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212 lines
5.1 KiB
C
212 lines
5.1 KiB
C
/*
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* libzvbi -- Raw VBI decoder
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*
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* Copyright (C) 2000-2004 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: raw_decoder.h,v 1.12 2008-02-19 00:35:21 mschimek Exp $ */
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#ifndef __ZVBI_RAW_DECODER_H__
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#define __ZVBI_RAW_DECODER_H__
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#include <stdio.h>
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#include "decoder.h"
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#include "sampling_par.h"
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#include "bit_slicer.h"
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VBI_BEGIN_DECLS
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/*
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* $ingroup RawDecoder
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* $brief Raw VBI decoder.
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*
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* The contents of this structure are private.
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* Call vbi3_raw_decoder_new() to allocate a raw VBI decoder.
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*/
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typedef struct _vbi3_raw_decoder vbi3_raw_decoder;
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/*
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* $addtogroup RawDecoder
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* ${
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*/
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extern vbi_bool
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vbi3_raw_decoder_sampling_point (vbi3_raw_decoder * rd,
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vbi3_bit_slicer_point *point,
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unsigned int row,
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unsigned int nth_bit);
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extern unsigned int
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vbi3_raw_decoder_decode (vbi3_raw_decoder * rd,
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vbi_sliced * sliced,
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unsigned int sliced_lines,
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const uint8_t * raw);
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extern void
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vbi3_raw_decoder_reset (vbi3_raw_decoder * rd);
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extern vbi_service_set
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vbi3_raw_decoder_services (vbi3_raw_decoder * rd);
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extern vbi_service_set
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vbi3_raw_decoder_remove_services
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(vbi3_raw_decoder * rd,
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vbi_service_set services);
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extern vbi_service_set
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vbi3_raw_decoder_add_services (vbi3_raw_decoder * rd,
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vbi_service_set services,
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int strict);
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extern vbi_bool
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vbi3_raw_decoder_debug (vbi3_raw_decoder * rd,
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vbi_bool enable);
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extern vbi_service_set
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vbi3_raw_decoder_set_sampling_par
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(vbi3_raw_decoder * rd,
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const vbi_sampling_par *sp,
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int strict);
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extern void
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vbi3_raw_decoder_get_sampling_par
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(const vbi3_raw_decoder *rd,
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vbi_sampling_par * sp);
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extern void
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vbi3_raw_decoder_set_log_fn (vbi3_raw_decoder * rd,
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vbi_log_fn * log_fn,
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void * user_data,
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vbi_log_mask mask);
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extern void
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vbi3_raw_decoder_delete (vbi3_raw_decoder * rd);
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extern vbi3_raw_decoder *
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vbi3_raw_decoder_new (const vbi_sampling_par *sp);
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/* $} */
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/* Private */
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/** @internal */
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#define _VBI3_RAW_DECODER_MAX_JOBS 8
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/** @internal */
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#define _VBI3_RAW_DECODER_MAX_WAYS 8
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/** @internal */
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typedef struct {
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vbi_service_set id;
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vbi3_bit_slicer slicer;
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} _vbi3_raw_decoder_job;
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/** @internal */
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typedef struct {
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vbi3_bit_slicer_point points[512];
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unsigned int n_points;
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} _vbi3_raw_decoder_sp_line;
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/**
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* @internal
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* Don't dereference pointers to this structure.
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* I guarantee it will change.
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*/
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struct _vbi3_raw_decoder {
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vbi_sampling_par sampling;
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vbi_service_set services;
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_vbi_log_hook log;
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vbi_bool debug;
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unsigned int n_jobs;
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unsigned int n_sp_lines;
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int readjust;
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int8_t * pattern; /* n scan lines * MAX_WAYS */
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_vbi3_raw_decoder_job jobs[_VBI3_RAW_DECODER_MAX_JOBS];
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_vbi3_raw_decoder_sp_line *sp_lines;
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};
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/** @internal */
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typedef enum {
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/** Requires field line numbers. */
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_VBI_SP_LINE_NUM = (1 << 0),
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/** Requires field numbers. */
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_VBI_SP_FIELD_NUM = (1 << 1),
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} _vbi_service_par_flag;
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typedef struct _vbi_service_par _vbi_service_par;
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/** @internal */
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struct _vbi_service_par {
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vbi_service_set id;
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const char * label;
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/**
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* Video standard
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* - 525 lines, FV = 59.94 Hz, FH = 15734 Hz
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* - 625 lines, FV = 50 Hz, FH = 15625 Hz
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*/
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vbi_videostd_set videostd_set;
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/**
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* Most scan lines used by the data service, first and last
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* line of first and second field. ITU-R numbering scheme.
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* Zero if no data from this field, requires field sync.
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*/
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unsigned int first[2];
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unsigned int last[2];
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/**
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* Leading edge hsync to leading edge first CRI one bit,
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* half amplitude points, in nanoseconds.
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*/
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unsigned int offset;
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unsigned int cri_rate; /**< Hz */
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unsigned int bit_rate; /**< Hz */
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/** Clock Run In and FRaming Code, LSB last txed bit of FRC. */
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unsigned int cri_frc;
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/** CRI and FRC bits significant for identification. */
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unsigned int cri_frc_mask;
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/**
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* Number of significat cri_bits (at cri_rate),
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* frc_bits (at bit_rate).
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*/
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unsigned int cri_bits;
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unsigned int frc_bits;
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unsigned int payload; /**< bits */
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vbi_modulation modulation;
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_vbi_service_par_flag flags;
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};
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extern const _vbi_service_par _vbi_service_table [];
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extern void
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_vbi3_raw_decoder_dump (const vbi3_raw_decoder *rd,
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FILE * fp);
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extern void
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_vbi3_raw_decoder_destroy (vbi3_raw_decoder * rd);
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extern vbi_bool
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_vbi3_raw_decoder_init (vbi3_raw_decoder * rd,
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const vbi_sampling_par *sp);
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VBI_END_DECLS
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#endif /* __ZVBI_RAW_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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