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 if (!qt_window_is_scenegraph_initialized (qt_src->window))
289 if (!qt_src->display && !qt_src->qt_context) {
290 qt_src->display = qt_window_get_display (qt_src->window);
291 qt_src->qt_context = qt_window_get_qt_context (qt_src->window);
294 if (gst_gl_handle_context_query ((GstElement *) qt_src, query,
295 qt_src->display, qt_src->context, qt_src->qt_context))
301 res = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
309 _find_local_gl_context (GstQtSrc * qt_src)
311 if (gst_gl_query_local_gl_context (GST_ELEMENT (qt_src), GST_PAD_SRC,
318 gst_qt_src_decide_allocation (GstBaseSrc * bsrc, GstQuery * query)
320 GstBufferPool *pool = NULL;
321 GstStructure *config;
323 guint min, max, size, n, i;
324 gboolean update_pool, update_allocator;
325 GstAllocator *allocator;
326 GstAllocationParams params;
327 GstGLVideoAllocationParams *glparams;
329 GstQtSrc *qt_src = GST_QT_SRC (bsrc);
331 if (gst_query_find_allocation_meta (query,
332 GST_VIDEO_AFFINE_TRANSFORMATION_META_API_TYPE, NULL)) {
333 qt_src->downstream_supports_affine_meta = TRUE;
335 qt_src->downstream_supports_affine_meta = FALSE;
338 gst_query_parse_allocation (query, &caps, NULL);
342 gst_video_info_from_caps (&vinfo, caps);
344 n = gst_query_get_n_allocation_pools (query);
347 for (i = 0; i < n; i++) {
348 gst_query_parse_nth_allocation_pool (query, i, &pool, &size, &min, &max);
350 if (!pool || !GST_IS_GL_BUFFER_POOL (pool)) {
352 gst_object_unref (pool);
364 if (!qt_src->context && !_find_local_gl_context (qt_src))
368 if (!qt_src->context || !GST_IS_GL_CONTEXT (qt_src->context))
371 pool = gst_gl_buffer_pool_new (qt_src->context);
372 GST_INFO_OBJECT (qt_src, "No pool, create one ourself %p", pool);
375 config = gst_buffer_pool_get_config (pool);
377 gst_buffer_pool_config_set_params (config, caps, size, min, max);
378 gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
379 if (gst_query_find_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, NULL))
380 gst_buffer_pool_config_add_option (config,
381 GST_BUFFER_POOL_OPTION_GL_SYNC_META);
383 if (gst_query_get_n_allocation_params (query) > 0) {
384 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
385 gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
386 GST_INFO_OBJECT (qt_src, "got allocator %p", allocator);
387 update_allocator = TRUE;
390 gst_allocation_params_init (¶ms);
391 update_allocator = FALSE;
395 gst_gl_video_allocation_params_new (qt_src->context, ¶ms, &vinfo, 0,
396 NULL, GST_GL_TEXTURE_TARGET_2D, GST_GL_RGBA);
397 gst_buffer_pool_config_set_gl_allocation_params (config,
398 (GstGLAllocationParams *) glparams);
399 gst_gl_allocation_params_free ((GstGLAllocationParams *) glparams);
401 if (!gst_buffer_pool_set_config (pool, config))
402 GST_WARNING_OBJECT (qt_src, "Failed to set buffer pool config");
404 if (update_allocator)
405 gst_query_set_nth_allocation_param (query, 0, allocator, ¶ms);
407 gst_query_add_allocation_param (query, allocator, ¶ms);
409 gst_object_unref (allocator);
412 gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
414 gst_query_add_allocation_pool (query, pool, size, min, max);
415 gst_object_unref (pool);
417 GST_INFO_OBJECT (qt_src, "successfully decide_allocation");
422 gst_qt_src_fill (GstPushSrc * psrc, GstBuffer * buffer)
424 GstQtSrc *qt_src = GST_QT_SRC (psrc);
426 GST_DEBUG_OBJECT (qt_src, "setting buffer %p", buffer);
428 if (!qt_window_set_buffer (qt_src->window, buffer)) {
429 GST_ERROR_OBJECT (qt_src, "failed to fill buffer %p", buffer);
430 return GST_FLOW_ERROR;
433 if (!qt_src->downstream_supports_affine_meta) {
434 if (qt_src->pending_image_orientation) {
435 /* let downstream know the image orientation is vertical filp */
436 GstTagList *image_orientation_tag =
437 gst_tag_list_new (GST_TAG_IMAGE_ORIENTATION, "flip-rotate-180", NULL);
439 gst_pad_push_event (GST_BASE_SRC_PAD (psrc),
440 gst_event_new_tag (image_orientation_tag));
442 qt_src->pending_image_orientation = FALSE;
445 GstVideoAffineTransformationMeta *trans_meta;
446 trans_meta = gst_buffer_add_video_affine_transformation_meta (buffer);
447 gst_video_affine_transformation_meta_apply_matrix (trans_meta,
448 vertical_flip_matrix);
451 GST_DEBUG_OBJECT (qt_src, "buffer fill done %p", buffer);
456 static GstStateChangeReturn
457 gst_qt_src_change_state (GstElement * element, GstStateChange transition)
459 GstQtSrc *qt_src = GST_QT_SRC (element);
460 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
461 QGuiApplication *app;
463 GST_DEBUG ("changing state: %s => %s",
464 gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
465 gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
467 switch (transition) {
468 case GST_STATE_CHANGE_NULL_TO_READY:
469 app = static_cast < QGuiApplication * >(QCoreApplication::instance ());
471 GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
472 ("%s", "Failed to connect to Qt"),
473 ("%s", "Could not retrieve QGuiApplication instance"));
474 return GST_STATE_CHANGE_FAILURE;
477 if (!qt_src->window) {
478 GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
479 ("%s", "Required property \'window\' not set"), (NULL));
480 return GST_STATE_CHANGE_FAILURE;
483 if (!qt_window_is_scenegraph_initialized (qt_src->window)) {
484 GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
485 ("%s", "Could not initialize window system"), (NULL));
486 return GST_STATE_CHANGE_FAILURE;
489 qt_window_use_default_fbo (qt_src->window, qt_src->default_fbo);
492 case GST_STATE_CHANGE_READY_TO_PAUSED:
494 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
500 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
501 if (ret == GST_STATE_CHANGE_FAILURE)
504 switch (transition) {
505 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
507 case GST_STATE_CHANGE_PAUSED_TO_READY:
509 case GST_STATE_CHANGE_READY_TO_NULL:
519 gst_qt_src_start (GstBaseSrc * basesrc)
521 GstQtSrc *qt_src = GST_QT_SRC (basesrc);
523 /* already has get OpenGL configuration from qt */
524 if (qt_src->display && qt_src->qt_context)
527 if (!qt_window_is_scenegraph_initialized (qt_src->window))
530 qt_src->display = qt_window_get_display (qt_src->window);
531 qt_src->qt_context = qt_window_get_qt_context (qt_src->window);
533 if (!qt_src->display || !qt_src->qt_context) {
534 GST_ERROR_OBJECT (qt_src,
535 "Could not retrieve window system OpenGL configuration");
539 GST_DEBUG_OBJECT (qt_src, "Got qt display %p and qt gl context %p",
540 qt_src->display, qt_src->qt_context);
545 gst_qt_src_stop (GstBaseSrc * basesrc)