Temporal: fix logic during ::get_grid that ignored if rounding did nothing
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@ -1583,7 +1583,15 @@ TempoMap::get_grid (TempoMapPoints& ret, superclock_t start, superclock_t end, u
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* in effect at that time.
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*/
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bbt = metric.meter().round_up_to_beat (bbt);
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const BBT_Time new_bbt = metric.meter().round_up_to_beat (bbt);
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if (new_bbt != bbt) {
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bbt = new_bbt;
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/* rounded up, determine new starting superclock position */
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DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("new bbt for start (rounded up) = %1\n", bbt));
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for (Tempos::iterator tt = _tempos.begin(); tt != _tempos.end() && tt->sclock() < start; ++tt) { t = tt; }
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for (Meters::iterator mm = _meters.begin(); mm != _meters.end() && mm->sclock() < start; ++mm) { m = mm; }
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@ -1593,16 +1601,24 @@ TempoMap::get_grid (TempoMapPoints& ret, superclock_t start, superclock_t end, u
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metric = TempoMetric (*t, *m);
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DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("metric in effect at %1 = %2\n", start, metric));
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/* recompute superclock position */
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superclock_t new_start = metric.superclock_at (bbt);
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DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("metric says that %1 is at %2\n", bbt, new_start));
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if (new_start < start) {
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abort ();
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}
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start = new_start;
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} else {
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DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("%1 was on a beat, no rounding up necessary\n", bbt));
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}
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} else {
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/* this rounding cannot change the meter in effect, because it
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@ -1616,6 +1632,8 @@ TempoMap::get_grid (TempoMapPoints& ret, superclock_t start, superclock_t end, u
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++bar.bars;
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}
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if (bar != bbt) {
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bbt = bar;
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for (Tempos::iterator tt = _tempos.begin(); tt != _tempos.end() && tt->bbt() < bbt; ++tt) { t = tt; }
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@ -1630,6 +1648,10 @@ TempoMap::get_grid (TempoMapPoints& ret, superclock_t start, superclock_t end, u
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metric = TempoMetric (*t, *m);
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start = metric.superclock_at (bbt);
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} else {
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DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("%1 was on a bar, no round down to bar necessary\n", bbt));
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}
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}
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/* advance t, m and b so that the point to the *next*
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