1 /*
2 * GStreamer
3 * Copyright (C) 2016 Freescale Semiconductor, Inc. All rights reserved.
4 *
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.
9 *
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.
14 *
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.
19 */
20
21 /**
22 * SECTION:qmlglsrc
23 *
24 */
25
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29
30 #include "gstqtsrc.h"
31 #include <QtGui/QGuiApplication>
32
33 #define GST_CAT_DEFAULT gst_debug_qt_gl_src
34 GST_DEBUG_CATEGORY (GST_CAT_DEFAULT);
35
36 #define DEFAULT_IS_LIVE TRUE
37
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);
42
43 static void gst_qt_src_finalize (GObject * object);
44
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);
48
49 static gboolean gst_qt_src_decide_allocation (GstBaseSrc * bsrc,
50 GstQuery * query);
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);
56
57 static GstStaticPadTemplate gst_qt_src_template =
58 GST_STATIC_PAD_TEMPLATE ("src",
59 GST_PAD_SRC,
60 GST_PAD_ALWAYS,
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"));
67
68 enum
69 {
70 ARG_0,
71 PROP_WINDOW,
72 PROP_DEFAULT_FBO
73 };
74
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"));
79
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,
85 };
86
87 static void
gst_qt_src_class_init(GstQtSrcClass * klass)88 gst_qt_src_class_init (GstQtSrcClass * klass)
89 {
90 GObjectClass *gobject_class = (GObjectClass *) klass;
91 GstElementClass *gstelement_class = (GstElementClass *) klass;
92 GstBaseSrcClass *gstbasesrc_class = (GstBaseSrcClass *) klass;
93 GstPushSrcClass *gstpushsrc_class = (GstPushSrcClass *) klass;
94
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;
98
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>");
102
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)));
107
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)));
113
114 gst_element_class_add_pad_template (gstelement_class,
115 gst_static_pad_template_get (&gst_qt_src_template));
116
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;
124
125 gstpushsrc_class->fill = gst_qt_src_fill;
126 }
127
128 static void
gst_qt_src_init(GstQtSrc * src)129 gst_qt_src_init (GstQtSrc * src)
130 {
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;
135 }
136
137 static void
gst_qt_src_set_property(GObject * object,guint prop_id,const GValue * value,GParamSpec * pspec)138 gst_qt_src_set_property (GObject * object, guint prop_id,
139 const GValue * value, GParamSpec * pspec)
140 {
141 GstQtSrc *qt_src = GST_QT_SRC (object);
142
143 switch (prop_id) {
144 case PROP_WINDOW:{
145 qt_src->qwindow =
146 static_cast < QQuickWindow * >(g_value_get_pointer (value));
147
148 if (qt_src->window) {
149 delete qt_src->window;
150 qt_src->window = NULL;
151 }
152
153 if (qt_src->qwindow)
154 qt_src->window = new QtGLWindow (NULL, qt_src->qwindow);
155
156 break;
157 }
158 case PROP_DEFAULT_FBO:
159 qt_src->default_fbo = g_value_get_boolean (value);
160 if (qt_src->window)
161 qt_window_use_default_fbo (qt_src->window, qt_src->default_fbo);
162 break;
163 default:
164 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
165 break;
166 }
167 }
168
169 static void
gst_qt_src_get_property(GObject * object,guint prop_id,GValue * value,GParamSpec * pspec)170 gst_qt_src_get_property (GObject * object, guint prop_id,
171 GValue * value, GParamSpec * pspec)
172 {
173 GstQtSrc *qt_src = GST_QT_SRC (object);
174
175 switch (prop_id) {
176 case PROP_WINDOW:
177 g_value_set_pointer (value, qt_src->qwindow);
178 break;
179 case PROP_DEFAULT_FBO:
180 g_value_set_boolean (value, qt_src->default_fbo);
181 break;
182 default:
183 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
184 break;
185 }
186 }
187
188 static void
gst_qt_src_finalize(GObject * object)189 gst_qt_src_finalize (GObject * object)
190 {
191 GstQtSrc *qt_src = GST_QT_SRC (object);
192
193 GST_DEBUG ("qmlglsrc finalize");
194 if (qt_src->context)
195 gst_object_unref (qt_src->context);
196 qt_src->context = NULL;
197
198 if (qt_src->qt_context)
199 gst_object_unref (qt_src->qt_context);
200 qt_src->qt_context = NULL;
201
202 if (qt_src->display)
203 gst_object_unref (qt_src->display);
204 qt_src->display = NULL;
205
206 if (qt_src->window)
207 delete qt_src->window;
208
209 G_OBJECT_CLASS (parent_class)->finalize (object);
210 }
211
212 static gboolean
gst_qt_src_setcaps(GstBaseSrc * bsrc,GstCaps * caps)213 gst_qt_src_setcaps (GstBaseSrc * bsrc, GstCaps * caps)
214 {
215 GstQtSrc *qt_src = GST_QT_SRC (bsrc);
216
217 GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
218
219 if (!gst_video_info_from_caps (&qt_src->v_info, caps))
220 return FALSE;
221
222 if (!qt_window_set_caps (qt_src->window, caps))
223 return FALSE;
224
225 return TRUE;
226 }
227
228 static GstCaps *
gst_qt_src_get_caps(GstBaseSrc * bsrc,GstCaps * filter)229 gst_qt_src_get_caps (GstBaseSrc * bsrc, GstCaps * filter)
230 {
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);
235 guint i;
236 gint width, height;
237
238 if (qt_src->window) {
239 qt_src->window->getGeometry (&width, &height);
240 }
241
242 pad_template =
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);
246
247 if (qt_src->window) {
248 temp = gst_caps_copy (caps);
249 guint n_caps = gst_caps_get_size (caps);
250
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);
259 }
260
261 gst_caps_unref (caps);
262 caps = temp;
263 }
264
265 if (filter) {
266 GstCaps *intersection;
267
268 intersection =
269 gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
270 gst_caps_unref (caps);
271 caps = intersection;
272 }
273
274 return caps;
275 }
276
277 static gboolean
gst_qt_src_query(GstBaseSrc * bsrc,GstQuery * query)278 gst_qt_src_query (GstBaseSrc * bsrc, GstQuery * query)
279 {
280 GstQtSrc *qt_src = GST_QT_SRC (bsrc);
281 gboolean res = FALSE;
282
283 switch (GST_QUERY_TYPE (query)) {
284 case GST_QUERY_CONTEXT:
285 {
286 if (!qt_window_is_scenegraph_initialized (qt_src->window))
287 return FALSE;
288
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);
292 }
293
294 if (gst_gl_handle_context_query ((GstElement *) qt_src, query,
295 qt_src->display, qt_src->context, qt_src->qt_context))
296 return TRUE;
297
298 /* fallthrough */
299 }
300 default:
301 res = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
302 break;
303 }
304
305 return res;
306 }
307
308 static gboolean
_find_local_gl_context(GstQtSrc * qt_src)309 _find_local_gl_context (GstQtSrc * qt_src)
310 {
311 if (gst_gl_query_local_gl_context (GST_ELEMENT (qt_src), GST_PAD_SRC,
312 &qt_src->context))
313 return TRUE;
314 return FALSE;
315 }
316
317 static gboolean
gst_qt_src_decide_allocation(GstBaseSrc * bsrc,GstQuery * query)318 gst_qt_src_decide_allocation (GstBaseSrc * bsrc, GstQuery * query)
319 {
320 GstBufferPool *pool = NULL;
321 GstStructure *config;
322 GstCaps *caps;
323 guint min, max, size, n, i;
324 gboolean update_pool, update_allocator;
325 GstAllocator *allocator;
326 GstAllocationParams params;
327 GstGLVideoAllocationParams *glparams;
328 GstVideoInfo vinfo;
329 GstQtSrc *qt_src = GST_QT_SRC (bsrc);
330
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;
334 } else {
335 qt_src->downstream_supports_affine_meta = FALSE;
336 }
337
338 gst_query_parse_allocation (query, &caps, NULL);
339 if (!caps)
340 return FALSE;
341
342 gst_video_info_from_caps (&vinfo, caps);
343
344 n = gst_query_get_n_allocation_pools (query);
345 if (n > 0) {
346 update_pool = TRUE;
347 for (i = 0; i < n; i++) {
348 gst_query_parse_nth_allocation_pool (query, i, &pool, &size, &min, &max);
349
350 if (!pool || !GST_IS_GL_BUFFER_POOL (pool)) {
351 if (pool)
352 gst_object_unref (pool);
353 pool = NULL;
354 }
355 }
356 }
357
358 if (!pool) {
359 size = vinfo.size;
360 min = max = 0;
361 update_pool = FALSE;
362 }
363
364 if (!qt_src->context && !_find_local_gl_context (qt_src))
365 return FALSE;
366
367 if (!pool) {
368 if (!qt_src->context || !GST_IS_GL_CONTEXT (qt_src->context))
369 return FALSE;
370
371 pool = gst_gl_buffer_pool_new (qt_src->context);
372 GST_INFO_OBJECT (qt_src, "No pool, create one ourself %p", pool);
373 }
374
375 config = gst_buffer_pool_get_config (pool);
376
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);
382
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;
388 } else {
389 allocator = NULL;
390 gst_allocation_params_init (¶ms);
391 update_allocator = FALSE;
392 }
393
394 glparams =
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);
400
401 if (!gst_buffer_pool_set_config (pool, config))
402 GST_WARNING_OBJECT (qt_src, "Failed to set buffer pool config");
403
404 if (update_allocator)
405 gst_query_set_nth_allocation_param (query, 0, allocator, ¶ms);
406 else
407 gst_query_add_allocation_param (query, allocator, ¶ms);
408 if (allocator)
409 gst_object_unref (allocator);
410
411 if (update_pool)
412 gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
413 else
414 gst_query_add_allocation_pool (query, pool, size, min, max);
415 gst_object_unref (pool);
416
417 GST_INFO_OBJECT (qt_src, "successfully decide_allocation");
418 return TRUE;
419 }
420
421 static GstFlowReturn
gst_qt_src_fill(GstPushSrc * psrc,GstBuffer * buffer)422 gst_qt_src_fill (GstPushSrc * psrc, GstBuffer * buffer)
423 {
424 GstQtSrc *qt_src = GST_QT_SRC (psrc);
425
426 GST_DEBUG_OBJECT (qt_src, "setting buffer %p", buffer);
427
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;
431 }
432
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);
438
439 gst_pad_push_event (GST_BASE_SRC_PAD (psrc),
440 gst_event_new_tag (image_orientation_tag));
441
442 qt_src->pending_image_orientation = FALSE;
443 }
444 } else {
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);
449 }
450
451 GST_DEBUG_OBJECT (qt_src, "buffer fill done %p", buffer);
452
453 return GST_FLOW_OK;
454 }
455
456 static GstStateChangeReturn
gst_qt_src_change_state(GstElement * element,GstStateChange transition)457 gst_qt_src_change_state (GstElement * element, GstStateChange transition)
458 {
459 GstQtSrc *qt_src = GST_QT_SRC (element);
460 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
461 QGuiApplication *app;
462
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)));
466
467 switch (transition) {
468 case GST_STATE_CHANGE_NULL_TO_READY:
469 app = static_cast < QGuiApplication * >(QCoreApplication::instance ());
470 if (!app) {
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;
475 }
476
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;
481 }
482
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;
487 }
488
489 qt_window_use_default_fbo (qt_src->window, qt_src->default_fbo);
490
491 break;
492 case GST_STATE_CHANGE_READY_TO_PAUSED:
493 break;
494 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
495 break;
496 default:
497 break;
498 }
499
500 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
501 if (ret == GST_STATE_CHANGE_FAILURE)
502 return ret;
503
504 switch (transition) {
505 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
506 break;
507 case GST_STATE_CHANGE_PAUSED_TO_READY:
508 break;
509 case GST_STATE_CHANGE_READY_TO_NULL:
510 break;
511 default:
512 break;
513 }
514
515 return ret;
516 }
517
518 static gboolean
gst_qt_src_start(GstBaseSrc * basesrc)519 gst_qt_src_start (GstBaseSrc * basesrc)
520 {
521 GstQtSrc *qt_src = GST_QT_SRC (basesrc);
522
523 /* already has get OpenGL configuration from qt */
524 if (qt_src->display && qt_src->qt_context)
525 return TRUE;
526
527 if (!qt_window_is_scenegraph_initialized (qt_src->window))
528 return FALSE;
529
530 qt_src->display = qt_window_get_display (qt_src->window);
531 qt_src->qt_context = qt_window_get_qt_context (qt_src->window);
532
533 if (!qt_src->display || !qt_src->qt_context) {
534 GST_ERROR_OBJECT (qt_src,
535 "Could not retrieve window system OpenGL configuration");
536 return FALSE;
537 }
538
539 GST_DEBUG_OBJECT (qt_src, "Got qt display %p and qt gl context %p",
540 qt_src->display, qt_src->qt_context);
541 return TRUE;
542 }
543
544 static gboolean
gst_qt_src_stop(GstBaseSrc * basesrc)545 gst_qt_src_stop (GstBaseSrc * basesrc)
546 {
547 return TRUE;
548 }
549