3 * Copyright (C) 2016 Freescale Semiconductor, Inc. All rights reserved.
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.
31 #include <QtGui/QGuiApplication>
33 #define GST_CAT_DEFAULT gst_debug_qt_gl_src
34 GST_DEBUG_CATEGORY (GST_CAT_DEFAULT);
36 #define DEFAULT_IS_LIVE TRUE
38 static void gst_qt_src_set_property (GObject * object, guint prop_id,
39 const GValue * value, GParamSpec * pspec);
40 static void gst_qt_src_get_property (GObject * object, guint prop_id,
41 GValue * value, GParamSpec * pspec);
43 static void gst_qt_src_finalize (GObject * object);
45 static gboolean gst_qt_src_setcaps (GstBaseSrc * bsrc, GstCaps * caps);
46 static GstCaps *gst_qt_src_get_caps (GstBaseSrc * bsrc, GstCaps * filter);
47 static gboolean gst_qt_src_query (GstBaseSrc * bsrc, GstQuery * query);
49 static gboolean gst_qt_src_decide_allocation (GstBaseSrc * bsrc,
51 static GstFlowReturn gst_qt_src_fill (GstPushSrc * psrc, GstBuffer * buffer);
52 static GstStateChangeReturn gst_qt_src_change_state (GstElement * element,
53 GstStateChange transition);
54 static gboolean gst_qt_src_start (GstBaseSrc * basesrc);
55 static gboolean gst_qt_src_stop (GstBaseSrc * basesrc);
57 static GstStaticPadTemplate gst_qt_src_template =
58 GST_STATIC_PAD_TEMPLATE ("src",
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"));
75 #define gst_qt_src_parent_class parent_class
76 G_DEFINE_TYPE_WITH_CODE (GstQtSrc, gst_qt_src,
77 GST_TYPE_PUSH_SRC, GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT,
78 "qtsrc", 0, "Qt Video Src"));
80 static const gfloat vertical_flip_matrix[] = {
81 1.0f, 0.0f, 0.0f, 0.0f,
82 0.0f, -1.0f, 0.0f, 1.0f,
83 0.0f, 0.0f, 1.0f, 0.0f,
84 0.0f, 0.0f, 0.0f, 1.0f,
88 gst_qt_src_class_init (GstQtSrcClass * klass)
90 GObjectClass *gobject_class = (GObjectClass *) klass;
91 GstElementClass *gstelement_class = (GstElementClass *) klass;
92 GstBaseSrcClass *gstbasesrc_class = (GstBaseSrcClass *) klass;
93 GstPushSrcClass *gstpushsrc_class = (GstPushSrcClass *) klass;
95 gobject_class->set_property = gst_qt_src_set_property;
96 gobject_class->get_property = gst_qt_src_get_property;
97 gobject_class->finalize = gst_qt_src_finalize;
99 gst_element_class_set_metadata (gstelement_class, "Qt Video Source",
100 "Source/Video", "A video src that captures a window from a QML view",
101 "Multimedia Team <shmmmw@freescale.com>");
103 g_object_class_install_property (gobject_class, PROP_WINDOW,
104 g_param_spec_pointer ("window", "QQuickWindow",
105 "The QQuickWindow to place in the object hierarchy",
106 (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
108 g_object_class_install_property (gobject_class, PROP_DEFAULT_FBO,
109 g_param_spec_boolean ("use-default-fbo",
110 "Whether to use default FBO",
111 "When set it will not create a new FBO for the QML render thread",
112 FALSE, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
114 gst_element_class_add_pad_template (gstelement_class,
115 gst_static_pad_template_get (&gst_qt_src_template));
117 gstelement_class->change_state = gst_qt_src_change_state;
118 gstbasesrc_class->set_caps = gst_qt_src_setcaps;
119 gstbasesrc_class->get_caps = gst_qt_src_get_caps;
120 gstbasesrc_class->query = gst_qt_src_query;
121 gstbasesrc_class->start = gst_qt_src_start;
122 gstbasesrc_class->stop = gst_qt_src_stop;
123 gstbasesrc_class->decide_allocation = gst_qt_src_decide_allocation;
125 gstpushsrc_class->fill = gst_qt_src_fill;
129 gst_qt_src_init (GstQtSrc * src)
131 gst_base_src_set_format (GST_BASE_SRC (src), GST_FORMAT_TIME);
132 gst_base_src_set_live (GST_BASE_SRC (src), DEFAULT_IS_LIVE);
133 src->default_fbo = FALSE;
134 src->pending_image_orientation = TRUE;
138 gst_qt_src_set_property (GObject * object, guint prop_id,
139 const GValue * value, GParamSpec * pspec)
141 GstQtSrc *qt_src = GST_QT_SRC (object);
146 static_cast < QQuickWindow * >(g_value_get_pointer (value));
148 if (qt_src->window) {
149 delete qt_src->window;
150 qt_src->window = NULL;
154 qt_src->window = new QtGLWindow (NULL, qt_src->qwindow);
158 case PROP_DEFAULT_FBO:
159 qt_src->default_fbo = g_value_get_boolean (value);
161 qt_window_use_default_fbo (qt_src->window, qt_src->default_fbo);
164 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
170 gst_qt_src_get_property (GObject * object, guint prop_id,
171 GValue * value, GParamSpec * pspec)
173 GstQtSrc *qt_src = GST_QT_SRC (object);
177 g_value_set_pointer (value, qt_src->qwindow);
179 case PROP_DEFAULT_FBO:
180 g_value_set_boolean (value, qt_src->default_fbo);
183 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
189 gst_qt_src_finalize (GObject * object)
191 GstQtSrc *qt_src = GST_QT_SRC (object);
193 GST_DEBUG ("qmlglsrc finalize");
195 gst_object_unref (qt_src->context);
196 qt_src->context = NULL;
198 if (qt_src->qt_context)
199 gst_object_unref (qt_src->qt_context);
200 qt_src->qt_context = NULL;
203 gst_object_unref (qt_src->display);
204 qt_src->display = NULL;
207 delete qt_src->window;
209 G_OBJECT_CLASS (parent_class)->finalize (object);
213 gst_qt_src_setcaps (GstBaseSrc * bsrc, GstCaps * caps)
215 GstQtSrc *qt_src = GST_QT_SRC (bsrc);
217 GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
219 if (!gst_video_info_from_caps (&qt_src->v_info, caps))
222 if (!qt_window_set_caps (qt_src->window, caps))
229 gst_qt_src_get_caps (GstBaseSrc * bsrc, GstCaps * filter)
231 GstCaps *caps = NULL, *temp = NULL;
232 GstPadTemplate *pad_template;
233 GstBaseSrcClass *bclass = GST_BASE_SRC_GET_CLASS (bsrc);
234 GstQtSrc *qt_src = GST_QT_SRC (bsrc);
238 if (qt_src->window) {
239 qt_src->window->getGeometry (&width, &height);
243 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
244 if (pad_template != NULL)
245 caps = gst_pad_template_get_caps (pad_template);
247 if (qt_src->window) {
248 temp = gst_caps_copy (caps);
249 guint n_caps = gst_caps_get_size (caps);
251 for (i = 0; i < n_caps; i++) {
252 GstStructure *s = gst_caps_get_structure (temp, i);
253 gst_structure_set (s, "width", G_TYPE_INT, width, NULL);
254 gst_structure_set (s, "height", G_TYPE_INT, height, NULL);
255 /* because the framerate is unknown */
256 gst_structure_set (s, "framerate", GST_TYPE_FRACTION, 0, 1, NULL);
257 gst_structure_set (s, "pixel-aspect-ratio",
258 GST_TYPE_FRACTION, 1, 1, NULL);
261 gst_caps_unref (caps);
266 GstCaps *intersection;
269 gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
270 gst_caps_unref (caps);
278 gst_qt_src_query (GstBaseSrc * bsrc, GstQuery * query)
280 GstQtSrc *qt_src = GST_QT_SRC (bsrc);
281 gboolean res = FALSE;
283 switch (GST_QUERY_TYPE (query)) {
284 case GST_QUERY_CONTEXT:
286 const gchar *context_type;
287 GstContext *context, *old_context;
290 if (!qt_window_is_scenegraph_initialized (qt_src->window))
293 if (!qt_src->display && !qt_src->qt_context) {
294 qt_src->display = qt_window_get_display (qt_src->window);
295 qt_src->qt_context = qt_window_get_qt_context (qt_src->window);
298 ret = gst_gl_handle_context_query ((GstElement *) qt_src, query,
299 &qt_src->display, &qt_src->qt_context);
302 gst_gl_display_filter_gl_api (qt_src->display,
303 gst_gl_context_get_gl_api (qt_src->qt_context));
305 gst_query_parse_context_type (query, &context_type);
307 if (g_strcmp0 (context_type, "gst.gl.app_context") == 0) {
310 gst_query_parse_context (query, &old_context);
313 context = gst_context_copy (old_context);
315 context = gst_context_new ("gst.gl.app_context", FALSE);
317 s = gst_context_writable_structure (context);
318 gst_structure_set (s, "context", GST_TYPE_GL_CONTEXT,
319 qt_src->qt_context, NULL);
320 gst_query_set_context (query, context);
321 gst_context_unref (context);
323 ret = qt_src->qt_context != NULL;
325 GST_LOG_OBJECT (qt_src, "context query of type %s %i", context_type, ret);
333 res = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
341 _find_local_gl_context (GstQtSrc * qt_src)
345 const GstStructure *s;
350 query = gst_query_new_context ("gst.gl.local_context");
352 && gst_gl_run_query (GST_ELEMENT (qt_src), query, GST_PAD_SRC)) {
353 gst_query_parse_context (query, &context);
355 s = gst_context_get_structure (context);
356 gst_structure_get (s, "context", GST_TYPE_GL_CONTEXT, &qt_src->context,
361 GST_DEBUG_OBJECT (qt_src, "found local context %p", qt_src->context);
363 gst_query_unref (query);
372 gst_qt_src_decide_allocation (GstBaseSrc * bsrc, GstQuery * query)
374 GstBufferPool *pool = NULL;
375 GstStructure *config;
377 guint min, max, size, n, i;
378 gboolean update_pool, update_allocator;
379 GstAllocator *allocator;
380 GstAllocationParams params;
381 GstGLVideoAllocationParams *glparams;
383 GstQtSrc *qt_src = GST_QT_SRC (bsrc);
385 if (gst_query_find_allocation_meta (query,
386 GST_VIDEO_AFFINE_TRANSFORMATION_META_API_TYPE, NULL)) {
387 qt_src->downstream_supports_affine_meta = TRUE;
389 qt_src->downstream_supports_affine_meta = FALSE;
392 gst_query_parse_allocation (query, &caps, NULL);
396 gst_video_info_from_caps (&vinfo, caps);
398 n = gst_query_get_n_allocation_pools (query);
401 for (i = 0; i < n; i++) {
402 gst_query_parse_nth_allocation_pool (query, i, &pool, &size, &min, &max);
404 if (!pool || !GST_IS_GL_BUFFER_POOL (pool)) {
406 gst_object_unref (pool);
418 if (!qt_src->context && !_find_local_gl_context (qt_src))
422 if (!qt_src->context || !GST_IS_GL_CONTEXT (qt_src->context))
425 pool = gst_gl_buffer_pool_new (qt_src->context);
426 GST_INFO_OBJECT (qt_src, "No pool, create one ourself %p", pool);
429 config = gst_buffer_pool_get_config (pool);
431 gst_buffer_pool_config_set_params (config, caps, size, min, max);
432 gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
433 if (gst_query_find_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, NULL))
434 gst_buffer_pool_config_add_option (config,
435 GST_BUFFER_POOL_OPTION_GL_SYNC_META);
437 if (gst_query_get_n_allocation_params (query) > 0) {
438 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
439 gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
440 GST_INFO_OBJECT (qt_src, "got allocator %p", allocator);
441 update_allocator = TRUE;
444 gst_allocation_params_init (¶ms);
445 update_allocator = FALSE;
449 gst_gl_video_allocation_params_new (qt_src->context, ¶ms, &vinfo, 0,
450 NULL, GST_GL_TEXTURE_TARGET_2D, GST_VIDEO_GL_TEXTURE_TYPE_RGBA);
451 gst_buffer_pool_config_set_gl_allocation_params (config,
452 (GstGLAllocationParams *) glparams);
453 gst_gl_allocation_params_free ((GstGLAllocationParams *) glparams);
455 if (!gst_buffer_pool_set_config (pool, config))
456 GST_WARNING_OBJECT (qt_src, "Failed to set buffer pool config");
458 if (update_allocator)
459 gst_query_set_nth_allocation_param (query, 0, allocator, ¶ms);
461 gst_query_add_allocation_param (query, allocator, ¶ms);
463 gst_object_unref (allocator);
466 gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
468 gst_query_add_allocation_pool (query, pool, size, min, max);
469 gst_object_unref (pool);
471 GST_INFO_OBJECT (qt_src, "successfully decide_allocation");
476 gst_qt_src_fill (GstPushSrc * psrc, GstBuffer * buffer)
478 GstQtSrc *qt_src = GST_QT_SRC (psrc);
480 GST_DEBUG_OBJECT (qt_src, "setting buffer %p", buffer);
482 if (!qt_window_set_buffer (qt_src->window, buffer)) {
483 GST_ERROR_OBJECT (qt_src, "failed to fill buffer %p", buffer);
484 return GST_FLOW_ERROR;
487 if (!qt_src->downstream_supports_affine_meta) {
488 if (qt_src->pending_image_orientation) {
489 /* let downstream know the image orientation is vertical filp */
490 GstTagList *image_orientation_tag =
491 gst_tag_list_new (GST_TAG_IMAGE_ORIENTATION, "flip-rotate-180", NULL);
493 gst_pad_push_event (GST_BASE_SRC_PAD (psrc),
494 gst_event_new_tag (image_orientation_tag));
496 qt_src->pending_image_orientation = FALSE;
499 GstVideoAffineTransformationMeta *trans_meta;
500 trans_meta = gst_buffer_add_video_affine_transformation_meta (buffer);
501 gst_video_affine_transformation_meta_apply_matrix (trans_meta,
502 vertical_flip_matrix);
505 GST_DEBUG_OBJECT (qt_src, "buffer fill done %p", buffer);
510 static GstStateChangeReturn
511 gst_qt_src_change_state (GstElement * element, GstStateChange transition)
513 GstQtSrc *qt_src = GST_QT_SRC (element);
514 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
515 QGuiApplication *app;
517 GST_DEBUG ("changing state: %s => %s",
518 gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
519 gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
521 switch (transition) {
522 case GST_STATE_CHANGE_NULL_TO_READY:
523 app = static_cast < QGuiApplication * >(QCoreApplication::instance ());
525 GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
526 ("%s", "Failed to connect to Qt"),
527 ("%s", "Could not retrieve QGuiApplication instance"));
528 return GST_STATE_CHANGE_FAILURE;
531 if (!qt_src->window) {
532 GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
533 ("%s", "Required property \'window\' not set"), (NULL));
534 return GST_STATE_CHANGE_FAILURE;
537 if (!qt_window_is_scenegraph_initialized (qt_src->window)) {
538 GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
539 ("%s", "Could not initialize window system"), (NULL));
540 return GST_STATE_CHANGE_FAILURE;
543 qt_window_use_default_fbo (qt_src->window, qt_src->default_fbo);
546 case GST_STATE_CHANGE_READY_TO_PAUSED:
548 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
554 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
555 if (ret == GST_STATE_CHANGE_FAILURE)
558 switch (transition) {
559 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
561 case GST_STATE_CHANGE_PAUSED_TO_READY:
563 case GST_STATE_CHANGE_READY_TO_NULL:
573 gst_qt_src_start (GstBaseSrc * basesrc)
575 GstQtSrc *qt_src = GST_QT_SRC (basesrc);
577 /* already has get OpenGL configuration from qt */
578 if (qt_src->display && qt_src->qt_context)
581 if (!qt_window_is_scenegraph_initialized (qt_src->window))
584 qt_src->display = qt_window_get_display (qt_src->window);
585 qt_src->qt_context = qt_window_get_qt_context (qt_src->window);
587 if (!qt_src->display || !qt_src->qt_context) {
588 GST_ERROR_OBJECT (qt_src,
589 "Could not retrieve window system OpenGL configuration");
593 GST_DEBUG_OBJECT (qt_src, "Got qt display %p and qt gl context %p",
594 qt_src->display, qt_src->qt_context);
599 gst_qt_src_stop (GstBaseSrc * basesrc)