[vlc-devel] [PATCH 01/15] Enable selection of secondary SPU ES in the core

Roland Bewick roland.bewick at gmail.com
Tue May 14 11:40:00 CEST 2019


---
 include/vlc_player.h       | 13 +++++++++++++
 src/input/es_out.c         | 47 ++++++++++++++++++++++++++++++++++++++++++++--
 src/input/es_out.h         |  5 ++++-
 src/input/input.c          |  5 +++++
 src/input/input_internal.h |  1 +
 src/input/player.c         | 11 +++++++++++
 src/libvlccore.sym         |  1 +
 7 files changed, 80 insertions(+), 3 deletions(-)

diff --git a/include/vlc_player.h b/include/vlc_player.h
index 1aa5f8e687..077b3883ad 100644
--- a/include/vlc_player.h
+++ b/include/vlc_player.h
@@ -2428,6 +2428,19 @@ VLC_API unsigned
 vlc_player_GetSubtitleTextScale(vlc_player_t *player);
 
 /**
+ * Allow secondary subtitle track(s) to be selected when
+ * the primary subtitle track is already selected.
+ *
+ * @note This must be returned to false immediately after
+ * selection of the subtitle.
+ *
+ * @param player locked player instance
+ * @param select true to allow selection of multiple subtitles
+ */
+VLC_API void
+vlc_player_SetSubtitleMultipleSelection(vlc_player_t *player, bool multiple);
+
+/**
  * Get the signal quality and strength of the current media
  *
  * @param player locked player instance
diff --git a/src/input/es_out.c b/src/input/es_out.c
index 2026fb8c22..73088c87d4 100644
--- a/src/input/es_out.c
+++ b/src/input/es_out.c
@@ -209,6 +209,9 @@ typedef struct
     /* Used only to limit debugging output */
     int         i_prev_stream_level;
 
+    /* Used to temporarily allow subtitle selection of multiple sub tracks */
+    bool        b_multiple_subtitle_selection;
+
     es_out_t out;
 } es_out_sys_t;
 
@@ -2037,6 +2040,24 @@ static void EsOutUnselectEs( es_out_t *out, es_out_id_t *es, bool b_update )
 }
 
 /**
+ * Count the number of selected ES of the given category
+ * \param i_cat the ES category (e.g. SPU_ES)
+ * \return count
+ */
+static int EsOutCountSelected( es_out_sys_t *p_sys,
+                               enum es_format_category_e i_cat )
+{
+    int i_selected_count = 0;
+    es_out_id_t *other;
+    foreach_es_then_es_slaves(other)
+        if( other->fmt.i_cat == i_cat && EsIsSelected( other ) )
+        {
+            ++i_selected_count;
+        }
+    return i_selected_count;
+}
+
+/**
  * Select an ES given the current mode
  * XXX: you need to take a the lock before (stream.stream_lock)
  *
@@ -2056,9 +2077,24 @@ static void EsOutSelect( es_out_t *out, es_out_id_t *es, bool b_force )
         return;
     }
 
+    /* Select secondary if the user has already selected a primary sub track */
+    bool b_select_secondary_subtitle = es->fmt.i_cat == SPU_ES &&
+                               p_sys->b_multiple_subtitle_selection &&
+                               p_esprops->p_main_es != NULL &&
+                               EsIsSelected(p_esprops->p_main_es);
+
+    if ( b_select_secondary_subtitle &&
+         EsOutCountSelected( p_sys, es->fmt.i_cat ) > 1 )
+    {
+        /* Don't allow more than one secondary SPU ES selected at a time. */
+        EsOutSendEsEvent(out, es, VLC_INPUT_ES_UNSELECTED);
+        return;
+    }
+
     bool b_auto_unselect = p_esprops && p_sys->i_mode == ES_OUT_MODE_AUTO &&
                            p_esprops->e_policy == ES_OUT_ES_POLICY_EXCLUSIVE &&
-                           p_esprops->p_main_es && p_esprops->p_main_es != es;
+                           p_esprops->p_main_es && p_esprops->p_main_es != es &&
+                           !b_select_secondary_subtitle;
 
     if( p_sys->i_mode == ES_OUT_MODE_ALL || b_force )
     {
@@ -2178,7 +2214,8 @@ static void EsOutSelect( es_out_t *out, es_out_id_t *es, bool b_force )
     }
 
     /* FIXME TODO handle priority here */
-    if( p_esprops && p_sys->i_mode == ES_OUT_MODE_AUTO && EsIsSelected( es ) )
+    if( p_esprops && p_sys->i_mode == ES_OUT_MODE_AUTO && EsIsSelected( es ) &&
+        !b_select_secondary_subtitle )
         p_esprops->p_main_es = es;
 }
 
@@ -3187,6 +3224,12 @@ static int EsOutVaControlLocked( es_out_t *out, int i_query, va_list args )
         }
         return ret;
     }
+    case ES_OUT_SET_MULTIPLE_SUBTITLE_SELECTION:
+    {
+        es_out_sys_t *p_sys = container_of(out, es_out_sys_t, out);
+        p_sys->b_multiple_subtitle_selection = va_arg( args, int );
+        return VLC_SUCCESS;
+    }
     default:
         msg_Err( p_sys->p_input, "unknown query 0x%x in %s", i_query,
                  __func__  );
diff --git a/src/input/es_out.h b/src/input/es_out.h
index 7cbea71728..3788e69dfb 100644
--- a/src/input/es_out.h
+++ b/src/input/es_out.h
@@ -89,7 +89,10 @@ enum es_out_query_private_e
     ES_OUT_SET_VBI_PAGE,                            /* arg1=unsigned res=can fail */
 
     /* Set VBI/Teletext menu transparent */
-    ES_OUT_SET_VBI_TRANSPARENCY                     /* arg1=bool res=can fail */
+    ES_OUT_SET_VBI_TRANSPARENCY,                    /* arg1=bool res=can fail */
+
+    /* Allow selection of a secondary SPU ES if primary is already selected */
+    ES_OUT_SET_MULTIPLE_SUBTITLE_SELECTION,         /* arg1=bool res=cannot fail */
 };
 
 static inline void es_out_SetMode( es_out_t *p_out, int i_mode )
diff --git a/src/input/input.c b/src/input/input.c
index 381b85a9fd..821a18ff2c 100644
--- a/src/input/input.c
+++ b/src/input/input.c
@@ -2396,6 +2396,11 @@ static bool Control( input_thread_t *p_input,
                             param.vbi_transparency.id,
                             param.vbi_transparency.enabled );
             break;
+        case INPUT_CONTROL_SET_MULTIPLE_SUBTITLE_SELECTION:
+             es_out_Control( priv->p_es_out_display,
+                             ES_OUT_SET_MULTIPLE_SUBTITLE_SELECTION,
+                             param.val.b_bool );
+             break;
 
         case INPUT_CONTROL_NAV_ACTIVATE:
         case INPUT_CONTROL_NAV_UP:
diff --git a/src/input/input_internal.h b/src/input/input_internal.h
index 18495881c2..914cebe7d4 100644
--- a/src/input/input_internal.h
+++ b/src/input/input_internal.h
@@ -268,6 +268,7 @@ enum input_control_e
 
     INPUT_CONTROL_SET_VBI_PAGE,
     INPUT_CONTROL_SET_VBI_TRANSPARENCY,
+    INPUT_CONTROL_SET_MULTIPLE_SUBTITLE_SELECTION,
 };
 
 /* Internal helpers */
diff --git a/src/input/player.c b/src/input/player.c
index da02375a66..843f86000c 100644
--- a/src/input/player.c
+++ b/src/input/player.c
@@ -2888,6 +2888,17 @@ vlc_player_SetSubtitleSync(vlc_player_t *player,
     }
 }
 
+void
+vlc_player_SetSubtitleMultipleSelection(vlc_player_t *player, bool multiple)
+{
+    struct vlc_player_input *input = vlc_player_get_input_locked(player);
+    if (!input)
+        return;
+    input_ControlPushHelper(input->thread,
+                            INPUT_CONTROL_SET_MULTIPLE_SUBTITLE_SELECTION,
+                            &(vlc_value_t){ .b_bool = multiple });
+}
+
 vlc_tick_t
 vlc_player_GetSubtitleDelay(vlc_player_t *player)
 {
diff --git a/src/libvlccore.sym b/src/libvlccore.sym
index 1cbbfe72f6..d0070d42b8 100644
--- a/src/libvlccore.sym
+++ b/src/libvlccore.sym
@@ -868,6 +868,7 @@ vlc_player_SetStartPaused
 vlc_player_SetSubtitleDelay
 vlc_player_SetSubtitleSync
 vlc_player_SetSubtitleTextScale
+vlc_player_SetSubtitleMultipleSelection
 vlc_player_SetTeletextEnabled
 vlc_player_SetTeletextTransparency
 vlc_player_SetTrackCategoryEnabled
-- 
2.11.0



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