Start on built-in LAME

Using LAME 3.10
Windows project files substantially changed from original, and included into audacity solution.

lib-src/libmp3lame/VbrTag.h

@@ -0,0 +1,79 @@
+/*
+ *      Xing VBR tagging for LAME.
+ *
+ *      Copyright (c) 1999 A.L. Faber
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef LAME_VRBTAG_H
+#define LAME_VRBTAG_H
+
+
+/* -----------------------------------------------------------
+ * A Vbr header may be present in the ancillary
+ * data field of the first frame of an mp3 bitstream
+ * The Vbr 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 NUMTOCENTRIES 100
+
+#ifndef lame_internal_flags_defined
+#define lame_internal_flags_defined
+struct lame_internal_flags;
+typedef struct lame_internal_flags lame_internal_flags;
+#endif
+
+
+/*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 Vbr header data */
+    int     frames;          /* total bit stream frames from Vbr header data */
+    int     bytes;           /* total bit stream bytes from Vbr header data */
+    int     vbr_scale;       /* encoded vbr scale from Vbr header data */
+    unsigned char toc[NUMTOCENTRIES]; /* may be NULL if toc not desired */
+    int     headersize;      /* size of VBR header, in bytes */
+    int     enc_delay;       /* encoder delay */
+    int     enc_padding;     /* encoder paddign added at end of stream */
+} VBRTAGDATA;
+
+int     GetVbrTag(VBRTAGDATA * pTagData, const unsigned char *buf);
+
+int     InitVbrTag(lame_global_flags * gfp);
+int     PutVbrTag(lame_global_flags const *gfp, FILE * fid);
+void    AddVbrFrame(lame_internal_flags * gfc);
+void    UpdateMusicCRC(uint16_t * crc, const unsigned char *buffer, int size);
+
+#endif