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https://git.ffmpeg.org/ffmpeg.git
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82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
/*
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* nut
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* Copyright (c) 2004-2007 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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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* 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
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/tree.h"
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#include "nut.h"
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const AVCodecTag ff_nut_subtitle_tags[] = {
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{ CODEC_ID_TEXT , MKTAG('U', 'T', 'F', '8') },
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{ CODEC_ID_SSA , MKTAG('S', 'S', 'A', 0 ) },
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{ CODEC_ID_DVD_SUBTITLE, MKTAG('D', 'V', 'D', 'S') },
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{ CODEC_ID_DVB_SUBTITLE, MKTAG('D', 'V', 'B', 'S') },
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{ CODEC_ID_NONE , 0 }
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};
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void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val){
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int i;
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for(i=0; i<nut->avf->nb_streams; i++){
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nut->stream[i].last_pts= av_rescale_rnd(
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val,
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time_base.num * (int64_t)nut->stream[i].time_base->den,
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time_base.den * (int64_t)nut->stream[i].time_base->num,
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AV_ROUND_DOWN);
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}
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}
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int64_t ff_lsb2full(StreamContext *stream, int64_t lsb){
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int64_t mask = (1<<stream->msb_pts_shift)-1;
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int64_t delta= stream->last_pts - mask/2;
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return ((lsb - delta)&mask) + delta;
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}
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int ff_nut_sp_pos_cmp(Syncpoint *a, Syncpoint *b){
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return ((a->pos - b->pos) >> 32) - ((b->pos - a->pos) >> 32);
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}
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int ff_nut_sp_pts_cmp(Syncpoint *a, Syncpoint *b){
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return ((a->ts - b->ts) >> 32) - ((b->ts - a->ts) >> 32);
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}
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void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts){
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Syncpoint *sp= av_mallocz(sizeof(Syncpoint));
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struct AVTreeNode *node= av_mallocz(av_tree_node_size);
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sp->pos= pos;
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sp->back_ptr= back_ptr;
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sp->ts= ts;
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av_tree_insert(&nut->syncpoints, sp, ff_nut_sp_pos_cmp, &node);
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if(node){
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av_free(sp);
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av_free(node);
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}
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}
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const Dispositions ff_nut_dispositions[] = {
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{"default" , AV_DISPOSITION_DEFAULT},
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{"dub" , AV_DISPOSITION_DUB},
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{"original" , AV_DISPOSITION_ORIGINAL},
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{"comment" , AV_DISPOSITION_COMMENT},
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{"lyrics" , AV_DISPOSITION_LYRICS},
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{"karaoke" , AV_DISPOSITION_KARAOKE},
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{"" , 0}
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};
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