New ID3 and MP3 stream parser, plus not-yet-ready Xing header generation code

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3410 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 66 insertions, 0 deletions

diff --git a/firmware/export/mp3data.h b/firmware/export/mp3data.h
new file mode 100644
index 0000000000..a1018ebaa2
--- /dev/null
+++ b/firmware/export/mp3data.h
@@ -0,0 +1,66 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Linus Nielsen Feltzing
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+#ifndef _MP3DATA_H_
+#define _MP3DATA_H_
+
+#define MPEG_VERSION2_5 0
+#define MPEG_VERSION1   1
+#define MPEG_VERSION2   2
+
+struct mp3info {
+    /* Standard MP3 frame header fields */
+    int version;
+    int layer;
+    bool protection;
+    int bitrate;
+    int frequency;
+    int padding;
+    int channel_mode;
+    int mode_extension;
+    int emphasis;
+    int frame_size; /* Frame size in bytes */
+    int frame_time; /* Frame duration in milliseconds */
+
+    bool is_vbr;     /* True if the file is VBR */
+    bool has_toc;    /* True if there is a VBR header in the file */
+    bool is_xing_vbr; /* True if the VBR header is of Xing type */
+    bool is_vbri_vbr; /* True if the VBR header is of VBRI type */
+    unsigned char toc[100];
+    int frame_count; /* Number of frames in the file (if VBR) */
+    int byte_count;  /* File size in bytes */
+    int file_time;   /* Length of the whole file in milliseconds */
+    int xing_header_pos;
+};
+
+/* Xing header information */
+#define VBR_FRAMES_FLAG 0x01
+#define VBR_BYTES_FLAG  0x02
+#define VBR_TOC_FLAG    0x04
+
+
+unsigned long find_next_frame(int fd, int *offset, int max_offset, unsigned long last_header);
+int get_mp3file_info(int fd, struct mp3info *info);
+int count_mp3_frames(int fd, int startpos, int filesize,
+                     void (*progressfunc)(int));
+int create_xing_header(int fd, int startpos, int filesize,
+                       unsigned char *buf, int num_frames,
+                       void (*progressfunc)(int));
+
+#endif