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gst-launch: Add GstContext support

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gst-launch will collect all the contexts from the pipeline elements
and update the overall pipeline context with it.
This commit is contained in:
Sebastian Dröge 2013-04-17 13:47:35 +02:00
parent f5f0dd50c8
commit 8f8036f344
1 changed files with 42 additions and 0 deletions
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42
tools/gst-launch.c
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@ -480,6 +480,18 @@ intr_handler (gpointer user_data)
#endif /* G_OS_UNIX */
static gboolean
merge_structures (GQuark field_id, const GValue * value, gpointer user_data)
{
GstStructure *s2 = user_data;
/* Copy all fields that are not set yet */
if (!gst_structure_id_has_field (s2, field_id))
gst_structure_id_set_value (s2, field_id, value);
return TRUE;
}
/* returns ELR_ERROR if there was an error
* or ELR_INTERRUPT if we caught a keyboard interrupt
* or ELR_NO_ERROR otherwise. */
@ -792,6 +804,36 @@ event_loop (GstElement * pipeline, gboolean blocking, gboolean do_progress,
}
break;
}
case GST_MESSAGE_HAVE_CONTEXT:{
GstContext *context1, *context2;
gchar *context_str;
gst_message_parse_have_context (message, &context1);
context_str =
gst_structure_to_string (gst_context_get_structure (context1));
PRINT (_("Got context from element '%s': %s\n"),
GST_ELEMENT_NAME (GST_MESSAGE_SRC (message)), context_str);
g_free (context_str);
context2 = gst_element_get_context (pipeline);
if (context2) {
GstStructure *s1, *s2;
/* Merge structures */
context2 = gst_context_make_writable (context2);
s1 = gst_context_get_structure (context1);
s2 = gst_context_get_structure (context2);
gst_structure_foreach (s1, merge_structures, s2);
gst_element_set_context (pipeline, context2);
gst_context_unref (context2);
} else {
/* Copy over the context */
gst_element_set_context (pipeline, context1);
}
gst_context_unref (context1);
break;
}
default:
/* just be quiet by default */
break;