video: batch query_format calls

There are currently 568 pixel formats (actually fewer, but the namespace
is this big), and for each format elaborate synchronization was done to
call it synchronously on the VO. This is completely unnecessary, and we
can do with just a single call.

2 files changed, 8 insertions, 6 deletions

diff --git a/video/out/vo.c b/video/out/vo.c
index 82da6b5369..b7b017138d 100644
--- a/video/out/vo.c
+++ b/video/out/vo.c
@@ -782,15 +782,17 @@ static void run_query_format(void *p)
 {
     void **pp = p;
     struct vo *vo = pp[0];
-    *(int *)pp[2] = vo->driver->query_format(vo, *(int *)pp[1]);
+    uint8_t *list = pp[1];
+    for (int format = IMGFMT_START; format < IMGFMT_END; format++)
+        list[format - IMGFMT_START] = vo->driver->query_format(vo, format);
 }
 
-int vo_query_format(struct vo *vo, int format)
+// For each item in the list (allocated as uint8_t[IMGFMT_END - IMGFMT_START]),
+// set the supported format flags.
+void vo_query_formats(struct vo *vo, uint8_t *list)
 {
-    int ret;
-    void *p[] = {vo, &format, &ret};
+    void *p[] = {vo, list};
     mp_dispatch_run(vo->in->dispatch, run_query_format, p);
-    return ret;
 }
 
 // Calculate the appropriate source and destination rectangle to
diff --git a/video/out/vo.h b/video/out/vo.h
index 3d4d654738..383f47c7d7 100644
--- a/video/out/vo.h
+++ b/video/out/vo.h
@@ -319,7 +319,7 @@ void vo_seek_reset(struct vo *vo);
 void vo_destroy(struct vo *vo);
 void vo_set_paused(struct vo *vo, bool paused);
 int64_t vo_get_drop_count(struct vo *vo);
-int vo_query_format(struct vo *vo, int format);
+void vo_query_formats(struct vo *vo, uint8_t *list);
 void vo_event(struct vo *vo, int event);
 int vo_query_and_reset_events(struct vo *vo, int events);