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+/***************************************************************************
+
+ vbiparse.h
+
+ Parse Philips codes and other data from VBI lines.
+
+****************************************************************************
+
+ Copyright Aaron Giles
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the
+ distribution.
+ * Neither the name 'MAME' nor the names of its contributors may be
+ used to endorse or promote products derived from this software
+ without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
+ IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
+ INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ POSSIBILITY OF SUCH DAMAGE.
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __VBIPARSE_H__
+#define __VBIPARSE_H__
+
+
+/***************************************************************************
+ CONSTANTS
+***************************************************************************/
+
+/* size of packed VBI data */
+#define VBI_PACKED_BYTES 16
+
+/* these codes are full 24-bit codes with no parameter data */
+#define VBI_CODE_LEADIN 0x88ffff
+#define VBI_CODE_LEADOUT 0x80eeee
+#define VBI_CODE_STOP 0x82cfff
+#define VBI_CODE_CLV 0x87ffff
+
+/* these codes require a mask because some bits are parameters */
+#define VBI_MASK_CAV_PICTURE 0xf00000
+#define VBI_CODE_CAV_PICTURE 0xf00000
+#define VBI_MASK_CHAPTER 0xf00fff
+#define VBI_CODE_CHAPTER 0x800ddd
+#define VBI_MASK_CLV_TIME 0xf0ff00
+#define VBI_CODE_CLV_TIME 0xf0dd00
+#define VBI_MASK_STATUS_CX_ON 0xfff000
+#define VBI_CODE_STATUS_CX_ON 0x8dc000
+#define VBI_MASK_STATUS_CX_OFF 0xfff000
+#define VBI_CODE_STATUS_CX_OFF 0x8bc000
+#define VBI_MASK_USER 0xf0f000
+#define VBI_CODE_USER 0x80d000
+#define VBI_MASK_CLV_PICTURE 0xf0f000
+#define VBI_CODE_CLV_PICTURE 0x80e000
+
+
+
+/***************************************************************************
+ MACROS
+***************************************************************************/
+
+#define VBI_CAV_PICTURE(x) (((((x) >> 16) & 0x07) * 10000) + ((((x) >> 12) & 0x0f) * 1000) + ((((x) >> 8) & 0x0f) * 100) + ((((x) >> 4) & 0x0f) * 10) + ((((x) >> 0) & 0x0f) * 1))
+#define VBI_CHAPTER(x) (((((x) >> 16) & 0x07) * 10) + ((((x) >> 12) & 0x0f) * 1))
+
+
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+typedef struct _vbi_metadata vbi_metadata;
+struct _vbi_metadata
+{
+ UINT8 white; /* white flag: on or off */
+ UINT32 line16; /* line 16 code */
+ UINT32 line17; /* line 17 code */
+ UINT32 line18; /* line 18 code */
+ UINT32 line1718; /* most plausible value from lines 17/18 */
+};
+
+
+
+/***************************************************************************
+ FUNCTION PROTOTYPES
+***************************************************************************/
+
+/* parse a Manchester code from a line of video data */
+int vbi_parse_manchester_code(const UINT16 *source, int sourcewidth, int sourceshift, int expectedbits, UINT32 *result);
+
+/* compute the "white flag" from a line of video data */
+int vbi_parse_white_flag(const UINT16 *source, int sourcewidth, int sourceshift);
+
+/* parse everything from a video frame */
+void vbi_parse_all(const UINT16 *source, int sourcerowpixels, int sourcewidth, int sourceshift, vbi_metadata *vbi);
+
+/* pack the VBI data down into a smaller form for storage */
+void vbi_metadata_pack(UINT8 *dest, UINT32 framenum, const vbi_metadata *vbi);
+
+/* unpack the VBI data from a smaller form into the full structure */
+void vbi_metadata_unpack(vbi_metadata *vbi, UINT32 *framenum, const UINT8 *source);
+
+
+#endif /* __VBIPARSE_H__ */