coon42 / emidi Goto Github PK

Add a cache so reading MIDI data from slow media like SD-Cards won't lead to real time issues

Implement an alternative mode where pitch bend messages are converted into NoteOn / NoteOff events, by calculating the notes.

Catch2 has ditched its single header include for a while. Also the constant SIGSTKSZ has been changed from a constant to a dynamic value, which breaks the legacy build and requires a hotfix currently. Thus a local compatibility repository is needed for now, which should be avoided.

nanosleep does overflow on waiting times of a few microseconds. As a workaround usleep is used. Since this is depricated, nanosleep should be used again later.

MIDI 1 files are like MIDI 0 but have a dedicated track for each channel. The tracks are saved after another, so multiple file pointers and permanent seeking is required here.

• Minimum code footprint
• Minimum RAM footprint

For this #14 has to be fixed first

Most constants are located in midifile.h. To remove the dependency to midifile.h the constants like MIDI_EVENT_NOTE_OFF, MIDI_META_SEQUENCE_NUMBER etc. should be moved to an extra header. There should also be constants for controllers and programs.

As a preparation for doxygen and to enable compiling for different platforms (Linux, Arm and Windows) a cmake build system is implemented.

Implement hal which allows playback from memory so midi files can be put into flash memory

When it is possible to write midi files there should be an option to "compress" midi files:

• Use running status +NoteOn with zero velocity trick
• Calculate minimum MIDI resolution without loosing precision
• Convert to MIDI 0

Wait time between MIDI events should be shortend or set to 0, when playback is late.