gstreamer/gst-libs/gst/vaapi/gstvaapidisplay_x11.c
2013-05-27 17:20:35 +02:00

480 lines
14 KiB
C

/*
* gstvaapidisplay_x11.c - VA/X11 display abstraction
*
* Copyright (C) 2010-2011 Splitted-Desktop Systems
* Copyright (C) 2011-2012 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
/**
* SECTION:gstvaapidisplay_x11
* @short_description: VA/X11 display abstraction
*/
#include "sysdeps.h"
#include <string.h>
#include "gstvaapiutils.h"
#include "gstvaapidisplay_priv.h"
#include "gstvaapidisplay_x11.h"
#include "gstvaapidisplay_x11_priv.h"
#ifdef HAVE_XRANDR
# include <X11/extensions/Xrandr.h>
#endif
#define DEBUG 1
#include "gstvaapidebug.h"
static const guint g_display_types =
(1U << GST_VAAPI_DISPLAY_TYPE_X11) |
(1U << GST_VAAPI_DISPLAY_TYPE_GLX);
static inline const gchar *
get_default_display_name(void)
{
static const gchar *g_display_name;
if (!g_display_name)
g_display_name = getenv("DISPLAY");
return g_display_name;
}
static gint
compare_display_name(gconstpointer a, gconstpointer b)
{
const GstVaapiDisplayInfo * const info = a;
const gchar *cached_name = info->display_name, *cached_name_end;
const gchar *tested_name = b, *tested_name_end;
guint cached_name_length, tested_name_length;
g_return_val_if_fail(cached_name, FALSE);
g_return_val_if_fail(tested_name, FALSE);
cached_name_end = strchr(cached_name, ':');
if (cached_name_end)
cached_name_length = cached_name_end - cached_name;
else
cached_name_length = strlen(cached_name);
tested_name_end = strchr(tested_name, ':');
if (tested_name_end)
tested_name_length = tested_name_end - tested_name;
else
tested_name_length = strlen(tested_name);
if (cached_name_length != tested_name_length)
return FALSE;
if (strncmp(cached_name, tested_name, cached_name_length) != 0)
return FALSE;
/* XXX: handle screen number? */
return TRUE;
}
/* Reconstruct a display name without our prefix */
static const gchar *
get_display_name(GstVaapiDisplayX11 *display)
{
GstVaapiDisplayX11Private * const priv = &display->priv;
const gchar *display_name = priv->display_name;
if (!display_name || *display_name == '\0')
return NULL;
return display_name;
}
/* Mangle display name with our prefix */
static gboolean
set_display_name(GstVaapiDisplayX11 *display, const gchar *display_name)
{
GstVaapiDisplayX11Private * const priv = &display->priv;
g_free(priv->display_name);
if (!display_name) {
display_name = get_default_display_name();
if (!display_name)
display_name = "";
}
priv->display_name = g_strdup(display_name);
return priv->display_name != NULL;
}
/* Set synchronous behavious on the underlying X11 display */
static void
set_synchronous(GstVaapiDisplayX11 *display, gboolean synchronous)
{
GstVaapiDisplayX11Private * const priv = &display->priv;
if (priv->synchronous != synchronous) {
priv->synchronous = synchronous;
if (priv->x11_display) {
GST_VAAPI_DISPLAY_LOCK(display);
XSynchronize(priv->x11_display, synchronous);
GST_VAAPI_DISPLAY_UNLOCK(display);
}
}
}
/* Check whether XRANDR extension is available */
static void
check_xrandr(GstVaapiDisplayX11 *display)
{
#ifdef HAVE_XRANDR
GstVaapiDisplayX11Private * const priv =
GST_VAAPI_DISPLAY_X11_PRIVATE(display);
int evt_base, err_base;
priv->use_xrandr = XRRQueryExtension(priv->x11_display,
&evt_base, &err_base);
#endif
}
static gboolean
gst_vaapi_display_x11_bind_display(GstVaapiDisplay *base_display,
gpointer native_display)
{
GstVaapiDisplayX11 * const display =
GST_VAAPI_DISPLAY_X11_CAST(base_display);
GstVaapiDisplayX11Private * const priv = &display->priv;
priv->x11_display = native_display;
priv->x11_screen = DefaultScreen(native_display);
priv->use_foreign_display = TRUE;
check_xrandr(display);
if (!set_display_name(display, XDisplayString(priv->x11_display)))
return FALSE;
return TRUE;
}
static gboolean
gst_vaapi_display_x11_open_display(GstVaapiDisplay *base_display,
const gchar *name)
{
GstVaapiDisplayX11 * const display =
GST_VAAPI_DISPLAY_X11_CAST(base_display);
GstVaapiDisplayX11Private * const priv = &display->priv;
GstVaapiDisplayCache *cache;
const GstVaapiDisplayInfo *info;
cache = gst_vaapi_display_get_cache();
g_return_val_if_fail(cache != NULL, FALSE);
if (!set_display_name(display, name))
return FALSE;
info = gst_vaapi_display_cache_lookup_custom(cache, compare_display_name,
priv->display_name, GST_VAAPI_DISPLAY_TYPES(display));
if (info) {
priv->x11_display = info->native_display;
priv->use_foreign_display = TRUE;
}
else {
priv->x11_display = XOpenDisplay(get_display_name(display));
if (!priv->x11_display)
return FALSE;
priv->use_foreign_display = FALSE;
}
priv->x11_screen = DefaultScreen(priv->x11_display);
check_xrandr(display);
return TRUE;
}
static void
gst_vaapi_display_x11_close_display(GstVaapiDisplay *display)
{
GstVaapiDisplayX11Private * const priv =
GST_VAAPI_DISPLAY_X11_PRIVATE(display);
if (priv->x11_display) {
if (!priv->use_foreign_display)
XCloseDisplay(priv->x11_display);
priv->x11_display = NULL;
}
if (priv->display_name) {
g_free(priv->display_name);
priv->display_name = NULL;
}
}
static void
gst_vaapi_display_x11_sync(GstVaapiDisplay *display)
{
GstVaapiDisplayX11Private * const priv =
GST_VAAPI_DISPLAY_X11_PRIVATE(display);
if (priv->x11_display) {
GST_VAAPI_DISPLAY_LOCK(display);
XSync(priv->x11_display, False);
GST_VAAPI_DISPLAY_UNLOCK(display);
}
}
static void
gst_vaapi_display_x11_flush(GstVaapiDisplay *display)
{
GstVaapiDisplayX11Private * const priv =
GST_VAAPI_DISPLAY_X11_PRIVATE(display);
if (priv->x11_display) {
GST_VAAPI_DISPLAY_LOCK(display);
XFlush(priv->x11_display);
GST_VAAPI_DISPLAY_UNLOCK(display);
}
}
static gboolean
gst_vaapi_display_x11_get_display_info(
GstVaapiDisplay *display,
GstVaapiDisplayInfo *info
)
{
GstVaapiDisplayX11Private * const priv =
GST_VAAPI_DISPLAY_X11_PRIVATE(display);
GstVaapiDisplayCache *cache;
const GstVaapiDisplayInfo *cached_info;
/* Return any cached info even if child has its own VA display */
cache = gst_vaapi_display_get_cache();
if (!cache)
return FALSE;
cached_info = gst_vaapi_display_cache_lookup_by_native_display(
cache, priv->x11_display, GST_VAAPI_DISPLAY_TYPES(display));
if (cached_info) {
*info = *cached_info;
return TRUE;
}
/* Otherwise, create VA display if there is none already */
info->native_display = priv->x11_display;
info->display_name = priv->display_name;
if (!info->va_display) {
info->va_display = vaGetDisplay(priv->x11_display);
if (!info->va_display)
return FALSE;
info->display_type = GST_VAAPI_DISPLAY_TYPE_X11;
}
return TRUE;
}
static void
gst_vaapi_display_x11_get_size(
GstVaapiDisplay *display,
guint *pwidth,
guint *pheight
)
{
GstVaapiDisplayX11Private * const priv =
GST_VAAPI_DISPLAY_X11_PRIVATE(display);
if (!priv->x11_display)
return;
if (pwidth)
*pwidth = DisplayWidth(priv->x11_display, priv->x11_screen);
if (pheight)
*pheight = DisplayHeight(priv->x11_display, priv->x11_screen);
}
static void
gst_vaapi_display_x11_get_size_mm(
GstVaapiDisplay *display,
guint *pwidth,
guint *pheight
)
{
GstVaapiDisplayX11Private * const priv =
GST_VAAPI_DISPLAY_X11_PRIVATE(display);
guint width_mm, height_mm;
if (!priv->x11_display)
return;
width_mm = DisplayWidthMM(priv->x11_display, priv->x11_screen);
height_mm = DisplayHeightMM(priv->x11_display, priv->x11_screen);
#ifdef HAVE_XRANDR
/* XXX: fix up physical size if the display is rotated */
if (priv->use_xrandr) {
XRRScreenConfiguration *xrr_config = NULL;
XRRScreenSize *xrr_sizes;
Window win;
int num_xrr_sizes, size_id, screen;
Rotation rotation;
do {
win = DefaultRootWindow(priv->x11_display);
screen = XRRRootToScreen(priv->x11_display, win);
xrr_config = XRRGetScreenInfo(priv->x11_display, win);
if (!xrr_config)
break;
size_id = XRRConfigCurrentConfiguration(xrr_config, &rotation);
if (rotation == RR_Rotate_0 || rotation == RR_Rotate_180)
break;
xrr_sizes = XRRSizes(priv->x11_display, screen, &num_xrr_sizes);
if (!xrr_sizes || size_id >= num_xrr_sizes)
break;
width_mm = xrr_sizes[size_id].mheight;
height_mm = xrr_sizes[size_id].mwidth;
} while (0);
if (xrr_config)
XRRFreeScreenConfigInfo(xrr_config);
}
#endif
if (pwidth)
*pwidth = width_mm;
if (pheight)
*pheight = height_mm;
}
void
gst_vaapi_display_x11_class_init(GstVaapiDisplayX11Class *klass)
{
GstVaapiMiniObjectClass * const object_class =
GST_VAAPI_MINI_OBJECT_CLASS(klass);
GstVaapiDisplayClass * const dpy_class = GST_VAAPI_DISPLAY_CLASS(klass);
gst_vaapi_display_class_init(&klass->parent_class);
object_class->size = sizeof(GstVaapiDisplayX11);
dpy_class->display_types = g_display_types;
dpy_class->bind_display = gst_vaapi_display_x11_bind_display;
dpy_class->open_display = gst_vaapi_display_x11_open_display;
dpy_class->close_display = gst_vaapi_display_x11_close_display;
dpy_class->sync = gst_vaapi_display_x11_sync;
dpy_class->flush = gst_vaapi_display_x11_flush;
dpy_class->get_display = gst_vaapi_display_x11_get_display_info;
dpy_class->get_size = gst_vaapi_display_x11_get_size;
dpy_class->get_size_mm = gst_vaapi_display_x11_get_size_mm;
}
static inline const GstVaapiDisplayClass *
gst_vaapi_display_x11_class(void)
{
static GstVaapiDisplayX11Class g_class;
static gsize g_class_init = FALSE;
if (g_once_init_enter(&g_class_init)) {
gst_vaapi_display_x11_class_init(&g_class);
g_once_init_leave(&g_class_init, TRUE);
}
return GST_VAAPI_DISPLAY_CLASS(&g_class);
}
/**
* gst_vaapi_display_x11_new:
* @display_name: the X11 display name
*
* Opens an X11 #Display using @display_name and returns a newly
* allocated #GstVaapiDisplay object. The X11 display will be cloed
* when the reference count of the object reaches zero.
*
* Return value: a newly allocated #GstVaapiDisplay object
*/
GstVaapiDisplay *
gst_vaapi_display_x11_new(const gchar *display_name)
{
return gst_vaapi_display_new(gst_vaapi_display_x11_class(),
GST_VAAPI_DISPLAY_INIT_FROM_DISPLAY_NAME, (gpointer)display_name);
}
/**
* gst_vaapi_display_x11_new_with_display:
* @x11_display: an X11 #Display
*
* Creates a #GstVaapiDisplay based on the X11 @x11_display
* display. The caller still owns the display and must call
* XCloseDisplay() when all #GstVaapiDisplay references are
* released. Doing so too early can yield undefined behaviour.
*
* Return value: a newly allocated #GstVaapiDisplay object
*/
GstVaapiDisplay *
gst_vaapi_display_x11_new_with_display(Display *x11_display)
{
g_return_val_if_fail(x11_display, NULL);
return gst_vaapi_display_new(gst_vaapi_display_x11_class(),
GST_VAAPI_DISPLAY_INIT_FROM_NATIVE_DISPLAY, x11_display);
}
/**
* gst_vaapi_display_x11_get_display:
* @display: a #GstVaapiDisplayX11
*
* Returns the underlying X11 #Display that was created by
* gst_vaapi_display_x11_new() or that was bound from
* gst_vaapi_display_x11_new_with_display().
*
* Return value: the X11 #Display attached to @display
*/
Display *
gst_vaapi_display_x11_get_display(GstVaapiDisplayX11 *display)
{
g_return_val_if_fail(GST_VAAPI_IS_DISPLAY_X11(display), NULL);
return GST_VAAPI_DISPLAY_XDISPLAY(display);
}
/**
* gst_vaapi_display_x11_get_screen:
* @display: a #GstVaapiDisplayX11
*
* Returns the default X11 screen that was created by
* gst_vaapi_display_x11_new() or that was bound from
* gst_vaapi_display_x11_new_with_display().
*
* Return value: the X11 #Display attached to @display
*/
int
gst_vaapi_display_x11_get_screen(GstVaapiDisplayX11 *display)
{
g_return_val_if_fail(GST_VAAPI_IS_DISPLAY_X11(display), -1);
return GST_VAAPI_DISPLAY_XSCREEN(display);
}
/**
* gst_vaapi_display_x11_set_synchronous:
* @display: a #GstVaapiDisplayX11
* @synchronous: boolean value that indicates whether to enable or
* disable synchronization
*
* If @synchronous is %TRUE, gst_vaapi_display_x11_set_synchronous()
* turns on synchronous behaviour on the underlying X11
* display. Otherwise, synchronous behaviour is disabled if
* @synchronous is %FALSE.
*/
void
gst_vaapi_display_x11_set_synchronous(GstVaapiDisplayX11 *display,
gboolean synchronous)
{
g_return_if_fail(GST_VAAPI_IS_DISPLAY_X11(display));
set_synchronous(display, synchronous);
}