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Fixed location calculation, up to a point.

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This commit is contained in:
Thomas Harte 2016-08-03 22:33:00 -04:00
parent 9af9b28baf
commit e57ab1025d
1 changed files with 6 additions and 6 deletions
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12
Storage/Disk/PCMTrack.cpp
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@ -67,26 +67,26 @@ Time PCMTrack::seek_to(Time time_since_index_hole)
// pick a common clock rate for counting time on this track and multiply up the time being sought appropriately
Time time_so_far;
time_so_far.clock_rate = NumberTheory::least_common_multiple(_track_clock_rate, time_since_index_hole.clock_rate);
time_so_far.clock_rate = NumberTheory::least_common_multiple(_next_event.length.clock_rate, time_since_index_hole.clock_rate);
time_since_index_hole.length *= time_so_far.clock_rate / time_since_index_hole.clock_rate;
time_since_index_hole.clock_rate = time_so_far.clock_rate;
while(_segment_pointer < _segments.size())
{
// determine how long this segment is in terms of the master clock
unsigned int clock_multiplier = time_so_far.clock_rate / _segments[_segment_pointer].length_of_a_bit.clock_rate;
unsigned int resolution_in_this_segment = _segments[_segment_pointer].length_of_a_bit.length * clock_multiplier;
unsigned int time_in_this_segment = resolution_in_this_segment * _segments[_segment_pointer].number_of_bits;
unsigned int clock_multiplier = time_so_far.clock_rate / _next_event.length.clock_rate;
unsigned int bit_length = ((clock_multiplier / _track_clock_rate) / _segments[_segment_pointer].length_of_a_bit.clock_rate) * _segments[_segment_pointer].length_of_a_bit.length;
unsigned int time_in_this_segment = bit_length * _segments[_segment_pointer].number_of_bits;
// if this segment goes on longer than the time being sought, end here
unsigned int time_remaining = time_since_index_hole.length - time_so_far.length;
if(time_in_this_segment >= time_remaining)
{
// get the amount of time actually to move into this segment
unsigned int time_found = time_remaining - (time_remaining % resolution_in_this_segment);
unsigned int time_found = time_remaining - (time_remaining % bit_length);
// resolve that into the stateful bit count
_bit_pointer = time_remaining / resolution_in_this_segment;
_bit_pointer = time_remaining / bit_length;
// update and return the time sought to
time_so_far.length += time_found;