Function open_input

libavformat/hls.c:1391–1462

}

static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
{
    AVDictionary *opts = NULL;
    int ret;
    int is_http = 0;

    if (c->http_persistent)
        av_dict_set(&opts, "multiple_requests", "1", 0);

    if (seg->size >= 0) {
        /* try to restrict the HTTP request to the part we want
         * (if this is in fact a HTTP request) */
        av_dict_set_int(&opts, "offset", seg->url_offset, 0);
        av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
    }

    av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
           seg->url, seg->url_offset, pls->index);

    if (seg->key_type == KEY_AES_128 || seg->key_type == KEY_SAMPLE_AES) {
        if (strcmp(seg->key, pls->key_url)) {
            ret = read_key(c, pls, seg);
            if (ret < 0)
                goto cleanup;
        }
    }

    if (seg->key_type == KEY_AES_128) {
        char iv[33], key[33], url[MAX_URL_SIZE];
        ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
        ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
        if (strstr(seg->url, "://"))
            snprintf(url, sizeof(url), "crypto+%s", seg->url);
        else
            snprintf(url, sizeof(url), "crypto:%s", seg->url);

        av_dict_set(&opts, "key", key, 0);
        av_dict_set(&opts, "iv", iv, 0);

        ret = open_url(pls->parent, in, url, &c->avio_opts, opts, &is_http);
        if (ret < 0) {
            goto cleanup;
        }
        ret = 0;
    } else {
        ret = open_url(pls->parent, in, seg->url, &c->avio_opts, opts, &is_http);
    }

    /* Seek to the requested position. If this was a HTTP request, the offset
     * should already be where want it to, but this allows e.g. local testing
     * without a HTTP server.
     *
     * This is not done for HTTP at all as avio_seek() does internal bookkeeping
     * of file offset which is out-of-sync with the actual offset when "offset"
     * AVOption is used with http protocol, causing the seek to not be a no-op
     * as would be expected. Wrong offset received from the server will not be
     * noticed without the call, though.
     */