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 #ifdef HAVE_CONFIG_H
22 #include "config.h"
23 #endif
24
25 #include <stdio.h>
26
27 #include <gst/video/video.h>
28 #include <gst/gl/gstglfuncs.h>
29 #include "qtwindow.h"
30 #include "gstqsgtexture.h"
31 #include "gstqtglutility.h"
32
33 #include <QtCore/QDateTime>
34 #include <QtCore/QRunnable>
35 #include <QtGui/QGuiApplication>
36 #include <QtQuick/QQuickWindow>
37 #include <QOpenGLFramebufferObject>
38
39 /* compatability definitions... */
40 #ifndef GL_READ_FRAMEBUFFER
41 #define GL_READ_FRAMEBUFFER 0x8CA8
42 #endif
43 #ifndef GL_DRAW_FRAMEBUFFER
44 #define GL_DRAW_FRAMEBUFFER 0x8CA9
45 #endif
46
47 /**
48 * SECTION:
49 *
50 * #QtGLWindow is an #QQuickWindow that grab QtQuick view to GStreamer OpenGL video buffers.
51 */
52
53 GST_DEBUG_CATEGORY_STATIC (qt_window_debug);
54 #define GST_CAT_DEFAULT qt_window_debug
55
56 struct _QtGLWindowPrivate
57 {
58 GMutex lock;
59 GCond update_cond;
60
61 GstBuffer *buffer;
62 GstCaps *caps;
63 GstVideoInfo v_info;
64
65 gboolean initted;
66 gboolean updated;
67 gboolean quit;
68 gboolean result;
69 gboolean useDefaultFbo;
70
71 GstGLDisplay *display;
72 GstGLContext *other_context;
73
74 GLuint fbo;
75
76 /* frames that qmlview rendered in its gl thread */
77 quint64 frames_rendered;
78 quint64 start;
79 quint64 stop;
80 };
81
82 class InitQtGLContext : public QRunnable
83 {
84 public:
85 InitQtGLContext(QtGLWindow *window);
86 void run();
87
88 private:
89 QtGLWindow *window_;
90 };
91
InitQtGLContext(QtGLWindow * window)92 InitQtGLContext::InitQtGLContext(QtGLWindow *window) :
93 window_(window)
94 {
95 }
96
run()97 void InitQtGLContext::run()
98 {
99 window_->onSceneGraphInitialized();
100 }
101
QtGLWindow(QWindow * parent,QQuickWindow * src)102 QtGLWindow::QtGLWindow ( QWindow * parent, QQuickWindow *src ) :
103 QQuickWindow( parent ), source (src)
104 {
105 QGuiApplication *app = static_cast<QGuiApplication *> (QCoreApplication::instance ());
106 static volatile gsize _debug;
107
108 g_assert (app != NULL);
109
110 if (g_once_init_enter ((unsigned long *)&_debug)) {
111 GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "qtglwindow", 0, "Qt GL QuickWindow");
112 g_once_init_leave (&_debug, 1);
113 }
114
115 this->priv = g_new0 (QtGLWindowPrivate, 1);
116
117 g_mutex_init (&this->priv->lock);
118 g_cond_init (&this->priv->update_cond);
119
120 this->priv->display = gst_qt_get_gl_display();
121
122 connect (source, SIGNAL(beforeRendering()), this, SLOT(beforeRendering()), Qt::DirectConnection);
123 connect (source, SIGNAL(afterRendering()), this, SLOT(afterRendering()), Qt::DirectConnection);
124 connect (app, SIGNAL(aboutToQuit()), this, SLOT(aboutToQuit()), Qt::DirectConnection);
125 if (source->isSceneGraphInitialized())
126 source->scheduleRenderJob(new InitQtGLContext(this), QQuickWindow::BeforeSynchronizingStage);
127 else
128 connect (source, SIGNAL(sceneGraphInitialized()), this, SLOT(onSceneGraphInitialized()), Qt::DirectConnection);
129
130 connect (source, SIGNAL(sceneGraphInvalidated()), this, SLOT(onSceneGraphInvalidated()), Qt::DirectConnection);
131
132 GST_DEBUG ("%p init Qt Window", this->priv->display);
133 }
134
~QtGLWindow()135 QtGLWindow::~QtGLWindow()
136 {
137 GST_DEBUG ("deinit Qt Window");
138 g_mutex_clear (&this->priv->lock);
139 g_cond_clear (&this->priv->update_cond);
140 if (this->priv->other_context)
141 gst_object_unref(this->priv->other_context);
142 if (this->priv->display)
143 gst_object_unref(this->priv->display);
144 g_free (this->priv);
145 this->priv = NULL;
146 }
147
148 void
beforeRendering()149 QtGLWindow::beforeRendering()
150 {
151 unsigned int width, height;
152
153 g_mutex_lock (&this->priv->lock);
154
155 static volatile gsize once = 0;
156 if (g_once_init_enter((unsigned long *)&once)) {
157 this->priv->start = QDateTime::currentDateTime().toMSecsSinceEpoch();
158 g_once_init_leave(&once,1);
159 }
160
161 if (!fbo && !this->priv->useDefaultFbo) {
162
163 width = source->width();
164 height = source->height();
165
166 GST_DEBUG ("create new framebuffer object %dX%d", width, height);
167
168 fbo.reset(new QOpenGLFramebufferObject (width, height,
169 QOpenGLFramebufferObject::NoAttachment, GL_TEXTURE_2D, GL_RGBA));
170
171 source->setRenderTarget(fbo.data());
172 } else if (this->priv->useDefaultFbo) {
173 GST_DEBUG ("use default fbo for render target");
174 fbo.reset(NULL);
175 source->setRenderTarget(NULL);
176 }
177
178 g_mutex_unlock (&this->priv->lock);
179 }
180
181
182 void
afterRendering()183 QtGLWindow::afterRendering()
184 {
185 GstVideoFrame gl_frame;
186 GstVideoInfo *info;
187 GstGLContext *context;
188 gboolean ret;
189 guint width, height;
190 const GstGLFuncs *gl;
191 GLuint dst_tex;
192
193 g_mutex_lock (&this->priv->lock);
194
195 this->priv->frames_rendered++;
196
197 if(!this->priv->buffer || this->priv->updated == TRUE) {
198 GST_DEBUG ("skip this frame");
199 g_mutex_unlock (&this->priv->lock);
200 return;
201 }
202
203 GST_DEBUG ("copy buffer %p",this->priv->buffer);
204
205 width = GST_VIDEO_INFO_WIDTH (&this->priv->v_info);
206 height = GST_VIDEO_INFO_HEIGHT (&this->priv->v_info);
207 info = &this->priv->v_info;
208 context = this->priv->other_context;
209
210 gst_gl_context_activate (context, TRUE);
211 gl = context->gl_vtable;
212
213 ret = gst_video_frame_map (&gl_frame, info, this->priv->buffer,
214 (GstMapFlags) (GST_MAP_WRITE | GST_MAP_GL));
215
216 if (!ret) {
217 this->priv->buffer = NULL;
218 GST_ERROR ("Failed to map video frame");
219 goto errors;
220 }
221
222 gl->BindFramebuffer (GL_READ_FRAMEBUFFER, this->source->renderTargetId());
223
224 ret = gst_gl_context_check_framebuffer_status (context, GL_READ_FRAMEBUFFER);
225 if (!ret) {
226 GST_ERROR ("FBO errors");
227 goto errors;
228 }
229
230 dst_tex = *(guint *) gl_frame.data[0];
231 GST_DEBUG ("qml render target id %d, render to tex %d %dX%d",
232 this->source->renderTargetId(), dst_tex, width,height);
233
234 gl->BindTexture (GL_TEXTURE_2D, dst_tex);
235 if (gl->BlitFramebuffer) {
236 gl->BindFramebuffer (GL_DRAW_FRAMEBUFFER, this->priv->fbo);
237 gl->FramebufferTexture2D (GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
238 GL_TEXTURE_2D, dst_tex, 0);
239
240 ret = gst_gl_context_check_framebuffer_status (context, GL_DRAW_FRAMEBUFFER);
241 if (!ret) {
242 GST_ERROR ("FBO errors");
243 goto errors;
244 }
245 gl->ReadBuffer (GL_COLOR_ATTACHMENT0);
246 gl->BlitFramebuffer (0, 0, width, height,
247 0, 0, width, height,
248 GL_COLOR_BUFFER_BIT, GL_LINEAR);
249 } else {
250 gl->CopyTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, width, height, 0);
251 }
252
253 GST_DEBUG ("rendering finished");
254
255 errors:
256 gl->BindFramebuffer (GL_FRAMEBUFFER, 0);
257 gst_video_frame_unmap (&gl_frame);
258
259 gst_gl_context_activate (context, FALSE);
260
261 this->priv->result = ret;
262 this->priv->updated = TRUE;
263 g_cond_signal (&this->priv->update_cond);
264 g_mutex_unlock (&this->priv->lock);
265 }
266
267 void
aboutToQuit()268 QtGLWindow::aboutToQuit()
269 {
270 g_mutex_lock (&this->priv->lock);
271
272 this->priv->updated = TRUE;
273 this->priv->quit = TRUE;
274 g_cond_signal (&this->priv->update_cond);
275
276 this->priv->stop = QDateTime::currentDateTime().toMSecsSinceEpoch();
277 qint64 duration = this->priv->stop - this->priv->start;
278 float fps = ((float)this->priv->frames_rendered / duration * 1000);
279
280 GST_DEBUG("about to quit, total refresh frames (%lld) in (%0.3f) seconds, fps: %0.3f",
281 this->priv->frames_rendered, (float)duration / 1000, fps);
282
283 g_mutex_unlock (&this->priv->lock);
284 }
285
286 void
onSceneGraphInitialized()287 QtGLWindow::onSceneGraphInitialized()
288 {
289 GST_DEBUG ("scene graph initialization with Qt GL context %p",
290 this->source->openglContext ());
291
292 this->priv->initted = gst_qt_get_gl_wrapcontext (this->priv->display,
293 &this->priv->other_context, NULL);
294
295 if (this->priv->initted && this->priv->other_context) {
296 const GstGLFuncs *gl;
297
298 gst_gl_context_activate (this->priv->other_context, TRUE);
299 gl = this->priv->other_context->gl_vtable;
300
301 gl->GenFramebuffers (1, &this->priv->fbo);
302
303 gst_gl_context_activate (this->priv->other_context, FALSE);
304 }
305
306 GST_DEBUG ("%p created wrapped GL context %" GST_PTR_FORMAT, this,
307 this->priv->other_context);
308 }
309
310 void
onSceneGraphInvalidated()311 QtGLWindow::onSceneGraphInvalidated()
312 {
313 GST_DEBUG ("scene graph invalidated");
314
315 if (this->priv->fbo && this->priv->other_context) {
316 const GstGLFuncs *gl;
317
318 gst_gl_context_activate (this->priv->other_context, TRUE);
319 gl = this->priv->other_context->gl_vtable;
320
321 gl->DeleteFramebuffers (1, &this->priv->fbo);
322
323 gst_gl_context_activate (this->priv->other_context, FALSE);
324 }
325 }
326
327 bool
getGeometry(int * width,int * height)328 QtGLWindow::getGeometry(int * width, int * height)
329 {
330 if (width == NULL || height == NULL)
331 return FALSE;
332
333 *width = this->source->width();
334 *height = this->source->height();
335
336 return TRUE;
337 }
338
339 GstGLContext *
qt_window_get_qt_context(QtGLWindow * qt_window)340 qt_window_get_qt_context (QtGLWindow * qt_window)
341 {
342 g_return_val_if_fail (qt_window != NULL, NULL);
343
344 if (!qt_window->priv->other_context)
345 return NULL;
346
347 return (GstGLContext *) gst_object_ref (qt_window->priv->other_context);
348 }
349
350 GstGLDisplay *
qt_window_get_display(QtGLWindow * qt_window)351 qt_window_get_display (QtGLWindow * qt_window)
352 {
353 g_return_val_if_fail (qt_window != NULL, NULL);
354
355 if (!qt_window->priv->display)
356 return NULL;
357
358 return (GstGLDisplay *) gst_object_ref (qt_window->priv->display);
359 }
360
361 gboolean
qt_window_is_scenegraph_initialized(QtGLWindow * qt_window)362 qt_window_is_scenegraph_initialized (QtGLWindow * qt_window)
363 {
364 g_return_val_if_fail (qt_window != NULL, FALSE);
365
366 return qt_window->priv->initted;
367 }
368
369 gboolean
qt_window_set_caps(QtGLWindow * qt_window,GstCaps * caps)370 qt_window_set_caps (QtGLWindow * qt_window, GstCaps * caps)
371 {
372 GstVideoInfo v_info;
373
374 g_return_val_if_fail (qt_window != NULL, FALSE);
375 g_return_val_if_fail (GST_IS_CAPS (caps), FALSE);
376 g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
377
378 if (qt_window->priv->caps && gst_caps_is_equal_fixed (qt_window->priv->caps, caps))
379 return TRUE;
380
381 if (!gst_video_info_from_caps (&v_info, caps))
382 return FALSE;
383
384 g_mutex_lock (&qt_window->priv->lock);
385
386 gst_caps_replace (&qt_window->priv->caps, caps);
387
388 qt_window->priv->v_info = v_info;
389
390 g_mutex_unlock (&qt_window->priv->lock);
391
392 return TRUE;
393 }
394
395 gboolean
qt_window_set_buffer(QtGLWindow * qt_window,GstBuffer * buffer)396 qt_window_set_buffer (QtGLWindow * qt_window, GstBuffer * buffer)
397 {
398 g_return_val_if_fail (qt_window != NULL, FALSE);
399 g_return_val_if_fail (qt_window->priv->initted, FALSE);
400 gboolean ret;
401
402 g_mutex_lock (&qt_window->priv->lock);
403
404 if (qt_window->priv->quit){
405 GST_DEBUG("about to quit, drop this buffer");
406 g_mutex_unlock (&qt_window->priv->lock);
407 return TRUE;
408 }
409
410 qt_window->priv->updated = FALSE;
411 qt_window->priv->buffer = buffer;
412
413 while (!qt_window->priv->updated)
414 g_cond_wait (&qt_window->priv->update_cond, &qt_window->priv->lock);
415
416 ret = qt_window->priv->result;
417
418 g_mutex_unlock (&qt_window->priv->lock);
419
420 return ret;
421 }
422
423 void
qt_window_use_default_fbo(QtGLWindow * qt_window,gboolean useDefaultFbo)424 qt_window_use_default_fbo (QtGLWindow * qt_window, gboolean useDefaultFbo)
425 {
426 g_return_if_fail (qt_window != NULL);
427
428 g_mutex_lock (&qt_window->priv->lock);
429
430 GST_DEBUG ("set to use default fbo %d", useDefaultFbo);
431 qt_window->priv->useDefaultFbo = useDefaultFbo;
432
433 g_mutex_unlock (&qt_window->priv->lock);
434 }
435