gstreamer/ext/wpe/WPEThreadedView.h
Philippe Normand 991bcb22d5 wpe: Add support for SHM without requiring EGLDisplay
The previous version of the SHM export support still required a valid
EGLDisplay. The upcoming WPEBackend-FDO 1.8.x aims to remove this requirement,
hence allowing wpesrc to be used without GPU.
2020-04-13 11:53:16 +00:00

124 lines
3.4 KiB
C++

/* Copyright (C) <2018> Philippe Normand <philn@igalia.com>
* Copyright (C) <2018> Žan Doberšek <zdobersek@igalia.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.
*/
#pragma once
#include <EGL/egl.h>
#include <glib.h>
#include <gst/gl/gstglfuncs.h>
#include <wpe/fdo.h>
#include <wpe/fdo-egl.h>
#include <wpe/webkit.h>
#include "gstwpesrc.h"
typedef struct _GstGLContext GstGLContext;
typedef struct _GstGLDisplay GstGLDisplay;
typedef struct _GstEGLImage GstEGLImage;
#if defined(WPE_FDO_CHECK_VERSION) && WPE_FDO_CHECK_VERSION(1, 7, 0)
#define ENABLE_SHM_BUFFER_SUPPORT 1
#else
#define ENABLE_SHM_BUFFER_SUPPORT 0
#endif
class WPEThreadedView {
public:
WPEThreadedView();
~WPEThreadedView();
bool initialize(GstWpeSrc*, GstGLContext*, GstGLDisplay*, int width, int height);
void resize(int width, int height);
void loadUri(const gchar*);
void loadData(GBytes*);
void setDrawBackground(gboolean);
GstEGLImage* image();
GstBuffer* buffer();
struct wpe_view_backend* backend() const;
protected:
void handleExportedImage(gpointer);
#if ENABLE_SHM_BUFFER_SUPPORT
void handleExportedBuffer(struct wpe_fdo_shm_exported_buffer*);
#endif
private:
void frameComplete();
void loadUriUnlocked(const gchar*);
void releaseImage(gpointer);
#if ENABLE_SHM_BUFFER_SUPPORT
void releaseSHMBuffer(gpointer);
static void s_releaseSHMBuffer(gpointer);
#endif
static void s_loadEvent(WebKitWebView*, WebKitLoadEvent, gpointer);
static gpointer s_viewThread(gpointer);
struct {
GMutex mutex;
GCond cond;
GMutex ready_mutex;
GCond ready_cond;
GThread* thread { nullptr };
} threading;
struct {
GMainContext* context;
GMainLoop* loop;
} glib { nullptr, nullptr };
struct {
GstGLContext* context;
GstGLDisplay* display;
} gst { nullptr, nullptr };
static struct wpe_view_backend_exportable_fdo_egl_client s_exportableEGLClient;
#if ENABLE_SHM_BUFFER_SUPPORT
static struct wpe_view_backend_exportable_fdo_client s_exportableClient;
#endif
static void s_releaseImage(GstEGLImage*, gpointer);
struct {
struct wpe_view_backend_exportable_fdo* exportable;
int width;
int height;
} wpe { nullptr, 0, 0 };
struct {
gchar* uri;
WebKitWebView* view;
} webkit = { nullptr, nullptr };
// This mutex guards access to either egl or shm resources declared below,
// depending on the runtime behavior.
GMutex images_mutex;
struct {
GstEGLImage* pending;
GstEGLImage* committed;
} egl { nullptr, nullptr };
struct {
GstBuffer* pending;
GstBuffer* committed;
} shm { nullptr, nullptr };
};