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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commite2de64d6f1beb9e492daf5b886e19933c1fa41dd (patch)
tree9047cf9e6b5c43878d5bf82660adae77ceee097a /mpg123_artsplugin/dxhead.h
downloadtdemultimedia-e2de64d6f1beb9e492daf5b886e19933c1fa41dd.tar.gz
tdemultimedia-e2de64d6f1beb9e492daf5b886e19933c1fa41dd.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
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diff --git a/mpg123_artsplugin/dxhead.h b/mpg123_artsplugin/dxhead.h
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+/*---- DXhead.h --------------------------------------------
+
+
+decoder MPEG Layer III
+
+handle Xing header
+
+
+Copyright 1998 Xing Technology Corp.
+-----------------------------------------------------------*/
+/* A Xing header may be present in the ancillary
+ * data field of the first frame of an mp3 bitstream
+ * The Xing header (optionally) contains
+ * frames total number of audio frames in the bitstream
+ * bytes total number of bytes in the bitstream
+ * toc table of contents
+
+ * toc (table of contents) gives seek points
+ * for random access
+ * the ith entry determines the seek point for
+ * i-percent duration
+ * seek point in bytes = (toc[i]/256.0) * total_bitstream_bytes
+ * e.g. half duration seek point = (toc[50]/256.0) * total_bitstream_bytes
+ */
+
+#define FRAMES_FLAG 0x0001
+#define BYTES_FLAG 0x0002
+#define TOC_FLAG 0x0004
+#define VBR_SCALE_FLAG 0x0008
+
+#define FRAMES_AND_BYTES (FRAMES_FLAG | BYTES_FLAG)
+
+/* structure to receive extracted header
+ * toc may be NULL
+ */
+typedef struct
+{
+
+ int h_id; /* from MPEG header, 0=MPEG2, 1=MPEG1 */
+
+ int samprate; /* determined from MPEG header */
+
+ int flags; /* from Xing header data */
+
+ int frames; /* total bit stream frames from Xing header data */
+
+ int bytes; /* total bit stream bytes from Xing header data */
+
+ int vbr_scale; /* encoded vbr scale from Xing header data */
+
+ unsigned char *toc; /* pointer to unsigned char toc_buffer[100] */
+
+ /* may be NULL if toc not desired */
+}
+XHEADDATA;
+
+
+
+int mpg123_get_xing_header(XHEADDATA * X, unsigned char *buf);
+
+/* return 0=fail, 1=success
+ * X structure to receive header data (output)
+ * buf bitstream input
+ */
+
+int mpg123_seek_point(unsigned char TOC[100], int file_bytes, float percent);
+
+/* return seekpoint in bytes (may be at eof if percent=100.0)
+ * TOC = table of contents from Xing header
+ * file_bytes = number of bytes in mp3 file
+ * percent = play time percentage of total playtime. May be
+ * fractional (e.g. 87.245)
+ */
+int mpg123_stream_check_for_xing_header(struct frame *fr, XHEADDATA * xhead);
+
+
+