PeerStreamer

/*

 * nut

 * Copyright (c) 2004-2007 Michael Niedermayer

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include "libavutil/tree.h"

#include "nut.h"

#include "internal.h"

const AVCodecTag ff_nut_subtitle_tags[] = {

    { CODEC_ID_TEXT        , MKTAG('U', 'T', 'F', '8') },

    { CODEC_ID_SSA         , MKTAG('S', 'S', 'A',  0 ) },

    { CODEC_ID_DVD_SUBTITLE, MKTAG('D', 'V', 'D', 'S') },

    { CODEC_ID_DVB_SUBTITLE, MKTAG('D', 'V', 'B', 'S') },

    { CODEC_ID_NONE        , 0                         }

};

void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val){

    int i;

    for(i=0; i<nut->avf->nb_streams; i++){

        nut->stream[i].last_pts= av_rescale_rnd(

            val,

            time_base.num * (int64_t)nut->stream[i].time_base->den,

            time_base.den * (int64_t)nut->stream[i].time_base->num,

            AV_ROUND_DOWN);

    }

}

int64_t ff_lsb2full(StreamContext *stream, int64_t lsb){

    int64_t mask = (1<<stream->msb_pts_shift)-1;

    int64_t delta= stream->last_pts - mask/2;

    return  ((lsb - delta)&mask) + delta;

}

int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b){

    return ((a->pos - b->pos) >> 32) - ((b->pos - a->pos) >> 32);

}

int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b){

    return ((a->ts - b->ts) >> 32) - ((b->ts - a->ts) >> 32);

}

void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts){

    Syncpoint *sp= av_mallocz(sizeof(Syncpoint));

    struct AVTreeNode *node= av_mallocz(av_tree_node_size);

    sp->pos= pos;

    sp->back_ptr= back_ptr;

    sp->ts= ts;

    av_tree_insert(&nut->syncpoints, sp, (void *) ff_nut_sp_pos_cmp, &node);

    if(node){

        av_free(sp);

        av_free(node);

    }

}

static int enu_free(void *opaque, void *elem)

{

    av_free(elem);

    return 0;

}

void ff_nut_free_sp(NUTContext *nut)

{

    av_tree_enumerate(nut->syncpoints, NULL, NULL, enu_free);

    av_tree_destroy(nut->syncpoints);

}

const Dispositions ff_nut_dispositions[] = {

    {"default"     , AV_DISPOSITION_DEFAULT},

    {"dub"         , AV_DISPOSITION_DUB},

    {"original"    , AV_DISPOSITION_ORIGINAL},

    {"comment"     , AV_DISPOSITION_COMMENT},

    {"lyrics"      , AV_DISPOSITION_LYRICS},

    {"karaoke"     , AV_DISPOSITION_KARAOKE},

    {""            , 0}

};

const AVMetadataConv ff_nut_metadata_conv[] = {

    { "Author",         "artist"      },

    { "X-CreationTime", "date"        },

    { "CreationTime",   "date"        },

    { "SourceFilename", "filename"    },

    { "X-Language",     "language"    },

    { "X-Disposition",  "disposition" },

    { "X-Replaces",     "replaces"    },

    { "X-Depends",      "depends"     },

    { "X-Uses",         "uses"        },

    { "X-UsesFont",     "usesfont"    },

    { 0 },

};