lmms::MidiFile::Section Class Reference

Base class for sections of MIDI file. More...

Inheritance diagram for lmms::MidiFile::Section:

Public Attributes
std::vector< std::uint8_t >	m_buffer
	Constant-capacity buffer vector to be written to stream.

Protected Member Functions
	Section ()
	Reserve constant space for BufferSize capacity vector.
void	writeBytes (std::span< const std::uint8_t > bytes)
	Write bytes to buffer.
void	writeBytes (std::initializer_list< std::uint8_t > bytes)
	Write bytes to buffer.
void	writeVarLength (std::uint32_t val)
	Write a MIDI-compatible variable length stream.
void	writeBigEndian4 (std::uint32_t val)
	Buffer gets four 8-bit values from left to right.
void	writeBigEndian2 (std::uint16_t val)
	Buffer gets two 8-bit values from left to right.
virtual void	writeToBuffer ()
	Write section info to buffer.

Detailed Description

Base class for sections of MIDI file.

Constructor & Destructor Documentation

Section()

lmms::MidiFile::Section::Section ( )

protected

Reserve constant space for BufferSize capacity vector.

Member Function Documentation

writeBigEndian2()

void lmms::MidiFile::Section::writeBigEndian2 ( std::uint16_t val )

protected

Buffer gets two 8-bit values from left to right.

writeBigEndian4()

void lmms::MidiFile::Section::writeBigEndian4 ( std::uint32_t val )

protected

Buffer gets four 8-bit values from left to right.

writeBytes() [1/2]

void lmms::MidiFile::Section::writeBytes ( std::initializer_list< std::uint8_t > bytes )

protected

Write bytes to buffer.

Parameters

bytes

List of bytes to be written TODO C++26: Remove once std::span supports construction from std::initializer_list

writeBytes() [2/2]

void lmms::MidiFile::Section::writeBytes ( std::span< const std::uint8_t > bytes )

protected

Write bytes to buffer.

Parameters

bytes

List of bytes to be written

writeToBuffer()

virtual void lmms::MidiFile::Section::writeToBuffer ( )

inlineprotectedvirtual

Write section info to buffer.

Reimplemented in lmms::MidiFile::Header, and lmms::MidiFile::Track.

writeVarLength()

void lmms::MidiFile::Section::writeVarLength ( std::uint32_t val )

protected

Write a MIDI-compatible variable length stream.

Parameters

val	A four-byte value

The MIDI format is a little strange, and makes use of so-called variable length quantities. These quantities are a stream of bytes. If the most significant bit is 1, then more bytes follow. If it is zero, then the byte in question is the last in the stream.

Member Data Documentation

m_buffer

std::vector<std::uint8_t> lmms::MidiFile::Section::m_buffer

Constant-capacity buffer vector to be written to stream.

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The documentation for this class was generated from the following files:

• plugins/MidiExport/MidiFile.h
• plugins/MidiExport/MidiFile.cpp