1 /* Generic video mixer plugin
4 * Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
27 #include <gst/base/gstcollectpads.h>
28 #include <gst/video/video.h>
37 #include "gstglmixer.h"
39 #if GST_GL_HAVE_PLATFORM_EGL
40 #include <gst/gl/egl/gsteglimagememory.h>
43 #define gst_gl_mixer_parent_class parent_class
44 G_DEFINE_ABSTRACT_TYPE (GstGLMixer, gst_gl_mixer, GST_TYPE_VIDEO_AGGREGATOR);
45 static gboolean gst_gl_mixer_do_bufferpool (GstGLMixer * mix,
49 #define GST_CAT_DEFAULT gst_gl_mixer_debug
50 GST_DEBUG_CATEGORY (gst_gl_mixer_debug);
52 static void gst_gl_mixer_pad_get_property (GObject * object, guint prop_id,
53 GValue * value, GParamSpec * pspec);
54 static void gst_gl_mixer_pad_set_property (GObject * object, guint prop_id,
55 const GValue * value, GParamSpec * pspec);
56 static void gst_gl_mixer_pad_finalize (GObject * object);
58 static void gst_gl_mixer_set_context (GstElement * element,
59 GstContext * context);
66 #define GST_GL_MIXER_GET_PRIVATE(obj) \
67 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_GL_MIXER, GstGLMixerPrivate))
69 struct _GstGLMixerPrivate
75 GstAllocator *allocator;
76 GstAllocationParams params;
79 gboolean gl_resource_ready;
80 GMutex gl_resource_lock;
81 GCond gl_resource_cond;
84 G_DEFINE_TYPE (GstGLMixerPad, gst_gl_mixer_pad, GST_TYPE_VIDEO_AGGREGATOR_PAD);
87 gst_gl_mixer_pad_class_init (GstGLMixerPadClass * klass)
89 GObjectClass *gobject_class = (GObjectClass *) klass;
90 GstVideoAggregatorPadClass *vaggpad_class =
91 (GstVideoAggregatorPadClass *) klass;
93 gobject_class->set_property = gst_gl_mixer_pad_set_property;
94 gobject_class->get_property = gst_gl_mixer_pad_get_property;
96 gobject_class->finalize = gst_gl_mixer_pad_finalize;
98 vaggpad_class->set_info = NULL;
99 vaggpad_class->prepare_frame = NULL;
100 vaggpad_class->clean_frame = NULL;
104 gst_gl_mixer_pad_finalize (GObject * object)
106 GstGLMixerPad *pad = GST_GL_MIXER_PAD (object);
109 gst_object_unref (pad->upload);
113 G_OBJECT_CLASS (gst_gl_mixer_pad_parent_class)->finalize (object);
117 gst_gl_mixer_pad_get_property (GObject * object, guint prop_id,
118 GValue * value, GParamSpec * pspec)
122 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
128 gst_gl_mixer_pad_set_property (GObject * object, guint prop_id,
129 const GValue * value, GParamSpec * pspec)
133 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
139 _negotiated_caps (GstVideoAggregator * vagg, GstCaps * caps)
141 GstGLMixer *mix = GST_GL_MIXER (vagg);
142 gboolean ret = gst_gl_mixer_do_bufferpool (mix, caps);
144 mix->priv->negotiated = ret;
146 gst_caps_replace (&mix->out_caps, caps);
152 gst_gl_mixer_propose_allocation (GstGLMixer * mix,
153 GstQuery * decide_query, GstQuery * query)
156 GstStructure *config;
160 GError *error = NULL;
161 GstStructure *gl_context;
162 gchar *platform, *gl_apis;
164 GstAllocator *allocator = NULL;
165 GstAllocationParams params;
167 gst_query_parse_allocation (query, &caps, &need_pool);
172 if ((pool = mix->priv->pool))
173 gst_object_ref (pool);
178 /* we had a pool, check caps */
179 GST_DEBUG_OBJECT (mix, "check existing pool caps");
180 config = gst_buffer_pool_get_config (pool);
181 gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
183 if (!gst_caps_is_equal (caps, pcaps)) {
184 GST_DEBUG_OBJECT (mix, "pool has different caps");
185 /* different caps, we can't use this pool */
186 gst_object_unref (pool);
189 gst_structure_free (config);
192 if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
196 mix->context = gst_gl_context_new (mix->display);
197 if (!gst_gl_context_create (mix->context, mix->other_context, &error))
201 if (pool == NULL && need_pool) {
204 if (!gst_video_info_from_caps (&info, caps))
207 GST_DEBUG_OBJECT (mix, "create new pool");
208 pool = gst_gl_buffer_pool_new (mix->context);
210 /* the normal size of a frame */
213 config = gst_buffer_pool_get_config (pool);
214 gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
215 if (!gst_buffer_pool_set_config (pool, config))
220 gst_query_add_allocation_pool (query, pool, size, 1, 0);
221 gst_object_unref (pool);
224 /* we also support various metadata */
225 gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, 0);
227 gl_apis = gst_gl_api_to_string (gst_gl_context_get_gl_api (mix->context));
229 gst_gl_platform_to_string (gst_gl_context_get_gl_platform (mix->context));
230 handle = (gpointer) gst_gl_context_get_gl_context (mix->context);
233 gst_structure_new ("GstVideoGLTextureUploadMeta", "gst.gl.GstGLContext",
234 GST_GL_TYPE_CONTEXT, mix->context, "gst.gl.context.handle",
235 G_TYPE_POINTER, handle, "gst.gl.context.type", G_TYPE_STRING, platform,
236 "gst.gl.context.apis", G_TYPE_STRING, gl_apis, NULL);
237 gst_query_add_allocation_meta (query,
238 GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, gl_context);
242 gst_structure_free (gl_context);
244 gst_allocation_params_init (¶ms);
246 allocator = gst_allocator_find (GST_GL_MEMORY_ALLOCATOR);
247 gst_query_add_allocation_param (query, allocator, ¶ms);
248 gst_object_unref (allocator);
255 GST_DEBUG_OBJECT (mix, "no caps specified");
260 GST_DEBUG_OBJECT (mix, "invalid caps specified");
265 GST_DEBUG_OBJECT (mix, "failed setting config");
270 GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s", error->message),
277 gst_gl_mixer_pad_sink_acceptcaps (GstPad * pad, GstGLMixer * mix,
281 GstCaps *template_caps;
283 GST_DEBUG_OBJECT (pad, "try accept caps of %" GST_PTR_FORMAT, caps);
285 template_caps = gst_pad_get_pad_template_caps (pad);
286 template_caps = gst_caps_make_writable (template_caps);
288 ret = gst_caps_can_intersect (caps, template_caps);
289 GST_DEBUG_OBJECT (pad, "%saccepted caps %" GST_PTR_FORMAT,
290 (ret ? "" : "not "), caps);
291 gst_caps_unref (template_caps);
297 gst_gl_mixer_set_caps_features (const GstCaps * caps,
298 const gchar * feature_name)
300 GstCaps *tmp = gst_caps_copy (caps);
301 guint n = gst_caps_get_size (tmp);
304 for (i = 0; i < n; i++) {
305 GstCapsFeatures *features = gst_caps_get_features (tmp, i);
307 guint n_f = gst_caps_features_get_size (features);
309 for (j = 0; j < n_f; j++) {
310 gst_caps_features_remove_id (features,
311 gst_caps_features_get_nth_id (features, j));
315 gst_caps_features_add (features, feature_name);
316 gst_caps_set_simple (tmp, "format", G_TYPE_STRING, "RGBA", NULL);
322 /* copies the given caps */
324 gst_gl_mixer_caps_remove_format_info (GstCaps * caps)
331 res = gst_caps_new_empty ();
333 n = gst_caps_get_size (caps);
334 for (i = 0; i < n; i++) {
335 st = gst_caps_get_structure (caps, i);
336 f = gst_caps_get_features (caps, i);
338 /* If this is already expressed by the existing caps
339 * skip this structure */
340 if (i > 0 && gst_caps_is_subset_structure_full (res, st, f))
343 st = gst_structure_copy (st);
344 /* Only remove format info for the cases when we can actually convert */
345 if (!gst_caps_features_is_any (f)
346 && gst_caps_features_is_equal (f,
347 GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY))
348 gst_structure_remove_fields (st, "format", "colorimetry", "chroma-site",
350 gst_structure_remove_fields (st, "width", "height", NULL);
352 gst_caps_append_structure_full (res, st, gst_caps_features_copy (f));
359 gst_gl_mixer_update_caps (GstGLMixer * mix, GstCaps * caps)
361 GstCaps *result = NULL;
362 GstCaps *glcaps = gst_gl_mixer_set_caps_features (caps,
363 GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
364 #if GST_GL_HAVE_PLATFORM_EGL
365 GstCaps *eglcaps = gst_gl_mixer_set_caps_features (caps,
366 GST_CAPS_FEATURE_MEMORY_EGL_IMAGE);
368 GstCaps *uploadcaps = gst_gl_mixer_set_caps_features (caps,
369 GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META);
371 gst_caps_from_string (GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS));
373 result = gst_caps_new_empty ();
375 result = gst_caps_merge (result, glcaps);
376 #if GST_GL_HAVE_PLATFORM_EGL
377 result = gst_caps_merge (result, eglcaps);
379 result = gst_caps_merge (result, uploadcaps);
380 result = gst_caps_merge (result, raw_caps);
382 result = gst_caps_merge (result, gst_gl_mixer_caps_remove_format_info (caps));
384 GST_DEBUG_OBJECT (mix, "returning %" GST_PTR_FORMAT, result);
390 gst_gl_mixer_pad_sink_getcaps (GstPad * pad, GstGLMixer * mix, GstCaps * filter)
393 GstCaps *template_caps;
394 GstCaps *filtered_caps;
395 GstCaps *returned_caps;
396 gboolean had_current_caps = TRUE;
398 template_caps = gst_pad_get_pad_template_caps (pad);
400 srccaps = gst_pad_get_current_caps (pad);
401 if (srccaps == NULL) {
402 had_current_caps = FALSE;
403 srccaps = template_caps;
405 srccaps = gst_caps_merge (srccaps, gst_gl_mixer_update_caps (mix, srccaps));
408 filtered_caps = srccaps;
410 filtered_caps = gst_caps_intersect (srccaps, filter);
411 returned_caps = gst_caps_intersect (filtered_caps, template_caps);
414 gst_caps_unref (filtered_caps);
415 if (had_current_caps)
416 gst_caps_unref (template_caps);
418 GST_DEBUG_OBJECT (pad, "returning %" GST_PTR_FORMAT, returned_caps);
420 return returned_caps;
424 gst_gl_mixer_sink_query (GstAggregator * agg, GstAggregatorPad * bpad,
427 gboolean ret = FALSE;
428 GstGLMixer *mix = GST_GL_MIXER (agg);
430 GST_TRACE ("QUERY %" GST_PTR_FORMAT, query);
432 switch (GST_QUERY_TYPE (query)) {
435 GstCaps *filter, *caps;
437 gst_query_parse_caps (query, &filter);
438 caps = gst_gl_mixer_pad_sink_getcaps (GST_PAD (bpad), mix, filter);
439 gst_query_set_caps_result (query, caps);
440 gst_caps_unref (caps);
444 case GST_QUERY_ACCEPT_CAPS:
448 gst_query_parse_accept_caps (query, &caps);
449 ret = gst_gl_mixer_pad_sink_acceptcaps (GST_PAD (bpad), mix, caps);
450 gst_query_set_accept_caps_result (query, ret);
454 case GST_QUERY_ALLOCATION:
456 GstQuery *decide_query = NULL;
458 GST_OBJECT_LOCK (mix);
459 if (G_UNLIKELY (!mix->priv->negotiated)) {
460 GST_DEBUG_OBJECT (mix,
461 "not negotiated yet, can't answer ALLOCATION query");
462 GST_OBJECT_UNLOCK (mix);
465 if ((decide_query = mix->priv->query))
466 gst_query_ref (decide_query);
467 GST_OBJECT_UNLOCK (mix);
469 GST_DEBUG_OBJECT (mix,
470 "calling propose allocation with query %" GST_PTR_FORMAT,
473 /* pass the query to the propose_allocation vmethod if any */
474 ret = gst_gl_mixer_propose_allocation (mix, decide_query, query);
477 gst_query_unref (decide_query);
479 GST_DEBUG_OBJECT (mix, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret, query);
482 case GST_QUERY_CONTEXT:
484 ret = gst_gl_handle_context_query ((GstElement *) mix, query,
485 &mix->display, &mix->other_context);
489 ret = GST_AGGREGATOR_CLASS (parent_class)->sink_query (agg, bpad, query);
497 gst_gl_mixer_pad_init (GstGLMixerPad * mixerpad)
501 /* GLMixer signals and args */
514 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
517 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
518 (GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
520 GST_VIDEO_CAPS_MAKE_WITH_FEATURES
521 (GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
523 "; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
526 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
529 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
530 (GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
532 GST_VIDEO_CAPS_MAKE_WITH_FEATURES
533 (GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
535 "; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
538 static gboolean gst_gl_mixer_src_query (GstAggregator * agg, GstQuery * query);
540 gst_gl_mixer_get_output_buffer (GstVideoAggregator * videoaggregator,
541 GstBuffer ** outbuf);
543 gst_gl_mixer_src_activate_mode (GstAggregator * aggregator, GstPadMode mode,
545 static gboolean gst_gl_mixer_stop (GstAggregator * agg);
546 static gboolean gst_gl_mixer_start (GstAggregator * agg);
549 gst_gl_mixer_aggregate_frames (GstVideoAggregator * vagg,
550 GstBuffer * outbuffer);
552 static void gst_gl_mixer_set_property (GObject * object, guint prop_id,
553 const GValue * value, GParamSpec * pspec);
554 static void gst_gl_mixer_get_property (GObject * object, guint prop_id,
555 GValue * value, GParamSpec * pspec);
557 static gboolean gst_gl_mixer_decide_allocation (GstGLMixer * mix,
559 static gboolean gst_gl_mixer_set_allocation (GstGLMixer * mix,
560 GstBufferPool * pool, GstAllocator * allocator,
561 GstAllocationParams * params, GstQuery * query);
563 static void gst_gl_mixer_finalize (GObject * object);
566 gst_gl_mixer_class_init (GstGLMixerClass * klass)
568 GObjectClass *gobject_class;
569 GstElementClass *element_class;
571 GstVideoAggregatorClass *videoaggregator_class =
572 (GstVideoAggregatorClass *) klass;
573 GstAggregatorClass *agg_class = (GstAggregatorClass *) klass;
575 GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glmixer", 0, "opengl mixer");
577 gobject_class = (GObjectClass *) klass;
578 element_class = GST_ELEMENT_CLASS (klass);
580 g_type_class_add_private (klass, sizeof (GstGLMixerPrivate));
582 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_gl_mixer_finalize);
584 gobject_class->get_property = gst_gl_mixer_get_property;
585 gobject_class->set_property = gst_gl_mixer_set_property;
587 gst_element_class_add_pad_template (element_class,
588 gst_static_pad_template_get (&src_factory));
589 gst_element_class_add_pad_template (element_class,
590 gst_static_pad_template_get (&sink_factory));
592 element_class->set_context = GST_DEBUG_FUNCPTR (gst_gl_mixer_set_context);
594 agg_class->sinkpads_type = GST_TYPE_GL_MIXER_PAD;
595 agg_class->sink_query = gst_gl_mixer_sink_query;
596 agg_class->src_query = gst_gl_mixer_src_query;
597 agg_class->src_activate = gst_gl_mixer_src_activate_mode;
598 agg_class->stop = gst_gl_mixer_stop;
599 agg_class->start = gst_gl_mixer_start;
601 videoaggregator_class->aggregate_frames = gst_gl_mixer_aggregate_frames;
602 videoaggregator_class->get_output_buffer = gst_gl_mixer_get_output_buffer;
603 videoaggregator_class->negotiated_caps = _negotiated_caps;
604 videoaggregator_class->find_best_format = NULL;
606 g_object_class_install_property (gobject_class, PROP_CONTEXT,
607 g_param_spec_object ("context",
609 "Get OpenGL context",
610 GST_GL_TYPE_CONTEXT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
612 /* Register the pad class */
613 g_type_class_ref (GST_TYPE_GL_MIXER_PAD);
615 klass->set_caps = NULL;
620 gst_gl_mixer_reset (GstGLMixer * mix)
622 /* clean up collect data */
623 mix->priv->negotiated = FALSE;
627 gst_gl_mixer_init (GstGLMixer * mix)
629 mix->priv = GST_GL_MIXER_GET_PRIVATE (mix);
630 mix->array_buffers = 0;
633 mix->depthbuffer = 0;
635 mix->priv->gl_resource_ready = FALSE;
636 g_mutex_init (&mix->priv->gl_resource_lock);
637 g_cond_init (&mix->priv->gl_resource_cond);
638 /* initialize variables */
639 gst_gl_mixer_reset (mix);
643 gst_gl_mixer_finalize (GObject * object)
645 GstGLMixer *mix = GST_GL_MIXER (object);
646 GstGLMixerPrivate *priv = mix->priv;
648 if (mix->other_context) {
649 gst_object_unref (mix->other_context);
650 mix->other_context = NULL;
653 g_mutex_clear (&priv->gl_resource_lock);
654 g_cond_clear (&priv->gl_resource_cond);
655 G_OBJECT_CLASS (parent_class)->finalize (object);
659 gst_gl_mixer_set_context (GstElement * element, GstContext * context)
661 GstGLMixer *mix = GST_GL_MIXER (element);
663 gst_gl_handle_set_context (element, context, &mix->display,
664 &mix->other_context);
668 gst_gl_mixer_activate (GstGLMixer * mix, gboolean active)
670 gboolean result = TRUE;
673 if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
681 gst_gl_mixer_src_activate_mode (GstAggregator * aggregator, GstPadMode mode,
685 gboolean result = FALSE;
687 mix = GST_GL_MIXER (aggregator);
690 case GST_PAD_MODE_PUSH:
691 case GST_PAD_MODE_PULL:
692 result = gst_gl_mixer_activate (mix, active);
702 gst_gl_mixer_query_caps (GstPad * pad, GstAggregator * agg, GstQuery * query)
704 GstCaps *filter, *current_caps, *retcaps;
706 gst_query_parse_caps (query, &filter);
708 current_caps = gst_pad_get_current_caps (pad);
709 if (current_caps == NULL)
710 current_caps = gst_pad_get_pad_template_caps (agg->srcpad);
712 retcaps = gst_gl_mixer_caps_remove_format_info (current_caps);
713 gst_caps_unref (current_caps);
717 gst_caps_intersect_full (filter, retcaps, GST_CAPS_INTERSECT_FIRST);
719 gst_query_set_caps_result (query, retcaps);
720 gst_caps_unref (retcaps);
726 gst_gl_mixer_src_query (GstAggregator * agg, GstQuery * query)
728 gboolean res = FALSE;
729 GstGLMixer *mix = GST_GL_MIXER (agg);
731 switch (GST_QUERY_TYPE (query)) {
732 case GST_QUERY_CONTEXT:
734 res = gst_gl_handle_context_query ((GstElement *) mix, query,
735 &mix->display, &mix->other_context);
739 res = gst_gl_mixer_query_caps (agg->srcpad, agg, query);
742 res = GST_AGGREGATOR_CLASS (parent_class)->src_query (agg, query);
750 gst_gl_mixer_get_output_buffer (GstVideoAggregator * videoaggregator,
753 GstGLMixer *mix = GST_GL_MIXER (videoaggregator);
755 if (!mix->priv->pool_active) {
756 if (!gst_buffer_pool_set_active (mix->priv->pool, TRUE)) {
757 GST_ELEMENT_ERROR (mix, RESOURCE, SETTINGS,
758 ("failed to activate bufferpool"), ("failed to activate bufferpool"));
759 return GST_FLOW_ERROR;
761 mix->priv->pool_active = TRUE;
764 return gst_buffer_pool_acquire_buffer (mix->priv->pool, outbuf, NULL);
768 gst_gl_mixer_decide_allocation (GstGLMixer * mix, GstQuery * query)
770 GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix);
771 GstBufferPool *pool = NULL;
772 GstStructure *config;
774 guint min, max, size;
775 gboolean update_pool;
776 GError *error = NULL;
778 guint out_width, out_height;
779 GstGLContext *other_context = NULL;
780 GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mix);
782 if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
785 if (gst_query_find_allocation_meta (query,
786 GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, &idx)) {
787 GstGLContext *context;
788 const GstStructure *upload_meta_params;
793 gst_query_parse_nth_allocation_meta (query, idx, &upload_meta_params);
794 if (upload_meta_params) {
795 if (gst_structure_get (upload_meta_params, "gst.gl.GstGLContext",
796 GST_GL_TYPE_CONTEXT, &context, NULL) && context) {
797 GstGLContext *old = mix->context;
799 mix->context = context;
801 gst_object_unref (old);
802 } else if (gst_structure_get (upload_meta_params, "gst.gl.context.handle",
803 G_TYPE_POINTER, &handle, "gst.gl.context.type", G_TYPE_STRING,
804 &type, "gst.gl.context.apis", G_TYPE_STRING, &apis, NULL)
806 GstGLPlatform platform;
809 GST_DEBUG ("got GL context handle 0x%p with type %s and apis %s",
812 platform = gst_gl_platform_from_string (type);
813 gl_apis = gst_gl_api_from_string (apis);
815 if (gl_apis && platform)
817 gst_gl_context_new_wrapped (mix->display, (guintptr) handle,
823 if (mix->other_context) {
824 if (!other_context) {
825 other_context = mix->other_context;
827 GST_ELEMENT_WARNING (mix, LIBRARY, SETTINGS,
828 ("%s", "Cannot share with more than one GL context"),
829 ("%s", "Cannot share with more than one GL context"));
834 mix->context = gst_gl_context_new (mix->display);
835 if (!gst_gl_context_create (mix->context, other_context, &error))
839 out_width = GST_VIDEO_INFO_WIDTH (&vagg->info);
840 out_height = GST_VIDEO_INFO_HEIGHT (&vagg->info);
842 g_mutex_lock (&mix->priv->gl_resource_lock);
843 mix->priv->gl_resource_ready = FALSE;
845 gst_gl_context_del_fbo (mix->context, mix->fbo, mix->depthbuffer);
847 mix->depthbuffer = 0;
850 if (!gst_gl_context_gen_fbo (mix->context, out_width, out_height,
851 &mix->fbo, &mix->depthbuffer)) {
852 g_cond_signal (&mix->priv->gl_resource_cond);
853 g_mutex_unlock (&mix->priv->gl_resource_lock);
858 gst_gl_context_del_texture (mix->context, &mix->out_tex_id);
859 gst_gl_context_gen_texture (mix->context, &mix->out_tex_id,
860 GST_VIDEO_FORMAT_RGBA, out_width, out_height);
862 gst_query_parse_allocation (query, &caps, NULL);
864 if (mixer_class->set_caps)
865 mixer_class->set_caps (mix, caps);
867 mix->priv->gl_resource_ready = TRUE;
868 g_cond_signal (&mix->priv->gl_resource_cond);
869 g_mutex_unlock (&mix->priv->gl_resource_lock);
871 if (gst_query_get_n_allocation_pools (query) > 0) {
872 gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
878 gst_video_info_init (&vinfo);
879 gst_video_info_from_caps (&vinfo, caps);
886 pool = gst_gl_buffer_pool_new (mix->context);
888 config = gst_buffer_pool_get_config (pool);
889 gst_buffer_pool_config_set_params (config, caps, size, min, max);
891 gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
892 gst_buffer_pool_config_add_option (config,
893 GST_BUFFER_POOL_OPTION_VIDEO_GL_TEXTURE_UPLOAD_META);
895 gst_buffer_pool_set_config (pool, config);
898 gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
900 gst_query_add_allocation_pool (query, pool, size, min, max);
902 gst_object_unref (pool);
908 GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s", error->message),
914 /* takes ownership of the pool, allocator and query */
916 gst_gl_mixer_set_allocation (GstGLMixer * mix,
917 GstBufferPool * pool, GstAllocator * allocator,
918 GstAllocationParams * params, GstQuery * query)
920 GstAllocator *oldalloc;
921 GstBufferPool *oldpool;
923 GstGLMixerPrivate *priv = mix->priv;
925 GST_DEBUG ("storing allocation query");
927 GST_OBJECT_LOCK (mix);
928 oldpool = priv->pool;
930 priv->pool_active = FALSE;
932 oldalloc = priv->allocator;
933 priv->allocator = allocator;
935 oldquery = priv->query;
939 priv->params = *params;
941 gst_allocation_params_init (&priv->params);
942 GST_OBJECT_UNLOCK (mix);
945 GST_DEBUG_OBJECT (mix, "deactivating old pool %p", oldpool);
946 gst_buffer_pool_set_active (oldpool, FALSE);
947 gst_object_unref (oldpool);
950 gst_object_unref (oldalloc);
953 gst_query_unref (oldquery);
959 gst_gl_mixer_do_bufferpool (GstGLMixer * mix, GstCaps * outcaps)
962 gboolean result = TRUE;
963 GstBufferPool *pool = NULL;
964 GstAllocator *allocator;
965 GstAllocationParams params;
966 GstAggregator *agg = GST_AGGREGATOR (mix);
968 /* find a pool for the negotiated caps now */
969 GST_DEBUG_OBJECT (mix, "doing allocation query");
970 query = gst_query_new_allocation (outcaps, TRUE);
971 if (!gst_pad_peer_query (agg->srcpad, query)) {
972 /* not a problem, just debug a little */
973 GST_DEBUG_OBJECT (mix, "peer ALLOCATION query failed");
976 GST_DEBUG_OBJECT (mix, "calling decide_allocation");
977 result = gst_gl_mixer_decide_allocation (mix, query);
979 GST_DEBUG_OBJECT (mix, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, result,
983 goto no_decide_allocation;
985 /* we got configuration from our peer or the decide_allocation method,
987 if (gst_query_get_n_allocation_params (query) > 0) {
988 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
991 gst_allocation_params_init (¶ms);
994 if (gst_query_get_n_allocation_pools (query) > 0)
995 gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
998 result = gst_gl_mixer_set_allocation (mix, pool, allocator, ¶ms, query);
1003 no_decide_allocation:
1005 GST_WARNING_OBJECT (mix, "Failed to decide allocation");
1006 gst_query_unref (query);
1013 gst_gl_mixer_process_textures (GstGLMixer * mix, GstBuffer * outbuf)
1018 gboolean res = TRUE;
1019 guint array_index = 0;
1020 GstVideoFrame out_frame;
1021 GstElement *element = GST_ELEMENT (mix);
1022 GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mix);
1023 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
1024 GstGLMixerPrivate *priv = mix->priv;
1025 gboolean to_download =
1026 gst_caps_features_is_equal (GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY,
1027 gst_caps_get_features (mix->out_caps, 0));
1028 GstMapFlags out_map_flags = GST_MAP_WRITE;
1030 GST_TRACE ("Processing buffers");
1032 to_download |= !gst_is_gl_memory (gst_buffer_peek_memory (outbuf, 0));
1035 out_map_flags |= GST_MAP_GL;
1037 if (!gst_video_frame_map (&out_frame, &vagg->info, outbuf, out_map_flags)) {
1042 out_tex = *(guint *) out_frame.data[0];
1044 GST_INFO ("Output Buffer does not contain correct memory, "
1045 "attempting to wrap for download");
1048 mix->download = gst_gl_download_new (mix->context);
1050 gst_gl_download_set_format (mix->download, &out_frame.info);
1051 out_tex = mix->out_tex_id;
1054 GST_OBJECT_LOCK (mix);
1055 walk = element->sinkpads;
1057 i = mix->frames->len;
1058 g_ptr_array_set_size (mix->frames, element->numsinkpads);
1059 for (; i < element->numsinkpads; i++)
1060 mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
1062 GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
1063 GstVideoAggregatorPad *vaggpad = walk->data;
1064 GstGLMixerFrameData *frame;
1066 frame = g_ptr_array_index (mix->frames, array_index);
1070 walk = g_list_next (walk);
1072 if (vaggpad->buffer != NULL) {
1075 GstCapsFeatures *gl_features;
1076 GstVideoInfo gl_info;
1077 GstVideoFrame gl_frame;
1079 gst_video_info_set_format (&gl_info,
1080 GST_VIDEO_FORMAT_RGBA,
1081 GST_VIDEO_INFO_WIDTH (&vaggpad->info),
1082 GST_VIDEO_INFO_HEIGHT (&vaggpad->info));
1084 gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
1086 gl_caps = gst_video_info_to_caps (&gl_info);
1087 gst_caps_set_features (gl_caps, 0, gl_features);
1090 GstCaps *in_caps = gst_pad_get_current_caps (GST_PAD (pad));
1092 pad->upload = gst_gl_upload_new (mix->context);
1094 gst_gl_upload_set_caps (pad->upload, in_caps, gl_caps);
1096 gst_caps_unref (in_caps);
1099 if (!gst_gl_upload_perform_with_buffer (pad->upload,
1100 vaggpad->buffer, &gl_buf)) {
1102 pad->mapped = FALSE;
1103 gst_caps_unref (gl_caps);
1107 if (!gst_video_frame_map (&gl_frame, &gl_info, gl_buf,
1108 GST_MAP_READ | GST_MAP_GL)) {
1110 pad->mapped = FALSE;
1111 gst_buffer_unref (gl_buf);
1112 gst_caps_unref (gl_caps);
1117 frame->texture = *(guint *) gl_frame.data[0];
1119 gst_caps_unref (gl_caps);
1120 gst_video_frame_unmap (&gl_frame);
1121 gst_buffer_unref (gl_buf);
1126 g_mutex_lock (&priv->gl_resource_lock);
1127 if (!priv->gl_resource_ready)
1128 g_cond_wait (&priv->gl_resource_cond, &priv->gl_resource_lock);
1130 if (!priv->gl_resource_ready) {
1131 g_mutex_unlock (&priv->gl_resource_lock);
1132 GST_ERROR_OBJECT (mix,
1133 "fbo used to render can't be created, do not run process_textures");
1138 mix_class->process_textures (mix, mix->frames, out_tex);
1140 g_mutex_unlock (&priv->gl_resource_lock);
1143 if (!gst_gl_download_perform_with_data (mix->download, out_tex,
1145 GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s",
1146 "Failed to download video frame"), (NULL));
1154 walk = GST_ELEMENT (mix)->sinkpads;
1156 GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
1159 gst_gl_upload_release_buffer (pad->upload);
1161 pad->mapped = FALSE;
1162 walk = g_list_next (walk);
1165 GST_OBJECT_UNLOCK (mix);
1167 gst_video_frame_unmap (&out_frame);
1173 gst_gl_mixer_process_buffers (GstGLMixer * mix, GstBuffer * outbuf)
1176 guint i, array_index = 0;
1177 GstElement *element = GST_ELEMENT (mix);
1178 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
1180 GST_OBJECT_LOCK (mix);
1181 walk = GST_ELEMENT (mix)->sinkpads;
1182 i = mix->frames->len;
1183 g_ptr_array_set_size (mix->frames, element->numsinkpads);
1184 for (; i < element->numsinkpads; i++)
1185 mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
1186 while (walk) { /* We walk with this list because it's ordered */
1187 GstVideoAggregatorPad *vaggpad = walk->data;
1189 walk = g_list_next (walk);
1191 if (vaggpad->buffer != NULL) {
1192 /* put buffer into array */
1193 mix->array_buffers->pdata[array_index] = vaggpad->buffer;
1197 GST_OBJECT_UNLOCK (mix);
1199 return mix_class->process_buffers (mix, mix->array_buffers, outbuf);
1204 static GstFlowReturn
1205 gst_gl_mixer_aggregate_frames (GstVideoAggregator * vagg, GstBuffer * outbuf)
1207 gboolean res = FALSE;
1208 GstGLMixer *mix = GST_GL_MIXER (vagg);
1209 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (vagg);
1211 if (mix_class->process_buffers)
1212 res = gst_gl_mixer_process_buffers (mix, outbuf);
1213 else if (mix_class->process_textures)
1214 res = gst_gl_mixer_process_textures (mix, outbuf);
1216 return res ? GST_FLOW_OK : GST_FLOW_ERROR;
1220 gst_gl_mixer_get_property (GObject * object,
1221 guint prop_id, GValue * value, GParamSpec * pspec)
1223 GstGLMixer *mixer = GST_GL_MIXER (object);
1227 g_value_set_object (value, mixer->context);
1230 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1236 gst_gl_mixer_set_property (GObject * object,
1237 guint prop_id, const GValue * value, GParamSpec * pspec)
1241 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1247 _clean_upload (GstAggregator * agg, GstPad * aggpad, gpointer udata)
1249 GstGLMixerPad *pad = GST_GL_MIXER_PAD (aggpad);
1252 gst_object_unref (pad->upload);
1260 _free_glmixer_frame_data (GstGLMixerFrameData * frame)
1262 g_slice_free1 (sizeof (GstGLMixerFrameData), frame);
1266 gst_gl_mixer_start (GstAggregator * agg)
1269 GstGLMixer *mix = GST_GL_MIXER (agg);
1270 GstElement *element = GST_ELEMENT (agg);
1272 if (!GST_AGGREGATOR_CLASS (parent_class)->start (agg))
1275 GST_OBJECT_LOCK (mix);
1276 mix->array_buffers = g_ptr_array_new_full (element->numsinkpads,
1277 (GDestroyNotify) _free_glmixer_frame_data);
1278 mix->frames = g_ptr_array_new_full (element->numsinkpads, NULL);
1280 g_ptr_array_set_size (mix->array_buffers, element->numsinkpads);
1281 g_ptr_array_set_size (mix->frames, element->numsinkpads);
1283 for (i = 0; i < element->numsinkpads; i++)
1284 mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
1286 GST_OBJECT_UNLOCK (mix);
1292 gst_gl_mixer_stop (GstAggregator * agg)
1294 GstGLMixer *mix = GST_GL_MIXER (agg);
1295 GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix);
1297 if (!GST_AGGREGATOR_CLASS (parent_class)->stop (agg))
1300 GST_OBJECT_LOCK (agg);
1301 g_ptr_array_free (mix->frames, TRUE);
1303 g_ptr_array_free (mix->array_buffers, TRUE);
1304 mix->array_buffers = NULL;
1305 GST_OBJECT_UNLOCK (agg);
1307 if (mixer_class->reset)
1308 mixer_class->reset (mix);
1310 gst_gl_context_del_fbo (mix->context, mix->fbo, mix->depthbuffer);
1312 mix->depthbuffer = 0;
1314 if (mix->download) {
1315 gst_object_unref (mix->download);
1316 mix->download = NULL;
1319 gst_aggregator_iterate_sinkpads (GST_AGGREGATOR (mix), _clean_upload, NULL);
1321 if (mix->priv->query) {
1322 gst_query_unref (mix->priv->query);
1323 mix->priv->query = NULL;
1326 if (mix->priv->pool) {
1327 gst_object_unref (mix->priv->pool);
1328 mix->priv->pool = NULL;
1332 gst_object_unref (mix->display);
1333 mix->display = NULL;
1337 gst_object_unref (mix->context);
1338 mix->context = NULL;
1341 gst_gl_mixer_reset (mix);