From: Victor Toso <me@xxxxxxxxxxxxxx>
On GST_MESSAGE_STREAM_START our stream is about to start and it seems
a good moment to debug GStreamer pipeline if requested.
That we can do with GST_DEBUG_BIN_TO_DOT_FILE() which iterates
recursively in the whole pipeline and generates a dot file with all
the information, the filename is 'spice-gtk-gst-pipeline-debug.dot'.
One can generate png image out of this dot file with the command:
dot -Tpng -oimage.png spice-gtk-gst-pipeline-debug.dot
Not that GST_DEBUG_BIN_TO_DOT_FILE() will only work if Gstreamer was
configured with --gst-enable-gst-debug and the environment variable
GST_DEBUG_DUMP_DOT_DIR was properly set.
Full example:
1) GST_DEBUG_DUMP_DOT_DIR=/tmp remote-viewer ...
2) dot -Tpng -oimage.png spice-gtk-gst-pipeline-debug.dot
Signed-off-by: Victor Toso <victortoso@xxxxxxxxxx>
Signed-off-by: Victor Toso <me@xxxxxxxxxxxxxx>
---
src/channel-display-gst.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/src/channel-display-gst.c b/src/channel-display-gst.c
index df58de3..04710e8 100644
--- a/src/channel-display-gst.c
+++ b/src/channel-display-gst.c
@@ -298,7 +298,8 @@ static gboolean handle_pipeline_message(GstBus *bus, GstMessage *msg, gpointer v
{
SpiceGstDecoder *decoder = video_decoder;
- if (GST_MESSAGE_TYPE(msg) == GST_MESSAGE_ERROR) {
+ switch(GST_MESSAGE_TYPE(msg)) {
+ case GST_MESSAGE_ERROR: {
GError *err = NULL;
gchar *debug_info = NULL;
gst_message_parse_error(msg, &err, &debug_info);
@@ -312,6 +313,18 @@ static gboolean handle_pipeline_message(GstBus *bus, GstMessage *msg, gpointer v
/* We won't be able to process any more frame anyway */
free_pipeline(decoder);
+ break;
+ }
+ case GST_MESSAGE_STREAM_START:
+ GST_DEBUG_BIN_TO_DOT_FILE(GST_BIN(decoder->pipeline),
+ GST_DEBUG_GRAPH_SHOW_ALL
+ | GST_DEBUG_GRAPH_SHOW_FULL_PARAMS
+ | GST_DEBUG_GRAPH_SHOW_STATES,
+ "spice-gtk-gst-pipeline-debug");
+ break;
+ default:
+ /* not being handled */
+ break;
}
return TRUE;
}
--
2.13.0
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