vo: add --video-crop

Just cropping by VO that works with hwdec.

Fixes: #12222

2 files changed, 32 insertions, 0 deletions

diff --git a/common/common.c b/common/common.c
index 79f135a516..e59db7e906 100644
--- a/common/common.c
+++ b/common/common.c
@@ -126,6 +126,37 @@ bool mp_rect_equals(const struct mp_rect *rc1, const struct mp_rect *rc2)
            rc1->x1 == rc2->x1 && rc1->y1 == rc2->y1;
 }
 
+// Rotate mp_rect by 90 degrees increments
+void mp_rect_rotate(struct mp_rect *rc, int w, int h, int rotation)
+{
+    rotation %= 360;
+
+    if (rotation >= 180) {
+        rotation -= 180;
+        MPSWAP(int, rc->x0, rc->x1);
+        MPSWAP(int, rc->y0, rc->y1);
+    }
+
+    if (rotation == 90) {
+        *rc = (struct mp_rect) {
+            .x0 = rc->y1,
+            .y0 = rc->x0,
+            .x1 = rc->y0,
+            .y1 = rc->x1,
+        };
+    }
+
+    if (rc->x1 < rc->x0) {
+        rc->x0 = w - rc->x0;
+        rc->x1 = w - rc->x1;
+    }
+
+    if (rc->y1 < rc->y0) {
+        rc->y0 = h - rc->y0;
+        rc->y1 = h - rc->y1;
+    }
+}
+
 // Compute rc1-rc2, put result in res_array, return number of rectangles in
 // res_array. In the worst case, there are 4 rectangles, so res_array must
 // provide that much storage space.
diff --git a/common/common.h b/common/common.h
index 93a8ded918..a30a5d6e0c 100644
--- a/common/common.h
+++ b/common/common.h
@@ -109,6 +109,7 @@ bool mp_rect_contains(struct mp_rect *rc, int x, int y);
 bool mp_rect_equals(const struct mp_rect *rc1, const struct mp_rect *rc2);
 int mp_rect_subtract(const struct mp_rect *rc1, const struct mp_rect *rc2,
                      struct mp_rect res_array[4]);
+void mp_rect_rotate(struct mp_rect *rc, int w, int h, int rotation);
 
 unsigned int mp_log2(uint32_t v);
 uint32_t mp_round_next_power_of_2(uint32_t v);