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423 lines
15 KiB
C
423 lines
15 KiB
C
/*
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* libzvbi -- Old raw VBI decoder
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*
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* Copyright (C) 2000, 2001, 2002 Michael H. Schimek
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*/
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/* $Id: decoder.h,v 1.11 2008-02-19 00:35:15 mschimek Exp $ */
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#ifndef DECODER_H
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#define DECODER_H
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "bcd.h"
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#include "sliced.h"
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/* Public */
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#include <glib.h>
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/* Bit slicer */
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/**
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* @ingroup Rawdec
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* @brief Image format used as source to vbi_bit_slice() and vbi_raw_decode().
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*
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* @htmlonly
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<table border=1>
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<tr><th>Symbol</th><th>Byte 0</th><th>Byte 1</th><th>Byte 2</th><th>Byte 3</th></tr>
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<tr><td colspan=5>Planar YUV 4:2:0 data.</td></tr>
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<tr><td>VBI_PIXFMT_YUV420</td><td colspan=4>
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<table>
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<tr><th>Y plane</th><th>U plane</th><th>V plane</th></tr>
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<tr><td><table border=1>
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<tr><td>Y00</td><td>Y01</td><td>Y02</td><td>Y03</td></tr>
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<tr><td>Y10</td><td>Y11</td><td>Y12</td><td>Y13</td></tr>
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<tr><td>Y20</td><td>Y21</td><td>Y22</td><td>Y23</td></tr>
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<tr><td>Y30</td><td>Y31</td><td>Y32</td><td>Y33</td></tr>
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</table></td>
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<td><table border=1>
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<tr><td>Cb00</td><td>Cb01</td></tr>
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<tr><td>Cb10</td><td>Cb11</td></tr>
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</table></td>
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<td><table border=1>
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<tr><td>Cr00</td><td>Cr01</td></tr>
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<tr><td>Cr10</td><td>Cr11</td></tr>
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</table></td>
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</tr></table></td>
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</tr>
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<tr><td colspan=5>Packed YUV 4:2:2 data.</td></tr>
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<tr><td>VBI_PIXFMT_YUYV</td><td>Y0</td><td>Cb</td><td>Y1</td><td>Cr</td></tr>
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<tr><td>VBI_PIXFMT_YVYU</td><td>Y0</td><td>Cr</td><td>Y1</td><td>Cb</td></tr>
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<tr><td>VBI_PIXFMT_UYVY</td><td>Cb</td><td>Y0</td><td>Cr</td><td>Y1</td></tr>
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<tr><td>VBI_PIXFMT_VYUY</td><td>Cr</td><td>Y0</td><td>Cb</td><td>Y1</td></tr>
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<tr><td colspan=5>Packed 32 bit RGB data.</td></tr>
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<tr><td>VBI_PIXFMT_RGBA32_LE VBI_PIXFMT_ARGB32_BE</td>
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<td>r7 ... r0</td><td>g7 ... g0</td>
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<td>b7 ... b0</td><td>a7 ... a0</td></tr>
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<tr><td>VBI_PIXFMT_BGRA32_LE VBI_PIXFMT_ARGB32_BE</td>
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<td>b7 ... b0</td><td>g7 ... g0</td>
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<td>r7 ... r0</td><td>a7 ... a0</td></tr>
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<tr><td>VBI_PIXFMT_ARGB32_LE VBI_PIXFMT_BGRA32_BE</td>
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<td>a7 ... a0</td><td>r7 ... r0</td>
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<td>g7 ... g0</td><td>b7 ... b0</td></tr>
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<tr><td>VBI_PIXFMT_ABGR32_LE VBI_PIXFMT_RGBA32_BE</td>
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<td>a7 ... a0</td><td>b7 ... b0</td>
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<td>g7 ... g0</td><td>r7 ... r0</td></tr>
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<tr><td colspan=5>Packed 24 bit RGB data.</td></tr>
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<tr><td>VBI_PIXFMT_RGBA24</td>
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<td>r7 ... r0</td><td>g7 ... g0</td>
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<td>b7 ... b0</td><td> </td></tr>
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<tr><td>VBI_PIXFMT_BGRA24</td>
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<td>b7 ... b0</td><td>g7 ... g0</td>
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<td>r7 ... r0</td><td> </td></tr>
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<tr><td colspan=5>Packed 16 bit RGB data.</td></tr>
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<tr><td>VBI_PIXFMT_RGB16_LE</td>
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<td>g2 g1 g0 r4 r3 r2 r1 r0</td>
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<td>b4 b3 b2 b1 b0 g5 g4 g3</td>
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<td> </td><td> </td></tr><tr><td>VBI_PIXFMT_BGR16_LE</td>
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<td>g2 g1 g0 b4 b3 b2 b1 b0</td>
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<td>r4 r3 r2 r1 r0 g5 g4 g3</td>
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<td> </td><td> </td></tr><tr><td>VBI_PIXFMT_RGB16_BE</td>
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<td>b4 b3 b2 b1 b0 g5 g4 g3</td>
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<td>g2 g1 g0 r4 r3 r2 r1 r0</td>
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<td> </td><td> </td></tr><tr><td>VBI_PIXFMT_BGR16_BE</td>
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<td>r4 r3 r2 r1 r0 g5 g4 g3</td>
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<td>g2 g1 g0 b4 b3 b2 b1 b0</td>
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<td> </td><td> </td></tr>
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<tr><td colspan=5>Packed 15 bit RGB data.</td></tr>
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<tr><td>VBI_PIXFMT_RGBA15_LE</td>
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<td>g2 g1 g0 r4 r3 r2 r1 r0</td>
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<td>a0 b4 b3 b2 b1 b0 g4 g3</td>
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<td> </td><td> </td></tr><tr><td>VBI_PIXFMT_BGRA15_LE</td>
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<td>g2 g1 g0 b4 b3 b2 b1 b0</td>
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<td>a0 r4 r3 r2 r1 r0 g4 g3</td>
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<td> </td><td> </td></tr><tr><td>VBI_PIXFMT_ARGB15_LE</td>
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<td>g1 g0 r4 r3 r2 r1 r0 a0</td>
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<td>b4 b3 b2 b1 b0 g4 g3 g2</td>
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<td> </td><td> </td></tr><tr><td>VBI_PIXFMT_ABGR15_LE</td>
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<td>g1 g0 b4 b3 b2 b1 b0 a0</td>
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<td>r4 r3 r2 r1 r0 g4 g3 g2</td>
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<td> </td><td> </td></tr><tr><td>VBI_PIXFMT_RGBA15_BE</td>
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<td>a0 b4 b3 b2 b1 b0 g4 g3</td>
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<td>g2 g1 g0 r4 r3 r2 r1 r0</td>
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<td> </td><td> </td></tr><tr><td>VBI_PIXFMT_BGRA15_BE</td>
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<td>a0 r4 r3 r2 r1 r0 g4 g3</td>
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<td>g2 g1 g0 b4 b3 b2 b1 b0</td>
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<td> </td><td> </td></tr><tr><td>VBI_PIXFMT_ARGB15_BE</td>
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<td>b4 b3 b2 b1 b0 g4 g3 g2</td>
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<td>g1 g0 r4 r3 r2 r1 r0 a0</td>
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<td> </td><td> </td></tr><tr><td>VBI_PIXFMT_ABGR15_BE</td>
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<td>r4 r3 r2 r1 r0 g4 g3 g2</td>
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<td>g1 g0 b4 b3 b2 b1 b0 a0</td>
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<td> </td><td> </td></tr>
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</table>
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@endhtmlonly */
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/* Attn: keep this in sync with rte, don't change order */
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typedef enum {
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VBI_PIXFMT_YUV420 = 1,
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VBI_PIXFMT_YUYV,
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VBI_PIXFMT_YVYU,
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VBI_PIXFMT_UYVY,
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VBI_PIXFMT_VYUY,
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VBI_PIXFMT_PAL8,
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VBI_PIXFMT_RGBA32_LE = 32,
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VBI_PIXFMT_RGBA32_BE,
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VBI_PIXFMT_BGRA32_LE,
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VBI_PIXFMT_BGRA32_BE,
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VBI_PIXFMT_ABGR32_BE = 32, /* synonyms */
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VBI_PIXFMT_ABGR32_LE,
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VBI_PIXFMT_ARGB32_BE,
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VBI_PIXFMT_ARGB32_LE,
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VBI_PIXFMT_RGB24,
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VBI_PIXFMT_BGR24,
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VBI_PIXFMT_RGB16_LE,
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VBI_PIXFMT_RGB16_BE,
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VBI_PIXFMT_BGR16_LE,
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VBI_PIXFMT_BGR16_BE,
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VBI_PIXFMT_RGBA15_LE,
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VBI_PIXFMT_RGBA15_BE,
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VBI_PIXFMT_BGRA15_LE,
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VBI_PIXFMT_BGRA15_BE,
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VBI_PIXFMT_ARGB15_LE,
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VBI_PIXFMT_ARGB15_BE,
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VBI_PIXFMT_ABGR15_LE,
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VBI_PIXFMT_ABGR15_BE
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} vbi_pixfmt;
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/* Private */
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typedef uint64_t vbi_pixfmt_set;
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#define VBI_MAX_PIXFMTS 64
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#define VBI_PIXFMT_SET(pixfmt) (((vbi_pixfmt_set) 1) << (pixfmt))
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#define VBI_PIXFMT_SET_YUV (VBI_PIXFMT_SET (VBI_PIXFMT_YUV420) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_YUYV) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_YVYU) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_UYVY) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_VYUY))
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#define VBI_PIXFMT_SET_RGB (VBI_PIXFMT_SET (VBI_PIXFMT_RGBA32_LE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_RGBA32_BE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_BGRA32_LE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_BGRA32_BE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_RGB24) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_BGR24) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_RGB16_LE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_RGB16_BE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_BGR16_LE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_BGR16_BE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_RGBA15_LE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_RGBA15_BE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_BGRA15_LE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_BGRA15_BE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_ARGB15_LE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_ARGB15_BE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_ABGR15_LE) | \
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VBI_PIXFMT_SET (VBI_PIXFMT_ABGR15_BE))
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#define VBI_PIXFMT_SET_ALL (VBI_PIXFMT_SET_YUV | \
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VBI_PIXFMT_SET_RGB)
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#define VBI_PIXFMT_BPP(fmt) \
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(((fmt) == VBI_PIXFMT_YUV420) ? 1 : \
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(((fmt) >= VBI_PIXFMT_RGBA32_LE \
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&& (fmt) <= VBI_PIXFMT_BGRA32_BE) ? 4 : \
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(((fmt) == VBI_PIXFMT_RGB24 \
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|| (fmt) == VBI_PIXFMT_BGR24) ? 3 : 2)))
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/* Public */
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/**
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* @ingroup Rawdec
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* @brief Modulation used for VBI data transmission.
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*/
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typedef enum {
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/**
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* The data is 'non-return to zero' coded, logical '1' bits
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* are described by high sample values, logical '0' bits by
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* low values. The data is last significant bit first transmitted.
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*/
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VBI_MODULATION_NRZ_LSB,
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/**
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* 'Non-return to zero' coded, most significant bit first
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* transmitted.
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*/
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VBI_MODULATION_NRZ_MSB,
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/**
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* The data is 'bi-phase' coded. Each data bit is described
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* by two complementary signalling elements, a logical '1'
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* by a sequence of '10' elements, a logical '0' by a '01'
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* sequence. The data is last significant bit first transmitted.
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*/
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VBI_MODULATION_BIPHASE_LSB,
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/**
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* 'Bi-phase' coded, most significant bit first transmitted.
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*/
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VBI_MODULATION_BIPHASE_MSB
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} vbi_modulation;
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#if 0
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/**
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* @ingroup Rawdec
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* @brief Bit slicer context.
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*
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* The contents of this structure are private,
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* use vbi_bit_slicer_init() to initialize.
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*/
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typedef struct vbi_bit_slicer {
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vbi_bool (* func)(struct vbi_bit_slicer *slicer,
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uint8_t *raw, uint8_t *buf);
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unsigned int cri;
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unsigned int cri_mask;
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int thresh;
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int cri_bytes;
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int cri_rate;
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int oversampling_rate;
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int phase_shift;
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int step;
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unsigned int frc;
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int frc_bits;
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int payload;
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int endian;
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int skip;
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} vbi_bit_slicer;
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/**
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* @addtogroup Rawdec
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* @{
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*/
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extern void vbi_bit_slicer_init(vbi_bit_slicer *slicer,
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int raw_samples, int sampling_rate,
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int cri_rate, int bit_rate,
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unsigned int cri_frc, unsigned int cri_mask,
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int cri_bits, int frc_bits, int payload,
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vbi_modulation modulation, vbi_pixfmt fmt);
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/**
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* @param slicer Pointer to initialized vbi_bit_slicer object.
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* @param raw Input data. At least the number of pixels or samples
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* given as @a raw_samples to vbi_bit_slicer_init().
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* @param buf Output data. The buffer must be large enough to store
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* the number of bits given as @a payload to vbi_bit_slicer_init().
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*
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* Decode one scan line of raw vbi data. Note the bit slicer tries
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* to adapt to the average signal amplitude, you should avoid
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* using the same vbi_bit_slicer object for data from different
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* devices.
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*
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* @note As a matter of speed this function does not lock the
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* @a slicer. When you want to share a vbi_bit_slicer object between
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* multiple threads you must implement your own locking mechanism.
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*
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* @return
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* @c FALSE if the raw data does not contain the expected
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* information, i. e. the CRI/FRC has not been found. This may also
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* result from a too weak or noisy signal. Error correction must be
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* implemented at a higher layer.
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*/
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_vbi_inline vbi_bool
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vbi_bit_slice(vbi_bit_slicer *slicer, uint8_t *raw, uint8_t *buf)
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{
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return slicer->func(slicer, raw, buf);
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}
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/** @} */
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#endif
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/**
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* @ingroup Rawdec
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* @brief Raw vbi decoder context.
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*
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* Only the sampling parameters are public. See
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* vbi_raw_decoder_parameters() and vbi_raw_decoder_add_services()
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* for usage.
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*/
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typedef struct vbi_raw_decoder {
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/* Sampling parameters */
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/**
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* Either 525 (M/NTSC, M/PAL) or 625 (PAL, SECAM), describing the
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* scan line system all line numbers refer to.
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*/
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int scanning;
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/**
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* Format of the raw vbi data.
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*/
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vbi_pixfmt sampling_format;
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/**
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* Sampling rate in Hz, the number of samples or pixels
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* captured per second.
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*/
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int sampling_rate; /* Hz */
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/**
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* Number of samples or pixels captured per scan line,
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* in bytes. This determines the raw vbi image width and you
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* want it large enough to cover all data transmitted in the line (with
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* headroom).
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*/
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int bytes_per_line;
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/**
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* The distance from 0H (leading edge hsync, half amplitude point)
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* to the first sample (pixel) captured, in samples (pixels). You want
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* an offset small enough not to miss the start of the data
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* transmitted.
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*/
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int offset; /* 0H, samples */
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/**
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* First scan line to be captured, first and second field
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* respectively, according to the ITU-R line numbering scheme
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* (see vbi_sliced). Set to zero if the exact line number isn't
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* known.
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*/
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int start[2]; /* ITU-R numbering */
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/**
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* Number of scan lines captured, first and second
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* field respectively. This can be zero if only data from one
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* field is required. The sum @a count[0] + @a count[1] determines the
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* raw vbi image height.
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*/
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int count[2]; /* field lines */
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/**
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* In the raw vbi image, normally all lines of the second
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* field are supposed to follow all lines of the first field. When
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* this flag is set, the scan lines of first and second field
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* will be interleaved in memory. This implies @a count[0] and @a count[1]
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* are equal.
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*/
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vbi_bool interlaced;
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/**
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* Fields must be stored in temporal order, i. e. as the
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* lines have been captured. It is assumed that the first field is
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* also stored first in memory, however if the hardware cannot reliable
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* distinguish fields this flag shall be cleared, which disables
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* decoding of data services depending on the field number.
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*/
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vbi_bool synchronous;
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/*< private >*/
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GMutex mutex;
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unsigned int services;
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#if 0 /* DISABLED LEGACY DECODER */
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int num_jobs;
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#endif
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int8_t * pattern; /* The real vbi3_raw_decoder */
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#if 0 /* DISABLED LEGACY DECODER */
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struct _vbi_raw_decoder_job {
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unsigned int id;
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int offset;
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vbi_bit_slicer slicer;
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} jobs[8];
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#endif
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} vbi_raw_decoder;
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/**
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* @addtogroup Rawdec
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* @{
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*/
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extern void vbi_raw_decoder_init(vbi_raw_decoder *rd);
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extern void vbi_raw_decoder_reset(vbi_raw_decoder *rd);
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extern void vbi_raw_decoder_destroy(vbi_raw_decoder *rd);
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extern unsigned int vbi_raw_decoder_add_services(vbi_raw_decoder *rd,
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unsigned int services,
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int strict);
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extern unsigned int vbi_raw_decoder_check_services(vbi_raw_decoder *rd,
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unsigned int services, int strict);
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extern unsigned int vbi_raw_decoder_remove_services(vbi_raw_decoder *rd,
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unsigned int services);
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extern void vbi_raw_decoder_resize( vbi_raw_decoder *rd,
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int * start, unsigned int * count );
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extern unsigned int vbi_raw_decoder_parameters(vbi_raw_decoder *rd, unsigned int services,
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int scanning, int *max_rate);
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extern int vbi_raw_decode(vbi_raw_decoder *rd, uint8_t *raw, vbi_sliced *out);
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void vbi_initialize_gst_debug (void);
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/** @} */
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/* Private */
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#endif /* DECODER_H */
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/*
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Local variables:
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c-set-style: K&R
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c-basic-offset: 8
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End:
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*/
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