[vlc-devel] [PATCH 03/16] Add variable to enable/disable dual subtitles

[Roland Bewick]

---
 include/vlc_player.h                              | 33 +++++++++++++++++++++++
 modules/gui/macosx/playlist/VLCPlayerController.m |  1 +
 modules/gui/qt/components/player_controller.cpp   |  1 +
 src/input/player.c                                | 20 ++++++++++++++
 src/input/var.c                                   |  1 +
 src/libvlccore.sym                                |  2 ++
 6 files changed, 58 insertions(+)

diff --git a/include/vlc_player.h b/include/vlc_player.h
index f2df800797..aa0c736782 100644
--- a/include/vlc_player.h
+++ b/include/vlc_player.h
@@ -697,6 +697,18 @@ struct vlc_player_cbs
         float subs_fps, void *data);
 
     /**
+     * Called when dual subtitles enabled has changed
+     *
+     * @see vlc_player_SetDualSubtitlesEnabled()
+     *
+     * @param player locked player instance
+     * @param enabled true if dual subtitle selection is enabled
+     * @param data opaque pointer set by vlc_player_AddListener()
+     */
+    void (*on_dual_subtitles_enabled_changed)(vlc_player_t *player,
+        bool enabled, void *data);
+
+    /**
      * Called when a new renderer item is set
      *
      * @see vlc_player_SetRenderer()
@@ -2286,6 +2298,27 @@ VLC_API float
 vlc_player_GetAssociatedSubsFPS(vlc_player_t *player);
 
 /**
+ * Enable or disable the abiltity to select multiple subtitle tracks.
+ *
+ * @note A successful call will trigger the
+ * vlc_player_cbs.on_dual_subtitles_enabled_changed event.
+ *
+ * @param player locked player instance
+ * @param enabled Enable dual subtitle track selection
+ */
+VLC_API void
+vlc_player_SetDualSubtitlesEnabled(vlc_player_t *player, bool enabled);
+
+/**
+ * Get whether dual subtitles are enabled or not
+ *
+ * @param player locked player instance
+ * @return enabled
+ */
+VLC_API bool
+vlc_player_AreDualSubtitlesEnabled(vlc_player_t *player);
+
+/**
  * Set the renderer
  *
  * Valid for the current media and all future ones.
diff --git a/modules/gui/macosx/playlist/VLCPlayerController.m b/modules/gui/macosx/playlist/VLCPlayerController.m
index 463bee5946..d23770995f 100644
--- a/modules/gui/macosx/playlist/VLCPlayerController.m
+++ b/modules/gui/macosx/playlist/VLCPlayerController.m
@@ -462,6 +462,7 @@ static const struct vlc_player_cbs player_callbacks = {
     cb_player_audio_delay_changed,
     cb_player_subtitle_delay_changed,
     cb_player_associated_subs_fps_changed,
+    NULL, //cb_player_dual_subtitles_enabled_changed
     cb_player_renderer_changed,
     cb_player_record_changed,
     NULL, //cb_player_signal_changed,
diff --git a/modules/gui/qt/components/player_controller.cpp b/modules/gui/qt/components/player_controller.cpp
index e42f7b5b9d..994ba6dae4 100644
--- a/modules/gui/qt/components/player_controller.cpp
+++ b/modules/gui/qt/components/player_controller.cpp
@@ -818,6 +818,7 @@ static const struct vlc_player_cbs player_cbs = {
     on_player_audio_delay_changed,
     on_player_subtitle_delay_changed,
     on_player_associated_subs_fps_changed,
+    NULL, //on_player_dual_subtitles_enabled_changed,
     on_player_renderer_changed,
     on_player_record_changed,
     on_player_signal_changed,
diff --git a/src/input/player.c b/src/input/player.c
index 551b9928f1..66842997ac 100644
--- a/src/input/player.c
+++ b/src/input/player.c
@@ -2241,6 +2241,26 @@ vlc_player_GetAssociatedSubsFPS(vlc_player_t *player)
 }
 
 void
+vlc_player_SetDualSubtitlesEnabled(vlc_player_t *player, bool enabled)
+{
+    struct vlc_player_input *input = vlc_player_get_input_locked(player);
+    if (input)
+    {
+        var_SetBool(input->thread, "multiple-spus", enabled);
+        vlc_player_SendEvent(player, on_dual_subtitles_enabled_changed, enabled);
+        vlc_player_vout_OSDMessage(player, _("Dual subtitles %s"),
+                                   enabled ? _("enabled") : _("disabled"));
+    }
+}
+
+bool
+vlc_player_AreDualSubtitlesEnabled(vlc_player_t *player)
+{
+    struct vlc_player_input *input = vlc_player_get_input_locked(player);
+    return input && var_GetBool(input->thread, "multiple-spus");
+}
+
+void
 vlc_player_InvalidateNextMedia(vlc_player_t *player)
 {
     vlc_player_assert_locked(player);
diff --git a/src/input/var.c b/src/input/var.c
index 7822d66003..9110624eab 100644
--- a/src/input/var.c
+++ b/src/input/var.c
@@ -726,6 +726,7 @@ void input_ConfigVarInit ( input_thread_t *p_input )
         var_Create( p_input, "video", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
         var_Create( p_input, "audio", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
         var_Create( p_input, "spu", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
+        var_Create( p_input, "multiple-spus", VLC_VAR_BOOL);
 
         var_Create( p_input, "video-track", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
         var_Create( p_input, "audio-track", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
diff --git a/src/libvlccore.sym b/src/libvlccore.sym
index 03a503e1ea..887d45301e 100644
--- a/src/libvlccore.sym
+++ b/src/libvlccore.sym
@@ -868,6 +868,8 @@ vlc_player_SetStartPaused
 vlc_player_SetSubtitleDelay
 vlc_player_SetSubtitleSync
 vlc_player_SetSubtitleTextScale
+vlc_player_SetDualSubtitlesEnabled
+vlc_player_AreDualSubtitlesEnabled
 vlc_player_SetTeletextEnabled
 vlc_player_SetTeletextTransparency
 vlc_player_SetTrackCategoryEnabled
-- 
2.11.0