gstreamer/gst-libs/gst/vulkan/gstvkdisplay.c
2019-11-11 11:04:59 +11:00

683 lines
17 KiB
C

/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvkdisplay.h"
#if GST_VULKAN_HAVE_WINDOW_XCB
#include "xcb/gstvkdisplay_xcb.h"
#endif
#if GST_VULKAN_HAVE_WINDOW_WAYLAND
#include "wayland/gstvkdisplay_wayland.h"
#endif
#if GST_VULKAN_HAVE_WINDOW_COCOA
#include "cocoa/gstvkdisplay_cocoa.h"
#endif
#if GST_VULKAN_HAVE_WINDOW_IOS
#include "ios/gstvkdisplay_ios.h"
#endif
#if GST_VULKAN_HAVE_WINDOW_WIN32
#include "win32/gstvkwindow_win32.h"
#endif
#if GST_VULKAN_HAVE_WINDOW_ANDROID
#include "android/gstvkdisplay_android.h"
#endif
/**
* SECTION:vkdisplay
* @title: GstVulkanDisplay
* @short_description: window system display
* @see_also: #GstVulkanInstance, #GstVulkanWindow
*
* A #GstVulkanDisplay represents a connection to a display server on the platform
*/
GST_DEBUG_CATEGORY_STATIC (GST_CAT_CONTEXT);
#define GST_CAT_DEFAULT gst_vulkan_display_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
static void
_init_debug (void)
{
static volatile gsize _init = 0;
if (g_once_init_enter (&_init)) {
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "vulkandisplay", 0,
"Vulkan display");
GST_DEBUG_CATEGORY_GET (GST_CAT_CONTEXT, "GST_CONTEXT");
g_once_init_leave (&_init, 1);
}
}
enum
{
SIGNAL_0,
CREATE_CONTEXT,
LAST_SIGNAL
};
/* static guint gst_vulkan_display_signals[LAST_SIGNAL] = { 0 }; */
static void gst_vulkan_display_finalize (GObject * object);
static gpointer gst_vulkan_display_default_get_handle (GstVulkanDisplay *
display);
static GstVulkanWindow
* gst_vulkan_display_default_create_window (GstVulkanDisplay * display);
struct _GstVulkanDisplayPrivate
{
GThread *event_thread;
GMutex thread_lock;
GCond thread_cond;
};
#define GET_PRIV(display) gst_vulkan_display_get_instance_private (display)
G_DEFINE_TYPE_WITH_CODE (GstVulkanDisplay, gst_vulkan_display, GST_TYPE_OBJECT,
G_ADD_PRIVATE (GstVulkanDisplay) _init_debug ());
static gpointer
_event_thread_main (GstVulkanDisplay * display)
{
GstVulkanDisplayPrivate *priv = GET_PRIV (display);
g_mutex_lock (&priv->thread_lock);
display->main_context = g_main_context_new ();
display->main_loop = g_main_loop_new (display->main_context, FALSE);
g_cond_broadcast (&priv->thread_cond);
g_mutex_unlock (&priv->thread_lock);
g_main_loop_run (display->main_loop);
g_mutex_lock (&priv->thread_lock);
g_main_loop_unref (display->main_loop);
g_main_context_unref (display->main_context);
display->main_loop = NULL;
display->main_context = NULL;
g_cond_broadcast (&priv->thread_cond);
g_mutex_unlock (&priv->thread_lock);
return NULL;
}
static void
gst_vulkan_display_class_init (GstVulkanDisplayClass * klass)
{
klass->get_handle = gst_vulkan_display_default_get_handle;
klass->create_window = gst_vulkan_display_default_create_window;
G_OBJECT_CLASS (klass)->finalize = gst_vulkan_display_finalize;
}
static void
gst_vulkan_display_init (GstVulkanDisplay * display)
{
GstVulkanDisplayPrivate *priv = GET_PRIV (display);
display->type = GST_VULKAN_DISPLAY_TYPE_ANY;
g_mutex_init (&priv->thread_lock);
g_cond_init (&priv->thread_cond);
priv->event_thread = g_thread_new ("vkdisplay-event",
(GThreadFunc) _event_thread_main, display);
g_mutex_lock (&priv->thread_lock);
while (!display->main_loop)
g_cond_wait (&priv->thread_cond, &priv->thread_lock);
g_mutex_unlock (&priv->thread_lock);
}
static void
free_window_weak_ref (GWeakRef * ref)
{
if (!ref)
return;
g_weak_ref_clear (ref);
g_free (ref);
}
static void
gst_vulkan_display_finalize (GObject * object)
{
GstVulkanDisplay *display = GST_VULKAN_DISPLAY (object);
GstVulkanDisplayPrivate *priv = GET_PRIV (display);
g_mutex_lock (&priv->thread_lock);
if (display->main_loop)
g_main_loop_quit (display->main_loop);
while (display->main_loop)
g_cond_wait (&priv->thread_cond, &priv->thread_lock);
if (priv->event_thread)
g_thread_unref (priv->event_thread);
priv->event_thread = NULL;
g_mutex_unlock (&priv->thread_lock);
if (display->event_source) {
g_source_destroy (display->event_source);
g_source_unref (display->event_source);
}
display->event_source = NULL;
GST_OBJECT_LOCK (display);
g_list_free_full (display->windows, (GDestroyNotify) free_window_weak_ref);
display->windows = NULL;
GST_OBJECT_UNLOCK (display);
if (display->instance) {
gst_object_unref (display->instance);
}
G_OBJECT_CLASS (gst_vulkan_display_parent_class)->finalize (object);
}
/**
* gst_vulkan_display_new_with_type:
* @instance: a #GstVulkanInstance
* @type: the #GstVulkanDisplayType to create
*
* Returns: (transfer full): a new #GstVulkanDisplay or %NULL if e.g. @type is
* unsupported
*
* Since: 1.18
*/
GstVulkanDisplay *
gst_vulkan_display_new_with_type (GstVulkanInstance * instance,
GstVulkanDisplayType type)
{
GstVulkanDisplay *display = NULL;
_init_debug ();
#if GST_VULKAN_HAVE_WINDOW_XCB
if (!display && type & GST_VULKAN_DISPLAY_TYPE_XCB) {
display = GST_VULKAN_DISPLAY (gst_vulkan_display_xcb_new (NULL));
}
#endif
#if GST_VULKAN_HAVE_WINDOW_WAYLAND
if (!display && type & GST_VULKAN_DISPLAY_TYPE_WAYLAND) {
display = GST_VULKAN_DISPLAY (gst_vulkan_display_wayland_new (NULL));
}
#endif
#if GST_VULKAN_HAVE_WINDOW_COCOA
if (!display && type & GST_VULKAN_DISPLAY_TYPE_COCOA) {
display = GST_VULKAN_DISPLAY (gst_vulkan_display_cocoa_new ());
}
#endif
#if GST_VULKAN_HAVE_WINDOW_IOS
if (!display && type & GST_VULKAN_DISPLAY_TYPE_IOS) {
display = GST_VULKAN_DISPLAY (gst_vulkan_display_ios_new ());
}
#endif
#if GST_VULKAN_HAVE_WINDOW_ANDROID
if (!display && type & GST_VULKAN_DISPLAY_TYPE_ANDROID) {
display = GST_VULKAN_DISPLAY (gst_vulkan_display_android_new ());
}
#endif
if (display)
display->instance = gst_object_ref (instance);
return display;
}
/**
* gst_vulkan_display_new:
*
* Returns: (transfer full): a new #GstVulkanDisplay
*
* Since: 1.18
*/
GstVulkanDisplay *
gst_vulkan_display_new (GstVulkanInstance * instance)
{
GstVulkanDisplayType type;
GstVulkanDisplay *display = NULL;
type = gst_vulkan_display_choose_type (instance);
display = gst_vulkan_display_new_with_type (instance, type);
if (!display) {
/* subclass returned a NULL display */
GST_FIXME ("creating dummy display");
display = g_object_new (GST_TYPE_VULKAN_DISPLAY, NULL);
gst_object_ref_sink (display);
display->instance = gst_object_ref (instance);
}
return display;
}
/**
* gst_vulkan_display_get_handle:
* @display: a #GstVulkanDisplay
*
* Returns: the winsys specific handle of @display
*
* Since: 1.18
*/
gpointer
gst_vulkan_display_get_handle (GstVulkanDisplay * display)
{
GstVulkanDisplayClass *klass;
g_return_val_if_fail (GST_IS_VULKAN_DISPLAY (display), NULL);
klass = GST_VULKAN_DISPLAY_GET_CLASS (display);
g_return_val_if_fail (klass->get_handle != NULL, NULL);
return klass->get_handle (display);
}
static gpointer
gst_vulkan_display_default_get_handle (GstVulkanDisplay * display)
{
return 0;
}
/**
* gst_vulkan_display_get_handle_type:
* @display: a #GstVulkanDisplay
*
* Returns: the #GstVulkanDisplayType of @display
*
* Since: 1.18
*/
GstVulkanDisplayType
gst_vulkan_display_get_handle_type (GstVulkanDisplay * display)
{
g_return_val_if_fail (GST_IS_VULKAN_DISPLAY (display),
GST_VULKAN_DISPLAY_TYPE_NONE);
return display->type;
}
/**
* gst_vulkan_display_create_window:
* @display: a #GstVulkanDisplay
*
* Returns: (transfer full): a new #GstVulkanWindow for @display or %NULL.
*
* Since: 1.18
*/
GstVulkanWindow *
gst_vulkan_display_create_window (GstVulkanDisplay * display)
{
GstVulkanDisplayClass *klass;
GstVulkanWindow *window;
g_return_val_if_fail (GST_IS_VULKAN_DISPLAY (display), NULL);
klass = GST_VULKAN_DISPLAY_GET_CLASS (display);
g_return_val_if_fail (klass->create_window != NULL, NULL);
window = klass->create_window (display);
if (window) {
GWeakRef *ref = g_new0 (GWeakRef, 1);
g_weak_ref_set (ref, window);
GST_OBJECT_LOCK (display);
display->windows = g_list_prepend (display->windows, ref);
GST_OBJECT_UNLOCK (display);
}
return window;
}
static GstVulkanWindow *
gst_vulkan_display_default_create_window (GstVulkanDisplay * display)
{
return gst_vulkan_window_new (display);
}
static gint
_compare_vulkan_window (GWeakRef * ref, GstVulkanWindow * window)
{
GstVulkanWindow *other = g_weak_ref_get (ref);
gboolean equal = window == other;
if (other)
gst_object_unref (other);
return !equal;
}
static GList *
_find_window_list_item (GstVulkanDisplay * display, GstVulkanWindow * window)
{
GList *l;
if (!window)
return NULL;
l = g_list_find_custom (display->windows, window,
(GCompareFunc) _compare_vulkan_window);
return l;
}
/**
* gst_vulkan_display_remove_window:
* @display: a #GstVUlkanDisplay:
* @window: the #GstVulkanWindow to remove
*
* Returns: whether the window was successfully removed
*
* Since: 1.18
*/
gboolean
gst_vulkan_display_remove_window (GstVulkanDisplay * display,
GstVulkanWindow * window)
{
gboolean ret = FALSE;
GList *l;
GST_OBJECT_LOCK (display);
l = _find_window_list_item (display, window);
if (l) {
GWeakRef *ref = l->data;
display->windows = g_list_delete_link (display->windows, l);
free_window_weak_ref (ref);
ret = TRUE;
}
GST_OBJECT_UNLOCK (display);
return ret;
}
/**
* gst_context_set_vulkan_display:
* @context: a #GstContext
* @display: a #GstVulkanDisplay
*
* Sets @display on @context
*
* Since: 1.18
*/
void
gst_context_set_vulkan_display (GstContext * context,
GstVulkanDisplay * display)
{
GstStructure *s;
g_return_if_fail (context != NULL);
g_return_if_fail (gst_context_is_writable (context));
if (display)
GST_CAT_LOG (GST_CAT_CONTEXT,
"setting GstVulkanDisplay(%" GST_PTR_FORMAT ") on context(%"
GST_PTR_FORMAT ")", display, context);
s = gst_context_writable_structure (context);
gst_structure_set (s, GST_VULKAN_DISPLAY_CONTEXT_TYPE_STR,
GST_TYPE_VULKAN_DISPLAY, display, NULL);
}
/**
* gst_context_get_vulkan_display:
* @context: a #GstContext
* @display: resulting #GstVulkanDisplay
*
* Returns: Whether @display was in @context
*
* Since: 1.18
*/
gboolean
gst_context_get_vulkan_display (GstContext * context,
GstVulkanDisplay ** display)
{
const GstStructure *s;
gboolean ret;
g_return_val_if_fail (display != NULL, FALSE);
g_return_val_if_fail (context != NULL, FALSE);
s = gst_context_get_structure (context);
ret = gst_structure_get (s, GST_VULKAN_DISPLAY_CONTEXT_TYPE_STR,
GST_TYPE_VULKAN_DISPLAY, display, NULL);
GST_CAT_LOG (GST_CAT_CONTEXT, "got GstVulkanDisplay(%" GST_PTR_FORMAT
") from context(%" GST_PTR_FORMAT ")", *display, context);
return ret;
}
/**
* gst_vulkan_display_choose_type:
* @instance: a #GstVulkanInstance
*
* This function will read the %GST_VULKAN_WINDOW environment variable for
* a user choice or choose the first supported implementation.
*
* Returns: the default #GstVulkanDisplayType #GstVulkanInstance will choose
* on creation
*
* Since: 1.18
*/
GstVulkanDisplayType
gst_vulkan_display_choose_type (GstVulkanInstance * instance)
{
const gchar *window_str;
GstVulkanDisplayType type = GST_VULKAN_DISPLAY_TYPE_NONE;
GstVulkanDisplayType first_supported = GST_VULKAN_DISPLAY_TYPE_NONE;
window_str = g_getenv ("GST_VULKAN_WINDOW");
/* FIXME: enumerate instance extensions for the supported winsys' */
#define CHOOSE_WINSYS(lname,uname) \
G_STMT_START { \
if (!type && g_strcmp0 (window_str, G_STRINGIFY (lname)) == 0) { \
type = G_PASTE(GST_VULKAN_DISPLAY_TYPE_,uname); \
} \
if (!first_supported) \
first_supported = G_PASTE(GST_VULKAN_DISPLAY_TYPE_,uname); \
} G_STMT_END
#if GST_VULKAN_HAVE_WINDOW_XCB
CHOOSE_WINSYS (xcb, XCB);
#endif
#if GST_VULKAN_HAVE_WINDOW_WAYLAND
CHOOSE_WINSYS (wayland, WAYLAND);
#endif
#if GST_VULKAN_HAVE_WINDOW_COCOA
CHOOSE_WINSYS (cocoa, COCOA);
#endif
#if GST_VULKAN_HAVE_WINDOW_IOS
CHOOSE_WINSYS (ios, IOS);
#endif
#undef CHOOSE_WINSYS
#if GST_VULKAN_HAVE_WINDOW_WIN32
/* CHOOSE_WINSYS macro doesn't work with "WIN32" */
if (!type && g_strcmp0 (window_str, "win32") == 0) {
type = GST_VULKAN_DISPLAY_TYPE_WIN32;
}
if (!first_supported)
first_supported = GST_VULKAN_DISPLAY_TYPE_WIN32;
#endif
#if GST_VULKAN_HAVE_WINDOW_ANDROID
/* CHOOSE_WINSYS macro doesn't work with "ANDROID" */
if (!type && g_strcmp0 (window_str, "android") == 0) {
type = GST_VULKAN_DISPLAY_TYPE_ANDROID;
}
if (!first_supported)
first_supported = GST_VULKAN_DISPLAY_TYPE_ANDROID;
#endif
/* if there are no winsys enabled at build time, we get a 'unused but set'
* warning. Remove that. */
(void) window_str;
if (type)
return type;
if (first_supported)
return first_supported;
return GST_VULKAN_DISPLAY_TYPE_NONE;
}
/**
* gst_vulkan_display_type_to_extension_string:
* @type: a #GstVulkanDisplayType
*
* Returns: the Vulkan extension string required for creating a VkSurfaceKHR
* using a window system handle or %NULL
*
* Since: 1.18
*/
const gchar *
gst_vulkan_display_type_to_extension_string (GstVulkanDisplayType type)
{
if (type == GST_VULKAN_DISPLAY_TYPE_NONE)
return NULL;
#if GST_VULKAN_HAVE_WINDOW_XCB
if (type & GST_VULKAN_DISPLAY_TYPE_XCB)
return VK_KHR_XCB_SURFACE_EXTENSION_NAME;
#endif
#if GST_VULKAN_HAVE_WINDOW_WAYLAND
if (type & GST_VULKAN_DISPLAY_TYPE_WAYLAND)
return VK_KHR_WAYLAND_SURFACE_EXTENSION_NAME;
#endif
#if GST_VULKAN_HAVE_WINDOW_COCOA
if (type & GST_VULKAN_DISPLAY_TYPE_COCOA)
return VK_MVK_MACOS_SURFACE_EXTENSION_NAME;
#endif
#if GST_VULKAN_HAVE_WINDOW_IOS
if (type & GST_VULKAN_DISPLAY_TYPE_IOS)
return VK_MVK_IOS_SURFACE_EXTENSION_NAME;
#endif
#if GST_VULKAN_HAVE_WINDOW_WIN32
if (type & GST_VULKAN_DISPLAY_TYPE_WIN32)
return VK_KHR_WIN32_SURFACE_EXTENSION_NAME;
#endif
#if GST_VULKAN_HAVE_WINDOW_ANDROID
if (type & GST_VULKAN_DISPLAY_TYPE_ANDROID)
return VK_KHR_ANDROID_SURFACE_EXTENSION_NAME;
#endif
return NULL;
}
/**
* gst_vulkan_display_handle_context_query:
* @element: a #GstElement
* @query: a #GstQuery of type #GST_QUERY_CONTEXT
* @display: (nullable): the #GstVulkanDisplay
*
* If a #GstVulkanDisplay is requested in @query, sets @device as the reply.
*
* Intended for use with element query handlers to respond to #GST_QUERY_CONTEXT
* for a #GstVulkanDisplay.
*
* Returns: whether @query was responded to with @display
*
* Since: 1.18
*/
gboolean
gst_vulkan_display_handle_context_query (GstElement * element, GstQuery * query,
GstVulkanDisplay * display)
{
gboolean res = FALSE;
const gchar *context_type;
GstContext *context, *old_context;
g_return_val_if_fail (element != NULL, FALSE);
g_return_val_if_fail (query != NULL, FALSE);
g_return_val_if_fail (GST_QUERY_TYPE (query) == GST_QUERY_CONTEXT, FALSE);
if (!display)
return FALSE;
gst_query_parse_context_type (query, &context_type);
if (g_strcmp0 (context_type, GST_VULKAN_DISPLAY_CONTEXT_TYPE_STR) == 0) {
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new (GST_VULKAN_DISPLAY_CONTEXT_TYPE_STR, TRUE);
gst_context_set_vulkan_display (context, display);
gst_query_set_context (query, context);
gst_context_unref (context);
res = display != NULL;
}
return res;
}
/**
* gst_vulkan_display_run_context_query:
* @element: a #GstElement
* @display: (inout): a #GstVulkanDisplay
*
* Attempt to retrieve a #GstVulkanDisplay using #GST_QUERY_CONTEXT from the
* surrounding elements of @element.
*
* Returns: whether @display contains a valid #GstVulkanDisplay
*
* Since: 1.18
*/
gboolean
gst_vulkan_display_run_context_query (GstElement * element,
GstVulkanDisplay ** display)
{
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
g_return_val_if_fail (display != NULL, FALSE);
_init_debug ();
if (*display && GST_IS_VULKAN_DISPLAY (*display))
return TRUE;
gst_vulkan_global_context_query (element,
GST_VULKAN_DISPLAY_CONTEXT_TYPE_STR);
GST_DEBUG_OBJECT (element, "found display %p", *display);
if (*display)
return TRUE;
return FALSE;
}