gstreamer/gst-libs/gst/vaapi/gstvaapidisplay_x11.c

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/*
* gstvaapidisplay_x11.c - VA/X11 display abstraction
*
* Copyright (C) 2010-2011 Splitted-Desktop Systems
* Copyright (C) 2011-2012 Intel Corporation
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*
* 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.
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*
* This library is distributed in the hope that it will be useful,
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* 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.
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*
* 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
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*/
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/**
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* SECTION:gstvaapidisplay_x11
* @short_description: VA/X11 display abstraction
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*/
#include "sysdeps.h"
#include <string.h>
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#include "gstvaapiutils.h"
#include "gstvaapidisplay_priv.h"
#include "gstvaapidisplay_x11.h"
#include "gstvaapidisplay_x11_priv.h"
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#ifdef HAVE_XRANDR
# include <X11/extensions/Xrandr.h>
#endif
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#define DEBUG 1
#include "gstvaapidebug.h"
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G_DEFINE_TYPE(GstVaapiDisplayX11,
gst_vaapi_display_x11,
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GST_VAAPI_TYPE_DISPLAY)
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enum {
PROP_0,
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PROP_SYNCHRONOUS,
PROP_DISPLAY_NAME,
PROP_X11_DISPLAY,
PROP_X11_SCREEN
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};
#define NAME_PREFIX "X11:"
#define NAME_PREFIX_LENGTH 4
static inline gboolean
is_display_name(const gchar *display_name)
{
return strncmp(display_name, NAME_PREFIX, NAME_PREFIX_LENGTH) == 0;
}
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 gboolean
compare_display_name(gconstpointer a, gconstpointer b, gpointer user_data)
{
const gchar *cached_name = a, *cached_name_end;
const gchar *tested_name = b, *tested_name_end;
guint cached_name_length, tested_name_length;
if (!cached_name || !is_display_name(cached_name))
return FALSE;
g_return_val_if_fail(tested_name && is_display_name(tested_name), FALSE);
cached_name += NAME_PREFIX_LENGTH;
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 += NAME_PREFIX_LENGTH;
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;
}
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static void
gst_vaapi_display_x11_finalize(GObject *object)
{
G_OBJECT_CLASS(gst_vaapi_display_x11_parent_class)->finalize(object);
}
/* Reconstruct a display name without our prefix */
static const gchar *
get_display_name(gpointer ptr)
{
GstVaapiDisplayX11 * const display = GST_VAAPI_DISPLAY_X11(ptr);
const gchar *display_name = display->priv->display_name;
if (!display_name)
return NULL;
if (is_display_name(display_name)) {
display_name += NAME_PREFIX_LENGTH;
if (*display_name == '\0')
return NULL;
return display_name;
}
/* XXX: this should not happen */
g_assert(0 && "display name without prefix");
return display_name;
}
/* Mangle display name with our prefix */
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static void
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_printf("%s%s", NAME_PREFIX, display_name);
}
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static void
set_synchronous(GstVaapiDisplayX11 *display, gboolean synchronous)
{
GstVaapiDisplayX11Private * const priv = display->priv;
if (priv->synchronous != synchronous) {
priv->synchronous = synchronous;
if (priv->x11_display)
XSynchronize(priv->x11_display, synchronous);
}
}
static void
gst_vaapi_display_x11_set_property(
GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec
)
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{
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GstVaapiDisplayX11 * const display = GST_VAAPI_DISPLAY_X11(object);
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switch (prop_id) {
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case PROP_SYNCHRONOUS:
set_synchronous(display, g_value_get_boolean(value));
break;
case PROP_DISPLAY_NAME:
set_display_name(display, g_value_get_string(value));
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break;
case PROP_X11_DISPLAY:
display->priv->x11_display = g_value_get_pointer(value);
break;
case PROP_X11_SCREEN:
display->priv->x11_screen = g_value_get_int(value);
break;
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default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gst_vaapi_display_x11_get_property(
GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec
)
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{
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GstVaapiDisplayX11 * const display = GST_VAAPI_DISPLAY_X11(object);
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switch (prop_id) {
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case PROP_SYNCHRONOUS:
g_value_set_boolean(value, display->priv->synchronous);
break;
case PROP_DISPLAY_NAME:
g_value_set_string(value, get_display_name(display));
break;
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case PROP_X11_DISPLAY:
g_value_set_pointer(value, gst_vaapi_display_x11_get_display(display));
break;
case PROP_X11_SCREEN:
g_value_set_int(value, gst_vaapi_display_x11_get_screen(display));
break;
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default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gst_vaapi_display_x11_constructed(GObject *object)
{
GstVaapiDisplayX11 * const display = GST_VAAPI_DISPLAY_X11(object);
GstVaapiDisplayX11Private * const priv = display->priv;
GstVaapiDisplayCache * const cache = gst_vaapi_display_get_cache();
const GstVaapiDisplayInfo *info;
GObjectClass *parent_class;
priv->create_display = priv->x11_display == NULL;
/* Don't create X11 display if there is one in the cache already */
if (priv->create_display) {
info = gst_vaapi_display_cache_lookup_by_name(
cache,
priv->display_name,
compare_display_name, NULL
);
if (info) {
priv->x11_display = info->native_display;
priv->create_display = FALSE;
}
}
/* Reset display-name if the user provided his own X11 display */
if (!priv->create_display)
set_display_name(display, XDisplayString(priv->x11_display));
parent_class = G_OBJECT_CLASS(gst_vaapi_display_x11_parent_class);
if (parent_class->constructed)
parent_class->constructed(object);
}
static gboolean
gst_vaapi_display_x11_open_display(GstVaapiDisplay *display)
{
GstVaapiDisplayX11Private * const priv =
GST_VAAPI_DISPLAY_X11(display)->priv;
if (priv->create_display) {
priv->x11_display = XOpenDisplay(get_display_name(display));
if (!priv->x11_display)
return FALSE;
priv->x11_screen = DefaultScreen(priv->x11_display);
}
if (!priv->x11_display)
return FALSE;
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if (priv->synchronous)
XSynchronize(priv->x11_display, True);
#ifdef HAVE_XRANDR
{
int evt_base, err_base;
priv->use_xrandr = XRRQueryExtension(
priv->x11_display, &evt_base, &err_base);
}
#endif
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return TRUE;
}
static void
gst_vaapi_display_x11_close_display(GstVaapiDisplay *display)
{
GstVaapiDisplayX11Private * const priv =
GST_VAAPI_DISPLAY_X11(display)->priv;
if (priv->x11_display) {
if (priv->create_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(display)->priv;
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if (priv->x11_display) {
GST_VAAPI_DISPLAY_LOCK(display);
XSync(priv->x11_display, False);
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GST_VAAPI_DISPLAY_UNLOCK(display);
}
}
static void
gst_vaapi_display_x11_flush(GstVaapiDisplay *display)
{
GstVaapiDisplayX11Private * const priv =
GST_VAAPI_DISPLAY_X11(display)->priv;
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if (priv->x11_display) {
GST_VAAPI_DISPLAY_LOCK(display);
XFlush(priv->x11_display);
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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(display)->priv;
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);
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;
}
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static void
gst_vaapi_display_x11_get_size(
GstVaapiDisplay *display,
guint *pwidth,
guint *pheight
)
{
GstVaapiDisplayX11Private * const priv =
GST_VAAPI_DISPLAY_X11(display)->priv;
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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(display)->priv;
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;
}
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static void
gst_vaapi_display_x11_class_init(GstVaapiDisplayX11Class *klass)
{
GObjectClass * const object_class = G_OBJECT_CLASS(klass);
GstVaapiDisplayClass * const dpy_class = GST_VAAPI_DISPLAY_CLASS(klass);
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g_type_class_add_private(klass, sizeof(GstVaapiDisplayX11Private));
object_class->finalize = gst_vaapi_display_x11_finalize;
object_class->set_property = gst_vaapi_display_x11_set_property;
object_class->get_property = gst_vaapi_display_x11_get_property;
object_class->constructed = gst_vaapi_display_x11_constructed;
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;
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dpy_class->get_size = gst_vaapi_display_x11_get_size;
dpy_class->get_size_mm = gst_vaapi_display_x11_get_size_mm;
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/**
* GstVaapiDisplayX11:synchronous:
*
* When enabled, runs the X display in synchronous mode. Note that
* this is used only for debugging.
*/
g_object_class_install_property
(object_class,
PROP_SYNCHRONOUS,
g_param_spec_boolean("synchronous",
"Synchronous mode",
"Toggles X display synchronous mode",
FALSE,
G_PARAM_READWRITE));
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/**
* GstVaapiDisplayX11:x11-display:
*
* The X11 #Display that was created by gst_vaapi_display_x11_new()
* or that was bound from gst_vaapi_display_x11_new_with_display().
*/
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g_object_class_install_property
(object_class,
PROP_X11_DISPLAY,
g_param_spec_pointer("x11-display",
"X11 display",
"X11 display",
G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
/**
* GstVaapiDisplayX11:x11-screen:
*
* The X11 screen that was created by gst_vaapi_display_x11_new()
* or that was bound from gst_vaapi_display_x11_new_with_display().
*/
g_object_class_install_property
(object_class,
PROP_X11_SCREEN,
g_param_spec_int("x11-screen",
"X11 screen",
"X11 screen",
0, G_MAXINT32, 0,
G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
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/**
* GstVaapiDisplayX11:display-name:
*
* The X11 display name.
*/
g_object_class_install_property
(object_class,
PROP_DISPLAY_NAME,
g_param_spec_string("display-name",
"X11 display name",
"X11 display name",
NULL,
G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
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}
static void
gst_vaapi_display_x11_init(GstVaapiDisplayX11 *display)
{
GstVaapiDisplayX11Private *priv = GST_VAAPI_DISPLAY_X11_GET_PRIVATE(display);
display->priv = priv;
priv->create_display = TRUE;
priv->x11_display = NULL;
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priv->x11_screen = 0;
priv->display_name = NULL;
priv->use_xrandr = FALSE;
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}
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/**
* 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)
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{
return g_object_new(GST_VAAPI_TYPE_DISPLAY_X11,
"display-name", display_name,
NULL);
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}
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/**
* 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 g_object_new(GST_VAAPI_TYPE_DISPLAY_X11,
"x11-display", x11_display,
"x11-screen", DefaultScreen(x11_display),
NULL);
}
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/**
* 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)
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{
g_return_val_if_fail(GST_VAAPI_IS_DISPLAY_X11(display), NULL);
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return display->priv->x11_display;
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}
/**
* 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 display->priv->x11_screen;
}