Revert "webrtcbin: fix msid line and allow customization"

This reverts commit 3cad3455377d5a22faa138d9df840257059776c8.

That commit was breaking the association between an audio and
a video track in the standard case.

In practice, to support carrying separate MediaStream, we are
going a way to map what MediaStreamTrack belong to what MediaStream,
but that will require some thinking about the API.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2023>

subprojects/gst-plugins-bad/ext/webrtc/gstwebrtcbin.c

@@ -2724,23 +2724,6 @@ typedef struct
   WebRTCTransceiver *trans;
 } RtxSsrcData;
 
-/* https://tools.ietf.org/html/draft-ietf-mmusic-msid-16 */
-static gchar *
-_construct_msid (WebRTCTransceiver * trans, guint ssrc)
-{
-  gchar *ret;
-
-  if (trans->msid_appdata) {
-    ret =
-        g_strdup_printf ("%u msid:%s %s", ssrc, GST_OBJECT_NAME (trans),
-        trans->msid_appdata);
-  } else {
-    ret = g_strdup_printf ("%u msid:%s", ssrc, GST_OBJECT_NAME (trans));
-  }
-
-  return ret;
-}
-
 static gboolean
 _media_add_rtx_ssrc (GQuark field_id, const GValue * value, RtxSsrcData * data)
 {
@@ -2752,8 +2735,10 @@ _media_add_rtx_ssrc (GQuark field_id, const GValue * value, RtxSsrcData * data)
   /* http://www.freesoft.org/CIE/RFC/1889/24.htm */
   cname = gst_structure_get_string (sdes, "cname");
 
-  str = _construct_msid (data->trans, g_value_get_uint (value));
-
+  /* https://tools.ietf.org/html/draft-ietf-mmusic-msid-16 */
+  str =
+      g_strdup_printf ("%u msid:%s %s", g_value_get_uint (value),
+      cname, GST_OBJECT_NAME (data->trans));
   gst_sdp_media_add_attribute (data->media, "ssrc", str);
   g_free (str);
 
@@ -2790,8 +2775,10 @@ _media_add_ssrcs (GstSDPMedia * media, GstCaps * caps, GstWebRTCBin * webrtc,
     if (gst_structure_get_uint (s, "ssrc", &ssrc)) {
       gchar *str;
 
-      str = _construct_msid (trans, ssrc);
-
+      /* https://tools.ietf.org/html/draft-ietf-mmusic-msid-16 */
+      str =
+          g_strdup_printf ("%u msid:%s %s", ssrc, cname,
+          GST_OBJECT_NAME (trans));
       gst_sdp_media_add_attribute (media, "ssrc", str);
       g_free (str);
 

subprojects/gst-plugins-bad/ext/webrtc/webrtctransceiver.c

@@ -38,7 +38,6 @@ G_DEFINE_TYPE_WITH_CODE (WebRTCTransceiver, webrtc_transceiver,
 #define DEFAULT_FEC_TYPE GST_WEBRTC_FEC_TYPE_NONE
 #define DEFAULT_DO_NACK FALSE
 #define DEFAULT_FEC_PERCENTAGE 100
-#define DEFAULT_MSID_APPDATA NULL
 
 enum
 {
@@ -47,7 +46,6 @@ enum
   PROP_FEC_TYPE,
   PROP_FEC_PERCENTAGE,
   PROP_DO_NACK,
-  PROP_MSID_APPDATA,
 };
 
 void
@@ -114,22 +112,6 @@ webrtc_transceiver_set_property (GObject * object, guint prop_id,
     case PROP_FEC_PERCENTAGE:
       trans->fec_percentage = g_value_get_uint (value);
       break;
-    case PROP_MSID_APPDATA:
-    {
-      gchar *new_msid_appdata = g_value_dup_string (value);
-
-      if (new_msid_appdata && strlen (new_msid_appdata) > 64) {
-        g_warning ("Msid appdata exceeds 64 characters: %s", new_msid_appdata);
-        g_free (new_msid_appdata);
-      } else {
-        if (trans->msid_appdata)
-          g_free (trans->msid_appdata);
-
-        trans->msid_appdata = new_msid_appdata;
-      }
-
-      break;
-    }
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -154,9 +136,6 @@ webrtc_transceiver_get_property (GObject * object, guint prop_id,
     case PROP_FEC_PERCENTAGE:
       g_value_set_uint (value, trans->fec_percentage);
       break;
-    case PROP_MSID_APPDATA:
-      g_value_set_string (value, trans->msid_appdata);
-      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -173,7 +152,6 @@ webrtc_transceiver_finalize (GObject * object)
   gst_clear_object (&trans->ulpfecdec);
   gst_clear_object (&trans->ulpfecenc);
   gst_clear_object (&trans->redenc);
-  g_clear_pointer (&trans->msid_appdata, g_free);
 
   if (trans->local_rtx_ssrc_map)
     gst_structure_free (trans->local_rtx_ssrc_map);
@@ -225,23 +203,6 @@ webrtc_transceiver_class_init (WebRTCTransceiverClass * klass)
           "The amount of Forward Error Correction to apply",
           0, 100, DEFAULT_FEC_PERCENTAGE,
           G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
-
-  /**
-   * WebRTCTransceiver:msid-appdata:
-   *
-   * The appdata part of the media stream id, must not exceed 64 characters.
-   *
-   * Consult https://datatracker.ietf.org/doc/html/draft-ietf-mmusic-msid-16#section-2
-   * for more details.
-   *
-   * Since: 1.22
-   */
-  g_object_class_install_property (gobject_class,
-      PROP_MSID_APPDATA,
-      g_param_spec_string ("msid-appdata", "Msid appdata",
-          "The appdata part of the media stream id, must not exceed 64 characters",
-          NULL,
-          G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 }
 
 static void

subprojects/gst-plugins-bad/ext/webrtc/webrtctransceiver.h

@@ -47,7 +47,6 @@ struct _WebRTCTransceiver
   GstWebRTCFECType         fec_type;
   guint                    fec_percentage;
   gboolean                 do_nack;
-  gchar                   *msid_appdata;
 
   GstCaps                  *last_configured_caps;
 

subprojects/gst-plugins-bad/tests/check/elements/webrtcbin.c

@@ -4425,66 +4425,6 @@ GST_START_TEST (test_renego_rtx)
 
 GST_END_TEST;
 
-static void
-_check_msid_appdata (struct test_webrtc *t, GstElement * element,
-    GstWebRTCSessionDescription * desc, gpointer expected)
-{
-  guint i = 0;
-
-  for (i = 0; i < gst_sdp_message_medias_len (desc->sdp); i++) {
-    const GstSDPMedia *media = gst_sdp_message_get_media (desc->sdp, i);
-
-    if (g_strcmp0 (gst_sdp_media_get_media (media), "audio") == 0
-        || g_strcmp0 (gst_sdp_media_get_media (media), "video") == 0) {
-      int j;
-
-      for (j = 0; j < gst_sdp_media_attributes_len (media); j++) {
-        const GstSDPAttribute *attr = gst_sdp_media_get_attribute (media, j);
-
-        if (!g_strcmp0 (attr->key, "ssrc")) {
-          gchar **split = g_strsplit (attr->value, " ", 3);
-
-          fail_unless (g_strv_length (split) >= 2);
-
-          if (g_str_has_prefix (split[1], "msid:")) {
-            if (expected) {
-              fail_unless_equals_int (g_strv_length (split), 3);
-              fail_unless_equals_string (split[2], expected);
-            } else {
-              fail_unless_equals_int (g_strv_length (split), 2);
-            }
-          }
-
-          g_strfreev (split);
-        }
-      }
-    }
-  }
-}
-
-GST_START_TEST (test_msid_appdata)
-{
-  struct test_webrtc *t = create_audio_test ();
-  gchar *expected = g_strdup ("foobar");
-  GstWebRTCRTPTransceiver *trans;
-
-  VAL_SDP_INIT (offer, _check_msid_appdata, expected, NULL);
-  VAL_SDP_INIT (answer, _check_msid_appdata, expected, NULL);
-
-  g_signal_emit_by_name (t->webrtc1, "get-transceiver", 0, &trans);
-  g_object_set (trans, "msid-appdata", expected, NULL);
-  g_clear_object (&trans);
-
-  test_validate_sdp (t, &offer, &answer);
-
-  g_free (expected);
-
-  test_webrtc_free (t);
-}
-
-GST_END_TEST;
-
-
 static Suite *
 webrtcbin_suite (void)
 {
@@ -4540,7 +4480,6 @@ webrtcbin_suite (void)
     tcase_add_test (tc, test_codec_preferences_incompatible_extmaps);
     tcase_add_test (tc, test_codec_preferences_invalid_extmap);
     tcase_add_test (tc, test_renego_rtx);
-    tcase_add_test (tc, test_msid_appdata);
     if (sctpenc && sctpdec) {
       tcase_add_test (tc, test_data_channel_create);
       tcase_add_test (tc, test_data_channel_remote_notify);