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/*
* Copyright (C) 2010 Igalia S.L
*
* 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; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "GStreamerGWorld.h"
#if USE(GSTREAMER)
#include "GOwnPtrGStreamer.h"
#include <gst/gst.h>
#include <gst/interfaces/xoverlay.h>
#include <gst/pbutils/pbutils.h>
#if PLATFORM(GTK)
#include <gtk/gtk.h>
#ifdef GDK_WINDOWING_X11
#include <gdk/gdkx.h> // for GDK_WINDOW_XID
#endif
#endif
using namespace std;
namespace WebCore {
gboolean gstGWorldSyncMessageCallback(GstBus* bus, GstMessage* message, gpointer data)
{
ASSERT(GST_MESSAGE_TYPE(message) == GST_MESSAGE_ELEMENT);
GStreamerGWorld* gstGWorld = static_cast<GStreamerGWorld*>(data);
if (gst_structure_has_name(message->structure, "prepare-xwindow-id")
|| gst_structure_has_name(message->structure, "have-ns-view"))
gstGWorld->setWindowOverlay(message);
return TRUE;
}
PassRefPtr<GStreamerGWorld> GStreamerGWorld::createGWorld(GstElement* pipeline)
{
return adoptRef(new GStreamerGWorld(pipeline));
}
GStreamerGWorld::GStreamerGWorld(GstElement* pipeline)
: m_pipeline(pipeline)
, m_dynamicPadName(0)
{
// XOverlay messages need to be handled synchronously.
GstBus* bus = gst_pipeline_get_bus(GST_PIPELINE(m_pipeline));
gst_bus_set_sync_handler(bus, gst_bus_sync_signal_handler, this);
g_signal_connect(bus, "sync-message::element", G_CALLBACK(gstGWorldSyncMessageCallback), this);
gst_object_unref(bus);
}
GStreamerGWorld::~GStreamerGWorld()
{
exitFullscreen();
m_pipeline = 0;
}
bool GStreamerGWorld::enterFullscreen()
{
if (m_dynamicPadName)
return false;
if (!m_videoWindow)
m_videoWindow = PlatformVideoWindow::createWindow();
GstElement* platformVideoSink = gst_element_factory_make("autovideosink", "platformVideoSink");
GstElement* colorspace = gst_element_factory_make("ffmpegcolorspace", "colorspace");
GstElement* queue = gst_element_factory_make("queue", "queue");
GstElement* videoScale = gst_element_factory_make("videoscale", "videoScale");
// Get video sink bin and the tee inside.
GOwnPtr<GstElement> videoSink;
g_object_get(m_pipeline, "video-sink", &videoSink.outPtr(), NULL);
GstElement* tee = gst_bin_get_by_name(GST_BIN(videoSink.get()), "videoTee");
GstElement* valve = gst_bin_get_by_name(GST_BIN(videoSink.get()), "videoValve");
g_object_set(valve, "drop-probability", 1.0, NULL);
// Add and link a queue, ffmpegcolorspace, videoscale and sink in the bin.
gst_bin_add_many(GST_BIN(videoSink.get()), platformVideoSink, videoScale, colorspace, queue, NULL);
#if GST_CHECK_VERSION(0, 10, 30)
// Faster elements linking, if possible.
gst_element_link_pads_full(queue, "src", colorspace, "sink", GST_PAD_LINK_CHECK_NOTHING);
gst_element_link_pads_full(colorspace, "src", videoScale, "sink", GST_PAD_LINK_CHECK_NOTHING);
gst_element_link_pads_full(videoScale, "src", platformVideoSink, "sink", GST_PAD_LINK_CHECK_NOTHING);
#else
gst_element_link_many(queue, colorspace, videoScale, platformVideoSink, NULL);
#endif
// Link a new src pad from tee to queue.
GstPad* srcPad = gst_element_get_request_pad(tee, "src%d");
GstPad* sinkPad = gst_element_get_static_pad(queue, "sink");
gst_pad_link(srcPad, sinkPad);
gst_object_unref(GST_OBJECT(sinkPad));
m_dynamicPadName = gst_pad_get_name(srcPad);
// Roll new elements to pipeline state.
gst_element_sync_state_with_parent(queue);
gst_element_sync_state_with_parent(colorspace);
gst_element_sync_state_with_parent(videoScale);
gst_element_sync_state_with_parent(platformVideoSink);
gst_object_unref(tee);
// Query the current media segment informations and send them towards
// the new tee branch downstream.
GstQuery* query = gst_query_new_segment(GST_FORMAT_TIME);
gboolean queryResult = gst_element_query(m_pipeline, query);
#if GST_CHECK_VERSION(0, 10, 30)
if (!queryResult) {
gst_query_unref(query);
gst_object_unref(GST_OBJECT(srcPad));
return true;
}
#else
// GStreamer < 0.10.30 doesn't set the query result correctly, so
// just ignore it to avoid a compilation warning.
// See https://bugzilla.gnome.org/show_bug.cgi?id=620490.
(void) queryResult;
#endif
GstFormat format;
gint64 position;
if (!gst_element_query_position(m_pipeline, &format, &position))
position = 0;
gdouble rate;
gint64 startValue, stopValue;
gst_query_parse_segment(query, &rate, &format, &startValue, &stopValue);
GstEvent* event = gst_event_new_new_segment(FALSE, rate, format, startValue, stopValue, position);
gst_pad_push_event(srcPad, event);
gst_query_unref(query);
gst_object_unref(GST_OBJECT(srcPad));
return true;
}
void GStreamerGWorld::exitFullscreen()
{
if (!m_dynamicPadName)
return;
// Get video sink bin and the elements to remove.
GOwnPtr<GstElement> videoSink;
g_object_get(m_pipeline, "video-sink", &videoSink.outPtr(), NULL);
GstElement* tee = gst_bin_get_by_name(GST_BIN(videoSink.get()), "videoTee");
GstElement* platformVideoSink = gst_bin_get_by_name(GST_BIN(videoSink.get()), "platformVideoSink");
GstElement* queue = gst_bin_get_by_name(GST_BIN(videoSink.get()), "queue");
GstElement* colorspace = gst_bin_get_by_name(GST_BIN(videoSink.get()), "colorspace");
GstElement* videoScale = gst_bin_get_by_name(GST_BIN(videoSink.get()), "videoScale");
GstElement* valve = gst_bin_get_by_name(GST_BIN(videoSink.get()), "videoValve");
g_object_set(valve, "drop-probability", 0.0, NULL);
// Get pads to unlink and remove.
GstPad* srcPad = gst_element_get_static_pad(tee, m_dynamicPadName);
GstPad* sinkPad = gst_element_get_static_pad(queue, "sink");
// Block data flow towards the pipeline branch to remove.
gst_pad_set_blocked(srcPad, true);
// Unlink and release request pad.
gst_pad_unlink(srcPad, sinkPad);
gst_element_release_request_pad(tee, srcPad);
gst_object_unref(GST_OBJECT(srcPad));
gst_object_unref(GST_OBJECT(sinkPad));
// Unlink, remove and cleanup queue, ffmpegcolorspace, videoScale and sink.
gst_element_unlink_many(queue, colorspace, videoScale, platformVideoSink, NULL);
gst_bin_remove_many(GST_BIN(videoSink.get()), queue, colorspace, videoScale, platformVideoSink, NULL);
gst_element_set_state(queue, GST_STATE_NULL);
gst_element_set_state(colorspace, GST_STATE_NULL);
gst_element_set_state(videoScale, GST_STATE_NULL);
gst_element_set_state(platformVideoSink, GST_STATE_NULL);
gst_object_unref(queue);
gst_object_unref(colorspace);
gst_object_unref(videoScale);
gst_object_unref(platformVideoSink);
gst_object_unref(tee);
m_dynamicPadName = 0;
}
void GStreamerGWorld::setWindowOverlay(GstMessage* message)
{
GstObject* sink = GST_MESSAGE_SRC(message);
if (!GST_IS_X_OVERLAY(sink))
return;
if (g_object_class_find_property(G_OBJECT_GET_CLASS(sink), "force-aspect-ratio"))
g_object_set(sink, "force-aspect-ratio", TRUE, NULL);
if (m_videoWindow) {
m_videoWindow->prepareForOverlay(message);
// gst_x_overlay_set_window_handle was introduced in -plugins-base
// 0.10.31, just like the macro for checking the version.
#ifdef GST_CHECK_PLUGINS_BASE_VERSION
gst_x_overlay_set_window_handle(GST_X_OVERLAY(sink), m_videoWindow->videoWindowId());
#else
gst_x_overlay_set_xwindow_id(GST_X_OVERLAY(sink), m_videoWindow->videoWindowId());
#endif
}
}
}
#endif // USE(GSTREAMER)
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