Libav 0.7.1
libavformat/nut.c
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00001 /*
00002  * nut
00003  * Copyright (c) 2004-2007 Michael Niedermayer
00004  *
00005  * This file is part of Libav.
00006  *
00007  * Libav 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  * Libav 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 Libav; 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 #include "internal.h"
00025 
00026 const AVCodecTag ff_nut_subtitle_tags[] = {
00027     { CODEC_ID_TEXT        , MKTAG('U', 'T', 'F', '8') },
00028     { CODEC_ID_SSA         , MKTAG('S', 'S', 'A',  0 ) },
00029     { CODEC_ID_DVD_SUBTITLE, MKTAG('D', 'V', 'D', 'S') },
00030     { CODEC_ID_DVB_SUBTITLE, MKTAG('D', 'V', 'B', 'S') },
00031     { CODEC_ID_NONE        , 0                         }
00032 };
00033 
00034 const AVCodecTag ff_nut_video_tags[] = {
00035     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 15 ) },
00036     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 15 ) },
00037     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 16 ) },
00038     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 16 ) },
00039     { CODEC_ID_RAWVIDEO, MKTAG(15 , 'B', 'G', 'R') },
00040     { CODEC_ID_RAWVIDEO, MKTAG(15 , 'R', 'G', 'B') },
00041     { CODEC_ID_RAWVIDEO, MKTAG(16 , 'B', 'G', 'R') },
00042     { CODEC_ID_RAWVIDEO, MKTAG(16 , 'R', 'G', 'B') },
00043     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 12 ) },
00044     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 12 ) },
00045     { CODEC_ID_RAWVIDEO, MKTAG(12 , 'B', 'G', 'R') },
00046     { CODEC_ID_RAWVIDEO, MKTAG(12 , 'R', 'G', 'B') },
00047     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 'A') },
00048     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 'A') },
00049     { CODEC_ID_RAWVIDEO, MKTAG('A', 'B', 'G', 'R') },
00050     { CODEC_ID_RAWVIDEO, MKTAG('A', 'R', 'G', 'B') },
00051     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 24 ) },
00052     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 24 ) },
00053     { CODEC_ID_RAWVIDEO, MKTAG('4', '1', '1', 'P') },
00054     { CODEC_ID_RAWVIDEO, MKTAG('4', '2', '2', 'P') },
00055     { CODEC_ID_RAWVIDEO, MKTAG('4', '2', '2', 'P') },
00056     { CODEC_ID_RAWVIDEO, MKTAG('4', '4', '0', 'P') },
00057     { CODEC_ID_RAWVIDEO, MKTAG('4', '4', '0', 'P') },
00058     { CODEC_ID_RAWVIDEO, MKTAG('4', '4', '4', 'P') },
00059     { CODEC_ID_RAWVIDEO, MKTAG('4', '4', '4', 'P') },
00060     { CODEC_ID_RAWVIDEO, MKTAG('B', '1', 'W', '0') },
00061     { CODEC_ID_RAWVIDEO, MKTAG('B', '0', 'W', '1') },
00062     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R',  8 ) },
00063     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B',  8 ) },
00064     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R',  4 ) },
00065     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B',  4 ) },
00066     { CODEC_ID_RAWVIDEO, MKTAG('B', '4', 'B', 'Y') },
00067     { CODEC_ID_RAWVIDEO, MKTAG('R', '4', 'B', 'Y') },
00068     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 48 ) },
00069     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 48 ) },
00070     { CODEC_ID_RAWVIDEO, MKTAG(48 , 'B', 'G', 'R') },
00071     { CODEC_ID_RAWVIDEO, MKTAG(48 , 'R', 'G', 'B') },
00072     { CODEC_ID_RAWVIDEO, MKTAG('Y', '1',  0 , 16 ) },
00073     { CODEC_ID_RAWVIDEO, MKTAG(16 ,  0 , '1', 'Y') },
00074     { CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 11 , 16 ) },
00075     { CODEC_ID_RAWVIDEO, MKTAG(16 , 11 , '3', 'Y') },
00076     { CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 10 , 16 ) },
00077     { CODEC_ID_RAWVIDEO, MKTAG(16 , 10 , '3', 'Y') },
00078     { CODEC_ID_RAWVIDEO, MKTAG('Y', '3',  0 , 16 ) },
00079     { CODEC_ID_RAWVIDEO, MKTAG(16 ,  0 , '3', 'Y') },
00080     { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', 11 ,  8 ) },
00081     { CODEC_ID_RAWVIDEO, MKTAG('Y', '2',  0 ,  8 ) },
00082     { CODEC_ID_NONE    , 0                         }
00083 };
00084 
00085 void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val){
00086     int i;
00087     for(i=0; i<nut->avf->nb_streams; i++){
00088         nut->stream[i].last_pts= av_rescale_rnd(
00089             val,
00090             time_base.num * (int64_t)nut->stream[i].time_base->den,
00091             time_base.den * (int64_t)nut->stream[i].time_base->num,
00092             AV_ROUND_DOWN);
00093     }
00094 }
00095 
00096 int64_t ff_lsb2full(StreamContext *stream, int64_t lsb){
00097     int64_t mask = (1<<stream->msb_pts_shift)-1;
00098     int64_t delta= stream->last_pts - mask/2;
00099     return  ((lsb - delta)&mask) + delta;
00100 }
00101 
00102 int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b){
00103     return ((a->pos - b->pos) >> 32) - ((b->pos - a->pos) >> 32);
00104 }
00105 
00106 int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b){
00107     return ((a->ts - b->ts) >> 32) - ((b->ts - a->ts) >> 32);
00108 }
00109 
00110 void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts){
00111     Syncpoint *sp= av_mallocz(sizeof(Syncpoint));
00112     struct AVTreeNode *node= av_mallocz(av_tree_node_size);
00113 
00114     sp->pos= pos;
00115     sp->back_ptr= back_ptr;
00116     sp->ts= ts;
00117     av_tree_insert(&nut->syncpoints, sp, (void *) ff_nut_sp_pos_cmp, &node);
00118     if(node){
00119         av_free(sp);
00120         av_free(node);
00121     }
00122 }
00123 
00124 static int enu_free(void *opaque, void *elem)
00125 {
00126     av_free(elem);
00127     return 0;
00128 }
00129 
00130 void ff_nut_free_sp(NUTContext *nut)
00131 {
00132     av_tree_enumerate(nut->syncpoints, NULL, NULL, enu_free);
00133     av_tree_destroy(nut->syncpoints);
00134 }
00135 
00136 const Dispositions ff_nut_dispositions[] = {
00137     {"default"     , AV_DISPOSITION_DEFAULT},
00138     {"dub"         , AV_DISPOSITION_DUB},
00139     {"original"    , AV_DISPOSITION_ORIGINAL},
00140     {"comment"     , AV_DISPOSITION_COMMENT},
00141     {"lyrics"      , AV_DISPOSITION_LYRICS},
00142     {"karaoke"     , AV_DISPOSITION_KARAOKE},
00143     {""            , 0}
00144 };
00145 
00146 const AVMetadataConv ff_nut_metadata_conv[] = {
00147     { "Author",         "artist"      },
00148     { "X-CreationTime", "date"        },
00149     { "CreationTime",   "date"        },
00150     { "SourceFilename", "filename"    },
00151     { "X-Language",     "language"    },
00152     { "X-Disposition",  "disposition" },
00153     { "X-Replaces",     "replaces"    },
00154     { "X-Depends",      "depends"     },
00155     { "X-Uses",         "uses"        },
00156     { "X-UsesFont",     "usesfont"    },
00157     { 0 },
00158 };