split up the metadata parser

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13637 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 126 insertions, 0 deletions

diff --git a/apps/metadata/spc.c b/apps/metadata/spc.c
new file mode 100644
index 0000000..8d85518
--- /dev/null
+++ b/apps/metadata/spc.c
@@ -0,0 +1,126 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 Dave Chapman
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <inttypes.h>
+
+#include "system.h"
+#include "id3.h"
+#include "metadata_common.h"
+#include "debug.h"
+#include "atoi.h"
+#include "rbunicode.h"
+
+bool get_spc_metadata(int fd, struct mp3entry* id3)
+{
+    /* Use the trackname part of the id3 structure as a temporary buffer */
+    unsigned char * buf = (unsigned char *)id3->path;
+    int read_bytes;
+    char * p;
+    
+    unsigned long length;
+    unsigned long fade;
+    bool isbinary = true;
+    int i;
+    
+    /* try to get the ID666 tag */
+    if ((lseek(fd, 0x2e, SEEK_SET) < 0)
+        || ((read_bytes = read(fd, buf, 0xD2)) < 0xD2))
+    {
+        DEBUGF("lseek or read failed\n");
+        return false;
+    }
+
+    p = id3->id3v2buf;
+    
+    id3->title = p;
+    buf[31] = 0;
+    p = iso_decode(buf, p, 0, 32);
+    buf += 32;
+
+    id3->album = p;
+    buf[31] = 0;
+    p = iso_decode(buf, p, 0, 32);
+    buf += 48;
+    
+    id3->comment = p;
+    buf[31] = 0;
+    p = iso_decode(buf, p, 0, 32);
+    buf += 32;
+    
+    /* Date check */
+    if(buf[2] == '/' && buf[5] == '/')
+        isbinary = false;
+    
+    /* Reserved bytes check */
+    if(buf[0xD2 - 0x2E - 112] >= '0' &&
+       buf[0xD2 - 0x2E - 112] <= '9' &&
+       buf[0xD3 - 0x2E - 112] == 0x00)
+        isbinary = false;
+    
+    /* is length & fade only digits? */
+    for (i=0;i<8 && ( 
+        (buf[0xA9 - 0x2E - 112+i]>='0'&&buf[0xA9 - 0x2E - 112+i]<='9') ||
+        buf[0xA9 - 0x2E - 112+i]=='\0');
+        i++);
+    if (i==8) isbinary = false;
+    
+    if(isbinary) {
+        id3->year = buf[0] | (buf[1]<<8);
+        buf += 11;
+        
+        length = (buf[0] | (buf[1]<<8) | (buf[2]<<16)) * 1000;
+        buf += 3;
+        
+        fade = (buf[0] | (buf[1]<<8) | (buf[2]<<16) | (buf[3]<<24));
+        buf += 4;
+    } else {
+        char tbuf[6];
+        
+        buf += 6;
+        buf[4] = 0;
+        id3->year = atoi(buf);
+        buf += 5;
+        
+        memcpy(tbuf, buf, 3);
+        tbuf[3] = 0;
+        length = atoi(tbuf) * 1000;
+        buf += 3;
+        
+        memcpy(tbuf, buf, 5);
+        tbuf[5] = 0;
+        fade = atoi(tbuf);
+        buf += 5;
+    }
+    
+    id3->artist = p;
+    buf[31] = 0;
+    p = iso_decode(buf, p, 0, 32);
+    
+    if (length==0) {
+        length=3*60*1000; /* 3 minutes */
+        fade=5*1000; /* 5 seconds */
+    }
+    
+    id3->length = length+fade;
+
+    return true;
+}