mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
Since the videorate element just duplicates or drops frames to achieve the desired framerate, it can accept video/x-bayer media (in any format), which are not present in the current caps. Just add "video/x-bayer(ANY);" to the caps of the static pad template (fixing line style to pass the indent commit hook). https://bugzilla.gnome.org/show_bug.cgi?id=753483
1403 lines
45 KiB
C
1403 lines
45 KiB
C
/* GStreamer
|
|
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
|
|
*
|
|
* 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-videorate
|
|
*
|
|
* This element takes an incoming stream of timestamped video frames.
|
|
* It will produce a perfect stream that matches the source pad's framerate.
|
|
*
|
|
* The correction is performed by dropping and duplicating frames, no fancy
|
|
* algorithm is used to interpolate frames (yet).
|
|
*
|
|
* By default the element will simply negotiate the same framerate on its
|
|
* source and sink pad.
|
|
*
|
|
* This operation is useful to link to elements that require a perfect stream.
|
|
* Typical examples are formats that do not store timestamps for video frames,
|
|
* but only store a framerate, like Ogg and AVI.
|
|
*
|
|
* A conversion to a specific framerate can be forced by using filtered caps on
|
|
* the source pad.
|
|
*
|
|
* The properties #GstVideoRate:in, #GstVideoRate:out, #GstVideoRate:duplicate
|
|
* and #GstVideoRate:drop can be read to obtain information about number of
|
|
* input frames, output frames, dropped frames (i.e. the number of unused input
|
|
* frames) and duplicated frames (i.e. the number of times an input frame was
|
|
* duplicated, beside being used normally).
|
|
*
|
|
* An input stream that needs no adjustments will thus never have dropped or
|
|
* duplicated frames.
|
|
*
|
|
* When the #GstVideoRate:silent property is set to FALSE, a GObject property
|
|
* notification will be emitted whenever one of the #GstVideoRate:duplicate or
|
|
* #GstVideoRate:drop values changes.
|
|
* This can potentially cause performance degradation.
|
|
* Note that property notification will happen from the streaming thread, so
|
|
* applications should be prepared for this.
|
|
*
|
|
* <refsect2>
|
|
* <title>Example pipelines</title>
|
|
* |[
|
|
* gst-launch-1.0 -v uridecodebin uri=file:///path/to/video.ogg ! videoconvert ! videoscale ! videorate ! video/x-raw,framerate=15/1 ! autovideosink
|
|
* ]| Decode a video file and adjust the framerate to 15 fps before playing.
|
|
* To create a test Ogg/Theora file refer to the documentation of theoraenc.
|
|
* |[
|
|
* gst-launch-1.0 -v v4l2src ! videorate ! video/x-raw,framerate=25/2 ! theoraenc ! oggmux ! filesink location=recording.ogg
|
|
* ]| Capture video from a V4L device, and adjust the stream to 12.5 fps before
|
|
* encoding to Ogg/Theora.
|
|
* |[
|
|
* gst-launch-1.0 -v uridecodebin uri=file:///path/to/video.ogg ! videoconvert ! videoscale ! videorate ! video/x-raw,framerate=1/5 ! jpegenc ! multifilesink location=snapshot-%05d.jpg
|
|
* ]| Decode a video file and save a snapshot every 5 seconds as consecutively numbered jpeg file.
|
|
* </refsect2>
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "gstvideorate.h"
|
|
#include <gst/video/video.h>
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (video_rate_debug);
|
|
#define GST_CAT_DEFAULT video_rate_debug
|
|
|
|
/* GstVideoRate signals and args */
|
|
enum
|
|
{
|
|
/* FILL ME */
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
#define DEFAULT_SILENT TRUE
|
|
#define DEFAULT_NEW_PREF 1.0
|
|
#define DEFAULT_SKIP_TO_FIRST FALSE
|
|
#define DEFAULT_DROP_ONLY FALSE
|
|
#define DEFAULT_AVERAGE_PERIOD 0
|
|
#define DEFAULT_MAX_RATE G_MAXINT
|
|
|
|
enum
|
|
{
|
|
PROP_0,
|
|
PROP_IN,
|
|
PROP_OUT,
|
|
PROP_DUP,
|
|
PROP_DROP,
|
|
PROP_SILENT,
|
|
PROP_NEW_PREF,
|
|
PROP_SKIP_TO_FIRST,
|
|
PROP_DROP_ONLY,
|
|
PROP_AVERAGE_PERIOD,
|
|
PROP_MAX_RATE
|
|
};
|
|
|
|
static GstStaticPadTemplate gst_video_rate_src_template =
|
|
GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("video/x-raw(ANY);" "video/x-bayer(ANY);"
|
|
"image/jpeg(ANY);" "image/png(ANY)")
|
|
);
|
|
|
|
static GstStaticPadTemplate gst_video_rate_sink_template =
|
|
GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("video/x-raw(ANY);" "video/x-bayer(ANY);"
|
|
"image/jpeg(ANY);" "image/png(ANY)")
|
|
);
|
|
|
|
static void gst_video_rate_swap_prev (GstVideoRate * videorate,
|
|
GstBuffer * buffer, gint64 time);
|
|
static gboolean gst_video_rate_sink_event (GstBaseTransform * trans,
|
|
GstEvent * event);
|
|
static gboolean gst_video_rate_query (GstBaseTransform * trans,
|
|
GstPadDirection direction, GstQuery * query);
|
|
|
|
static gboolean gst_video_rate_setcaps (GstBaseTransform * trans,
|
|
GstCaps * in_caps, GstCaps * out_caps);
|
|
|
|
static GstCaps *gst_video_rate_transform_caps (GstBaseTransform * trans,
|
|
GstPadDirection direction, GstCaps * caps, GstCaps * filter);
|
|
|
|
static GstCaps *gst_video_rate_fixate_caps (GstBaseTransform * trans,
|
|
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
|
|
|
|
static GstFlowReturn gst_video_rate_transform_ip (GstBaseTransform * trans,
|
|
GstBuffer * buf);
|
|
|
|
static gboolean gst_video_rate_propose_allocation (GstBaseTransform * trans,
|
|
GstQuery * decide_query, GstQuery * query);
|
|
|
|
static gboolean gst_video_rate_start (GstBaseTransform * trans);
|
|
static gboolean gst_video_rate_stop (GstBaseTransform * trans);
|
|
|
|
|
|
static void gst_video_rate_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec);
|
|
static void gst_video_rate_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec);
|
|
|
|
static GParamSpec *pspec_drop = NULL;
|
|
static GParamSpec *pspec_duplicate = NULL;
|
|
|
|
#define gst_video_rate_parent_class parent_class
|
|
G_DEFINE_TYPE (GstVideoRate, gst_video_rate, GST_TYPE_BASE_TRANSFORM);
|
|
|
|
static void
|
|
gst_video_rate_class_init (GstVideoRateClass * klass)
|
|
{
|
|
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
GstBaseTransformClass *base_class = GST_BASE_TRANSFORM_CLASS (klass);
|
|
|
|
object_class->set_property = gst_video_rate_set_property;
|
|
object_class->get_property = gst_video_rate_get_property;
|
|
|
|
base_class->set_caps = GST_DEBUG_FUNCPTR (gst_video_rate_setcaps);
|
|
base_class->transform_caps =
|
|
GST_DEBUG_FUNCPTR (gst_video_rate_transform_caps);
|
|
base_class->transform_ip = GST_DEBUG_FUNCPTR (gst_video_rate_transform_ip);
|
|
base_class->sink_event = GST_DEBUG_FUNCPTR (gst_video_rate_sink_event);
|
|
base_class->start = GST_DEBUG_FUNCPTR (gst_video_rate_start);
|
|
base_class->stop = GST_DEBUG_FUNCPTR (gst_video_rate_stop);
|
|
base_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_video_rate_fixate_caps);
|
|
base_class->query = GST_DEBUG_FUNCPTR (gst_video_rate_query);
|
|
base_class->propose_allocation =
|
|
GST_DEBUG_FUNCPTR (gst_video_rate_propose_allocation);
|
|
|
|
g_object_class_install_property (object_class, PROP_IN,
|
|
g_param_spec_uint64 ("in", "In",
|
|
"Number of input frames", 0, G_MAXUINT64, 0,
|
|
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (object_class, PROP_OUT,
|
|
g_param_spec_uint64 ("out", "Out", "Number of output frames", 0,
|
|
G_MAXUINT64, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
|
|
pspec_duplicate = g_param_spec_uint64 ("duplicate", "Duplicate",
|
|
"Number of duplicated frames", 0, G_MAXUINT64, 0,
|
|
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
|
|
g_object_class_install_property (object_class, PROP_DUP, pspec_duplicate);
|
|
pspec_drop = g_param_spec_uint64 ("drop", "Drop", "Number of dropped frames",
|
|
0, G_MAXUINT64, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
|
|
g_object_class_install_property (object_class, PROP_DROP, pspec_drop);
|
|
g_object_class_install_property (object_class, PROP_SILENT,
|
|
g_param_spec_boolean ("silent", "silent",
|
|
"Don't emit notify for dropped and duplicated frames", DEFAULT_SILENT,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (object_class, PROP_NEW_PREF,
|
|
g_param_spec_double ("new-pref", "New Pref",
|
|
"Value indicating how much to prefer new frames (unused)", 0.0, 1.0,
|
|
DEFAULT_NEW_PREF, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstVideoRate:skip-to-first:
|
|
*
|
|
* Don't produce buffers before the first one we receive.
|
|
*/
|
|
g_object_class_install_property (object_class, PROP_SKIP_TO_FIRST,
|
|
g_param_spec_boolean ("skip-to-first", "Skip to first buffer",
|
|
"Don't produce buffers before the first one we receive",
|
|
DEFAULT_SKIP_TO_FIRST, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstVideoRate:drop-only:
|
|
*
|
|
* Only drop frames, no duplicates are produced.
|
|
*/
|
|
g_object_class_install_property (object_class, PROP_DROP_ONLY,
|
|
g_param_spec_boolean ("drop-only", "Only Drop",
|
|
"Only drop frames, no duplicates are produced",
|
|
DEFAULT_DROP_ONLY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstVideoRate:average-period:
|
|
*
|
|
* Arrange for maximum framerate by dropping frames beyond a certain framerate,
|
|
* where the framerate is calculated using a moving average over the
|
|
* configured.
|
|
*/
|
|
g_object_class_install_property (object_class, PROP_AVERAGE_PERIOD,
|
|
g_param_spec_uint64 ("average-period", "Period over which to average",
|
|
"Period over which to average the framerate (in ns) (0 = disabled)",
|
|
0, G_MAXINT64, DEFAULT_AVERAGE_PERIOD,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstVideoRate:max-rate:
|
|
*
|
|
* maximum framerate to pass through
|
|
*/
|
|
g_object_class_install_property (object_class, PROP_MAX_RATE,
|
|
g_param_spec_int ("max-rate", "maximum framerate",
|
|
"Maximum framerate allowed to pass through "
|
|
"(in frames per second, implies drop-only)",
|
|
1, G_MAXINT, DEFAULT_MAX_RATE,
|
|
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
|
|
|
|
gst_element_class_set_static_metadata (element_class,
|
|
"Video rate adjuster", "Filter/Effect/Video",
|
|
"Drops/duplicates/adjusts timestamps on video frames to make a perfect stream",
|
|
"Wim Taymans <wim@fluendo.com>");
|
|
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&gst_video_rate_sink_template));
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&gst_video_rate_src_template));
|
|
}
|
|
|
|
static void
|
|
gst_value_fraction_get_extremes (const GValue * v,
|
|
gint * min_num, gint * min_denom, gint * max_num, gint * max_denom)
|
|
{
|
|
if (GST_VALUE_HOLDS_FRACTION (v)) {
|
|
*min_num = *max_num = gst_value_get_fraction_numerator (v);
|
|
*min_denom = *max_denom = gst_value_get_fraction_denominator (v);
|
|
} else if (GST_VALUE_HOLDS_FRACTION_RANGE (v)) {
|
|
const GValue *min, *max;
|
|
|
|
min = gst_value_get_fraction_range_min (v);
|
|
*min_num = gst_value_get_fraction_numerator (min);
|
|
*min_denom = gst_value_get_fraction_denominator (min);
|
|
|
|
max = gst_value_get_fraction_range_max (v);
|
|
*max_num = gst_value_get_fraction_numerator (max);
|
|
*max_denom = gst_value_get_fraction_denominator (max);
|
|
} else if (GST_VALUE_HOLDS_LIST (v)) {
|
|
gint min_n = G_MAXINT, min_d = 1, max_n = 0, max_d = 1;
|
|
int i, n;
|
|
|
|
*min_num = G_MAXINT;
|
|
*min_denom = 1;
|
|
*max_num = 0;
|
|
*max_denom = 1;
|
|
|
|
n = gst_value_list_get_size (v);
|
|
|
|
g_assert (n > 0);
|
|
|
|
for (i = 0; i < n; i++) {
|
|
const GValue *t = gst_value_list_get_value (v, i);
|
|
|
|
gst_value_fraction_get_extremes (t, &min_n, &min_d, &max_n, &max_d);
|
|
if (gst_util_fraction_compare (min_n, min_d, *min_num, *min_denom) < 0) {
|
|
*min_num = min_n;
|
|
*min_denom = min_d;
|
|
}
|
|
|
|
if (gst_util_fraction_compare (max_n, max_d, *max_num, *max_denom) > 0) {
|
|
*max_num = max_n;
|
|
*max_denom = max_d;
|
|
}
|
|
}
|
|
} else {
|
|
g_warning ("Unknown type for framerate");
|
|
*min_num = 0;
|
|
*min_denom = 1;
|
|
*max_num = G_MAXINT;
|
|
*max_denom = 1;
|
|
}
|
|
}
|
|
|
|
/* Clamp the framerate in a caps structure to be a smaller range then
|
|
* [1...max_rate], otherwise return false */
|
|
static gboolean
|
|
gst_video_max_rate_clamp_structure (GstStructure * s, gint maxrate,
|
|
gint * min_num, gint * min_denom, gint * max_num, gint * max_denom)
|
|
{
|
|
gboolean ret = FALSE;
|
|
|
|
if (!gst_structure_has_field (s, "framerate")) {
|
|
/* No framerate field implies any framerate, clamping would result in
|
|
* [1..max_rate] so not a real subset */
|
|
goto out;
|
|
} else {
|
|
const GValue *v;
|
|
GValue intersection = { 0, };
|
|
GValue clamp = { 0, };
|
|
gint tmp_num, tmp_denom;
|
|
|
|
g_value_init (&clamp, GST_TYPE_FRACTION_RANGE);
|
|
gst_value_set_fraction_range_full (&clamp, 0, 1, maxrate, 1);
|
|
|
|
v = gst_structure_get_value (s, "framerate");
|
|
ret = gst_value_intersect (&intersection, v, &clamp);
|
|
g_value_unset (&clamp);
|
|
|
|
if (!ret)
|
|
goto out;
|
|
|
|
gst_value_fraction_get_extremes (&intersection,
|
|
min_num, min_denom, max_num, max_denom);
|
|
|
|
gst_value_fraction_get_extremes (v,
|
|
&tmp_num, &tmp_denom, max_num, max_denom);
|
|
|
|
if (gst_util_fraction_compare (*max_num, *max_denom, maxrate, 1) > 0) {
|
|
*max_num = maxrate;
|
|
*max_denom = 1;
|
|
}
|
|
|
|
gst_structure_take_value (s, "framerate", &intersection);
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_video_rate_transform_caps (GstBaseTransform * trans,
|
|
GstPadDirection direction, GstCaps * caps, GstCaps * filter)
|
|
{
|
|
GstVideoRate *videorate = GST_VIDEO_RATE (trans);
|
|
GstCaps *ret;
|
|
GstStructure *s, *s1, *s2, *s3 = NULL;
|
|
int maxrate = g_atomic_int_get (&videorate->max_rate);
|
|
gint i;
|
|
|
|
ret = gst_caps_new_empty ();
|
|
|
|
for (i = 0; i < gst_caps_get_size (caps); i++) {
|
|
s = gst_caps_get_structure (caps, i);
|
|
|
|
s1 = gst_structure_copy (s);
|
|
|
|
if (videorate->updating_caps && direction == GST_PAD_SINK) {
|
|
GST_INFO_OBJECT (trans,
|
|
"Only updating caps %" GST_PTR_FORMAT " with framerate" " %d/%d",
|
|
caps, videorate->to_rate_numerator, videorate->to_rate_denominator);
|
|
|
|
gst_structure_set (s1, "framerate", GST_TYPE_FRACTION,
|
|
videorate->to_rate_numerator, videorate->to_rate_denominator, NULL);
|
|
ret = gst_caps_merge_structure (ret, s1);
|
|
|
|
continue;
|
|
}
|
|
|
|
s2 = gst_structure_copy (s);
|
|
s3 = NULL;
|
|
|
|
if (videorate->drop_only) {
|
|
gint min_num = 0, min_denom = 1;
|
|
gint max_num = G_MAXINT, max_denom = 1;
|
|
|
|
/* Clamp the caps to our maximum rate as the first caps if possible */
|
|
if (!gst_video_max_rate_clamp_structure (s1, maxrate,
|
|
&min_num, &min_denom, &max_num, &max_denom)) {
|
|
min_num = 0;
|
|
min_denom = 1;
|
|
max_num = maxrate;
|
|
max_denom = 1;
|
|
|
|
/* clamp wouldn't be a real subset of 1..maxrate, in this case the sink
|
|
* caps should become [1..maxrate], [1..maxint] and the src caps just
|
|
* [1..maxrate]. In case there was a caps incompatibility things will
|
|
* explode later as appropriate :)
|
|
*
|
|
* In case [X..maxrate] == [X..maxint], skip as we'll set it later
|
|
*/
|
|
if (direction == GST_PAD_SRC && maxrate != G_MAXINT)
|
|
gst_structure_set (s1, "framerate", GST_TYPE_FRACTION_RANGE,
|
|
min_num, min_denom, maxrate, 1, NULL);
|
|
else {
|
|
gst_structure_free (s1);
|
|
s1 = NULL;
|
|
}
|
|
}
|
|
|
|
if (direction == GST_PAD_SRC) {
|
|
/* We can accept anything as long as it's at least the minimal framerate
|
|
* the the sink needs */
|
|
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE,
|
|
min_num, min_denom, G_MAXINT, 1, NULL);
|
|
|
|
/* Also allow unknown framerate, if it isn't already */
|
|
if (min_num != 0 || min_denom != 1) {
|
|
s3 = gst_structure_copy (s);
|
|
gst_structure_set (s3, "framerate", GST_TYPE_FRACTION, 0, 1, NULL);
|
|
}
|
|
} else if (max_num != 0 || max_denom != 1) {
|
|
/* We can provide everything upto the maximum framerate at the src */
|
|
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE,
|
|
0, 1, max_num, max_denom, NULL);
|
|
}
|
|
} else if (direction == GST_PAD_SINK) {
|
|
gint min_num = 0, min_denom = 1;
|
|
gint max_num = G_MAXINT, max_denom = 1;
|
|
|
|
if (!gst_video_max_rate_clamp_structure (s1, maxrate,
|
|
&min_num, &min_denom, &max_num, &max_denom)) {
|
|
gst_structure_free (s1);
|
|
s1 = NULL;
|
|
}
|
|
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
|
|
maxrate, 1, NULL);
|
|
} else {
|
|
/* set the framerate as a range */
|
|
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
|
|
G_MAXINT, 1, NULL);
|
|
}
|
|
if (s1 != NULL)
|
|
ret = gst_caps_merge_structure_full (ret, s1,
|
|
gst_caps_features_copy (gst_caps_get_features (caps, i)));
|
|
ret = gst_caps_merge_structure_full (ret, s2,
|
|
gst_caps_features_copy (gst_caps_get_features (caps, i)));
|
|
if (s3 != NULL)
|
|
ret = gst_caps_merge_structure_full (ret, s3,
|
|
gst_caps_features_copy (gst_caps_get_features (caps, i)));
|
|
}
|
|
if (filter) {
|
|
GstCaps *intersection;
|
|
|
|
intersection =
|
|
gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
|
|
gst_caps_unref (ret);
|
|
ret = intersection;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_video_rate_fixate_caps (GstBaseTransform * trans,
|
|
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
|
|
{
|
|
GstStructure *s;
|
|
gint num, denom;
|
|
|
|
s = gst_caps_get_structure (caps, 0);
|
|
if (G_UNLIKELY (!gst_structure_get_fraction (s, "framerate", &num, &denom)))
|
|
return othercaps;
|
|
|
|
othercaps = gst_caps_truncate (othercaps);
|
|
othercaps = gst_caps_make_writable (othercaps);
|
|
s = gst_caps_get_structure (othercaps, 0);
|
|
gst_structure_fixate_field_nearest_fraction (s, "framerate", num, denom);
|
|
|
|
return othercaps;
|
|
}
|
|
|
|
static gboolean
|
|
gst_video_rate_setcaps (GstBaseTransform * trans, GstCaps * in_caps,
|
|
GstCaps * out_caps)
|
|
{
|
|
GstVideoRate *videorate = GST_VIDEO_RATE (trans);
|
|
GstStructure *structure;
|
|
gboolean ret = TRUE;
|
|
gint rate_numerator, rate_denominator;
|
|
|
|
GST_DEBUG_OBJECT (trans, "setcaps called in: %" GST_PTR_FORMAT
|
|
" out: %" GST_PTR_FORMAT, in_caps, out_caps);
|
|
|
|
structure = gst_caps_get_structure (in_caps, 0);
|
|
if (!gst_structure_get_fraction (structure, "framerate",
|
|
&rate_numerator, &rate_denominator))
|
|
goto no_framerate;
|
|
|
|
videorate->from_rate_numerator = rate_numerator;
|
|
videorate->from_rate_denominator = rate_denominator;
|
|
|
|
structure = gst_caps_get_structure (out_caps, 0);
|
|
if (!gst_structure_get_fraction (structure, "framerate",
|
|
&rate_numerator, &rate_denominator))
|
|
goto no_framerate;
|
|
|
|
/* out_frame_count is scaled by the frame rate caps when calculating next_ts.
|
|
* when the frame rate caps change, we must update base_ts and reset
|
|
* out_frame_count */
|
|
if (videorate->to_rate_numerator) {
|
|
videorate->base_ts +=
|
|
gst_util_uint64_scale (videorate->out_frame_count,
|
|
videorate->to_rate_denominator * GST_SECOND,
|
|
videorate->to_rate_numerator);
|
|
}
|
|
videorate->out_frame_count = 0;
|
|
videorate->to_rate_numerator = rate_numerator;
|
|
videorate->to_rate_denominator = rate_denominator;
|
|
|
|
if (rate_numerator)
|
|
videorate->wanted_diff = gst_util_uint64_scale_int (GST_SECOND,
|
|
rate_denominator, rate_numerator);
|
|
else
|
|
videorate->wanted_diff = 0;
|
|
|
|
done:
|
|
/* After a setcaps, our caps may have changed. In that case, we can't use
|
|
* the old buffer, if there was one (it might have different dimensions) */
|
|
GST_DEBUG_OBJECT (videorate, "swapping old buffers");
|
|
gst_video_rate_swap_prev (videorate, NULL, GST_CLOCK_TIME_NONE);
|
|
videorate->last_ts = GST_CLOCK_TIME_NONE;
|
|
videorate->average = 0;
|
|
|
|
return ret;
|
|
|
|
no_framerate:
|
|
{
|
|
GST_DEBUG_OBJECT (videorate, "no framerate specified");
|
|
ret = FALSE;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_video_rate_reset (GstVideoRate * videorate)
|
|
{
|
|
GST_DEBUG_OBJECT (videorate, "resetting internal variables");
|
|
|
|
videorate->in = 0;
|
|
videorate->out = 0;
|
|
videorate->base_ts = 0;
|
|
videorate->out_frame_count = 0;
|
|
videorate->drop = 0;
|
|
videorate->dup = 0;
|
|
videorate->next_ts = GST_CLOCK_TIME_NONE;
|
|
videorate->last_ts = GST_CLOCK_TIME_NONE;
|
|
videorate->discont = TRUE;
|
|
videorate->average = 0;
|
|
videorate->force_variable_rate = FALSE;
|
|
gst_video_rate_swap_prev (videorate, NULL, 0);
|
|
|
|
gst_segment_init (&videorate->segment, GST_FORMAT_TIME);
|
|
}
|
|
|
|
static void
|
|
gst_video_rate_init (GstVideoRate * videorate)
|
|
{
|
|
gst_video_rate_reset (videorate);
|
|
videorate->silent = DEFAULT_SILENT;
|
|
videorate->new_pref = DEFAULT_NEW_PREF;
|
|
videorate->drop_only = DEFAULT_DROP_ONLY;
|
|
videorate->average_period = DEFAULT_AVERAGE_PERIOD;
|
|
videorate->average_period_set = DEFAULT_AVERAGE_PERIOD;
|
|
videorate->max_rate = DEFAULT_MAX_RATE;
|
|
|
|
videorate->from_rate_numerator = 0;
|
|
videorate->from_rate_denominator = 0;
|
|
videorate->to_rate_numerator = 0;
|
|
videorate->to_rate_denominator = 0;
|
|
|
|
gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (videorate), TRUE);
|
|
}
|
|
|
|
/* flush the oldest buffer */
|
|
static GstFlowReturn
|
|
gst_video_rate_flush_prev (GstVideoRate * videorate, gboolean duplicate)
|
|
{
|
|
GstFlowReturn res;
|
|
GstBuffer *outbuf;
|
|
GstClockTime push_ts;
|
|
|
|
if (!videorate->prevbuf)
|
|
goto eos_before_buffers;
|
|
|
|
/* make sure we can write to the metadata */
|
|
outbuf = gst_buffer_make_writable (gst_buffer_ref (videorate->prevbuf));
|
|
|
|
GST_BUFFER_OFFSET (outbuf) = videorate->out;
|
|
GST_BUFFER_OFFSET_END (outbuf) = videorate->out + 1;
|
|
|
|
if (videorate->discont) {
|
|
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
|
|
videorate->discont = FALSE;
|
|
} else
|
|
GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DISCONT);
|
|
|
|
if (duplicate)
|
|
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP);
|
|
else
|
|
GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_GAP);
|
|
|
|
/* this is the timestamp we put on the buffer */
|
|
push_ts = videorate->next_ts;
|
|
|
|
videorate->out++;
|
|
videorate->out_frame_count++;
|
|
if (videorate->to_rate_numerator) {
|
|
/* interpolate next expected timestamp in the segment */
|
|
videorate->next_ts =
|
|
videorate->segment.base + videorate->segment.start +
|
|
videorate->base_ts + gst_util_uint64_scale (videorate->out_frame_count,
|
|
videorate->to_rate_denominator * GST_SECOND,
|
|
videorate->to_rate_numerator);
|
|
GST_BUFFER_DURATION (outbuf) = videorate->next_ts - push_ts;
|
|
} else if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_DURATION (outbuf))) {
|
|
videorate->next_ts = GST_BUFFER_PTS (outbuf) + GST_BUFFER_DURATION (outbuf);
|
|
}
|
|
|
|
/* We do not need to update time in VFR (variable frame rate) mode */
|
|
if (!videorate->drop_only) {
|
|
/* adapt for looping, bring back to time in current segment. */
|
|
GST_BUFFER_TIMESTAMP (outbuf) = push_ts - videorate->segment.base;
|
|
}
|
|
|
|
GST_LOG_OBJECT (videorate,
|
|
"old is best, dup, pushing buffer outgoing ts %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (push_ts));
|
|
|
|
res = gst_pad_push (GST_BASE_TRANSFORM_SRC_PAD (videorate), outbuf);
|
|
|
|
return res;
|
|
|
|
/* WARNINGS */
|
|
eos_before_buffers:
|
|
{
|
|
GST_INFO_OBJECT (videorate, "got EOS before any buffer was received");
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_video_rate_swap_prev (GstVideoRate * videorate, GstBuffer * buffer,
|
|
gint64 time)
|
|
{
|
|
GST_LOG_OBJECT (videorate, "swap_prev: storing buffer %p in prev", buffer);
|
|
if (videorate->prevbuf)
|
|
gst_buffer_unref (videorate->prevbuf);
|
|
videorate->prevbuf = buffer != NULL ? gst_buffer_ref (buffer) : NULL;
|
|
videorate->prev_ts = time;
|
|
}
|
|
|
|
static void
|
|
gst_video_rate_notify_drop (GstVideoRate * videorate)
|
|
{
|
|
g_object_notify_by_pspec ((GObject *) videorate, pspec_drop);
|
|
}
|
|
|
|
static void
|
|
gst_video_rate_notify_duplicate (GstVideoRate * videorate)
|
|
{
|
|
g_object_notify_by_pspec ((GObject *) videorate, pspec_duplicate);
|
|
}
|
|
|
|
#define MAGIC_LIMIT 25
|
|
static gboolean
|
|
gst_video_rate_sink_event (GstBaseTransform * trans, GstEvent * event)
|
|
{
|
|
GstVideoRate *videorate;
|
|
|
|
videorate = GST_VIDEO_RATE (trans);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEGMENT:
|
|
{
|
|
const GstSegment *segment;
|
|
|
|
gst_event_parse_segment (event, &segment);
|
|
|
|
if (segment->format != GST_FORMAT_TIME)
|
|
goto format_error;
|
|
|
|
GST_DEBUG_OBJECT (videorate, "handle NEWSEGMENT");
|
|
|
|
/* close up the previous segment, if appropriate */
|
|
if (videorate->prevbuf) {
|
|
gint count = 0;
|
|
GstFlowReturn res;
|
|
|
|
res = GST_FLOW_OK;
|
|
/* fill up to the end of current segment,
|
|
* or only send out the stored buffer if there is no specific stop.
|
|
* regardless, prevent going loopy in strange cases */
|
|
while (res == GST_FLOW_OK && count <= MAGIC_LIMIT &&
|
|
((GST_CLOCK_TIME_IS_VALID (videorate->segment.stop) &&
|
|
videorate->next_ts - videorate->segment.base
|
|
< videorate->segment.stop)
|
|
|| count < 1)) {
|
|
res = gst_video_rate_flush_prev (videorate, count > 0);
|
|
count++;
|
|
}
|
|
if (count > 1) {
|
|
videorate->dup += count - 1;
|
|
if (!videorate->silent)
|
|
gst_video_rate_notify_duplicate (videorate);
|
|
} else if (count == 0) {
|
|
videorate->drop++;
|
|
if (!videorate->silent)
|
|
gst_video_rate_notify_drop (videorate);
|
|
}
|
|
/* clean up for the new one; _chain will resume from the new start */
|
|
gst_video_rate_swap_prev (videorate, NULL, 0);
|
|
}
|
|
|
|
videorate->base_ts = 0;
|
|
videorate->out_frame_count = 0;
|
|
videorate->next_ts = GST_CLOCK_TIME_NONE;
|
|
|
|
/* We just want to update the accumulated stream_time */
|
|
gst_segment_copy_into (segment, &videorate->segment);
|
|
|
|
GST_DEBUG_OBJECT (videorate, "updated segment: %" GST_SEGMENT_FORMAT,
|
|
&videorate->segment);
|
|
break;
|
|
}
|
|
case GST_EVENT_EOS:{
|
|
gint count = 0;
|
|
GstFlowReturn res = GST_FLOW_OK;
|
|
|
|
GST_DEBUG_OBJECT (videorate, "Got EOS");
|
|
|
|
/* If the segment has a stop position, fill the segment */
|
|
if (GST_CLOCK_TIME_IS_VALID (videorate->segment.stop)) {
|
|
/* fill up to the end of current segment,
|
|
* or only send out the stored buffer if there is no specific stop.
|
|
* regardless, prevent going loopy in strange cases */
|
|
while (res == GST_FLOW_OK && count <= MAGIC_LIMIT &&
|
|
((videorate->next_ts - videorate->segment.base <
|
|
videorate->segment.stop)
|
|
|| count < 1)) {
|
|
res = gst_video_rate_flush_prev (videorate, count > 0);
|
|
count++;
|
|
}
|
|
} else if (videorate->prevbuf) {
|
|
/* Output at least one frame but if the buffer duration is valid, output
|
|
* enough frames to use the complete buffer duration */
|
|
if (GST_BUFFER_DURATION_IS_VALID (videorate->prevbuf)) {
|
|
GstClockTime end_ts =
|
|
videorate->next_ts + GST_BUFFER_DURATION (videorate->prevbuf);
|
|
|
|
while (res == GST_FLOW_OK && count <= MAGIC_LIMIT &&
|
|
((videorate->next_ts - videorate->segment.base < end_ts)
|
|
|| count < 1)) {
|
|
res = gst_video_rate_flush_prev (videorate, count > 0);
|
|
count++;
|
|
}
|
|
} else {
|
|
res = gst_video_rate_flush_prev (videorate, FALSE);
|
|
count = 1;
|
|
}
|
|
}
|
|
|
|
if (count > 1) {
|
|
videorate->dup += count - 1;
|
|
if (!videorate->silent)
|
|
gst_video_rate_notify_duplicate (videorate);
|
|
} else if (count == 0) {
|
|
videorate->drop++;
|
|
if (!videorate->silent)
|
|
gst_video_rate_notify_drop (videorate);
|
|
}
|
|
|
|
break;
|
|
}
|
|
case GST_EVENT_FLUSH_STOP:
|
|
/* also resets the segment */
|
|
GST_DEBUG_OBJECT (videorate, "Got FLUSH_STOP");
|
|
gst_video_rate_reset (videorate);
|
|
break;
|
|
case GST_EVENT_GAP:
|
|
/* no gaps after videorate, ignore the event */
|
|
gst_event_unref (event);
|
|
return TRUE;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
|
|
|
|
/* ERRORS */
|
|
format_error:
|
|
{
|
|
GST_WARNING_OBJECT (videorate,
|
|
"Got segment but doesn't have GST_FORMAT_TIME value");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_video_rate_query (GstBaseTransform * trans, GstPadDirection direction,
|
|
GstQuery * query)
|
|
{
|
|
GstVideoRate *videorate = GST_VIDEO_RATE (trans);
|
|
gboolean res = FALSE;
|
|
GstPad *otherpad;
|
|
|
|
otherpad = (direction == GST_PAD_SRC) ?
|
|
GST_BASE_TRANSFORM_SINK_PAD (trans) : GST_BASE_TRANSFORM_SRC_PAD (trans);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_LATENCY:
|
|
{
|
|
GstClockTime min, max;
|
|
gboolean live;
|
|
guint64 latency;
|
|
guint64 avg_period;
|
|
gboolean drop_only;
|
|
GstPad *peer;
|
|
|
|
GST_OBJECT_LOCK (videorate);
|
|
avg_period = videorate->average_period_set;
|
|
drop_only = videorate->drop_only;
|
|
GST_OBJECT_UNLOCK (videorate);
|
|
|
|
if (avg_period == 0 && (peer = gst_pad_get_peer (otherpad))) {
|
|
if ((res = gst_pad_query (peer, query))) {
|
|
gst_query_parse_latency (query, &live, &min, &max);
|
|
|
|
GST_DEBUG_OBJECT (videorate, "Peer latency: min %"
|
|
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
|
|
|
|
/* Drop only has no latency, other modes have one frame latency */
|
|
if (!drop_only && videorate->from_rate_numerator != 0) {
|
|
/* add latency. We don't really know since we hold on to the frames
|
|
* until we get a next frame, which can be anything. We assume
|
|
* however that this will take from_rate time. */
|
|
latency = gst_util_uint64_scale (GST_SECOND,
|
|
videorate->from_rate_denominator,
|
|
videorate->from_rate_numerator);
|
|
} else {
|
|
/* no input framerate, we don't know */
|
|
latency = 0;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (videorate, "Our latency: %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (latency));
|
|
|
|
min += latency;
|
|
if (max != -1)
|
|
max += latency;
|
|
|
|
GST_DEBUG_OBJECT (videorate, "Calculated total latency : min %"
|
|
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
|
|
|
|
gst_query_set_latency (query, live, min, max);
|
|
}
|
|
gst_object_unref (peer);
|
|
break;
|
|
}
|
|
/* Simple fallthrough if we don't have a latency or not a peer that we
|
|
* can't ask about its latency yet.. */
|
|
}
|
|
default:
|
|
res =
|
|
GST_BASE_TRANSFORM_CLASS (parent_class)->query (trans, direction,
|
|
query);
|
|
break;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_video_rate_propose_allocation (GstBaseTransform * trans,
|
|
GstQuery * decide_query, GstQuery * query)
|
|
{
|
|
GstBaseTransformClass *klass = GST_BASE_TRANSFORM_CLASS (parent_class);
|
|
gboolean res;
|
|
|
|
/* We should always be passthrough */
|
|
g_return_val_if_fail (decide_query == NULL, FALSE);
|
|
|
|
res = klass->propose_allocation (trans, NULL, query);
|
|
|
|
if (res) {
|
|
guint i = 0;
|
|
guint n_allocation;
|
|
guint down_min = 0;
|
|
|
|
n_allocation = gst_query_get_n_allocation_pools (query);
|
|
|
|
while (i < n_allocation) {
|
|
GstBufferPool *pool = NULL;
|
|
guint size, min, max;
|
|
|
|
gst_query_parse_nth_allocation_pool (query, i, &pool, &size, &min, &max);
|
|
|
|
if (min == max) {
|
|
if (pool)
|
|
gst_object_unref (pool);
|
|
gst_query_remove_nth_allocation_pool (query, i);
|
|
n_allocation--;
|
|
down_min = MAX (min, down_min);
|
|
continue;
|
|
}
|
|
|
|
gst_query_set_nth_allocation_pool (query, i, pool, size, min + 1, max);
|
|
if (pool)
|
|
gst_object_unref (pool);
|
|
i++;
|
|
}
|
|
|
|
if (n_allocation == 0) {
|
|
GstCaps *caps;
|
|
GstVideoInfo info;
|
|
|
|
gst_query_parse_allocation (query, &caps, NULL);
|
|
gst_video_info_from_caps (&info, caps);
|
|
|
|
gst_query_add_allocation_pool (query, NULL, info.size, down_min + 1, 0);
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_video_rate_trans_ip_max_avg (GstVideoRate * videorate, GstBuffer * buf)
|
|
{
|
|
GstClockTime ts = GST_BUFFER_TIMESTAMP (buf);
|
|
|
|
videorate->in++;
|
|
|
|
if (!GST_CLOCK_TIME_IS_VALID (ts) || videorate->wanted_diff == 0)
|
|
goto push;
|
|
|
|
/* drop frames if they exceed our output rate */
|
|
if (GST_CLOCK_TIME_IS_VALID (videorate->last_ts)) {
|
|
GstClockTimeDiff diff = ts - videorate->last_ts;
|
|
|
|
/* Drop buffer if its early compared to the desired frame rate and
|
|
* the current average is higher than the desired average
|
|
*/
|
|
if (diff < videorate->wanted_diff &&
|
|
videorate->average < videorate->wanted_diff)
|
|
goto drop;
|
|
|
|
/* Update average */
|
|
if (videorate->average) {
|
|
GstClockTimeDiff wanted_diff;
|
|
|
|
if (G_LIKELY (videorate->average_period > videorate->wanted_diff))
|
|
wanted_diff = videorate->wanted_diff;
|
|
else
|
|
wanted_diff = videorate->average_period * 10;
|
|
|
|
videorate->average =
|
|
gst_util_uint64_scale_round (videorate->average,
|
|
videorate->average_period - wanted_diff,
|
|
videorate->average_period) +
|
|
gst_util_uint64_scale_round (diff, wanted_diff,
|
|
videorate->average_period);
|
|
} else {
|
|
videorate->average = diff;
|
|
}
|
|
}
|
|
|
|
videorate->last_ts = ts;
|
|
|
|
push:
|
|
videorate->out++;
|
|
return GST_FLOW_OK;
|
|
|
|
drop:
|
|
if (!videorate->silent)
|
|
gst_video_rate_notify_drop (videorate);
|
|
return GST_BASE_TRANSFORM_FLOW_DROPPED;
|
|
}
|
|
|
|
/* Check if downstream forces variable framerate (0/1) and if
|
|
* it is the case, use variable framerate ourself
|
|
* Otherwise compute the framerate from the 2 buffers that we
|
|
* have already received and make use of it as wanted framerate
|
|
*/
|
|
static void
|
|
gst_video_rate_check_variable_rate (GstVideoRate * videorate,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstStructure *st;
|
|
gint fps_d, fps_n;
|
|
GstCaps *srcpadcaps, *tmpcaps;
|
|
GstPad *pad = NULL;
|
|
|
|
srcpadcaps =
|
|
gst_pad_get_current_caps (GST_BASE_TRANSFORM_SRC_PAD (videorate));
|
|
|
|
gst_video_guess_framerate (GST_BUFFER_PTS (buffer) -
|
|
GST_BUFFER_PTS (videorate->prevbuf), &fps_n, &fps_d);
|
|
|
|
tmpcaps = gst_caps_copy (srcpadcaps);
|
|
st = gst_caps_get_structure (tmpcaps, 0);
|
|
gst_structure_set (st, "framerate", GST_TYPE_FRACTION, fps_n, fps_d, NULL);
|
|
gst_caps_unref (srcpadcaps);
|
|
|
|
pad = gst_pad_get_peer (GST_BASE_TRANSFORM_SRC_PAD (videorate));
|
|
if (pad && !gst_pad_query_accept_caps (pad, tmpcaps)) {
|
|
videorate->force_variable_rate = TRUE;
|
|
GST_DEBUG_OBJECT (videorate, "Downstream forces variable framerate"
|
|
" respecting it");
|
|
|
|
goto done;
|
|
}
|
|
|
|
videorate->to_rate_numerator = fps_n;
|
|
videorate->to_rate_denominator = fps_d;
|
|
|
|
GST_INFO_OBJECT (videorate, "Computed framerate to %d/%d",
|
|
videorate->to_rate_numerator, videorate->to_rate_denominator);
|
|
|
|
videorate->updating_caps = TRUE;
|
|
gst_base_transform_update_src_caps (GST_BASE_TRANSFORM (videorate), tmpcaps);
|
|
|
|
done:
|
|
gst_caps_unref (tmpcaps);
|
|
if (pad)
|
|
gst_object_unref (pad);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_video_rate_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
|
|
{
|
|
GstVideoRate *videorate;
|
|
GstFlowReturn res = GST_BASE_TRANSFORM_FLOW_DROPPED;
|
|
GstClockTime intime, in_ts, in_dur;
|
|
GstClockTime avg_period;
|
|
gboolean skip = FALSE;
|
|
|
|
videorate = GST_VIDEO_RATE (trans);
|
|
|
|
/* make sure the denominators are not 0 */
|
|
if (videorate->from_rate_denominator == 0 ||
|
|
videorate->to_rate_denominator == 0)
|
|
goto not_negotiated;
|
|
|
|
if (videorate->to_rate_numerator == 0 && videorate->prevbuf &&
|
|
!videorate->force_variable_rate) {
|
|
gst_video_rate_check_variable_rate (videorate, buffer);
|
|
}
|
|
|
|
GST_OBJECT_LOCK (videorate);
|
|
avg_period = videorate->average_period_set;
|
|
GST_OBJECT_UNLOCK (videorate);
|
|
|
|
/* MT-safe switching between modes */
|
|
if (G_UNLIKELY (avg_period != videorate->average_period)) {
|
|
gboolean switch_mode = (avg_period == 0 || videorate->average_period == 0);
|
|
videorate->average_period = avg_period;
|
|
videorate->last_ts = GST_CLOCK_TIME_NONE;
|
|
|
|
if (switch_mode) {
|
|
if (avg_period) {
|
|
/* enabling average mode */
|
|
videorate->average = 0;
|
|
/* make sure no cached buffers from regular mode are left */
|
|
gst_video_rate_swap_prev (videorate, NULL, 0);
|
|
} else {
|
|
/* enable regular mode */
|
|
videorate->next_ts = GST_CLOCK_TIME_NONE;
|
|
skip = TRUE;
|
|
}
|
|
|
|
/* max averaging mode has a no latency, normal mode does */
|
|
gst_element_post_message (GST_ELEMENT (videorate),
|
|
gst_message_new_latency (GST_OBJECT (videorate)));
|
|
}
|
|
}
|
|
|
|
if (videorate->average_period > 0)
|
|
return gst_video_rate_trans_ip_max_avg (videorate, buffer);
|
|
|
|
in_ts = GST_BUFFER_TIMESTAMP (buffer);
|
|
in_dur = GST_BUFFER_DURATION (buffer);
|
|
|
|
if (G_UNLIKELY (in_ts == GST_CLOCK_TIME_NONE)) {
|
|
in_ts = videorate->last_ts;
|
|
if (G_UNLIKELY (in_ts == GST_CLOCK_TIME_NONE))
|
|
goto invalid_buffer;
|
|
}
|
|
|
|
/* get the time of the next expected buffer timestamp, we use this when the
|
|
* next buffer has -1 as a timestamp */
|
|
videorate->last_ts = in_ts;
|
|
if (in_dur != GST_CLOCK_TIME_NONE)
|
|
videorate->last_ts += in_dur;
|
|
|
|
GST_DEBUG_OBJECT (videorate, "got buffer with timestamp %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (in_ts));
|
|
|
|
/* the input time is the time in the segment + all previously accumulated
|
|
* segments */
|
|
intime = in_ts + videorate->segment.base;
|
|
|
|
/* we need to have two buffers to compare */
|
|
if (videorate->prevbuf == NULL || videorate->drop_only) {
|
|
gst_video_rate_swap_prev (videorate, buffer, intime);
|
|
videorate->in++;
|
|
if (!GST_CLOCK_TIME_IS_VALID (videorate->next_ts)) {
|
|
/* new buffer, we expect to output a buffer that matches the first
|
|
* timestamp in the segment */
|
|
if (videorate->skip_to_first || skip) {
|
|
videorate->next_ts = intime;
|
|
videorate->base_ts = in_ts - videorate->segment.start;
|
|
videorate->out_frame_count = 0;
|
|
} else {
|
|
videorate->next_ts = videorate->segment.start + videorate->segment.base;
|
|
}
|
|
}
|
|
|
|
/* In drop-only mode we can already decide here if we should output the
|
|
* current frame or drop it because it's coming earlier than our minimum
|
|
* allowed frame period. This also keeps latency down to 0 frames
|
|
*/
|
|
if (videorate->drop_only) {
|
|
if (intime >= videorate->next_ts) {
|
|
GstFlowReturn r;
|
|
|
|
/* on error the _flush function posted a warning already */
|
|
if ((r = gst_video_rate_flush_prev (videorate, FALSE)) != GST_FLOW_OK) {
|
|
res = r;
|
|
goto done;
|
|
}
|
|
}
|
|
/* No need to keep the buffer around for longer */
|
|
gst_buffer_replace (&videorate->prevbuf, NULL);
|
|
}
|
|
} else {
|
|
GstClockTime prevtime;
|
|
gint count = 0;
|
|
gint64 diff1, diff2;
|
|
|
|
prevtime = videorate->prev_ts;
|
|
|
|
GST_LOG_OBJECT (videorate,
|
|
"BEGINNING prev buf %" GST_TIME_FORMAT " new buf %" GST_TIME_FORMAT
|
|
" outgoing ts %" GST_TIME_FORMAT, GST_TIME_ARGS (prevtime),
|
|
GST_TIME_ARGS (intime), GST_TIME_ARGS (videorate->next_ts));
|
|
|
|
videorate->in++;
|
|
|
|
/* drop new buffer if it's before previous one */
|
|
if (intime < prevtime) {
|
|
GST_DEBUG_OBJECT (videorate,
|
|
"The new buffer (%" GST_TIME_FORMAT
|
|
") is before the previous buffer (%"
|
|
GST_TIME_FORMAT "). Dropping new buffer.",
|
|
GST_TIME_ARGS (intime), GST_TIME_ARGS (prevtime));
|
|
videorate->drop++;
|
|
if (!videorate->silent)
|
|
gst_video_rate_notify_drop (videorate);
|
|
goto done;
|
|
}
|
|
|
|
/* got 2 buffers, see which one is the best */
|
|
do {
|
|
|
|
diff1 = prevtime - videorate->next_ts;
|
|
diff2 = intime - videorate->next_ts;
|
|
|
|
/* take absolute values, beware: abs and ABS don't work for gint64 */
|
|
if (diff1 < 0)
|
|
diff1 = -diff1;
|
|
if (diff2 < 0)
|
|
diff2 = -diff2;
|
|
|
|
GST_LOG_OBJECT (videorate,
|
|
"diff with prev %" GST_TIME_FORMAT " diff with new %"
|
|
GST_TIME_FORMAT " outgoing ts %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (diff1), GST_TIME_ARGS (diff2),
|
|
GST_TIME_ARGS (videorate->next_ts));
|
|
|
|
if (!GST_BUFFER_DURATION_IS_VALID (videorate->prevbuf) &&
|
|
intime > prevtime) {
|
|
/* Make sure that we have a duration for previous buffer */
|
|
GST_BUFFER_DURATION (videorate->prevbuf) = intime - prevtime;
|
|
}
|
|
|
|
/* output first one when its the best */
|
|
if (diff1 <= diff2) {
|
|
GstFlowReturn r;
|
|
count++;
|
|
|
|
/* on error the _flush function posted a warning already */
|
|
if ((r = gst_video_rate_flush_prev (videorate,
|
|
count > 1)) != GST_FLOW_OK) {
|
|
res = r;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* Do not produce any dups. We can exit loop now */
|
|
if (videorate->drop_only)
|
|
break;
|
|
/* continue while the first one was the best, if they were equal avoid
|
|
* going into an infinite loop */
|
|
}
|
|
while (diff1 < diff2);
|
|
|
|
/* if we outputed the first buffer more then once, we have dups */
|
|
if (count > 1) {
|
|
videorate->dup += count - 1;
|
|
if (!videorate->silent)
|
|
gst_video_rate_notify_duplicate (videorate);
|
|
}
|
|
/* if we didn't output the first buffer, we have a drop */
|
|
else if (count == 0) {
|
|
videorate->drop++;
|
|
|
|
if (!videorate->silent)
|
|
gst_video_rate_notify_drop (videorate);
|
|
|
|
GST_LOG_OBJECT (videorate,
|
|
"new is best, old never used, drop, outgoing ts %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (videorate->next_ts));
|
|
}
|
|
GST_LOG_OBJECT (videorate,
|
|
"END, putting new in old, diff1 %" GST_TIME_FORMAT
|
|
", diff2 %" GST_TIME_FORMAT ", next_ts %" GST_TIME_FORMAT
|
|
", in %" G_GUINT64_FORMAT ", out %" G_GUINT64_FORMAT ", drop %"
|
|
G_GUINT64_FORMAT ", dup %" G_GUINT64_FORMAT, GST_TIME_ARGS (diff1),
|
|
GST_TIME_ARGS (diff2), GST_TIME_ARGS (videorate->next_ts),
|
|
videorate->in, videorate->out, videorate->drop, videorate->dup);
|
|
|
|
/* swap in new one when it's the best */
|
|
gst_video_rate_swap_prev (videorate, buffer, intime);
|
|
}
|
|
done:
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
not_negotiated:
|
|
{
|
|
GST_WARNING_OBJECT (videorate, "no framerate negotiated");
|
|
res = GST_FLOW_NOT_NEGOTIATED;
|
|
goto done;
|
|
}
|
|
|
|
invalid_buffer:
|
|
{
|
|
GST_WARNING_OBJECT (videorate,
|
|
"Got buffer with GST_CLOCK_TIME_NONE timestamp, discarding it");
|
|
res = GST_BASE_TRANSFORM_FLOW_DROPPED;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_video_rate_start (GstBaseTransform * trans)
|
|
{
|
|
gst_video_rate_reset (GST_VIDEO_RATE (trans));
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_video_rate_stop (GstBaseTransform * trans)
|
|
{
|
|
gst_video_rate_reset (GST_VIDEO_RATE (trans));
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_video_rate_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstVideoRate *videorate = GST_VIDEO_RATE (object);
|
|
gboolean latency_changed = FALSE;
|
|
|
|
GST_OBJECT_LOCK (videorate);
|
|
switch (prop_id) {
|
|
case PROP_SILENT:
|
|
videorate->silent = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_NEW_PREF:
|
|
videorate->new_pref = g_value_get_double (value);
|
|
break;
|
|
case PROP_SKIP_TO_FIRST:
|
|
videorate->skip_to_first = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_DROP_ONLY:{
|
|
gboolean new_value = g_value_get_boolean (value);
|
|
|
|
/* Latency changes if we switch drop-only mode */
|
|
latency_changed = new_value != videorate->drop_only;
|
|
videorate->drop_only = g_value_get_boolean (value);
|
|
goto reconfigure;
|
|
break;
|
|
}
|
|
case PROP_AVERAGE_PERIOD:
|
|
videorate->average_period_set = g_value_get_uint64 (value);
|
|
break;
|
|
case PROP_MAX_RATE:
|
|
g_atomic_int_set (&videorate->max_rate, g_value_get_int (value));
|
|
goto reconfigure;
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
GST_OBJECT_UNLOCK (videorate);
|
|
return;
|
|
|
|
reconfigure:
|
|
GST_OBJECT_UNLOCK (videorate);
|
|
gst_base_transform_reconfigure_src (GST_BASE_TRANSFORM (videorate));
|
|
|
|
if (latency_changed) {
|
|
gst_element_post_message (GST_ELEMENT (videorate),
|
|
gst_message_new_latency (GST_OBJECT (videorate)));
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_video_rate_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstVideoRate *videorate = GST_VIDEO_RATE (object);
|
|
|
|
GST_OBJECT_LOCK (videorate);
|
|
switch (prop_id) {
|
|
case PROP_IN:
|
|
g_value_set_uint64 (value, videorate->in);
|
|
break;
|
|
case PROP_OUT:
|
|
g_value_set_uint64 (value, videorate->out);
|
|
break;
|
|
case PROP_DUP:
|
|
g_value_set_uint64 (value, videorate->dup);
|
|
break;
|
|
case PROP_DROP:
|
|
g_value_set_uint64 (value, videorate->drop);
|
|
break;
|
|
case PROP_SILENT:
|
|
g_value_set_boolean (value, videorate->silent);
|
|
break;
|
|
case PROP_NEW_PREF:
|
|
g_value_set_double (value, videorate->new_pref);
|
|
break;
|
|
case PROP_SKIP_TO_FIRST:
|
|
g_value_set_boolean (value, videorate->skip_to_first);
|
|
break;
|
|
case PROP_DROP_ONLY:
|
|
g_value_set_boolean (value, videorate->drop_only);
|
|
break;
|
|
case PROP_AVERAGE_PERIOD:
|
|
g_value_set_uint64 (value, videorate->average_period_set);
|
|
break;
|
|
case PROP_MAX_RATE:
|
|
g_value_set_int (value, g_atomic_int_get (&videorate->max_rate));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
GST_OBJECT_UNLOCK (videorate);
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (video_rate_debug, "videorate", 0,
|
|
"VideoRate stream fixer");
|
|
|
|
return gst_element_register (plugin, "videorate", GST_RANK_NONE,
|
|
GST_TYPE_VIDEO_RATE);
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
videorate,
|
|
"Adjusts video frames",
|
|
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
|