ffserver.c

    }
    
    /* test if stream is already set up */
    if (rtp_c->rtp_ctx[stream_index]) {
        rtsp_reply_error(c, RTSP_STATUS_STATE);
        return;
    }

    /* check transport */
    th = find_transport(h, rtp_c->rtp_protocol);
    if (!th || (th->protocol == RTSP_PROTOCOL_RTP_UDP && 
                th->client_port_min <= 0)) {
        rtsp_reply_error(c, RTSP_STATUS_TRANSPORT);
        return;
    }

    /* setup default options */
    setup.transport_option[0] = '\0';
    dest_addr = rtp_c->from_addr;
    dest_addr.sin_port = htons(th->client_port_min);
    
    /* add transport option if needed */
    if (ff_rtsp_callback) {
        setup.ipaddr = ntohl(dest_addr.sin_addr.s_addr);
        if (ff_rtsp_callback(RTSP_ACTION_SERVER_SETUP, rtp_c->session_id, 
                             (char *)&setup, sizeof(setup),
                             stream->rtsp_option) < 0) {
            rtsp_reply_error(c, RTSP_STATUS_TRANSPORT);
            return;
        }
        dest_addr.sin_addr.s_addr = htonl(setup.ipaddr);
    }
    
    /* setup stream */
    if (rtp_new_av_stream(rtp_c, stream_index, &dest_addr, c) < 0) {
        rtsp_reply_error(c, RTSP_STATUS_TRANSPORT);
        return;
    }

    /* now everything is OK, so we can send the connection parameters */
    rtsp_reply_header(c, RTSP_STATUS_OK);
    /* session ID */
    url_fprintf(c->pb, "Session: %s\r\n", rtp_c->session_id);

    switch(rtp_c->rtp_protocol) {
    case RTSP_PROTOCOL_RTP_UDP:
        port = rtp_get_local_port(rtp_c->rtp_handles[stream_index]);
        url_fprintf(c->pb, "Transport: RTP/AVP/UDP;unicast;"
                    "client_port=%d-%d;server_port=%d-%d",
                    th->client_port_min, th->client_port_min + 1,
                    port, port + 1);
        break;
    case RTSP_PROTOCOL_RTP_TCP:
        url_fprintf(c->pb, "Transport: RTP/AVP/TCP;interleaved=%d-%d",
                    stream_index * 2, stream_index * 2 + 1);
        break;
    default:
        break;
    }
    if (setup.transport_option[0] != '\0') {
        url_fprintf(c->pb, ";%s", setup.transport_option);
    }
    url_fprintf(c->pb, "\r\n");
    

    url_fprintf(c->pb, "\r\n");
}


/* find an rtp connection by using the session ID. Check consistency
   with filename */
static HTTPContext *find_rtp_session_with_url(const char *url, 
                                              const char *session_id)
{
    HTTPContext *rtp_c;
    char path1[1024];
    const char *path;
    char buf[1024];
    int s;

    rtp_c = find_rtp_session(session_id);
    if (!rtp_c)
        return NULL;

    /* find which url is asked */
    url_split(NULL, 0, NULL, 0, NULL, path1, sizeof(path1), url);
    path = path1;
    if (*path == '/')
        path++;
    if(!strcmp(path, rtp_c->stream->filename)) return rtp_c;
    for(s=0; s<rtp_c->stream->nb_streams; ++s) {
      snprintf(buf, sizeof(buf), "%s/streamid=%d",
        rtp_c->stream->filename, s);
      if(!strncmp(path, buf, sizeof(buf))) {
    // XXX: Should we reply with RTSP_STATUS_ONLY_AGGREGATE if nb_streams>1?
        return rtp_c;
      }
    }
    return NULL;
}

static void rtsp_cmd_play(HTTPContext *c, const char *url, RTSPHeader *h)
{
    HTTPContext *rtp_c;

    rtp_c = find_rtp_session_with_url(url, h->session_id);
    if (!rtp_c) {
        rtsp_reply_error(c, RTSP_STATUS_SESSION);
        return;
    }
    
    if (rtp_c->state != HTTPSTATE_SEND_DATA &&
        rtp_c->state != HTTPSTATE_WAIT_FEED &&
        rtp_c->state != HTTPSTATE_READY) {
        rtsp_reply_error(c, RTSP_STATUS_STATE);
        return;
    }

    rtp_c->state = HTTPSTATE_SEND_DATA;
    
    /* now everything is OK, so we can send the connection parameters */
    rtsp_reply_header(c, RTSP_STATUS_OK);
    /* session ID */
    url_fprintf(c->pb, "Session: %s\r\n", rtp_c->session_id);
    url_fprintf(c->pb, "\r\n");
}

static void rtsp_cmd_pause(HTTPContext *c, const char *url, RTSPHeader *h)
{
    HTTPContext *rtp_c;

    rtp_c = find_rtp_session_with_url(url, h->session_id);
    if (!rtp_c) {
        rtsp_reply_error(c, RTSP_STATUS_SESSION);
        return;
    }
    
    if (rtp_c->state != HTTPSTATE_SEND_DATA &&
        rtp_c->state != HTTPSTATE_WAIT_FEED) {
        rtsp_reply_error(c, RTSP_STATUS_STATE);
        return;
    }
    
    rtp_c->state = HTTPSTATE_READY;
    rtp_c->first_pts = AV_NOPTS_VALUE;
    /* now everything is OK, so we can send the connection parameters */
    rtsp_reply_header(c, RTSP_STATUS_OK);
    /* session ID */
    url_fprintf(c->pb, "Session: %s\r\n", rtp_c->session_id);
    url_fprintf(c->pb, "\r\n");
}

static void rtsp_cmd_teardown(HTTPContext *c, const char *url, RTSPHeader *h)
{
    HTTPContext *rtp_c;

    rtp_c = find_rtp_session_with_url(url, h->session_id);
    if (!rtp_c) {
        rtsp_reply_error(c, RTSP_STATUS_SESSION);
        return;
    }
    
    /* abort the session */
    close_connection(rtp_c);

    if (ff_rtsp_callback) {
        ff_rtsp_callback(RTSP_ACTION_SERVER_TEARDOWN, rtp_c->session_id, 
                         NULL, 0,
                         rtp_c->stream->rtsp_option);
    }

    /* now everything is OK, so we can send the connection parameters */
    rtsp_reply_header(c, RTSP_STATUS_OK);
    /* session ID */
    url_fprintf(c->pb, "Session: %s\r\n", rtp_c->session_id);
    url_fprintf(c->pb, "\r\n");
}


/********************************************************************/
/* RTP handling */

static HTTPContext *rtp_new_connection(struct sockaddr_in *from_addr, 
                                       FFStream *stream, const char *session_id,
                                       enum RTSPProtocol rtp_protocol)
{
    HTTPContext *c = NULL;
    const char *proto_str;
    
    /* XXX: should output a warning page when coming
       close to the connection limit */
    if (nb_connections >= nb_max_connections)
        goto fail;
    
    /* add a new connection */
    c = av_mallocz(sizeof(HTTPContext));
    if (!c)
        goto fail;
    
    c->fd = -1;
    c->poll_entry = NULL;
    c->from_addr = *from_addr;
    c->buffer_size = IOBUFFER_INIT_SIZE;
    c->buffer = av_malloc(c->buffer_size);
    if (!c->buffer)
        goto fail;
    nb_connections++;
    c->stream = stream;
    pstrcpy(c->session_id, sizeof(c->session_id), session_id);
    c->state = HTTPSTATE_READY;
    c->is_packetized = 1;
    c->rtp_protocol = rtp_protocol;

    /* protocol is shown in statistics */
    switch(c->rtp_protocol) {
    case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
        proto_str = "MCAST";
        break;
    case RTSP_PROTOCOL_RTP_UDP:
        proto_str = "UDP";
        break;
    case RTSP_PROTOCOL_RTP_TCP:
        proto_str = "TCP";
        break;
    default:
        proto_str = "???";
        break;
    }
    pstrcpy(c->protocol, sizeof(c->protocol), "RTP/");
    pstrcat(c->protocol, sizeof(c->protocol), proto_str);

    current_bandwidth += stream->bandwidth;

    c->next = first_http_ctx;
    first_http_ctx = c;
    return c;
        
 fail:
    if (c) {
        av_free(c->buffer);
        av_free(c);
    }
    return NULL;
}

/* add a new RTP stream in an RTP connection (used in RTSP SETUP
   command). If RTP/TCP protocol is used, TCP connection 'rtsp_c' is
   used. */
static int rtp_new_av_stream(HTTPContext *c, 
                             int stream_index, struct sockaddr_in *dest_addr,
                             HTTPContext *rtsp_c)
{
    AVFormatContext *ctx;
    AVStream *st;
    char *ipaddr;
    URLContext *h;
    uint8_t *dummy_buf;
    char buf2[32];
    int max_packet_size;
    
    /* now we can open the relevant output stream */
    ctx = av_mallocz(sizeof(AVFormatContext));
    if (!ctx)
        return -1;
    ctx->oformat = &rtp_mux;

    st = av_mallocz(sizeof(AVStream));
    if (!st)
        goto fail;
    ctx->nb_streams = 1;
    ctx->streams[0] = st;

    if (!c->stream->feed || 
        c->stream->feed == c->stream) {
        memcpy(st, c->stream->streams[stream_index], sizeof(AVStream));
    } else {
        memcpy(st, 
               c->stream->feed->streams[c->stream->feed_streams[stream_index]],
               sizeof(AVStream));
    }
    
    /* build destination RTP address */
    ipaddr = inet_ntoa(dest_addr->sin_addr);

    switch(c->rtp_protocol) {
    case RTSP_PROTOCOL_RTP_UDP:
    case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
        /* RTP/UDP case */
        
        /* XXX: also pass as parameter to function ? */
        if (c->stream->is_multicast) {
            int ttl;
            ttl = c->stream->multicast_ttl;
            if (!ttl)
                ttl = 16;
            snprintf(ctx->filename, sizeof(ctx->filename),
                     "rtp://%s:%d?multicast=1&ttl=%d", 
                     ipaddr, ntohs(dest_addr->sin_port), ttl);
        } else {
            snprintf(ctx->filename, sizeof(ctx->filename),
                     "rtp://%s:%d", ipaddr, ntohs(dest_addr->sin_port));
        }

        if (url_open(&h, ctx->filename, URL_WRONLY) < 0)
            goto fail;
        c->rtp_handles[stream_index] = h;
        max_packet_size = url_get_max_packet_size(h);
        break;
    case RTSP_PROTOCOL_RTP_TCP:
        /* RTP/TCP case */
        c->rtsp_c = rtsp_c;
        max_packet_size = RTSP_TCP_MAX_PACKET_SIZE;
        break;
    default:
        goto fail;
    }

    http_log("%s:%d - - [%s] \"PLAY %s/streamid=%d %s\"\n",
             ipaddr, ntohs(dest_addr->sin_port), 
             ctime1(buf2), 
             c->stream->filename, stream_index, c->protocol);

    /* normally, no packets should be output here, but the packet size may be checked */
    if (url_open_dyn_packet_buf(&ctx->pb, max_packet_size) < 0) {
        /* XXX: close stream */
        goto fail;
    }
    av_set_parameters(ctx, NULL);
    if (av_write_header(ctx) < 0) {
    fail:
        if (h)
            url_close(h);
        av_free(ctx);
        return -1;
    }
    url_close_dyn_buf(&ctx->pb, &dummy_buf);
    av_free(dummy_buf);
    
    c->rtp_ctx[stream_index] = ctx;
    return 0;
}

/********************************************************************/
/* ffserver initialization */

static AVStream *add_av_stream1(FFStream *stream, AVCodecContext *codec)
{
    AVStream *fst;

    fst = av_mallocz(sizeof(AVStream));
    if (!fst)
        return NULL;
    fst->priv_data = av_mallocz(sizeof(FeedData));
    memcpy(&fst->codec, codec, sizeof(AVCodecContext));
    fst->codec.coded_frame = &dummy_frame;
    stream->streams[stream->nb_streams++] = fst;
    return fst;
}

/* return the stream number in the feed */
static int add_av_stream(FFStream *feed, AVStream *st)
{
    AVStream *fst;
    AVCodecContext *av, *av1;
    int i;

    av = &st->codec;
    for(i=0;i<feed->nb_streams;i++) {
        st = feed->streams[i];
        av1 = &st->codec;
        if (av1->codec_id == av->codec_id &&
            av1->codec_type == av->codec_type &&
            av1->bit_rate == av->bit_rate) {

            switch(av->codec_type) {
            case CODEC_TYPE_AUDIO:
                if (av1->channels == av->channels &&
                    av1->sample_rate == av->sample_rate)
                    goto found;
                break;
            case CODEC_TYPE_VIDEO:
                if (av1->width == av->width &&
                    av1->height == av->height &&
                    av1->frame_rate == av->frame_rate &&
                    av1->frame_rate_base == av->frame_rate_base &&
                    av1->gop_size == av->gop_size)
                    goto found;
                break;
            default:
                av_abort();
            }
        }
    }
    
    fst = add_av_stream1(feed, av);
    if (!fst)
        return -1;
    return feed->nb_streams - 1;
 found:
    return i;
}

static void remove_stream(FFStream *stream)
{
    FFStream **ps;
    ps = &first_stream;
    while (*ps != NULL) {
        if (*ps == stream) {
            *ps = (*ps)->next;
        } else {
            ps = &(*ps)->next;
        }
    }
}

/* specific mpeg4 handling : we extract the raw parameters */
static void extract_mpeg4_header(AVFormatContext *infile)
{
    int mpeg4_count, i, size;
    AVPacket pkt;
    AVStream *st;
    const uint8_t *p;

    mpeg4_count = 0;
    for(i=0;i<infile->nb_streams;i++) {
        st = infile->streams[i];
        if (st->codec.codec_id == CODEC_ID_MPEG4 &&
            st->codec.extradata_size == 0) {
            mpeg4_count++;
        }
    }
    if (!mpeg4_count)
        return;

    printf("MPEG4 without extra data: trying to find header\n");
    while (mpeg4_count > 0) {
        if (av_read_packet(infile, &pkt) < 0)
            break;
        st = infile->streams[pkt.stream_index];
        if (st->codec.codec_id == CODEC_ID_MPEG4 &&
            st->codec.extradata_size == 0) {
            av_freep(&st->codec.extradata);
            /* fill extradata with the header */
            /* XXX: we make hard suppositions here ! */
            p = pkt.data;
            while (p < pkt.data + pkt.size - 4) {
                /* stop when vop header is found */
                if (p[0] == 0x00 && p[1] == 0x00 && 
                    p[2] == 0x01 && p[3] == 0xb6) {
                    size = p - pkt.data;
                    //                    av_hex_dump(pkt.data, size);
                    st->codec.extradata = av_malloc(size);
                    st->codec.extradata_size = size;
                    memcpy(st->codec.extradata, pkt.data, size);
                    break;
                }
                p++;
            }
            mpeg4_count--;
        }
        av_free_packet(&pkt);
    }
}

/* compute the needed AVStream for each file */
static void build_file_streams(void)
{
    FFStream *stream, *stream_next;
    AVFormatContext *infile;
    int i;

    /* gather all streams */
    for(stream = first_stream; stream != NULL; stream = stream_next) {
        stream_next = stream->next;
        if (stream->stream_type == STREAM_TYPE_LIVE &&
            !stream->feed) {
            /* the stream comes from a file */
            /* try to open the file */
            /* open stream */
            if (av_open_input_file(&infile, stream->feed_filename, 
                                   NULL, 0, NULL) < 0) {
                http_log("%s not found", stream->feed_filename);
                /* remove stream (no need to spend more time on it) */
            fail:
                remove_stream(stream);
            } else {
                /* find all the AVStreams inside and reference them in
                   'stream' */
                if (av_find_stream_info(infile) < 0) {
                    http_log("Could not find codec parameters from '%s'", 
                             stream->feed_filename);
                    av_close_input_file(infile);
                    goto fail;
                }
                extract_mpeg4_header(infile);

                for(i=0;i<infile->nb_streams;i++) {
                    add_av_stream1(stream, &infile->streams[i]->codec);
                }
                av_close_input_file(infile);
            }
        }
    }
}

/* compute the needed AVStream for each feed */
static void build_feed_streams(void)
{
    FFStream *stream, *feed;
    int i;

    /* gather all streams */
    for(stream = first_stream; stream != NULL; stream = stream->next) {
        feed = stream->feed;
        if (feed) {
            if (!stream->is_feed) {
                /* we handle a stream coming from a feed */
                for(i=0;i<stream->nb_streams;i++) {
                    stream->feed_streams[i] = add_av_stream(feed, stream->streams[i]);
                }
            }
        }
    }

    /* gather all streams */
    for(stream = first_stream; stream != NULL; stream = stream->next) {
        feed = stream->feed;
        if (feed) {
            if (stream->is_feed) {
                for(i=0;i<stream->nb_streams;i++) {
                    stream->feed_streams[i] = i;
                }
            }
        }
    }

    /* create feed files if needed */
    for(feed = first_feed; feed != NULL; feed = feed->next_feed) {
        int fd;

        if (url_exist(feed->feed_filename)) {
            /* See if it matches */
            AVFormatContext *s;
            int matches = 0;

            if (av_open_input_file(&s, feed->feed_filename, NULL, FFM_PACKET_SIZE, NULL) >= 0) {
                /* Now see if it matches */
                if (s->nb_streams == feed->nb_streams) {
                    matches = 1;
                    for(i=0;i<s->nb_streams;i++) {
                        AVStream *sf, *ss;
                        sf = feed->streams[i];
                        ss = s->streams[i];

                        if (sf->index != ss->index ||
                            sf->id != ss->id) {
                            printf("Index & Id do not match for stream %d\n", i);
                            matches = 0;
                        } else {
                            AVCodecContext *ccf, *ccs;

                            ccf = &sf->codec;
                            ccs = &ss->codec;
#define CHECK_CODEC(x)  (ccf->x != ccs->x)

                            if (CHECK_CODEC(codec) || CHECK_CODEC(codec_type)) {
                                printf("Codecs do not match for stream %d\n", i);
                                matches = 0;
                            } else if (CHECK_CODEC(bit_rate) || CHECK_CODEC(flags)) {
                                printf("Codec bitrates do not match for stream %d\n", i);
                                matches = 0;
                            } else if (ccf->codec_type == CODEC_TYPE_VIDEO) {
                                if (CHECK_CODEC(frame_rate) ||
                                    CHECK_CODEC(frame_rate_base) ||
                                    CHECK_CODEC(width) ||
                                    CHECK_CODEC(height)) {
                                    printf("Codec width, height and framerate do not match for stream %d\n", i);
                                    matches = 0;
                                }
                            } else if (ccf->codec_type == CODEC_TYPE_AUDIO) {
                                if (CHECK_CODEC(sample_rate) ||
                                    CHECK_CODEC(channels) ||
                                    CHECK_CODEC(frame_size)) {
                                    printf("Codec sample_rate, channels, frame_size do not match for stream %d\n", i);
                                    matches = 0;
                                }
                            } else {
                                printf("Unknown codec type\n");
                                matches = 0;
                            }
                        }
                        if (!matches) {
                            break;
                        }
                    }
                } else {
                    printf("Deleting feed file '%s' as stream counts differ (%d != %d)\n",
                        feed->feed_filename, s->nb_streams, feed->nb_streams);
                }

                av_close_input_file(s);
            } else {
                printf("Deleting feed file '%s' as it appears to be corrupt\n",
                        feed->feed_filename);
            }
            if (!matches) {
                if (feed->readonly) {
                    printf("Unable to delete feed file '%s' as it is marked readonly\n",
                        feed->feed_filename);
                    exit(1);
                }
                unlink(feed->feed_filename);
            }
        }
        if (!url_exist(feed->feed_filename)) {
            AVFormatContext s1, *s = &s1;

            if (feed->readonly) {
                printf("Unable to create feed file '%s' as it is marked readonly\n",
                    feed->feed_filename);
                exit(1);
            }

            /* only write the header of the ffm file */
            if (url_fopen(&s->pb, feed->feed_filename, URL_WRONLY) < 0) {
                fprintf(stderr, "Could not open output feed file '%s'\n",
                        feed->feed_filename);
                exit(1);
            }
            s->oformat = feed->fmt;
            s->nb_streams = feed->nb_streams;
            for(i=0;i<s->nb_streams;i++) {
                AVStream *st;
                st = feed->streams[i];
                s->streams[i] = st;
            }
            av_set_parameters(s, NULL);
            av_write_header(s);
            /* XXX: need better api */
            av_freep(&s->priv_data);
            url_fclose(&s->pb);
        }
        /* get feed size and write index */
        fd = open(feed->feed_filename, O_RDONLY);
        if (fd < 0) {
            fprintf(stderr, "Could not open output feed file '%s'\n",
                    feed->feed_filename);
            exit(1);
        }

        feed->feed_write_index = ffm_read_write_index(fd);
        feed->feed_size = lseek(fd, 0, SEEK_END);
        /* ensure that we do not wrap before the end of file */
        if (feed->feed_max_size < feed->feed_size)
            feed->feed_max_size = feed->feed_size;

        close(fd);
    }
}

/* compute the bandwidth used by each stream */
static void compute_bandwidth(void)
{
    int bandwidth, i;
    FFStream *stream;
    
    for(stream = first_stream; stream != NULL; stream = stream->next) {
        bandwidth = 0;
        for(i=0;i<stream->nb_streams;i++) {
            AVStream *st = stream->streams[i];
            switch(st->codec.codec_type) {
            case CODEC_TYPE_AUDIO:
            case CODEC_TYPE_VIDEO:
                bandwidth += st->codec.bit_rate;
                break;
            default:
                break;
            }
        }
        stream->bandwidth = (bandwidth + 999) / 1000;
    }
}

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

    p = *pp;
    while (isspace(*p)) p++;
    q = buf;
    quote = 0;
    if (*p == '\"' || *p == '\'')
        quote = *p++;
    for(;;) {
        if (quote) {
            if (*p == quote)
                break;
        } else {
            if (isspace(*p))
                break;
        }
        if (*p == '\0')
            break;
        if ((q - buf) < buf_size - 1)
            *q++ = *p;
        p++;
    }
    *q = '\0';
    if (quote && *p == quote)
        p++;
    *pp = p;
}

/* add a codec and set the default parameters */
static void add_codec(FFStream *stream, AVCodecContext *av)
{
    AVStream *st;

    /* compute default parameters */
    switch(av->codec_type) {
    case CODEC_TYPE_AUDIO:
        if (av->bit_rate == 0)
            av->bit_rate = 64000;
        if (av->sample_rate == 0)
            av->sample_rate = 22050;
        if (av->channels == 0)
            av->channels = 1;
        break;
    case CODEC_TYPE_VIDEO:
        if (av->bit_rate == 0)
            av->bit_rate = 64000;
        if (av->frame_rate == 0){
            av->frame_rate = 5;
            av->frame_rate_base = 1;
        }
        if (av->width == 0 || av->height == 0) {
            av->width = 160;
            av->height = 128;
        }
        /* Bitrate tolerance is less for streaming */
        if (av->bit_rate_tolerance == 0)
            av->bit_rate_tolerance = av->bit_rate / 4;
        if (av->qmin == 0)
            av->qmin = 3;
        if (av->qmax == 0)
            av->qmax = 31;
        if (av->max_qdiff == 0)
            av->max_qdiff = 3;
        av->qcompress = 0.5;
        av->qblur = 0.5;

        if (!av->rc_eq)
            av->rc_eq = "tex^qComp";
        if (!av->i_quant_factor)
            av->i_quant_factor = -0.8;
        if (!av->b_quant_factor)
            av->b_quant_factor = 1.25;
        if (!av->b_quant_offset)
            av->b_quant_offset = 1.25;
        if (!av->rc_min_rate)
            av->rc_min_rate = av->bit_rate / 2;
        if (!av->rc_max_rate)
            av->rc_max_rate = av->bit_rate * 2;

        break;
    default:
        av_abort();
    }

    st = av_mallocz(sizeof(AVStream));
    if (!st)
        return;
    stream->streams[stream->nb_streams++] = st;
    memcpy(&st->codec, av, sizeof(AVCodecContext));
}

static int opt_audio_codec(const char *arg)
{
    AVCodec *p;

    p = first_avcodec;
    while (p) {
        if (!strcmp(p->name, arg) && p->type == CODEC_TYPE_AUDIO)
            break;
        p = p->next;
    }
    if (p == NULL) {
        return CODEC_ID_NONE;
    }

    return p->id;
}

static int opt_video_codec(const char *arg)
{
    AVCodec *p;

    p = first_avcodec;
    while (p) {
        if (!strcmp(p->name, arg) && p->type == CODEC_TYPE_VIDEO)
            break;
        p = p->next;
    }
    if (p == NULL) {
        return CODEC_ID_NONE;
    }

    return p->id;
}

/* simplistic plugin support */

#ifdef CONFIG_HAVE_DLOPEN
void load_module(const char *filename)
{
    void *dll;
    void (*init_func)(void);
    dll = dlopen(filename, RTLD_NOW);
    if (!dll) {
        fprintf(stderr, "Could not load module '%s' - %s\n",
                filename, dlerror());
        return;
    }
    
    init_func = dlsym(dll, "ffserver_module_init");
    if (!init_func) {
        fprintf(stderr, 
                "%s: init function 'ffserver_module_init()' not found\n",
                filename);
        dlclose(dll);
    }

    init_func();
}
#endif

static int parse_ffconfig(const char *filename)
{
    FILE *f;
    char line[1024];
    char cmd[64];
    char arg[1024];
    const char *p;
    int val, errors, line_num;
    FFStream **last_stream, *stream, *redirect;
    FFStream **last_feed, *feed;
    AVCodecContext audio_enc, video_enc;
    int audio_id, video_id;

    f = fopen(filename, "r");
    if (!f) {
        perror(filename);
        return -1;
    }
    
    errors = 0;
    line_num = 0;
    first_stream = NULL;
    last_stream = &first_stream;
    first_feed = NULL;
    last_feed = &first_feed;
    stream = NULL;
    feed = NULL;
    redirect = NULL;
    audio_id = CODEC_ID_NONE;
    video_id = CODEC_ID_NONE;
    for(;;) {
        if (fgets(line, sizeof(line), f) == NULL)
            break;
        line_num++;
        p = line;
        while (isspace(*p)) 
            p++;
        if (*p == '\0' || *p == '#')
            continue;

        get_arg(cmd, sizeof(cmd), &p);
        
        if (!strcasecmp(cmd, "Port")) {
            get_arg(arg, sizeof(arg), &p);
            my_http_addr.sin_port = htons (atoi(arg));
        } else if (!strcasecmp(cmd, "BindAddress")) {
            get_arg(arg, sizeof(arg), &p);
            if (!inet_aton(arg, &my_http_addr.sin_addr)) {
                fprintf(stderr, "%s:%d: Invalid IP address: %s\n", 
                        filename, line_num, arg);
                errors++;
            }
        } else if (!strcasecmp(cmd, "NoDaemon")) {
            ffserver_daemon = 0;
        } else if (!strcasecmp(cmd, "RTSPPort")) {
            get_arg(arg, sizeof(arg), &p);
            my_rtsp_addr.sin_port = htons (atoi(arg));
        } else if (!strcasecmp(cmd, "RTSPBindAddress")) {
            get_arg(arg, sizeof(arg), &p);
            if (!inet_aton(arg, &my_rtsp_addr.sin_addr)) {
                fprintf(stderr, "%s:%d: Invalid IP address: %s\n", 
                        filename, line_num, arg);
                errors++;
            }
        } else if (!strcasecmp(cmd, "MaxClients")) {
            get_arg(arg, sizeof(arg), &p);
            val = atoi(arg);
            if (val < 1 || val > HTTP_MAX_CONNECTIONS) {
                fprintf(stderr, "%s:%d: Invalid MaxClients: %s\n", 
                        filename, line_num, arg);
                errors++;
            } else {
                nb_max_connections = val;
            }
        } else if (!strcasecmp(cmd, "MaxBandwidth")) {
            get_arg(arg, sizeof(arg), &p);
            val = atoi(arg);
            if (val < 10 || val > 100000) {
                fprintf(stderr, "%s:%d: Invalid MaxBandwidth: %s\n", 
                        filename, line_num, arg);
                errors++;
            } else {
                max_bandwidth = val;
            }
        } else if (!strcasecmp(cmd, "CustomLog")) {
            get_arg(logfilename, sizeof(logfilename), &p);
        } else if (!strcasecmp(cmd, "<Feed")) {
            /*********************************************/
            /* Feed related options */
            char *q;
            if (stream || feed) {
                fprintf(stderr, "%s:%d: Already in a tag\n",
                        filename, line_num);
            } else {
                feed = av_mallocz(sizeof(FFStream));
                /* add in stream list */
                *last_stream = feed;
                last_stream = &feed->next;
                /* add in feed list */
                *last_feed = feed;
                last_feed = &feed->next_feed;
                
                get_arg(feed->filename, sizeof(feed->filename), &p);
                q = strrchr(feed->filename, '>');
                if (*q)
                    *q = '\0';
                feed->fmt = guess_format("ffm", NULL, NULL);
                /* defaut feed file */
                snprintf(feed->feed_filename, sizeof(feed->feed_filename),
                         "/tmp/%s.ffm", feed->filename);
                feed->feed_max_size = 5 * 1024 * 1024;
                feed->is_feed = 1;
                feed->feed = feed; /* self feeding :-) */
            }
        } else if (!strcasecmp(cmd, "Launch")) {
            if (feed) {
                int i;

                feed->child_argv = (char **) av_mallocz(64 * sizeof(char *));

                feed->child_argv[0] = av_malloc(7);
                strcpy(feed->child_argv[0], "ffmpeg");

                for (i = 1; i < 62; i++) {
                    char argbuf[256];

                    get_arg(argbuf, sizeof(argbuf), &p);
                    if (!argbuf[0])
                        break;

                    feed->child_argv[i] = av_malloc(strlen(argbuf) + 1);
                    strcpy(feed->child_argv[i], argbuf);
                }

                feed->child_argv[i] = av_malloc(30 + strlen(feed->filename));

                snprintf(feed->child_argv[i], 256, "http://127.0.0.1:%d/%s", 
                    ntohs(my_http_addr.sin_port), feed->filename);
            }
        } else if (!strcasecmp(cmd, "ReadOnlyFile")) {
            if (feed) {
                get_arg(feed->feed_filename, sizeof(feed->feed_filename), &p);
                feed->readonly = 1;
            } else if (stream) {
                get_arg(stream->feed_filename, sizeof(stream->feed_filename), &p);
            }
        } else if (!strcasecmp(cmd, "File")) {
            if (feed) {
                get_arg(feed->feed_filename, sizeof(feed->feed_filename), &p);
            } else if (stream) {
                get_arg(stream->feed_filename, sizeof(stream->feed_filename), &p);
            }
        } else if (!strcasecmp(cmd, "FileMaxSize")) {
            if (feed) {
                const char *p1;
                double fsize;

                get_arg(arg, sizeof(arg), &p);
                p1 = arg;
                fsize = strtod(p1, (char **)&p1);
                switch(toupper(*p1)) {
                case 'K':