gstreamer/gst-libs/gst/gl/dispmanx/gstglwindow_dispmanx_egl.c
Philippe Normand 14ac40f106 gl/dispmanx: surfaceless EGL context support
Show the DispmanX window only if there's no shared external GL context
set up. When a window is required by the context a transparent
DispmanX element is created and later on made visible by the ::show
method.

https://bugzilla.gnome.org/show_bug.cgi?id=746632
2015-03-24 11:12:05 +00:00

384 lines
11 KiB
C

/*
* GStreamer
* Copyright (C) 2013 Julien Isorce <julien.isorce@collabora.co.uk>
*
* 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.
*/
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "../gstgl_fwd.h"
#include <gst/gl/gstglcontext.h>
#include "gstglwindow_dispmanx_egl.h"
#ifndef ELEMENT_CHANGE_LAYER
/* copied from interface/vmcs_host/vc_vchi_dispmanx.h of userland.git */
#define ELEMENT_CHANGE_LAYER (1<<0)
#define ELEMENT_CHANGE_OPACITY (1<<1)
#define ELEMENT_CHANGE_DEST_RECT (1<<2)
#define ELEMENT_CHANGE_SRC_RECT (1<<3)
#define ELEMENT_CHANGE_MASK_RESOURCE (1<<4)
#define ELEMENT_CHANGE_TRANSFORM (1<<5)
#endif
#define GST_CAT_DEFAULT gst_gl_window_debug
#define gst_gl_window_dispmanx_egl_parent_class parent_class
G_DEFINE_TYPE (GstGLWindowDispmanxEGL, gst_gl_window_dispmanx_egl,
GST_GL_TYPE_WINDOW);
static void gst_gl_window_dispmanx_egl_finalize (GObject * object);
static guintptr gst_gl_window_dispmanx_egl_get_window_handle (GstGLWindow *
window);
static void gst_gl_window_dispmanx_egl_set_window_handle (GstGLWindow * window,
guintptr handle);
static void gst_gl_window_dispmanx_egl_set_preferred_size (GstGLWindow * window,
gint width, gint height);
static void gst_gl_window_dispmanx_egl_show (GstGLWindow * window);
static void gst_gl_window_dispmanx_egl_draw (GstGLWindow * window);
static void gst_gl_window_dispmanx_egl_run (GstGLWindow * window);
static void gst_gl_window_dispmanx_egl_quit (GstGLWindow * window);
static void gst_gl_window_dispmanx_egl_send_message_async (GstGLWindow * window,
GstGLWindowCB callback, gpointer data, GDestroyNotify destroy);
static void gst_gl_window_dispmanx_egl_close (GstGLWindow * window);
static gboolean gst_gl_window_dispmanx_egl_open (GstGLWindow * window,
GError ** error);
static guintptr gst_gl_window_dispmanx_egl_get_display (GstGLWindow * window);
static void window_resize (GstGLWindowDispmanxEGL * window_egl, guint width,
guint height, gboolean visible);
static void
gst_gl_window_dispmanx_egl_class_init (GstGLWindowDispmanxEGLClass * klass)
{
GstGLWindowClass *window_class = (GstGLWindowClass *) klass;
GObjectClass *gobject_class = (GObjectClass *) klass;
window_class->get_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_get_window_handle);
window_class->set_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_set_window_handle);
window_class->show = GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_show);
window_class->draw_unlocked =
GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_draw);
window_class->draw = GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_draw);
window_class->run = GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_run);
window_class->quit = GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_quit);
window_class->send_message_async =
GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_send_message_async);
window_class->close = GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_close);
window_class->open = GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_open);
window_class->get_display =
GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_get_display);
window_class->set_preferred_size =
GST_DEBUG_FUNCPTR (gst_gl_window_dispmanx_egl_set_preferred_size);
gobject_class->finalize = gst_gl_window_dispmanx_egl_finalize;
}
static void
gst_gl_window_dispmanx_egl_init (GstGLWindowDispmanxEGL * window_egl)
{
window_egl->main_context = g_main_context_new ();
window_egl->loop = g_main_loop_new (window_egl->main_context, FALSE);
}
static void
gst_gl_window_dispmanx_egl_finalize (GObject * object)
{
GstGLWindowDispmanxEGL *window_egl = GST_GL_WINDOW_DISPMANX_EGL (object);
g_main_loop_unref (window_egl->loop);
g_main_context_unref (window_egl->main_context);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/* Must be called in the gl thread */
GstGLWindowDispmanxEGL *
gst_gl_window_dispmanx_egl_new (void)
{
GstGLWindowDispmanxEGL *window;
GST_DEBUG ("creating Dispmanx EGL window");
window = g_object_new (GST_GL_TYPE_WINDOW_DISPMANX_EGL, NULL);
window->egldisplay = EGL_DEFAULT_DISPLAY;
window->visible = FALSE;
window->display = 0;
window->dp_width = 0;
window->dp_height = 0;
window->native.element = 0;
window->native.width = 0;
window->native.height = 0;
return window;
}
static void
gst_gl_window_dispmanx_egl_close (GstGLWindow * window)
{
GstGLWindowDispmanxEGL *window_egl;
DISPMANX_UPDATE_HANDLE_T dispman_update;
window_egl = GST_GL_WINDOW_DISPMANX_EGL (window);
if (window_egl->native.element) {
dispman_update = vc_dispmanx_update_start (0);
vc_dispmanx_element_remove (dispman_update, window_egl->native.element);
vc_dispmanx_update_submit_sync (dispman_update);
}
vc_dispmanx_display_close (window_egl->display);
g_main_loop_unref (window_egl->loop);
window_egl->loop = NULL;
g_main_context_unref (window_egl->main_context);
window_egl->main_context = NULL;
}
static gboolean
gst_gl_window_dispmanx_egl_open (GstGLWindow * window, GError ** error)
{
GstGLWindowDispmanxEGL *window_egl = GST_GL_WINDOW_DISPMANX_EGL (window);
gint ret = graphics_get_display_size (0, &window_egl->dp_width,
&window_egl->dp_height);
if (ret < 0) {
GST_ERROR ("Can't open display");
return FALSE;
}
GST_DEBUG ("Got display size: %dx%d\n", window_egl->dp_width,
window_egl->dp_height);
window_egl->native.element = 0;
return TRUE;
}
gboolean
gst_gl_window_dispmanx_egl_create_window (GstGLWindowDispmanxEGL * window_egl)
{
window_egl->native.width = 0;
window_egl->native.height = 0;
window_egl->display = vc_dispmanx_display_open (0);
window_resize (window_egl, 16, 16, FALSE);
return TRUE;
}
static void
gst_gl_window_dispmanx_egl_run (GstGLWindow * window)
{
GstGLWindowDispmanxEGL *window_egl;
window_egl = GST_GL_WINDOW_DISPMANX_EGL (window);
GST_LOG ("starting main loop");
g_main_loop_run (window_egl->loop);
GST_LOG ("exiting main loop");
}
static void
gst_gl_window_dispmanx_egl_quit (GstGLWindow * window)
{
GstGLWindowDispmanxEGL *window_egl;
window_egl = GST_GL_WINDOW_DISPMANX_EGL (window);
GST_LOG ("sending quit");
g_main_loop_quit (window_egl->loop);
GST_LOG ("quit sent");
}
typedef struct _GstGLMessage
{
GstGLWindowCB callback;
gpointer data;
GDestroyNotify destroy;
} GstGLMessage;
static gboolean
_run_message (GstGLMessage * message)
{
if (message->callback)
message->callback (message->data);
if (message->destroy)
message->destroy (message->data);
g_slice_free (GstGLMessage, message);
return FALSE;
}
static void
gst_gl_window_dispmanx_egl_send_message_async (GstGLWindow * window,
GstGLWindowCB callback, gpointer data, GDestroyNotify destroy)
{
GstGLWindowDispmanxEGL *window_egl;
GstGLMessage *message;
window_egl = GST_GL_WINDOW_DISPMANX_EGL (window);
message = g_slice_new (GstGLMessage);
message->callback = callback;
message->data = data;
message->destroy = destroy;
g_main_context_invoke (window_egl->main_context, (GSourceFunc) _run_message,
message);
}
static guintptr
gst_gl_window_dispmanx_egl_get_window_handle (GstGLWindow * window)
{
GstGLWindowDispmanxEGL *window_egl;
window_egl = GST_GL_WINDOW_DISPMANX_EGL (window);
if (window_egl->native.element)
return (guintptr) & window_egl->native;
return 0;
}
static void
gst_gl_window_dispmanx_egl_set_window_handle (GstGLWindow * window,
guintptr handle)
{
}
static void
gst_gl_window_dispmanx_egl_set_preferred_size (GstGLWindow * window, gint width,
gint height)
{
GstGLWindowDispmanxEGL *window_egl = GST_GL_WINDOW_DISPMANX_EGL (window);
GST_DEBUG_OBJECT (window, "set preferred size to %dx%d", width, height);
window_egl->preferred_width = width;
window_egl->preferred_height = height;
}
static void
window_resize (GstGLWindowDispmanxEGL * window_egl, guint width, guint height,
gboolean visible)
{
GST_DEBUG ("resizing %s window from %ux%u to %ux%u",
visible ? "visible" : "invisible", window_egl->native.width,
window_egl->native.height, width, height);
if (window_egl->display) {
VC_RECT_T dst_rect;
VC_RECT_T src_rect;
GstVideoRectangle src, dst, res;
DISPMANX_UPDATE_HANDLE_T dispman_update;
uint32_t opacity = visible ? 255 : 0;
VC_DISPMANX_ALPHA_T alpha =
{ DISPMANX_FLAGS_ALPHA_FIXED_ALL_PIXELS, opacity, 0 };
/* Center width*height frame inside dp_width*dp_height */
src.w = width;
src.h = height;
src.x = src.y = 0;
dst.w = window_egl->dp_width;
dst.h = window_egl->dp_height;
dst.x = dst.y = 0;
gst_video_sink_center_rect (src, dst, &res, FALSE);
dst_rect.x = res.x;
dst_rect.y = res.y;
dst_rect.width = res.w;
dst_rect.height = res.h;
src_rect.x = 0;
src_rect.y = 0;
src_rect.width = width << 16;
src_rect.height = height << 16;
dispman_update = vc_dispmanx_update_start (0);
if (window_egl->native.element) {
uint32_t change_flags =
ELEMENT_CHANGE_OPACITY | ELEMENT_CHANGE_DEST_RECT |
ELEMENT_CHANGE_SRC_RECT;
vc_dispmanx_element_change_attributes (dispman_update,
window_egl->native.element, change_flags, 0, opacity, &dst_rect,
&src_rect, 0, 0);
} else {
window_egl->native.element = vc_dispmanx_element_add (dispman_update,
window_egl->display, 0, &dst_rect, 0, &src_rect,
DISPMANX_PROTECTION_NONE, &alpha, 0, 0);
}
vc_dispmanx_update_submit_sync (dispman_update);
if (GST_GL_WINDOW (window_egl)->resize)
GST_GL_WINDOW (window_egl)->
resize (GST_GL_WINDOW (window_egl)->resize_data, width, height);
}
window_egl->native.width = width;
window_egl->native.height = height;
}
static void
gst_gl_window_dispmanx_egl_show (GstGLWindow * window)
{
GstGLWindowDispmanxEGL *window_egl = GST_GL_WINDOW_DISPMANX_EGL (window);
if (!window_egl->visible) {
window_resize (window_egl, window_egl->preferred_width, window_egl->preferred_height, TRUE);
window_egl->visible = TRUE;
}
}
static void
draw_cb (gpointer data)
{
GstGLWindowDispmanxEGL *window_egl = data;
GstGLWindow *window = GST_GL_WINDOW (window_egl);
GstGLContext *context = gst_gl_window_get_context (window);
GstGLContextClass *context_class = GST_GL_CONTEXT_GET_CLASS (context);
if (window->draw)
window->draw (window->draw_data);
context_class->swap_buffers (context);
gst_object_unref (context);
}
static void
gst_gl_window_dispmanx_egl_draw (GstGLWindow * window)
{
gst_gl_window_send_message (window, (GstGLWindowCB) draw_cb, window);
}
static guintptr
gst_gl_window_dispmanx_egl_get_display (GstGLWindow * window)
{
GstGLWindowDispmanxEGL *window_egl;
window_egl = GST_GL_WINDOW_DISPMANX_EGL (window);
return (guintptr) window_egl->egldisplay;
}