gstreamer/ext/wpe/gstwpesrc.cpp
Philippe Normand 5b8935bc77 wpe: Add a source element acting as a Web Browser based on WebKit WPE
The wpe element is used to produce a video texture representing a web page
rendered off-screen by WPE. This element can be used to overlay HTML on top of
another video stream for instance.
2018-12-06 12:38:52 +00:00

798 lines
24 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.
*/
/**
* SECTION:element-wpesrc
* @title: wpesrc
*
* The wpesrc element is used to produce a video texture representing a web page
* rendered off-screen by WPE.
*
* ## Example launch line
*
* |[
* gst-launch-1.0 -v wpesrc location="https://gstreamer.freedesktop.org" ! queue ! glimagesink
* ]|
* Shows the GStreamer website homepage
*
* |[
* gst-play-1.0 --videosink gtkglsink wpe://https://gstreamer.freedesktop.org
* ]|
* Shows the GStreamer website homepage as played with GstPlayer in a GTK+ window.
*
* |[
* gst-launch-1.0 glvideomixer name=m sink_1::zorder=0 ! glimagesink wpesrc location="file:///home/phil/Downloads/plunk/index.html" draw-background=0 ! m. videotestsrc ! queue ! glupload ! glcolorconvert ! m.
* ]|
* Composite WPE with a video stream in a single OpenGL scene.
*
* |[
* gst-launch-1.0 glvideomixer name=m sink_1::zorder=0 sink_0::height=818 sink_0::width=1920 ! gtkglsink wpesrc location="file:///home/phil/Downloads/plunk/index.html" draw-background=0 ! m. uridecodebin uri="http://192.168.1.44/Sintel.2010.1080p.mkv" name=d d. ! queue ! glupload ! glcolorconvert ! m.
* ]|
* Composite WPE with a video stream, sink_0 pad properties have to match the video dimensions.
*/
/*
* TODO:
* - Audio support (requires an AudioSession implementation in WebKit and a WPEBackend-fdo API for it)
* - DMABuf support (requires changes in WPEBackend-fdo to expose DMABuf planes and fds)
* - Custom EGLMemory allocator
* - Better navigation events handling (would require a new GstNavigation API)
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "gstwpesrc.h"
#include <gst/video/video.h>
#include <gst/gl/gl.h>
#include <gst/gl/egl/gstglmemoryegl.h>
#include <gst/gl/wayland/gstgldisplay_wayland.h>
#include <xkbcommon/xkbcommon.h>
#include "WPEThreadedView.h"
GST_DEBUG_CATEGORY (wpe_src_debug);
#define GST_CAT_DEFAULT wpe_src_debug
#define DEFAULT_WIDTH 1920
#define DEFAULT_HEIGHT 1080
#define DEFAULT_FPS_N 30
#define DEFAULT_FPS_D 1
#define SUPPORTED_GL_APIS static_cast<GstGLAPI>(GST_GL_API_OPENGL | GST_GL_API_OPENGL3 | GST_GL_API_GLES2)
enum
{
PROP_0,
PROP_LOCATION,
PROP_DRAW_BACKGROUND
};
enum
{
SIGNAL_CONFIGURE_WEB_VIEW,
LAST_SIGNAL
};
static guint gst_wpe_src_signals[LAST_SIGNAL] = { 0 };
struct _GstWpeSrc
{
GstPushSrc parent;
GstGLDisplay *display;
GstGLContext *context, *other_context;
GstVideoInfo out_info;
GstCaps *out_caps;
GstGLMemoryAllocator *allocator;
GstGLVideoAllocationParams *gl_alloc_params;
guint64 n_frames;
gchar *location;
gboolean draw_background;
gboolean negotiated;
WPEThreadedView *view;
};
static void gst_wpe_src_uri_handler_init (gpointer iface, gpointer data);
#define gst_wpe_src_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstWpeSrc, gst_wpe_src, GST_TYPE_PUSH_SRC,
G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_wpe_src_uri_handler_init));
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw(memory:GLMemory), "
"format = (string) RGBA, "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE ", "
"framerate = " GST_VIDEO_FPS_RANGE ", "
"pixel-aspect-ratio = (fraction)1/1")
);
static GstFlowReturn
gst_wpe_src_create (GstPushSrc * psrc, GstBuffer ** buffer)
{
GstWpeSrc *src = GST_WPE_SRC (psrc);
GstGLSyncMeta *sync_meta;
GstEGLImage *img = src->view->image ();
GstGLVideoAllocationParams *alloc_params = src->gl_alloc_params;
GstGLFormat formats[1] { GST_GL_RGBA };
gpointer imgs[1] { NULL };
if (G_UNLIKELY (!src->negotiated || !src->context))
goto not_negotiated;
g_return_val_if_fail(img != NULL, GST_FLOW_ERROR);
*buffer = gst_buffer_new ();
imgs[0] = (gpointer) img;
alloc_params->parent.gl_handle = img;
alloc_params->plane = 0;
gst_gl_memory_setup_buffer (src->allocator, *buffer, alloc_params, formats, imgs, 1);
sync_meta = gst_buffer_get_gl_sync_meta (*buffer);
if (sync_meta)
gst_gl_sync_meta_set_sync_point (sync_meta, src->context);
GST_BUFFER_OFFSET (*buffer) = src->n_frames;
src->n_frames++;
GST_BUFFER_OFFSET_END (*buffer) = src->n_frames;
return GST_FLOW_OK;
not_negotiated:
{
GST_ELEMENT_ERROR (src, CORE, NEGOTIATION, (NULL),
("format wasn't negotiated before get function"));
return GST_FLOW_NOT_NEGOTIATED;
}
}
static gboolean
gst_wpe_src_start (GstBaseSrc * base_src)
{
GstWpeSrc *src = GST_WPE_SRC (base_src);
GST_INFO_OBJECT (src, "Starting up");
GST_OBJECT_LOCK (src);
src->n_frames = 0;
src->negotiated = FALSE;
src->allocator = GST_GL_MEMORY_ALLOCATOR (gst_allocator_find (GST_GL_MEMORY_EGL_ALLOCATOR_NAME));
src->gl_alloc_params = NULL;
src->view = new WPEThreadedView;
GST_OBJECT_UNLOCK (src);
return TRUE;
}
static gboolean
gst_wpe_src_stop (GstBaseSrc * base_src)
{
GstWpeSrc *src = GST_WPE_SRC (base_src);
GST_INFO_OBJECT (src, "Stopping");
GST_OBJECT_LOCK (src);
if (src->gl_alloc_params) {
gst_gl_allocation_params_free ((GstGLAllocationParams *)
src->gl_alloc_params);
src->gl_alloc_params = NULL;
}
gst_caps_replace (&src->out_caps, NULL);
if (src->context)
g_clear_object (&src->context);
delete src->view;
src->view = NULL;
if (src->allocator)
g_clear_object (&src->allocator);
GST_OBJECT_UNLOCK (src);
return TRUE;
}
static void
gst_wpe_src_get_times (GstBaseSrc * base_src, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end)
{
GstClockTime timestamp = GST_BUFFER_PTS (buffer);
GstClockTime duration = GST_BUFFER_DURATION (buffer);
*end = timestamp + duration;
*start = timestamp;
GST_LOG_OBJECT (base_src,
"Got times start: %" GST_TIME_FORMAT " end: %" GST_TIME_FORMAT,
GST_TIME_ARGS (*start), GST_TIME_ARGS (*end));
}
static gboolean
gst_wpe_src_query (GstBaseSrc * base_src, GstQuery * query)
{
gboolean res = FALSE;
GstWpeSrc *src = GST_WPE_SRC (base_src);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:
{
if (gst_gl_handle_context_query ((GstElement *) src, query,
src->display, src->context, src->other_context)) {
return TRUE;
}
break;
}
case GST_QUERY_CONVERT:
{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
res =
gst_video_info_convert (&src->out_info, src_fmt, src_val, dest_fmt,
&dest_val);
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
return res;
}
default:
res = GST_BASE_SRC_CLASS (parent_class)->query (base_src, query);
break;
}
return res;
}
static GstCaps *
gst_wpe_src_fixate (GstBaseSrc * base_src, GstCaps * caps)
{
GstStructure *structure;
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", DEFAULT_WIDTH);
gst_structure_fixate_field_nearest_int (structure, "height", DEFAULT_HEIGHT);
if (gst_structure_has_field (structure, "framerate"))
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
DEFAULT_FPS_N, DEFAULT_FPS_D);
else
gst_structure_set (structure, "framerate", GST_TYPE_FRACTION, DEFAULT_FPS_N,
DEFAULT_FPS_D, NULL);
caps = GST_BASE_SRC_CLASS (parent_class)->fixate (base_src, caps);
GST_INFO_OBJECT (base_src, "Fixated caps to %" GST_PTR_FORMAT, caps);
return caps;
}
static gboolean
gst_wpe_src_set_caps (GstBaseSrc * base_src, GstCaps * caps)
{
GstWpeSrc *src = GST_WPE_SRC (base_src);
GST_INFO_OBJECT (base_src, "Caps set to %" GST_PTR_FORMAT, caps);
if (!gst_video_info_from_caps (&src->out_info, caps))
goto wrong_caps;
if (src->view) {
src->view->resize (GST_VIDEO_INFO_WIDTH (&src->out_info),
GST_VIDEO_INFO_HEIGHT (&src->out_info));
}
src->negotiated = TRUE;
gst_caps_replace (&src->out_caps, caps);
return TRUE;
wrong_caps:
{
GST_WARNING ("wrong caps");
return FALSE;
}
}
static void
gst_wpe_src_set_context (GstElement * element, GstContext * context)
{
GstWpeSrc *src = GST_WPE_SRC (element);
gst_gl_handle_set_context (element, context, &src->display,
&src->other_context);
if (src->display)
gst_gl_display_filter_gl_api (src->display, SUPPORTED_GL_APIS);
GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
}
static gboolean
_find_local_gl_context (GstWpeSrc * src)
{
if (gst_gl_query_local_gl_context (GST_ELEMENT (src), GST_PAD_SRC,
&src->context))
return TRUE;
return FALSE;
}
static void
_src_initialize_wpe_view (GstGLContext * context, GstWpeSrc * src)
{
src->view->initialize (src, context, src->display,
GST_VIDEO_INFO_WIDTH (&src->out_info),
GST_VIDEO_INFO_HEIGHT (&src->out_info));
}
void
gst_wpe_src_configure_web_view (GstWpeSrc * src, WebKitWebView * webview)
{
GValue args[2] = { {0}, {0} };
g_value_init (&args[0], GST_TYPE_ELEMENT);
g_value_set_object (&args[0], src);
g_value_init (&args[1], G_TYPE_OBJECT);
g_value_set_object (&args[1], webview);
g_signal_emitv (args, gst_wpe_src_signals[SIGNAL_CONFIGURE_WEB_VIEW], 0,
NULL);
g_value_unset (&args[0]);
g_value_unset (&args[1]);
}
static gboolean
gst_wpe_src_decide_allocation (GstBaseSrc * basesrc, GstQuery * query)
{
GstWpeSrc *src = GST_WPE_SRC (basesrc);
GstBufferPool *pool = NULL;
GstStructure *config;
GstCaps *caps;
guint min, max, size;
gboolean update_pool;
GError *error = NULL;
GstAllocationParams *alloc_params = NULL;
guint plane = 1;
GstVideoAlignment *valign = NULL;
GstGLTextureTarget target = GST_GL_TEXTURE_TARGET_2D;
GstGLFormat tex_format = GST_GL_RGBA;
if (!gst_gl_ensure_element_data (src, &src->display, &src->other_context))
return FALSE;
gst_gl_display_filter_gl_api (src->display, SUPPORTED_GL_APIS);
_find_local_gl_context (src);
if (!src->context) {
GST_OBJECT_LOCK (src->display);
do {
if (src->context) {
gst_object_unref (src->context);
src->context = NULL;
}
src->context =
gst_gl_display_get_gl_context_for_thread (src->display, NULL);
if (!src->context) {
if (!gst_gl_display_create_context (src->display, src->other_context,
&src->context, &error)) {
GST_OBJECT_UNLOCK (src->display);
goto context_error;
}
}
} while (!gst_gl_display_add_context (src->display, src->context));
GST_OBJECT_UNLOCK (src->display);
}
if ((gst_gl_context_get_gl_api (src->context) & SUPPORTED_GL_APIS) == 0)
goto unsupported_gl_api;
gst_gl_context_thread_add (src->context,
(GstGLContextThreadFunc) _src_initialize_wpe_view, src);
gst_query_parse_allocation (query, &caps, NULL);
if (gst_query_get_n_allocation_pools (query) > 0) {
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
update_pool = TRUE;
} else {
GstVideoInfo vinfo;
gst_video_info_init (&vinfo);
gst_video_info_from_caps (&vinfo, caps);
size = vinfo.size;
min = max = 1;
update_pool = FALSE;
}
if (!pool || !GST_IS_GL_BUFFER_POOL (pool)) {
/* can't use this pool */
if (pool)
gst_object_unref (pool);
pool = gst_gl_buffer_pool_new (src->context);
}
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, min, max);
gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
if (gst_query_find_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, NULL))
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_GL_SYNC_META);
gst_buffer_pool_set_config (pool, config);
src->gl_alloc_params = gst_gl_video_allocation_params_new_wrapped_gl_handle
(src->context,
alloc_params,
&src->out_info, plane, valign, target, tex_format, NULL, NULL, NULL);
if (update_pool)
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
else
gst_query_add_allocation_pool (query, pool, size, min, max);
gst_object_unref (pool);
return TRUE;
unsupported_gl_api:
{
GstGLAPI gl_api = gst_gl_context_get_gl_api (src->context);
gchar *gl_api_str = gst_gl_api_to_string (gl_api);
gchar *supported_gl_api_str = gst_gl_api_to_string (SUPPORTED_GL_APIS);
GST_ELEMENT_ERROR (src, RESOURCE, BUSY,
("GL API's not compatible context: %s supported: %s", gl_api_str,
supported_gl_api_str), (NULL));
g_free (supported_gl_api_str);
g_free (gl_api_str);
return FALSE;
}
context_error:
{
if (error) {
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, ("%s", error->message),
(NULL));
g_clear_error (&error);
} else {
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL), (NULL));
}
if (src->context)
gst_object_unref (src->context);
src->context = NULL;
return FALSE;
}
}
static GstStateChangeReturn
gst_wpe_src_change_state (GstElement * element, GstStateChange transition)
{
GstWpeSrc *src = GST_WPE_SRC (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GST_DEBUG_OBJECT (src, "changing state: %s => %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
if (src->display != NULL && !GST_IS_GL_DISPLAY_WAYLAND (src->display)) {
GST_ERROR_OBJECT (src,
"wpesrc currently only supports Wayland GstGLDisplays %"
GST_PTR_FORMAT, src->display);
ret = GST_STATE_CHANGE_FAILURE;
}
break;
case GST_STATE_CHANGE_READY_TO_NULL:
if (src->other_context)
g_clear_object (&src->other_context);
if (src->display)
g_clear_object (&src->display);
break;
default:
break;
}
return ret;
}
static gboolean
gst_wpe_src_set_location (GstWpeSrc * src, const gchar * location,
GError ** error)
{
g_free (src->location);
src->location = g_strdup (location);
if (src->view)
src->view->loadUri (src->location);
return TRUE;
}
static void
gst_wpe_src_set_draw_background (GstWpeSrc * src, gboolean draw_background)
{
if (src->view)
src->view->setDrawBackground (draw_background);
src->draw_background = draw_background;
}
static void
gst_wpe_src_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstWpeSrc *src = GST_WPE_SRC (object);
switch (prop_id) {
case PROP_LOCATION:
{
const gchar *location;
location = g_value_get_string (value);
if (location == NULL) {
GST_WARNING_OBJECT (src, "location property cannot be NULL");
return;
}
if (!gst_wpe_src_set_location (src, location, NULL)) {
GST_WARNING_OBJECT (src, "badly formatted location");
return;
}
break;
}
case PROP_DRAW_BACKGROUND:
gst_wpe_src_set_draw_background (src, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_wpe_src_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstWpeSrc *src = GST_WPE_SRC (object);
switch (prop_id) {
case PROP_LOCATION:
g_value_set_string (value, src->location);
break;
case PROP_DRAW_BACKGROUND:
g_value_set_boolean (value, src->draw_background);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_wpe_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean ret = FALSE;
GstWpeSrc *src = GST_WPE_SRC (parent);
if (GST_EVENT_TYPE (event) == GST_EVENT_NAVIGATION) {
const gchar *key;
gint button;
gdouble x, y;
GST_DEBUG_OBJECT (src, "Processing event %" GST_PTR_FORMAT, event);
switch (gst_navigation_event_get_type (event)) {
case GST_NAVIGATION_EVENT_KEY_PRESS:
case GST_NAVIGATION_EVENT_KEY_RELEASE:
if (gst_navigation_event_parse_key_event (event, &key)) {
/* FIXME: This is wrong... The GstNavigation API should pass
hardware-level informations, not high-level keysym strings */
uint32_t keysym =
(uint32_t) xkb_keysym_from_name (key, XKB_KEYSYM_NO_FLAGS);
struct wpe_input_keyboard_event wpe_event;
wpe_event.key_code = keysym;
wpe_event.pressed =
gst_navigation_event_get_type (event) ==
GST_NAVIGATION_EVENT_KEY_PRESS;
wpe_view_backend_dispatch_keyboard_event (src->view->backend (),
&wpe_event);
ret = TRUE;
}
break;
case GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS:
case GST_NAVIGATION_EVENT_MOUSE_BUTTON_RELEASE:
if (gst_navigation_event_parse_mouse_button_event (event, &button, &x,
&y)) {
struct wpe_input_pointer_event wpe_event;
wpe_event.type = wpe_input_pointer_event_type_button;
wpe_event.x = (int) x;
wpe_event.y = (int) y;
if (button == 1) {
wpe_event.modifiers = wpe_input_pointer_modifier_button1;
} else if (button == 2) {
wpe_event.modifiers = wpe_input_pointer_modifier_button2;
} else if (button == 3) {
wpe_event.modifiers = wpe_input_pointer_modifier_button3;
} else if (button == 4) {
wpe_event.modifiers = wpe_input_pointer_modifier_button4;
} else if (button == 5) {
wpe_event.modifiers = wpe_input_pointer_modifier_button5;
}
wpe_event.button = button;
wpe_event.state = 1;
wpe_event.state =
gst_navigation_event_get_type (event) ==
GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS;
wpe_view_backend_dispatch_pointer_event (src->view->backend (),
&wpe_event);
ret = TRUE;
}
break;
case GST_NAVIGATION_EVENT_MOUSE_MOVE:
if (gst_navigation_event_parse_mouse_move_event (event, &x, &y)) {
struct wpe_input_pointer_event wpe_event;
wpe_event.type = wpe_input_pointer_event_type_motion;
wpe_event.x = (int) x;
wpe_event.y = (int) y;
wpe_view_backend_dispatch_pointer_event (src->view->backend (),
&wpe_event);
ret = TRUE;
}
break;
default:
break;
}
/* FIXME: No touch events handling support in GstNavigation */
}
if (!ret) {
ret = gst_pad_event_default (pad, parent, event);
}
return ret;
}
static void
gst_wpe_src_init (GstWpeSrc * src)
{
GstBaseSrc *base_src = GST_BASE_SRC (src);
GstPad *pad = gst_element_get_static_pad (GST_ELEMENT_CAST (src), "src");
gst_pad_set_event_function (pad, gst_wpe_src_event);
gst_object_unref (pad);
src->n_frames = 0;
src->draw_background = TRUE;
gst_base_src_set_format (base_src, GST_FORMAT_TIME);
gst_base_src_set_live (base_src, TRUE);
gst_base_src_set_do_timestamp (base_src, TRUE);
}
static GstURIType
gst_wpe_src_uri_get_type (GType)
{
return GST_URI_SRC;
}
static const gchar *const *
gst_wpe_src_get_protocols (GType)
{
static const char *protocols[] = { "wpe", NULL };
return protocols;
}
static gchar *
gst_wpe_src_get_uri (GstURIHandler * handler)
{
GstWpeSrc *src = GST_WPE_SRC (handler);
return g_strdup_printf ("wpe://%s", src->location);
}
static gboolean
gst_wpe_src_set_uri (GstURIHandler * handler, const gchar * uri,
GError ** error)
{
GstWpeSrc *src = GST_WPE_SRC (handler);
return gst_wpe_src_set_location (src, uri + 6, error);
}
static void
gst_wpe_src_uri_handler_init (gpointer iface_ptr, gpointer data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) iface_ptr;
iface->get_type = gst_wpe_src_uri_get_type;
iface->get_protocols = gst_wpe_src_get_protocols;
iface->get_uri = gst_wpe_src_get_uri;
iface->set_uri = gst_wpe_src_set_uri;
}
static void
gst_wpe_src_class_init (GstWpeSrcClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GstPushSrcClass *push_src_class = GST_PUSH_SRC_CLASS (klass);
GstBaseSrcClass *base_src_class = GST_BASE_SRC_CLASS (klass);
gobject_class->set_property = gst_wpe_src_set_property;
gobject_class->get_property = gst_wpe_src_get_property;
g_object_class_install_property (gobject_class, PROP_LOCATION,
g_param_spec_string ("location", "location",
"The URL to display",
"", (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_DRAW_BACKGROUND,
g_param_spec_boolean ("draw-background", "Draws the background",
"Whether to draw the WebView background", TRUE,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
gst_element_class_set_static_metadata (gstelement_class,
"WPE source", "Source/Video",
"Creates a video stream from a WPE browser",
"Philippe Normand <philn@igalia.com>, Žan Doberšek <zdobersek@igalia.com>");
gst_element_class_add_static_pad_template (gstelement_class, &src_factory);
gstelement_class->set_context = GST_DEBUG_FUNCPTR (gst_wpe_src_set_context);
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_wpe_src_change_state);
base_src_class->fixate = GST_DEBUG_FUNCPTR (gst_wpe_src_fixate);
base_src_class->set_caps = GST_DEBUG_FUNCPTR (gst_wpe_src_set_caps);
base_src_class->start = GST_DEBUG_FUNCPTR (gst_wpe_src_start);
base_src_class->stop = GST_DEBUG_FUNCPTR (gst_wpe_src_stop);
base_src_class->get_times = GST_DEBUG_FUNCPTR (gst_wpe_src_get_times);
base_src_class->query = GST_DEBUG_FUNCPTR (gst_wpe_src_query);
base_src_class->decide_allocation =
GST_DEBUG_FUNCPTR (gst_wpe_src_decide_allocation);
push_src_class->create = GST_DEBUG_FUNCPTR (gst_wpe_src_create);
/**
* GstWpeSrc::configure-web-view:
* @src: the object which received the signal
* @webview: the webView
*
* Allow application to configure the webView settings.
*/
gst_wpe_src_signals[SIGNAL_CONFIGURE_WEB_VIEW] =
g_signal_new ("configure-web-view", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
G_TYPE_NONE, 1, G_TYPE_OBJECT);
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (wpe_src_debug, "wpesrc", 0, "WPE Source");
return gst_element_register (plugin, "wpesrc", GST_RANK_NONE,
GST_TYPE_WPE_SRC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR,
wpe, "WPE src plugin", plugin_init, VERSION, GST_LICENSE, PACKAGE,
GST_PACKAGE_ORIGIN)