Mercurial > hg > smallbox
view util/matlab_midi/getTempoChanges.m @ 239:71128ec3e532 ver_2.0_beta
added documentation file/folder
author | luisf <luis.figueira@eecs.qmul.ac.uk> |
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date | Wed, 25 Apr 2012 13:06:28 +0100 |
parents | a30e8bd6d948 |
children |
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function [tempos,tempos_time]=getTempoChanges(midi) % [tempos,tempos_time]=getTempoChanges(midi) % % input: a midi struct from readmidi.m % output: % tempos = tempo values indexed by tempos_time % tempos_time is in units of ticks % % should tempo changes effect across tracks? across channels? % % Copyright (c) 2009 Ken Schutte % more info at: http://www.kenschutte.com/midi tempos = []; tempos_time = []; for i=1:length(midi.track) cumtime=0; for j=1:length(midi.track(i).messages) cumtime = cumtime+midi.track(i).messages(j).deltatime; % if (strcmp(midi.track(i).messages(j).name,'Set Tempo')) if (midi.track(i).messages(j).midimeta==0 && midi.track(i).messages(j).type==81) tempos_time(end+1) = cumtime; d = midi.track(i).messages(j).data; tempos(end+1) = d(1)*16^4 + d(2)*16^2 + d(3); end end end