Christian Schmiljun / mp3tag

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API Documentation at this revision

Revision 2:f07a503ce8fe, committed 2011-01-26

Comitter:
christi_s
Date:
Wed Jan 26 17:53:29 2011 +0000
Parent:
1:432c333ddb3a
Commit message:
add \"bool mp3tag_readTagFF(FIL* openFile, Id3V1Tag* tag)\"

Changed in this revision

mp3tag.cpp Show annotated file Show diff for this revision Revisions of this file
mp3tag.h Show annotated file Show diff for this revision Revisions of this file 
--- a/mp3tag.cpp	Tue Jan 25 22:34:05 2011 +0000
+++ b/mp3tag.cpp	Wed Jan 26 17:53:29 2011 +0000
@@ -92,6 +92,38 @@
     return true;
 }
 
+bool mp3tag_readTagFF(FIL* openFile, Id3V1Tag* tag)
+{
+    if (!openFile) 
+    {
+        DEBUGOUT("MP3Tag: File not open.\r\n");
+        return false;
+    }
+    // backup stream position
+    DWORD pos = openFile->fptr;        
+    unsigned int n;
+    if (   (f_lseek(openFile, openFile->fsize - 128) != FR_OK) 
+        || (f_read(openFile, tag, 128, &n) != FR_OK)
+        || n != 128)
+    {
+        DEBUGOUT("MP3Tag: Couldn't jump/read in file.\r\n");
+        // restore stream position
+        f_lseek(openFile, pos);
+        return false;
+    }        
+    
+    // restore stream position
+    f_lseek(openFile, pos);
+    if (strncmp(tag->tag, "TAG", 3)) 
+    {
+        DEBUGOUT("MP3Tag: File doesn't have an ID3 tag.\r\n");
+        return false;
+    }
+    DEBUGOUT("MP3Tag: GenreID %i.\r\n", tag->genre); 
+    DEBUGOUT("MP3Tag: Tags readed.\r\n");
+    return true;
+}
+
 char mp3tag_getTrackNumber(Id3V1Tag* tag)
 {
     if (tag->comment[28] == 0x00 &&  tag->comment[29] != 0x00)

--- a/mp3tag.h	Tue Jan 25 22:34:05 2011 +0000
+++ b/mp3tag.h	Wed Jan 26 17:53:29 2011 +0000
@@ -28,6 +28,7 @@
 #include <string.h>
 
 #include "defines.h"
+#include "ff.h"
 
 #define MP3_ID3_TITLE_LENGTH        30
 #define MP3_ID3_ARTIST_LENGTH       30
@@ -73,6 +74,18 @@
  */
 bool mp3tag_readTag(FILE* openFile, Id3V1Tag* tag);
 
+/** Read id3tag from a file.
+ * 
+ * @param openFile
+ *   Open/readable audio file. (mp3)
+ *
+ * @param tag
+ *   Return value with id3tag.
+ *  
+ * @return TRUE on success, tag has the informations; FALSE on failure, tag isn't modiefied, openFile isn't open/readable or file has no id3v1. 
+ */
+bool mp3tag_readTagFF(FIL* openFile, Id3V1Tag* tag);
+
 /** Get track number from an id3tag.
  * 
  * @param tag