SMF format 1 to 0 tool.

sample/midiformat.php

@@ -0,0 +1,76 @@
+<?php
+
+require_once 'IO/MIDI.php';
+
+$options = getopt("f:v:");
+
+function usage() {
+    echo "Usage: php midiformat.php -f <midi_file> -v <smf version>\n";
+    echo "ex) php midiformat.php -f in.mid -v 0\n";
+//    echo "ex) php midiformat.php -f in.mid -v 1\n";
+}
+
+if ((isset($options['f']) === false) || (is_readable($options['f']) === false) || (isset($options['v']) === false)) {
+    usage();
+    exit(1);
+}
+
+$mididata = file_get_contents($options['f']);
+$smf_version = (int)$options['v'];
+
+if ($smf_version !== 0) {
+    fprintf(STDERR, "smf_version:$smf_version is not implemented yet.");
+    usage();
+    exit(1);
+}
+
+$midi = new IO_MIDI();
+$midi->parse($mididata);
+
+if ($midi->header['header']['Format'] === $smf_version) {
+    fprintf(STDERR, "Warning: smf version($smf_version) remain unchanged.\n");
+    echo $mididata;
+}
+
+// format 0 routine.
+
+$first_track_key = null;
+$first_track_value = null;
+
+$allTrack = array();
+$numberOfTracks = 0; // format 0;
+foreach ($midi->tracks as $key => $value) {
+    if (is_null($first_track_key)) {
+        $first_track_key = $key;
+        $first_track_value = $value;
+    }
+    $advance = 0;
+    foreach ($value["track"] as $key2 => $value2) {
+        $advance += $value2['DeltaTime'];
+	$channel = isset($value2['MIDIChannel'])?($value2['MIDIChannel']):0;
+	$advance_ch = sprintf("%d%02d", $advance, $channel);
+	$allTrack[$advance_ch] = $value2;
+    }
+}
+
+ksort($allTrack);
+
+$midi->header['header']['Format'] =$smf_version;
+$midi->header['header']['NumberOfTracks'] = 1; // format 0;
+$prev_advance = 0;
+foreach ($allTrack as $advance_ch => $value) {
+    $advance = (int) ($advance_ch / 100);
+    $allTrack[$advance_ch]['DeltaTime'] = $advance - $prev_advance;
+    $prev_advance = $advance;
+}
+
+$allTrack = array_values($allTrack);
+
+$first_track_value['track'] = $allTrack;
+$midi->tracks = array($first_track_key => $first_track_value);
+
+$opts = array();
+
+// $opts['runningstatus'] = true;
+
+echo $midi->build($opts);