gstreamer/subprojects/gst-editing-services/ges/gstframepositioner.c
Thibault Saunier 14d6773aba ges: framepositioner: Expose positioning properties as doubles
Making it possible to properly handle compositors that have those
properties as doubles and handle antialiasing.

Internally we were handling those values as doubles in framepositioner,
so expose new properties so user can set values as doubles also.

This changes the GESFramePositionMeta API but we are still on time for 1.24

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6241>
2024-02-29 00:56:30 +00:00

894 lines
26 KiB
C

/* GStreamer
* Copyright (C) 2013 Mathieu Duponchelle <mduponchelle1@gmail.com>
*
* 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 Street, Suite 500,
* Boston, MA 02110-1335, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <gst/gst.h>
#include <gst/video/video.h>
#include "gstframepositioner.h"
#include "ges-frame-composition-meta.h"
#include "ges-internal.h"
GST_DEBUG_CATEGORY_STATIC (_framepositioner);
#undef GST_CAT_DEFAULT
#define GST_CAT_DEFAULT _framepositioner
/* We need to define a max number of pixel so we can interpolate them */
#define MAX_PIXELS 100000
#define MIN_PIXELS -100000
static void gst_frame_positioner_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_frame_positioner_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static GstFlowReturn gst_frame_positioner_transform_ip (GstBaseTransform *
trans, GstBuffer * buf);
enum
{
PROP_0,
PROP_ALPHA,
PROP_POSX,
PROP_FPOSX,
PROP_POSY,
PROP_FPOSY,
PROP_WIDTH,
PROP_FWIDTH,
PROP_HEIGHT,
PROP_FHEIGHT,
PROP_ZORDER,
PROP_OPERATOR,
PROP_LAST,
};
static GParamSpec *properties[PROP_LAST];
static GstStaticPadTemplate gst_frame_positioner_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw(ANY)")
);
static GstStaticPadTemplate gst_frame_positioner_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw(ANY)")
);
G_DEFINE_TYPE (GstFramePositioner, gst_frame_positioner,
GST_TYPE_BASE_TRANSFORM);
GType
gst_compositor_operator_get_type_and_default_value (int *default_operator_value)
{
static gsize _init = 0;
static int operator_value = 0;
static GType operator_gtype = G_TYPE_NONE;
if (g_once_init_enter (&_init)) {
GstElement *compositor =
gst_element_factory_create (ges_get_compositor_factory (), NULL);
GstPad *compositorPad =
gst_element_request_pad_simple (compositor, "sink_%u");
GParamSpec *pspec =
g_object_class_find_property (G_OBJECT_GET_CLASS (compositorPad),
"operator");
if (pspec) {
operator_value =
g_value_get_enum (g_param_spec_get_default_value (pspec));
operator_gtype = pspec->value_type;
}
gst_element_release_request_pad (compositor, compositorPad);
gst_object_unref (compositorPad);
gst_object_unref (compositor);
g_once_init_leave (&_init, 1);
}
if (default_operator_value)
*default_operator_value = operator_value;
return operator_gtype;
}
static gboolean
scales_downstream (GstFramePositioner * self)
{
if (self->scale_in_compositor)
return TRUE;
if (!self->track_source)
return self->scale_in_compositor;
GESTimelineElement *parent = GES_TIMELINE_ELEMENT_PARENT (self->track_source);
if (!parent || !GES_IS_CLIP (parent)) {
return self->scale_in_compositor;
}
return ges_clip_has_scale_effect (GES_CLIP (parent));
}
static void
_weak_notify_cb (GstFramePositioner * pos, GObject * old)
{
pos->current_track = NULL;
}
static gboolean
is_user_positionned (GstFramePositioner * self)
{
gint i;
GParamSpec *positioning_props[] = {
properties[PROP_WIDTH],
properties[PROP_FWIDTH],
properties[PROP_HEIGHT],
properties[PROP_FHEIGHT],
properties[PROP_POSX],
properties[PROP_FPOSX],
properties[PROP_POSY],
properties[PROP_FPOSY],
};
if (self->user_positioned)
return TRUE;
for (i = 0; i < G_N_ELEMENTS (positioning_props); i++) {
GstControlBinding *b = gst_object_get_control_binding (GST_OBJECT (self),
positioning_props[i]->name);
if (b) {
gst_object_unref (b);
return TRUE;
}
}
return FALSE;
}
static gboolean
auto_position (GstFramePositioner * self)
{
gdouble scaled_width = -1, scaled_height = -1, x, y;
if (is_user_positionned (self)) {
GST_DEBUG_OBJECT (self, "Was positioned by the user, not auto positioning");
return FALSE;
}
if (!self->natural_width || !self->natural_height)
return FALSE;
if (self->track_width == self->natural_width &&
self->track_height == self->natural_height)
return TRUE;
scaled_height =
gst_util_uint64_scale_int (self->natural_height, self->track_width,
self->natural_width);
scaled_width = self->track_width;
if (scaled_height > self->track_height) {
scaled_height = self->track_height;
scaled_width =
gst_util_uint64_scale_int (self->natural_width, self->track_height,
self->natural_height);
}
x = MAX (0, (self->track_width - scaled_width) / 2.f);
y = MAX (0, (self->track_height - scaled_height) / 2.f);
GST_INFO_OBJECT (self, "Scalling video to match track size from "
"%dx%d to %fx%f",
self->natural_width, self->natural_height, scaled_width, scaled_height);
self->width = scaled_width;
self->height = scaled_height;
self->posx = x;
self->posy = y;
return TRUE;
}
typedef struct
{
gdouble *value;
gint old_track_value;
gint track_value;
GParamSpec *pspec;
} RepositionPropertyData;
static void
reposition_properties (GstFramePositioner * pos, gint old_track_width,
gint old_track_height)
{
gint i;
/* *INDENT-OFF* */
RepositionPropertyData props_data[] = {
{&pos->width, old_track_width, pos->track_width, properties[PROP_FWIDTH]},
{&pos->width, old_track_width, pos->track_width, properties[PROP_WIDTH]},
{&pos->height, old_track_height, pos->track_height, properties[PROP_FHEIGHT]},
{&pos->height, old_track_height, pos->track_height, properties[PROP_HEIGHT]},
{&pos->posx, old_track_width, pos->track_width, properties[PROP_FPOSX]},
{&pos->posx, old_track_width, pos->track_width, properties[PROP_POSX]},
{&pos->posy, old_track_height, pos->track_height, properties[PROP_FPOSY]},
{&pos->posy, old_track_height, pos->track_height, properties[PROP_POSY]},
};
/* *INDENT-ON* */
for (i = 0; i < G_N_ELEMENTS (props_data); i++) {
GList *values, *tmp;
gboolean absolute;
GstTimedValueControlSource *source = NULL;
RepositionPropertyData d = props_data[i];
GstControlBinding *binding =
gst_object_get_control_binding (GST_OBJECT (pos), d.pspec->name);
if (G_PARAM_SPEC_VALUE_TYPE (d.pspec) == G_TYPE_FLOAT) {
*(d.value) =
*(d.value) * (gdouble) d.track_value / (gdouble) d.old_track_value;
}
if (!binding)
continue;
if (!GST_IS_DIRECT_CONTROL_BINDING (binding)) {
GST_FIXME_OBJECT (pos, "Implement support for control binding type: %s",
G_OBJECT_TYPE_NAME (binding));
goto next;
}
g_object_get (binding, "control_source", &source, NULL);
if (!source || !GST_IS_TIMED_VALUE_CONTROL_SOURCE (source)) {
GST_FIXME_OBJECT (pos, "Implement support for control source type: %s",
source ? G_OBJECT_TYPE_NAME (source) : "NULL");
goto next;
}
values =
gst_timed_value_control_source_get_all (GST_TIMED_VALUE_CONTROL_SOURCE
(source));
if (!values)
goto next;
g_object_get (binding, "absolute", &absolute, NULL);
for (tmp = values; tmp; tmp = tmp->next) {
GstTimedValue *value = tmp->data;
gst_timed_value_control_source_set (source, value->timestamp,
value->value * d.track_value / d.old_track_value);
}
g_list_free (values);
next:
gst_clear_object (&source);
gst_object_unref (binding);
}
}
static void
gst_frame_positioner_update_properties (GstFramePositioner * pos,
gboolean track_mixing, gint old_track_width, gint old_track_height)
{
GstCaps *caps;
if (pos->capsfilter == NULL)
return;
caps = gst_caps_from_string ("video/x-raw(ANY)");
if (pos->track_width && pos->track_height &&
(!track_mixing || !scales_downstream (pos))) {
gst_caps_set_simple (caps, "width", G_TYPE_INT,
pos->track_width, "height", G_TYPE_INT, pos->track_height, NULL);
}
if (pos->fps_n != -1)
gst_caps_set_simple (caps, "framerate", GST_TYPE_FRACTION, pos->fps_n,
pos->fps_d, NULL);
if (pos->par_n != -1)
gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
pos->par_n, pos->par_d, NULL);
if (!pos->track_width || !pos->track_height) {
GST_INFO_OBJECT (pos, "Track doesn't have a proper size, not "
"positioning the source");
goto done;
} else if (auto_position (pos))
goto done;
if (!old_track_height || !old_track_width) {
GST_DEBUG_OBJECT (pos, "No old track size, can not properly reposition");
goto done;
}
if ((!pos->natural_width || !pos->natural_height) &&
(!pos->width || !pos->height)) {
GST_DEBUG_OBJECT (pos, "No natural aspect ratio and no user set "
" image size, can't not reposition.");
goto done;
}
if (gst_util_fraction_compare (old_track_width, old_track_height,
pos->track_width, pos->track_height)) {
GST_INFO_OBJECT (pos, "Not repositioning as track size change didn't"
" keep the same aspect ratio (previous %dx%d("
"ratio=%f), new: %dx%d(ratio=%f)",
old_track_width, old_track_height,
(gdouble) old_track_width / (gdouble) old_track_height,
pos->track_width, pos->track_height,
(gdouble) pos->track_width / (gdouble) pos->track_height);
goto done;
}
reposition_properties (pos, old_track_width, old_track_height);
done:
if (scales_downstream (pos) && pos->natural_width && pos->natural_height) {
GST_DEBUG_OBJECT (pos,
"Forcing natural width in source make downstream scaling work");
gst_caps_set_simple (caps, "width", G_TYPE_INT, pos->natural_width,
"height", G_TYPE_INT, pos->natural_height, NULL);
}
GST_DEBUG_OBJECT (pos, "setting caps %" GST_PTR_FORMAT, caps);
g_object_set (pos->capsfilter, "caps", caps, NULL);
gst_caps_unref (caps);
}
static void
sync_properties_from_track (GstFramePositioner * pos, GESTrack * track)
{
gint width, height;
gint old_track_width, old_track_height;
GstCaps *caps;
g_object_get (track, "restriction-caps", &caps, NULL);
width = height = 0;
if (caps && gst_caps_get_size (caps) > 0) {
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "width", &width))
width = 0;
if (!gst_structure_get_int (structure, "height", &height))
height = 0;
if (!gst_structure_get_fraction (structure, "framerate", &(pos->fps_n),
&(pos->fps_d)))
pos->fps_n = -1;
if (!gst_structure_get_fraction (structure, "pixel-aspect-ratio",
&(pos->par_n), &(pos->par_d)))
pos->par_n = -1;
}
old_track_width = pos->track_width;
old_track_height = pos->track_height;
pos->track_width = width;
pos->track_height = height;
GST_DEBUG_OBJECT (pos, "syncing framerate from caps : %d/%d", pos->fps_n,
pos->fps_d);
if (caps)
gst_caps_unref (caps);
gst_frame_positioner_update_properties (pos, ges_track_get_mixing (track),
old_track_width, old_track_height);
}
static void
_track_restriction_changed_cb (GESTrack * track, GParamSpec * arg G_GNUC_UNUSED,
GstFramePositioner * pos)
{
sync_properties_from_track (pos, track);
}
static void
set_track (GstFramePositioner * pos)
{
GESTrack *new_track;
if (pos->current_track) {
g_signal_handlers_disconnect_by_func (pos->current_track,
(GCallback) _track_restriction_changed_cb, pos);
g_object_weak_unref (G_OBJECT (pos->current_track),
(GWeakNotify) _weak_notify_cb, pos);
}
new_track = ges_track_element_get_track (pos->track_source);
if (new_track) {
pos->current_track = new_track;
g_object_weak_ref (G_OBJECT (new_track), (GWeakNotify) _weak_notify_cb,
pos);
GST_DEBUG_OBJECT (pos, "connecting to track : %p", pos->current_track);
g_signal_connect (pos->current_track, "notify::restriction-caps",
(GCallback) _track_restriction_changed_cb, pos);
sync_properties_from_track (pos, pos->current_track);
} else {
pos->current_track = NULL;
}
}
static void
_track_changed_cb (GESTrackElement * trksrc, GParamSpec * arg G_GNUC_UNUSED,
GstFramePositioner * pos)
{
set_track (pos);
}
static void
_trk_element_weak_notify_cb (GstFramePositioner * pos, GObject * old)
{
pos->track_source = NULL;
gst_object_unref (pos);
}
void
ges_frame_positioner_set_source_and_filter (GstFramePositioner * pos,
GESTrackElement * trksrc, GstElement * capsfilter)
{
pos->track_source = trksrc;
pos->capsfilter = capsfilter;
pos->current_track = ges_track_element_get_track (trksrc);
g_object_weak_ref (G_OBJECT (trksrc),
(GWeakNotify) _trk_element_weak_notify_cb, gst_object_ref (pos));
g_signal_connect (trksrc, "notify::track", (GCallback) _track_changed_cb,
pos);
set_track (pos);
}
static void
gst_frame_positioner_dispose (GObject * object)
{
GstFramePositioner *pos = GST_FRAME_POSITIONNER (object);
if (pos->track_source) {
g_signal_handlers_disconnect_by_func (pos->track_source, _track_changed_cb,
pos);
pos->track_source = NULL;
}
if (pos->current_track) {
g_signal_handlers_disconnect_by_func (pos->current_track,
_track_restriction_changed_cb, pos);
g_object_weak_unref (G_OBJECT (pos->current_track),
(GWeakNotify) _weak_notify_cb, pos);
pos->current_track = NULL;
}
G_OBJECT_CLASS (gst_frame_positioner_parent_class)->dispose (object);
}
static void
gst_frame_positioner_class_init (GstFramePositionerClass * klass)
{
int default_operator_value = 0;
GType operator_gtype =
gst_compositor_operator_get_type_and_default_value
(&default_operator_value);
guint n_pspecs = PROP_LAST;
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstBaseTransformClass *base_transform_class =
GST_BASE_TRANSFORM_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (_framepositioner, "gesframepositioner",
GST_DEBUG_FG_YELLOW, "ges frame positioner");
gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass),
&gst_frame_positioner_src_template);
gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass),
&gst_frame_positioner_sink_template);
gobject_class->set_property = gst_frame_positioner_set_property;
gobject_class->get_property = gst_frame_positioner_get_property;
gobject_class->dispose = gst_frame_positioner_dispose;
base_transform_class->transform_ip =
GST_DEBUG_FUNCPTR (gst_frame_positioner_transform_ip);
/**
* gstframepositioner:alpha:
*
* The desired alpha for the stream.
*/
properties[PROP_ALPHA] =
g_param_spec_double ("alpha", "alpha", "alpha of the stream", 0.0, 1.0,
1.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE);
/**
* gstframepositioner:posx:
*
* The desired x position for the stream.
*/
properties[PROP_POSX] =
g_param_spec_int ("posx", "posx", "x position of the stream",
MIN_PIXELS, MAX_PIXELS, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_LAX_VALIDATION);
/**
* gstframepositioner:fposx:
*
* The desired x position for the stream.
*/
properties[PROP_FPOSX] =
g_param_spec_float ("fposx", "fposx", "x position of the stream in float",
MIN_PIXELS, MAX_PIXELS, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_LAX_VALIDATION);
/**
* gstframepositioner:posy:
*
* The desired y position for the stream.
*/
properties[PROP_POSY] =
g_param_spec_int ("posy", "posy", "y position of the stream",
MIN_PIXELS, MAX_PIXELS, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_LAX_VALIDATION);
/**
* gstframepositioner:fposy:
*
* The desired y position for the stream.
*/
properties[PROP_FPOSY] =
g_param_spec_float ("fposy", "fposy", "y position of the stream in float",
MIN_PIXELS, MAX_PIXELS, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_LAX_VALIDATION);
/**
* gstframepositioner:zorder:
*
* The desired z order for the stream.
*/
properties[PROP_ZORDER] =
g_param_spec_uint ("zorder", "zorder", "z order of the stream", 0,
G_MAXUINT, 0, G_PARAM_READWRITE);
/**
* gesframepositioner:width:
*
* The desired width for that source.
* Set to 0 if size is not mandatory, will be set to width of the current track.
*/
properties[PROP_WIDTH] =
g_param_spec_int ("width", "width", "width of the source", 0,
MAX_PIXELS, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_LAX_VALIDATION);
/**
* gesframepositioner:fwidth:
*
* The desired width for that source.
* Set to 0 if size is not mandatory, will be set to width of the current track.
*/
properties[PROP_FWIDTH] =
g_param_spec_float ("fwidth", "fwidth", "width of the source in float", 0,
MAX_PIXELS, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_LAX_VALIDATION);
/**
* gesframepositioner:height:
*
* The desired height for that source.
* Set to 0 if size is not mandatory, will be set to height of the current track.
*/
properties[PROP_HEIGHT] =
g_param_spec_int ("height", "height", "height of the source", 0,
MAX_PIXELS, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_LAX_VALIDATION);
/**
* gesframepositioner:fheight:
*
* The desired height for that source.
* Set to 0 if size is not mandatory, will be set to height of the current track.
*/
properties[PROP_FHEIGHT] =
g_param_spec_float ("fheight", "fheight", "height of the source in float",
0, MAX_PIXELS, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_LAX_VALIDATION);
/**
* gesframepositioner:operator:
*
* The blending operator for the source.
*/
if (operator_gtype != G_TYPE_NONE) {
properties[PROP_OPERATOR] =
g_param_spec_enum ("operator", "Operator",
"Blending operator to use for blending this pad over the previous ones",
operator_gtype, default_operator_value,
(G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE |
GST_PARAM_CONDITIONALLY_AVAILABLE | G_PARAM_STATIC_STRINGS));
} else {
n_pspecs--;
}
g_object_class_install_properties (gobject_class, n_pspecs, properties);
gst_element_class_set_static_metadata (GST_ELEMENT_CLASS (klass),
"frame positioner", "Metadata",
"This element provides with tagging facilities",
"mduponchelle1@gmail.com");
}
static void
gst_frame_positioner_init (GstFramePositioner * framepositioner)
{
int default_operator_value;
gst_compositor_operator_get_type_and_default_value (&default_operator_value);
framepositioner->alpha = 1.0;
framepositioner->posx = 0.0;
framepositioner->posy = 0.0;
framepositioner->zorder = 0;
framepositioner->width = 0;
framepositioner->height = 0;
framepositioner->operator = default_operator_value;
framepositioner->fps_n = -1;
framepositioner->fps_d = -1;
framepositioner->track_width = 0;
framepositioner->track_height = 0;
framepositioner->capsfilter = NULL;
framepositioner->track_source = NULL;
framepositioner->current_track = NULL;
framepositioner->scale_in_compositor = TRUE;
framepositioner->par_n = -1;
framepositioner->par_d = 1;
}
void
gst_frame_positioner_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstFramePositioner *framepositioner = GST_FRAME_POSITIONNER (object);
gboolean track_mixing = TRUE;
if (framepositioner->current_track)
track_mixing = ges_track_get_mixing (framepositioner->current_track);
GST_OBJECT_LOCK (framepositioner);
switch (property_id) {
case PROP_ALPHA:
framepositioner->alpha = g_value_get_double (value);
break;
case PROP_POSX:
framepositioner->posx = g_value_get_int (value);
framepositioner->user_positioned = TRUE;
break;
case PROP_FPOSX:
framepositioner->posx = g_value_get_float (value);
framepositioner->user_positioned = TRUE;
break;
case PROP_POSY:
framepositioner->posy = g_value_get_int (value);
framepositioner->user_positioned = TRUE;
break;
case PROP_FPOSY:
framepositioner->posy = g_value_get_float (value);
framepositioner->user_positioned = TRUE;
break;
case PROP_ZORDER:
framepositioner->zorder = g_value_get_uint (value);
break;
case PROP_WIDTH:
framepositioner->user_positioned = TRUE;
framepositioner->width = g_value_get_int (value);
gst_frame_positioner_update_properties (framepositioner, track_mixing,
0, 0);
break;
case PROP_FWIDTH:
framepositioner->user_positioned = TRUE;
framepositioner->width = g_value_get_float (value);
gst_frame_positioner_update_properties (framepositioner, track_mixing,
0, 0);
break;
case PROP_HEIGHT:
framepositioner->user_positioned = TRUE;
framepositioner->height = g_value_get_int (value);
gst_frame_positioner_update_properties (framepositioner, track_mixing,
0, 0);
break;
case PROP_FHEIGHT:
framepositioner->user_positioned = TRUE;
framepositioner->height = g_value_get_float (value);
gst_frame_positioner_update_properties (framepositioner, track_mixing,
0, 0);
break;
case PROP_OPERATOR:
framepositioner->operator = g_value_get_enum (value);
gst_frame_positioner_update_properties (framepositioner, track_mixing,
0, 0);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
GST_OBJECT_UNLOCK (framepositioner);
}
void
gst_frame_positioner_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstFramePositioner *pos = GST_FRAME_POSITIONNER (object);
gdouble real_width, real_height;
switch (property_id) {
case PROP_ALPHA:
g_value_set_double (value, pos->alpha);
break;
case PROP_POSX:
g_value_set_int (value, round (pos->posx));
break;
case PROP_FPOSX:
g_value_set_float (value, pos->posx);
break;
case PROP_POSY:
g_value_set_int (value, round (pos->posy));
break;
case PROP_FPOSY:
g_value_set_float (value, pos->posy);
break;
case PROP_ZORDER:
g_value_set_uint (value, pos->zorder);
break;
case PROP_WIDTH:
if (pos->scale_in_compositor) {
g_value_set_int (value, round (pos->width));
} else {
real_width = pos->width > 0 ? pos->width : pos->track_width;
g_value_set_int (value, round (real_width));
}
break;
case PROP_FWIDTH:
if (pos->scale_in_compositor) {
g_value_set_float (value, pos->width);
} else {
real_width = pos->width > 0 ? pos->width : pos->track_width;
g_value_set_float (value, real_width);
}
break;
case PROP_HEIGHT:
if (pos->scale_in_compositor) {
g_value_set_int (value, round (pos->height));
} else {
real_height = pos->height > 0 ? pos->height : pos->track_height;
g_value_set_int (value, round (real_height));
}
break;
case PROP_FHEIGHT:
if (pos->scale_in_compositor) {
g_value_set_float (value, pos->height);
} else {
real_height = pos->height > 0 ? pos->height : pos->track_height;
g_value_set_float (value, real_height);
}
break;
case PROP_OPERATOR:
g_value_set_enum (value, pos->operator);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static GstFlowReturn
gst_frame_positioner_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
{
GESFrameCompositionMeta *meta;
GstFramePositioner *framepositioner = GST_FRAME_POSITIONNER (trans);
GstClockTime timestamp = GST_BUFFER_PTS (buf);
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
gst_object_sync_values (GST_OBJECT (trans), timestamp);
}
meta = ges_buffer_add_frame_composition_meta (buf);
GST_OBJECT_LOCK (framepositioner);
meta->alpha = framepositioner->alpha;
meta->posx = framepositioner->posx;
meta->posy = framepositioner->posy;
meta->width = framepositioner->width;
meta->height = framepositioner->height;
meta->zorder = framepositioner->zorder;
meta->operator = framepositioner->operator;
GST_OBJECT_UNLOCK (framepositioner);
return GST_FLOW_OK;
}
gboolean
gst_frame_positioner_check_can_add_binding (GstFramePositioner * self,
const gchar * property_name)
{
gint i = 0;
const gchar *checked_prop = NULL;
const gchar *props[][2] = {
{"posx", "fposx"},
{"posy", "fposy"},
{"width", "fwidth"},
{"height", "fheight"},
};
for (i = 0; i < G_N_ELEMENTS (props); i++) {
if (!g_strcmp0 (property_name, props[i][0])) {
checked_prop = props[i][1];
break;
} else if (!g_strcmp0 (property_name, props[i][1])) {
checked_prop = props[i][0];
break;
}
}
if (!checked_prop)
return TRUE;
GstControlBinding *b =
gst_object_get_control_binding (GST_OBJECT (self), checked_prop);
if (b) {
gst_object_unref (b);
GST_WARNING_OBJECT (self,
"Can't add control binding for %s as %s already has one", property_name,
checked_prop);
return FALSE;
}
return TRUE;
}