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.
22 * SECTION:element-caopengllayersink
24 * caopengllayersink renders incoming video frames to CAOpenGLLayer that
25 * can be retreived through the layer property and placed in the Core
26 * Animation render tree.
33 #include "caopengllayersink.h"
34 #include <QuartzCore/QuartzCore.h>
36 GST_DEBUG_CATEGORY (gst_debug_ca_sink);
37 #define GST_CAT_DEFAULT gst_debug_ca_sink
39 #define GST_CA_OPENGL_LAYER_SINK_GET_LOCK(glsink) \
40 (GST_CA_OPENGL_LAYER_SINK(glsink)->drawing_lock)
41 #define GST_CA_OPENGL_LAYER_SINK_LOCK(glsink) \
42 (g_mutex_lock(&GST_CA_OPENGL_LAYER_SINK_GET_LOCK (glsink)))
43 #define GST_CA_OPENGL_LAYER_SINK_UNLOCK(glsink) \
44 (g_mutex_unlock(&GST_CA_OPENGL_LAYER_SINK_GET_LOCK (glsink)))
46 #define USING_OPENGL(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 1, 0))
47 #define USING_OPENGL3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 1))
48 #define USING_GLES(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES, 1, 0))
49 #define USING_GLES2(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 2, 0))
50 #define USING_GLES3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3, 0))
52 #define SUPPORTED_GL_APIS GST_GL_API_OPENGL | GST_GL_API_GLES2 | GST_GL_API_OPENGL3
54 static void gst_ca_opengl_layer_sink_thread_init_redisplay (GstCAOpenGLLayerSink * ca_sink);
55 static void gst_ca_opengl_layer_sink_cleanup_glthread (GstCAOpenGLLayerSink * ca_sink);
56 static void gst_ca_opengl_layer_sink_on_resize (GstCAOpenGLLayerSink * ca_sink,
57 gint width, gint height);
58 static void gst_ca_opengl_layer_sink_on_draw (GstCAOpenGLLayerSink * ca_sink);
60 static void gst_ca_opengl_layer_sink_finalize (GObject * object);
61 static void gst_ca_opengl_layer_sink_set_property (GObject * object, guint prop_id,
62 const GValue * value, GParamSpec * param_spec);
63 static void gst_ca_opengl_layer_sink_get_property (GObject * object, guint prop_id,
64 GValue * value, GParamSpec * param_spec);
66 static gboolean gst_ca_opengl_layer_sink_stop (GstBaseSink * bsink);
68 static gboolean gst_ca_opengl_layer_sink_query (GstBaseSink * bsink, GstQuery * query);
69 static void gst_ca_opengl_layer_sink_set_context (GstElement * element,
70 GstContext * context);
72 static GstStateChangeReturn gst_ca_opengl_layer_sink_change_state (GstElement *
73 element, GstStateChange transition);
75 static void gst_ca_opengl_layer_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
76 GstClockTime * start, GstClockTime * end);
77 static gboolean gst_ca_opengl_layer_sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
78 static GstFlowReturn gst_ca_opengl_layer_sink_prepare (GstBaseSink * bsink,
80 static GstFlowReturn gst_ca_opengl_layer_sink_show_frame (GstVideoSink * bsink,
82 static gboolean gst_ca_opengl_layer_sink_propose_allocation (GstBaseSink * bsink,
85 static GstStaticPadTemplate gst_ca_opengl_layer_sink_template =
86 GST_STATIC_PAD_TEMPLATE ("sink",
89 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
90 (GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
92 GST_VIDEO_CAPS_MAKE_WITH_FEATURES
93 (GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
94 "RGBA") "; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
100 PROP_FORCE_ASPECT_RATIO,
105 #define gst_ca_opengl_layer_sink_parent_class parent_class
106 G_DEFINE_TYPE_WITH_CODE (GstCAOpenGLLayerSink, gst_ca_opengl_layer_sink,
107 GST_TYPE_VIDEO_SINK, GST_DEBUG_CATEGORY_INIT (gst_debug_ca_sink,
108 "caopengllayersink", 0, "CAOpenGLLayer Video Sink"));
111 gst_ca_opengl_layer_sink_class_init (GstCAOpenGLLayerSinkClass * klass)
113 GObjectClass *gobject_class;
114 GstElementClass *gstelement_class;
115 GstBaseSinkClass *gstbasesink_class;
116 GstVideoSinkClass *gstvideosink_class;
117 GstElementClass *element_class;
119 gobject_class = (GObjectClass *) klass;
120 gstelement_class = (GstElementClass *) klass;
121 gstbasesink_class = (GstBaseSinkClass *) klass;
122 gstvideosink_class = (GstVideoSinkClass *) klass;
123 element_class = GST_ELEMENT_CLASS (klass);
125 gobject_class->set_property = gst_ca_opengl_layer_sink_set_property;
126 gobject_class->get_property = gst_ca_opengl_layer_sink_get_property;
128 g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
129 g_param_spec_boolean ("force-aspect-ratio",
130 "Force aspect ratio",
131 "When enabled, scaling will respect original aspect ratio", TRUE,
132 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
134 g_object_class_install_property (gobject_class, PROP_CONTEXT,
135 g_param_spec_object ("context",
137 "Get OpenGL context",
138 GST_GL_TYPE_CONTEXT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
140 g_object_class_install_property (gobject_class, PROP_LAYER,
141 g_param_spec_pointer ("layer", "CAOpenGLLayer",
142 "OpenGL Core Animation layer",
143 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
145 gst_element_class_set_metadata (element_class, "CAOpenGLLayer video sink",
146 "Sink/Video", "A video sink based on CAOpenGLLayer",
147 "Matthew Waters <matthew@centricular.com>");
149 gst_element_class_add_pad_template (element_class,
150 gst_static_pad_template_get (&gst_ca_opengl_layer_sink_template));
152 gobject_class->finalize = gst_ca_opengl_layer_sink_finalize;
154 gstelement_class->change_state = gst_ca_opengl_layer_sink_change_state;
155 gstelement_class->set_context = gst_ca_opengl_layer_sink_set_context;
156 gstbasesink_class->query = GST_DEBUG_FUNCPTR (gst_ca_opengl_layer_sink_query);
157 gstbasesink_class->set_caps = gst_ca_opengl_layer_sink_set_caps;
158 gstbasesink_class->get_times = gst_ca_opengl_layer_sink_get_times;
159 gstbasesink_class->prepare = gst_ca_opengl_layer_sink_prepare;
160 gstbasesink_class->propose_allocation = gst_ca_opengl_layer_sink_propose_allocation;
161 gstbasesink_class->stop = gst_ca_opengl_layer_sink_stop;
163 gstvideosink_class->show_frame =
164 GST_DEBUG_FUNCPTR (gst_ca_opengl_layer_sink_show_frame);
168 gst_ca_opengl_layer_sink_init (GstCAOpenGLLayerSink * ca_sink)
170 ca_sink->display = NULL;
171 ca_sink->keep_aspect_ratio = TRUE;
172 ca_sink->pool = NULL;
173 ca_sink->stored_buffer = NULL;
174 ca_sink->redisplay_texture = 0;
176 g_mutex_init (&ca_sink->drawing_lock);
180 gst_ca_opengl_layer_sink_finalize (GObject * object)
182 GstCAOpenGLLayerSink *ca_sink;
184 g_return_if_fail (GST_IS_CA_OPENGL_LAYER_SINK (object));
186 ca_sink = GST_CA_OPENGL_LAYER_SINK (object);
188 g_mutex_clear (&ca_sink->drawing_lock);
190 GST_DEBUG ("finalized");
191 G_OBJECT_CLASS (parent_class)->finalize (object);
195 gst_ca_opengl_layer_sink_set_property (GObject * object, guint prop_id,
196 const GValue * value, GParamSpec * pspec)
198 GstCAOpenGLLayerSink *ca_sink;
200 g_return_if_fail (GST_IS_CA_OPENGL_LAYER_SINK (object));
202 ca_sink = GST_CA_OPENGL_LAYER_SINK (object);
205 case PROP_FORCE_ASPECT_RATIO:
207 ca_sink->keep_aspect_ratio = g_value_get_boolean (value);
211 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
217 gst_ca_opengl_layer_sink_get_property (GObject * object, guint prop_id,
218 GValue * value, GParamSpec * pspec)
220 GstCAOpenGLLayerSink *ca_sink;
222 g_return_if_fail (GST_IS_CA_OPENGL_LAYER_SINK (object));
224 ca_sink = GST_CA_OPENGL_LAYER_SINK (object);
227 case PROP_FORCE_ASPECT_RATIO:
228 g_value_set_boolean (value, ca_sink->keep_aspect_ratio);
231 g_value_set_object (value, ca_sink->context);
234 g_value_set_pointer (value, ca_sink->layer);
237 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
243 _create_layer (gpointer data)
245 GstCAOpenGLLayerSink *ca_sink = data;
247 if (!ca_sink->layer) {
248 ca_sink->layer = [[NSClassFromString(@"GstGLCAOpenGLLayer") alloc]
249 initWithGstGLContext:GST_GL_CONTEXT_COCOA (ca_sink->context)];
250 [ca_sink->layer setDrawCallback:(GstGLWindowCB)gst_ca_opengl_layer_sink_on_draw
251 data:ca_sink notify:NULL];
252 [ca_sink->layer setResizeCallback:(GstGLWindowResizeCB)gst_ca_opengl_layer_sink_on_resize
253 data:ca_sink notify:NULL];
254 g_object_notify (G_OBJECT (ca_sink), "layer");
259 _invoke_on_main (GstGLWindowCB func, gpointer data)
261 if ([NSThread isMainThread]) {
264 dispatch_sync (dispatch_get_main_queue (), ^{
271 _ensure_gl_setup (GstCAOpenGLLayerSink * ca_sink)
273 GError *error = NULL;
275 if (!gst_gl_ensure_element_data (ca_sink, &ca_sink->display,
276 &ca_sink->other_context))
279 gst_gl_display_filter_gl_api (ca_sink->display, SUPPORTED_GL_APIS);
281 if (!ca_sink->context) {
282 ca_sink->context = gst_gl_context_new (ca_sink->display);
283 if (!ca_sink->context)
284 goto context_creation_error;
286 if (!gst_gl_context_create (ca_sink->context, ca_sink->other_context,
293 _invoke_on_main ((GstGLWindowCB) _create_layer, ca_sink);
297 context_creation_error:
299 GST_ELEMENT_ERROR (ca_sink, RESOURCE, NOT_FOUND,
300 ("Failed to create GL context"), (NULL));
306 GST_ELEMENT_ERROR (ca_sink, RESOURCE, NOT_FOUND, ("%s", error->message),
308 gst_object_unref (ca_sink->context);
309 ca_sink->context = NULL;
315 gst_ca_opengl_layer_sink_query (GstBaseSink * bsink, GstQuery * query)
317 GstCAOpenGLLayerSink *ca_sink = GST_CA_OPENGL_LAYER_SINK (bsink);
318 gboolean res = FALSE;
320 switch (GST_QUERY_TYPE (query)) {
321 case GST_QUERY_CONTEXT:
324 gst_gl_handle_context_query ((GstElement *) ca_sink, query,
325 &ca_sink->display, &ca_sink->other_context);
326 if (ca_sink->display)
327 gst_gl_display_filter_gl_api (ca_sink->display, SUPPORTED_GL_APIS);
330 case GST_QUERY_DRAIN:
332 GstBuffer *buf = NULL;
334 GST_CA_OPENGL_LAYER_SINK_LOCK (ca_sink);
335 ca_sink->redisplay_texture = 0;
336 buf = ca_sink->stored_buffer;
337 ca_sink->stored_buffer = NULL;
338 GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);
341 gst_buffer_unref (buf);
343 gst_buffer_replace (&ca_sink->next_buffer, NULL);
344 gst_gl_upload_release_buffer (ca_sink->upload);
346 res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
350 res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
358 gst_ca_opengl_layer_sink_stop (GstBaseSink * bsink)
360 GstCAOpenGLLayerSink *ca_sink = GST_CA_OPENGL_LAYER_SINK (bsink);
363 gst_object_unref (ca_sink->pool);
364 ca_sink->pool = NULL;
367 if (ca_sink->gl_caps) {
368 gst_caps_unref (ca_sink->gl_caps);
369 ca_sink->gl_caps = NULL;
376 gst_ca_opengl_layer_sink_set_context (GstElement * element, GstContext * context)
378 GstCAOpenGLLayerSink *ca_sink = GST_CA_OPENGL_LAYER_SINK (element);
380 gst_gl_handle_set_context (element, context, &ca_sink->display,
381 &ca_sink->other_context);
383 if (ca_sink->display)
384 gst_gl_display_filter_gl_api (ca_sink->display, SUPPORTED_GL_APIS);
387 static GstStateChangeReturn
388 gst_ca_opengl_layer_sink_change_state (GstElement * element, GstStateChange transition)
390 GstCAOpenGLLayerSink *ca_sink;
391 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
393 GST_DEBUG ("changing state: %s => %s",
394 gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
395 gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
397 ca_sink = GST_CA_OPENGL_LAYER_SINK (element);
399 switch (transition) {
400 case GST_STATE_CHANGE_NULL_TO_READY:
401 _ensure_gl_setup (ca_sink);
403 case GST_STATE_CHANGE_READY_TO_PAUSED:
404 g_atomic_int_set (&ca_sink->to_quit, 0);
406 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
412 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
413 if (ret == GST_STATE_CHANGE_FAILURE)
416 switch (transition) {
417 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
419 case GST_STATE_CHANGE_PAUSED_TO_READY:
421 /* mark the redisplay_texture as unavailable (=0)
424 GST_CA_OPENGL_LAYER_SINK_LOCK (ca_sink);
425 ca_sink->redisplay_texture = 0;
426 if (ca_sink->stored_buffer) {
427 gst_buffer_unref (ca_sink->stored_buffer);
428 ca_sink->stored_buffer = NULL;
430 GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);
431 gst_buffer_replace (&ca_sink->next_buffer, NULL);
433 if (ca_sink->upload) {
434 gst_object_unref (ca_sink->upload);
435 ca_sink->upload = NULL;
438 if (ca_sink->convert) {
439 gst_object_unref (ca_sink->convert);
440 ca_sink->convert = NULL;
444 gst_buffer_pool_set_active (ca_sink->pool, FALSE);
445 gst_object_unref (ca_sink->pool);
446 ca_sink->pool = NULL;
449 GST_VIDEO_SINK_WIDTH (ca_sink) = 1;
450 GST_VIDEO_SINK_HEIGHT (ca_sink) = 1;
451 if (ca_sink->context) {
452 gst_object_unref (ca_sink->context);
453 ca_sink->context = NULL;
456 if (ca_sink->display) {
457 gst_object_unref (ca_sink->display);
458 ca_sink->display = NULL;
462 case GST_STATE_CHANGE_READY_TO_NULL:
472 gst_ca_opengl_layer_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
473 GstClockTime * start, GstClockTime * end)
475 GstCAOpenGLLayerSink *ca_sink;
477 ca_sink = GST_CA_OPENGL_LAYER_SINK (bsink);
479 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
480 *start = GST_BUFFER_TIMESTAMP (buf);
481 if (GST_BUFFER_DURATION_IS_VALID (buf))
482 *end = *start + GST_BUFFER_DURATION (buf);
484 if (GST_VIDEO_INFO_FPS_N (&ca_sink->info) > 0) {
486 gst_util_uint64_scale_int (GST_SECOND,
487 GST_VIDEO_INFO_FPS_D (&ca_sink->info),
488 GST_VIDEO_INFO_FPS_N (&ca_sink->info));
495 gst_ca_opengl_layer_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
497 GstCAOpenGLLayerSink *ca_sink;
502 gint display_par_n, display_par_d;
503 guint display_ratio_num, display_ratio_den;
505 GstStructure *structure;
506 GstBufferPool *newpool, *oldpool;
507 GstCapsFeatures *gl_features;
508 GstCaps *uploaded_caps;
510 GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
512 ca_sink = GST_CA_OPENGL_LAYER_SINK (bsink);
514 ok = gst_video_info_from_caps (&vinfo, caps);
518 width = GST_VIDEO_INFO_WIDTH (&vinfo);
519 height = GST_VIDEO_INFO_HEIGHT (&vinfo);
521 par_n = GST_VIDEO_INFO_PAR_N (&vinfo);
522 par_d = GST_VIDEO_INFO_PAR_D (&vinfo);
530 ok = gst_video_calculate_display_ratio (&display_ratio_num,
531 &display_ratio_den, width, height, par_n, par_d, display_par_n,
537 GST_TRACE ("PAR: %u/%u DAR:%u/%u", par_n, par_d, display_par_n,
540 if (height % display_ratio_den == 0) {
541 GST_DEBUG ("keeping video height");
542 GST_VIDEO_SINK_WIDTH (ca_sink) = (guint)
543 gst_util_uint64_scale_int (height, display_ratio_num,
545 GST_VIDEO_SINK_HEIGHT (ca_sink) = height;
546 } else if (width % display_ratio_num == 0) {
547 GST_DEBUG ("keeping video width");
548 GST_VIDEO_SINK_WIDTH (ca_sink) = width;
549 GST_VIDEO_SINK_HEIGHT (ca_sink) = (guint)
550 gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num);
552 GST_DEBUG ("approximating while keeping video height");
553 GST_VIDEO_SINK_WIDTH (ca_sink) = (guint)
554 gst_util_uint64_scale_int (height, display_ratio_num,
556 GST_VIDEO_SINK_HEIGHT (ca_sink) = height;
558 GST_DEBUG ("scaling to %dx%d", GST_VIDEO_SINK_WIDTH (ca_sink),
559 GST_VIDEO_SINK_HEIGHT (ca_sink));
561 ca_sink->info = vinfo;
562 if (!_ensure_gl_setup (ca_sink))
565 newpool = gst_gl_buffer_pool_new (ca_sink->context);
566 structure = gst_buffer_pool_get_config (newpool);
567 gst_buffer_pool_config_set_params (structure, caps, vinfo.size, 2, 0);
568 gst_buffer_pool_set_config (newpool, structure);
570 oldpool = ca_sink->pool;
571 /* we don't activate the pool yet, this will be done by downstream after it
572 * has configured the pool. If downstream does not want our pool we will
573 * activate it when we render into it */
574 ca_sink->pool = newpool;
576 /* unref the old sink */
578 /* we don't deactivate, some elements might still be using it, it will
579 * be deactivated when the last ref is gone */
580 gst_object_unref (oldpool);
584 gst_object_unref (ca_sink->upload);
585 ca_sink->upload = gst_gl_upload_new (ca_sink->context);
588 gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
590 uploaded_caps = gst_caps_copy (caps);
591 gst_caps_set_features (uploaded_caps, 0,
592 gst_caps_features_copy (gl_features));
593 gst_gl_upload_set_caps (ca_sink->upload, caps, uploaded_caps);
595 if (ca_sink->gl_caps)
596 gst_caps_unref (ca_sink->gl_caps);
597 ca_sink->gl_caps = gst_caps_copy (caps);
598 gst_caps_set_simple (ca_sink->gl_caps, "format", G_TYPE_STRING, "RGBA",
600 gst_caps_set_features (ca_sink->gl_caps, 0,
601 gst_caps_features_copy (gl_features));
603 if (ca_sink->convert)
604 gst_object_unref (ca_sink->convert);
605 ca_sink->convert = gst_gl_color_convert_new (ca_sink->context);
606 if (!gst_gl_color_convert_set_caps (ca_sink->convert, uploaded_caps,
608 gst_caps_unref (uploaded_caps);
609 gst_caps_features_free (gl_features);
612 gst_caps_unref (uploaded_caps);
613 gst_caps_features_free (gl_features);
615 ca_sink->caps_change = TRUE;
621 gst_ca_opengl_layer_sink_prepare (GstBaseSink * bsink, GstBuffer * buf)
623 GstCAOpenGLLayerSink *ca_sink;
624 GstBuffer *uploaded_buffer, *next_buffer = NULL;
625 GstVideoFrame gl_frame;
626 GstVideoInfo gl_info;
628 ca_sink = GST_CA_OPENGL_LAYER_SINK (bsink);
630 GST_TRACE ("preparing buffer:%p", buf);
632 if (GST_VIDEO_SINK_WIDTH (ca_sink) < 1 ||
633 GST_VIDEO_SINK_HEIGHT (ca_sink) < 1) {
634 return GST_FLOW_NOT_NEGOTIATED;
637 if (!_ensure_gl_setup (ca_sink))
638 return GST_FLOW_NOT_NEGOTIATED;
640 if (gst_gl_upload_perform_with_buffer (ca_sink->upload, buf,
641 &uploaded_buffer) != GST_GL_UPLOAD_DONE)
645 gst_gl_color_convert_perform (ca_sink->convert,
647 gst_buffer_unref (uploaded_buffer);
651 gst_video_info_from_caps (&gl_info, ca_sink->gl_caps);
653 if (!gst_video_frame_map (&gl_frame, &gl_info, next_buffer,
654 GST_MAP_READ | GST_MAP_GL)) {
655 gst_buffer_unref (uploaded_buffer);
656 gst_buffer_unref (next_buffer);
659 gst_buffer_unref (uploaded_buffer);
661 ca_sink->next_tex = *(guint *) gl_frame.data[0];
663 gst_buffer_replace (&ca_sink->next_buffer, next_buffer);
664 gst_buffer_unref (next_buffer);
666 gst_video_frame_unmap (&gl_frame);
672 GST_ELEMENT_ERROR (ca_sink, RESOURCE, NOT_FOUND,
673 ("%s", "Failed to upload buffer"), (NULL));
674 return GST_FLOW_ERROR;
679 gst_ca_opengl_layer_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
681 GstCAOpenGLLayerSink *ca_sink;
682 GstBuffer *stored_buffer;
684 GST_TRACE ("rendering buffer:%p", buf);
686 ca_sink = GST_CA_OPENGL_LAYER_SINK (vsink);
688 GST_TRACE ("redisplay texture:%u of size:%ux%u, window size:%ux%u",
689 ca_sink->next_tex, GST_VIDEO_INFO_WIDTH (&ca_sink->info),
690 GST_VIDEO_INFO_HEIGHT (&ca_sink->info),
691 GST_VIDEO_SINK_WIDTH (ca_sink),
692 GST_VIDEO_SINK_HEIGHT (ca_sink));
694 /* Avoid to release the texture while drawing */
695 GST_CA_OPENGL_LAYER_SINK_LOCK (ca_sink);
696 ca_sink->redisplay_texture = ca_sink->next_tex;
697 stored_buffer = ca_sink->stored_buffer;
698 ca_sink->stored_buffer = gst_buffer_ref (ca_sink->next_buffer);
699 GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);
701 /* The layer will automatically call the draw callback to draw the new
703 [CATransaction begin];
704 [ca_sink->layer setNeedsDisplay];
705 [CATransaction commit];
707 GST_TRACE ("post redisplay");
710 gst_buffer_unref (stored_buffer);
712 if (g_atomic_int_get (&ca_sink->to_quit) != 0) {
713 GST_ELEMENT_ERROR (ca_sink, RESOURCE, NOT_FOUND,
714 ("%s", gst_gl_context_get_error ()), (NULL));
715 gst_gl_upload_release_buffer (ca_sink->upload);
716 return GST_FLOW_ERROR;
723 gst_ca_opengl_layer_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
725 GstCAOpenGLLayerSink *ca_sink = GST_CA_OPENGL_LAYER_SINK (bsink);
727 GstStructure *config;
731 GstStructure *gl_context;
732 gchar *platform, *gl_apis;
734 GstAllocator *allocator = NULL;
735 GstAllocationParams params;
737 if (!_ensure_gl_setup (ca_sink))
740 gst_query_parse_allocation (query, &caps, &need_pool);
745 if ((pool = ca_sink->pool))
746 gst_object_ref (pool);
751 /* we had a pool, check caps */
752 GST_DEBUG_OBJECT (ca_sink, "check existing pool caps");
753 config = gst_buffer_pool_get_config (pool);
754 gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
756 if (!gst_caps_is_equal (caps, pcaps)) {
757 GST_DEBUG_OBJECT (ca_sink, "pool has different caps");
758 /* different caps, we can't use this pool */
759 gst_object_unref (pool);
762 gst_structure_free (config);
765 if (pool == NULL && need_pool) {
768 if (!gst_video_info_from_caps (&info, caps))
771 GST_DEBUG_OBJECT (ca_sink, "create new pool");
772 pool = gst_gl_buffer_pool_new (ca_sink->context);
774 /* the normal size of a frame */
777 config = gst_buffer_pool_get_config (pool);
778 gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
779 if (!gst_buffer_pool_set_config (pool, config))
782 /* we need at least 2 buffer because we hold on to the last one */
784 gst_query_add_allocation_pool (query, pool, size, 2, 0);
785 gst_object_unref (pool);
788 /* we also support various metadata */
789 gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, 0);
790 if (ca_sink->context->gl_vtable->FenceSync)
791 gst_query_add_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, 0);
794 gst_gl_api_to_string (gst_gl_context_get_gl_api (ca_sink->context));
796 gst_gl_platform_to_string (gst_gl_context_get_gl_platform
798 handle = (gpointer) gst_gl_context_get_gl_context (ca_sink->context);
801 gst_structure_new ("GstVideoGLTextureUploadMeta", "gst.gl.GstGLContext",
802 GST_GL_TYPE_CONTEXT, ca_sink->context, "gst.gl.context.handle",
803 G_TYPE_POINTER, handle, "gst.gl.context.type", G_TYPE_STRING, platform,
804 "gst.gl.context.apis", G_TYPE_STRING, gl_apis, NULL);
805 gst_query_add_allocation_meta (query,
806 GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, gl_context);
810 gst_structure_free (gl_context);
812 gst_allocation_params_init (¶ms);
814 allocator = gst_allocator_find (GST_GL_MEMORY_ALLOCATOR);
815 gst_query_add_allocation_param (query, allocator, ¶ms);
816 gst_object_unref (allocator);
823 GST_DEBUG_OBJECT (bsink, "no caps specified");
828 GST_DEBUG_OBJECT (bsink, "invalid caps specified");
833 GST_DEBUG_OBJECT (bsink, "failed setting config");
839 static const GLfloat vertices[] = {
840 1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
841 -1.0f, 1.0f, 0.0f, 0.0f, 0.0f,
842 -1.0f, -1.0f, 0.0f, 0.0f, 1.0f,
843 1.0f, -1.0f, 0.0f, 1.0f, 1.0f
848 _bind_buffer (GstCAOpenGLLayerSink * ca_sink)
850 const GstGLFuncs *gl = ca_sink->context->gl_vtable;
852 gl->BindBuffer (GL_ARRAY_BUFFER, ca_sink->vertex_buffer);
853 gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), vertices,
856 /* Load the vertex position */
857 gl->VertexAttribPointer (ca_sink->attr_position, 3, GL_FLOAT, GL_FALSE,
858 5 * sizeof (GLfloat), (void *) 0);
860 /* Load the texture coordinate */
861 gl->VertexAttribPointer (ca_sink->attr_texture, 2, GL_FLOAT, GL_FALSE,
862 5 * sizeof (GLfloat), (void *) (3 * sizeof (GLfloat)));
864 gl->EnableVertexAttribArray (ca_sink->attr_position);
865 gl->EnableVertexAttribArray (ca_sink->attr_texture);
869 _unbind_buffer (GstCAOpenGLLayerSink * ca_sink)
871 const GstGLFuncs *gl = ca_sink->context->gl_vtable;
873 gl->BindBuffer (GL_ARRAY_BUFFER, 0);
875 gl->DisableVertexAttribArray (ca_sink->attr_position);
876 gl->DisableVertexAttribArray (ca_sink->attr_texture);
879 /* Called in the gl thread */
881 gst_ca_opengl_layer_sink_thread_init_redisplay (GstCAOpenGLLayerSink * ca_sink)
883 const GstGLFuncs *gl = ca_sink->context->gl_vtable;
885 ca_sink->redisplay_shader = gst_gl_shader_new (ca_sink->context);
887 if (!gst_gl_shader_compile_with_default_vf_and_check
888 (ca_sink->redisplay_shader, &ca_sink->attr_position,
889 &ca_sink->attr_texture))
890 gst_ca_opengl_layer_sink_cleanup_glthread (ca_sink);
892 if (gl->GenVertexArrays) {
893 gl->GenVertexArrays (1, &ca_sink->vao);
894 gl->BindVertexArray (ca_sink->vao);
897 gl->GenBuffers (1, &ca_sink->vertex_buffer);
898 _bind_buffer (ca_sink);
900 if (gl->GenVertexArrays) {
901 gl->BindVertexArray (0);
902 gl->BindBuffer (GL_ARRAY_BUFFER, 0);
904 _unbind_buffer (ca_sink);
909 gst_ca_opengl_layer_sink_cleanup_glthread (GstCAOpenGLLayerSink * ca_sink)
911 const GstGLFuncs *gl = ca_sink->context->gl_vtable;
913 if (ca_sink->redisplay_shader) {
914 gst_object_unref (ca_sink->redisplay_shader);
915 ca_sink->redisplay_shader = NULL;
919 gl->DeleteVertexArrays (1, &ca_sink->vao);
925 gst_ca_opengl_layer_sink_on_resize (GstCAOpenGLLayerSink * ca_sink, gint width, gint height)
927 /* Here ca_sink members (ex:ca_sink->info) have a life time of set_caps.
928 * It means that they cannot not change between two set_caps
930 const GstGLFuncs *gl = ca_sink->context->gl_vtable;
932 GST_TRACE ("GL Window resized to %ux%u", width, height);
934 width = MAX (1, width);
935 height = MAX (1, height);
937 ca_sink->window_width = width;
938 ca_sink->window_height = height;
940 /* default reshape */
941 if (ca_sink->keep_aspect_ratio) {
942 GstVideoRectangle src, dst, result;
946 src.w = GST_VIDEO_SINK_WIDTH (ca_sink);
947 src.h = GST_VIDEO_SINK_HEIGHT (ca_sink);
954 gst_video_sink_center_rect (src, dst, &result, TRUE);
955 gl->Viewport (result.x, result.y, result.w, result.h);
957 gl->Viewport (0, 0, width, height);
962 gst_ca_opengl_layer_sink_on_draw (GstCAOpenGLLayerSink * ca_sink)
964 /* Here ca_sink members (ex:ca_sink->info) have a life time of set_caps.
965 * It means that they cannot not change between two set_caps as well as
966 * for the redisplay_texture size.
967 * Whereas redisplay_texture id changes every sink_render
970 const GstGLFuncs *gl = NULL;
971 GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
973 g_return_if_fail (GST_IS_CA_OPENGL_LAYER_SINK (ca_sink));
975 gl = ca_sink->context->gl_vtable;
977 GST_CA_OPENGL_LAYER_SINK_LOCK (ca_sink);
979 if (G_UNLIKELY (!ca_sink->redisplay_shader)) {
980 gst_ca_opengl_layer_sink_thread_init_redisplay (ca_sink);
983 /* check if texture is ready for being drawn */
984 if (!ca_sink->redisplay_texture) {
985 gl->ClearColor (0.0f, 0.0f, 0.0f, 1.0f);
986 gl->Clear (GL_COLOR_BUFFER_BIT);
987 GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);
992 GST_TRACE ("redrawing texture:%u", ca_sink->redisplay_texture);
994 if (ca_sink->caps_change) {
995 GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);
996 gst_ca_opengl_layer_sink_on_resize (ca_sink, ca_sink->window_width,
997 ca_sink->window_height);
998 GST_CA_OPENGL_LAYER_SINK_LOCK (ca_sink);
999 ca_sink->caps_change = TRUE;
1002 #if GST_GL_HAVE_OPENGL
1003 if (USING_OPENGL (ca_sink->context))
1004 gl->Disable (GL_TEXTURE_2D);
1007 gl->BindTexture (GL_TEXTURE_2D, 0);
1009 gl->ClearColor (0.0, 0.0, 0.0, 0.0);
1010 gl->Clear (GL_COLOR_BUFFER_BIT);
1012 gst_gl_shader_use (ca_sink->redisplay_shader);
1014 if (gl->GenVertexArrays)
1015 gl->BindVertexArray (ca_sink->vao);
1017 _bind_buffer (ca_sink);
1019 gl->ActiveTexture (GL_TEXTURE0);
1020 gl->BindTexture (GL_TEXTURE_2D, ca_sink->redisplay_texture);
1021 gst_gl_shader_set_uniform_1i (ca_sink->redisplay_shader, "tex", 0);
1023 gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
1025 if (gl->GenVertexArrays)
1026 gl->BindVertexArray (0);
1028 _unbind_buffer (ca_sink);
1030 /* end default opengl scene */
1031 GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);