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media-pipeline: Dump dot graph without GST_DEBUG_DUMP_DOT_DIR set

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gst_debug_bin_to_dot_file() NOOPs if GStreamer was initialized without
the enviroment variable GST_DEBUG_DUMP_DOT_DIR.

If SIGUSR2 was signalled we want to have a dot file dumped no matter
what. Functions for asynchronously writing the graph as obtained by
gst_debug_bin_dot_data() to a temporary file and print the path to
stdout.

Note: Usage of GST_DEBUG_BIN_DOT_FILE() on pipeline state change is left
as is, because we don't want to dump graphs for every change on every
pipeline.
This commit is contained in:
Evangelos Ribeiro Tzaras 2022-10-12 13:28:10 +02:00
parent 2eda998931
commit 25e5e01008
1 changed files with 112 additions and 3 deletions
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115
plugins/provider/sip/calls-sip-media-pipeline.c
View file

@ -1064,9 +1064,108 @@ calls_sip_media_pipeline_class_init (CallsSipMediaPipelineClass *klass)
}
static void
on_dump_data_written (GObject *source_object,
GAsyncResult *res,
gpointer userdata)
{
g_autoptr (GError) error = NULL;
g_autofree char *dot_data = userdata;
GOutputStream *stream = G_OUTPUT_STREAM (source_object);
gsize n_expected = GPOINTER_TO_SIZE (dot_data);
gsize n_written;
n_written = g_output_stream_write_finish (stream, res, &error);
if (n_written != n_expected) {
/* this is not an error
* TODO write the rest
* note: maybe easier with GBytes because of keeping track of
* dot_data reference ? */
g_warning ("Expected to write %" G_GSIZE_FORMAT
" but only wrote %" G_GSIZE_FORMAT " bytes",
n_expected,
n_written);
}
if (error) {
g_warning ("Error while trying to dump dot graph to file: %s",
error->message);
}
}
static void
on_dump_file_created (GObject *source_object,
GAsyncResult *res,
gpointer userdata)
{
g_autoptr (GError) error = NULL;
g_autoptr (GFileOutputStream) stream = NULL;
GFile *file = G_FILE (source_object);
char *dot_data = userdata;
stream = g_file_create_finish (G_FILE (source_object), res, &error);
if (!stream) {
g_autofree char *path = g_file_get_path (file);
if (error->code == G_IO_ERROR_EXISTS) {
/* we could potentially also g_file_replace() here,
* but no immediate need to bother right now */
}
g_warning ("Cannot create file %s: %s", path, error->message);
g_free (dot_data);
return;
}
g_output_stream_write_async (G_OUTPUT_STREAM (stream),
dot_data,
strlen (dot_data),
G_PRIORITY_DEFAULT,
NULL,
on_dump_data_written,
dot_data);
}
/* we need dump_pipeline_graph_to_path() because both
* GST_DEBUG_BIN_TO_DOT_FILE*() and gst_debug_bin_to_dot_file*()
* require GStreamer being initialized with environment variable
* GST_DEBUG_DOT_DIR set.
*/
static void
dump_pipeline_graph_to_path (GstBin *bin,
const char *full_path)
{
g_autoptr (GFile) file = NULL;
char *dot_data;
g_print ("Dumping pipeline graph to '%s'", full_path);
dot_data = gst_debug_bin_to_dot_data (bin,
GST_DEBUG_GRAPH_SHOW_VERBOSE);
file = g_file_new_for_path (full_path);
/* try creating, and if it fails with IO_ERROR_EXISTS try replacing the file */
g_file_create_async (file,
G_PRIORITY_DEFAULT,
G_FILE_CREATE_PRIVATE,
NULL,
on_dump_file_created,
dot_data);
}
static gboolean
usr2_handler (CallsSipMediaPipeline *self)
{
g_autofree char *tmp_dir = NULL;
g_autofree char *file_path = NULL;
g_print ("playing: %d\n"
"paused: %d\n"
"stopped: %d\n"
@ -1078,9 +1177,19 @@ usr2_handler (CallsSipMediaPipeline *self)
self->use_srtp ? EL_ALL_SRTP : EL_ALL_RTP,
self->state);
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (self->pipeline),
GST_DEBUG_GRAPH_SHOW_ALL,
"usr2-debug");
/* TODO once we require GLib >= 2.74
* we can open a temp file more easily with g_file_new_tmp_async/finish()
g_file_new_tmp_async ("calls-pipeline-XXXXXX",
G_PRIORITY_DEFAULT,
NULL,
on_dump_file_created,
dot_data);
*/
tmp_dir = g_mkdtemp ("calls-pipeline-XXXXXX");
file_path = g_strconcat (tmp_dir, G_DIR_SEPARATOR_S, "usr2-debug.dot", NULL);
dump_pipeline_graph_to_path (GST_BIN (self->pipeline), file_path);
return G_SOURCE_CONTINUE;
}