[vlc-commits] meta_engine: add ID3 tag to meta helper

[Francois Cartegnie]

vlc | branch: master | Francois Cartegnie <fcvlcdev at free.fr> | Sat Oct 15 22:08:12 2016 +0200| [d8b99984ca0c6e7e7b1ae9663604c6d461dccd79] | committer: Francois Cartegnie

meta_engine: add ID3 tag to meta helper

> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=d8b99984ca0c6e7e7b1ae9663604c6d461dccd79
---

 modules/meta_engine/ID3Meta.h | 143 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)

diff --git a/modules/meta_engine/ID3Meta.h b/modules/meta_engine/ID3Meta.h
new file mode 100644
index 0000000..b0f05ba
--- /dev/null
+++ b/modules/meta_engine/ID3Meta.h
@@ -0,0 +1,143 @@
+/*****************************************************************************
+ * ID3Meta.h : ID3v2 Meta Helper
+ *****************************************************************************
+ * Copyright (C) 2016 VLC authors and VideoLAN
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+#ifndef ID3META_H
+#define ID3META_H
+
+#include <vlc_meta.h>
+#include <vlc_charset.h>
+
+#define vlc_meta_extra vlc_meta_Title
+struct
+{
+    uint32_t i_tag;
+    vlc_meta_type_t type;
+    const char *psz;
+} const ID3_tag_to_metatype[] = {
+    { VLC_FOURCC('T', 'A', 'L', 'B'), vlc_meta_Album,       NULL },
+    { VLC_FOURCC('T', 'D', 'R', 'C'), vlc_meta_Date,        NULL },
+    { VLC_FOURCC('T', 'E', 'N', 'C'), vlc_meta_extra,       "Encoder" },
+    { VLC_FOURCC('T', 'I', 'T', '2'), vlc_meta_Title,       NULL },
+    { VLC_FOURCC('T', 'O', 'P', 'E'), vlc_meta_extra,       "Original Artist" },
+    { VLC_FOURCC('T', 'O', 'R', 'Y'), vlc_meta_extra,       "Original Release Year" },
+    { VLC_FOURCC('T', 'P', 'E', '1'), vlc_meta_Artist,      NULL },
+    { VLC_FOURCC('T', 'P', 'E', '2'), vlc_meta_AlbumArtist, NULL },
+    { VLC_FOURCC('T', 'R', 'S', 'N'), vlc_meta_Publisher,   NULL },
+    { VLC_FOURCC('T', 'R', 'S', 'O'), vlc_meta_extra,       "Radio Station Owner" },
+};
+#undef vlc_meta_extra
+
+static bool ID3TextTagHandler( const uint8_t *p_buf, size_t i_buf,
+                               vlc_meta_type_t type, const char *psz_extra,
+                               vlc_meta_t *p_meta, bool *pb_updated )
+{
+    char *p_alloc = NULL;
+    const char *psz;
+    if( i_buf > 3 && p_meta && p_buf[0] < 0x04 )
+    {
+        if( p_buf[ i_buf - 1 ] != 0x00 )
+            return false;
+
+        switch( p_buf[0] )
+        {
+            case 0x00:
+                psz = p_alloc = FromCharset( "ISO_8859-1", &p_buf[1], i_buf - 1 );
+                break;
+            case 0x01:
+                psz = p_alloc = FromCharset( "UTF-16LE", &p_buf[1], i_buf - 1 );
+                break;
+            case 0x02:
+                psz = p_alloc = FromCharset( "UTF-16BE", &p_buf[1], i_buf - 1 );
+                break;
+            default:
+            case 0x03:
+                psz = (const char *) &p_buf[1];
+                break;
+        }
+
+        if( psz && *psz )
+        {
+            const char *psz_old = ( psz_extra ) ? vlc_meta_GetExtra( p_meta, psz_extra ):
+                                                  vlc_meta_Get( p_meta, type );
+            if( !psz_old || strcmp( psz_old, psz ) )
+            {
+                if( pb_updated )
+                    *pb_updated = true;
+                if( psz_extra )
+                    vlc_meta_AddExtra( p_meta, psz_extra, psz );
+                else
+                    vlc_meta_Set( p_meta, type, psz );
+            }
+        }
+
+        free( p_alloc );
+        return true;
+    }
+    return false;
+}
+
+static bool ID3LinkFrameTagHandler( const uint8_t *p_buf, size_t i_buf,
+                                    vlc_meta_t *p_meta, bool *pb_updated )
+{
+    if( i_buf > 13 && p_meta )
+    {
+        const char *psz = (const char *)&p_buf[1];
+        size_t i_len = i_buf - 1;
+        size_t i_desclen = strnlen(psz, i_len);
+        if( i_desclen < i_len - 1 && i_desclen > 11 &&
+            !strncmp( "artworkURL_", psz, 11 ) )
+        {
+            const char *psz_old = vlc_meta_Get( p_meta, vlc_meta_ArtworkURL );
+            if( !psz_old || strncmp( psz_old, &psz[i_desclen], i_len - i_desclen ) )
+            {
+                char *p_alloc = strndup(&psz[i_desclen + 1], i_len - i_desclen - 1);
+                vlc_meta_Set( p_meta, vlc_meta_ArtworkURL, p_alloc );
+                free( p_alloc );
+                *pb_updated = true;
+            }
+        }
+        return true;
+    }
+    return false;
+}
+
+static bool ID3HandleTag( const uint8_t *p_buf, size_t i_buf,
+                          uint32_t i_tag,
+                          vlc_meta_t *p_meta, bool *pb_updated )
+{
+    if( ((const char *) &i_tag)[0] == 'T' )
+    {
+        for( size_t i=0; i<ARRAY_SIZE(ID3_tag_to_metatype); i++ )
+        {
+            if( ID3_tag_to_metatype[i].i_tag == i_tag )
+                return ID3TextTagHandler( p_buf, i_buf,
+                                          ID3_tag_to_metatype[i].type,
+                                          ID3_tag_to_metatype[i].psz,
+                                          p_meta, pb_updated );
+        }
+    }
+    else if( i_tag == VLC_FOURCC('W', 'X', 'X', 'X') )
+    {
+        return ID3LinkFrameTagHandler( p_buf, i_buf, p_meta, pb_updated );
+    }
+
+    return false;
+}
+
+#endif