/* * nut * Copyright (c) 2004-2007 Michael Niedermayer * * 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 "nut.h" #include "tree.h" unsigned long av_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf, unsigned int len){ return av_crc(av_crc04C11DB7, checksum, buf, len); } void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val){ int i; for(i=0; i<nut->avf->nb_streams; i++){ nut->stream[i].last_pts= av_rescale_rnd( val / nut->time_base_count, time_base.num * (int64_t)nut->stream[i].time_base->den, time_base.den * (int64_t)nut->stream[i].time_base->num, AV_ROUND_DOWN); } } int64_t ff_lsb2full(StreamContext *stream, int64_t lsb){ int64_t mask = (1<<stream->msb_pts_shift)-1; int64_t delta= stream->last_pts - mask/2; return ((lsb - delta)&mask) + delta; } int ff_nut_sp_pos_cmp(syncpoint_t *a, syncpoint_t *b){ return (a->pos - b->pos>>32) - (b->pos - a->pos>>32); } int ff_nut_sp_pts_cmp(syncpoint_t *a, syncpoint_t *b){ return (a->ts - b->ts>>32) - (b->ts - a->ts>>32); } void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts){ syncpoint_t *sp2, *sp= av_mallocz(sizeof(syncpoint_t)); sp->pos= pos; sp->back_ptr= back_ptr; sp->ts= ts; sp2= av_tree_insert(&nut->syncpoints, sp, ff_nut_sp_pos_cmp); if(sp2 && sp2 != sp) av_free(sp); }