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80 lines
2.6 KiB
80 lines
2.6 KiB
/*****************************************************************************
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* helpers.h: WEBVTT helper
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*****************************************************************************
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* Copyright (C) 2020 VideoLabs, VLC authors and VideoLAN
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifndef WEBVTT_HELPERS_H
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#define WEBVTT_HELPERS_H
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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struct webvtt_cueelements_s
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{
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struct
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{
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const uint8_t *p_data;
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size_t i_data;
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} iden, sttg, payl;
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};
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static inline size_t
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WEBVTT_Pack_CueElementsGetNewSize( const struct webvtt_cueelements_s *els )
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{
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return 8 +
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(els->iden.i_data ? (els->iden.i_data + 8) : 0) +
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(els->sttg.i_data ? (els->sttg.i_data + 8) : 0) +
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els->payl.i_data + 8;
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}
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static inline void
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WEBVTT_Pack_CueElements( const struct webvtt_cueelements_s *els,
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uint8_t *p_dst )
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{
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size_t i_total = WEBVTT_Pack_CueElementsGetNewSize( els );
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/* root container */
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SetDWBE( &p_dst[0], i_total );
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memcpy( &p_dst[4], "vttc", 4 );
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p_dst += 8;
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/* id child */
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if( els->iden.i_data )
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{
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SetDWBE( &p_dst[0], 8 + els->iden.i_data );
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memcpy( &p_dst[4], "iden", 4 );
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memcpy( &p_dst[8], els->iden.p_data, els->iden.i_data );
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p_dst += 8 + els->iden.i_data;
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}
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/* cue settings child */
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if( els->sttg.i_data )
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{
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SetDWBE( &p_dst[0], 8 + els->sttg.i_data );
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memcpy( &p_dst[4], "sttg", 4 );
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memcpy( &p_dst[8], els->sttg.p_data, els->sttg.i_data );
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p_dst += 8 + els->sttg.i_data;
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}
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/* text */
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SetDWBE( &p_dst[0], 8 + els->payl.i_data );
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memcpy( &p_dst[4], "payl", 4 );
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memcpy( &p_dst[8], els->payl.p_data, els->payl.i_data );
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}
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif
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