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fpsdisplay: various cleanups, docs and comments

Browse source 
Remove unused base_init. Add basic doc blob. Reuse query object. Rename
variables for clarity. Add comments and ToDos.
This commit is contained in:
Stefan Kost 2009-04-20 10:24:37 +03:00
parent 790235e29f
commit 193f638b0a
1 changed files with 54 additions and 67 deletions
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121
gst/debugutils/fpsdisplaysink.c
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@ -18,16 +18,24 @@
*/
/**
* SECTION:element-fpsdisplay
*
* Can display the current and average framerate as a testoverlay or on stdout.
*
* <refsect2>
* <title>Example launch lines</title>
* |[
* gst-launch videotestsrc ! fpsdisplaysink
* gst-launch videotestsrc ! fpsdisplaysink text-overlay=false
* gst-launch filesrc location=video.avi ! decodebin2 name=d ! queue ! fpsdisplaysink d. ! queue ! fakesink sync=true
* ]|
* </refsect2>
*/
/* FIXME:
* - do we need to proxy xoverlay stuff?
* - can we avoid the
* - can we avoid plugging the textoverlay?
* - we should use autovideosink as we are RANK_NONE and would not get plugged
* - gst-seek 15 "videotestsrc ! fpsdisplaysink" dies when closing gst-seek
* - if we make ourself RANK_PRIMARY+10 autovideosink asserts
*/
#ifdef HAVE_CONFIG_H
@ -41,9 +49,9 @@
#define DEFAULT_FONT "20"
static GstElementDetails fps_display_sink_details = {
"Wrapper for xvimagesink's frame-rate display",
"Measure and show framerate on videosink",
"Sink/Video",
"Shows the current frame-rate and drop-rate of the xvimagesink on the xvimagesink's video output",
"Shows the current frame-rate and drop-rate of the videosink as overlay or text on stdout",
"Zeeshan Ali <zeeshan.ali@nokia.com>, Stefan Kost <stefan.kost@nokia.com>"
};
@ -59,9 +67,12 @@ GST_DEBUG_CATEGORY_STATIC (fps_display_sink_debug);
struct _FPSDisplaySinkPrivate
{
/* gstreamer components */
GstElement *text_overlay;
GstElement *xvimagesink;
GstElement *video_sink;
GstQuery *query;
/* statistics */
guint64 frames_rendered, last_frames_rendered;
guint64 frames_dropped, last_frames_dropped;
GstClockTime last_ts;
@ -69,7 +80,7 @@ struct _FPSDisplaySinkPrivate
guint timeout_id;
gchar *font;
/* properties */
gboolean sync;
gboolean use_text_overlay;
};
@ -126,25 +137,8 @@ fps_display_sink_class_init (FPSDisplaySinkClass * klass)
g_type_class_add_private (klass, sizeof (FPSDisplaySinkPrivate));
}
static void
fps_display_sink_base_init (gpointer klass)
{
}
#if 0
static void
on_xvimagesink_caps_negotiated (GstPad * pad, GParamSpec * arg,
gpointer user_data)
{
GstCaps *caps = gst_pad_get_negotiated_caps (pad);
g_print ("caps negotiated on xvimagesink = %s\n", gst_caps_to_string (caps));
gst_caps_unref (caps);
}
#endif
static gboolean
on_xvimagesink_data_flow (GstPad * pad, GstMiniObject * mini_obj,
on_video_sink_data_flow (GstPad * pad, GstMiniObject * mini_obj,
gpointer user_data)
{
FPSDisplaySink *self = FPS_DISPLAY_SINK (user_data);
@ -157,8 +151,9 @@ on_xvimagesink_data_flow (GstPad * pad, GstMiniObject * mini_obj,
if (GST_BUFFER_TIMESTAMP (buf) <= self->priv->next_ts) {
self->priv->frames_rendered++;
} else {
g_debug ("dropping frame : ts %" GST_TIME_FORMAT " < expected_ts %"
GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_WARNING_OBJECT (self, "dropping frame : ts %" GST_TIME_FORMAT
" < expected_ts %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (self->priv->next_ts));
self->priv->frames_dropped++;
}
@ -194,50 +189,49 @@ fps_display_sink_init (FPSDisplaySink * self, FPSDisplaySinkClass * g_class)
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, FPS_TYPE_DISPLAY_SINK,
FPSDisplaySinkPrivate);
self->priv->font = DEFAULT_FONT;
self->priv->sync = FALSE;
self->priv->use_text_overlay = TRUE;
self->priv->xvimagesink =
gst_element_factory_make ("xvimagesink", "fps_display_xvimagesink");
/* create child elements */
self->priv->video_sink =
gst_element_factory_make ("xvimagesink", "fps-display-video_sink");
self->priv->text_overlay =
gst_element_factory_make ("textoverlay", "text-overlay");
gst_element_factory_make ("textoverlay", "fps-display-text-overlay");
if (!self->priv->xvimagesink || !self->priv->text_overlay) {
g_debug ("element could not be created");
if (!self->priv->video_sink || !self->priv->text_overlay) {
GST_ERROR_OBJECT (self, "element could not be created");
return;
}
g_object_set (self->priv->xvimagesink, "sync", self->priv->sync, NULL);
g_object_set (self->priv->text_overlay, "font-desc", self->priv->font, NULL);
g_object_set (self->priv->video_sink, "sync", self->priv->sync, NULL);
g_object_set (self->priv->text_overlay, "font-desc", DEFAULT_FONT, NULL);
/* take a ref before bin takes the ownership */
gst_object_ref (self->priv->text_overlay);
gst_object_ref (self->priv->xvimagesink);
gst_object_ref (self->priv->video_sink);
gst_bin_add_many (GST_BIN (self),
self->priv->text_overlay, self->priv->xvimagesink, NULL);
self->priv->text_overlay, self->priv->video_sink, NULL);
if (!gst_element_link_many (self->priv->text_overlay, self->priv->xvimagesink,
if (!gst_element_link_many (self->priv->text_overlay, self->priv->video_sink,
NULL)) {
g_error ("Could not link elements");
}
/* create ghost pad */
target_pad =
gst_element_get_static_pad (self->priv->text_overlay, "video_sink");
sink_pad = gst_ghost_pad_new ("sink_pad", target_pad);
gst_object_unref (target_pad);
gst_element_add_pad (GST_ELEMENT (self), sink_pad);
sink_pad = gst_element_get_static_pad (self->priv->xvimagesink, "sink");
#if 0
g_signal_connect (sink_pad, "notify::caps",
G_CALLBACK (on_xvimagesink_caps_negotiated), NULL);
#endif
gst_pad_add_data_probe (sink_pad, G_CALLBACK (on_xvimagesink_data_flow),
sink_pad = gst_element_get_static_pad (self->priv->video_sink, "sink");
gst_pad_add_data_probe (sink_pad, G_CALLBACK (on_video_sink_data_flow),
(gpointer) self);
gst_object_unref (sink_pad);
self->priv->query = gst_query_new_position (GST_FORMAT_TIME);
}
static gboolean
@ -245,22 +239,9 @@ display_current_fps (gpointer data)
{
FPSDisplaySink *self = FPS_DISPLAY_SINK (data);
gint64 current_ts;
#if 0
guint64 frames_rendered, frames_dropped;
#endif
GstQuery *query;
#if 0
query = gst_query_new_qos ();
gst_element_query (self->priv->xvimagesink, query);
gst_query_parse_qos (query, &frames_rendered, &frames_dropped);
gst_query_unref (query);
#endif
query = gst_query_new_position (GST_FORMAT_TIME);
gst_element_query (self->priv->xvimagesink, query);
gst_query_parse_position (query, NULL, &current_ts);
gst_query_unref (query);
gst_element_query (self->priv->video_sink, self->priv->query);
gst_query_parse_position (self->priv->query, NULL, &current_ts);
if (GST_CLOCK_TIME_IS_VALID (self->priv->last_ts)) {
gdouble rr, dr, average_fps;
@ -277,9 +258,10 @@ display_current_fps (gpointer data)
self->priv->frames_rendered / (gdouble) (current_ts / GST_SECOND);
if (dr == 0.0) {
sprintf (fps_message, "current: %.2f\naverage: %.2f", rr, average_fps);
g_snprintf (fps_message, 255, "current: %.2f\naverage: %.2f", rr,
average_fps);
} else {
sprintf (fps_message, "fps: %.2f\ndrop rate: %.2f", rr, dr);
g_snprintf (fps_message, 255, "fps: %.2f\ndrop rate: %.2f", rr, dr);
}
if (self->priv->use_text_overlay) {
@ -326,9 +308,14 @@ fps_display_sink_dispose (GObject * object)
{
FPSDisplaySink *self = FPS_DISPLAY_SINK (object);
if (self->priv->xvimagesink) {
gst_object_unref (self->priv->xvimagesink);
self->priv->xvimagesink = NULL;
if (self->priv->query) {
gst_query_unref (self->priv->query);
self->priv->query = NULL;
}
if (self->priv->video_sink) {
gst_object_unref (self->priv->video_sink);
self->priv->video_sink = NULL;
}
if (self->priv->text_overlay) {
@ -348,17 +335,17 @@ fps_display_sink_set_property (GObject * object, guint prop_id,
switch (prop_id) {
case ARG_SYNC:
self->priv->sync = g_value_get_boolean (value);
g_object_set (self->priv->xvimagesink, "sync", self->priv->sync, NULL);
g_object_set (self->priv->video_sink, "sync", self->priv->sync, NULL);
break;
case ARG_TEXT_OVERLAY:
self->priv->use_text_overlay = g_value_get_boolean (value);
if (!(self->priv->use_text_overlay)) {
g_print ("text-overlay set to false\n");
GST_DEBUG_OBJECT (self, "text-overlay set to false");
g_object_set (self->priv->text_overlay, "text", "", "silent", TRUE,
NULL);
} else {
g_print ("text-overlay set to true\n");
GST_DEBUG_OBJECT (self, "text-overlay set to true");
g_object_set (self->priv->text_overlay, "silent", FALSE, NULL);
}
break;
@ -423,7 +410,7 @@ fps_display_sink_get_type (void)
if (!fps_display_sink_type) {
static const GTypeInfo fps_display_sink_info = {
sizeof (FPSDisplaySinkClass),
fps_display_sink_base_init,
NULL,
NULL,
(GClassInitFunc) fps_display_sink_class_init,
NULL,