win32: support taskbar button progress indicator

This adds support for the progress indicator taskbar extension
that was introduced with Windows 7 and Windows Server 2008 R2.

I don’t like this solution because it keeps its own state and
introduces another VOCTRL, but I couldn’t come up with anything
less messy.

closes #2399

3 files changed, 23 insertions, 0 deletions

diff --git a/player/core.h b/player/core.h
index 4303daa78a..abe1316b41 100644
--- a/player/core.h
+++ b/player/core.h
@@ -181,6 +181,7 @@ typedef struct MPContext {
     char *term_osd_subs;
     char *term_osd_contents;
     char *last_window_title;
+    struct voctrl_playback_state vo_playback_state;
 
     int add_osd_seek_info; // bitfield of enum mp_osd_seek_info
     double osd_visible; // for the osd bar only
@@ -462,6 +463,7 @@ double get_relative_time(struct MPContext *mpctx);
 void merge_playlist_files(struct playlist *pl);
 float mp_get_cache_percent(struct MPContext *mpctx);
 bool mp_get_cache_idle(struct MPContext *mpctx);
+void update_vo_playback_state(struct MPContext *mpctx);
 void update_window_title(struct MPContext *mpctx, bool force);
 void error_on_track(struct MPContext *mpctx, struct track *track);
 int stream_dump(struct MPContext *mpctx, const char *source_filename);
diff --git a/player/misc.c b/player/misc.c
index add73e5a17..1e67adbe32 100644
--- a/player/misc.c
+++ b/player/misc.c
@@ -153,6 +153,26 @@ bool mp_get_cache_idle(struct MPContext *mpctx)
     return idle;
 }
 
+void update_vo_playback_state(struct MPContext *mpctx)
+{
+    if (mpctx->video_out) {
+        struct voctrl_playback_state oldstate = mpctx->vo_playback_state;
+        struct voctrl_playback_state newstate = {
+            .paused = mpctx->paused,
+            .percent_pos = get_percent_pos(mpctx),
+        };
+
+        if (oldstate.paused != newstate.paused ||
+            oldstate.percent_pos != newstate.percent_pos) {
+            vo_control(mpctx->video_out,
+                       VOCTRL_UPDATE_PLAYBACK_STATE, &newstate);
+            mpctx->vo_playback_state = newstate;
+        }
+    } else {
+        mpctx->vo_playback_state = (struct voctrl_playback_state){ 0 };
+    }
+}
+
 void update_window_title(struct MPContext *mpctx, bool force)
 {
     if (!mpctx->video_out && !mpctx->ao) {
diff --git a/player/osd.c b/player/osd.c
index 596386ebae..cb49131cc1 100644
--- a/player/osd.c
+++ b/player/osd.c
@@ -164,6 +164,7 @@ static void print_status(struct MPContext *mpctx)
     struct MPOpts *opts = mpctx->opts;
 
     update_window_title(mpctx, false);
+    update_vo_playback_state(mpctx);
 
     if (!opts->use_terminal)
         return;