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, 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; } }