gstreamer/ext/gtk/gtkgstbasewidget.c
Thibault Saunier e80765c928 gtk: When setting format check if pending format changed
In case the format changed fast and the pending format is different
than the currently set but the currently set is equal to the pending
one we could end up having mismatch between the finally set format
and the data stream format.

https://bugzilla.gnome.org/show_bug.cgi?id=755542
2015-09-24 16:50:38 +02:00

491 lines
13 KiB
C

/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.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 St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include "gtkgstbasewidget.h"
#define DEFAULT_FORCE_ASPECT_RATIO TRUE
#define DEFAULT_PAR_N 0
#define DEFAULT_PAR_D 1
#define DEFAULT_IGNORE_ALPHA TRUE
enum
{
PROP_0,
PROP_FORCE_ASPECT_RATIO,
PROP_PIXEL_ASPECT_RATIO,
PROP_IGNORE_ALPHA,
};
static void
gtk_gst_base_widget_get_preferred_width (GtkWidget * widget, gint * min,
gint * natural)
{
GtkGstBaseWidget *gst_widget = (GtkGstBaseWidget *) widget;
gint video_width = gst_widget->display_width;
if (!gst_widget->negotiated)
video_width = 10;
if (min)
*min = 1;
if (natural)
*natural = video_width;
}
static void
gtk_gst_base_widget_get_preferred_height (GtkWidget * widget, gint * min,
gint * natural)
{
GtkGstBaseWidget *gst_widget = (GtkGstBaseWidget *) widget;
gint video_height = gst_widget->display_height;
if (!gst_widget->negotiated)
video_height = 10;
if (min)
*min = 1;
if (natural)
*natural = video_height;
}
static void
gtk_gst_base_widget_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GtkGstBaseWidget *gtk_widget = GTK_GST_BASE_WIDGET (object);
switch (prop_id) {
case PROP_FORCE_ASPECT_RATIO:
gtk_widget->force_aspect_ratio = g_value_get_boolean (value);
break;
case PROP_PIXEL_ASPECT_RATIO:
gtk_widget->par_n = gst_value_get_fraction_numerator (value);
gtk_widget->par_d = gst_value_get_fraction_denominator (value);
break;
case PROP_IGNORE_ALPHA:
gtk_widget->ignore_alpha = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_gst_base_widget_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GtkGstBaseWidget *gtk_widget = GTK_GST_BASE_WIDGET (object);
switch (prop_id) {
case PROP_FORCE_ASPECT_RATIO:
g_value_set_boolean (value, gtk_widget->force_aspect_ratio);
break;
case PROP_PIXEL_ASPECT_RATIO:
gst_value_set_fraction (value, gtk_widget->par_n, gtk_widget->par_d);
break;
case PROP_IGNORE_ALPHA:
g_value_set_boolean (value, gtk_widget->ignore_alpha);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
_calculate_par (GtkGstBaseWidget * widget, GstVideoInfo * info)
{
gboolean ok;
gint width, height;
gint par_n, par_d;
gint display_par_n, display_par_d;
width = GST_VIDEO_INFO_WIDTH (info);
height = GST_VIDEO_INFO_HEIGHT (info);
par_n = GST_VIDEO_INFO_PAR_N (info);
par_d = GST_VIDEO_INFO_PAR_D (info);
if (!par_n)
par_n = 1;
/* get display's PAR */
if (widget->par_n != 0 && widget->par_d != 0) {
display_par_n = widget->par_n;
display_par_d = widget->par_d;
} else {
display_par_n = 1;
display_par_d = 1;
}
ok = gst_video_calculate_display_ratio (&widget->display_ratio_num,
&widget->display_ratio_den, width, height, par_n, par_d, display_par_n,
display_par_d);
if (ok) {
GST_LOG ("PAR: %u/%u DAR:%u/%u", par_n, par_d, display_par_n,
display_par_d);
return TRUE;
}
return FALSE;
}
static void
_apply_par (GtkGstBaseWidget * widget)
{
guint display_ratio_num, display_ratio_den;
gint width, height;
width = GST_VIDEO_INFO_WIDTH (&widget->v_info);
height = GST_VIDEO_INFO_HEIGHT (&widget->v_info);
display_ratio_num = widget->display_ratio_num;
display_ratio_den = widget->display_ratio_den;
if (height % display_ratio_den == 0) {
GST_DEBUG ("keeping video height");
widget->display_width = (guint)
gst_util_uint64_scale_int (height, display_ratio_num,
display_ratio_den);
widget->display_height = height;
} else if (width % display_ratio_num == 0) {
GST_DEBUG ("keeping video width");
widget->display_width = width;
widget->display_height = (guint)
gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num);
} else {
GST_DEBUG ("approximating while keeping video height");
widget->display_width = (guint)
gst_util_uint64_scale_int (height, display_ratio_num,
display_ratio_den);
widget->display_height = height;
}
GST_DEBUG ("scaling to %dx%d", widget->display_width, widget->display_height);
}
static gboolean
_queue_draw (GtkGstBaseWidget * widget)
{
GTK_GST_BASE_WIDGET_LOCK (widget);
widget->draw_id = 0;
if (widget->pending_resize) {
widget->pending_resize = FALSE;
widget->v_info = widget->pending_v_info;
widget->negotiated = TRUE;
_apply_par (widget);
gtk_widget_queue_resize (GTK_WIDGET (widget));
} else {
gtk_widget_queue_draw (GTK_WIDGET (widget));
}
GTK_GST_BASE_WIDGET_UNLOCK (widget);
return G_SOURCE_REMOVE;
}
static const gchar *
_gdk_key_to_navigation_string (guint keyval)
{
/* TODO: expand */
switch (keyval) {
#define KEY(key) case GDK_KEY_ ## key: return G_STRINGIFY(key)
KEY (Up);
KEY (Down);
KEY (Left);
KEY (Right);
KEY (Home);
KEY (End);
#undef KEY
default:
return NULL;
}
}
static gboolean
gtk_gst_base_widget_key_event (GtkWidget * widget, GdkEventKey * event)
{
GtkGstBaseWidget *base_widget = GTK_GST_BASE_WIDGET (widget);
GstElement *element;
if ((element = g_weak_ref_get (&base_widget->element))) {
if (GST_IS_NAVIGATION (element)) {
const gchar *str = _gdk_key_to_navigation_string (event->keyval);
const gchar *key_type =
event->type == GDK_KEY_PRESS ? "key-press" : "key-release";
if (!str)
str = event->string;
gst_navigation_send_key_event (GST_NAVIGATION (element), key_type, str);
}
g_object_unref (element);
}
return FALSE;
}
static void
_fit_stream_to_allocated_size (GtkGstBaseWidget * base_widget,
GtkAllocation * allocation, GstVideoRectangle * result)
{
if (base_widget->force_aspect_ratio) {
GstVideoRectangle src, dst;
src.x = 0;
src.y = 0;
src.w = base_widget->display_width;
src.h = base_widget->display_height;
dst.x = 0;
dst.y = 0;
dst.w = allocation->width;
dst.h = allocation->height;
gst_video_sink_center_rect (src, dst, result, TRUE);
} else {
result->x = 0;
result->y = 0;
result->w = allocation->width;
result->h = allocation->height;
}
}
static void
_display_size_to_stream_size (GtkGstBaseWidget * base_widget, gdouble x,
gdouble y, gdouble * stream_x, gdouble * stream_y)
{
gdouble stream_width, stream_height;
GtkAllocation allocation;
GstVideoRectangle result;
gtk_widget_get_allocation (GTK_WIDGET (base_widget), &allocation);
_fit_stream_to_allocated_size (base_widget, &allocation, &result);
stream_width = (gdouble) GST_VIDEO_INFO_WIDTH (&base_widget->v_info);
stream_height = (gdouble) GST_VIDEO_INFO_HEIGHT (&base_widget->v_info);
/* from display coordinates to stream coordinates */
if (result.w > 0)
*stream_x = (x - result.x) / result.w * stream_width;
else
*stream_x = 0.;
/* clip to stream size */
if (*stream_x < 0.)
*stream_x = 0.;
if (*stream_x > GST_VIDEO_INFO_WIDTH (&base_widget->v_info))
*stream_x = GST_VIDEO_INFO_WIDTH (&base_widget->v_info);
/* same for y-axis */
if (result.h > 0)
*stream_y = (y - result.y) / result.h * stream_height;
else
*stream_y = 0.;
if (*stream_y < 0.)
*stream_y = 0.;
if (*stream_y > GST_VIDEO_INFO_HEIGHT (&base_widget->v_info))
*stream_y = GST_VIDEO_INFO_HEIGHT (&base_widget->v_info);
GST_TRACE ("transform %fx%f into %fx%f", x, y, *stream_x, *stream_y);
}
static gboolean
gtk_gst_base_widget_button_event (GtkWidget * widget, GdkEventButton * event)
{
GtkGstBaseWidget *base_widget = GTK_GST_BASE_WIDGET (widget);
GstElement *element;
if ((element = g_weak_ref_get (&base_widget->element))) {
if (GST_IS_NAVIGATION (element)) {
const gchar *key_type =
event->type ==
GDK_BUTTON_PRESS ? "mouse-button-press" : "mouse-button-release";
gdouble x, y;
_display_size_to_stream_size (base_widget, event->x, event->y, &x, &y);
gst_navigation_send_mouse_event (GST_NAVIGATION (element), key_type,
event->button, x, y);
}
g_object_unref (element);
}
return FALSE;
}
static gboolean
gtk_gst_base_widget_motion_event (GtkWidget * widget, GdkEventMotion * event)
{
GtkGstBaseWidget *base_widget = GTK_GST_BASE_WIDGET (widget);
GstElement *element;
if ((element = g_weak_ref_get (&base_widget->element))) {
if (GST_IS_NAVIGATION (element)) {
gdouble x, y;
_display_size_to_stream_size (base_widget, event->x, event->y, &x, &y);
gst_navigation_send_mouse_event (GST_NAVIGATION (element), "mouse-move",
0, x, y);
}
g_object_unref (element);
}
return FALSE;
}
void
gtk_gst_base_widget_class_init (GtkGstBaseWidgetClass * klass)
{
GObjectClass *gobject_klass = (GObjectClass *) klass;
GtkWidgetClass *widget_klass = (GtkWidgetClass *) klass;
gobject_klass->set_property = gtk_gst_base_widget_set_property;
gobject_klass->get_property = gtk_gst_base_widget_get_property;
g_object_class_install_property (gobject_klass, PROP_FORCE_ASPECT_RATIO,
g_param_spec_boolean ("force-aspect-ratio",
"Force aspect ratio",
"When enabled, scaling will respect original aspect ratio",
DEFAULT_FORCE_ASPECT_RATIO,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, PROP_PIXEL_ASPECT_RATIO,
gst_param_spec_fraction ("pixel-aspect-ratio", "Pixel Aspect Ratio",
"The pixel aspect ratio of the device", DEFAULT_PAR_N, DEFAULT_PAR_D,
G_MAXINT, 1, 1, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, PROP_IGNORE_ALPHA,
g_param_spec_boolean ("ignore-alpha", "Ignore Alpha",
"When enabled, alpha will be ignored and converted to black",
DEFAULT_IGNORE_ALPHA, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
widget_klass->get_preferred_width = gtk_gst_base_widget_get_preferred_width;
widget_klass->get_preferred_height = gtk_gst_base_widget_get_preferred_height;
widget_klass->key_press_event = gtk_gst_base_widget_key_event;
widget_klass->key_release_event = gtk_gst_base_widget_key_event;
widget_klass->button_press_event = gtk_gst_base_widget_button_event;
widget_klass->button_release_event = gtk_gst_base_widget_button_event;
widget_klass->motion_notify_event = gtk_gst_base_widget_motion_event;
}
void
gtk_gst_base_widget_init (GtkGstBaseWidget * widget)
{
int event_mask;
widget->force_aspect_ratio = DEFAULT_FORCE_ASPECT_RATIO;
widget->par_n = DEFAULT_PAR_N;
widget->par_d = DEFAULT_PAR_D;
widget->ignore_alpha = DEFAULT_IGNORE_ALPHA;
gst_video_info_init (&widget->v_info);
gst_video_info_init (&widget->pending_v_info);
g_weak_ref_init (&widget->element, NULL);
g_mutex_init (&widget->lock);
gtk_widget_set_can_focus (GTK_WIDGET (widget), TRUE);
event_mask = gtk_widget_get_events (GTK_WIDGET (widget));
event_mask |= GDK_KEY_PRESS_MASK
| GDK_KEY_RELEASE_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK
| GDK_POINTER_MOTION_MASK | GDK_BUTTON_MOTION_MASK;
gtk_widget_set_events (GTK_WIDGET (widget), event_mask);
}
void
gtk_gst_base_widget_finalize (GObject * object)
{
GtkGstBaseWidget *widget = GTK_GST_BASE_WIDGET (object);
gst_buffer_replace (&widget->pending_buffer, NULL);
gst_buffer_replace (&widget->buffer, NULL);
g_mutex_clear (&widget->lock);
g_weak_ref_clear (&widget->element);
if (widget->draw_id)
g_source_remove (widget->draw_id);
}
void
gtk_gst_base_widget_set_element (GtkGstBaseWidget * widget,
GstElement * element)
{
g_weak_ref_set (&widget->element, element);
}
gboolean
gtk_gst_base_widget_set_format (GtkGstBaseWidget * widget,
GstVideoInfo * v_info)
{
GTK_GST_BASE_WIDGET_LOCK (widget);
if (gst_video_info_is_equal (&widget->pending_v_info, v_info)) {
GTK_GST_BASE_WIDGET_UNLOCK (widget);
return TRUE;
}
if (!_calculate_par (widget, v_info)) {
GTK_GST_BASE_WIDGET_UNLOCK (widget);
return FALSE;
}
widget->pending_resize = TRUE;
widget->pending_v_info = *v_info;
GTK_GST_BASE_WIDGET_UNLOCK (widget);
return TRUE;
}
void
gtk_gst_base_widget_set_buffer (GtkGstBaseWidget * widget, GstBuffer * buffer)
{
/* As we have no type, this is better then no check */
g_return_if_fail (GTK_IS_WIDGET (widget));
GTK_GST_BASE_WIDGET_LOCK (widget);
gst_buffer_replace (&widget->pending_buffer, buffer);
if (!widget->draw_id) {
widget->draw_id = g_idle_add_full (G_PRIORITY_DEFAULT,
(GSourceFunc) _queue_draw, widget, NULL);
}
GTK_GST_BASE_WIDGET_UNLOCK (widget);
}