core: Show streams in "core show channel".

The "core show channel" CLI command will now output the streams
present on the channel with their details.

ASTERISK-26811

Change-Id: I9c95b57aa09415005f0677a1949a0feb07e4987a

include/asterisk/stream.h

@@ -190,6 +190,17 @@ enum ast_stream_state ast_stream_get_state(const struct ast_stream *stream);
  */
 void ast_stream_set_state(struct ast_stream *stream, enum ast_stream_state state);
 
+/*!
+ * \brief Convert the state of a stream into a string
+ *
+ * \param state The stream state
+ *
+ * \return The state of the stream in string format
+ *
+ * \since 15
+ */
+const char *ast_stream_state2str(enum ast_stream_state state);
+
 /*!
  * \brief Get the position of the stream in the topology
  *

main/cli.c

@@ -61,6 +61,7 @@
 #include "asterisk/stasis_channels.h"
 #include "asterisk/stasis_bridges.h"
 #include "asterisk/vector.h"
+#include "asterisk/stream.h"
 
 /*!
  * \brief List of restrictions per user.
@@ -1542,6 +1543,7 @@ static char *handle_showchan(struct ast_cli_entry *e, int cmd, struct ast_cli_ar
 	struct ast_bridge *bridge;
 	ast_callid callid;
 	char callid_buf[32];
+	int stream_num;
 
 	switch (cmd) {
 	case CLI_INIT:
@@ -1668,6 +1670,7 @@ static char *handle_showchan(struct ast_cli_entry *e, int cmd, struct ast_cli_ar
 		S_OR(ast_channel_data(chan), "(Empty)"),
 		S_OR(callid_buf, "(None)")
 		);
+
 	ast_str_append(&output, 0, "      Variables:\n");
 
 	AST_LIST_TRAVERSE(ast_channel_varshead(chan), var, entries) {
@@ -1679,6 +1682,22 @@ static char *handle_showchan(struct ast_cli_entry *e, int cmd, struct ast_cli_ar
 		ast_str_append(&output, 0, "  CDR Variables:\n%s\n", ast_str_buffer(obuf));
 	}
 
+	ast_str_append(&output, 0, " -- Streams --\n");
+	for (stream_num = 0; stream_num < ast_stream_topology_get_count(ast_channel_get_stream_topology(chan)); stream_num++) {
+		struct ast_stream *stream = ast_stream_topology_get_stream(ast_channel_get_stream_topology(chan), stream_num);
+
+		ast_str_append(&output, 0,
+			"Name: %s\n"
+			"    Type: %s\n"
+			"    State: %s\n"
+			"    Formats: %s\n",
+			ast_stream_get_name(stream),
+			ast_codec_media_type2str(ast_stream_get_type(stream)),
+			ast_stream_state2str(ast_stream_get_state(stream)),
+			ast_format_cap_get_names(ast_stream_get_formats(stream), &codec_buf)
+			);
+	}
+
 	ast_channel_unlock(chan);
 
 	ast_cli(a->fd, "%s", ast_str_buffer(output));

main/stream.c

@@ -168,6 +168,24 @@ void ast_stream_set_state(struct ast_stream *stream, enum ast_stream_state state
 	stream->state = state;
 }
 
+const char *ast_stream_state2str(enum ast_stream_state state)
+{
+	switch (state) {
+	case AST_STREAM_STATE_REMOVED:
+		return "removed";
+	case AST_STREAM_STATE_SENDRECV:
+		return "sendrecv";
+	case AST_STREAM_STATE_SENDONLY:
+		return "sendonly";
+	case AST_STREAM_STATE_RECVONLY:
+		return "recvonly";
+	case AST_STREAM_STATE_INACTIVE:
+		return "inactive";
+	default:
+		return "<unknown>";
+	}
+}
+
 int ast_stream_get_position(const struct ast_stream *stream)
 {
 	ast_assert(stream != NULL);