diff options
Diffstat (limited to 'Source')
| -rw-r--r-- | Source/Core/Core/HW/VideoInterface.cpp | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/Source/Core/Core/HW/VideoInterface.cpp b/Source/Core/Core/HW/VideoInterface.cpp index be197f4915..a835fcd4bc 100644 --- a/Source/Core/Core/HW/VideoInterface.cpp +++ b/Source/Core/Core/HW/VideoInterface.cpp @@ -687,14 +687,27 @@ float VideoInterfaceManager::GetAspectRatio() const void VideoInterfaceManager::UpdateParameters() { - u32 equ_hl = 3 * m_vertical_timing_register.EQU; - u32 acv_hl = 2 * m_vertical_timing_register.ACV; - m_odd_field_first_hl = equ_hl + m_vblank_timing_odd.PRB; - m_odd_field_last_hl = m_odd_field_first_hl + acv_hl - 1; + const u32 equ_hl = 3 * m_vertical_timing_register.EQU; + const u32 acv_hl = 2 * m_vertical_timing_register.ACV; - m_even_field_first_hl = equ_hl + m_vblank_timing_even.PRB + GetHalfLinesPerOddField(); + // Odd field: + m_odd_field_first_hl = equ_hl + m_vblank_timing_odd.PRB; + const u32 odd_field_end = m_odd_field_first_hl + acv_hl; + m_odd_field_last_hl = odd_field_end - 1; + + // Many GC games establish differing PRB/PSB values for odd/even fields. + // Added together they are equal, but because we OutputField *before* PSB + // that can result in inconsistent pacing between odd/even fields. + // This will adjust the even-field to match the odd-field pacing, + // accounting for the otherwise-ignored even-field PSB. + const s32 odd_even_psb_diff = m_vblank_timing_odd.PSB - m_vblank_timing_even.PSB; + + // Even field: + m_even_field_first_hl = odd_field_end + m_vblank_timing_odd.PSB + equ_hl + + m_vblank_timing_even.PRB - odd_even_psb_diff; m_even_field_last_hl = m_even_field_first_hl + acv_hl - 1; + // Refresh rate: m_target_refresh_rate_numerator = m_system.GetSystemTimers().GetTicksPerSecond() * 2; m_target_refresh_rate_denominator = GetTicksPerEvenField() + GetTicksPerOddField(); m_target_refresh_rate = |