media/sound/MidiUtils.java

125      * convert tick to microsecond with given tempo.
129     public static long ticks2microsec(long tick, double tempoMPQ, int resolution) {
130         return (long) (((double) tick) * tempoMPQ / resolution);
139         // do not round to nearest tick
145      * Given a tick, convert to microsecond
148     public static long tick2microsecond(Sequence seq, long tick, TempoCache cache) {
150             double seconds = ((double)tick / (double)(seq.getDivisionType() * seq.getResolution()));
173             || ticks[snapshotIndex] > tick) {
178             // this implementation needs a tempo event at tick 0!
180             while (i < cacheCount && ticks[i] <= tick) {
186                 + ticks2microsec(tick - ticks[snapshotIndex],
196      * Given a microsecond time, convert to tick.
205             long tick = (long) dTick;
207                 cache.currTempo = (int) cache.getTempoMPQAt(tick);
209             return tick;
221         long us = 0; long tick = 0; int newReadPos = 0; int i = 1;
224         // to find the right tick
236             tick = ticks[i - 1] + microsec2ticks(micros - us, tempos[i - 1], resolution);
237             if (Printer.debug) Printer.debug("microsecond2tick(" + (micros / 1000)+") = "+tick+" ticks.");
238             //if (Printer.debug) Printer.debug("   -> convert back = " + (tick2microsecond(seq, tick, null) / 1000)+" microseconds");
241         return tick;
247      * @param tick  tick number of index to be found in array
248      * @return index in track which is on or after "tick".
249      *   if no entries are found that follow after tick, track.size() is returned
251     public static int tick2index(Track track, long tick) {
253         if (tick > 0) {
259                 // tick of estimate
261                 if (t == tick) {
263                 } else if (t < tick) {
266                         // "or after tick"
271                 } else { // if (t>tick)
352         float getTempoMPQAt(long tick) {
353             return getTempoMPQAt(tick, -1.0f);
356         synchronized float getTempoMPQAt(long tick, float startTempoMPQ) {
358                 if (ticks[i] > tick) {