-endian pcm
littleEndian = false;
}
else
{
auto compType = input->readInt();
if (compType == chunkName ("NONE") || compType == chunkName ("twos"))
{
littleEndian = false;
}
else if (compType == chunkName ("sowt"))
{
littleEndian = true;
}
else if (compType == chunkName ("fl32") || compType == chunkName ("FL32"))
{
littleEndian = false;
usesFloatingPointData = true;
}
else
{
sampleRate = 0;
break;
}
}
}
else if (type == chunkName ("SSND"))
{
hasGotData = true;
auto offset = input->readIntBigEndian();
dataChunkStart = input->getPosition() + 4 + offset;
lengthInSamples = (bytesPerFrame > 0) ? jmin (lengthInSamples, ((int64) length) / (int64) bytesPerFrame) : 0;
}
else if (type == chunkName ("MARK"))
{
auto numCues = (uint16) input->readShortBigEndian();
// these two are always the same for AIFF-read files
metadataValues.set ("NumCuePoints", String (numCues));
metadataValues.set ("NumCueLabels", String (numCues));
for (uint16 i = 0; i < numCues; ++i)
{
auto identifier = (uint16) input->readShortBigEndian();
auto offset = (uint32) input->readIntBigEndian();
auto stringLength = (uint8) input->readByte();
MemoryBlock textBlock;
input->readIntoMemoryBlock (textBlock, stringLength);
// if the stringLength is even then read one more byte as the
// string needs to be an even number of bytes INCLUDING the
// leading length character in the pascal string
if ((stringLength & 1) == 0)
input->readByte();
auto prefixCue = "Cue" + String (i);
metadataValues.set (prefixCue + "Identifier", String (identifier));
metadataValues.set (prefixCue + "Offset", String (offset));
auto prefixLabel = "CueLabel" + String (i);
metadataValues.set (prefixLabel + "Identifier", String (identifier));
metadataValues.set (prefixLabel + "Text", textBlock.toString());
}
}
else if (type == chunkName ("COMT"))
{
auto numNotes = (uint16) input->readShortBigEndian();
metadataValues.set ("NumCueNotes", String (numNotes));
for (uint16 i = 0; i < numNotes; ++i)
{
auto timestamp = (uint32) input->readIntBigEndian();
auto identifier = (uint16) input->readShortBigEndian(); // may be zero in this case
auto stringLength = (uint16) input->readShortBigEndian();
MemoryBlock textBlock;
input->readIntoMemoryBlock (textBlock, stringLength + (stringLength & 1));
auto prefix = "CueNote" + String (i);
metadataValues.set (prefix + "TimeStamp", String (timestamp));
metadataValues.set (prefix + "Identifier", String (identifier));
metadataValues.set (prefix + "Text", textBlock.toString());
}
}
else if (type == chunkName ("INST"))
{
HeapBlock<InstChunk> inst;
inst.calloc (jmax ((size_t) length + 1, sizeof (InstChunk)), 1);
input->read (inst, (int) length);
inst->copyTo (metadataValues);
}
else if (type == chunkName ("basc"))
{
AiffFileHelpers::BASCChunk (*input).addToMetadata (metadataValues);
}
else if (type == chunkName ("cate"))
{
metadataValues.set (AiffAudioFormat::appleTag,
AiffFileHelpers::CATEChunk::read (*input, length));
}
else if ((hasGotVer && hasGotData && hasGotType)
|| chunkEnd < input->getPosition()
|| input->isExhausted())
{
break;
}
input->setPosition (chunkEnd + (chunkEnd & 1)); // (chunks should be aligned to an even byte address)
}
}
}
if (metadataValues.size() > 0)
metadataValues.set ("MetaDataSource", "AIFF");
}
//==============================================================================
bool readSamples (int** destSamples, int numDestChannels, int startOffsetInDestBuffer,
int64 startSampleInFile, int numSamples) override
{
clearSamplesBeyondAvailableLength (destSamples, numDestChannels, startOffsetInDestBuffer,
startSampleInFile, numSamples, lengthInSamples);
if (numSamples <= 0)
return true;
input->setPosition (dataChunkStart + startSampleInFile * bytesPerFrame);
while (numSamples > 0)
{
const int tempBufSize = 480 * 3 * 4; // (keep this a multiple of 3)
char tempBuffer [tempBufSize];
const int numThisTime = jmin (tempBufSize / bytesPerFrame, numSamples);
const int bytesRead = input->read (tempBuffer, numThisTime * bytesPerFrame);
if (bytesRead < numThisTime * bytesPerFrame)
{
jassert (bytesRead >= 0);
zeromem (tempBuffer + bytesRead, (size_t) (numThisTime * bytesPerFrame - bytesRead));
}
if (littleEndian)
copySampleData<AudioData::LittleEndian> (bitsPerSample, usesFloatingPointData,
destSamples, startOffsetInDestBuffer, numDestChannels,
tempBuffer, (int) numChannels, numThisTime);
else
copySampleData<AudioData::BigEndian> (bitsPerSample, usesFloatingPointData,
destSamples, startOffsetInDestBuffer, numDestChannels,
tempBuffer, (int) numChannels, numThisTime);
startOffsetInDestBuffer += numThisTime;
numSamples -= numThisTime;
}
return true;
}
template <typename Endianness>
static void copySampleData (unsigned int bitsPerSample, bool usesFloatingPointData,
int* const* destSamples, int startOffsetInDestBuffer, int numDestChannels,
const void* sourceData, int numChannels, int numSamples) noexcept
{
switch (bitsPerSample)
{
case 8: ReadHelper<AudioData::Int32, AudioData::Int8, Endianness>::read (destSamples, startOffsetInDestBuffer, numDestChannels, sourceData, numChannels, numSamples); break;
case 16: ReadHelper<AudioData::Int32, AudioData::Int16, Endianness>::read (destSamples, startOffsetInDestBuffer, numDestChannels, sourceData, numChannels, numSamples); break;
case 24: ReadHelper<AudioData::Int32, AudioData::Int24, Endianness>::read (destSamples, startOffsetInDestBuffer, numDestChannels, sourceData, numChannels, numSamples); break;
case 32: if (usesFloatingPointData) ReadHelper<AudioData::Float32, AudioData::Float32, Endianness>::read (destSamples, startOffsetInDestBuffer, numDestChannels, sourceData, numChannels, numSamples);
else ReadHelper<AudioData::Int32, AudioData::Int32, Endianness>::read (destSamples, startOffsetInDestBuffer, numDestChannels, sourceData, numChannels, numSamples);
break;
default: jassertfalse; break;
}
}
int bytesPerFrame;
int64 dataChunkStart;
bool littleEndian;
private:
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AiffAudioFormatReader)
};
//==============================================================================
class AiffAudioFormatWriter : public AudioFormatWriter
{
public:
AiffAudioFormatWriter (OutputStream* out, double rate,
unsigned int numChans, unsigned int bits,
const StringPairArray& metadataValues)
: AudioFormatWriter (out, aiffFormatName, rate, numChans, bits)
{
using namespace AiffFileHelpers;
if (metadataValues.size() > 0)
{
// The meta data should have been sanitised for the AIFF format.
// If it was originally sourced from a WAV file the MetaDataSource
// key should be removed (or set to "AIFF") once this has been done
jassert (metadataValues.getValue ("MetaDataSource", "None") != "WAV");
MarkChunk::create (markChunk, metadataValues);
COMTChunk::create (comtChunk, metadataValues);
InstChunk::create (instChunk, metadataValues);
}
headerPosition = out->getPosition();
writeHeader();
}
~AiffAudioFormatWriter() override
{
if ((bytesWritten & 1) != 0)
output->writeByte (0);
writeHeader();
}
//==============================================================================
bool write (const int** data, int numSamples) override
{
jassert (numSamples >= 0);
jassert (data != nullptr && *data != nullptr); // the input must contain at least one channel!
if (writeFailed)
return false;
auto bytes = numChannels * (size_t) numSamples * bitsPerSample / 8;
tempBlock.ensureSize (bytes, false);
switch (bitsPerSample)
{
case 8: WriteHelper<AudioData::Int8, AudioData::Int32, AudioData::BigEndian>::write (tempBlock.getData(), (int) numChannels, data, numSamples); break;
case 16: WriteHelper<AudioData::Int16, AudioData::Int32, AudioData::BigEndian>::write (tempBlock.getData(), (int) numChannels, data, numSamples); break;
case 24: WriteHelper<AudioData::Int24, AudioData::Int32, AudioData::BigEndian>::write (tempBlock.getData(), (int) numChannels, data, numSamples); break;
case 32: WriteHelper<AudioData::Int32, AudioData::Int32, AudioData::BigEndian>::write (tempBlock.getData(), (int) numChannels, data, numSamples); break;
default: jassertfalse; break;
}
if (bytesWritten + bytes >= (size_t) 0xfff00000
|| ! output->write (tempBlock.getData(), bytes))
{
// failed to write to disk, so let's try writing the header.
// If it's just run out of disk space, then if it does manage
// to write the header, we'll still have a useable file..
writeHeader();
writeFailed = true;
return false;
}
bytesWritten += bytes;
lengthInSamples += (uint64) numSamples;
return true;
}
private:
MemoryBlock tempBlock, markChunk, comtChunk, instChunk;
uint64 lengthInSamples = 0, bytesWritten = 0;
int64 headerPosition = 0;
bool writeFailed = false;
void writeHeader()
{
using namespace AiffFileHelpers;
const bool couldSeekOk = output->setPosition (headerPosition);
ignoreUnused (couldSeekOk);
// if this fails, you've given it an output stream that can't seek! It needs
// to be able to seek back to write the header
jassert (couldSeekOk);
auto headerLen = (int) (54 + (markChunk.getSize() > 0 ? markChunk.getSize() + 8 : 0)
+ (comtChunk.getSize() > 0 ? comtChunk.getSize() + 8 : 0)
+ (instChunk.getSize() > 0 ? instChunk.getSize() + 8 : 0));
auto audioBytes = (int) (lengthInSamples * ((bitsPerSample * numChannels) / 8));
audioBytes += (audioBytes & 1);
output->writeInt (chunkName ("FORM"));
output->writeIntBigEndian (headerLen + audioBytes - 8);
output->writeInt (chunkName ("AIFF"));
output->writeInt (chunkName ("COMM"));
output->writeIntBigEndian (18);
output->writeShortBigEndian ((short) numChannels);
output->writeIntBigEndian ((int) lengthInSamples);
output->writeShortBigEndian ((short) bitsPerSample);
uint8 sampleRateBytes[10] = {};
if (sampleRate <= 1)
{
sampleRateBytes[0] = 0x3f;
sampleRateBytes[1] = 0xff;
sampleRateBytes[2] = 0x80;
}
else
{
int mask = 0x40000000;
sampleRateBytes[0] = 0x40;
if (sampleRate >= mask)
{
jassertfalse;
sampleRateBytes[1] = 0x1d;
}
else
{
int n = (int) sampleRate;
int i;
for (i = 0; i <= 32 ; ++i)
{
if ((n & mask) != 0)
break;
mask >>= 1;
}
n = n << (i + 1);
sampleRateBytes[1] = (uint8) (29 - i);
sampleRateBytes[2] = (uint8) ((n >> 24) & 0xff);
sampleRateBytes[3] = (uint8) ((n >> 16) & 0xff);
sampleRateBytes[4] = (uint8) ((n >> 8) & 0xff);
sampleRateBytes[5] = (uint8) (n & 0xff);
}
}
output->write (sampleRateBytes, 10);
if (markChunk.getSize() > 0)
{
output->writeInt (chunkName ("MARK"));
output->writeIntBigEndian ((int) markChunk.getSize());
*output << markChunk;
}
if (comtChunk.getSize() > 0)
{
output->writeInt (chunkName ("COMT"));
output->writeIntBigEndian ((int) comtChunk.getSize());
*output << comtChunk;
}
if (instChunk.getSize() > 0)
{
output->writeInt (chunkName ("INST"));
output->writeIntBigEndian ((int) instChunk.getSize());
*output << instChunk;
}
output->writeInt (chunkName ("SSND"));
output->writeIntBigEndian (audioBytes + 8);
output->writeInt (0);
output->writeInt (0);
jassert (output->getPosition() == headerLen);
}
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AiffAudioFormatWriter)
};
//==============================================================================
class MemoryMappedAiffReader : public MemoryMappedAudioFormatReader
{
public:
MemoryMappedAiffReader (const File& f, const AiffAudioFormatReader& reader)
: 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, sizeof (float) * (size_t) num);
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;
}
}
private:
const bool littleEndian;
template <typename SampleType>
void scanMinAndMax (int64 startSampleInFile, int64 numSamples, Range<float>* results, int numChannelsToRead) const noexcept
{
for (int i = 0; i < numChannelsToRead; ++i)
results[i] = scanMinAndMaxForChannel<SampleType> (i, startSampleInFile, numSamples);
}
template <typename SampleType>
Range<float> scanMinAndMaxForChannel (int channel, int64 startSampleInFile, int64 numSamples) const noexcept
{
return littleEndian ? scanMinAndMaxInterleaved<SampleType, AudioData::LittleEndian> (channel, startSampleInFile, numSamples)
: scanMinAndMaxInterleaved<SampleType, AudioData::BigEndian> (channel, startSampleInFile, numSamples);
}
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MemoryMappedAiffReader)
};
//==============================================================================
AiffAudioFormat::AiffAudioFormat() : AudioFormat (aiffFormatName, ".aiff .aif") {}
AiffAudioFormat::~AiffAudioFormat() {}
Array<int> AiffAudioFormat::getPossibleSampleRates()
{
return { 22050, 32000, 44100, 48000, 88200, 96000, 176400, 192000 };
}
Array<int> AiffAudioFormat::getPossibleBitDepths()
{
return { 8, 16, 24 };
}
bool AiffAudioFormat::canDoStereo() { return true; }
bool AiffAudioFormat::canDoMono() { return true; }
#if JUCE_MAC
bool AiffAudioFormat::canHandleFile (const File& f)
{
if (AudioFormat::canHandleFile (f))
return true;
auto type = f.getMacOSType();
// (NB: written as hex to avoid four-char-constant warnings)
return type == 0x41494646 /* AIFF */ || type == 0x41494643 /* AIFC */
|| type == 0x61696666 /* aiff */ || type == 0x61696663 /* aifc */;
}
#endif
AudioFormatReader* AiffAudioFormat::createReaderFor (InputStream* sourceStream, bool deleteStreamIfOpeningFails)
{
std::unique_ptr<AiffAudioFormatReader> w (new AiffAudioFormatReader (sourceStream));
if (w->sampleRate > 0 && w->numChannels > 0)
return w.release();
if (! deleteStreamIfOpeningFails)
w->input = nullptr;
return nullptr;
}
MemoryMappedAudioFormatReader* AiffAudioFormat::createMemoryMappedReader (const File& file)
{
return createMemoryMappedReader (file.createInputStream());
}
MemoryMappedAudioFormatReader* AiffAudioFormat::createMemoryMappedReader (FileInputStream* fin)
{
if (fin != nullptr)
{
AiffAudioFormatReader reader (fin);
if (reader.lengthInSamples > 0)
return new MemoryMappedAiffReader (fin->getFile(), reader);
}
return nullptr;
}
AudioFormatWriter* AiffAudioFormat::createWriterFor (OutputStream* out,
double sampleRate,
unsigned int numberOfChannels,
int bitsPerSample,
const StringPairArray& metadataValues,
int /*qualityOptionIndex*/)
{
if (out != nullptr && getPossibleBitDepths().contains (bitsPerSample))
return new AiffAudioFormatWriter (out, sampleRate, numberOfChannels,
(unsigned int) bitsPerSample, metadataValues);
return nullptr;
}
} // namespace juce