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1e7c4db5a7
Add initial support for EGL to libgstvaapi core library. The target display server and the desired OpenGL API can be programmatically selected at run-time. A comprehensive set of EGL utilities are provided to support those dynamic selection needs, but also most importantly to ensure that the GL command stream is executed from within a single thread. https://bugzilla.gnome.org/show_bug.cgi?id=743846
238 lines
6.1 KiB
C
238 lines
6.1 KiB
C
/*
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* gstvaapiutils_egl.h - EGL utilities
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*
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* Copyright (C) 2014 Intel Corporation
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* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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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
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301
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*/
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#ifndef GST_VAAPI_UTILS_EGL_H
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#define GST_VAAPI_UTILS_EGL_H
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#include <gmodule.h>
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#include <gst/gstinfo.h>
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#include <gst/video/video-format.h>
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#include "egl_compat.h"
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#include "gstvaapiminiobject.h"
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GST_DEBUG_CATEGORY_EXTERN (gst_debug_vaapidisplay_egl);
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#define GST_CAT_DEFAULT gst_debug_vaapidisplay_egl
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typedef union egl_handle_s EglHandle;
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typedef struct egl_object_s EglObject;
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typedef struct egl_object_class_s EglObjectClass;
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typedef struct egl_vtable_s EglVTable;
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typedef struct egl_display_s EglDisplay;
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typedef struct egl_config_s EglConfig;
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typedef struct egl_context_state_s EglContextState;
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typedef struct egl_context_s EglContext;
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typedef struct egl_surface_s EglSurface;
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typedef struct egl_program_s EglProgram;
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#define EGL_PROTO_BEGIN(NAME, TYPE, EXTENSION) \
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typedef TYPE (*GL_PROTO_GEN_CONCAT3(Egl,NAME,Proc))
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#define EGL_PROTO_END() ;
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#define GL_PROTO_BEGIN(NAME, TYPE, EXTENSION) \
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typedef TYPE (*GL_PROTO_GEN_CONCAT3(Gl,NAME,Proc))
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#define GL_PROTO_ARG_LIST(...) (__VA_ARGS__)
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#define GL_PROTO_ARG(NAME, TYPE) TYPE NAME
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#define GL_PROTO_END() ;
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#include "egl_vtable.h"
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union egl_handle_s
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{
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gpointer p;
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guintptr u;
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gintptr i;
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};
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struct egl_object_s
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{
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/*< private >*/
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GstVaapiMiniObject parent_instance;
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EglHandle handle;
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guint is_wrapped:1;
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guint is_valid:1;
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};
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struct egl_object_class_s
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{
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/*< private >*/
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GstVaapiMiniObjectClass parent_class;
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};
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struct egl_vtable_s
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{
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EglObject base;
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gchar **egl_extensions;
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guint num_egl_symbols;
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gchar **gl_extensions;
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guint num_gl_symbols;
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guint gles_version;
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#define EGL_PROTO_BEGIN(NAME, TYPE, EXTENSION) \
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GL_PROTO_BEGIN_I(NAME, TYPE, EXTENSION, Egl, egl)
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#define GL_PROTO_BEGIN(NAME, TYPE, EXTENSION) \
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GL_PROTO_BEGIN_I(NAME, TYPE, EXTENSION, Gl, gl)
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#define GL_PROTO_BEGIN_I(NAME, TYPE, EXTENSION, Prefix, prefix) \
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GL_PROTO_GEN_CONCAT3(Prefix,NAME,Proc) GL_PROTO_GEN_CONCAT(prefix,NAME);
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#include "egl_vtable.h"
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#define EGL_DEFINE_EXTENSION(EXTENSION) \
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GL_DEFINE_EXTENSION_I(EXTENSION, EGL)
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#define GL_DEFINE_EXTENSION(EXTENSION) \
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GL_DEFINE_EXTENSION_I(EXTENSION, GL)
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#define GL_DEFINE_EXTENSION_I(EXTENSION, PREFIX) \
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guint GL_PROTO_GEN_CONCAT4(has_,PREFIX,_,EXTENSION);
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#include "egl_vtable.h"
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};
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struct egl_display_s
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{
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EglObject base;
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gchar *gl_vendor_string;
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gchar *gl_version_string;
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gchar *gl_apis_string;
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guint gl_apis; /* EGL_*_BIT mask */
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GMutex mutex;
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GThread *gl_thread;
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GCond gl_thread_ready;
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volatile gboolean gl_thread_cancel;
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GAsyncQueue *gl_queue;
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};
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struct egl_config_s
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{
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EglObject base;
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EglDisplay *display;
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guint gl_api; /* EGL_*_API value */
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guint gles_version;
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gint config_id;
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gint visual_id;
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};
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typedef void (*EglContextRunFunc) (gpointer args);
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struct egl_context_state_s
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{
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EGLDisplay display;
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EGLContext context;
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EGLSurface read_surface;
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EGLSurface draw_surface;
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};
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struct egl_context_s
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{
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EglObject base;
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EglVTable *vtable;
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EglDisplay *display;
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EglConfig *config;
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EglSurface *read_surface;
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EglSurface *draw_surface;
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};
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struct egl_surface_s
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{
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EglObject base;
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EglDisplay *display;
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};
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/* Defined to the maximum number of uniforms for a shader program */
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#define EGL_MAX_UNIFORMS 16
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struct egl_program_s
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{
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EglObject base;
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EglVTable *vtable;
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guint frag_shader;
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guint vert_shader;
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gint uniforms[EGL_MAX_UNIFORMS];
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};
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#define egl_object_ref(obj) \
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((gpointer)gst_vaapi_mini_object_ref ((GstVaapiMiniObject *)(obj)))
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#define egl_object_unref(obj) \
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gst_vaapi_mini_object_unref ((GstVaapiMiniObject *)(obj))
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#define egl_object_replace(old_obj_ptr, new_obj) \
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gst_vaapi_mini_object_replace ((GstVaapiMiniObject **)(old_obj_ptr), \
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(GstVaapiMiniObject *)(new_obj))
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G_GNUC_INTERNAL
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EglDisplay *
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egl_display_new (gpointer native_display);
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G_GNUC_INTERNAL
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EglDisplay *
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egl_display_new_wrapped (EGLDisplay gl_display);
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G_GNUC_INTERNAL
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EglConfig *
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egl_config_new (EglDisplay * display, guint gles_version,
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GstVideoFormat format);
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G_GNUC_INTERNAL
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EglConfig *
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egl_config_new_with_attribs (EglDisplay * display, const EGLint * attribs);
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G_GNUC_INTERNAL
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EglContext *
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egl_context_new (EglDisplay * display, EglConfig * config, EglContext * parent);
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G_GNUC_INTERNAL
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EglContext *
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egl_context_new_wrapped (EglDisplay * display, EGLContext gl_context);
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G_GNUC_INTERNAL
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EglVTable *
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egl_context_get_vtable (EglContext * ctx, gboolean need_gl_symbols);
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G_GNUC_INTERNAL
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gboolean
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egl_context_set_current (EglContext * ctx, gboolean activate,
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EglContextState * old_cs);
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G_GNUC_INTERNAL
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gboolean
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egl_context_run (EglContext * ctx, EglContextRunFunc func, gpointer args);
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G_GNUC_INTERNAL
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EglProgram *
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egl_program_new (EglContext * ctx, const gchar * frag_shader_text,
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const gchar * vert_shader_text);
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G_GNUC_INTERNAL
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guint
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egl_create_texture (EglContext * ctx, guint target, guint format,
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guint width, guint height);
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G_GNUC_INTERNAL
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void
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egl_destroy_texture (EglContext * ctx, guint texture);
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G_GNUC_INTERNAL
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void
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egl_matrix_set_identity (gfloat m[16]);
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#endif /* GST_VAAPI_UTILS_EGL_H */
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