gstreamer/gst-libs/gst/vaapi/gstvaapidisplay_wayland.c
Gwenole Beauchesne 15519ebe3d legal: add per-file authorship information.
Credit original authors on a per-file basis as we cannot expect people
to know all country-specific rules, or bother browsing through the git
history.
2013-11-22 06:39:15 +01:00

438 lines
13 KiB
C

/*
* gstvaapidisplay_wayland.c - VA/Wayland display abstraction
*
* Copyright (C) 2012-2013 Intel Corporation
* Author: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
*
* 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"
static const guint g_display_types = 1U << GST_VAAPI_DISPLAY_TYPE_WAYLAND;
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 gint
compare_display_name(gconstpointer a, gconstpointer b)
{
const GstVaapiDisplayInfo * const info = a;
const gchar *cached_name = info->display_name;
const gchar *tested_name = b;
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_length = get_display_name_length(cached_name);
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;
}
/* Mangle display name with our prefix */
static gboolean
set_display_name(GstVaapiDisplay *display, const gchar *display_name)
{
GstVaapiDisplayWaylandPrivate * const priv =
GST_VAAPI_DISPLAY_WAYLAND_GET_PRIVATE(display);
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;
}
static void
output_handle_geometry(void *data, struct wl_output *output,
int x, int y, int physical_width, int physical_height,
int subpixel, const char *make, const char *model,
int transform)
{
GstVaapiDisplayWaylandPrivate * const priv = data;
priv->phys_width = physical_width;
priv->phys_height = physical_height;
}
static void
output_handle_mode(void *data, struct wl_output *wl_output,
uint32_t flags, int width, int height, int refresh)
{
GstVaapiDisplayWaylandPrivate * const priv = data;
if (flags & WL_OUTPUT_MODE_CURRENT) {
priv->width = width;
priv->height = height;
}
}
static const struct wl_output_listener output_listener = {
output_handle_geometry,
output_handle_mode,
};
static void
registry_handle_global(
void *data,
struct wl_registry *registry,
uint32_t id,
const char *interface,
uint32_t version
)
{
GstVaapiDisplayWaylandPrivate * const priv = data;
if (strcmp(interface, "wl_compositor") == 0)
priv->compositor =
wl_registry_bind(registry, id, &wl_compositor_interface, 1);
else if (strcmp(interface, "wl_shell") == 0)
priv->shell = wl_registry_bind(registry, id, &wl_shell_interface, 1);
else if (strcmp(interface, "wl_output") == 0) {
priv->output = wl_registry_bind(registry, id, &wl_output_interface, 1);
wl_output_add_listener(priv->output, &output_listener, priv);
}
}
static const struct wl_registry_listener registry_listener = {
registry_handle_global,
NULL,
};
static gboolean
gst_vaapi_display_wayland_setup(GstVaapiDisplay *display)
{
GstVaapiDisplayWaylandPrivate * const priv =
GST_VAAPI_DISPLAY_WAYLAND_GET_PRIVATE(display);
wl_display_set_user_data(priv->wl_display, priv);
priv->registry = wl_display_get_registry(priv->wl_display);
wl_registry_add_listener(priv->registry, &registry_listener, priv);
priv->event_fd = wl_display_get_fd(priv->wl_display);
wl_display_roundtrip(priv->wl_display);
if (!priv->width || !priv->height) {
wl_display_roundtrip(priv->wl_display);
if (!priv->width || !priv->height) {
GST_ERROR("failed to determine the display size");
return FALSE;
}
}
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 gboolean
gst_vaapi_display_wayland_bind_display(GstVaapiDisplay *display,
gpointer native_display)
{
GstVaapiDisplayWaylandPrivate * const priv =
GST_VAAPI_DISPLAY_WAYLAND_GET_PRIVATE(display);
priv->wl_display = native_display;
priv->use_foreign_display = TRUE;
/* XXX: how to get socket/display name? */
GST_WARNING("wayland: get display name");
set_display_name(display, NULL);
return gst_vaapi_display_wayland_setup(display);
}
static gboolean
gst_vaapi_display_wayland_open_display(GstVaapiDisplay *display,
const gchar *name)
{
GstVaapiDisplayWaylandPrivate * const priv =
GST_VAAPI_DISPLAY_WAYLAND_GET_PRIVATE(display);
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->wl_display = info->native_display;
priv->use_foreign_display = TRUE;
}
else {
priv->wl_display = wl_display_connect(name);
if (!priv->wl_display)
return FALSE;
priv->use_foreign_display = FALSE;
}
return gst_vaapi_display_wayland_setup(display);
}
static void
gst_vaapi_display_wayland_close_display(GstVaapiDisplay * display)
{
GstVaapiDisplayWaylandPrivate * const priv =
GST_VAAPI_DISPLAY_WAYLAND_GET_PRIVATE(display);
if (priv->output) {
wl_output_destroy(priv->output);
priv->output = NULL;
}
if (priv->shell) {
wl_shell_destroy(priv->shell);
priv->shell = NULL;
}
if (priv->compositor) {
wl_compositor_destroy(priv->compositor);
priv->compositor = NULL;
}
if (priv->wl_display) {
if (!priv->use_foreign_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_GET_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->wl_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->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_get_size(
GstVaapiDisplay *display,
guint *pwidth,
guint *pheight
)
{
GstVaapiDisplayWaylandPrivate * const priv =
GST_VAAPI_DISPLAY_WAYLAND_GET_PRIVATE(display);
if (!priv->output)
return;
if (pwidth)
*pwidth = priv->width;
if (pheight)
*pheight = priv->height;
}
static void
gst_vaapi_display_wayland_get_size_mm(
GstVaapiDisplay *display,
guint *pwidth,
guint *pheight
)
{
GstVaapiDisplayWaylandPrivate * const priv =
GST_VAAPI_DISPLAY_WAYLAND_GET_PRIVATE(display);
if (!priv->output)
return;
if (pwidth)
*pwidth = priv->phys_width;
if (pheight)
*pheight = priv->phys_height;
}
static void
gst_vaapi_display_wayland_init(GstVaapiDisplay *display)
{
GstVaapiDisplayWaylandPrivate * const priv =
GST_VAAPI_DISPLAY_WAYLAND_GET_PRIVATE(display);
priv->event_fd = -1;
}
static void
gst_vaapi_display_wayland_class_init(GstVaapiDisplayWaylandClass * 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(GstVaapiDisplayWayland);
dpy_class->display_types = g_display_types;
dpy_class->init = gst_vaapi_display_wayland_init;
dpy_class->bind_display = gst_vaapi_display_wayland_bind_display;
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;
dpy_class->get_size = gst_vaapi_display_wayland_get_size;
dpy_class->get_size_mm = gst_vaapi_display_wayland_get_size_mm;
}
static inline const GstVaapiDisplayClass *
gst_vaapi_display_wayland_class(void)
{
static GstVaapiDisplayWaylandClass g_class;
static gsize g_class_init = FALSE;
if (g_once_init_enter(&g_class_init)) {
gst_vaapi_display_wayland_class_init(&g_class);
g_once_init_leave(&g_class_init, TRUE);
}
return GST_VAAPI_DISPLAY_CLASS(&g_class);
}
/**
* 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 gst_vaapi_display_new(gst_vaapi_display_wayland_class(),
GST_VAAPI_DISPLAY_INIT_FROM_DISPLAY_NAME, (gpointer)display_name);
}
/**
* 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 gst_vaapi_display_new(gst_vaapi_display_wayland_class(),
GST_VAAPI_DISPLAY_INIT_FROM_NATIVE_DISPLAY, wl_display);
}
/**
* 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 GST_VAAPI_DISPLAY_WL_DISPLAY(display);
}