ffserver.c

    const char *p;

    for (p = request; *p && *p != '\r' && *p != '\n'; ) {
        if (strncasecmp(p, "Pragma:", 7) == 0) {
            const char *q = p + 7;

            while (*q && *q != '\n' && isspace(*q))
                q++;

            if (strncasecmp(q, "stream-switch-entry=", 20) == 0) {
                int stream_no;
                int rate_no;

                q += 20;

                memset(rates, 0xff, ratelen);

                while (1) {
                    while (*q && *q != '\n' && *q != ':')
                        q++;

                    if (sscanf(q, ":%d:%d", &stream_no, &rate_no) != 2)
                        break;

                    stream_no--;
                    if (stream_no < ratelen && stream_no >= 0)
                        rates[stream_no] = rate_no;

                    while (*q && *q != '\n' && !isspace(*q))
                        q++;
                }

                return 1;
            }
        }
        p = strchr(p, '\n');
        if (!p)
            break;

        p++;
    }

    return 0;
}

static int find_stream_in_feed(FFStream *feed, AVCodecContext *codec, int bit_rate)
{
    int i;
    int best_bitrate = 100000000;
    int best = -1;

    for (i = 0; i < feed->nb_streams; i++) {
        AVCodecContext *feed_codec = feed->streams[i]->codec;

        if (feed_codec->codec_id != codec->codec_id ||
            feed_codec->sample_rate != codec->sample_rate ||
            feed_codec->width != codec->width ||
            feed_codec->height != codec->height)
            continue;

        /* Potential stream */

        /* We want the fastest stream less than bit_rate, or the slowest
         * faster than bit_rate
         */

        if (feed_codec->bit_rate <= bit_rate) {
            if (best_bitrate > bit_rate || feed_codec->bit_rate > best_bitrate) {
                best_bitrate = feed_codec->bit_rate;
                best = i;
            }
        } else {
            if (feed_codec->bit_rate < best_bitrate) {
                best_bitrate = feed_codec->bit_rate;
                best = i;
            }
        }
    }

    return best;
}

static int modify_current_stream(HTTPContext *c, char *rates)
{
    int i;
    FFStream *req = c->stream;
    int action_required = 0;

    /* Not much we can do for a feed */
    if (!req->feed)
        return 0;

    for (i = 0; i < req->nb_streams; i++) {
        AVCodecContext *codec = req->streams[i]->codec;

        switch(rates[i]) {
            case 0:
                c->switch_feed_streams[i] = req->feed_streams[i];
                break;
            case 1:
                c->switch_feed_streams[i] = find_stream_in_feed(req->feed, codec, codec->bit_rate / 2);
                break;
            case 2:
                /* Wants off or slow */
                c->switch_feed_streams[i] = find_stream_in_feed(req->feed, codec, codec->bit_rate / 4);
#ifdef WANTS_OFF
                /* This doesn't work well when it turns off the only stream! */
                c->switch_feed_streams[i] = -2;
                c->feed_streams[i] = -2;
#endif
                break;
        }

        if (c->switch_feed_streams[i] >= 0 && c->switch_feed_streams[i] != c->feed_streams[i])
            action_required = 1;
    }

    return action_required;
}


static void do_switch_stream(HTTPContext *c, int i)
{
    if (c->switch_feed_streams[i] >= 0) {
#ifdef PHILIP
        c->feed_streams[i] = c->switch_feed_streams[i];
#endif

        /* Now update the stream */
    }
    c->switch_feed_streams[i] = -1;
}

/* XXX: factorize in utils.c ? */
/* XXX: take care with different space meaning */
static void skip_spaces(const char **pp)
{
    const char *p;
    p = *pp;
    while (*p == ' ' || *p == '\t')
        p++;
    *pp = p;
}

static void get_word(char *buf, int buf_size, const char **pp)
{
    const char *p;
    char *q;

    p = *pp;
    skip_spaces(&p);
    q = buf;
    while (!isspace(*p) && *p != '\0') {
        if ((q - buf) < buf_size - 1)
            *q++ = *p;
        p++;
    }
    if (buf_size > 0)
        *q = '\0';
    *pp = p;
}

static int validate_acl(FFStream *stream, HTTPContext *c)
{
    enum IPAddressAction last_action = IP_DENY;
    IPAddressACL *acl;
    struct in_addr *src = &c->from_addr.sin_addr;
    unsigned long src_addr = src->s_addr;

    for (acl = stream->acl; acl; acl = acl->next) {
        if (src_addr >= acl->first.s_addr && src_addr <= acl->last.s_addr)
            return (acl->action == IP_ALLOW) ? 1 : 0;
        last_action = acl->action;
    }

    /* Nothing matched, so return not the last action */
    return (last_action == IP_DENY) ? 1 : 0;
}

/* compute the real filename of a file by matching it without its
   extensions to all the stream filenames */
static void compute_real_filename(char *filename, int max_size)
{
    char file1[1024];
    char file2[1024];
    char *p;
    FFStream *stream;

    /* compute filename by matching without the file extensions */
    av_strlcpy(file1, filename, sizeof(file1));
    p = strrchr(file1, '.');
    if (p)
        *p = '\0';
    for(stream = first_stream; stream != NULL; stream = stream->next) {
        av_strlcpy(file2, stream->filename, sizeof(file2));
        p = strrchr(file2, '.');
        if (p)
            *p = '\0';
        if (!strcmp(file1, file2)) {
            av_strlcpy(filename, stream->filename, max_size);
            break;
        }
    }
}

enum RedirType {
    REDIR_NONE,
    REDIR_ASX,
    REDIR_RAM,
    REDIR_ASF,
    REDIR_RTSP,
    REDIR_SDP,
};

/* parse http request and prepare header */
static int http_parse_request(HTTPContext *c)
{
    char *p;
    enum RedirType redir_type;
    char cmd[32];
    char info[1024], filename[1024];
    char url[1024], *q;
    char protocol[32];
    char msg[1024];
    const char *mime_type;
    FFStream *stream;
    int i;
    char ratebuf[32];
    char *useragent = 0;

    p = c->buffer;
    get_word(cmd, sizeof(cmd), (const char **)&p);
    av_strlcpy(c->method, cmd, sizeof(c->method));

    if (!strcmp(cmd, "GET"))
        c->post = 0;
    else if (!strcmp(cmd, "POST"))
        c->post = 1;
    else
        return -1;

    get_word(url, sizeof(url), (const char **)&p);
    av_strlcpy(c->url, url, sizeof(c->url));

    get_word(protocol, sizeof(protocol), (const char **)&p);
    if (strcmp(protocol, "HTTP/1.0") && strcmp(protocol, "HTTP/1.1"))
        return -1;

    av_strlcpy(c->protocol, protocol, sizeof(c->protocol));

    if (ffserver_debug)
        http_log("New connection: %s %s\n", cmd, url);

    /* find the filename and the optional info string in the request */
    p = strchr(url, '?');
    if (p) {
        av_strlcpy(info, p, sizeof(info));
        *p = '\0';
    } else
        info[0] = '\0';

    av_strlcpy(filename, url + ((*url == '/') ? 1 : 0), sizeof(filename)-1);

    for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
        if (strncasecmp(p, "User-Agent:", 11) == 0) {
            useragent = p + 11;
            if (*useragent && *useragent != '\n' && isspace(*useragent))
                useragent++;
            break;
        }
        p = strchr(p, '\n');
        if (!p)
            break;

        p++;
    }

    redir_type = REDIR_NONE;
    if (match_ext(filename, "asx")) {
        redir_type = REDIR_ASX;
        filename[strlen(filename)-1] = 'f';
    } else if (match_ext(filename, "asf") &&
        (!useragent || strncasecmp(useragent, "NSPlayer", 8) != 0)) {
        /* if this isn't WMP or lookalike, return the redirector file */
        redir_type = REDIR_ASF;
    } else if (match_ext(filename, "rpm,ram")) {
        redir_type = REDIR_RAM;
        strcpy(filename + strlen(filename)-2, "m");
    } else if (match_ext(filename, "rtsp")) {
        redir_type = REDIR_RTSP;
        compute_real_filename(filename, sizeof(filename) - 1);
    } else if (match_ext(filename, "sdp")) {
        redir_type = REDIR_SDP;
        compute_real_filename(filename, sizeof(filename) - 1);
    }

    // "redirect" / request to index.html
    if (!strlen(filename))
        av_strlcpy(filename, "index.html", sizeof(filename) - 1);

    stream = first_stream;
    while (stream != NULL) {
        if (!strcmp(stream->filename, filename) && validate_acl(stream, c))
            break;
        stream = stream->next;
    }
    if (stream == NULL) {
        snprintf(msg, sizeof(msg), "File '%s' not found", url);
        goto send_error;
    }

    c->stream = stream;
    memcpy(c->feed_streams, stream->feed_streams, sizeof(c->feed_streams));
    memset(c->switch_feed_streams, -1, sizeof(c->switch_feed_streams));

    if (stream->stream_type == STREAM_TYPE_REDIRECT) {
        c->http_error = 301;
        q = c->buffer;
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "HTTP/1.0 301 Moved\r\n");
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Location: %s\r\n", stream->feed_filename);
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Content-type: text/html\r\n");
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "\r\n");
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "<html><head><title>Moved</title></head><body>\r\n");
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "You should be <a href=\"%s\">redirected</a>.\r\n", stream->feed_filename);
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "</body></html>\r\n");

        /* prepare output buffer */
        c->buffer_ptr = c->buffer;
        c->buffer_end = q;
        c->state = HTTPSTATE_SEND_HEADER;
        return 0;
    }

    /* If this is WMP, get the rate information */
    if (extract_rates(ratebuf, sizeof(ratebuf), c->buffer)) {
        if (modify_current_stream(c, ratebuf)) {
            for (i = 0; i < sizeof(c->feed_streams) / sizeof(c->feed_streams[0]); i++) {
                if (c->switch_feed_streams[i] >= 0)
                    do_switch_stream(c, i);
            }
        }
    }

    /* If already streaming this feed, do not let start another feeder. */
    if (stream->feed_opened) {
        snprintf(msg, sizeof(msg), "This feed is already being received.");
        http_log("feed %s already being received\n", stream->feed_filename);
        goto send_error;
    }

    if (c->post == 0 && stream->stream_type == STREAM_TYPE_LIVE)
        current_bandwidth += stream->bandwidth;

    if (c->post == 0 && max_bandwidth < current_bandwidth) {
        c->http_error = 200;
        q = c->buffer;
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "HTTP/1.0 200 Server too busy\r\n");
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Content-type: text/html\r\n");
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "\r\n");
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "<html><head><title>Too busy</title></head><body>\r\n");
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "<p>The server is too busy to serve your request at this time.</p>\r\n");
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "<p>The bandwidth being served (including your stream) is %lldkbit/sec, and this exceeds the limit of %lldkbit/sec.</p>\r\n",
            current_bandwidth, max_bandwidth);
        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "</body></html>\r\n");

        /* prepare output buffer */
        c->buffer_ptr = c->buffer;
        c->buffer_end = q;
        c->state = HTTPSTATE_SEND_HEADER;
        return 0;
    }

    if (redir_type != REDIR_NONE) {
        char *hostinfo = 0;

        for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
            if (strncasecmp(p, "Host:", 5) == 0) {
                hostinfo = p + 5;
                break;
            }
            p = strchr(p, '\n');
            if (!p)
                break;

            p++;
        }

        if (hostinfo) {
            char *eoh;
            char hostbuf[260];

            while (isspace(*hostinfo))
                hostinfo++;

            eoh = strchr(hostinfo, '\n');
            if (eoh) {
                if (eoh[-1] == '\r')
                    eoh--;

                if (eoh - hostinfo < sizeof(hostbuf) - 1) {
                    memcpy(hostbuf, hostinfo, eoh - hostinfo);
                    hostbuf[eoh - hostinfo] = 0;

                    c->http_error = 200;
                    q = c->buffer;
                    switch(redir_type) {
                    case REDIR_ASX:
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "HTTP/1.0 200 ASX Follows\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Content-type: video/x-ms-asf\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "<ASX Version=\"3\">\r\n");
                        //q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "<!-- Autogenerated by ffserver -->\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "<ENTRY><REF HREF=\"http://%s/%s%s\"/></ENTRY>\r\n",
                                hostbuf, filename, info);
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "</ASX>\r\n");
                        break;
                    case REDIR_RAM:
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "HTTP/1.0 200 RAM Follows\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Content-type: audio/x-pn-realaudio\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "# Autogenerated by ffserver\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "http://%s/%s%s\r\n",
                                hostbuf, filename, info);
                        break;
                    case REDIR_ASF:
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "HTTP/1.0 200 ASF Redirect follows\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Content-type: video/x-ms-asf\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "[Reference]\r\n");
                        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Ref1=http://%s/%s%s\r\n",
                                hostbuf, filename, info);
                        break;
                    case REDIR_RTSP:
                        {
                            char hostname[256], *p;
                            /* extract only hostname */
                            av_strlcpy(hostname, hostbuf, sizeof(hostname));
                            p = strrchr(hostname, ':');
                            if (p)
                                *p = '\0';
                            q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "HTTP/1.0 200 RTSP Redirect follows\r\n");
                            /* XXX: incorrect mime type ? */
                            q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Content-type: application/x-rtsp\r\n");
                            q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "\r\n");
                            q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "rtsp://%s:%d/%s\r\n",
                                         hostname, ntohs(my_rtsp_addr.sin_port),
                                         filename);
                        }
                        break;
                    case REDIR_SDP:
                        {
                            uint8_t *sdp_data;
                            int sdp_data_size, len;
                            struct sockaddr_in my_addr;

                            q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "HTTP/1.0 200 OK\r\n");
                            q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Content-type: application/sdp\r\n");
                            q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "\r\n");

                            len = sizeof(my_addr);
                            getsockname(c->fd, (struct sockaddr *)&my_addr, &len);

                            /* XXX: should use a dynamic buffer */
                            sdp_data_size = prepare_sdp_description(stream,
                                                                    &sdp_data,
                                                                    my_addr.sin_addr);
                            if (sdp_data_size > 0) {
                                memcpy(q, sdp_data, sdp_data_size);
                                q += sdp_data_size;
                                *q = '\0';
                                av_free(sdp_data);
                            }
                        }
                        break;
                    default:
                        abort();
                        break;
                    }

                    /* prepare output buffer */
                    c->buffer_ptr = c->buffer;
                    c->buffer_end = q;
                    c->state = HTTPSTATE_SEND_HEADER;
                    return 0;
                }
            }
        }

        snprintf(msg, sizeof(msg), "ASX/RAM file not handled");
        goto send_error;
    }

    stream->conns_served++;

    /* XXX: add there authenticate and IP match */

    if (c->post) {
        /* if post, it means a feed is being sent */
        if (!stream->is_feed) {
            /* However it might be a status report from WMP! Lets log the data
             * as it might come in handy one day
             */
            char *logline = 0;
            int client_id = 0;

            for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
                if (strncasecmp(p, "Pragma: log-line=", 17) == 0) {
                    logline = p;
                    break;
                }
                if (strncasecmp(p, "Pragma: client-id=", 18) == 0)
                    client_id = strtol(p + 18, 0, 10);
                p = strchr(p, '\n');
                if (!p)
                    break;

                p++;
            }

            if (logline) {
                char *eol = strchr(logline, '\n');

                logline += 17;

                if (eol) {
                    if (eol[-1] == '\r')
                        eol--;
                    http_log("%.*s\n", (int) (eol - logline), logline);
                    c->suppress_log = 1;
                }
            }

#ifdef DEBUG_WMP
            http_log("\nGot request:\n%s\n", c->buffer);
#endif

            if (client_id && extract_rates(ratebuf, sizeof(ratebuf), c->buffer)) {
                HTTPContext *wmpc;

                /* Now we have to find the client_id */
                for (wmpc = first_http_ctx; wmpc; wmpc = wmpc->next) {
                    if (wmpc->wmp_client_id == client_id)
                        break;
                }

                if (wmpc && modify_current_stream(wmpc, ratebuf))
                    wmpc->switch_pending = 1;
            }

            snprintf(msg, sizeof(msg), "POST command not handled");
            c->stream = 0;
            goto send_error;
        }
        if (http_start_receive_data(c) < 0) {
            snprintf(msg, sizeof(msg), "could not open feed");
            goto send_error;
        }
        c->http_error = 0;
        c->state = HTTPSTATE_RECEIVE_DATA;
        return 0;
    }

#ifdef DEBUG_WMP
    if (strcmp(stream->filename + strlen(stream->filename) - 4, ".asf") == 0)
        http_log("\nGot request:\n%s\n", c->buffer);
#endif

    if (c->stream->stream_type == STREAM_TYPE_STATUS)
        goto send_status;

    /* open input stream */
    if (open_input_stream(c, info) < 0) {
        snprintf(msg, sizeof(msg), "Input stream corresponding to '%s' not found", url);
        goto send_error;
    }

    /* prepare http header */
    q = c->buffer;
    q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "HTTP/1.0 200 OK\r\n");
    mime_type = c->stream->fmt->mime_type;
    if (!mime_type)
        mime_type = "application/x-octet-stream";
    q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Pragma: no-cache\r\n");

    /* for asf, we need extra headers */
    if (!strcmp(c->stream->fmt->name,"asf_stream")) {
        /* Need to allocate a client id */

        c->wmp_client_id = av_random(&random_state) & 0x7fffffff;

        q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Server: Cougar 4.1.0.3923\r\nCache-Control: no-cache\r\nPragma: client-id=%d\r\nPragma: features=\"broadcast\"\r\n", c->wmp_client_id);
    }
    q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Content-Type: %s\r\n", mime_type);
    q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "\r\n");

    /* prepare output buffer */
    c->http_error = 0;
    c->buffer_ptr = c->buffer;
    c->buffer_end = q;
    c->state = HTTPSTATE_SEND_HEADER;
    return 0;
 send_error:
    c->http_error = 404;
    q = c->buffer;
    q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "HTTP/1.0 404 Not Found\r\n");
    q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Content-type: %s\r\n", "text/html");
    q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "\r\n");
    q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "<HTML>\n");
    q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "<HEAD><TITLE>404 Not Found</TITLE></HEAD>\n");
    q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "<BODY>%s</BODY>\n", msg);
    q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "</HTML>\n");

    /* prepare output buffer */
    c->buffer_ptr = c->buffer;
    c->buffer_end = q;
    c->state = HTTPSTATE_SEND_HEADER;
    return 0;
 send_status:
    compute_status(c);
    c->http_error = 200; /* horrible : we use this value to avoid
                            going to the send data state */
    c->state = HTTPSTATE_SEND_HEADER;
    return 0;
}

static void fmt_bytecount(ByteIOContext *pb, int64_t count)
{
    static const char *suffix = " kMGTP";
    const char *s;

    for (s = suffix; count >= 100000 && s[1]; count /= 1000, s++);

    url_fprintf(pb, "%"PRId64"%c", count, *s);
}

static void compute_status(HTTPContext *c)
{
    HTTPContext *c1;
    FFStream *stream;
    char *p;
    time_t ti;
    int i, len;
    ByteIOContext *pb;

    if (url_open_dyn_buf(&pb) < 0) {
        /* XXX: return an error ? */
        c->buffer_ptr = c->buffer;
        c->buffer_end = c->buffer;
        return;
    }

    url_fprintf(pb, "HTTP/1.0 200 OK\r\n");
    url_fprintf(pb, "Content-type: %s\r\n", "text/html");
    url_fprintf(pb, "Pragma: no-cache\r\n");
    url_fprintf(pb, "\r\n");

    url_fprintf(pb, "<HEAD><TITLE>%s Status</TITLE>\n", program_name);
    if (c->stream->feed_filename[0])
        url_fprintf(pb, "<link rel=\"shortcut icon\" href=\"%s\">\n", c->stream->feed_filename);
    url_fprintf(pb, "</HEAD>\n<BODY>");
    url_fprintf(pb, "<H1>%s Status</H1>\n", program_name);
    /* format status */
    url_fprintf(pb, "<H2>Available Streams</H2>\n");
    url_fprintf(pb, "<TABLE cellspacing=0 cellpadding=4>\n");
    url_fprintf(pb, "<TR><Th valign=top>Path<th align=left>Served<br>Conns<Th><br>bytes<Th valign=top>Format<Th>Bit rate<br>kbits/s<Th align=left>Video<br>kbits/s<th><br>Codec<Th align=left>Audio<br>kbits/s<th><br>Codec<Th align=left valign=top>Feed\n");
    stream = first_stream;
    while (stream != NULL) {
        char sfilename[1024];
        char *eosf;

        if (stream->feed != stream) {
            av_strlcpy(sfilename, stream->filename, sizeof(sfilename) - 10);
            eosf = sfilename + strlen(sfilename);
            if (eosf - sfilename >= 4) {
                if (strcmp(eosf - 4, ".asf") == 0)
                    strcpy(eosf - 4, ".asx");
                else if (strcmp(eosf - 3, ".rm") == 0)
                    strcpy(eosf - 3, ".ram");
                else if (stream->fmt && !strcmp(stream->fmt->name, "rtp")) {
                    /* generate a sample RTSP director if
                       unicast. Generate an SDP redirector if
                       multicast */
                    eosf = strrchr(sfilename, '.');
                    if (!eosf)
                        eosf = sfilename + strlen(sfilename);
                    if (stream->is_multicast)
                        strcpy(eosf, ".sdp");
                    else
                        strcpy(eosf, ".rtsp");
                }
            }

            url_fprintf(pb, "<TR><TD><A HREF=\"/%s\">%s</A> ",
                         sfilename, stream->filename);
            url_fprintf(pb, "<td align=right> %d <td align=right> ",
                        stream->conns_served);
            fmt_bytecount(pb, stream->bytes_served);
            switch(stream->stream_type) {
            case STREAM_TYPE_LIVE: {
                    int audio_bit_rate = 0;
                    int video_bit_rate = 0;
                    const char *audio_codec_name = "";
                    const char *video_codec_name = "";
                    const char *audio_codec_name_extra = "";
                    const char *video_codec_name_extra = "";

                    for(i=0;i<stream->nb_streams;i++) {
                        AVStream *st = stream->streams[i];
                        AVCodec *codec = avcodec_find_encoder(st->codec->codec_id);
                        switch(st->codec->codec_type) {
                        case CODEC_TYPE_AUDIO:
                            audio_bit_rate += st->codec->bit_rate;
                            if (codec) {
                                if (*audio_codec_name)
                                    audio_codec_name_extra = "...";
                                audio_codec_name = codec->name;
                            }
                            break;
                        case CODEC_TYPE_VIDEO:
                            video_bit_rate += st->codec->bit_rate;
                            if (codec) {
                                if (*video_codec_name)
                                    video_codec_name_extra = "...";
                                video_codec_name = codec->name;
                            }
                            break;
                        case CODEC_TYPE_DATA:
                            video_bit_rate += st->codec->bit_rate;
                            break;
                        default:
                            abort();
                        }
                    }
                    url_fprintf(pb, "<TD align=center> %s <TD align=right> %d <TD align=right> %d <TD> %s %s <TD align=right> %d <TD> %s %s",
                                 stream->fmt->name,
                                 stream->bandwidth,
                                 video_bit_rate / 1000, video_codec_name, video_codec_name_extra,
                                 audio_bit_rate / 1000, audio_codec_name, audio_codec_name_extra);
                    if (stream->feed)
                        url_fprintf(pb, "<TD>%s", stream->feed->filename);
                    else
                        url_fprintf(pb, "<TD>%s", stream->feed_filename);
                    url_fprintf(pb, "\n");
                }
                break;
            default:
                url_fprintf(pb, "<TD align=center> - <TD align=right> - <TD align=right> - <td><td align=right> - <TD>\n");
                break;
            }
        }
        stream = stream->next;
    }
    url_fprintf(pb, "</TABLE>\n");

    stream = first_stream;
    while (stream != NULL) {
        if (stream->feed == stream) {
            url_fprintf(pb, "<h2>Feed %s</h2>", stream->filename);
            if (stream->pid) {
                url_fprintf(pb, "Running as pid %d.\n", stream->pid);

#if defined(linux) && !defined(CONFIG_NOCUTILS)
                {
                    FILE *pid_stat;
                    char ps_cmd[64];

                    /* This is somewhat linux specific I guess */
                    snprintf(ps_cmd, sizeof(ps_cmd),
                             "ps -o \"%%cpu,cputime\" --no-headers %d",
                             stream->pid);

                    pid_stat = popen(ps_cmd, "r");
                    if (pid_stat) {
                        char cpuperc[10];
                        char cpuused[64];

                        if (fscanf(pid_stat, "%10s %64s", cpuperc,
                                   cpuused) == 2) {
                            url_fprintf(pb, "Currently using %s%% of the cpu. Total time used %s.\n",
                                         cpuperc, cpuused);
                        }
                        fclose(pid_stat);
                    }
                }
#endif

                url_fprintf(pb, "<p>");
            }
            url_fprintf(pb, "<table cellspacing=0 cellpadding=4><tr><th>Stream<th>type<th>kbits/s<th align=left>codec<th align=left>Parameters\n");

            for (i = 0; i < stream->nb_streams; i++) {
                AVStream *st = stream->streams[i];
                AVCodec *codec = avcodec_find_encoder(st->codec->codec_id);
                const char *type = "unknown";
                char parameters[64];

                parameters[0] = 0;

                switch(st->codec->codec_type) {
                case CODEC_TYPE_AUDIO:
                    type = "audio";
                    snprintf(parameters, sizeof(parameters), "%d channel(s), %d Hz", st->codec->channels, st->codec->sample_rate);
                    break;
                case CODEC_TYPE_VIDEO:
                    type = "video";
                    snprintf(parameters, sizeof(parameters), "%dx%d, q=%d-%d, fps=%d", st->codec->width, st->codec->height,
                                st->codec->qmin, st->codec->qmax, st->codec->time_base.den / st->codec->time_base.num);
                    break;
                default:
                    abort();
                }
                url_fprintf(pb, "<tr><td align=right>%d<td>%s<td align=right>%d<td>%s<td>%s\n",
                        i, type, st->codec->bit_rate/1000, codec ? codec->name : "", parameters);
            }
            url_fprintf(pb, "</table>\n");

        }
        stream = stream->next;
    }

#if 0
    {
        float avg;
        AVCodecContext *enc;
        char buf[1024];

        /* feed status */
        stream = first_feed;
        while (stream != NULL) {
            url_fprintf(pb, "<H1>Feed '%s'</H1>\n", stream->filename);
            url_fprintf(pb, "<TABLE>\n");
            url_fprintf(pb, "<TR><TD>Parameters<TD>Frame count<TD>Size<TD>Avg bitrate (kbits/s)\n");
            for(i=0;i<stream->nb_streams;i++) {
                AVStream *st = stream->streams[i];
                FeedData *fdata = st->priv_data;
                enc = st->codec;

                avcodec_string(buf, sizeof(buf), enc);
                avg = fdata->avg_frame_size * (float)enc->rate * 8.0;
                if (enc->codec->type == CODEC_TYPE_AUDIO && enc->frame_size > 0)
                    avg /= enc->frame_size;
                url_fprintf(pb, "<TR><TD>%s <TD> %d <TD> %"PRId64" <TD> %0.1f\n",
                             buf, enc->frame_number, fdata->data_count, avg / 1000.0);
            }
            url_fprintf(pb, "</TABLE>\n");
            stream = stream->next_feed;
        }
    }
#endif

    /* connection status */
    url_fprintf(pb, "<H2>Connection Status</H2>\n");

    url_fprintf(pb, "Number of connections: %d / %d<BR>\n",
                 nb_connections, nb_max_connections);

    url_fprintf(pb, "Bandwidth in use: %lldk / %lldk<BR>\n",
                 current_bandwidth, max_bandwidth);

    url_fprintf(pb, "<TABLE>\n");
    url_fprintf(pb, "<TR><th>#<th>File<th>IP<th>Proto<th>State<th>Target bits/sec<th>Actual bits/sec<th>Bytes transferred\n");
    c1 = first_http_ctx;
    i = 0;
    while (c1 != NULL) {
        int bitrate;
        int j;

        bitrate = 0;
        if (c1->stream) {
            for (j = 0; j < c1->stream->nb_streams; j++) {
                if (!c1->stream->feed)
                    bitrate += c1->stream->streams[j]->codec->bit_rate;
                else if (c1->feed_streams[j] >= 0)
                    bitrate += c1->stream->feed->streams[c1->feed_streams[j]]->codec->bit_rate;
            }
        }

        i++;
        p = inet_ntoa(c1->from_addr.sin_addr);
        url_fprintf(pb, "<TR><TD><B>%d</B><TD>%s%s<TD>%s<TD>%s<TD>%s<td align=right>",
                    i,
                    c1->stream ? c1->stream->filename : "",
                    c1->state == HTTPSTATE_RECEIVE_DATA ? "(input)" : "",
                    p,
                    c1->protocol,
                    http_state[c1->state]);
        fmt_bytecount(pb, bitrate);
        url_fprintf(pb, "<td align=right>");
        fmt_bytecount(pb, compute_datarate(&c1->datarate, c1->data_count) * 8);
        url_fprintf(pb, "<td align=right>");
        fmt_bytecount(pb, c1->data_count);
        url_fprintf(pb, "\n");
        c1 = c1->next;
    }
    url_fprintf(pb, "</TABLE>\n");

    /* date */
    ti = time(NULL);
    p = ctime(&ti);
    url_fprintf(pb, "<HR size=1 noshade>Generated at %s", p);
    url_fprintf(pb, "</BODY>\n</HTML>\n");

    len = url_close_dyn_buf(pb, &c->pb_buffer);
    c->buffer_ptr = c->pb_buffer;
    c->buffer_end = c->pb_buffer + len;
}

/* check if the parser needs to be opened for stream i */
static void open_parser(AVFormatContext *s, int i)
{
    AVStream *st = s->streams[i];
    AVCodec *codec;

    if (!st->codec->codec) {
        codec = avcodec_find_decoder(st->codec->codec_id);
        if (codec && (codec->capabilities & CODEC_CAP_PARSE_ONLY)) {
            st->codec->parse_only = 1;
            if (avcodec_open(st->codec, codec) < 0)
                st->codec->parse_only = 0;
        }
    }
}

static int open_input_stream(HTTPContext *c, const char *info)
{
    char buf[128];
    char input_filename[1024];
    AVFormatContext *s;
    int buf_size, i, ret;
    int64_t stream_pos;

    /* find file name */
    if (c->stream->feed) {
        strcpy(input_filename, c->stream->feed->feed_filename);
        buf_size = FFM_PACKET_SIZE;
        /* compute position (absolute time) */
        if (find_info_tag(buf, sizeof(buf), "date", info)) {
            stream_pos = parse_date(buf, 0);
            if (stream_pos == INT64_MIN)
                return -1;
        } else if (find_info_tag(buf, sizeof(buf), "buffer", info)) {
            int prebuffer = strtol(buf, 0, 10);
            stream_pos = av_gettime() - prebuffer * (int64_t)1000000;
        } else
            stream_pos = av_gettime() - c->stream->prebuffer * (int64_t)1000;
    } else {
        strcpy(input_filename, c->stream->feed_filename);
        buf_size = 0;
        /* compute position (relative time) */
        if (find_info_tag(buf, sizeof(buf), "date", info)) {
            stream_pos = parse_date(buf, 1);
            if (stream_pos == INT64_MIN)
                return -1;
        } else
            stream_pos = 0;
    }
    if (input_filename[0] == '\0')
        return -1;

#if 0
    { time_t when = stream_pos / 1000000;
    http_log("Stream pos = %"PRId64", time=%s", stream_pos, ctime(&when));
    }
#endif

    /* open stream */
    if ((ret = av_open_input_file(&s, input_filename, c->stream->ifmt,
                                  buf_size, c->stream->ap_in)) < 0) {
        http_log("could not open %s: %d\n", input_filename, ret);
        return -1;
    }
    s->flags |= AVFMT_FLAG_GENPTS;
    c->fmt_in = s;
    av_find_stream_info(c->fmt_in);

    /* open each parser */
    for(i=0;i<s->nb_streams;i++)
        open_parser(s, i);

    /* choose stream as clock source (we favorize video stream if
       present) for packet sending */
    c->pts_stream_index = 0;
    for(i=0;i<c->stream->nb_streams;i++) {
        if (c->pts_stream_index == 0 &&
            c->stream->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO) {
            c->pts_stream_index = i;
        }
    }

#if 1
    if (c->fmt_in->iformat->read_seek)
        av_seek_frame(c->fmt_in, -1, stream_pos, 0);
#endif
    /* set the start time (needed for maxtime and RTP packet timing) */
    c->start_time = cur_time;
    c->first_pts = AV_NOPTS_VALUE;
    return 0;
}

/* return the server clock (in us) */