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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2025-03-30 12:49:40 +00:00
sdp: make 1 media line per profile
If we have multiple profiles (AVP or AVPF) for a stream, make one m= line in the SDP for each profile. The client is then supposed to pick one of the profiles in the SETUP request. Because the m= lines have the same pt, the client also knows that only 1 option is possible.
This commit is contained in:
Wim Taymans
parent
4b74afcc78
commit
dffdbbf090
1 changed files with 183 additions and 137 deletions
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@ -70,6 +70,178 @@ update_sdp_from_tags (GstRTSPStream * stream, GstSDPMedia * stream_media)
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gst_object_unref (src_pad);
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}
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static void
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make_media (GstSDPMessage * sdp, GstSDPInfo * info, GstRTSPMedia * media,
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GstRTSPStream * stream, GstStructure * s, GstRTSPProfile profile)
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{
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GstSDPMedia *smedia;
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const gchar *caps_str, *caps_enc, *caps_params;
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gchar *tmp;
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gint caps_pt, caps_rate;
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guint n_fields, j;
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gboolean first;
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GString *fmtp;
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GstRTSPLowerTrans ltrans;
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GSocketFamily family;
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const gchar *addrtype, *proto;
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gchar *address;
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guint ttl;
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gst_sdp_media_new (&smedia);
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/* get media type and payload for the m= line */
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caps_str = gst_structure_get_string (s, "media");
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gst_sdp_media_set_media (smedia, caps_str);
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gst_structure_get_int (s, "payload", &caps_pt);
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tmp = g_strdup_printf ("%d", caps_pt);
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gst_sdp_media_add_format (smedia, tmp);
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g_free (tmp);
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gst_sdp_media_set_port_info (smedia, 0, 1);
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switch (profile) {
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case GST_RTSP_PROFILE_AVP:
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proto = "RTP/AVP";
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break;
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case GST_RTSP_PROFILE_AVPF:
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proto = "RTP/AVPF";
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break;
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case GST_RTSP_PROFILE_SAVP:
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proto = "RTP/SAVP";
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break;
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case GST_RTSP_PROFILE_SAVPF:
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proto = "RTP/SAVPF";
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break;
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default:
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proto = "udp";
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break;
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}
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gst_sdp_media_set_proto (smedia, proto);
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if (info->is_ipv6) {
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addrtype = "IP6";
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family = G_SOCKET_FAMILY_IPV6;
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} else {
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addrtype = "IP4";
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family = G_SOCKET_FAMILY_IPV4;
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}
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ltrans = gst_rtsp_stream_get_protocols (stream);
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if (ltrans == GST_RTSP_LOWER_TRANS_UDP_MCAST) {
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GstRTSPAddress *addr;
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addr = gst_rtsp_stream_get_multicast_address (stream, family);
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if (addr == NULL)
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goto no_multicast;
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address = g_strdup (addr->address);
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ttl = addr->ttl;
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gst_rtsp_address_free (addr);
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} else {
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ttl = 16;
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if (info->is_ipv6)
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address = g_strdup ("::");
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else
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address = g_strdup ("0.0.0.0");
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}
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/* for the c= line */
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gst_sdp_media_add_connection (smedia, "IN", addrtype, address, ttl, 1);
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g_free (address);
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/* get clock-rate, media type and params for the rtpmap attribute */
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gst_structure_get_int (s, "clock-rate", &caps_rate);
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caps_enc = gst_structure_get_string (s, "encoding-name");
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caps_params = gst_structure_get_string (s, "encoding-params");
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if (caps_enc) {
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if (caps_params)
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tmp = g_strdup_printf ("%d %s/%d/%s", caps_pt, caps_enc, caps_rate,
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caps_params);
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else
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tmp = g_strdup_printf ("%d %s/%d", caps_pt, caps_enc, caps_rate);
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gst_sdp_media_add_attribute (smedia, "rtpmap", tmp);
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g_free (tmp);
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}
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/* the config uri */
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tmp = gst_rtsp_stream_get_control (stream);
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gst_sdp_media_add_attribute (smedia, "control", tmp);
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g_free (tmp);
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/* collect all other properties and add them to fmtp or attributes */
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fmtp = g_string_new ("");
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g_string_append_printf (fmtp, "%d ", caps_pt);
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first = TRUE;
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n_fields = gst_structure_n_fields (s);
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for (j = 0; j < n_fields; j++) {
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const gchar *fname, *fval;
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fname = gst_structure_nth_field_name (s, j);
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/* filter out standard properties */
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if (!strcmp (fname, "media"))
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continue;
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if (!strcmp (fname, "payload"))
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continue;
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if (!strcmp (fname, "clock-rate"))
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continue;
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if (!strcmp (fname, "encoding-name"))
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continue;
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if (!strcmp (fname, "encoding-params"))
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continue;
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if (!strcmp (fname, "ssrc"))
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continue;
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if (!strcmp (fname, "clock-base"))
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continue;
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if (!strcmp (fname, "seqnum-base"))
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continue;
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if (g_str_has_prefix (fname, "a-")) {
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/* attribute */
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if ((fval = gst_structure_get_string (s, fname)))
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gst_sdp_media_add_attribute (smedia, fname + 2, fval);
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continue;
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}
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if (g_str_has_prefix (fname, "x-")) {
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/* attribute */
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if ((fval = gst_structure_get_string (s, fname)))
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gst_sdp_media_add_attribute (smedia, fname, fval);
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continue;
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}
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if ((fval = gst_structure_get_string (s, fname))) {
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g_string_append_printf (fmtp, "%s%s=%s", first ? "" : ";", fname, fval);
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first = FALSE;
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}
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}
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if (!first) {
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tmp = g_string_free (fmtp, FALSE);
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gst_sdp_media_add_attribute (smedia, "fmtp", tmp);
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g_free (tmp);
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} else {
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g_string_free (fmtp, TRUE);
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}
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update_sdp_from_tags (stream, smedia);
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gst_sdp_message_add_media (sdp, smedia);
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gst_sdp_media_free (smedia);
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return;
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/* ERRORS */
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no_multicast:
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{
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gst_sdp_media_free (smedia);
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g_warning ("ignoring stream %d without multicast address",
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gst_rtsp_stream_get_index (stream));
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return;
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}
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}
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/**
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* gst_rtsp_sdp_from_media:
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* @sdp: a #GstSDPMessage
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@ -99,20 +271,10 @@ gst_rtsp_sdp_from_media (GstSDPMessage * sdp, GstSDPInfo * info,
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for (i = 0; i < n_streams; i++) {
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GstRTSPStream *stream;
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GstSDPMedia *smedia;
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GstStructure *s;
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const gchar *caps_str, *caps_enc, *caps_params;
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gchar *tmp;
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gint caps_pt, caps_rate;
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guint n_fields, j;
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gboolean first;
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GString *fmtp;
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GstCaps *caps;
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GstRTSPLowerTrans ltrans;
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GSocketFamily family;
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const gchar *addrtype;
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gchar *address;
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guint ttl;
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GstStructure *s;
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GstRTSPProfile profiles;
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guint mask;
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stream = gst_rtsp_media_get_stream (media, i);
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caps = gst_rtsp_stream_get_caps (stream);
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@ -129,133 +291,17 @@ gst_rtsp_sdp_from_media (GstSDPMessage * sdp, GstSDPInfo * info,
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continue;
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}
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gst_sdp_media_new (&smedia);
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/* make a new media for each profile */
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profiles = gst_rtsp_stream_get_profiles (stream);
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mask = 1;
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while (profiles >= mask) {
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GstRTSPProfile prof = profiles & mask;
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/* get media type and payload for the m= line */
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caps_str = gst_structure_get_string (s, "media");
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gst_sdp_media_set_media (smedia, caps_str);
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if (prof)
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make_media (sdp, info, media, stream, s, prof);
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gst_structure_get_int (s, "payload", &caps_pt);
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tmp = g_strdup_printf ("%d", caps_pt);
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gst_sdp_media_add_format (smedia, tmp);
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g_free (tmp);
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gst_sdp_media_set_port_info (smedia, 0, 1);
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gst_sdp_media_set_proto (smedia, "RTP/AVP");
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if (info->is_ipv6) {
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addrtype = "IP6";
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family = G_SOCKET_FAMILY_IPV6;
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} else {
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addrtype = "IP4";
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family = G_SOCKET_FAMILY_IPV4;
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mask <<= 1;
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}
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ltrans = gst_rtsp_stream_get_protocols (stream);
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if (ltrans == GST_RTSP_LOWER_TRANS_UDP_MCAST) {
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GstRTSPAddress *addr;
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addr = gst_rtsp_stream_get_multicast_address (stream, family);
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if (addr == NULL) {
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gst_sdp_media_free (smedia);
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gst_caps_unref (caps);
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g_warning ("ignoring stream %d without multicast address", i);
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continue;
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}
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address = g_strdup (addr->address);
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ttl = addr->ttl;
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gst_rtsp_address_free (addr);
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} else {
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ttl = 16;
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if (info->is_ipv6)
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address = g_strdup ("::");
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else
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address = g_strdup ("0.0.0.0");
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}
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/* for the c= line */
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gst_sdp_media_add_connection (smedia, "IN", addrtype, address, ttl, 1);
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g_free (address);
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/* get clock-rate, media type and params for the rtpmap attribute */
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gst_structure_get_int (s, "clock-rate", &caps_rate);
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caps_enc = gst_structure_get_string (s, "encoding-name");
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caps_params = gst_structure_get_string (s, "encoding-params");
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if (caps_enc) {
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if (caps_params)
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tmp = g_strdup_printf ("%d %s/%d/%s", caps_pt, caps_enc, caps_rate,
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caps_params);
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else
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tmp = g_strdup_printf ("%d %s/%d", caps_pt, caps_enc, caps_rate);
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gst_sdp_media_add_attribute (smedia, "rtpmap", tmp);
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g_free (tmp);
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}
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/* the config uri */
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tmp = gst_rtsp_stream_get_control (stream);
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gst_sdp_media_add_attribute (smedia, "control", tmp);
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g_free (tmp);
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/* collect all other properties and add them to fmtp or attributes */
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fmtp = g_string_new ("");
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g_string_append_printf (fmtp, "%d ", caps_pt);
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first = TRUE;
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n_fields = gst_structure_n_fields (s);
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for (j = 0; j < n_fields; j++) {
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const gchar *fname, *fval;
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fname = gst_structure_nth_field_name (s, j);
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/* filter out standard properties */
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if (!strcmp (fname, "media"))
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continue;
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if (!strcmp (fname, "payload"))
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continue;
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if (!strcmp (fname, "clock-rate"))
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continue;
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if (!strcmp (fname, "encoding-name"))
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continue;
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if (!strcmp (fname, "encoding-params"))
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continue;
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if (!strcmp (fname, "ssrc"))
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continue;
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if (!strcmp (fname, "clock-base"))
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continue;
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if (!strcmp (fname, "seqnum-base"))
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continue;
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if (g_str_has_prefix (fname, "a-")) {
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/* attribute */
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if ((fval = gst_structure_get_string (s, fname)))
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gst_sdp_media_add_attribute (smedia, fname + 2, fval);
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continue;
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}
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if (g_str_has_prefix (fname, "x-")) {
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/* attribute */
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if ((fval = gst_structure_get_string (s, fname)))
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gst_sdp_media_add_attribute (smedia, fname, fval);
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continue;
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}
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if ((fval = gst_structure_get_string (s, fname))) {
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g_string_append_printf (fmtp, "%s%s=%s", first ? "" : ";", fname, fval);
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first = FALSE;
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}
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}
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if (!first) {
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tmp = g_string_free (fmtp, FALSE);
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gst_sdp_media_add_attribute (smedia, "fmtp", tmp);
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g_free (tmp);
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} else {
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g_string_free (fmtp, TRUE);
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}
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update_sdp_from_tags (stream, smedia);
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gst_sdp_message_add_media (sdp, smedia);
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gst_sdp_media_free (smedia);
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gst_caps_unref (caps);
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}
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