sdp_parse_fmtp(&st->codec, p);
sdp_parse_fmtp(st, p);
static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,                           int letter, const char *buf){    RTSPState *rt = s->priv_data;    char buf1[64], st_type[64];    const char *p;    int codec_type, payload_type, i;    AVStream *st;    RTSPStream *rtsp_st;    struct in_addr sdp_ip;    int ttl;#ifdef DEBUG    printf("sdp: %c='%s'\n", letter, buf);#endif    p = buf;    switch(letter) {    case 'c':        get_word(buf1, sizeof(buf1), &p);        if (strcmp(buf1, "IN") != 0)            return;        get_word(buf1, sizeof(buf1), &p);        if (strcmp(buf1, "IP4") != 0)            return;        get_word_sep(buf1, sizeof(buf1), "/", &p);        if (inet_aton(buf1, &sdp_ip) == 0)            return;        ttl = 16;        if (*p == '/') {            p++;            get_word_sep(buf1, sizeof(buf1), "/", &p);            ttl = atoi(buf1);        }        if (s->nb_streams == 0) {            s1->default_ip = sdp_ip;            s1->default_ttl = ttl;        } else {            st = s->streams[s->nb_streams - 1];            rtsp_st = st->priv_data;            rtsp_st->sdp_ip = sdp_ip;            rtsp_st->sdp_ttl = ttl;        }        break;    case 's':        pstrcpy(s->title, sizeof(s->title), p);        break;    case 'i':        if (s->nb_streams == 0) {            pstrcpy(s->comment, sizeof(s->comment), p);            break;        }        break;    case 'm':        /* new stream */        get_word(st_type, sizeof(st_type), &p);        if (!strcmp(st_type, "audio")) {            codec_type = CODEC_TYPE_AUDIO;        } else if (!strcmp(st_type, "video")) {            codec_type = CODEC_TYPE_VIDEO;        } else {            return;        }        rtsp_st = av_mallocz(sizeof(RTSPStream));        if (!rtsp_st)            return;        rtsp_st->stream_index = -1;        dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);        rtsp_st->sdp_ip = s1->default_ip;        rtsp_st->sdp_ttl = s1->default_ttl;        get_word(buf1, sizeof(buf1), &p); /* port */        rtsp_st->sdp_port = atoi(buf1);        get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */                /* XXX: handle list of formats */        get_word(buf1, sizeof(buf1), &p); /* format list */        rtsp_st->sdp_payload_type = atoi(buf1);        if (rtsp_st->sdp_payload_type == RTP_PT_MPEG2TS) {            /* no corresponding stream */        } else {            st = av_new_stream(s, 0);            if (!st)                return;            st->priv_data = rtsp_st;            rtsp_st->stream_index = st->index;            st->codec.codec_type = codec_type;            if (rtsp_st->sdp_payload_type < 96) {                /* if standard payload type, we can find the codec right now */                rtp_get_codec_info(&st->codec, rtsp_st->sdp_payload_type);            }        }        /* put a default control url */        pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);        break;    case 'a':        if (strstart(p, "control:", &p) && s->nb_streams > 0) {            char proto[32];            /* get the control url */            st = s->streams[s->nb_streams - 1];            rtsp_st = st->priv_data;                        /* XXX: may need to add full url resolution */            url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);            if (proto[0] == '\0') {                /* relative control URL */                pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/");                pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);            } else {                pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);            }        } else if (strstart(p, "rtpmap:", &p)) {            /* NOTE: rtpmap is only supported AFTER the 'm=' tag */            get_word(buf1, sizeof(buf1), &p);             payload_type = atoi(buf1);            for(i = 0; i < s->nb_streams;i++) {                st = s->streams[i];                rtsp_st = st->priv_data;                if (rtsp_st->sdp_payload_type == payload_type) {                    sdp_parse_rtpmap(&st->codec, p);                }            }        } else if (strstart(p, "fmtp:", &p)) {            /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */            get_word(buf1, sizeof(buf1), &p);             payload_type = atoi(buf1);            for(i = 0; i < s->nb_streams;i++) {                st = s->streams[i];                rtsp_st = st->priv_data;                if (rtsp_st->sdp_payload_type == payload_type) {                    sdp_parse_fmtp(&st->codec, p);                }            }        }        break;    }}