diff options
| -rw-r--r-- | ext/gtk/Makefile.am | 2 | ||||
| -rw-r--r-- | ext/gtk/gtkgstbasewidget.c | 318 | ||||
| -rw-r--r-- | ext/gtk/gtkgstbasewidget.h | 94 |
3 files changed, 414 insertions, 0 deletions
diff --git a/ext/gtk/Makefile.am b/ext/gtk/Makefile.am index 45d0be0d2..58b4e3f96 100644 --- a/ext/gtk/Makefile.am +++ b/ext/gtk/Makefile.am @@ -8,6 +8,8 @@ lib_LTLIBRARIES = # source sources = \ + gtkgstbasewidget.c \ + gtkgstbasewidget.h \ gtkgstwidget.c \ gtkgstwidget.h \ gstgtksink.c \ diff --git a/ext/gtk/gtkgstbasewidget.c b/ext/gtk/gtkgstbasewidget.c new file mode 100644 index 000000000..972541ff7 --- /dev/null +++ b/ext/gtk/gtkgstbasewidget.c @@ -0,0 +1,318 @@ +/* + * 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 +_queue_resize (GtkGstBaseWidget * widget) +{ + GTK_GST_BASE_WIDGET_LOCK (widget); + widget->resize_id = 0; + + GTK_GST_BASE_WIDGET_UNLOCK (widget); + + gtk_widget_queue_resize (GTK_WIDGET (widget)); + + return G_SOURCE_REMOVE; +} + +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; + guint display_ratio_num, display_ratio_den; + + 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 (&display_ratio_num, + &display_ratio_den, width, height, par_n, par_d, display_par_n, + display_par_d); + + if (!ok) + return FALSE; + + GST_LOG ("PAR: %u/%u DAR:%u/%u", par_n, par_d, display_par_n, display_par_d); + + 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); + + return TRUE; +} + +static gboolean +_queue_draw (GtkGstBaseWidget * widget) +{ + GTK_GST_BASE_WIDGET_LOCK (widget); + widget->draw_id = 0; + GTK_GST_BASE_WIDGET_UNLOCK (widget); + + gtk_widget_queue_draw (GTK_WIDGET (widget)); + + return G_SOURCE_REMOVE; +} + +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; +} + +void +gtk_gst_base_widget_init (GtkGstBaseWidget * widget) +{ + 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; + + g_mutex_init (&widget->lock); +} + +void +gtk_gst_base_widget_finalize (GObject * object) +{ + GtkGstBaseWidget *widget = GTK_GST_BASE_WIDGET (object); + + gst_buffer_replace (&widget->buffer, NULL); + g_mutex_clear (&widget->lock); + + if (widget->draw_id) + g_source_remove (widget->draw_id); + + if (widget->resize_id) + g_source_remove (widget->resize_id); +} + +gboolean +gtk_gst_base_widget_set_caps (GtkGstBaseWidget * widget, GstCaps * caps) +{ + GstVideoInfo v_info; + + if (widget->caps && gst_caps_is_equal_fixed (widget->caps, caps)) + return TRUE; + + if (!gst_video_info_from_caps (&v_info, caps)) + return FALSE; + + GTK_GST_BASE_WIDGET_LOCK (widget); + + /* FIXME this will cause black frame to be displayed, move this in the + * _queue_resize callback passing over the video info */ + + if (!_calculate_par (widget, &v_info)) { + GTK_GST_BASE_WIDGET_UNLOCK (widget); + return FALSE; + } + + if (widget->reset) + widget->reset (widget); + + gst_buffer_replace (&widget->buffer, NULL); + gst_caps_replace (&widget->caps, caps); + widget->v_info = v_info; + widget->negotiated = TRUE; + widget->new_buffer = TRUE; + + if (!widget->resize_id) { + widget->resize_id = g_idle_add_full (G_PRIORITY_DEFAULT, + (GSourceFunc) _queue_resize, widget, NULL); + } + + 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)); + g_return_if_fail (buffer == NULL || widget->negotiated); + + GTK_GST_BASE_WIDGET_LOCK (widget); + + gst_buffer_replace (&widget->buffer, buffer); + widget->new_buffer = TRUE; + + 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); +} diff --git a/ext/gtk/gtkgstbasewidget.h b/ext/gtk/gtkgstbasewidget.h new file mode 100644 index 000000000..e4242f192 --- /dev/null +++ b/ext/gtk/gtkgstbasewidget.h @@ -0,0 +1,94 @@ +/* + * 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. + */ + +#ifndef __GTK_GST_BASE_WIDGET_H__ +#define __GTK_GST_BASE_WIDGET_H__ + +#include <gtk/gtk.h> +#include <gst/gst.h> +#include <gst/video/video.h> + +#define GTK_GST_BASE_WIDGET(w) ((GtkGstBaseWidget *)(w)) +#define GTK_GST_BASE_WIDGET_CLASS(k) ((GtkGstBaseWidgetClass *)(k)) +#define GTK_GST_BASE_WIDGET_LOCK(w) g_mutex_lock(&((GtkGstBaseWidget*)(w))->lock) +#define GTK_GST_BASE_WIDGET_UNLOCK(w) g_mutex_unlock(&((GtkGstBaseWidget*)(w))->lock) + +G_BEGIN_DECLS + +typedef struct _GtkGstBaseWidget GtkGstBaseWidget; +typedef struct _GtkGstBaseWidgetClass GtkGstBaseWidgetClass; + +struct _GtkGstBaseWidget +{ + union { + GtkDrawingArea drawing_area; +#if GTK_CHECK_VERSION(3, 15, 0) + GtkGLArea gl_area; +#endif + } parent; + + /* properties */ + gboolean force_aspect_ratio; + gint par_n, par_d; + gboolean ignore_alpha; + + gint display_width; + gint display_height; + + gboolean negotiated; + GstBuffer *buffer; + GstVideoInfo v_info; + gboolean new_buffer; + + /* Poor-man virtual */ + void (*reset) (GtkGstBaseWidget * widget); + + /*< private >*/ + GMutex lock; + GstCaps *caps; + + /* Pending queued idles callback */ + guint draw_id; + guint resize_id; +}; + +struct _GtkGstBaseWidgetClass +{ + union { + GtkDrawingAreaClass drawing_area_class; +#if GTK_CHECK_VERSION(3, 15, 0) + GtkGLAreaClass gl_area_class; +#endif + } parent_class; +}; + +/* For implementer */ +void gtk_gst_base_widget_class_init (GtkGstBaseWidgetClass * klass); +void gtk_gst_base_widget_init (GtkGstBaseWidget * widget); + +void gtk_gst_base_widget_finalize (GObject * object); + +/* API */ +gboolean gtk_gst_base_widget_set_caps (GtkGstBaseWidget * widget, GstCaps *caps); +void gtk_gst_base_widget_set_buffer (GtkGstBaseWidget * widget, GstBuffer *buffer); + +G_END_DECLS + +#endif /* __GTK_GST_BASE_WIDGET_H__ */ |