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x11: fix display FPS detection for interlaced modes

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In interlaced modes, we output fields, not complete frames, so the
framerate doubles.

The method to calculate this was borrowed from xrandr code.

Hopefully fixes #1224.
This commit is contained in:
wm4 2014-10-27 16:17:46 +01:00
parent a95ce07273
commit fcc360ccad
1 changed files with 6 additions and 1 deletions
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7
video/out/x11_common.c
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@ -365,10 +365,15 @@ static void xrandr_read(struct vo_x11_state *x11)
continue;
if (x11->num_displays >= MAX_DISPLAYS)
continue;
double vTotal = m.vTotal;
if (m.modeFlags & RR_DoubleScan)
vTotal *= 2;
if (m.modeFlags & RR_Interlace)
vTotal /= 2;
struct xrandr_display d = {
.rc = { crtc->x, crtc->y,
crtc->x + crtc->width, crtc->y + crtc->height },
.fps = m.dotClock / (m.hTotal * (double)m.vTotal),
.fps = m.dotClock / (m.hTotal * vTotal),
};
int num = x11->num_displays++;
MP_VERBOSE(x11, "Display %d: [%d, %d, %d, %d] @ %f FPS\n",