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Attempted via linear search to implement PCMTrack::get_next_event.

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This commit is contained in:
Thomas Harte 2016-07-10 16:17:25 -04:00
parent f9510c1b67
commit 845a00ccef
1 changed files with 29 additions and 2 deletions
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31
Storage/Disk/Formats/G64.cpp
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@ -161,8 +161,35 @@ PCMTrack::PCMTrack(PCMSegment segment)
PCMTrack::Event PCMTrack::get_next_event() PCMTrack::Event PCMTrack::get_next_event()
{ {
PCMTrack::Event new_event; // find the next 1 in the input stream, keeping count of length as we go, and assuming it's going
return new_event; // to be a flux transition
_next_event.type = Track::Event::FluxTransition;
_next_event.length.length = 0;
while(_segment_pointer < _segments.size())
{
unsigned int clock_multiplier = _track_clock_rate / _segments[_segment_pointer].duration.clock_rate;
const uint8_t *segment_data = _segments[_segment_pointer].data.get();
while(_bit_pointer < _segments[_segment_pointer].duration.length)
{
// for timing simplicity, bits are modelled as happening at the end of their window
int bit = segment_data[_bit_pointer >> 3] & (1 << (_bit_pointer&7));
_bit_pointer++;
_next_event.length.length += clock_multiplier;
if(bit) return _next_event;
}
_bit_pointer = 0;
_segment_pointer++;
}
// check whether we actually reached the index hole
if(_segment_pointer == _segments.size())
{
_segment_pointer = 0;
_next_event.type = Track::Event::IndexHole;
}
return _next_event;
} }
void PCMTrack::fix_length() void PCMTrack::fix_length()