gstreamer/ext/wpe/WPEThreadedView.h
Philippe Normand 8ef30a9ce5 wpe: Move webview load waiting to WPEView
As waiting for the load to be finished is specific to the WebView, it should be
done from our WPEView, not from the WPEContextThread. This fixes issues where
multiple wpesrc elements are created in sequence. Without this patch the first
view might receive erroneous buffer notifications.

Fixes #1386

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1568>
2020-09-21 16:39:57 +00:00

153 lines
4.1 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 WPEView {
public:
WPEView(WebKitWebContext*, GstWpeSrc*, GstGLContext*, GstGLDisplay*, int width, int height);
~WPEView();
bool operator!() const { return m_isValid; }
/* Used by wpesrc */
void resize(int width, int height);
void loadUri(const gchar*);
void loadData(GBytes*);
void setDrawBackground(gboolean);
GstEGLImage* image();
GstBuffer* buffer();
void dispatchKeyboardEvent(struct wpe_input_keyboard_event&);
void dispatchPointerEvent(struct wpe_input_pointer_event&);
void dispatchAxisEvent(struct wpe_input_axis_event&);
/* Used by WPEContextThread */
bool hasUri() const { return webkit.uri; }
void disconnectLoadFailedSignal();
void waitLoadCompletion();
protected:
void handleExportedImage(gpointer);
#if ENABLE_SHM_BUFFER_SUPPORT
void handleExportedBuffer(struct wpe_fdo_shm_exported_buffer*);
#endif
private:
struct wpe_view_backend* backend() const;
void frameComplete();
void loadUriUnlocked(const gchar*);
void notifyLoadFinished();
void releaseImage(gpointer);
#if ENABLE_SHM_BUFFER_SUPPORT
void releaseSHMBuffer(gpointer);
static void s_releaseSHMBuffer(gpointer);
#endif
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 };
bool m_isValid { false };
struct {
GMutex ready_mutex;
GCond ready_cond;
gboolean ready;
} threading;
// 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 };
};
class WPEContextThread {
public:
static WPEContextThread& singleton();
WPEContextThread();
~WPEContextThread();
WPEView* createWPEView(GstWpeSrc*, GstGLContext*, GstGLDisplay*, int width, int height);
template<typename Function>
void dispatch(Function);
private:
static gpointer s_viewThread(gpointer);
struct {
GMutex mutex;
GCond cond;
GThread* thread { nullptr };
} threading;
struct {
GMainContext* context;
GMainLoop* loop;
WebKitWebContext* web_context;
} glib { nullptr, nullptr, nullptr };
};