libvlc: description and count of tracks, titles, chapters and subtitles

[vlc] / src / control / media_player.c

diff --git a/src/control/media_player.c b/src/control/media_player.c
index 7a36dd743d7ccc4e9f33e300cc3e2da9a42e49ba..14c5e29b049f44a8419f429e9c2f6753df9eb6a2 100644 (file)
--- a/src/control/media_player.c
+++ b/src/control/media_player.c
@@ -1117,6 +1117,78 @@ int libvlc_media_player_is_seekable( libvlc_media_player_t *p_mi,
     return val.b_bool;
 }
 
+/* internal function, used by audio, video */
+libvlc_track_description_t *
+        libvlc_get_track_description( libvlc_media_player_t *p_mi,
+                                      const char *psz_variable,
+                                      libvlc_exception_t *p_e )
+{
+    input_thread_t *p_input = libvlc_get_input_thread( p_mi, p_e );
+
+    if( !p_input )
+        return NULL;
+
+    vlc_value_t val_list, text_list;
+    var_Change( p_input, psz_variable, VLC_VAR_GETLIST, &val_list, &text_list);
+
+    if( val_list.p_list->i_count <= 0 ) /* no tracks */
+        return NULL;
+
+    libvlc_track_description_t *p_track_description, *p_actual, *p_previous;
+    p_track_description = ( libvlc_track_description_t * )
+        malloc( sizeof( libvlc_track_description_t ) );
+    if ( !p_track_description )
+    {
+        var_Change( p_input, psz_variable, VLC_VAR_FREELIST, &val_list, &text_list);
+        vlc_object_release( p_input );
+        libvlc_exception_raise( p_e, "no enough memory" );
+        return NULL;
+    }
+    p_actual = p_track_description;
+    p_previous = NULL;
+    for( int i = 0; i < val_list.p_list->i_count; i++ )
+    {
+        if( !p_actual )
+        {
+            p_actual = ( libvlc_track_description_t * )
+                malloc( sizeof( libvlc_track_description_t ) );
+            if ( !p_actual )
+            {
+                libvlc_track_description_release( p_track_description );
+                var_Change( p_input, psz_variable, VLC_VAR_FREELIST, &val_list, &text_list);
+                vlc_object_release( p_input );
+                libvlc_exception_raise( p_e, "no enough memory" );
+                return NULL;
+            }
+        }
+        p_actual->i_id = val_list.p_list->p_values[i].i_int;
+        p_actual->psz_name = strdup( text_list.p_list->p_values[i].psz_string );
+        p_actual->p_next = NULL;
+        if( p_previous )
+            p_previous->p_next = p_actual;
+        p_previous = p_actual;
+        p_actual =  NULL;
+    }
+    var_Change( p_input, psz_variable, VLC_VAR_FREELIST, &val_list, &text_list);
+    vlc_object_release( p_input );
+
+    return p_track_description;
+}
+
+void libvlc_track_description_release( libvlc_track_description_t *p_track_description )
+{
+    libvlc_track_description_t *p_actual, *p_before;
+    p_actual = p_track_description;
+
+    while ( p_actual )
+    {
+        free( p_actual->psz_name );
+        p_before = p_actual;
+        p_actual = p_before->p_next;
+        free( p_before );
+    }
+}
+
 int libvlc_media_player_can_pause( libvlc_media_player_t *p_mi,
                                      libvlc_exception_t *p_e )
 {