gstreamer/gst-libs/gst/vaapi/gstvaapidisplay_wayland.c
2012-07-25 15:31:42 +02:00

458 lines
13 KiB
C

/*
* gstvaapidisplay_wayland.c - VA/Wayland display abstraction
*
* Copyright (C) 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_wayland
* @short_description: VA/Wayland display abstraction
*/
#include "sysdeps.h"
#include <string.h>
#include "gstvaapidisplay_priv.h"
#include "gstvaapidisplay_wayland.h"
#include "gstvaapidisplay_wayland_priv.h"
#define DEBUG 1
#include "gstvaapidebug.h"
G_DEFINE_TYPE(GstVaapiDisplayWayland,
gst_vaapi_display_wayland,
GST_VAAPI_TYPE_DISPLAY);
enum {
PROP_0,
PROP_DISPLAY_NAME,
PROP_WL_DISPLAY
};
#define NAME_PREFIX "WLD:"
#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("WAYLAND_DISPLAY");
return g_display_name;
}
static inline guint
get_display_name_length(const gchar *display_name)
{
const gchar *str;
str = strchr(display_name, '-');
if (str)
return str - display_name;
return strlen(display_name);
}
static gboolean
compare_display_name(gconstpointer a, gconstpointer b, gpointer user_data)
{
const gchar *cached_name = a;
const gchar *tested_name = b;
guint cached_name_length, tested_name_length;
if (!cached_name || !is_display_name(cached_name))
return FALSE;
cached_name += NAME_PREFIX_LENGTH;
cached_name_length = get_display_name_length(cached_name);
g_return_val_if_fail(tested_name && is_display_name(tested_name), FALSE);
tested_name += NAME_PREFIX_LENGTH;
tested_name_length = get_display_name_length(tested_name);
/* XXX: handle screen number and default WAYLAND_DISPLAY name */
if (cached_name_length != tested_name_length)
return FALSE;
if (strncmp(cached_name, tested_name, cached_name_length) != 0)
return FALSE;
return TRUE;
}
static void
gst_vaapi_display_wayland_finalize(GObject *object)
{
G_OBJECT_CLASS(gst_vaapi_display_wayland_parent_class)->finalize(object);
}
/* Reconstruct a display name without our prefix */
static const gchar *
get_display_name(gpointer ptr)
{
GstVaapiDisplayWayland * const display = GST_VAAPI_DISPLAY_WAYLAND(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 */
static void
set_display_name(GstVaapiDisplayWayland *display, const gchar *display_name)
{
GstVaapiDisplayWaylandPrivate * 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);
}
static void
gst_vaapi_display_wayland_set_property(
GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec
)
{
GstVaapiDisplayWayland * const display = GST_VAAPI_DISPLAY_WAYLAND(object);
switch (prop_id) {
case PROP_DISPLAY_NAME:
set_display_name(display, g_value_get_string(value));
break;
case PROP_WL_DISPLAY:
display->priv->wl_display = g_value_get_pointer(value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gst_vaapi_display_wayland_get_property(
GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec
)
{
GstVaapiDisplayWayland * const display = GST_VAAPI_DISPLAY_WAYLAND(object);
switch (prop_id) {
case PROP_DISPLAY_NAME:
g_value_set_string(value, get_display_name(display));
break;
case PROP_WL_DISPLAY:
g_value_set_pointer(value, gst_vaapi_display_wayland_get_display(display));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gst_vaapi_display_wayland_constructed(GObject *object)
{
GstVaapiDisplayWayland * const display = GST_VAAPI_DISPLAY_WAYLAND(object);
GstVaapiDisplayWaylandPrivate * const priv = display->priv;
GstVaapiDisplayCache * const cache = gst_vaapi_display_get_cache();
const GstVaapiDisplayInfo *info;
GObjectClass *parent_class;
priv->create_display = priv->wl_display == NULL;
/* Don't create Wayland 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->wl_display = info->native_display;
priv->create_display = FALSE;
}
}
/* Reset display-name if the user provided his own Wayland display */
if (!priv->create_display) {
/* XXX: how to get socket/display name? */
GST_WARNING("wayland: get display name");
set_display_name(display, NULL);
}
parent_class = G_OBJECT_CLASS(gst_vaapi_display_wayland_parent_class);
if (parent_class->constructed)
parent_class->constructed(object);
}
static void
display_handle_global(
struct wl_display *display,
uint32_t id,
const char *interface,
uint32_t version,
void *data
)
{
GstVaapiDisplayWaylandPrivate * const priv = data;
if (strcmp(interface, "wl_compositor") == 0)
priv->compositor = wl_display_bind(display, id, &wl_compositor_interface);
else if (strcmp(interface, "wl_shell") == 0)
priv->shell = wl_display_bind(display, id, &wl_shell_interface);
}
static int
event_mask_update(uint32_t mask, void *data)
{
GstVaapiDisplayWaylandPrivate * const priv = data;
priv->event_mask = mask;
return 0;
}
static gboolean
gst_vaapi_display_wayland_open_display(GstVaapiDisplay * display)
{
GstVaapiDisplayWaylandPrivate * const priv =
GST_VAAPI_DISPLAY_WAYLAND(display)->priv;
if (!priv->create_display)
return priv->wl_display != NULL;
priv->wl_display = wl_display_connect(get_display_name(display));
if (!priv->wl_display)
return FALSE;
wl_display_set_user_data(priv->wl_display, priv);
wl_display_add_global_listener(priv->wl_display, display_handle_global, priv);
priv->event_fd = wl_display_get_fd(priv->wl_display, event_mask_update, priv);
wl_display_iterate(priv->wl_display, priv->event_mask);
wl_display_roundtrip(priv->wl_display);
if (!priv->compositor) {
GST_ERROR("failed to bind compositor interface");
return FALSE;
}
if (!priv->shell) {
GST_ERROR("failed to bind shell interface");
return FALSE;
}
return TRUE;
}
static void
gst_vaapi_display_wayland_close_display(GstVaapiDisplay * display)
{
GstVaapiDisplayWaylandPrivate * const priv =
GST_VAAPI_DISPLAY_WAYLAND(display)->priv;
if (priv->compositor) {
wl_compositor_destroy(priv->compositor);
priv->compositor = NULL;
}
if (priv->wl_display) {
if (priv->create_display)
wl_display_disconnect(priv->wl_display);
priv->wl_display = NULL;
}
if (priv->display_name) {
g_free(priv->display_name);
priv->display_name = NULL;
}
}
static gboolean
gst_vaapi_display_wayland_get_display_info(
GstVaapiDisplay *display,
GstVaapiDisplayInfo *info
)
{
GstVaapiDisplayWaylandPrivate * const priv =
GST_VAAPI_DISPLAY_WAYLAND(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->wl_display);
if (cached_info) {
*info = *cached_info;
return TRUE;
}
/* Otherwise, create VA display if there is none already */
info->native_display = priv->wl_display;
info->display_name = priv->display_name;
if (!info->va_display) {
info->va_display = vaGetDisplayWl(priv->wl_display);
if (!info->va_display)
return FALSE;
info->display_type = GST_VAAPI_DISPLAY_TYPE_WAYLAND;
}
return TRUE;
}
static void
gst_vaapi_display_wayland_class_init(GstVaapiDisplayWaylandClass * klass)
{
GObjectClass * const object_class = G_OBJECT_CLASS(klass);
GstVaapiDisplayClass * const dpy_class = GST_VAAPI_DISPLAY_CLASS(klass);
g_type_class_add_private(klass, sizeof(GstVaapiDisplayWaylandPrivate));
object_class->finalize = gst_vaapi_display_wayland_finalize;
object_class->set_property = gst_vaapi_display_wayland_set_property;
object_class->get_property = gst_vaapi_display_wayland_get_property;
object_class->constructed = gst_vaapi_display_wayland_constructed;
dpy_class->open_display = gst_vaapi_display_wayland_open_display;
dpy_class->close_display = gst_vaapi_display_wayland_close_display;
dpy_class->get_display = gst_vaapi_display_wayland_get_display_info;
/**
* GstVaapiDisplayWayland:wayland-display:
*
* The Wayland #wl_display that was created by
* gst_vaapi_display_wayland_new() or that was bound from
* gst_vaapi_display_wayland_new_with_display().
*/
g_object_class_install_property
(object_class,
PROP_WL_DISPLAY,
g_param_spec_pointer("wl-display",
"Wayland display",
"Wayland display",
G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
/**
* GstVaapiDisplayWayland:display-name:
*
* The Wayland display name.
*/
g_object_class_install_property
(object_class,
PROP_DISPLAY_NAME,
g_param_spec_string("display-name",
"Wayland display name",
"Wayland display name",
NULL,
G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
}
static void
gst_vaapi_display_wayland_init(GstVaapiDisplayWayland *display)
{
GstVaapiDisplayWaylandPrivate *priv =
GST_VAAPI_DISPLAY_WAYLAND_GET_PRIVATE(display);
display->priv = priv;
priv->create_display = TRUE;
priv->display_name = NULL;
priv->wl_display = NULL;
priv->compositor = NULL;
priv->shell = NULL;
priv->event_fd = -1;
priv->event_mask = 0;
}
/**
* gst_vaapi_display_wayland_new:
* @display_name: the Wayland display name
*
* Opens an Wayland #wl_display using @display_name and returns a
* newly allocated #GstVaapiDisplay object. The Wayland display will
* be cloed when the reference count of the object reaches zero.
*
* Return value: a newly allocated #GstVaapiDisplay object
*/
GstVaapiDisplay *
gst_vaapi_display_wayland_new(const gchar *display_name)
{
return g_object_new(GST_VAAPI_TYPE_DISPLAY_WAYLAND,
"display-name", display_name,
NULL);
}
/**
* gst_vaapi_display_wayland_new_with_display:
* @wl_display: an Wayland #wl_display
*
* Creates a #GstVaapiDisplay based on the Wayland @wl_display
* display. The caller still owns the display and must call
* wl_display_disconnect() 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_wayland_new_with_display(struct wl_display *wl_display)
{
g_return_val_if_fail(wl_display, NULL);
return g_object_new(GST_VAAPI_TYPE_DISPLAY_WAYLAND,
"wl-display", wl_display,
NULL);
}
/**
* gst_vaapi_display_wayland_get_display:
* @display: a #GstVaapiDisplayWayland
*
* Returns the underlying Wayland #wl_display that was created by
* gst_vaapi_display_wayland_new() or that was bound from
* gst_vaapi_display_wayland_new_with_display().
*
* Return value: the Wayland #wl_display attached to @display
*/
struct wl_display *
gst_vaapi_display_wayland_get_display(GstVaapiDisplayWayland *display)
{
g_return_val_if_fail(GST_VAAPI_IS_DISPLAY_WAYLAND(display), NULL);
return display->priv->wl_display;
}