88 lines
2.6 KiB
Text
88 lines
2.6 KiB
Text
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XMI File Format
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(Incomplete - Under Construction)
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Document version 1
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Authored by Chris Ison chrisisonwildcode@gmail.com
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Last Edited 24 May 2014
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Copyright (C) 2014 WildMidi Developers
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This document is licensed under the
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Creative Commons Attribution-ShareAlike 4.0 International License.
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To view a copy of this license, visit
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http://creativecommons.org/licenses/by-sa/4.0/
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Introduction
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This document describes the XMI format as used by the WildMIDI project.
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It is not a complete description of the XMI file format and only those
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parts that have been decyphered and are relevant to the WildMidi project
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are described here. Unfortunately we cannot answer questions about the
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format that are not described within this document. If you feel there
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is an error in this document please feel free to report it as a bug at
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https://github.com/Mindwerks/wildmidi/issues/
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Description
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// FORM DATA
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{
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uint8_t text[4] = "FORM";
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uint32_t size_of_data_before_chunks;
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uint8_t text[8] = "XDIRINFO";
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uint8_t unknown[4] = { 0x00, 0x00, 0x00, 0x02 };
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uint8_t form_count;
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uint8_t unknown_data[size_of_data_before_chunks - 13]
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uint8_t text[4] = "CAT ";
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uint32_t size_of_CAT;
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uint8_t text[4] = "XMID";
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{
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// XMID Chunks
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uint8_t text[4] = "FORM";
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uint32_t size_of_form;
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uint8_t text[4] = "XMID";
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{
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{
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uint8_t text[4] = "TIMB";
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uint32_t TIMB_size;
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uint8_t TIMB_data[TIMB_size] = { 8bit patch, 8bit bank, ... }
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}
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// OR
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{
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uint8_t text[4] = "RBRN"
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uint32_t RBRN_size;
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uint8_t unknown[RBRN_size];
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}
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// OR
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{
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uint8_t text[4] = "EVNT"
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uint32_t EVNT_size;
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uint8_t MIDI_data[EVNT_size] {
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// All events and delta values stored as with standard MIDI,
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// EXCEPT for there is no "Note Off" and "Note On" extra data
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// after the velocity that states the length of the note
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// in delta ticks stored in MIDI variable length format.
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// ALSO NOTE that only the first TEMPO event is used,
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// all others are ignored.
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// Example Note on may be stored like
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// uint8_t event_data[] = { 0x90, 0x24, 0x64, 0xA3 }
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// uint8_t delta_ticks[] = { 0xA3 }
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// uint8_t event_data[] = { 0x90, 0x48, 0x64, 0x23, 0xA3 }
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// See the MIDI file format for more information
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...
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}
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}
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...
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}
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}
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}
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