* Boston, MA 02110-1301, USA.
*/
-/**
- * SECTION:gsttracerutils
- * @short_description: Tracing subsystem
+/* Tracing subsystem:
*
* The tracing subsystem provides hooks in the core library and API for modules
* to attach to them.
*
* The user can activate tracers by setting the environment variable GST_TRACE
* to a ';' separated list of tracers.
+ *
+ * Note that instantiating tracers at runtime is possible but is not thread safe
+ * and needs to be done before any pipeline state is set to PAUSED.
*/
#define GST_USE_UNSTABLE_API
#include "gsttracerfactory.h"
#include "gsttracerutils.h"
-#ifndef GST_DISABLE_GST_DEBUG
+#ifndef GST_DISABLE_GST_TRACER_HOOKS
/* tracer quarks */
static const gchar *_quark_strings[] = {
"pad-push-pre", "pad-push-post", "pad-push-list-pre", "pad-push-list-post",
"pad-pull-range-pre", "pad-pull-range-post", "pad-push-event-pre",
- "pad-push-event-post", "element-post-message-pre",
- "element-post-message-post", "element-query-pre", "element-query-post"
+ "pad-push-event-post", "pad-query-pre", "pad-query-post",
+ "element-post-message-pre",
+ "element-post-message-post", "element-query-pre", "element-query-post",
+ "element-new", "element-add-pad", "element-remove-pad",
+ "bin-add-pre", "bin-add-post", "bin-remove-pre", "bin-remove-post",
+ "pad-link-pre", "pad-link-post", "pad-unlink-pre", "pad-unlink-post",
+ "element-change-state-pre", "element-change-state-post",
+ "mini-object-created", "mini-object-destroyed", "object-created",
+ "object-destroyed", "mini-object-reffed", "mini-object-unreffed",
+ "object-reffed", "object-unreffed",
};
GQuark _priv_gst_tracer_quark_table[GST_TRACER_QUARK_MAX];
gboolean _priv_tracer_enabled = FALSE;
GHashTable *_priv_tracers = NULL;
-typedef struct
-{
- GstTracer *tracer;
- GstTracerHookFunction func;
-} GstTracerHook;
-
/* Initialize the tracing system */
void
-_priv_gst_tracer_init (void)
+_priv_gst_tracing_init (void)
{
- const gchar *env = g_getenv ("GST_TRACE");
+ gint i = 0;
+ const gchar *env = g_getenv ("GST_TRACERS");
+
+ /* We initialize the tracer sub system even if the end
+ * user did not activate it through the env variable
+ * so that external tools can use it anyway */
+ GST_DEBUG ("Initializing GstTracer");
+ _priv_tracers = g_hash_table_new (NULL, NULL);
+
+ if (G_N_ELEMENTS (_quark_strings) != GST_TRACER_QUARK_MAX)
+ g_warning ("the quark table is not consistent! %d != %d",
+ (gint) G_N_ELEMENTS (_quark_strings), GST_TRACER_QUARK_MAX);
+
+ for (i = 0; i < GST_TRACER_QUARK_MAX; i++) {
+ _priv_gst_tracer_quark_table[i] =
+ g_quark_from_static_string (_quark_strings[i]);
+ }
if (env != NULL && *env != '\0') {
GstRegistry *registry = gst_registry_get ();
GstPluginFeature *feature;
GstTracerFactory *factory;
gchar **t = g_strsplit_set (env, ";", 0);
- gint i = 0;
gchar *params;
GST_INFO ("enabling tracers: '%s'", env);
-
- if (G_N_ELEMENTS (_quark_strings) != GST_TRACER_QUARK_MAX)
- g_warning ("the quark table is not consistent! %d != %d",
- (gint) G_N_ELEMENTS (_quark_strings), GST_TRACER_QUARK_MAX);
-
- for (i = 0; i < GST_TRACER_QUARK_MAX; i++) {
- _priv_gst_tracer_quark_table[i] =
- g_quark_from_static_string (_quark_strings[i]);
- }
-
- _priv_tracers = g_hash_table_new (NULL, NULL);
-
i = 0;
while (t[i]) {
// check t[i] for params
if ((feature = gst_registry_lookup_feature (registry, t[i]))) {
factory = GST_TRACER_FACTORY (gst_plugin_feature_load (feature));
if (factory) {
+ GstTracer *tracer;
+
GST_INFO_OBJECT (factory, "creating tracer: type-id=%u",
(guint) factory->type);
+ tracer = g_object_new (factory->type, "params", params, NULL);
+
+ /* Clear floating flag */
+ gst_object_ref_sink (tracer);
+
/* tracers register them self to the hooks */
- gst_object_unref (g_object_new (factory->type, "params", params,
- NULL));
+ gst_object_unref (tracer);
} else {
GST_WARNING_OBJECT (feature,
"loading plugin containing feature %s failed!", t[i]);
}
void
-_priv_gst_tracer_deinit (void)
+_priv_gst_tracing_deinit (void)
{
GList *h_list, *h_node, *t_node;
GstTracerHook *hook;
_priv_tracers = NULL;
}
-void
-gst_tracer_register_hook_id (GstTracer * tracer, GQuark detail,
- GstTracerHookFunction func)
+static void
+gst_tracing_register_hook_id (GstTracer * tracer, GQuark detail, GCallback func)
{
gpointer key = GINT_TO_POINTER (detail);
GList *list = g_hash_table_lookup (_priv_tracers, key);
_priv_tracer_enabled = TRUE;
}
+/**
+ * gst_tracing_register_hook:
+ * @tracer: the tracer
+ * @detail: the detailed hook
+ * @func: (scope async): the callback
+ *
+ * Register @func to be called when the trace hook @detail is getting invoked.
+ * Use %NULL for @detail to register to all hooks.
+ */
void
-gst_tracer_register_hook (GstTracer * tracer, const gchar * detail,
- GstTracerHookFunction func)
+gst_tracing_register_hook (GstTracer * tracer, const gchar * detail,
+ GCallback func)
{
- gst_tracer_register_hook_id (tracer, g_quark_try_string (detail), func);
+ gst_tracing_register_hook_id (tracer, g_quark_try_string (detail), func);
}
+#else /* !GST_DISABLE_GST_TRACER_HOOKS */
+
void
-gst_tracer_dispatch (GQuark detail, ...)
+gst_tracing_register_hook (GstTracer * tracer, const gchar * detail,
+ GCallback func)
{
- va_list var_args;
- gpointer key = GINT_TO_POINTER (detail);
- GList *list, *node;
- GstTracerHook *hook;
-
- list = g_hash_table_lookup (_priv_tracers, key);
- GST_DEBUG ("calling %d tracers for '%s'", g_list_length (list),
- g_quark_to_string (detail));
- for (node = list; node; node = g_list_next (node)) {
- hook = (GstTracerHook *) node->data;
- va_start (var_args, detail);
- hook->func (hook->tracer, var_args);
- va_end (var_args);
- }
- list = g_hash_table_lookup (_priv_tracers, NULL);
- GST_DEBUG ("calling %d tracers for '*'", g_list_length (list));
- for (node = list; node; node = g_list_next (node)) {
- hook = (GstTracerHook *) node->data;
- va_start (var_args, detail);
- hook->func (hook->tracer, var_args);
- va_end (var_args);
- }
}
-#endif /* GST_DISABLE_GST_DEBUG */
+#endif /* GST_DISABLE_GST_TRACER_HOOKS */
projects / platform / upstream / gstreamer.git / blobdiff