1/* 2 * nut 3 * Copyright (c) 2004-2007 Michael Niedermayer 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include "libavutil/tree.h" 23#include "nut.h" 24 25const AVCodecTag ff_nut_subtitle_tags[] = { 26 { CODEC_ID_TEXT , MKTAG('U', 'T', 'F', '8') }, 27 { CODEC_ID_SSA , MKTAG('S', 'S', 'A', 0 ) }, 28 { CODEC_ID_DVD_SUBTITLE, MKTAG('D', 'V', 'D', 'S') }, 29 { CODEC_ID_DVB_SUBTITLE, MKTAG('D', 'V', 'B', 'S') }, 30 { CODEC_ID_NONE , 0 } 31}; 32 33void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val){ 34 int i; 35 for(i=0; i<nut->avf->nb_streams; i++){ 36 nut->stream[i].last_pts= av_rescale_rnd( 37 val, 38 time_base.num * (int64_t)nut->stream[i].time_base->den, 39 time_base.den * (int64_t)nut->stream[i].time_base->num, 40 AV_ROUND_DOWN); 41 } 42} 43 44int64_t ff_lsb2full(StreamContext *stream, int64_t lsb){ 45 int64_t mask = (1<<stream->msb_pts_shift)-1; 46 int64_t delta= stream->last_pts - mask/2; 47 return ((lsb - delta)&mask) + delta; 48} 49 50int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b){ 51 return ((a->pos - b->pos) >> 32) - ((b->pos - a->pos) >> 32); 52} 53 54int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b){ 55 return ((a->ts - b->ts) >> 32) - ((b->ts - a->ts) >> 32); 56} 57 58void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts){ 59 Syncpoint *sp= av_mallocz(sizeof(Syncpoint)); 60 struct AVTreeNode *node= av_mallocz(av_tree_node_size); 61 62 sp->pos= pos; 63 sp->back_ptr= back_ptr; 64 sp->ts= ts; 65 av_tree_insert(&nut->syncpoints, sp, (void *) ff_nut_sp_pos_cmp, &node); 66 if(node){ 67 av_free(sp); 68 av_free(node); 69 } 70} 71 72static int enu_free(void *opaque, void *elem) 73{ 74 av_free(elem); 75 return 0; 76} 77 78void ff_nut_free_sp(NUTContext *nut) 79{ 80 av_tree_enumerate(nut->syncpoints, NULL, NULL, enu_free); 81 av_tree_destroy(nut->syncpoints); 82} 83 84const Dispositions ff_nut_dispositions[] = { 85 {"default" , AV_DISPOSITION_DEFAULT}, 86 {"dub" , AV_DISPOSITION_DUB}, 87 {"original" , AV_DISPOSITION_ORIGINAL}, 88 {"comment" , AV_DISPOSITION_COMMENT}, 89 {"lyrics" , AV_DISPOSITION_LYRICS}, 90 {"karaoke" , AV_DISPOSITION_KARAOKE}, 91 {"" , 0} 92}; 93 94const AVMetadataConv ff_nut_metadata_conv[] = { 95 { "Author", "artist" }, 96 { "X-CreationTime", "date" }, 97 { "CreationTime", "date" }, 98 { "SourceFilename", "filename" }, 99 { "X-Language", "language" }, 100 { "X-Disposition", "disposition" }, 101 { "X-Replaces", "replaces" }, 102 { "X-Depends", "depends" }, 103 { "X-Uses", "uses" }, 104 { "X-UsesFont", "usesfont" }, 105 { 0 }, 106}; 107