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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_GETRUSAGE
#include "gst-cpu-throttling-clock.h"
#include <unistd.h>
#include <sys/resource.h>
#include "gst-cpu-throttling-clock.h"
/**
* SECTION: gst-cpu-throttling-clock
* @title: GstCpuThrottlingClock
* @short_description: TODO
*
* TODO
*/
/* *INDENT-OFF* */
GST_DEBUG_CATEGORY_STATIC (gst_cpu_throttling_clock_debug);
#define GST_CAT_DEFAULT gst_cpu_throttling_clock_debug
struct _GstCpuThrottlingClockPrivate
{
guint wanted_cpu_usage;
GstClock *sclock;
GstClockTime current_wait_time;
GstPoll *timer;
struct rusage last_usage;
GstClockID evaluate_wait_time;
GstClockTime time_between_evals;
};
#define parent_class gst_cpu_throttling_clock_parent_class
G_DEFINE_TYPE_WITH_CODE (GstCpuThrottlingClock, gst_cpu_throttling_clock, GST_TYPE_CLOCK, G_ADD_PRIVATE(GstCpuThrottlingClock))
enum
{
PROP_FIRST,
PROP_CPU_USAGE,
PROP_LAST
};
static GParamSpec *param_specs[PROP_LAST] = { NULL, };
/* *INDENT-ON* */
static void
gst_cpu_throttling_clock_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec)
{
GstCpuThrottlingClock *self = GST_CPU_THROTTLING_CLOCK (object);
switch (property_id) {
case PROP_CPU_USAGE:
g_value_set_uint (value, self->priv->wanted_cpu_usage);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gst_cpu_throttling_clock_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec)
{
GstCpuThrottlingClock *self = GST_CPU_THROTTLING_CLOCK (object);
switch (property_id) {
case PROP_CPU_USAGE:
self->priv->wanted_cpu_usage = g_value_get_uint (value);
if (self->priv->wanted_cpu_usage == 0)
self->priv->wanted_cpu_usage = 100;
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gboolean
gst_transcoder_adjust_wait_time (GstClock * sync_clock, GstClockTime time,
GstClockID id, GstCpuThrottlingClock * self)
{
struct rusage ru;
float delta_usage, usage, coef;
GstCpuThrottlingClockPrivate *priv = self->priv;
getrusage (RUSAGE_SELF, &ru);
delta_usage = GST_TIMEVAL_TO_TIME (ru.ru_utime) -
GST_TIMEVAL_TO_TIME (self->priv->last_usage.ru_utime);
usage =
((float) delta_usage / self->priv->time_between_evals * 100) /
g_get_num_processors ();
self->priv->last_usage = ru;
coef = GST_MSECOND / 10;
if (usage < (gfloat) priv->wanted_cpu_usage) {
coef = -coef;
}
priv->current_wait_time = CLAMP (0,
(GstClockTime) priv->current_wait_time + coef, GST_SECOND);
GST_DEBUG_OBJECT (self,
"Avg is %f (wanted %d) => %" GST_TIME_FORMAT, usage,
self->priv->wanted_cpu_usage, GST_TIME_ARGS (priv->current_wait_time));
return TRUE;
}
static GstClockReturn
_wait (GstClock * clock, GstClockEntry * entry, GstClockTimeDiff * jitter)
{
GstCpuThrottlingClock *self = GST_CPU_THROTTLING_CLOCK (clock);
if (!self->priv->evaluate_wait_time) {
if (!(self->priv->sclock)) {
GST_ERROR_OBJECT (clock, "Could not find any system clock"
" to start the wait time evaluation task");
} else {
self->priv->evaluate_wait_time =
gst_clock_new_periodic_id (self->priv->sclock,
gst_clock_get_time (self->priv->sclock),
self->priv->time_between_evals);
gst_clock_id_wait_async (self->priv->evaluate_wait_time,
(GstClockCallback) gst_transcoder_adjust_wait_time,
(gpointer) self, NULL);
}
}
if (G_UNLIKELY (GST_CLOCK_ENTRY_STATUS (entry) == GST_CLOCK_UNSCHEDULED))
return GST_CLOCK_UNSCHEDULED;
if (gst_poll_wait (self->priv->timer, self->priv->current_wait_time)) {
GST_INFO_OBJECT (self, "Something happened on the poll");
}
return GST_CLOCK_ENTRY_STATUS (entry);
}
static GstClockTime
_get_internal_time (GstClock * clock)
{
GstCpuThrottlingClock *self = GST_CPU_THROTTLING_CLOCK (clock);
return gst_clock_get_internal_time (self->priv->sclock);
}
static void
gst_cpu_throttling_clock_dispose (GObject * object)
{
GstCpuThrottlingClock *self = GST_CPU_THROTTLING_CLOCK (object);
if (self->priv->evaluate_wait_time) {
gst_clock_id_unschedule (self->priv->evaluate_wait_time);
gst_clock_id_unref (self->priv->evaluate_wait_time);
self->priv->evaluate_wait_time = 0;
}
}
static void
gst_cpu_throttling_clock_class_init (GstCpuThrottlingClockClass * klass)
{
GObjectClass *oclass = G_OBJECT_CLASS (klass);
GstClockClass *clock_klass = GST_CLOCK_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (gst_cpu_throttling_clock_debug, "cpuclock", 0,
"UriTranscodebin element");
oclass->get_property = gst_cpu_throttling_clock_get_property;
oclass->set_property = gst_cpu_throttling_clock_set_property;
oclass->dispose = gst_cpu_throttling_clock_dispose;
/**
* GstCpuThrottlingClock:cpu-usage:
*
* Since: UNRELEASED
*/
param_specs[PROP_CPU_USAGE] = g_param_spec_uint ("cpu-usage", "cpu-usage",
"The percentage of CPU to try to use with the processus running the "
"pipeline driven by the clock", 0, 100,
100, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (oclass, PROP_LAST, param_specs);
clock_klass->wait = GST_DEBUG_FUNCPTR (_wait);
clock_klass->get_internal_time = _get_internal_time;
}
static void
gst_cpu_throttling_clock_init (GstCpuThrottlingClock * self)
{
self->priv = gst_cpu_throttling_clock_get_instance_private (self);
self->priv->current_wait_time = GST_MSECOND;
self->priv->wanted_cpu_usage = 100;
self->priv->timer = gst_poll_new_timer ();
self->priv->time_between_evals = GST_SECOND / 4;
self->priv->sclock = GST_CLOCK (gst_system_clock_obtain ());
getrusage (RUSAGE_SELF, &self->priv->last_usage);
}
GstCpuThrottlingClock *
gst_cpu_throttling_clock_new (guint cpu_usage)
{
return g_object_new (GST_TYPE_CPU_THROTTLING_CLOCK, "cpu-usage",
cpu_usage, NULL);
}
#endif
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