gstreamer/gst-libs/gst/player/gstplayer-video-overlay-video-renderer.c
2016-04-15 13:39:32 -07:00

309 lines
9.7 KiB
C

/* GStreamer
*
* Copyright (C) 2014-2015 Sebastian Dröge <sebastian@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.
*/
/**
* SECTION:gstplayer-videooverlayvideorenderer
* @short_description: Player Video Overlay Video Renderer
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstplayer-video-overlay-video-renderer.h"
#include "gstplayer.h"
#include <gst/video/video.h>
struct _GstPlayerVideoOverlayVideoRenderer
{
GObject parent;
GstVideoOverlay *video_overlay;
gpointer window_handle;
gint x, y, width, height;
};
struct _GstPlayerVideoOverlayVideoRendererClass
{
GObjectClass parent_class;
};
static void
gst_player_video_overlay_video_renderer_interface_init
(GstPlayerVideoRendererInterface * iface);
enum
{
VIDEO_OVERLAY_VIDEO_RENDERER_PROP_0,
VIDEO_OVERLAY_VIDEO_RENDERER_PROP_WINDOW_HANDLE,
VIDEO_OVERLAY_VIDEO_RENDERER_PROP_LAST
};
G_DEFINE_TYPE_WITH_CODE (GstPlayerVideoOverlayVideoRenderer,
gst_player_video_overlay_video_renderer, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (GST_TYPE_PLAYER_VIDEO_RENDERER,
gst_player_video_overlay_video_renderer_interface_init));
static GParamSpec
* video_overlay_video_renderer_param_specs
[VIDEO_OVERLAY_VIDEO_RENDERER_PROP_LAST] = { NULL, };
static void
gst_player_video_overlay_video_renderer_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstPlayerVideoOverlayVideoRenderer *self =
GST_PLAYER_VIDEO_OVERLAY_VIDEO_RENDERER (object);
switch (prop_id) {
case VIDEO_OVERLAY_VIDEO_RENDERER_PROP_WINDOW_HANDLE:
self->window_handle = g_value_get_pointer (value);
if (self->video_overlay)
gst_video_overlay_set_window_handle (self->video_overlay,
(guintptr) self->window_handle);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_player_video_overlay_video_renderer_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstPlayerVideoOverlayVideoRenderer *self =
GST_PLAYER_VIDEO_OVERLAY_VIDEO_RENDERER (object);
switch (prop_id) {
case VIDEO_OVERLAY_VIDEO_RENDERER_PROP_WINDOW_HANDLE:
g_value_set_pointer (value, self->window_handle);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_player_video_overlay_video_renderer_finalize (GObject * object)
{
GstPlayerVideoOverlayVideoRenderer *self =
GST_PLAYER_VIDEO_OVERLAY_VIDEO_RENDERER (object);
if (self->video_overlay)
gst_object_unref (self->video_overlay);
G_OBJECT_CLASS
(gst_player_video_overlay_video_renderer_parent_class)->finalize (object);
}
static void
gst_player_video_overlay_video_renderer_class_init
(GstPlayerVideoOverlayVideoRendererClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property =
gst_player_video_overlay_video_renderer_set_property;
gobject_class->get_property =
gst_player_video_overlay_video_renderer_get_property;
gobject_class->finalize = gst_player_video_overlay_video_renderer_finalize;
video_overlay_video_renderer_param_specs
[VIDEO_OVERLAY_VIDEO_RENDERER_PROP_WINDOW_HANDLE] =
g_param_spec_pointer ("window-handle", "Window Handle",
"Window handle to embed the video into",
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (gobject_class,
VIDEO_OVERLAY_VIDEO_RENDERER_PROP_LAST,
video_overlay_video_renderer_param_specs);
}
static void
gst_player_video_overlay_video_renderer_init
(GstPlayerVideoOverlayVideoRenderer * self)
{
self->x = self->y = self->width = self->height = -1;
}
static GstElement *gst_player_video_overlay_video_renderer_create_video_sink
(GstPlayerVideoRenderer * iface, GstPlayer * player)
{
GstElement *video_overlay;
GstPlayerVideoOverlayVideoRenderer *self =
GST_PLAYER_VIDEO_OVERLAY_VIDEO_RENDERER (iface);
if (self->video_overlay)
gst_object_unref (self->video_overlay);
video_overlay = gst_player_get_pipeline (player);
g_return_val_if_fail (GST_IS_VIDEO_OVERLAY (video_overlay), NULL);
self->video_overlay = GST_VIDEO_OVERLAY (video_overlay);
gst_video_overlay_set_window_handle (self->video_overlay,
(guintptr) self->window_handle);
if (self->width != -1 || self->height != -1)
gst_video_overlay_set_render_rectangle (self->video_overlay, self->x,
self->y, self->width, self->height);
return NULL;
}
static void
gst_player_video_overlay_video_renderer_interface_init
(GstPlayerVideoRendererInterface * iface)
{
iface->create_video_sink =
gst_player_video_overlay_video_renderer_create_video_sink;
}
/**
* gst_player_video_overlay_video_renderer_new:
* @window_handle: (allow-none): Window handle to use or %NULL
*
* Returns: (transfer full):
*/
GstPlayerVideoRenderer *
gst_player_video_overlay_video_renderer_new (gpointer window_handle)
{
return g_object_new (GST_TYPE_PLAYER_VIDEO_OVERLAY_VIDEO_RENDERER,
"window-handle", window_handle, NULL);
}
/**
* gst_player_video_overlay_video_renderer_set_window_handle:
* @self: #GstPlayerVideoRenderer instance
* @window_handle: handle referencing to the platform specific window
*
* Sets the platform specific window handle into which the video
* should be rendered
**/
void gst_player_video_overlay_video_renderer_set_window_handle
(GstPlayerVideoOverlayVideoRenderer * self, gpointer window_handle)
{
g_return_if_fail (GST_IS_PLAYER_VIDEO_OVERLAY_VIDEO_RENDERER (self));
g_object_set (self, "window-handle", window_handle, NULL);
}
/**
* gst_player_video_overlay_video_renderer_get_window_handle:
* @self: #GstPlayerVideoRenderer instance
*
* Returns: (transfer none): The currently set, platform specific window
* handle
*/
gpointer
gst_player_video_overlay_video_renderer_get_window_handle
(GstPlayerVideoOverlayVideoRenderer * self) {
gpointer window_handle;
g_return_val_if_fail (GST_IS_PLAYER_VIDEO_OVERLAY_VIDEO_RENDERER (self),
NULL);
g_object_get (self, "window-handle", &window_handle, NULL);
return window_handle;
}
/**
* gst_player_video_overlay_video_renderer_expose:
* @self: a #GstPlayerVideoOverlayVideoRenderer instance.
*
* Tell an overlay that it has been exposed. This will redraw the current frame
* in the drawable even if the pipeline is PAUSED.
*/
void gst_player_video_overlay_video_renderer_expose
(GstPlayerVideoOverlayVideoRenderer * self)
{
g_return_if_fail (GST_IS_PLAYER_VIDEO_OVERLAY_VIDEO_RENDERER (self));
if (self->video_overlay)
gst_video_overlay_expose (self->video_overlay);
}
/**
* gst_player_video_overlay_video_renderer_set_render_rectangle:
* @self: a #GstPlayerVideoOverlayVideoRenderer instance
* @x: the horizontal offset of the render area inside the window
* @y: the vertical offset of the render area inside the window
* @width: the width of the render area inside the window
* @height: the height of the render area inside the window
*
* Configure a subregion as a video target within the window set by
* gst_player_video_overlay_video_renderer_set_window_handle(). If this is not
* used or not supported the video will fill the area of the window set as the
* overlay to 100%. By specifying the rectangle, the video can be overlaid to
* a specific region of that window only. After setting the new rectangle one
* should call gst_player_video_overlay_video_renderer_expose() to force a
* redraw. To unset the region pass -1 for the @width and @height parameters.
*
* This method is needed for non fullscreen video overlay in UI toolkits that
* do not support subwindows.
*
*/
void gst_player_video_overlay_video_renderer_set_render_rectangle
(GstPlayerVideoOverlayVideoRenderer * self, gint x, gint y, gint width,
gint height)
{
g_return_if_fail (GST_IS_PLAYER_VIDEO_OVERLAY_VIDEO_RENDERER (self));
self->x = x;
self->y = y;
self->width = width;
self->height = height;
if (self->video_overlay)
gst_video_overlay_set_render_rectangle (self->video_overlay,
x, y, width, height);
}
/**
* gst_player_video_overlay_video_renderer_get_render_rectangle:
* @self: a #GstPlayerVideoOverlayVideoRenderer instance
* @x: (out) (allow-none): the horizontal offset of the render area inside the window
* @y: (out) (allow-none): the vertical offset of the render area inside the window
* @width: (out) (allow-none): the width of the render area inside the window
* @height: (out) (allow-none): the height of the render area inside the window
*
* Return the currently configured render rectangle. See gst_player_video_overlay_video_renderer_set_render_rectangle()
* for details.
*
*/
void gst_player_video_overlay_video_renderer_get_render_rectangle
(GstPlayerVideoOverlayVideoRenderer * self, gint * x, gint * y,
gint * width, gint * height)
{
g_return_if_fail (GST_IS_PLAYER_VIDEO_OVERLAY_VIDEO_RENDERER (self));
if (x)
*x = self->x;
if (y)
*y = self->y;
if (width)
*width = self->width;
if (height)
*height = self->height;
}