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wpe: Emit load-progress messages

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The estimated-load-progress value can be used on application side to display a
progress bar for instance.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1710>
This commit is contained in:
Philippe Normand 2020-10-19 14:56:43 +01:00 committed by GStreamer Merge Bot
parent 82dcb27401
commit 3bcb876c29
2 changed files with 24 additions and 0 deletions
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15
ext/wpe/WPEThreadedView.cpp
View file

@ -205,6 +205,20 @@ static gboolean s_loadFailedWithTLSErrors(WebKitWebView*, gchar* failing_uri, G
return FALSE;
}
static void s_loadProgressChaned(GObject* object, GParamSpec*, gpointer data)
{
GstElement* src = GST_ELEMENT_CAST (data);
// The src element is locked already so we can't call
// gst_element_post_message(). Instead retrieve the bus manually and use it
// directly.
GstBus* bus = GST_ELEMENT_BUS (src);
double estimatedProgress;
g_object_get(object, "estimated-load-progress", &estimatedProgress, nullptr);
gst_object_ref (bus);
gst_bus_post (bus, gst_message_new_element(GST_OBJECT_CAST(src), gst_structure_new("wpe-stats", "estimated-load-progress", G_TYPE_DOUBLE, estimatedProgress * 100, nullptr)));
gst_object_unref (bus);
}
WPEView::WPEView(WebKitWebContext* web_context, GstWpeSrc* src, GstGLContext* context, GstGLDisplay* display, int width, int height)
{
g_mutex_init(&threading.ready_mutex);
@ -264,6 +278,7 @@ WPEView::WPEView(WebKitWebContext* web_context, GstWpeSrc* src, GstGLContext* co
g_signal_connect(webkit.view, "load-failed", G_CALLBACK(s_loadFailed), src);
g_signal_connect(webkit.view, "load-failed-with-tls-errors", G_CALLBACK(s_loadFailedWithTLSErrors), src);
g_signal_connect(webkit.view, "notify::estimated-load-progress", G_CALLBACK(s_loadProgressChaned), src);
gst_wpe_src_configure_web_view(src, webkit.view);

9
ext/wpe/gstwpesrc.cpp
View file

@ -30,6 +30,15 @@
* variable and make sure `video/x-raw, format=BGRA` caps are negotiated by the
* wpesrc element.
*
* As the webview loading is usually not instantaneous, the wpesrc element emits
* messages indicating the load progress, in percent. The value is an estimate
* based on the total number of bytes expected to be received for a document,
* including all its possible subresources and child documents. The application
* can handle these `element` messages synchronously for instance, in order to
* display a progress bar or other visual load indicator. The load percent value
* is stored in the message structure as a double value named
* `estimated-load-progress` and the structure name is `wpe-stats`.
*
* ## Example launch lines
*
* ```shell