video: switch from using display aspect to sample aspect

MPlayer traditionally always used the display aspect ratio, e.g. 16:9,
while FFmpeg uses the sample (aka pixel) aspect ratio.

Both have a bunch of advantages and disadvantages. Actually, it seems
using sample aspect ratio is generally nicer. The main reason for the
change is making mpv closer to how FFmpeg works in order to make life
easier. It's also nice that everything uses integer fractions instead
of floats now (except --video-aspect option/property).

Note that there is at least 1 user-visible change: vf_dsize now does
not set the display size, only the display aspect ratio. This is
because the image_params d_w/d_h fields did not just set the display
aspect, but also the size (except in encoding mode).

1 files changed, 3 insertions, 3 deletions

diff --git a/video/out/win_state.c b/video/out/win_state.c
index f48f628173..a80a650315 100644
--- a/video/out/win_state.c
+++ b/video/out/win_state.c
@@ -82,12 +82,12 @@ void vo_calc_window_geometry(struct vo *vo, const struct mp_rect *screen,
     // The case of calling this function even though no video was configured
     // yet (i.e. vo->params==NULL) happens when vo_opengl creates a hidden
     // window in order to create an OpenGL context.
-    struct mp_image_params params = { .d_w = 320, .d_h = 200 };
+    struct mp_image_params params = { .w = 320, .h = 200 };
     if (vo->params)
         params = *vo->params;
 
-    int d_w = params.d_w;
-    int d_h = params.d_h;
+    int d_w, d_h;
+    mp_image_params_get_dsize(&params, &d_w, &d_h);
     if ((vo->driver->caps & VO_CAP_ROTATE90) && params.rotate % 180 == 90)
         MPSWAP(int, d_w, d_h);
     d_w = MPCLAMP(d_w * opts->window_scale, 1, 16000);