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libavformat/nut.c

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00001 /*
00002  * nut
00003  * Copyright (c) 2004-2007 Michael Niedermayer
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #include "libavutil/tree.h"
00023 #include "nut.h"
00024 
00025 const AVCodecTag ff_nut_subtitle_tags[] = {
00026     { CODEC_ID_TEXT        , MKTAG('U', 'T', 'F', '8') },
00027     { CODEC_ID_SSA         , MKTAG('S', 'S', 'A',  0 ) },
00028     { CODEC_ID_DVD_SUBTITLE, MKTAG('D', 'V', 'D', 'S') },
00029     { CODEC_ID_DVB_SUBTITLE, MKTAG('D', 'V', 'B', 'S') },
00030     { CODEC_ID_NONE        , 0                         }
00031 };
00032 
00033 void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val){
00034     int i;
00035     for(i=0; i<nut->avf->nb_streams; i++){
00036         nut->stream[i].last_pts= av_rescale_rnd(
00037             val,
00038             time_base.num * (int64_t)nut->stream[i].time_base->den,
00039             time_base.den * (int64_t)nut->stream[i].time_base->num,
00040             AV_ROUND_DOWN);
00041     }
00042 }
00043 
00044 int64_t ff_lsb2full(StreamContext *stream, int64_t lsb){
00045     int64_t mask = (1<<stream->msb_pts_shift)-1;
00046     int64_t delta= stream->last_pts - mask/2;
00047     return  ((lsb - delta)&mask) + delta;
00048 }
00049 
00050 int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b){
00051     return ((a->pos - b->pos) >> 32) - ((b->pos - a->pos) >> 32);
00052 }
00053 
00054 int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b){
00055     return ((a->ts - b->ts) >> 32) - ((b->ts - a->ts) >> 32);
00056 }
00057 
00058 void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts){
00059     Syncpoint *sp= av_mallocz(sizeof(Syncpoint));
00060     struct AVTreeNode *node= av_mallocz(av_tree_node_size);
00061 
00062     sp->pos= pos;
00063     sp->back_ptr= back_ptr;
00064     sp->ts= ts;
00065     av_tree_insert(&nut->syncpoints, sp, (void *) ff_nut_sp_pos_cmp, &node);
00066     if(node){
00067         av_free(sp);
00068         av_free(node);
00069     }
00070 }
00071 
00072 static int enu_free(void *opaque, void *elem)
00073 {
00074     av_free(elem);
00075     return 0;
00076 }
00077 
00078 void ff_nut_free_sp(NUTContext *nut)
00079 {
00080     av_tree_enumerate(nut->syncpoints, NULL, NULL, enu_free);
00081     av_tree_destroy(nut->syncpoints);
00082 }
00083 
00084 const Dispositions ff_nut_dispositions[] = {
00085     {"default"     , AV_DISPOSITION_DEFAULT},
00086     {"dub"         , AV_DISPOSITION_DUB},
00087     {"original"    , AV_DISPOSITION_ORIGINAL},
00088     {"comment"     , AV_DISPOSITION_COMMENT},
00089     {"lyrics"      , AV_DISPOSITION_LYRICS},
00090     {"karaoke"     , AV_DISPOSITION_KARAOKE},
00091     {""            , 0}
00092 };
00093 
00094 const AVMetadataConv ff_nut_metadata_conv[] = {
00095     { "Author",         "artist"      },
00096     { "X-CreationTime", "date"        },
00097     { "CreationTime",   "date"        },
00098     { "SourceFilename", "filename"    },
00099     { "X-Language",     "language"    },
00100     { "X-Disposition",  "disposition" },
00101     { "X-Replaces",     "replaces"    },
00102     { "X-Depends",      "depends"     },
00103     { "X-Uses",         "uses"        },
00104     { "X-UsesFont",     "usesfont"    },
00105     { 0 },
00106 };

Generated on Fri Sep 16 2011 17:17:49 for FFmpeg by  doxygen 1.7.1