Merge changes from topic 'sdp_api_adjustments'

* changes:
  SDP: Set the remote c= line in RTP instance.
  SDP: Add t= line in sdp_create_from_state()
  stream: Ignore declined streams for some topology calls.

include/asterisk/sdp_state.h

@@ -146,6 +146,10 @@ const void *ast_sdp_state_get_local_sdp_impl(struct ast_sdp_state *sdp_state);
  * \param sdp_state
  * \param sdp
  *
+ * \note It is assumed that the passed in SDP has been checked for sanity
+ * already.  e.g., There are no syntax errors, a c= line is reachable for
+ * each m= line, etc...
+ *
  * \retval 0 Success
  * \retval non-0 Failure
  *

include/asterisk/stream.h

@@ -401,8 +401,11 @@ struct ast_stream_topology *ast_stream_topology_create_from_format_cap(
 	struct ast_format_cap *cap);
 
 /*!
- * \brief A helper function that, given a stream topology, creates a format
- * capabilities structure containing all formats from all streams.
+ * \brief Create a format capabilities structure representing the topology.
+ *
+ * \details
+ * A helper function that, given a stream topology, creates a format
+ * capabilities structure containing all formats from all active streams.
  *
  * \param topology The topology of streams
  *
@@ -417,7 +420,7 @@ struct ast_format_cap *ast_format_cap_from_stream_topology(
 	struct ast_stream_topology *topology);
 
 /*!
- * \brief Gets the first stream of a specific type from the topology
+ * \brief Gets the first active stream of a specific type from the topology
  *
  * \param topology The topology of streams
  * \param type The media type

main/sdp_state.c

@@ -997,11 +997,32 @@ static void update_rtp_after_merge(const struct ast_sdp_state *state,
 	const struct ast_sdp *remote_sdp,
 	const struct ast_sdp_m_line *remote_m_line)
 {
+	struct ast_sdp_c_line *c_line;
+	struct ast_sockaddr *addrs;
+
 	if (!rtp) {
 		/* This is a dummy stream */
 		return;
 	}
 
+	c_line = remote_m_line->c_line;
+	if (!c_line) {
+		c_line = remote_sdp->c_line;
+	}
+	/*
+	 * There must be a c= line somewhere but that would be an error by
+	 * the far end that should have been caught by a validation check
+	 * before we processed the SDP.
+	 */
+	ast_assert(c_line != NULL);
+
+	if (ast_sockaddr_resolve(&addrs, c_line->address, PARSE_PORT_FORBID, AST_AF_UNSPEC) > 0) {
+		/* Apply connection information to the RTP instance */
+		ast_sockaddr_set_port(addrs, remote_m_line->port);
+		ast_rtp_instance_set_remote_address(rtp->instance, addrs);
+		ast_free(addrs);
+	}
+
 	if (ast_sdp_options_get_rtcp_mux(options)
 		&& ast_sdp_m_find_attribute(remote_m_line, "rtcp-mux", -1)) {
 		ast_rtp_instance_set_prop(rtp->instance, AST_RTP_PROPERTY_RTCP,
@@ -1011,10 +1032,8 @@ static void update_rtp_after_merge(const struct ast_sdp_state *state,
 			AST_RTP_INSTANCE_RTCP_STANDARD);
 	}
 
-	if (ast_sdp_options_get_ice(options) == AST_SDP_ICE_ENABLED_STANDARD) {
 	update_ice(state, rtp->instance, options, remote_sdp, remote_m_line);
 }
-}
 
 /*!
  * \brief Update UDPTL instances based on merged SDPs
@@ -1066,12 +1085,19 @@ static void update_udptl_after_merge(const struct ast_sdp_state *state, struct s
 		}
 	}
 
-	c_line = remote_sdp->c_line;
-	if (remote_m_line->c_line) {
 	c_line = remote_m_line->c_line;
+	if (!c_line) {
+		c_line = remote_sdp->c_line;
 	}
+	/*
+	 * There must be a c= line somewhere but that would be an error by
+	 * the far end that should have been caught by a validation check
+	 * before we processed the SDP.
+	 */
+	ast_assert(c_line != NULL);
 
 	if (ast_sockaddr_resolve(&addrs, c_line->address, PARSE_PORT_FORBID, AST_AF_UNSPEC) > 0) {
+		/* Apply connection information to the UDPTL instance */
 		ast_sockaddr_set_port(addrs, remote_m_line->port);
 		ast_udptl_set_peer(udptl->instance, addrs);
 		ast_free(addrs);
@@ -1734,13 +1760,16 @@ static struct ast_sdp *sdp_create_from_state(const struct ast_sdp_state *sdp_sta
 	if (!c_line) {
 		goto error;
 	}
-
 	s_line = ast_sdp_s_alloc(options->sdpsession);
 	if (!s_line) {
 		goto error;
 	}
+	t_line = ast_sdp_t_alloc(0, 0);
+	if (!t_line) {
+		goto error;
+	}
 
-	sdp = ast_sdp_alloc(o_line, c_line, s_line, NULL);
+	sdp = ast_sdp_alloc(o_line, c_line, s_line, t_line);
 	if (!sdp) {
 		goto error;
 	}

main/stream.c

@@ -437,9 +437,11 @@ struct ast_format_cap *ast_format_cap_from_stream_topology(
 	}
 
 	for (i = 0; i < AST_VECTOR_SIZE(&topology->streams); i++) {
-		struct ast_stream *stream = AST_VECTOR_GET(&topology->streams, i);
+		struct ast_stream *stream;
 
-		if (!stream->formats) {
+		stream = AST_VECTOR_GET(&topology->streams, i);
+		if (!stream->formats
+			|| stream->state == AST_STREAM_STATE_REMOVED) {
 			continue;
 		}
 
@@ -458,9 +460,11 @@ struct ast_stream *ast_stream_topology_get_first_stream_by_type(
 	ast_assert(topology != NULL);
 
 	for (i = 0; i < AST_VECTOR_SIZE(&topology->streams); i++) {
-		struct ast_stream *stream = AST_VECTOR_GET(&topology->streams, i);
+		struct ast_stream *stream;
 
-		if (stream->type == type) {
+		stream = AST_VECTOR_GET(&topology->streams, i);
+		if (stream->type == type
+			&& stream->state != AST_STREAM_STATE_REMOVED) {
 			return stream;
 		}
 	}

tests/test_stream.c

@@ -755,7 +755,12 @@ AST_TEST_DEFINE(stream_topology_create_from_format_cap)
 AST_TEST_DEFINE(stream_topology_get_first_stream_by_type)
 {
 	RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
-	struct ast_stream *first_stream, *second_stream, *third_stream, *fourth_stream;
+	struct ast_stream *first_stream;
+	struct ast_stream *second_stream;
+	struct ast_stream *third_stream;
+	struct ast_stream *fourth_stream;
+	struct ast_stream *fifth_stream;
+	struct ast_stream *sixth_stream;
 
 	switch (cmd) {
 	case TEST_INIT:
@@ -780,6 +785,7 @@ AST_TEST_DEFINE(stream_topology_get_first_stream_by_type)
 		ast_test_status_update(test, "Failed to create an audio stream for testing stream topology\n");
 		return AST_TEST_FAIL;
 	}
+	ast_stream_set_state(first_stream, AST_STREAM_STATE_REMOVED);
 
 	if (ast_stream_topology_append_stream(topology, first_stream) == -1) {
 		ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
@@ -799,9 +805,9 @@ AST_TEST_DEFINE(stream_topology_get_first_stream_by_type)
 		return AST_TEST_FAIL;
 	}
 
-	third_stream = ast_stream_alloc("video", AST_MEDIA_TYPE_VIDEO);
+	third_stream = ast_stream_alloc("audio3", AST_MEDIA_TYPE_AUDIO);
 	if (!third_stream) {
-		ast_test_status_update(test, "Failed to create a video stream for testing stream topology\n");
+		ast_test_status_update(test, "Failed to create a third audio stream for testing stream topology\n");
 		return AST_TEST_FAIL;
 	}
 
@@ -811,11 +817,12 @@ AST_TEST_DEFINE(stream_topology_get_first_stream_by_type)
 		return AST_TEST_FAIL;
 	}
 
-	fourth_stream = ast_stream_alloc("video2", AST_MEDIA_TYPE_VIDEO);
+	fourth_stream = ast_stream_alloc("video", AST_MEDIA_TYPE_VIDEO);
 	if (!fourth_stream) {
-		ast_test_status_update(test, "Failed to create a second video stream for testing stream topology\n");
+		ast_test_status_update(test, "Failed to create a video stream for testing stream topology\n");
 		return AST_TEST_FAIL;
 	}
+	ast_stream_set_state(fourth_stream, AST_STREAM_STATE_REMOVED);
 
 	if (ast_stream_topology_append_stream(topology, fourth_stream) == -1) {
 		ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
@@ -823,12 +830,36 @@ AST_TEST_DEFINE(stream_topology_get_first_stream_by_type)
 		return AST_TEST_FAIL;
 	}
 
-	if (ast_stream_topology_get_first_stream_by_type(topology, AST_MEDIA_TYPE_AUDIO) != first_stream) {
+	fifth_stream = ast_stream_alloc("video2", AST_MEDIA_TYPE_VIDEO);
+	if (!fifth_stream) {
+		ast_test_status_update(test, "Failed to create a second video stream for testing stream topology\n");
+		return AST_TEST_FAIL;
+	}
+
+	if (ast_stream_topology_append_stream(topology, fifth_stream) == -1) {
+		ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
+		ast_stream_free(fifth_stream);
+		return AST_TEST_FAIL;
+	}
+
+	sixth_stream = ast_stream_alloc("video3", AST_MEDIA_TYPE_VIDEO);
+	if (!sixth_stream) {
+		ast_test_status_update(test, "Failed to create a third video stream for testing stream topology\n");
+		return AST_TEST_FAIL;
+	}
+
+	if (ast_stream_topology_append_stream(topology, sixth_stream) == -1) {
+		ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
+		ast_stream_free(sixth_stream);
+		return AST_TEST_FAIL;
+	}
+
+	if (ast_stream_topology_get_first_stream_by_type(topology, AST_MEDIA_TYPE_AUDIO) != second_stream) {
 		ast_test_status_update(test, "Retrieved first audio stream from topology but it is not the correct one\n");
 		return AST_TEST_FAIL;
 	}
 
-	if (ast_stream_topology_get_first_stream_by_type(topology, AST_MEDIA_TYPE_VIDEO) != third_stream) {
+	if (ast_stream_topology_get_first_stream_by_type(topology, AST_MEDIA_TYPE_VIDEO) != fifth_stream) {
 		ast_test_status_update(test, "Retrieved first video stream from topology but it is not the correct one\n");
 		return AST_TEST_FAIL;
 	}
@@ -1918,6 +1949,8 @@ AST_TEST_DEFINE(format_cap_from_stream_topology)
 	RAII_VAR(struct ast_format_cap *, caps, NULL, ao2_cleanup);
 	RAII_VAR(struct ast_format_cap *, stream_caps, NULL, ao2_cleanup);
 	struct ast_stream_topology *topology;
+	struct ast_stream *stream;
+	struct ast_format_cap *new_cap;
 
 	switch (cmd) {
 	case TEST_INIT:
@@ -1938,12 +1971,12 @@ AST_TEST_DEFINE(format_cap_from_stream_topology)
 	}
 
 	if (ast_format_cap_append(caps, ast_format_ulaw, 0)) {
-		ast_test_status_update(test, "Failed to append a ulaw format to capabilities for channel nativeformats\n");
+		ast_test_status_update(test, "Failed to append ulaw format to capabilities\n");
 		return AST_TEST_FAIL;
 	}
 
 	if (ast_format_cap_append(caps, ast_format_h264, 0)) {
-		ast_test_status_update(test, "Failed to append an h264 format to capabilities for channel nativeformats\n");
+		ast_test_status_update(test, "Failed to append h264 format to capabilities\n");
 		return AST_TEST_FAIL;
 	}
 
@@ -1953,6 +1986,40 @@ AST_TEST_DEFINE(format_cap_from_stream_topology)
 		return AST_TEST_FAIL;
 	}
 
+	/*
+	 * Append declined stream with formats that should not be included
+	 * in combined topology caps.
+	 */
+	stream = ast_stream_alloc("audio", AST_MEDIA_TYPE_AUDIO);
+	if (!stream) {
+		ast_test_status_update(test, "Failed to create an audio stream for testing stream topology\n");
+		ast_stream_topology_free(topology);
+		return AST_TEST_FAIL;
+	}
+	ast_stream_set_state(stream, AST_STREAM_STATE_REMOVED);
+	new_cap = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
+	if (!new_cap) {
+		ast_test_status_update(test, "Could not allocate an empty format capabilities structure\n");
+		ast_stream_free(stream);
+		ast_stream_topology_free(topology);
+		return AST_TEST_FAIL;
+	}
+	if (ast_format_cap_append(new_cap, ast_format_alaw, 0)) {
+		ast_test_status_update(test, "Failed to append alaw format to capabilities\n");
+		ao2_cleanup(new_cap);
+		ast_stream_free(stream);
+		ast_stream_topology_free(topology);
+		return AST_TEST_FAIL;
+	}
+	ast_stream_set_formats(stream, new_cap);
+	ao2_cleanup(new_cap);
+	if (ast_stream_topology_append_stream(topology, stream) == -1) {
+		ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
+		ast_stream_free(stream);
+		ast_stream_topology_free(topology);
+		return AST_TEST_FAIL;
+	}
+
 	stream_caps = ast_format_cap_from_stream_topology(topology);
 	if (!stream_caps) {
 		ast_test_status_update(test, "Failed to create a format capabilities from a stream topology\n");