3 * Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
30 #include "gstqtsink.h"
31 #include <QtGui/QGuiApplication>
33 #define GST_CAT_DEFAULT gst_debug_qt_gl_sink
34 GST_DEBUG_CATEGORY (GST_CAT_DEFAULT);
36 static void gst_qt_sink_finalize (GObject * object);
37 static void gst_qt_sink_set_property (GObject * object, guint prop_id,
38 const GValue * value, GParamSpec * param_spec);
39 static void gst_qt_sink_get_property (GObject * object, guint prop_id,
40 GValue * value, GParamSpec * param_spec);
42 static gboolean gst_qt_sink_stop (GstBaseSink * bsink);
44 static gboolean gst_qt_sink_query (GstBaseSink * bsink, GstQuery * query);
46 static GstStateChangeReturn
47 gst_qt_sink_change_state (GstElement * element, GstStateChange transition);
49 static void gst_qt_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
50 GstClockTime * start, GstClockTime * end);
51 static gboolean gst_qt_sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
52 static GstFlowReturn gst_qt_sink_show_frame (GstVideoSink * bsink,
54 static gboolean gst_qt_sink_propose_allocation (GstBaseSink * bsink,
57 static GstStaticPadTemplate gst_qt_sink_template =
58 GST_STATIC_PAD_TEMPLATE ("sink",
61 GST_STATIC_CAPS ("video/x-raw(" GST_CAPS_FEATURE_MEMORY_GL_MEMORY "), "
62 "format = (string) RGBA, "
63 "width = " GST_VIDEO_SIZE_RANGE ", "
64 "height = " GST_VIDEO_SIZE_RANGE ", "
65 "framerate = " GST_VIDEO_FPS_RANGE ", "
66 "texture-target = (string) 2D"));
68 #define DEFAULT_FORCE_ASPECT_RATIO TRUE
69 #define DEFAULT_PAR_N 0
70 #define DEFAULT_PAR_D 1
76 PROP_FORCE_ASPECT_RATIO,
77 PROP_PIXEL_ASPECT_RATIO,
86 #define gst_qt_sink_parent_class parent_class
87 G_DEFINE_TYPE_WITH_CODE (GstQtSink, gst_qt_sink,
88 GST_TYPE_VIDEO_SINK, GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT,
89 "qtsink", 0, "Qt Video Sink"));
92 gst_qt_sink_class_init (GstQtSinkClass * klass)
94 GObjectClass *gobject_class;
95 GstElementClass *gstelement_class;
96 GstBaseSinkClass *gstbasesink_class;
97 GstVideoSinkClass *gstvideosink_class;
99 gobject_class = (GObjectClass *) klass;
100 gstelement_class = (GstElementClass *) klass;
101 gstbasesink_class = (GstBaseSinkClass *) klass;
102 gstvideosink_class = (GstVideoSinkClass *) klass;
104 gobject_class->set_property = gst_qt_sink_set_property;
105 gobject_class->get_property = gst_qt_sink_get_property;
107 gst_element_class_set_metadata (gstelement_class, "Qt Video Sink",
108 "Sink/Video", "A video sink the renders to a QQuickItem",
109 "Matthew Waters <matthew@centricular.com>");
111 g_object_class_install_property (gobject_class, PROP_WIDGET,
112 g_param_spec_pointer ("widget", "QQuickItem",
113 "The QQuickItem to place in the object heirachy",
114 (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
116 g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
117 g_param_spec_boolean ("force-aspect-ratio",
118 "Force aspect ratio",
119 "When enabled, scaling will respect original aspect ratio",
120 DEFAULT_FORCE_ASPECT_RATIO,
121 (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
123 g_object_class_install_property (gobject_class, PROP_PIXEL_ASPECT_RATIO,
124 gst_param_spec_fraction ("pixel-aspect-ratio", "Pixel Aspect Ratio",
125 "The pixel aspect ratio of the device", DEFAULT_PAR_N, DEFAULT_PAR_D,
127 (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
129 gst_element_class_add_static_pad_template (gstelement_class, &gst_qt_sink_template);
131 gobject_class->finalize = gst_qt_sink_finalize;
133 gstelement_class->change_state = gst_qt_sink_change_state;
134 gstbasesink_class->query = gst_qt_sink_query;
135 gstbasesink_class->set_caps = gst_qt_sink_set_caps;
136 gstbasesink_class->get_times = gst_qt_sink_get_times;
137 gstbasesink_class->propose_allocation = gst_qt_sink_propose_allocation;
138 gstbasesink_class->stop = gst_qt_sink_stop;
140 gstvideosink_class->show_frame = gst_qt_sink_show_frame;
144 gst_qt_sink_init (GstQtSink * qt_sink)
149 gst_qt_sink_set_property (GObject * object, guint prop_id,
150 const GValue * value, GParamSpec * pspec)
152 GstQtSink *qt_sink = GST_QT_SINK (object);
156 qt_sink->widget = static_cast<QtGLVideoItem *> (g_value_get_pointer (value));
158 case PROP_FORCE_ASPECT_RATIO:
159 g_return_if_fail (qt_sink->widget);
160 qt_sink->widget->setForceAspectRatio (g_value_get_boolean (value));
162 case PROP_PIXEL_ASPECT_RATIO:
163 g_return_if_fail (qt_sink->widget);
164 qt_sink->widget->setDAR (gst_value_get_fraction_numerator (value),
165 gst_value_get_fraction_denominator (value));
168 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
174 _reset (GstQtSink * qt_sink)
176 if (qt_sink->display) {
177 gst_object_unref (qt_sink->display);
178 qt_sink->display = NULL;
181 if (qt_sink->context) {
182 gst_object_unref (qt_sink->context);
183 qt_sink->context = NULL;
186 if (qt_sink->qt_context) {
187 gst_object_unref (qt_sink->qt_context);
188 qt_sink->qt_context = NULL;
193 gst_qt_sink_finalize (GObject * object)
195 GstQtSink *qt_sink = GST_QT_SINK (object);
199 G_OBJECT_CLASS (parent_class)->finalize (object);
203 gst_qt_sink_get_property (GObject * object, guint prop_id,
204 GValue * value, GParamSpec * pspec)
206 GstQtSink *qt_sink = GST_QT_SINK (object);
210 g_value_set_pointer (value, qt_sink->widget);
212 case PROP_FORCE_ASPECT_RATIO:
214 g_value_set_boolean (value, qt_sink->widget->getForceAspectRatio ());
216 g_value_set_boolean (value, DEFAULT_FORCE_ASPECT_RATIO);
218 case PROP_PIXEL_ASPECT_RATIO:
219 if (qt_sink->widget) {
221 qt_sink->widget->getDAR (&num, &den);
222 gst_value_set_fraction (value, num, den);
224 gst_value_set_fraction (value, DEFAULT_PAR_N, DEFAULT_PAR_D);
228 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
234 gst_qt_sink_query (GstBaseSink * bsink, GstQuery * query)
236 GstQtSink *qt_sink = GST_QT_SINK (bsink);
237 gboolean res = FALSE;
239 switch (GST_QUERY_TYPE (query)) {
240 case GST_QUERY_CONTEXT:
242 const gchar *context_type;
243 GstContext *context, *old_context;
246 ret = gst_gl_handle_context_query ((GstElement *) qt_sink, query,
247 &qt_sink->display, &qt_sink->qt_context);
249 if (qt_sink->display)
250 gst_gl_display_filter_gl_api (qt_sink->display, gst_gl_context_get_gl_api (qt_sink->qt_context));
252 gst_query_parse_context_type (query, &context_type);
254 if (g_strcmp0 (context_type, "gst.gl.local_context") == 0) {
257 gst_query_parse_context (query, &old_context);
260 context = gst_context_copy (old_context);
262 context = gst_context_new ("gst.gl.local_context", FALSE);
264 s = gst_context_writable_structure (context);
265 gst_structure_set (s, "context", GST_TYPE_GL_CONTEXT, qt_sink->context,
267 gst_query_set_context (query, context);
268 gst_context_unref (context);
270 ret = qt_sink->context != NULL;
272 GST_LOG_OBJECT (qt_sink, "context query of type %s %i", context_type,
281 res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
289 gst_qt_sink_stop (GstBaseSink * bsink)
294 static GstStateChangeReturn
295 gst_qt_sink_change_state (GstElement * element, GstStateChange transition)
297 GstQtSink *qt_sink = GST_QT_SINK (element);
298 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
299 QGuiApplication *app;
301 GST_DEBUG ("changing state: %s => %s",
302 gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
303 gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
305 switch (transition) {
306 case GST_STATE_CHANGE_NULL_TO_READY:
307 app = static_cast<QGuiApplication *> (QCoreApplication::instance ());
309 GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
310 ("%s", "Failed to connect to Qt"),
311 ("%s", "Could not retrieve QGuiApplication instance"));
312 return GST_STATE_CHANGE_FAILURE;
315 if (!qt_sink->widget) {
316 GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
317 ("%s", "Required property \'widget\' not set"),
319 return GST_STATE_CHANGE_FAILURE;
322 if (!qt_item_init_winsys (qt_sink->widget)) {
323 GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
324 ("%s", "Could not initialize window system"),
326 return GST_STATE_CHANGE_FAILURE;
329 qt_sink->display = qt_item_get_display (qt_sink->widget);
330 qt_sink->context = qt_item_get_context (qt_sink->widget);
331 qt_sink->qt_context = qt_item_get_qt_context (qt_sink->widget);
333 if (!qt_sink->display || !qt_sink->context || !qt_sink->qt_context) {
334 GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
335 ("%s", "Could not retrieve window system OpenGL configuration"),
337 return GST_STATE_CHANGE_FAILURE;
340 case GST_STATE_CHANGE_READY_TO_PAUSED:
342 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
348 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
349 if (ret == GST_STATE_CHANGE_FAILURE)
352 switch (transition) {
353 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
355 case GST_STATE_CHANGE_PAUSED_TO_READY:
356 qt_item_set_buffer (qt_sink->widget, NULL);
358 case GST_STATE_CHANGE_READY_TO_NULL:
368 gst_qt_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
369 GstClockTime * start, GstClockTime * end)
373 qt_sink = GST_QT_SINK (bsink);
375 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
376 *start = GST_BUFFER_TIMESTAMP (buf);
377 if (GST_BUFFER_DURATION_IS_VALID (buf))
378 *end = *start + GST_BUFFER_DURATION (buf);
380 if (GST_VIDEO_INFO_FPS_N (&qt_sink->v_info) > 0) {
382 gst_util_uint64_scale_int (GST_SECOND,
383 GST_VIDEO_INFO_FPS_D (&qt_sink->v_info),
384 GST_VIDEO_INFO_FPS_N (&qt_sink->v_info));
391 gst_qt_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
393 GstQtSink *qt_sink = GST_QT_SINK (bsink);
395 GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
397 if (!gst_video_info_from_caps (&qt_sink->v_info, caps))
400 if (!qt_item_set_caps (qt_sink->widget, caps))
407 gst_qt_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
411 GST_TRACE ("rendering buffer:%p", buf);
413 qt_sink = GST_QT_SINK (vsink);
415 qt_item_set_buffer (qt_sink->widget, buf);
421 gst_qt_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
423 GstQtSink *qt_sink = GST_QT_SINK (bsink);
425 GstStructure *config;
430 if (!qt_sink->display || !qt_sink->context)
433 gst_query_parse_allocation (query, &caps, &need_pool);
438 if ((pool = qt_sink->pool))
439 gst_object_ref (pool);
444 /* we had a pool, check caps */
445 GST_DEBUG_OBJECT (qt_sink, "check existing pool caps");
446 config = gst_buffer_pool_get_config (pool);
447 gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
449 if (!gst_caps_is_equal (caps, pcaps)) {
450 GST_DEBUG_OBJECT (qt_sink, "pool has different caps");
451 /* different caps, we can't use this pool */
452 gst_object_unref (pool);
455 gst_structure_free (config);
458 if (pool == NULL && need_pool) {
461 if (!gst_video_info_from_caps (&info, caps))
464 GST_DEBUG_OBJECT (qt_sink, "create new pool");
465 pool = gst_gl_buffer_pool_new (qt_sink->context);
467 /* the normal size of a frame */
470 config = gst_buffer_pool_get_config (pool);
471 gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
472 if (!gst_buffer_pool_set_config (pool, config))
475 /* we need at least 2 buffer because we hold on to the last one */
477 gst_query_add_allocation_pool (query, pool, size, 2, 0);
478 gst_object_unref (pool);
481 /* we also support various metadata */
482 gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, 0);
484 if (qt_sink->context->gl_vtable->FenceSync)
485 gst_query_add_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, 0);
492 GST_DEBUG_OBJECT (bsink, "no caps specified");
497 GST_DEBUG_OBJECT (bsink, "invalid caps specified");
502 GST_DEBUG_OBJECT (bsink, "failed setting config");