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WIP: Revert "Revert "debugutils: Added new jitterer element""

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This reverts commit ccc1624d09.
This commit is contained in:
Vivia Nikolaidou 2017-11-07 21:14:01 +02:00
parent 8dceeb5ccd
commit a401cb9a61
5 changed files with 462 additions and 2 deletions
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6
gst/debugutils/Makefile.am
View file

@ -8,7 +8,8 @@ libgstdebugutilsbad_la_SOURCES = \
gstchopmydata.c \
gstcompare.c \
gstwatchdog.c \
gsterrorignore.c
gsterrorignore.c \
gstjitterer.c
libgstdebugutilsbad_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS)
libgstdebugutilsbad_la_LIBADD = $(GST_BASE_LIBS) $(GST_PLUGINS_BASE_LIBS) \
@ -22,4 +23,5 @@ noinst_HEADERS = fpsdisplaysink.h \
gstcompare.h \
gstdebugspy.h \
gstwatchdog.h \
gsterrorignore.h
gsterrorignore.h \
gstjitterer.h

3
gst/debugutils/debugutilsbad.c
View file

@ -29,6 +29,7 @@ GType gst_chop_my_data_get_type (void);
GType gst_compare_get_type (void);
GType gst_debug_spy_get_type (void);
GType gst_error_ignore_get_type (void);
GType gst_jitterer_get_type (void);
GType gst_watchdog_get_type (void);
static gboolean
@ -48,6 +49,8 @@ plugin_init (GstPlugin * plugin)
gst_watchdog_get_type ());
gst_element_register (plugin, "errorignore", GST_RANK_NONE,
gst_error_ignore_get_type ());
gst_element_register (plugin, "jitterer", GST_RANK_NONE,
gst_jitterer_get_type ());
return TRUE;
}

387
gst/debugutils/gstjitterer.c Normal file
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@ -0,0 +1,387 @@
/*
* GStreamer
* Copyright (C) 2017 Vivia Nikolaidou <vivia@ahiru.eu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-jitterer
* @title: jitterer
*
* Adds jitter and/or drift to a buffer's PTS and/or DTS. Amplitude and
* average of jitter and drift are configurable.
*
* ## Example launch line
* |[
* gst-launch-1.0 videotestsrc ! jitterer drift-average=100 drift-amplitude=10 ! autovideosink
* ]|
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstjitterer.h"
#define GST_CAT_DEFAULT gst_jitterer_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
enum
{
PROP_0,
PROP_JITTER_AMPL,
PROP_JITTER_AVG,
PROP_DRIFT_AMPL,
PROP_DRIFT_AVG,
PROP_CHANGE_PTS,
PROP_CHANGE_DTS
};
static void gst_jitterer_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_jitterer_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_jitterer_finalize (GObject * object);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
#define parent_class gst_jitterer_parent_class
G_DEFINE_TYPE (GstJitterer, gst_jitterer, GST_TYPE_ELEMENT);
static GstFlowReturn gst_jitterer_sink_chain (GstPad * pad,
GstObject * parent, GstBuffer * inbuf);
static gboolean gst_jitterer_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static void
gst_jitterer_class_init (GstJittererClass * klass)
{
GstElementClass *gstelement_class;
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (gst_jitterer_debug, "jitterer", 0,
"Add jitter and/or drift to buffers");
gstelement_class = (GstElementClass *) klass;
gst_element_class_set_static_metadata (gstelement_class,
"Jitterer", "Generic", "Add jitter and/or drift to buffers",
"Vivia Nikolaidou <vivia@ahiru.eu>");
gst_element_class_add_static_pad_template (gstelement_class, &src_template);
gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
/* define virtual function pointers */
object_class->set_property = gst_jitterer_set_property;
object_class->get_property = gst_jitterer_get_property;
object_class->finalize = gst_jitterer_finalize;
/* define properties */
g_object_class_install_property (object_class, PROP_JITTER_AMPL,
g_param_spec_uint64 ("jitter-amplitude", "Jitter amplitude",
"Amplitude of the jitter to apply",
0, G_MAXINT64 / 2, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_JITTER_AVG,
g_param_spec_int64 ("jitter-average", "Jitter average",
"Average of the jitter to apply",
-G_MAXINT64 / 2, G_MAXINT64 / 2, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_DRIFT_AMPL,
g_param_spec_uint64 ("drift-amplitude", "Drift amplitude",
"Amplitude of the drift to apply",
0, G_MAXINT64 / 2, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_DRIFT_AVG,
g_param_spec_int64 ("drift-average", "Drift average",
"Average of the drift to apply",
-G_MAXINT64 / 2, G_MAXINT64 / 2, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_CHANGE_PTS,
g_param_spec_boolean ("change-pts", "Change PTS",
"Whether to change the PTS of incoming buffers",
TRUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_CHANGE_DTS,
g_param_spec_boolean ("change-dts", "Change DTS",
"Whether to change the DTS of incoming buffers",
TRUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_jitterer_init (GstJitterer * self)
{
self->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
gst_pad_set_chain_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_jitterer_sink_chain));
gst_pad_set_event_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_jitterer_sink_event));
GST_PAD_SET_PROXY_ALLOCATION (self->sinkpad);
GST_PAD_SET_PROXY_CAPS (self->sinkpad);
GST_PAD_SET_PROXY_SCHEDULING (self->sinkpad);
gst_element_add_pad (GST_ELEMENT (self), self->sinkpad);
self->srcpad = gst_pad_new_from_static_template (&src_template, "src");
gst_pad_use_fixed_caps (self->srcpad);
GST_PAD_SET_PROXY_ALLOCATION (self->srcpad);
GST_PAD_SET_PROXY_CAPS (self->srcpad);
GST_PAD_SET_PROXY_SCHEDULING (self->srcpad);
gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
self->jitter_ampl = 0;
self->jitter_avg = 0;
self->drift_ampl = 0;
self->drift_avg = 0;
self->change_pts = TRUE;
self->change_dts = TRUE;
self->prev_pts = GST_CLOCK_TIME_NONE;
self->dts_drift_so_far = 0;
self->pts_drift_so_far = 0;
self->rand = g_rand_new ();
}
static void
gst_jitterer_finalize (GObject * object)
{
GstJitterer *self = GST_JITTERER (object);
g_rand_free (self->rand);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_jitterer_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstJitterer *self = GST_JITTERER (object);
switch (prop_id) {
case PROP_JITTER_AMPL:
self->jitter_ampl = g_value_get_uint64 (value);
break;
case PROP_JITTER_AVG:
self->jitter_avg = g_value_get_int64 (value);
break;
case PROP_DRIFT_AMPL:
self->drift_ampl = g_value_get_uint64 (value);
break;
case PROP_DRIFT_AVG:
self->drift_avg = g_value_get_int64 (value);
break;
case PROP_CHANGE_PTS:
self->change_pts = g_value_get_boolean (value);
break;
case PROP_CHANGE_DTS:
self->change_dts = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_jitterer_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstJitterer *self = GST_JITTERER (object);
switch (prop_id) {
case PROP_JITTER_AMPL:
g_value_set_uint64 (value, self->jitter_ampl);
break;
case PROP_JITTER_AVG:
g_value_set_int64 (value, self->jitter_avg);
break;
case PROP_DRIFT_AMPL:
g_value_set_uint64 (value, self->drift_ampl);
break;
case PROP_DRIFT_AVG:
g_value_set_int64 (value, self->drift_avg);
break;
case PROP_CHANGE_PTS:
g_value_set_boolean (value, self->change_pts);
break;
case PROP_CHANGE_DTS:
g_value_set_boolean (value, self->change_dts);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gint64
gst_jitterer_rand_uint64_range (GRand * rand, gint64 min, gint64 max)
{
gint64 dist;
g_assert (max > min);
dist = max - min;
if (G_LIKELY (dist < G_MAXINT32)) {
return g_rand_int_range (rand, 0, dist) + min;
} else {
/* This code is based on g_rand_int_range source */
gint64 ret = max + 1;
/* maxvalue is set to the predecessor of the greatest
* multiple of dist less or equal 2^64.
*/
guint64 maxvalue;
if (dist <= 0x8000000000000000u) { /* 2^63 */
/* maxvalue = 2^64 - 1 - (2^64 % dist) */
guint64 leftover = (0x8000000000000000u % dist) * 2;
if (leftover >= dist)
leftover -= dist;
maxvalue = 0xffffffffffffffffu - leftover;
} else {
maxvalue = dist - 1;
}
do {
gint32 highrand, lowrand;
highrand = g_rand_int (rand);
lowrand = g_rand_int (rand);
ret = ((((gint64) highrand) << 32) | lowrand);
} while (ret > maxvalue);
ret %= dist;
return ret;
}
}
static gboolean
gst_jitterer_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstJitterer *self = GST_JITTERER (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
case GST_EVENT_FLUSH_STOP:
self->prev_pts = GST_CLOCK_TIME_NONE;
break;
default:
break;
}
return gst_pad_event_default (pad, parent, event);
}
static GstFlowReturn
gst_jitterer_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * inbuf)
{
GstJitterer *self = GST_JITTERER (parent);
if (self->jitter_ampl > 0) {
gint64 min, max;
gint64 jitter;
min = self->jitter_avg - self->jitter_ampl / 2;
max = self->jitter_avg + self->jitter_ampl / 2;
if (self->change_pts && GST_BUFFER_PTS (inbuf) != GST_CLOCK_TIME_NONE) {
jitter = gst_jitterer_rand_uint64_range (self->rand, min, max);
if (GST_BUFFER_PTS (inbuf) + jitter > 0)
GST_BUFFER_PTS (inbuf) = GST_BUFFER_PTS (inbuf) + jitter;
}
if (self->change_dts && GST_BUFFER_DTS (inbuf) != GST_CLOCK_TIME_NONE) {
jitter = gst_jitterer_rand_uint64_range (self->rand, min, max);
if (GST_BUFFER_DTS (inbuf) + jitter > 0)
GST_BUFFER_DTS (inbuf) = GST_BUFFER_DTS (inbuf) + jitter;
}
} else {
if (self->change_pts && GST_BUFFER_PTS (inbuf) != GST_CLOCK_TIME_NONE)
GST_BUFFER_PTS (inbuf) = GST_BUFFER_PTS (inbuf) + self->jitter_avg;
if (self->change_dts && GST_BUFFER_DTS (inbuf) != GST_CLOCK_TIME_NONE)
GST_BUFFER_DTS (inbuf) = GST_BUFFER_DTS (inbuf) + self->jitter_avg;
}
if (self->prev_pts != GST_CLOCK_TIME_NONE) {
GstClockTimeDiff drift_avg_per_frame;
GstClockTime pts_diff = GST_BUFFER_PTS (inbuf) - self->prev_pts;
if (self->drift_avg == 0) {
drift_avg_per_frame = 0;
} else if (self->drift_avg > 0) {
drift_avg_per_frame =
gst_util_uint64_scale (self->drift_avg, pts_diff, GST_SECOND);
} else {
drift_avg_per_frame =
-gst_util_uint64_scale (-self->drift_avg, pts_diff, GST_SECOND);
}
if (self->drift_ampl > 0) {
gint min, max;
GstClockTime drift_ampl_per_frame;
drift_ampl_per_frame =
gst_util_uint64_scale (self->drift_ampl, pts_diff, GST_SECOND);
min = drift_avg_per_frame - drift_ampl_per_frame / 2;
max = drift_avg_per_frame + drift_ampl_per_frame / 2;
if (self->change_pts && GST_BUFFER_PTS (inbuf) != GST_CLOCK_TIME_NONE) {
/* FIXME: if (min == max) means the amplitude is too small, make a
* probabilistic +1 or -1 instead */
if (min == max)
self->pts_drift_so_far += drift_avg_per_frame;
else
self->pts_drift_so_far +=
gst_jitterer_rand_uint64_range (self->rand, min, max);
if (GST_BUFFER_PTS (inbuf) + self->pts_drift_so_far > 0)
GST_BUFFER_PTS (inbuf) =
GST_BUFFER_PTS (inbuf) + self->pts_drift_so_far;
}
if (self->change_dts && GST_BUFFER_DTS (inbuf) != GST_CLOCK_TIME_NONE) {
if (min == max)
self->pts_drift_so_far += drift_avg_per_frame;
else
self->dts_drift_so_far +=
gst_jitterer_rand_uint64_range (self->rand, min, max);
if (GST_BUFFER_DTS (inbuf) + self->dts_drift_so_far > 0)
GST_BUFFER_DTS (inbuf) =
GST_BUFFER_DTS (inbuf) + self->dts_drift_so_far;
}
} else {
if (self->change_pts && GST_BUFFER_PTS (inbuf) != GST_CLOCK_TIME_NONE) {
self->pts_drift_so_far += drift_avg_per_frame;
GST_BUFFER_PTS (inbuf) =
GST_BUFFER_PTS (inbuf) + self->pts_drift_so_far;
}
if (self->change_dts && GST_BUFFER_DTS (inbuf) != GST_CLOCK_TIME_NONE) {
self->dts_drift_so_far += drift_avg_per_frame;
GST_BUFFER_DTS (inbuf) =
GST_BUFFER_DTS (inbuf) + self->dts_drift_so_far;
}
}
}
self->prev_pts = GST_BUFFER_PTS (inbuf);
return gst_pad_push (self->srcpad, inbuf);
}

67
gst/debugutils/gstjitterer.h Normal file
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@ -0,0 +1,67 @@
/*
* GStreamer
* Copyright (C) 2017 Vivia Nikolaidou <vivia@ahiru.eu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_JITTERER_H__
#define __GST_JITTERER_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_JITTERER (gst_jitterer_get_type())
#define GST_JITTERER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_JITTERER,GstJitterer))
#define GST_IS_JITTERER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_JITTERER))
#define GST_JITTERER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_JITTERER,GstJittererClass))
#define GST_IS_JITTERER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_JITTERER))
#define GST_JITTERER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_JITTERER,GstJittererClass))
typedef struct _GstJitterer GstJitterer;
typedef struct _GstJittererClass GstJittererClass;
struct _GstJitterer {
GstElement parent;
GstClockTime jitter_ampl;
GstClockTimeDiff jitter_avg;
GstClockTime drift_ampl;
GstClockTimeDiff drift_avg;
gboolean change_pts;
gboolean change_dts;
gint64 dts_drift_so_far;
gint64 pts_drift_so_far;
GRand *rand;
GstClockTime prev_pts;
GstPad *srcpad;
GstPad *sinkpad;
};
struct _GstJittererClass {
GstElementClass parent_class;
};
GType gst_jitterer_get_type (void);
gboolean gst_jitterer_plugin_init (GstPlugin * plugin);
G_END_DECLS
#endif /* __GST_JITTERER_H__ */

1
gst/debugutils/meson.build
View file

@ -1,6 +1,7 @@
debugutilsbad_sources = [
'gstdebugspy.c',
'gsterrorignore.c',
'gstjitterer.c',
'debugutilsbad.c',
'fpsdisplaysink.c',
'gstchecksumsink.c',