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     { AV_CODEC_ID_TEXT        , MKTAG('U', 'T', 'F', '8') },
00029     { AV_CODEC_ID_SSA         , MKTAG('S', 'S', 'A',  0 ) },
00030     { AV_CODEC_ID_DVD_SUBTITLE, MKTAG('D', 'V', 'D', 'S') },
00031     { AV_CODEC_ID_DVB_SUBTITLE, MKTAG('D', 'V', 'B', 'S') },
00032     { AV_CODEC_ID_DVB_TELETEXT, MKTAG('D', 'V', 'B', 'T') },
00033     { AV_CODEC_ID_NONE        , 0                         }
00034 };
00035 
00036 const AVCodecTag ff_nut_video_tags[] = {
00037     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 15 ) },
00038     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 15 ) },
00039     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 16 ) },
00040     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 16 ) },
00041     { AV_CODEC_ID_RAWVIDEO, MKTAG(15 , 'B', 'G', 'R') },
00042     { AV_CODEC_ID_RAWVIDEO, MKTAG(15 , 'R', 'G', 'B') },
00043     { AV_CODEC_ID_RAWVIDEO, MKTAG(16 , 'B', 'G', 'R') },
00044     { AV_CODEC_ID_RAWVIDEO, MKTAG(16 , 'R', 'G', 'B') },
00045     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 12 ) },
00046     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 12 ) },
00047     { AV_CODEC_ID_RAWVIDEO, MKTAG(12 , 'B', 'G', 'R') },
00048     { AV_CODEC_ID_RAWVIDEO, MKTAG(12 , 'R', 'G', 'B') },
00049     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 'A') },
00050     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B',  0 ) },
00051     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 'A') },
00052     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R',  0 ) },
00053     { AV_CODEC_ID_RAWVIDEO, MKTAG('A', 'B', 'G', 'R') },
00054     { AV_CODEC_ID_RAWVIDEO, MKTAG( 0 , 'B', 'G', 'R') },
00055     { AV_CODEC_ID_RAWVIDEO, MKTAG('A', 'R', 'G', 'B') },
00056     { AV_CODEC_ID_RAWVIDEO, MKTAG( 0 , 'R', 'G', 'B') },
00057     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 24 ) },
00058     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 24 ) },
00059     { AV_CODEC_ID_RAWVIDEO, MKTAG('4', '1', '1', 'P') },
00060     { AV_CODEC_ID_RAWVIDEO, MKTAG('4', '2', '2', 'P') },
00061     { AV_CODEC_ID_RAWVIDEO, MKTAG('4', '2', '2', 'P') },
00062     { AV_CODEC_ID_RAWVIDEO, MKTAG('4', '4', '0', 'P') },
00063     { AV_CODEC_ID_RAWVIDEO, MKTAG('4', '4', '0', 'P') },
00064     { AV_CODEC_ID_RAWVIDEO, MKTAG('4', '4', '4', 'P') },
00065     { AV_CODEC_ID_RAWVIDEO, MKTAG('4', '4', '4', 'P') },
00066     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', '1', 'W', '0') },
00067     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', '0', 'W', '1') },
00068     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R',  8 ) },
00069     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B',  8 ) },
00070     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R',  4 ) },
00071     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B',  4 ) },
00072     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', '4', 'B', 'Y') },
00073     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', '4', 'B', 'Y') },
00074     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 48 ) },
00075     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 48 ) },
00076     { AV_CODEC_ID_RAWVIDEO, MKTAG(48 , 'B', 'G', 'R') },
00077     { AV_CODEC_ID_RAWVIDEO, MKTAG(48 , 'R', 'G', 'B') },
00078     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', 'R', 'A', 64 ) },
00079     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'B', 'A', 64 ) },
00080     { AV_CODEC_ID_RAWVIDEO, MKTAG(64 , 'B', 'R', 'A') },
00081     { AV_CODEC_ID_RAWVIDEO, MKTAG(64 , 'R', 'B', 'A') },
00082     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 11 , 10 ) },
00083     { AV_CODEC_ID_RAWVIDEO, MKTAG(10 , 11 , '3', 'Y') },
00084     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 10 , 10 ) },
00085     { AV_CODEC_ID_RAWVIDEO, MKTAG(10 , 10 , '3', 'Y') },
00086     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3',  0 , 10 ) },
00087     { AV_CODEC_ID_RAWVIDEO, MKTAG(10 ,  0 , '3', 'Y') },
00088     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 11 , 12 ) },
00089     { AV_CODEC_ID_RAWVIDEO, MKTAG(12 , 11 , '3', 'Y') },
00090     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 10 , 12 ) },
00091     { AV_CODEC_ID_RAWVIDEO, MKTAG(12 , 10 , '3', 'Y') },
00092     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3',  0 , 12 ) },
00093     { AV_CODEC_ID_RAWVIDEO, MKTAG(12 ,  0 , '3', 'Y') },
00094     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 11 , 14 ) },
00095     { AV_CODEC_ID_RAWVIDEO, MKTAG(14 , 11 , '3', 'Y') },
00096     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 10 , 14 ) },
00097     { AV_CODEC_ID_RAWVIDEO, MKTAG(14 , 10 , '3', 'Y') },
00098     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3',  0 , 14 ) },
00099     { AV_CODEC_ID_RAWVIDEO, MKTAG(14 ,  0 , '3', 'Y') },
00100     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '1',  0 , 16 ) },
00101     { AV_CODEC_ID_RAWVIDEO, MKTAG(16 ,  0 , '1', 'Y') },
00102     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 11 , 16 ) },
00103     { AV_CODEC_ID_RAWVIDEO, MKTAG(16 , 11 , '3', 'Y') },
00104     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3', 10 , 16 ) },
00105     { AV_CODEC_ID_RAWVIDEO, MKTAG(16 , 10 , '3', 'Y') },
00106     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '3',  0 , 16 ) },
00107     { AV_CODEC_ID_RAWVIDEO, MKTAG(16 ,  0 , '3', 'Y') },
00108     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', 11 ,  8 ) },
00109     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', 10 ,  8 ) },
00110     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4',  0 ,  8 ) },
00111     { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '2',  0 ,  8 ) },
00112     { AV_CODEC_ID_NONE    , 0                         }
00113 };
00114 
00115 void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val){
00116     int i;
00117     for(i=0; i<nut->avf->nb_streams; i++){
00118         nut->stream[i].last_pts= av_rescale_rnd(
00119             val,
00120             time_base.num * (int64_t)nut->stream[i].time_base->den,
00121             time_base.den * (int64_t)nut->stream[i].time_base->num,
00122             AV_ROUND_DOWN);
00123     }
00124 }
00125 
00126 int64_t ff_lsb2full(StreamContext *stream, int64_t lsb){
00127     int64_t mask = (1<<stream->msb_pts_shift)-1;
00128     int64_t delta= stream->last_pts - mask/2;
00129     return  ((lsb - delta)&mask) + delta;
00130 }
00131 
00132 int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b){
00133     return ((a->pos - b->pos) >> 32) - ((b->pos - a->pos) >> 32);
00134 }
00135 
00136 int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b){
00137     return ((a->ts - b->ts) >> 32) - ((b->ts - a->ts) >> 32);
00138 }
00139 
00140 void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts){
00141     Syncpoint *sp= av_mallocz(sizeof(Syncpoint));
00142     struct AVTreeNode *node= av_mallocz(av_tree_node_size);
00143 
00144     nut->sp_count++;
00145 
00146     sp->pos= pos;
00147     sp->back_ptr= back_ptr;
00148     sp->ts= ts;
00149     av_tree_insert(&nut->syncpoints, sp, (void *) ff_nut_sp_pos_cmp, &node);
00150     if(node){
00151         av_free(sp);
00152         av_free(node);
00153     }
00154 }
00155 
00156 static int enu_free(void *opaque, void *elem)
00157 {
00158     av_free(elem);
00159     return 0;
00160 }
00161 
00162 void ff_nut_free_sp(NUTContext *nut)
00163 {
00164     av_tree_enumerate(nut->syncpoints, NULL, NULL, enu_free);
00165     av_tree_destroy(nut->syncpoints);
00166 }
00167 
00168 const Dispositions ff_nut_dispositions[] = {
00169     {"default"     , AV_DISPOSITION_DEFAULT},
00170     {"dub"         , AV_DISPOSITION_DUB},
00171     {"original"    , AV_DISPOSITION_ORIGINAL},
00172     {"comment"     , AV_DISPOSITION_COMMENT},
00173     {"lyrics"      , AV_DISPOSITION_LYRICS},
00174     {"karaoke"     , AV_DISPOSITION_KARAOKE},
00175     {""            , 0}
00176 };
00177 
00178 const AVMetadataConv ff_nut_metadata_conv[] = {
00179     { "Author",         "artist"      },
00180     { "X-CreationTime", "date"        },
00181     { "CreationTime",   "date"        },
00182     { "SourceFilename", "filename"    },
00183     { "X-Language",     "language"    },
00184     { "X-Disposition",  "disposition" },
00185     { "X-Replaces",     "replaces"    },
00186     { "X-Depends",      "depends"     },
00187     { "X-Uses",         "uses"        },
00188     { "X-UsesFont",     "usesfont"    },
00189     { 0 },
00190 };