OpenShot Audio Library | OpenShotAudio 0.3.2
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#include <juce_MidiFile.h>
Public Member Functions | |
MidiFile () | |
~MidiFile () | |
MidiFile (const MidiFile &) | |
MidiFile & | operator= (const MidiFile &) |
MidiFile (MidiFile &&) | |
MidiFile & | operator= (MidiFile &&) |
int | getNumTracks () const noexcept |
const MidiMessageSequence * | getTrack (int index) const noexcept |
void | addTrack (const MidiMessageSequence &trackSequence) |
void | clear () |
short | getTimeFormat () const noexcept |
void | setTicksPerQuarterNote (int ticksPerQuarterNote) noexcept |
void | setSmpteTimeFormat (int framesPerSecond, int subframeResolution) noexcept |
void | findAllTempoEvents (MidiMessageSequence &tempoChangeEvents) const |
void | findAllTimeSigEvents (MidiMessageSequence &timeSigEvents) const |
void | findAllKeySigEvents (MidiMessageSequence &keySigEvents) const |
double | getLastTimestamp () const |
bool | readFrom (InputStream &sourceStream, bool createMatchingNoteOffs=true) |
bool | writeTo (OutputStream &destStream, int midiFileType=1) const |
void | convertTimestampTicksToSeconds () |
Reads/writes standard midi format files.
To read a midi file, create a MidiFile object and call its readFrom() method. You can then get the individual midi tracks from it using the getTrack() method.
To write a file, create a MidiFile object, add some MidiMessageSequence objects to it using the addTrack() method, and then call its writeTo() method to stream it out.
Definition at line 41 of file juce_MidiFile.h.
juce::MidiFile::MidiFile | ( | ) |
Creates an empty MidiFile object.
Definition at line 155 of file juce_MidiFile.cpp.
juce::MidiFile::~MidiFile | ( | ) |
Destructor.
Definition at line 156 of file juce_MidiFile.cpp.
Creates a copy of another MidiFile.
Definition at line 158 of file juce_MidiFile.cpp.
juce::MidiFile::MidiFile | ( | MidiFile && | other | ) |
Creates a copy of another MidiFile.
Definition at line 171 of file juce_MidiFile.cpp.
void juce::MidiFile::addTrack | ( | const MidiMessageSequence & | trackSequence | ) |
Adds a midi track to the file. This will make its own internal copy of the sequence that is passed-in.
Definition at line 200 of file juce_MidiFile.cpp.
void juce::MidiFile::clear | ( | ) |
Removes all midi tracks from the file.
Definition at line 184 of file juce_MidiFile.cpp.
Referenced by operator=(), and readFrom().
void juce::MidiFile::convertTimestampTicksToSeconds | ( | ) |
Converts the timestamp of all the midi events from midi ticks to seconds.
This will use the midi time format and tempo/time signature info in the tracks to convert all the timestamps to absolute values in seconds.
Definition at line 347 of file juce_MidiFile.cpp.
void juce::MidiFile::findAllKeySigEvents | ( | MidiMessageSequence & | keySigEvents | ) | const |
Makes a list of all the time-signature meta-events from all tracks in the midi file.
keySigEvents | a list to which all the events will be added |
Definition at line 232 of file juce_MidiFile.cpp.
void juce::MidiFile::findAllTempoEvents | ( | MidiMessageSequence & | tempoChangeEvents | ) | const |
Makes a list of all the tempo-change meta-events from all tracks in the midi file. Useful for finding the positions of all the tempo changes in a file.
tempoChangeEvents | a list to which all the events will be added |
Definition at line 222 of file juce_MidiFile.cpp.
Referenced by convertTimestampTicksToSeconds().
void juce::MidiFile::findAllTimeSigEvents | ( | MidiMessageSequence & | timeSigEvents | ) | const |
Makes a list of all the time-signature meta-events from all tracks in the midi file. Useful for finding the positions of all the tempo changes in a file.
timeSigEvents | a list to which all the events will be added |
Definition at line 227 of file juce_MidiFile.cpp.
Referenced by convertTimestampTicksToSeconds().
double juce::MidiFile::getLastTimestamp | ( | ) | const |
Returns the latest timestamp in any of the tracks. (Useful for finding the length of the file).
Definition at line 237 of file juce_MidiFile.cpp.
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noexcept |
Returns the number of tracks in the file.
Definition at line 190 of file juce_MidiFile.cpp.
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noexcept |
Returns the raw time format code that will be written to a stream.
After reading a midi file, this method will return the time-format that was read from the file's header. It can be changed using the setTicksPerQuarterNote() or setSmpteTimeFormat() methods.
If the value returned is positive, it indicates the number of midi ticks per quarter-note - see setTicksPerQuarterNote().
It it's negative, the upper byte indicates the frames-per-second (but negative), and the lower byte is the number of ticks per frame - see setSmpteTimeFormat().
Definition at line 206 of file juce_MidiFile.cpp.
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noexcept |
Returns a pointer to one of the tracks in the file.
Definition at line 195 of file juce_MidiFile.cpp.
Copies from another MidiFile object
Definition at line 163 of file juce_MidiFile.cpp.
Copies from another MidiFile object
Definition at line 177 of file juce_MidiFile.cpp.
bool juce::MidiFile::readFrom | ( | InputStream & | sourceStream, |
bool | createMatchingNoteOffs = true |
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Reads a midi file format stream.
After calling this, you can get the tracks that were read from the file by using the getNumTracks() and getTrack() methods.
The timestamps of the midi events in the tracks will represent their positions in terms of midi ticks. To convert them to seconds, use the convertTimestampTicksToSeconds() method.
sourceStream | the source stream |
createMatchingNoteOffs | if true, any missing note-offs for previous note-ons will be automatically added at the end of the file by calling MidiMessageSequence::updateMatchedPairs on each track. |
Definition at line 248 of file juce_MidiFile.cpp.
Sets the time format to use when this file is written to a stream.
If this is called, the file will be written using absolute times, rather than bars/beats as would be the case if setTicksPerBeat() had been called instead.
framesPerSecond | must be 24, 25, 29 or 30 |
subframeResolution | the sub-second resolution, e.g. 4 (midi time code), 8, 10, 80 (SMPTE bit resolution), or 100. For millisecond timing, setSmpteTimeFormat (25, 40) |
Definition at line 216 of file juce_MidiFile.cpp.
Sets the time format to use when this file is written to a stream.
If this is called, the file will be written as bars/beats using the specified resolution, rather than SMPTE absolute times, as would be used if setSmpteTimeFormat() had been called instead.
ticksPerQuarterNote | e.g. 96, 960 |
Definition at line 211 of file juce_MidiFile.cpp.
bool juce::MidiFile::writeTo | ( | OutputStream & | destStream, |
int | midiFileType = 1 |
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) | const |
Writes the midi tracks as a standard midi file. The midiFileType value is written as the file's format type, which can be 0, 1 or 2 - see the midi file spec for more info about that.
destStream | the destination stream |
midiFileType | the type of midi file |
Definition at line 367 of file juce_MidiFile.cpp.