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fpsdisplaysink: measure fps in terms of wall clock time

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Measure fps in terms of system clock, rather than pipeline clock, to get
an accurate meaure of fps.
This commit is contained in:
Rob Clark 2010-08-23 09:51:25 -05:00 committed by Stefan Kost
parent 813a2235b5
commit 60c963f0ac
2 changed files with 65 additions and 64 deletions
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74
gst/debugutils/fpsdisplaysink.c
View file

@ -94,6 +94,8 @@ static void fps_display_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void fps_display_sink_dispose (GObject * object);
static gboolean display_current_fps (gpointer data);
static guint fpsdisplaysink_signals[LAST_SIGNAL] = { 0 };
static void
@ -213,12 +215,18 @@ on_video_sink_data_flow (GstPad * pad, GstMiniObject * mini_obj,
GstClockTime ts;
gst_event_parse_qos (ev, NULL, &diff, &ts);
self->next_ts = ts + diff;
if (diff <= 0.0) {
self->frames_rendered++;
} else {
self->frames_dropped++;
}
if (G_UNLIKELY (!self->timeout_id)) {
self->last_ts = self->start_ts = gst_util_get_timestamp ();
self->timeout_id =
g_timeout_add (self->fps_update_interval, display_current_fps,
(gpointer) self);
}
}
}
return TRUE;
@ -309,37 +317,33 @@ fps_display_sink_init (GstFPSDisplaySink * self,
self->ghost_pad = gst_ghost_pad_new_no_target ("sink", GST_PAD_SINK);
gst_element_add_pad (GST_ELEMENT (self), self->ghost_pad);
self->query = gst_query_new_position (GST_FORMAT_TIME);
}
static gboolean
display_current_fps (gpointer data)
{
GstFPSDisplaySink *self = GST_FPS_DISPLAY_SINK (data);
gint64 current_ts;
guint64 frames_rendered, frames_dropped;
gdouble rr, dr, average_fps;
gchar fps_message[256];
gdouble time_diff, time_elapsed;
GstClockTime current_ts = gst_util_get_timestamp ();
/* if query failed try again on next timer tick */
if (!gst_element_query (self->video_sink, self->query)) {
GST_DEBUG_OBJECT (self, "Failed to query position, skipping measurement");
frames_rendered = self->frames_rendered;
frames_dropped = self->frames_dropped;
if ((frames_rendered + frames_dropped) == 0) {
/* in case timer fired and we didn't yet get any QOS events */
return TRUE;
}
gst_query_parse_position (self->query, NULL, &current_ts);
GST_LOG_OBJECT (self, "Received position %" GST_TIME_FORMAT,
GST_TIME_ARGS (current_ts));
time_diff = (gdouble) (current_ts - self->last_ts) / GST_SECOND;
time_elapsed = (gdouble) (current_ts - self->start_ts) / GST_SECOND;
if (GST_CLOCK_TIME_IS_VALID (self->last_ts)) {
gdouble rr, dr, average_fps;
gchar fps_message[256];
gdouble time_diff = (gdouble) (current_ts - self->last_ts) / GST_SECOND;
rr = (gdouble) (frames_rendered - self->last_frames_rendered) / time_diff;
dr = (gdouble) (frames_dropped - self->last_frames_dropped) / time_diff;
rr = (gdouble) (self->frames_rendered -
self->last_frames_rendered) / time_diff;
dr = (gdouble) (self->frames_dropped -
self->last_frames_dropped) / time_diff;
average_fps = self->frames_rendered / (gdouble) (current_ts / GST_SECOND);
average_fps = (gdouble) frames_rendered / time_elapsed;
if (self->max_fps == -1 || rr > self->max_fps) {
self->max_fps = rr;
@ -358,11 +362,20 @@ display_current_fps (gpointer data)
average_fps);
}
/* Display on a single line to make it easier to read and import
* into, for example, excel.. note: it would be nice to show
* timestamp too.. need to check if there is a sane way to log
* timestamp of last rendered buffer, so we could correlate dips
* in framerate to certain positions in the stream.
*/
if (dr == 0.0) {
g_snprintf (fps_message, 255, "current: %.2f\naverage: %.2f", rr,
average_fps);
g_snprintf (fps_message, 255,
"rendered: %llu\t dropped: %llu\t current: %.2f\t average: %.2f",
frames_rendered, frames_dropped, rr, average_fps);
} else {
g_snprintf (fps_message, 255, "fps: %.2f\ndrop rate: %.2f", rr, dr);
g_snprintf (fps_message, 255,
"rendered: %llu\t dropped: %llu\t fps: %.2f\t drop rate: %.2f",
frames_rendered, frames_dropped, rr, dr);
}
if (self->use_text_overlay) {
@ -370,10 +383,9 @@ display_current_fps (gpointer data)
} else {
g_print ("%s\n", fps_message);
}
}
self->last_frames_rendered = self->frames_rendered;
self->last_frames_dropped = self->frames_dropped;
self->last_frames_rendered = frames_rendered;
self->last_frames_dropped = frames_dropped;
self->last_ts = current_ts;
return TRUE;
@ -385,8 +397,6 @@ fps_display_sink_start (GstFPSDisplaySink * self)
GstPad *target_pad = NULL;
/* Init counters */
self->next_ts = GST_CLOCK_TIME_NONE;
self->last_ts = GST_CLOCK_TIME_NONE;
self->frames_rendered = G_GUINT64_CONSTANT (0);
self->frames_dropped = G_GUINT64_CONSTANT (0);
self->max_fps = -1;
@ -429,9 +439,6 @@ no_text_overlay:
/* Set a timeout for the fps display */
GST_DEBUG_OBJECT (self, "setting a timeout with a %dms interval",
self->fps_update_interval);
self->timeout_id =
g_timeout_add (self->fps_update_interval, display_current_fps,
(gpointer) self);
}
static void
@ -459,11 +466,6 @@ fps_display_sink_dispose (GObject * object)
{
GstFPSDisplaySink *self = GST_FPS_DISPLAY_SINK (object);
if (self->query) {
gst_query_unref (self->query);
self->query = NULL;
}
if (self->video_sink) {
gst_object_unref (self->video_sink);
self->video_sink = NULL;

5
gst/debugutils/fpsdisplaysink.h
View file

@ -48,15 +48,14 @@ struct _GstFPSDisplaySink
/* gstreamer components */
GstElement *text_overlay;
GstElement *video_sink;
GstQuery *query;
GstPad *ghost_pad;
/* statistics */
guint64 frames_rendered, last_frames_rendered;
guint64 frames_dropped, last_frames_dropped;
GstClockTime last_ts;
GstClockTime next_ts;
GstClockTime start_ts;
GstClockTime last_ts;
guint timeout_id;
guint data_probe_id;