Art: Do not crash if album is not null but empty

[vlc] / src / playlist / art.c

diff --git a/src/playlist/art.c b/src/playlist/art.c
index 83a401b784555b1634b8a3cd1a3b9ed4ad4a4ac0..97280e7c79b67863bb52d41736cff87dc5568fb7 100644 (file)
--- a/src/playlist/art.c
+++ b/src/playlist/art.c
@@ -33,6 +33,7 @@
 #include <vlc_strings.h>
 #include <vlc_stream.h>
 #include <vlc_url.h>
+#include <vlc_md5.h>
 
 #include <limits.h>                                             /* PATH_MAX */
 
@@ -63,7 +64,7 @@ static void ArtCacheCreateDir( const char *psz_dir )
     vlc_mkdir( psz_dir, 0700 );
 }
 
-static char* ArtCacheGetDirPath( const char *psz_title, const char *psz_artist,
+static char* ArtCacheGetDirPath( const char *psz_arturl, const char *psz_artist,
                                  const char *psz_album )
 {
     char *psz_dir;
@@ -71,8 +72,10 @@ static char* ArtCacheGetDirPath( const char *psz_title, const char *psz_artist,
 
     if( !EMPTY_STR(psz_artist) && !EMPTY_STR(psz_album) )
     {
-        char *psz_album_sanitized = filename_sanitize( psz_album );
-        char *psz_artist_sanitized = filename_sanitize( psz_artist );
+        char *psz_album_sanitized = strdup( psz_album );
+        filename_sanitize( psz_album_sanitized );
+        char *psz_artist_sanitized = strdup( psz_artist );
+        filename_sanitize( psz_artist_sanitized );
         if( asprintf( &psz_dir, "%s" DIR_SEP "art" DIR_SEP "artistalbum"
                       DIR_SEP "%s" DIR_SEP "%s", psz_cachedir,
                       psz_artist_sanitized, psz_album_sanitized ) == -1 )
@@ -82,11 +85,20 @@ static char* ArtCacheGetDirPath( const char *psz_title, const char *psz_artist,
     }
     else
     {
-        char * psz_title_sanitized = filename_sanitize( psz_title );
-        if( asprintf( &psz_dir, "%s" DIR_SEP "art" DIR_SEP "title" DIR_SEP
-                      "%s", psz_cachedir, psz_title_sanitized ) == -1 )
+        /* If artist or album missing cache by art download URL. The download
+           URL will be md5 hashed to form a valid cache filename. We assume that
+           psz_arturl is always the download URL and not the already hashed filename.
+           (We should never need to call this function if art has already been
+           downloaded anyway). */
+        struct md5_s md5;
+        InitMD5( &md5 );
+        AddMD5( &md5, psz_arturl, strlen( psz_arturl ) );
+        EndMD5( &md5 );
+        char * psz_arturl_sanitized = psz_md5_hash( &md5 );
+        if( asprintf( &psz_dir, "%s" DIR_SEP "art" DIR_SEP "arturl" DIR_SEP
+                      "%s", psz_cachedir, psz_arturl_sanitized ) == -1 )
             psz_dir = NULL;
-        free( psz_title_sanitized );
+        free( psz_arturl_sanitized );
     }
     free( psz_cachedir );
     return psz_dir;
@@ -97,7 +109,7 @@ static char *ArtCachePath( input_item_t *p_item )
     char* psz_path = NULL;
     const char *psz_artist;
     const char *psz_album;
-    const char *psz_title;
+    const char *psz_arturl;
 
     vlc_mutex_lock( &p_item->lock );
 
@@ -108,15 +120,12 @@ static char *ArtCachePath( input_item_t *p_item )
 
     psz_artist = vlc_meta_Get( p_item->p_meta, vlc_meta_Artist );
     psz_album = vlc_meta_Get( p_item->p_meta, vlc_meta_Album );
-    psz_title = vlc_meta_Get( p_item->p_meta, vlc_meta_Title );
+    psz_arturl = vlc_meta_Get( p_item->p_meta, vlc_meta_ArtworkURL );
 
-    if( !psz_title )
-        psz_title = p_item->psz_name;
-
-    if( (!psz_artist || !psz_album ) && !psz_title )
+    if( (EMPTY_STR(psz_artist) || EMPTY_STR(psz_album) ) && !psz_arturl )
         goto end;
 
-    psz_path = ArtCacheGetDirPath( psz_title, psz_artist, psz_album );
+    psz_path = ArtCacheGetDirPath( psz_arturl, psz_artist, psz_album );
 
 end:
     vlc_mutex_unlock( &p_item->lock );
@@ -131,7 +140,8 @@ static char *ArtCacheName( input_item_t *p_item, const char *psz_type )
 
     ArtCacheCreateDir( psz_path );
 
-    char *psz_ext = filename_sanitize( psz_type ? psz_type : "" );
+    char *psz_ext = strdup( psz_type ? psz_type : "" );
+    filename_sanitize( psz_ext );
     char *psz_filename;
     if( asprintf( &psz_filename, "%s" DIR_SEP "art%s", psz_path, psz_ext ) < 0 )
         psz_filename = NULL;
@@ -168,7 +178,7 @@ int playlist_FindArtInCache( input_item_t *p_item )
             if( asprintf( &psz_file, "%s" DIR_SEP "%s",
                           psz_path, psz_filename ) != -1 )
             {
-                char *psz_uri = make_URI( psz_file );
+                char *psz_uri = make_URI( psz_file, "file" );
                 if( psz_uri )
                 {
                     input_item_SetArtURL( p_item, psz_uri );
@@ -198,7 +208,7 @@ int playlist_SaveArt( playlist_t *p_playlist, input_item_t *p_item,
     if( !psz_filename )
         return VLC_EGENERIC;
 
-    char *psz_uri = make_URI( psz_filename );
+    char *psz_uri = make_URI( psz_filename, "file" );
     if( !psz_uri )
     {
         free( psz_filename );