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/*
* Copyright (c) 2006 Smartjog S.A.S, Baptiste Coudurier <baptiste.coudurier@gmail.com>
* Copyright (c) 2011-2012 Smartjog S.A.S, Clément Bœsch <clement.boesch@smartjog.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "timecode_internal.h"
static unsigned bcd2uint(uint8_t bcd)
{
unsigned low = bcd & 0xf;
unsigned high = bcd >> 4;
if (low > 9 || high > 9)
return 0;
return low + 10*high;
}
void ff_timecode_set_smpte(unsigned *drop, unsigned *hh, unsigned *mm, unsigned *ss, unsigned *ff,
AVRational rate, uint32_t tcsmpte, int prevent_df, int skip_field)
{
*hh = bcd2uint(tcsmpte & 0x3f); // 6-bit hours
*mm = bcd2uint(tcsmpte>>8 & 0x7f); // 7-bit minutes
*ss = bcd2uint(tcsmpte>>16 & 0x7f); // 7-bit seconds
*ff = bcd2uint(tcsmpte>>24 & 0x3f); // 6-bit frames
*drop = tcsmpte & 1<<30 && !prevent_df; // 1-bit drop if not arbitrary bit
if (av_cmp_q(rate, (AVRational) {30, 1}) == 1) {
*ff <<= 1;
if (!skip_field) {
if (av_cmp_q(rate, (AVRational) {50, 1}) == 0)
*ff += !!(tcsmpte & 1 << 7);
else
*ff += !!(tcsmpte & 1 << 23);
}
}
}
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