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Sought to ensure that communicating a colour burst in multiple parts doesn't ruin the phase.

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This commit is contained in:
Thomas Harte 2017-02-06 18:27:44 -05:00
parent 6bcf95042c
commit fcf8cafb5d
1 changed files with 2 additions and 1 deletions
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3
Outputs/CRT/CRT.cpp
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@ -222,6 +222,7 @@ void CRT::advance_cycles(unsigned int number_of_cycles, bool hsync_requested, bo
(*(uint16_t *)&input_buffer[position + SourceVertexOffsetOfOutputStart + 2]) = output_y; (*(uint16_t *)&input_buffer[position + SourceVertexOffsetOfOutputStart + 2]) = output_y;
} }
}); });
colour_burst_amplitude_ = 0;
} }
is_writing_composite_run_ ^= true; is_writing_composite_run_ ^= true;
} }
@ -284,7 +285,7 @@ void CRT::output_scan(const Scan *const scan)
// simplified colour burst logic: if it's within the back porch we'll take it // simplified colour burst logic: if it's within the back porch we'll take it
if(scan->type == Scan::Type::ColourBurst) if(scan->type == Scan::Type::ColourBurst)
{ {
if(horizontal_flywheel_->get_current_time() < (horizontal_flywheel_->get_standard_period() * 12) >> 6) if(!colour_burst_amplitude_ && horizontal_flywheel_->get_current_time() < (horizontal_flywheel_->get_standard_period() * 12) >> 6)
{ {
unsigned int position_phase = (horizontal_flywheel_->get_current_time() * colour_cycle_numerator_ * 256) / phase_denominator_; unsigned int position_phase = (horizontal_flywheel_->get_current_time() * colour_cycle_numerator_ * 256) / phase_denominator_;
colour_burst_phase_ = (position_phase + scan->phase) & 255; colour_burst_phase_ = (position_phase + scan->phase) & 255;