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796 lines
23 KiB
C
796 lines
23 KiB
C
/* GStreamer
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* Copyright (C) 2013 Mathieu Duponchelle <mduponchelle1@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
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* Boston, MA 02110-1335, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <math.h>
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include "gstframepositioner.h"
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#include "ges-internal.h"
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GST_DEBUG_CATEGORY_STATIC (_framepositioner);
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#undef GST_CAT_DEFAULT
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#define GST_CAT_DEFAULT _framepositioner
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/* We need to define a max number of pixel so we can interpolate them */
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#define MAX_PIXELS 100000
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#define MIN_PIXELS -100000
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static void gst_frame_positioner_set_property (GObject * object,
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guint property_id, const GValue * value, GParamSpec * pspec);
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static void gst_frame_positioner_get_property (GObject * object,
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guint property_id, GValue * value, GParamSpec * pspec);
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static GstFlowReturn gst_frame_positioner_transform_ip (GstBaseTransform *
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trans, GstBuffer * buf);
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static gboolean
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gst_frame_positioner_meta_init (GstMeta * meta, gpointer params,
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GstBuffer * buffer);
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static gboolean gst_frame_positioner_meta_transform (GstBuffer * dest,
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GstMeta * meta, GstBuffer * buffer, GQuark type, gpointer data);
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enum
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{
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PROP_0,
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PROP_ALPHA,
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PROP_POSX,
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PROP_POSY,
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PROP_ZORDER,
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PROP_WIDTH,
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PROP_HEIGHT,
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PROP_OPERATOR,
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PROP_LAST,
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};
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static GParamSpec *properties[PROP_LAST];
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static GstStaticPadTemplate gst_frame_positioner_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw(ANY)")
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);
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static GstStaticPadTemplate gst_frame_positioner_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw(ANY)")
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);
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G_DEFINE_TYPE (GstFramePositioner, gst_frame_positioner,
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GST_TYPE_BASE_TRANSFORM);
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GType
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gst_compositor_operator_get_type_and_default_value (int *default_operator_value)
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{
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static gsize _init = 0;
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static int operator_value = 0;
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static GType operator_gtype = G_TYPE_NONE;
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if (g_once_init_enter (&_init)) {
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GstElement *compositor =
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gst_element_factory_create (ges_get_compositor_factory (), NULL);
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GstPad *compositorPad =
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gst_element_request_pad_simple (compositor, "sink_%u");
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GParamSpec *pspec =
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g_object_class_find_property (G_OBJECT_GET_CLASS (compositorPad),
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"operator");
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if (pspec) {
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operator_value =
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g_value_get_enum (g_param_spec_get_default_value (pspec));
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operator_gtype = pspec->value_type;
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}
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gst_element_release_request_pad (compositor, compositorPad);
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gst_object_unref (compositorPad);
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gst_object_unref (compositor);
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g_once_init_leave (&_init, 1);
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}
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if (default_operator_value)
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*default_operator_value = operator_value;
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return operator_gtype;
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}
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static void
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_weak_notify_cb (GstFramePositioner * pos, GObject * old)
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{
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pos->current_track = NULL;
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}
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static gboolean
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is_user_positionned (GstFramePositioner * self)
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{
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gint i;
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GParamSpec *positioning_props[] = {
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properties[PROP_WIDTH],
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properties[PROP_HEIGHT],
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properties[PROP_POSX],
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properties[PROP_POSY],
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};
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if (self->user_positioned)
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return TRUE;
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for (i = 0; i < G_N_ELEMENTS (positioning_props); i++) {
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GstControlBinding *b = gst_object_get_control_binding (GST_OBJECT (self),
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positioning_props[i]->name);
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if (b) {
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gst_object_unref (b);
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return TRUE;
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}
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}
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return FALSE;
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}
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static gboolean
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auto_position (GstFramePositioner * self)
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{
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gdouble scaled_width = -1, scaled_height = -1, x, y;
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if (is_user_positionned (self)) {
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GST_DEBUG_OBJECT (self, "Was positioned by the user, not auto positioning");
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return FALSE;
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}
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if (!self->natural_width || !self->natural_height)
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return FALSE;
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if (self->track_width == self->natural_width &&
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self->track_height == self->natural_height)
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return TRUE;
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scaled_height =
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gst_util_uint64_scale_int (self->natural_height, self->track_width,
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self->natural_width);
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scaled_width = self->track_width;
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if (scaled_height > self->track_height) {
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scaled_height = self->track_height;
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scaled_width =
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gst_util_uint64_scale_int (self->natural_width, self->track_height,
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self->natural_height);
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}
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x = MAX (0, (self->track_width - scaled_width) / 2.f);
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y = MAX (0, (self->track_height - scaled_height) / 2.f);
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GST_INFO_OBJECT (self, "Scalling video to match track size from "
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"%dx%d to %fx%f",
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self->natural_width, self->natural_height, scaled_width, scaled_height);
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self->width = scaled_width;
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self->height = scaled_height;
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self->posx = x;
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self->posy = y;
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return TRUE;
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}
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typedef struct
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{
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gdouble *value;
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gint old_track_value;
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gint track_value;
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GParamSpec *pspec;
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} RepositionPropertyData;
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static void
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reposition_properties (GstFramePositioner * pos, gint old_track_width,
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gint old_track_height)
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{
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gint i;
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RepositionPropertyData props_data[] = {
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{&pos->width, old_track_width, pos->track_width, properties[PROP_WIDTH]},
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{&pos->height, old_track_height, pos->track_height,
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properties[PROP_HEIGHT]},
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{&pos->posx, old_track_width, pos->track_width, properties[PROP_POSX]},
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{&pos->posy, old_track_height, pos->track_height, properties[PROP_POSY]},
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};
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for (i = 0; i < G_N_ELEMENTS (props_data); i++) {
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GList *values, *tmp;
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gboolean absolute;
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GstTimedValueControlSource *source = NULL;
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RepositionPropertyData d = props_data[i];
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GstControlBinding *binding =
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gst_object_get_control_binding (GST_OBJECT (pos), d.pspec->name);
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*(d.value) =
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*(d.value) * (gdouble) d.track_value / (gdouble) d.old_track_value;
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if (!binding)
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continue;
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if (!GST_IS_DIRECT_CONTROL_BINDING (binding)) {
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GST_FIXME_OBJECT (pos, "Implement support for control binding type: %s",
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G_OBJECT_TYPE_NAME (binding));
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goto next;
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}
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g_object_get (binding, "control_source", &source, NULL);
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if (!source || !GST_IS_TIMED_VALUE_CONTROL_SOURCE (source)) {
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GST_FIXME_OBJECT (pos, "Implement support for control source type: %s",
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source ? G_OBJECT_TYPE_NAME (source) : "NULL");
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goto next;
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}
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values =
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gst_timed_value_control_source_get_all (GST_TIMED_VALUE_CONTROL_SOURCE
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(source));
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if (!values)
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goto next;
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g_object_get (binding, "absolute", &absolute, NULL);
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for (tmp = values; tmp; tmp = tmp->next) {
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GstTimedValue *value = tmp->data;
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gst_timed_value_control_source_set (source, value->timestamp,
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value->value * d.track_value / d.old_track_value);
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}
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g_list_free (values);
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next:
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gst_clear_object (&source);
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gst_object_unref (binding);
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}
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}
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static void
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gst_frame_positioner_update_properties (GstFramePositioner * pos,
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gboolean track_mixing, gint old_track_width, gint old_track_height)
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{
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GstCaps *caps;
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if (pos->capsfilter == NULL)
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return;
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caps = gst_caps_from_string ("video/x-raw(ANY)");
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if (pos->track_width && pos->track_height &&
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(!track_mixing || !pos->scale_in_compositor)) {
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gst_caps_set_simple (caps, "width", G_TYPE_INT,
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pos->track_width, "height", G_TYPE_INT, pos->track_height, NULL);
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}
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if (pos->fps_n != -1)
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gst_caps_set_simple (caps, "framerate", GST_TYPE_FRACTION, pos->fps_n,
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pos->fps_d, NULL);
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if (pos->par_n != -1)
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gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
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pos->par_n, pos->par_d, NULL);
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if (!pos->track_width || !pos->track_height) {
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GST_INFO_OBJECT (pos, "Track doesn't have a proper size, not "
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"positioning the source");
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goto done;
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} else if (auto_position (pos))
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goto done;
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if (!old_track_height || !old_track_width) {
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GST_DEBUG_OBJECT (pos, "No old track size, can not properly reposition");
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goto done;
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}
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if ((!pos->natural_width || !pos->natural_height) &&
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(!pos->width || !pos->height)) {
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GST_DEBUG_OBJECT (pos, "No natural aspect ratio and no user set "
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" image size, can't not reposition.");
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goto done;
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}
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if (gst_util_fraction_compare (old_track_width, old_track_height,
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pos->track_width, pos->track_height)) {
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GST_INFO_OBJECT (pos, "Not repositioning as track size change didn't"
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" keep the same aspect ratio (previous %dx%d("
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"ratio=%f), new: %dx%d(ratio=%f)",
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old_track_width, old_track_height,
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(gdouble) old_track_width / (gdouble) old_track_height,
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pos->track_width, pos->track_height,
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(gdouble) pos->track_width / (gdouble) pos->track_height);
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goto done;
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}
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reposition_properties (pos, old_track_width, old_track_height);
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done:
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GST_DEBUG_OBJECT (pos, "setting caps %" GST_PTR_FORMAT, caps);
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g_object_set (pos->capsfilter, "caps", caps, NULL);
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gst_caps_unref (caps);
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}
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static void
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sync_properties_from_track (GstFramePositioner * pos, GESTrack * track)
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{
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gint width, height;
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gint old_track_width, old_track_height;
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GstCaps *caps;
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g_object_get (track, "restriction-caps", &caps, NULL);
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width = height = 0;
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if (caps && gst_caps_get_size (caps) > 0) {
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GstStructure *structure;
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structure = gst_caps_get_structure (caps, 0);
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if (!gst_structure_get_int (structure, "width", &width))
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width = 0;
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if (!gst_structure_get_int (structure, "height", &height))
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height = 0;
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if (!gst_structure_get_fraction (structure, "framerate", &(pos->fps_n),
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&(pos->fps_d)))
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pos->fps_n = -1;
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if (!gst_structure_get_fraction (structure, "pixel-aspect-ratio",
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&(pos->par_n), &(pos->par_d)))
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pos->par_n = -1;
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}
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old_track_width = pos->track_width;
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old_track_height = pos->track_height;
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pos->track_width = width;
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pos->track_height = height;
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GST_DEBUG_OBJECT (pos, "syncing framerate from caps : %d/%d", pos->fps_n,
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pos->fps_d);
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if (caps)
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gst_caps_unref (caps);
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gst_frame_positioner_update_properties (pos, ges_track_get_mixing (track),
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old_track_width, old_track_height);
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}
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static void
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_track_restriction_changed_cb (GESTrack * track, GParamSpec * arg G_GNUC_UNUSED,
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GstFramePositioner * pos)
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{
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sync_properties_from_track (pos, track);
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}
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static void
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set_track (GstFramePositioner * pos)
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{
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GESTrack *new_track;
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if (pos->current_track) {
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g_signal_handlers_disconnect_by_func (pos->current_track,
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(GCallback) _track_restriction_changed_cb, pos);
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g_object_weak_unref (G_OBJECT (pos->current_track),
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(GWeakNotify) _weak_notify_cb, pos);
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}
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new_track = ges_track_element_get_track (pos->track_source);
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if (new_track) {
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pos->current_track = new_track;
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g_object_weak_ref (G_OBJECT (new_track), (GWeakNotify) _weak_notify_cb,
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pos);
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GST_DEBUG_OBJECT (pos, "connecting to track : %p", pos->current_track);
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g_signal_connect (pos->current_track, "notify::restriction-caps",
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(GCallback) _track_restriction_changed_cb, pos);
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sync_properties_from_track (pos, pos->current_track);
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} else {
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pos->current_track = NULL;
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}
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}
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static void
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_track_changed_cb (GESTrackElement * trksrc, GParamSpec * arg G_GNUC_UNUSED,
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GstFramePositioner * pos)
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{
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set_track (pos);
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}
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static void
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_trk_element_weak_notify_cb (GstFramePositioner * pos, GObject * old)
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{
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pos->track_source = NULL;
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gst_object_unref (pos);
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}
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void
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ges_frame_positioner_set_source_and_filter (GstFramePositioner * pos,
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GESTrackElement * trksrc, GstElement * capsfilter)
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{
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pos->track_source = trksrc;
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pos->capsfilter = capsfilter;
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pos->current_track = ges_track_element_get_track (trksrc);
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g_object_weak_ref (G_OBJECT (trksrc),
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(GWeakNotify) _trk_element_weak_notify_cb, gst_object_ref (pos));
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g_signal_connect (trksrc, "notify::track", (GCallback) _track_changed_cb,
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pos);
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set_track (pos);
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}
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static void
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gst_frame_positioner_dispose (GObject * object)
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{
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GstFramePositioner *pos = GST_FRAME_POSITIONNER (object);
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if (pos->track_source) {
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g_signal_handlers_disconnect_by_func (pos->track_source, _track_changed_cb,
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pos);
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pos->track_source = NULL;
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}
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if (pos->current_track) {
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g_signal_handlers_disconnect_by_func (pos->current_track,
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_track_restriction_changed_cb, pos);
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g_object_weak_unref (G_OBJECT (pos->current_track),
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(GWeakNotify) _weak_notify_cb, pos);
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pos->current_track = NULL;
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}
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G_OBJECT_CLASS (gst_frame_positioner_parent_class)->dispose (object);
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}
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static void
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gst_frame_positioner_class_init (GstFramePositionerClass * klass)
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{
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int default_operator_value = 0;
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GType operator_gtype =
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gst_compositor_operator_get_type_and_default_value
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(&default_operator_value);
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guint n_pspecs = PROP_LAST;
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstBaseTransformClass *base_transform_class =
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GST_BASE_TRANSFORM_CLASS (klass);
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GST_DEBUG_CATEGORY_INIT (_framepositioner, "framepositioner",
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GST_DEBUG_FG_YELLOW, "ges frame positioner");
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gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass),
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&gst_frame_positioner_src_template);
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gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass),
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&gst_frame_positioner_sink_template);
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gobject_class->set_property = gst_frame_positioner_set_property;
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gobject_class->get_property = gst_frame_positioner_get_property;
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gobject_class->dispose = gst_frame_positioner_dispose;
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base_transform_class->transform_ip =
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GST_DEBUG_FUNCPTR (gst_frame_positioner_transform_ip);
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/**
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* gstframepositioner:alpha:
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*
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* The desired alpha for the stream.
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*/
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properties[PROP_ALPHA] =
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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);
|
|
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* 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_POSY:
|
|
framepositioner->posy = g_value_get_int (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_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_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);
|
|
gint 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_POSY:
|
|
g_value_set_int (value, round (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 ? round (pos->width) : round (pos->track_width);
|
|
g_value_set_int (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 ? round (pos->height) : round (pos->track_height);
|
|
g_value_set_int (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;
|
|
}
|
|
}
|
|
|
|
GType
|
|
gst_frame_positioner_meta_api_get_type (void)
|
|
{
|
|
static GType type;
|
|
static const gchar *tags[] = { "video", NULL };
|
|
|
|
if (g_once_init_enter (&type)) {
|
|
GType _type = gst_meta_api_type_register ("GstFramePositionerApi", tags);
|
|
g_once_init_leave (&type, _type);
|
|
}
|
|
return type;
|
|
}
|
|
|
|
static const GstMetaInfo *
|
|
gst_frame_positioner_get_info (void)
|
|
{
|
|
static const GstMetaInfo *meta_info = NULL;
|
|
|
|
if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
|
|
const GstMetaInfo *meta =
|
|
gst_meta_register (gst_frame_positioner_meta_api_get_type (),
|
|
"GstFramePositionerMeta",
|
|
sizeof (GstFramePositionerMeta), gst_frame_positioner_meta_init,
|
|
NULL,
|
|
gst_frame_positioner_meta_transform);
|
|
g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) meta);
|
|
}
|
|
return meta_info;
|
|
}
|
|
|
|
static gboolean
|
|
gst_frame_positioner_meta_init (GstMeta * meta, gpointer params,
|
|
GstBuffer * buffer)
|
|
{
|
|
int default_operator_value = 0;
|
|
GstFramePositionerMeta *smeta;
|
|
|
|
smeta = (GstFramePositionerMeta *) meta;
|
|
|
|
gst_compositor_operator_get_type_and_default_value (&default_operator_value);
|
|
|
|
smeta->alpha = 0.0;
|
|
smeta->posx = smeta->posy = smeta->height = smeta->width = 0;
|
|
smeta->zorder = 0;
|
|
smeta->operator = default_operator_value;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_frame_positioner_meta_transform (GstBuffer * dest, GstMeta * meta,
|
|
GstBuffer * buffer, GQuark type, gpointer data)
|
|
{
|
|
GstFramePositionerMeta *dmeta, *smeta;
|
|
|
|
smeta = (GstFramePositionerMeta *) meta;
|
|
|
|
if (GST_META_TRANSFORM_IS_COPY (type)) {
|
|
/* only copy if the complete data is copied as well */
|
|
dmeta =
|
|
(GstFramePositionerMeta *) gst_buffer_add_meta (dest,
|
|
gst_frame_positioner_get_info (), NULL);
|
|
dmeta->alpha = smeta->alpha;
|
|
dmeta->posx = smeta->posx;
|
|
dmeta->posy = smeta->posy;
|
|
dmeta->width = smeta->width;
|
|
dmeta->height = smeta->height;
|
|
dmeta->zorder = smeta->zorder;
|
|
dmeta->operator = smeta->operator;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_frame_positioner_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
|
|
{
|
|
GstFramePositionerMeta *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 =
|
|
(GstFramePositionerMeta *) gst_buffer_add_meta (buf,
|
|
gst_frame_positioner_get_info (), NULL);
|
|
|
|
GST_OBJECT_LOCK (framepositioner);
|
|
meta->alpha = framepositioner->alpha;
|
|
meta->posx = round (framepositioner->posx);
|
|
meta->posy = round (framepositioner->posy);
|
|
meta->width = round (framepositioner->width);
|
|
meta->height = round (framepositioner->height);
|
|
meta->zorder = framepositioner->zorder;
|
|
meta->operator = framepositioner->operator;
|
|
GST_OBJECT_UNLOCK (framepositioner);
|
|
|
|
return GST_FLOW_OK;
|
|
}
|