Function http_prepare_data

ffserver.c:2228–2453

static int http_prepare_data(HTTPContext *c)
{
    int i, len, ret;
    AVFormatContext *ctx;

    av_freep(&c->pb_buffer);
    switch(c->state) {
    case HTTPSTATE_SEND_DATA_HEADER:
        memset(&c->fmt_ctx, 0, sizeof(c->fmt_ctx));
        av_metadata_set2(&c->fmt_ctx.metadata, "author"   , c->stream->author   , 0);
        av_metadata_set2(&c->fmt_ctx.metadata, "comment"  , c->stream->comment  , 0);
        av_metadata_set2(&c->fmt_ctx.metadata, "copyright", c->stream->copyright, 0);
        av_metadata_set2(&c->fmt_ctx.metadata, "title"    , c->stream->title    , 0);

        for(i=0;i<c->stream->nb_streams;i++) {
            AVStream *st;
            AVStream *src;
            st = av_mallocz(sizeof(AVStream));
            c->fmt_ctx.streams[i] = st;
            /* if file or feed, then just take streams from FFStream struct */
            if (!c->stream->feed ||
                c->stream->feed == c->stream)
                src = c->stream->streams[i];
            else
                src = c->stream->feed->streams[c->stream->feed_streams[i]];

            *st = *src;
            st->priv_data = 0;
            st->codec->frame_number = 0; /* XXX: should be done in
                                           AVStream, not in codec */
        }
        /* set output format parameters */
        c->fmt_ctx.oformat = c->stream->fmt;
        c->fmt_ctx.nb_streams = c->stream->nb_streams;

        c->got_key_frame = 0;

        /* prepare header and save header data in a stream */
        if (url_open_dyn_buf(&c->fmt_ctx.pb) < 0) {
            /* XXX: potential leak */
            return -1;
        }
        c->fmt_ctx.pb->is_streamed = 1;

        /*
         * HACK to avoid mpeg ps muxer to spit many underflow errors
         * Default value from FFmpeg
         * Try to set it use configuration option
         */
        c->fmt_ctx.preload   = (int)(0.5*AV_TIME_BASE);
        c->fmt_ctx.max_delay = (int)(0.7*AV_TIME_BASE);

        av_set_parameters(&c->fmt_ctx, NULL);
        if (av_write_header(&c->fmt_ctx) < 0) {
            http_log("Error writing output header\n");
            return -1;
        }
        av_metadata_free(&c->fmt_ctx.metadata);