1 /*
2 * Copyright (C) 2010 Igalia S.L
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 #include "config.h"
21 #include "GStreamerGWorld.h"
22 #if USE(GSTREAMER)
23
24 #include "GOwnPtrGStreamer.h"
25 #include <gst/gst.h>
26 #include <gst/interfaces/xoverlay.h>
27 #include <gst/pbutils/pbutils.h>
28
29 #if PLATFORM(GTK)
30 #include <gtk/gtk.h>
31 #ifdef GDK_WINDOWING_X11
32 #include <gdk/gdkx.h> // for GDK_WINDOW_XID
33 #endif
34 #endif
35
36 using namespace std;
37
38 namespace WebCore {
39
gstGWorldSyncMessageCallback(GstBus * bus,GstMessage * message,gpointer data)40 gboolean gstGWorldSyncMessageCallback(GstBus* bus, GstMessage* message, gpointer data)
41 {
42 ASSERT(GST_MESSAGE_TYPE(message) == GST_MESSAGE_ELEMENT);
43
44 GStreamerGWorld* gstGWorld = static_cast<GStreamerGWorld*>(data);
45
46 if (gst_structure_has_name(message->structure, "prepare-xwindow-id")
47 || gst_structure_has_name(message->structure, "have-ns-view"))
48 gstGWorld->setWindowOverlay(message);
49 return TRUE;
50 }
51
createGWorld(GstElement * pipeline)52 PassRefPtr<GStreamerGWorld> GStreamerGWorld::createGWorld(GstElement* pipeline)
53 {
54 return adoptRef(new GStreamerGWorld(pipeline));
55 }
56
GStreamerGWorld(GstElement * pipeline)57 GStreamerGWorld::GStreamerGWorld(GstElement* pipeline)
58 : m_pipeline(pipeline)
59 , m_dynamicPadName(0)
60 {
61 // XOverlay messages need to be handled synchronously.
62 GstBus* bus = gst_pipeline_get_bus(GST_PIPELINE(m_pipeline));
63 gst_bus_set_sync_handler(bus, gst_bus_sync_signal_handler, this);
64 g_signal_connect(bus, "sync-message::element", G_CALLBACK(gstGWorldSyncMessageCallback), this);
65 gst_object_unref(bus);
66 }
67
~GStreamerGWorld()68 GStreamerGWorld::~GStreamerGWorld()
69 {
70 exitFullscreen();
71
72 m_pipeline = 0;
73 }
74
enterFullscreen()75 bool GStreamerGWorld::enterFullscreen()
76 {
77 if (m_dynamicPadName)
78 return false;
79
80 if (!m_videoWindow)
81 m_videoWindow = PlatformVideoWindow::createWindow();
82
83 GstElement* platformVideoSink = gst_element_factory_make("autovideosink", "platformVideoSink");
84 GstElement* colorspace = gst_element_factory_make("ffmpegcolorspace", "colorspace");
85 GstElement* queue = gst_element_factory_make("queue", "queue");
86 GstElement* videoScale = gst_element_factory_make("videoscale", "videoScale");
87
88 // Get video sink bin and the tee inside.
89 GOwnPtr<GstElement> videoSink;
90 g_object_get(m_pipeline, "video-sink", &videoSink.outPtr(), NULL);
91 GstElement* tee = gst_bin_get_by_name(GST_BIN(videoSink.get()), "videoTee");
92 GstElement* valve = gst_bin_get_by_name(GST_BIN(videoSink.get()), "videoValve");
93
94 g_object_set(valve, "drop-probability", 1.0, NULL);
95
96 // Add and link a queue, ffmpegcolorspace, videoscale and sink in the bin.
97 gst_bin_add_many(GST_BIN(videoSink.get()), platformVideoSink, videoScale, colorspace, queue, NULL);
98 #if GST_CHECK_VERSION(0, 10, 30)
99 // Faster elements linking, if possible.
100 gst_element_link_pads_full(queue, "src", colorspace, "sink", GST_PAD_LINK_CHECK_NOTHING);
101 gst_element_link_pads_full(colorspace, "src", videoScale, "sink", GST_PAD_LINK_CHECK_NOTHING);
102 gst_element_link_pads_full(videoScale, "src", platformVideoSink, "sink", GST_PAD_LINK_CHECK_NOTHING);
103 #else
104 gst_element_link_many(queue, colorspace, videoScale, platformVideoSink, NULL);
105 #endif
106
107 // Link a new src pad from tee to queue.
108 GstPad* srcPad = gst_element_get_request_pad(tee, "src%d");
109 GstPad* sinkPad = gst_element_get_static_pad(queue, "sink");
110 gst_pad_link(srcPad, sinkPad);
111 gst_object_unref(GST_OBJECT(sinkPad));
112
113 m_dynamicPadName = gst_pad_get_name(srcPad);
114
115 // Roll new elements to pipeline state.
116 gst_element_sync_state_with_parent(queue);
117 gst_element_sync_state_with_parent(colorspace);
118 gst_element_sync_state_with_parent(videoScale);
119 gst_element_sync_state_with_parent(platformVideoSink);
120
121 gst_object_unref(tee);
122
123 // Query the current media segment informations and send them towards
124 // the new tee branch downstream.
125
126 GstQuery* query = gst_query_new_segment(GST_FORMAT_TIME);
127 gboolean queryResult = gst_element_query(m_pipeline, query);
128
129 #if GST_CHECK_VERSION(0, 10, 30)
130 if (!queryResult) {
131 gst_query_unref(query);
132 gst_object_unref(GST_OBJECT(srcPad));
133 return true;
134 }
135 #else
136 // GStreamer < 0.10.30 doesn't set the query result correctly, so
137 // just ignore it to avoid a compilation warning.
138 // See https://bugzilla.gnome.org/show_bug.cgi?id=620490.
139 (void) queryResult;
140 #endif
141
142 GstFormat format;
143 gint64 position;
144 if (!gst_element_query_position(m_pipeline, &format, &position))
145 position = 0;
146
147 gdouble rate;
148 gint64 startValue, stopValue;
149 gst_query_parse_segment(query, &rate, &format, &startValue, &stopValue);
150
151 GstEvent* event = gst_event_new_new_segment(FALSE, rate, format, startValue, stopValue, position);
152 gst_pad_push_event(srcPad, event);
153
154 gst_query_unref(query);
155 gst_object_unref(GST_OBJECT(srcPad));
156 return true;
157 }
158
exitFullscreen()159 void GStreamerGWorld::exitFullscreen()
160 {
161 if (!m_dynamicPadName)
162 return;
163
164 // Get video sink bin and the elements to remove.
165 GOwnPtr<GstElement> videoSink;
166 g_object_get(m_pipeline, "video-sink", &videoSink.outPtr(), NULL);
167 GstElement* tee = gst_bin_get_by_name(GST_BIN(videoSink.get()), "videoTee");
168 GstElement* platformVideoSink = gst_bin_get_by_name(GST_BIN(videoSink.get()), "platformVideoSink");
169 GstElement* queue = gst_bin_get_by_name(GST_BIN(videoSink.get()), "queue");
170 GstElement* colorspace = gst_bin_get_by_name(GST_BIN(videoSink.get()), "colorspace");
171 GstElement* videoScale = gst_bin_get_by_name(GST_BIN(videoSink.get()), "videoScale");
172
173 GstElement* valve = gst_bin_get_by_name(GST_BIN(videoSink.get()), "videoValve");
174
175 g_object_set(valve, "drop-probability", 0.0, NULL);
176
177 // Get pads to unlink and remove.
178 GstPad* srcPad = gst_element_get_static_pad(tee, m_dynamicPadName);
179 GstPad* sinkPad = gst_element_get_static_pad(queue, "sink");
180
181 // Block data flow towards the pipeline branch to remove.
182 gst_pad_set_blocked(srcPad, true);
183
184 // Unlink and release request pad.
185 gst_pad_unlink(srcPad, sinkPad);
186 gst_element_release_request_pad(tee, srcPad);
187 gst_object_unref(GST_OBJECT(srcPad));
188 gst_object_unref(GST_OBJECT(sinkPad));
189
190 // Unlink, remove and cleanup queue, ffmpegcolorspace, videoScale and sink.
191 gst_element_unlink_many(queue, colorspace, videoScale, platformVideoSink, NULL);
192 gst_bin_remove_many(GST_BIN(videoSink.get()), queue, colorspace, videoScale, platformVideoSink, NULL);
193 gst_element_set_state(queue, GST_STATE_NULL);
194 gst_element_set_state(colorspace, GST_STATE_NULL);
195 gst_element_set_state(videoScale, GST_STATE_NULL);
196 gst_element_set_state(platformVideoSink, GST_STATE_NULL);
197 gst_object_unref(queue);
198 gst_object_unref(colorspace);
199 gst_object_unref(videoScale);
200 gst_object_unref(platformVideoSink);
201
202 gst_object_unref(tee);
203 m_dynamicPadName = 0;
204 }
205
setWindowOverlay(GstMessage * message)206 void GStreamerGWorld::setWindowOverlay(GstMessage* message)
207 {
208 GstObject* sink = GST_MESSAGE_SRC(message);
209
210 if (!GST_IS_X_OVERLAY(sink))
211 return;
212
213 if (g_object_class_find_property(G_OBJECT_GET_CLASS(sink), "force-aspect-ratio"))
214 g_object_set(sink, "force-aspect-ratio", TRUE, NULL);
215
216 if (m_videoWindow) {
217 m_videoWindow->prepareForOverlay(message);
218
219 // gst_x_overlay_set_window_handle was introduced in -plugins-base
220 // 0.10.31, just like the macro for checking the version.
221 #ifdef GST_CHECK_PLUGINS_BASE_VERSION
222 gst_x_overlay_set_window_handle(GST_X_OVERLAY(sink), m_videoWindow->videoWindowId());
223 #else
224 gst_x_overlay_set_xwindow_id(GST_X_OVERLAY(sink), m_videoWindow->videoWindowId());
225 #endif
226 }
227 }
228
229 }
230 #endif // USE(GSTREAMER)
231