FFmpeg: libavformat/nut.c Source File

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/mathematics.h"
00023 #include "libavutil/tree.h"
00024 #include "nut.h"
00025 #include "internal.h"
00026 
00027 const AVCodecTag ff_nut_subtitle_tags[] = {
00028     { CODEC_ID_TEXT        , MKTAG('U', 'T', 'F', '8') },
00029     { CODEC_ID_SSA         , MKTAG('S', 'S', 'A',  0 ) },
00030     { CODEC_ID_DVD_SUBTITLE, MKTAG('D', 'V', 'D', 'S') },
00031     { CODEC_ID_DVB_SUBTITLE, MKTAG('D', 'V', 'B', 'S') },
00032     { CODEC_ID_NONE        , 0                         }
00033 };
00034 
00035 const AVCodecTag ff_nut_video_tags[] = {
00036     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 15 ) },
00037     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 15 ) },
00038     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 16 ) },
00039     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 16 ) },
00040     { CODEC_ID_RAWVIDEO, MKTAG(15 , 'B', 'G', 'R') },
00041     { CODEC_ID_RAWVIDEO, MKTAG(15 , 'R', 'G', 'B') },
00042     { CODEC_ID_RAWVIDEO, MKTAG(16 , 'B', 'G', 'R') },
00043     { CODEC_ID_RAWVIDEO, MKTAG(16 , 'R', 'G', 'B') },
00044     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 12 ) },
00045     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 12 ) },
00046     { CODEC_ID_RAWVIDEO, MKTAG(12 , 'B', 'G', 'R') },
00047     { CODEC_ID_RAWVIDEO, MKTAG(12 , 'R', 'G', 'B') },
00048     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 'A') },
00049     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 'A') },
00050     { CODEC_ID_RAWVIDEO, MKTAG('A', 'B', 'G', 'R') },
00051     { CODEC_ID_RAWVIDEO, MKTAG('A', 'R', 'G', 'B') },
00052     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 24 ) },
00053     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 24 ) },
00054     { CODEC_ID_RAWVIDEO, MKTAG('4', '1', '1', 'P') },
00055     { CODEC_ID_RAWVIDEO, MKTAG('4', '2', '2', 'P') },
00056     { CODEC_ID_RAWVIDEO, MKTAG('4', '2', '2', 'P') },
00057     { CODEC_ID_RAWVIDEO, MKTAG('4', '4', '0', 'P') },
00058     { CODEC_ID_RAWVIDEO, MKTAG('4', '4', '0', 'P') },
00059     { CODEC_ID_RAWVIDEO, MKTAG('4', '4', '4', 'P') },
00060     { CODEC_ID_RAWVIDEO, MKTAG('4', '4', '4', 'P') },
00061     { CODEC_ID_RAWVIDEO, MKTAG('B', '1', 'W', '0') },
00062     { CODEC_ID_RAWVIDEO, MKTAG('B', '0', 'W', '1') },
00063     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R',  8 ) },
00064     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B',  8 ) },
00065     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R',  4 ) },
00066     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B',  4 ) },
00067     { CODEC_ID_RAWVIDEO, MKTAG('B', '4', 'B', 'Y') },
00068     { CODEC_ID_RAWVIDEO, MKTAG('R', '4', 'B', 'Y') },
00069     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 48 ) },
00070     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 48 ) },
00071     { CODEC_ID_RAWVIDEO, MKTAG(48 , 'B', 'G', 'R') },
00072     { CODEC_ID_RAWVIDEO, MKTAG(48 , 'R', 'G', 'B') },
00073     { CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 11 , 10 ) },
00074     { CODEC_ID_RAWVIDEO, MKTAG(10 , 11 , '3', 'Y') },
00075     { CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 10 , 10 ) },
00076     { CODEC_ID_RAWVIDEO, MKTAG(10 , 10 , '3', 'Y') },
00077     { CODEC_ID_RAWVIDEO, MKTAG('Y', '3',  0 , 10 ) },
00078     { CODEC_ID_RAWVIDEO, MKTAG(10 ,  0 , '3', 'Y') },
00079     { CODEC_ID_RAWVIDEO, MKTAG('Y', '1',  0 , 16 ) },
00080     { CODEC_ID_RAWVIDEO, MKTAG(16 ,  0 , '1', 'Y') },
00081     { CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 11 , 16 ) },
00082     { CODEC_ID_RAWVIDEO, MKTAG(16 , 11 , '3', 'Y') },
00083     { CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 10 , 16 ) },
00084     { CODEC_ID_RAWVIDEO, MKTAG(16 , 10 , '3', 'Y') },
00085     { CODEC_ID_RAWVIDEO, MKTAG('Y', '3',  0 , 16 ) },
00086     { CODEC_ID_RAWVIDEO, MKTAG(16 ,  0 , '3', 'Y') },
00087     { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', 11 ,  8 ) },
00088     { CODEC_ID_RAWVIDEO, MKTAG('Y', '2',  0 ,  8 ) },
00089     { CODEC_ID_NONE    , 0                         }
00090 };
00091 
00092 void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val){
00093     int i;
00094     for(i=0; i<nut->avf->nb_streams; i++){
00095         nut->stream[i].last_pts= av_rescale_rnd(
00096             val,
00097             time_base.num * (int64_t)nut->stream[i].time_base->den,
00098             time_base.den * (int64_t)nut->stream[i].time_base->num,
00099             AV_ROUND_DOWN);
00100     }
00101 }
00102 
00103 int64_t ff_lsb2full(StreamContext *stream, int64_t lsb){
00104     int64_t mask = (1<<stream->msb_pts_shift)-1;
00105     int64_t delta= stream->last_pts - mask/2;
00106     return  ((lsb - delta)&mask) + delta;
00107 }
00108 
00109 int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b){
00110     return ((a->pos - b->pos) >> 32) - ((b->pos - a->pos) >> 32);
00111 }
00112 
00113 int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b){
00114     return ((a->ts - b->ts) >> 32) - ((b->ts - a->ts) >> 32);
00115 }
00116 
00117 void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts){
00118     Syncpoint *sp= av_mallocz(sizeof(Syncpoint));
00119     struct AVTreeNode *node= av_mallocz(av_tree_node_size);
00120 
00121     sp->pos= pos;
00122     sp->back_ptr= back_ptr;
00123     sp->ts= ts;
00124     av_tree_insert(&nut->syncpoints, sp, (void *) ff_nut_sp_pos_cmp, &node);
00125     if(node){
00126         av_free(sp);
00127         av_free(node);
00128     }
00129 }
00130 
00131 static int enu_free(void *opaque, void *elem)
00132 {
00133     av_free(elem);
00134     return 0;
00135 }
00136 
00137 void ff_nut_free_sp(NUTContext *nut)
00138 {
00139     av_tree_enumerate(nut->syncpoints, NULL, NULL, enu_free);
00140     av_tree_destroy(nut->syncpoints);
00141 }
00142 
00143 const Dispositions ff_nut_dispositions[] = {
00144     {"default"     , AV_DISPOSITION_DEFAULT},
00145     {"dub"         , AV_DISPOSITION_DUB},
00146     {"original"    , AV_DISPOSITION_ORIGINAL},
00147     {"comment"     , AV_DISPOSITION_COMMENT},
00148     {"lyrics"      , AV_DISPOSITION_LYRICS},
00149     {"karaoke"     , AV_DISPOSITION_KARAOKE},
00150     {""            , 0}
00151 };
00152 
00153 const AVMetadataConv ff_nut_metadata_conv[] = {
00154     { "Author",         "artist"      },
00155     { "X-CreationTime", "date"        },
00156     { "CreationTime",   "date"        },
00157     { "SourceFilename", "filename"    },
00158     { "X-Language",     "language"    },
00159     { "X-Disposition",  "disposition" },
00160     { "X-Replaces",     "replaces"    },
00161     { "X-Depends",      "depends"     },
00162     { "X-Uses",         "uses"        },
00163     { "X-UsesFont",     "usesfont"    },
00164     { 0 },
00165 };