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;
91 gobject_class->set_property = gst_gl_mixer_pad_set_property;
92 gobject_class->get_property = gst_gl_mixer_pad_get_property;
94 gobject_class->finalize = gst_gl_mixer_pad_finalize;
98 gst_gl_mixer_pad_finalize (GObject * object)
100 GstGLMixerPad *pad = GST_GL_MIXER_PAD (object);
103 gst_object_unref (pad->upload);
107 G_OBJECT_CLASS (gst_gl_mixer_pad_parent_class)->finalize (object);
111 gst_gl_mixer_pad_get_property (GObject * object, guint prop_id,
112 GValue * value, GParamSpec * pspec)
116 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
122 gst_gl_mixer_pad_set_property (GObject * object, guint prop_id,
123 const GValue * value, GParamSpec * pspec)
127 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
133 _negotiated_caps (GstVideoAggregator * vagg, GstCaps * caps)
135 GstGLMixer *mix = GST_GL_MIXER (vagg);
136 gboolean ret = gst_gl_mixer_do_bufferpool (mix, caps);
138 mix->priv->negotiated = ret;
140 gst_caps_replace (&mix->out_caps, caps);
146 gst_gl_mixer_propose_allocation (GstGLMixer * mix,
147 GstQuery * decide_query, GstQuery * query)
150 GstStructure *config;
154 GError *error = NULL;
155 GstStructure *gl_context;
156 gchar *platform, *gl_apis;
158 GstAllocator *allocator = NULL;
159 GstAllocationParams params;
161 gst_query_parse_allocation (query, &caps, &need_pool);
166 if ((pool = mix->priv->pool))
167 gst_object_ref (pool);
172 /* we had a pool, check caps */
173 GST_DEBUG_OBJECT (mix, "check existing pool caps");
174 config = gst_buffer_pool_get_config (pool);
175 gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
177 if (!gst_caps_is_equal (caps, pcaps)) {
178 GST_DEBUG_OBJECT (mix, "pool has different caps");
179 /* different caps, we can't use this pool */
180 gst_object_unref (pool);
183 gst_structure_free (config);
186 if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
190 mix->context = gst_gl_context_new (mix->display);
191 if (!gst_gl_context_create (mix->context, mix->other_context, &error))
195 if (pool == NULL && need_pool) {
198 if (!gst_video_info_from_caps (&info, caps))
201 GST_DEBUG_OBJECT (mix, "create new pool");
202 pool = gst_gl_buffer_pool_new (mix->context);
204 /* the normal size of a frame */
207 config = gst_buffer_pool_get_config (pool);
208 gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
209 if (!gst_buffer_pool_set_config (pool, config))
214 gst_query_add_allocation_pool (query, pool, size, 1, 0);
215 gst_object_unref (pool);
218 /* we also support various metadata */
219 gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, 0);
221 gl_apis = gst_gl_api_to_string (gst_gl_context_get_gl_api (mix->context));
223 gst_gl_platform_to_string (gst_gl_context_get_gl_platform (mix->context));
224 handle = (gpointer) gst_gl_context_get_gl_context (mix->context);
227 gst_structure_new ("GstVideoGLTextureUploadMeta", "gst.gl.GstGLContext",
228 GST_GL_TYPE_CONTEXT, mix->context, "gst.gl.context.handle",
229 G_TYPE_POINTER, handle, "gst.gl.context.type", G_TYPE_STRING, platform,
230 "gst.gl.context.apis", G_TYPE_STRING, gl_apis, NULL);
231 gst_query_add_allocation_meta (query,
232 GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, gl_context);
236 gst_structure_free (gl_context);
238 gst_allocation_params_init (¶ms);
240 allocator = gst_allocator_find (GST_GL_MEMORY_ALLOCATOR);
241 gst_query_add_allocation_param (query, allocator, ¶ms);
242 gst_object_unref (allocator);
249 GST_DEBUG_OBJECT (mix, "no caps specified");
254 GST_DEBUG_OBJECT (mix, "invalid caps specified");
259 GST_DEBUG_OBJECT (mix, "failed setting config");
264 GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s", error->message),
271 gst_gl_mixer_pad_sink_acceptcaps (GstPad * pad, GstGLMixer * mix,
275 GstCaps *template_caps;
277 GST_DEBUG_OBJECT (pad, "try accept caps of %" GST_PTR_FORMAT, caps);
279 template_caps = gst_pad_get_pad_template_caps (pad);
280 template_caps = gst_caps_make_writable (template_caps);
282 ret = gst_caps_can_intersect (caps, template_caps);
283 GST_DEBUG_OBJECT (pad, "%saccepted caps %" GST_PTR_FORMAT,
284 (ret ? "" : "not "), caps);
285 gst_caps_unref (template_caps);
291 gst_gl_mixer_sink_query (GstAggregator * agg, GstAggregatorPad * bpad,
294 gboolean ret = FALSE;
295 GstGLMixer *mix = GST_GL_MIXER (agg);
297 GST_TRACE ("QUERY %" GST_PTR_FORMAT, query);
299 switch (GST_QUERY_TYPE (query)) {
300 case GST_QUERY_ACCEPT_CAPS:
304 gst_query_parse_accept_caps (query, &caps);
305 ret = gst_gl_mixer_pad_sink_acceptcaps (GST_PAD (bpad), mix, caps);
306 gst_query_set_accept_caps_result (query, ret);
310 case GST_QUERY_ALLOCATION:
312 GstQuery *decide_query = NULL;
314 GST_OBJECT_LOCK (mix);
315 if (G_UNLIKELY (!mix->priv->negotiated)) {
316 GST_DEBUG_OBJECT (mix,
317 "not negotiated yet, can't answer ALLOCATION query");
318 GST_OBJECT_UNLOCK (mix);
321 if ((decide_query = mix->priv->query))
322 gst_query_ref (decide_query);
323 GST_OBJECT_UNLOCK (mix);
325 GST_DEBUG_OBJECT (mix,
326 "calling propose allocation with query %" GST_PTR_FORMAT,
329 /* pass the query to the propose_allocation vmethod if any */
330 ret = gst_gl_mixer_propose_allocation (mix, decide_query, query);
333 gst_query_unref (decide_query);
335 GST_DEBUG_OBJECT (mix, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret, query);
338 case GST_QUERY_CONTEXT:
340 ret = gst_gl_handle_context_query ((GstElement *) mix, query,
341 &mix->display, &mix->other_context);
345 ret = GST_AGGREGATOR_CLASS (parent_class)->sink_query (agg, bpad, query);
353 gst_gl_mixer_pad_init (GstGLMixerPad * mixerpad)
357 /* GLMixer signals and args */
369 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
372 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
373 (GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
375 GST_VIDEO_CAPS_MAKE_WITH_FEATURES
376 (GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
378 "; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
381 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
384 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
385 (GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
387 GST_VIDEO_CAPS_MAKE_WITH_FEATURES
388 (GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
390 "; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
393 static gboolean gst_gl_mixer_src_query (GstAggregator * agg, GstQuery * query);
395 gst_gl_mixer_get_output_buffer (GstVideoAggregator * videoaggregator,
396 GstBuffer ** outbuf);
398 gst_gl_mixer_src_activate_mode (GstAggregator * aggregator, GstPadMode mode,
400 static gboolean gst_gl_mixer_stop (GstAggregator * agg);
401 static gboolean gst_gl_mixer_start (GstAggregator * agg);
404 gst_gl_mixer_aggregate_frames (GstVideoAggregator * vagg,
405 GstBuffer * outbuffer);
407 static void gst_gl_mixer_set_property (GObject * object, guint prop_id,
408 const GValue * value, GParamSpec * pspec);
409 static void gst_gl_mixer_get_property (GObject * object, guint prop_id,
410 GValue * value, GParamSpec * pspec);
412 static gboolean gst_gl_mixer_decide_allocation (GstGLMixer * mix,
414 static gboolean gst_gl_mixer_set_allocation (GstGLMixer * mix,
415 GstBufferPool * pool, GstAllocator * allocator,
416 GstAllocationParams * params, GstQuery * query);
418 static void gst_gl_mixer_finalize (GObject * object);
421 gst_gl_mixer_class_init (GstGLMixerClass * klass)
423 GObjectClass *gobject_class;
424 GstElementClass *element_class;
426 GstVideoAggregatorClass *videoaggregator_class =
427 (GstVideoAggregatorClass *) klass;
428 GstAggregatorClass *agg_class = (GstAggregatorClass *) klass;
430 GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glmixer", 0, "opengl mixer");
432 gobject_class = (GObjectClass *) klass;
433 element_class = GST_ELEMENT_CLASS (klass);
435 g_type_class_add_private (klass, sizeof (GstGLMixerPrivate));
437 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_gl_mixer_finalize);
439 gobject_class->get_property = gst_gl_mixer_get_property;
440 gobject_class->set_property = gst_gl_mixer_set_property;
442 gst_element_class_add_pad_template (element_class,
443 gst_static_pad_template_get (&src_factory));
444 gst_element_class_add_pad_template (element_class,
445 gst_static_pad_template_get (&sink_factory));
447 element_class->set_context = GST_DEBUG_FUNCPTR (gst_gl_mixer_set_context);
449 agg_class->sinkpads_type = GST_TYPE_GL_MIXER_PAD;
450 agg_class->sink_query = gst_gl_mixer_sink_query;
451 agg_class->src_query = gst_gl_mixer_src_query;
452 agg_class->src_activate = gst_gl_mixer_src_activate_mode;
453 agg_class->stop = gst_gl_mixer_stop;
454 agg_class->start = gst_gl_mixer_start;
456 videoaggregator_class->disable_frame_conversion = TRUE;
457 videoaggregator_class->aggregate_frames = gst_gl_mixer_aggregate_frames;
458 videoaggregator_class->get_output_buffer = gst_gl_mixer_get_output_buffer;
459 videoaggregator_class->negotiated_caps = _negotiated_caps;
462 /* Register the pad class */
463 g_type_class_ref (GST_TYPE_GL_MIXER_PAD);
465 klass->set_caps = NULL;
470 gst_gl_mixer_reset (GstGLMixer * mix)
472 /* clean up collect data */
473 mix->priv->negotiated = FALSE;
477 gst_gl_mixer_init (GstGLMixer * mix)
479 mix->priv = GST_GL_MIXER_GET_PRIVATE (mix);
480 mix->array_buffers = 0;
483 mix->depthbuffer = 0;
485 mix->priv->gl_resource_ready = FALSE;
486 g_mutex_init (&mix->priv->gl_resource_lock);
487 g_cond_init (&mix->priv->gl_resource_cond);
488 /* initialize variables */
489 gst_gl_mixer_reset (mix);
493 gst_gl_mixer_finalize (GObject * object)
495 GstGLMixer *mix = GST_GL_MIXER (object);
496 GstGLMixerPrivate *priv = mix->priv;
498 if (mix->other_context) {
499 gst_object_unref (mix->other_context);
500 mix->other_context = NULL;
503 g_mutex_clear (&priv->gl_resource_lock);
504 g_cond_clear (&priv->gl_resource_cond);
505 G_OBJECT_CLASS (parent_class)->finalize (object);
509 gst_gl_mixer_set_context (GstElement * element, GstContext * context)
511 GstGLMixer *mix = GST_GL_MIXER (element);
513 gst_gl_handle_set_context (element, context, &mix->display, &mix->context);
517 gst_gl_mixer_activate (GstGLMixer * mix, gboolean active)
519 gboolean result = TRUE;
522 if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
530 gst_gl_mixer_src_activate_mode (GstAggregator * aggregator, GstPadMode mode,
534 gboolean result = FALSE;
536 mix = GST_GL_MIXER (aggregator);
539 case GST_PAD_MODE_PUSH:
540 case GST_PAD_MODE_PULL:
541 result = gst_gl_mixer_activate (mix, active);
551 gst_gl_mixer_query_caps (GstPad * pad, GstAggregator * agg, GstQuery * query)
553 GstCaps *filter, *caps;
557 GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
559 gst_query_parse_caps (query, &filter);
561 if (GST_VIDEO_INFO_FORMAT (&vagg->info) != GST_VIDEO_FORMAT_UNKNOWN) {
562 caps = gst_video_info_to_caps (&vagg->info);
564 caps = gst_pad_get_pad_template_caps (agg->srcpad);
567 caps = gst_caps_make_writable (caps);
569 n = gst_caps_get_size (caps) - 1;
570 for (; n >= 0; n--) {
571 s = gst_caps_get_structure (caps, n);
572 gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
573 "height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
574 if (GST_VIDEO_INFO_FPS_D (&vagg->info) != 0) {
575 gst_structure_set (s,
576 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
581 caps = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
583 gst_query_set_caps_result (query, caps);
584 gst_caps_unref (caps);
590 gst_gl_mixer_set_caps_features (const GstCaps * caps,
591 const gchar * feature_name)
593 GstCaps *tmp = gst_caps_copy (caps);
594 guint n = gst_caps_get_size (tmp);
597 for (i = 0; i < n; i++) {
598 GstCapsFeatures *features = gst_caps_get_features (tmp, i);
600 guint n_f = gst_caps_features_get_size (features);
602 for (j = 0; j < n_f; j++) {
603 gst_caps_features_remove_id (features,
604 gst_caps_features_get_nth_id (features, j));
608 gst_caps_features_add (features, feature_name);
609 gst_caps_set_simple (tmp, "format", G_TYPE_STRING, "RGBA", NULL);
615 /* copies the given caps */
617 gst_gl_mixer_caps_remove_format_info (GstCaps * caps)
624 res = gst_caps_new_empty ();
626 n = gst_caps_get_size (caps);
627 for (i = 0; i < n; i++) {
628 st = gst_caps_get_structure (caps, i);
629 f = gst_caps_get_features (caps, i);
631 /* If this is already expressed by the existing caps
632 * skip this structure */
633 if (i > 0 && gst_caps_is_subset_structure_full (res, st, f))
636 st = gst_structure_copy (st);
637 /* Only remove format info for the cases when we can actually convert */
638 if (!gst_caps_features_is_any (f)
639 && gst_caps_features_is_equal (f,
640 GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY))
641 gst_structure_remove_fields (st, "format", "colorimetry", "chroma-site",
642 "width", "height", NULL);
644 gst_caps_append_structure_full (res, st, gst_caps_features_copy (f));
651 gst_gl_mixer_update_caps (GstGLMixer * mix, GstCaps * caps)
653 GstCaps *result = NULL;
654 GstCaps *glcaps = gst_gl_mixer_set_caps_features (caps,
655 GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
656 #if GST_GL_HAVE_PLATFORM_EGL
657 GstCaps *eglcaps = gst_gl_mixer_set_caps_features (caps,
658 GST_CAPS_FEATURE_MEMORY_EGL_IMAGE);
660 GstCaps *uploadcaps = gst_gl_mixer_set_caps_features (caps,
661 GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META);
663 gst_caps_from_string (GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS));
665 result = gst_caps_new_empty ();
667 result = gst_caps_merge (result, glcaps);
668 #if GST_GL_HAVE_PLATFORM_EGL
669 result = gst_caps_merge (result, eglcaps);
671 result = gst_caps_merge (result, uploadcaps);
672 result = gst_caps_merge (result, raw_caps);
674 result = gst_caps_merge (result, gst_gl_mixer_caps_remove_format_info (caps));
676 GST_DEBUG_OBJECT (mix, "returning %" GST_PTR_FORMAT, result);
682 gst_gl_mixer_src_query (GstAggregator * agg, GstQuery * query)
684 gboolean res = FALSE;
685 GstGLMixer *mix = GST_GL_MIXER (agg);
687 switch (GST_QUERY_TYPE (query)) {
688 case GST_QUERY_CONTEXT:
690 res = gst_gl_handle_context_query ((GstElement *) mix, query,
691 &mix->display, &mix->other_context);
695 res = gst_gl_mixer_query_caps (agg->srcpad, agg, query);
698 res = GST_AGGREGATOR_CLASS (parent_class)->src_query (agg, query);
706 gst_gl_mixer_get_output_buffer (GstVideoAggregator * videoaggregator,
709 GstGLMixer *mix = GST_GL_MIXER (videoaggregator);
711 if (!mix->priv->pool_active) {
712 if (!gst_buffer_pool_set_active (mix->priv->pool, TRUE)) {
713 GST_ELEMENT_ERROR (mix, RESOURCE, SETTINGS,
714 ("failed to activate bufferpool"), ("failed to activate bufferpool"));
715 return GST_FLOW_ERROR;
717 mix->priv->pool_active = TRUE;
720 return gst_buffer_pool_acquire_buffer (mix->priv->pool, outbuf, NULL);
724 gst_gl_mixer_decide_allocation (GstGLMixer * mix, GstQuery * query)
726 GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix);
727 GstBufferPool *pool = NULL;
728 GstStructure *config;
730 guint min, max, size;
731 gboolean update_pool;
732 GError *error = NULL;
734 guint out_width, out_height;
735 GstGLContext *other_context = NULL;
736 GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mix);
738 if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
741 if (gst_query_find_allocation_meta (query,
742 GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, &idx)) {
743 GstGLContext *context;
744 const GstStructure *upload_meta_params;
749 gst_query_parse_nth_allocation_meta (query, idx, &upload_meta_params);
750 if (upload_meta_params) {
751 if (gst_structure_get (upload_meta_params, "gst.gl.GstGLContext",
752 GST_GL_TYPE_CONTEXT, &context, NULL) && context) {
753 GstGLContext *old = mix->context;
755 mix->context = context;
757 gst_object_unref (old);
758 } else if (gst_structure_get (upload_meta_params, "gst.gl.context.handle",
759 G_TYPE_POINTER, &handle, "gst.gl.context.type", G_TYPE_STRING,
760 &type, "gst.gl.context.apis", G_TYPE_STRING, &apis, NULL)
762 GstGLPlatform platform;
765 GST_DEBUG ("got GL context handle 0x%p with type %s and apis %s",
768 platform = gst_gl_platform_from_string (type);
769 gl_apis = gst_gl_api_from_string (apis);
771 if (gl_apis && platform)
773 gst_gl_context_new_wrapped (mix->display, (guintptr) handle,
779 if (mix->other_context) {
780 if (!other_context) {
781 other_context = mix->other_context;
783 GST_ELEMENT_WARNING (mix, LIBRARY, SETTINGS,
784 ("%s", "Cannot share with more than one GL context"),
785 ("%s", "Cannot share with more than one GL context"));
790 mix->context = gst_gl_context_new (mix->display);
791 if (!gst_gl_context_create (mix->context, other_context, &error))
795 out_width = GST_VIDEO_INFO_WIDTH (&vagg->info);
796 out_height = GST_VIDEO_INFO_HEIGHT (&vagg->info);
798 g_mutex_lock (&mix->priv->gl_resource_lock);
799 mix->priv->gl_resource_ready = FALSE;
801 gst_gl_context_del_fbo (mix->context, mix->fbo, mix->depthbuffer);
803 mix->depthbuffer = 0;
806 if (!gst_gl_context_gen_fbo (mix->context, out_width, out_height,
807 &mix->fbo, &mix->depthbuffer)) {
808 g_cond_signal (&mix->priv->gl_resource_cond);
809 g_mutex_unlock (&mix->priv->gl_resource_lock);
814 gst_gl_context_del_texture (mix->context, &mix->out_tex_id);
815 gst_gl_context_gen_texture (mix->context, &mix->out_tex_id,
816 GST_VIDEO_FORMAT_RGBA, out_width, out_height);
818 gst_query_parse_allocation (query, &caps, NULL);
820 if (mixer_class->set_caps)
821 mixer_class->set_caps (mix, caps);
823 mix->priv->gl_resource_ready = TRUE;
824 g_cond_signal (&mix->priv->gl_resource_cond);
825 g_mutex_unlock (&mix->priv->gl_resource_lock);
827 if (gst_query_get_n_allocation_pools (query) > 0) {
828 gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
834 gst_video_info_init (&vinfo);
835 gst_video_info_from_caps (&vinfo, caps);
842 pool = gst_gl_buffer_pool_new (mix->context);
844 config = gst_buffer_pool_get_config (pool);
845 gst_buffer_pool_config_set_params (config, caps, size, min, max);
847 gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
848 gst_buffer_pool_config_add_option (config,
849 GST_BUFFER_POOL_OPTION_VIDEO_GL_TEXTURE_UPLOAD_META);
851 gst_buffer_pool_set_config (pool, config);
854 gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
856 gst_query_add_allocation_pool (query, pool, size, min, max);
858 gst_object_unref (pool);
864 GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s", error->message),
870 /* takes ownership of the pool, allocator and query */
872 gst_gl_mixer_set_allocation (GstGLMixer * mix,
873 GstBufferPool * pool, GstAllocator * allocator,
874 GstAllocationParams * params, GstQuery * query)
876 GstAllocator *oldalloc;
877 GstBufferPool *oldpool;
879 GstGLMixerPrivate *priv = mix->priv;
881 GST_DEBUG ("storing allocation query");
883 GST_OBJECT_LOCK (mix);
884 oldpool = priv->pool;
886 priv->pool_active = FALSE;
888 oldalloc = priv->allocator;
889 priv->allocator = allocator;
891 oldquery = priv->query;
895 priv->params = *params;
897 gst_allocation_params_init (&priv->params);
898 GST_OBJECT_UNLOCK (mix);
901 GST_DEBUG_OBJECT (mix, "deactivating old pool %p", oldpool);
902 gst_buffer_pool_set_active (oldpool, FALSE);
903 gst_object_unref (oldpool);
906 gst_object_unref (oldalloc);
909 gst_query_unref (oldquery);
915 gst_gl_mixer_do_bufferpool (GstGLMixer * mix, GstCaps * outcaps)
918 gboolean result = TRUE;
919 GstBufferPool *pool = NULL;
920 GstAllocator *allocator;
921 GstAllocationParams params;
922 GstAggregator *agg = GST_AGGREGATOR (mix);
924 /* find a pool for the negotiated caps now */
925 GST_DEBUG_OBJECT (mix, "doing allocation query");
926 query = gst_query_new_allocation (outcaps, TRUE);
927 if (!gst_pad_peer_query (agg->srcpad, query)) {
928 /* not a problem, just debug a little */
929 GST_DEBUG_OBJECT (mix, "peer ALLOCATION query failed");
932 GST_DEBUG_OBJECT (mix, "calling decide_allocation");
933 result = gst_gl_mixer_decide_allocation (mix, query);
935 GST_DEBUG_OBJECT (mix, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, result,
939 goto no_decide_allocation;
941 /* we got configuration from our peer or the decide_allocation method,
943 if (gst_query_get_n_allocation_params (query) > 0) {
944 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
947 gst_allocation_params_init (¶ms);
950 if (gst_query_get_n_allocation_pools (query) > 0)
951 gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
954 result = gst_gl_mixer_set_allocation (mix, pool, allocator, ¶ms, query);
959 no_decide_allocation:
961 GST_WARNING_OBJECT (mix, "Failed to decide allocation");
962 gst_query_unref (query);
969 gst_gl_mixer_process_textures (GstGLMixer * mix, GstBuffer * outbuf)
975 guint array_index = 0;
976 GstVideoFrame out_frame;
977 GstElement *element = GST_ELEMENT (mix);
978 GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mix);
979 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
980 GstGLMixerPrivate *priv = mix->priv;
981 gboolean to_download =
982 gst_caps_features_is_equal (GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY,
983 gst_caps_get_features (mix->out_caps, 0));
984 GstMapFlags out_map_flags = GST_MAP_WRITE;
986 GST_TRACE ("Processing buffers");
988 to_download |= !gst_is_gl_memory (gst_buffer_peek_memory (outbuf, 0));
991 out_map_flags |= GST_MAP_GL;
993 if (!gst_video_frame_map (&out_frame, &vagg->info, outbuf, out_map_flags)) {
998 out_tex = *(guint *) out_frame.data[0];
1000 GST_INFO ("Output Buffer does not contain correct memory, "
1001 "attempting to wrap for download");
1004 mix->download = gst_gl_download_new (mix->context);
1006 gst_gl_download_set_format (mix->download, &out_frame.info);
1007 out_tex = mix->out_tex_id;
1010 GST_OBJECT_LOCK (mix);
1011 walk = element->sinkpads;
1013 i = mix->frames->len;
1014 g_ptr_array_set_size (mix->frames, element->numsinkpads);
1015 for (; i < element->numsinkpads; i++)
1016 mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
1018 GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
1019 GstVideoAggregatorPad *vaggpad = walk->data;
1020 GstGLMixerFrameData *frame;
1022 frame = g_ptr_array_index (mix->frames, array_index);
1026 walk = g_list_next (walk);
1028 if (vaggpad->buffer != NULL) {
1032 pad->upload = gst_gl_upload_new (mix->context);
1034 gst_gl_upload_set_format (pad->upload, &vaggpad->info);
1037 if (!gst_gl_upload_perform_with_buffer (pad->upload,
1038 vaggpad->buffer, &in_tex, NULL)) {
1040 pad->mapped = FALSE;
1045 frame->texture = in_tex;
1050 g_mutex_lock (&priv->gl_resource_lock);
1051 if (!priv->gl_resource_ready)
1052 g_cond_wait (&priv->gl_resource_cond, &priv->gl_resource_lock);
1054 if (!priv->gl_resource_ready) {
1055 g_mutex_unlock (&priv->gl_resource_lock);
1056 GST_ERROR_OBJECT (mix,
1057 "fbo used to render can't be created, do not run process_textures");
1062 mix_class->process_textures (mix, mix->frames, out_tex);
1064 g_mutex_unlock (&priv->gl_resource_lock);
1067 if (!gst_gl_download_perform_with_data (mix->download, out_tex,
1069 GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s",
1070 "Failed to download video frame"), (NULL));
1078 walk = GST_ELEMENT (mix)->sinkpads;
1080 GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
1083 gst_gl_upload_release_buffer (pad->upload);
1085 pad->mapped = FALSE;
1086 walk = g_list_next (walk);
1089 GST_OBJECT_UNLOCK (mix);
1091 gst_video_frame_unmap (&out_frame);
1097 gst_gl_mixer_process_buffers (GstGLMixer * mix, GstBuffer * outbuf)
1100 guint i, array_index = 0;
1101 GstElement *element = GST_ELEMENT (mix);
1102 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
1104 GST_OBJECT_LOCK (mix);
1105 walk = GST_ELEMENT (mix)->sinkpads;
1106 i = mix->frames->len;
1107 g_ptr_array_set_size (mix->frames, element->numsinkpads);
1108 for (; i < element->numsinkpads; i++)
1109 mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
1110 while (walk) { /* We walk with this list because it's ordered */
1111 GstVideoAggregatorPad *vaggpad = walk->data;
1113 walk = g_list_next (walk);
1115 if (vaggpad->buffer != NULL) {
1116 /* put buffer into array */
1117 mix->array_buffers->pdata[array_index] = vaggpad->buffer;
1121 GST_OBJECT_UNLOCK (mix);
1123 return mix_class->process_buffers (mix, mix->array_buffers, outbuf);
1128 static GstFlowReturn
1129 gst_gl_mixer_aggregate_frames (GstVideoAggregator * vagg, GstBuffer * outbuf)
1131 gboolean res = FALSE;
1132 GstGLMixer *mix = GST_GL_MIXER (vagg);
1133 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (vagg);
1135 if (mix_class->process_buffers)
1136 res = gst_gl_mixer_process_buffers (mix, outbuf);
1137 else if (mix_class->process_textures)
1138 res = gst_gl_mixer_process_textures (mix, outbuf);
1140 return res ? GST_FLOW_OK : GST_FLOW_ERROR;
1144 gst_gl_mixer_get_property (GObject * object,
1145 guint prop_id, GValue * value, GParamSpec * pspec)
1149 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1155 gst_gl_mixer_set_property (GObject * object,
1156 guint prop_id, const GValue * value, GParamSpec * pspec)
1160 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1166 _clean_upload (GstAggregator * agg, GstPad * aggpad, gpointer udata)
1168 GstGLMixerPad *pad = GST_GL_MIXER_PAD (aggpad);
1171 gst_object_unref (pad->upload);
1179 _free_glmixer_frame_data (GstGLMixerFrameData * frame)
1181 g_slice_free1 (sizeof (GstGLMixerFrameData), frame);
1185 gst_gl_mixer_start (GstAggregator * agg)
1188 GstGLMixer *mix = GST_GL_MIXER (agg);
1189 GstElement *element = GST_ELEMENT (agg);
1191 if (!GST_AGGREGATOR_CLASS (parent_class)->start (agg))
1194 GST_OBJECT_LOCK (mix);
1195 mix->array_buffers = g_ptr_array_new_full (element->numsinkpads,
1196 (GDestroyNotify) _free_glmixer_frame_data);
1197 mix->frames = g_ptr_array_new_full (element->numsinkpads, NULL);
1199 g_ptr_array_set_size (mix->array_buffers, element->numsinkpads);
1200 g_ptr_array_set_size (mix->frames, element->numsinkpads);
1202 for (i = 0; i < element->numsinkpads; i++)
1203 mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
1205 GST_OBJECT_UNLOCK (mix);
1211 gst_gl_mixer_stop (GstAggregator * agg)
1213 GstGLMixer *mix = GST_GL_MIXER (agg);
1214 GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix);
1216 if (!GST_AGGREGATOR_CLASS (parent_class)->stop (agg))
1219 GST_OBJECT_LOCK (agg);
1220 g_ptr_array_free (mix->frames, TRUE);
1222 g_ptr_array_free (mix->array_buffers, TRUE);
1223 mix->array_buffers = NULL;
1224 GST_OBJECT_UNLOCK (agg);
1226 if (mixer_class->reset)
1227 mixer_class->reset (mix);
1229 gst_gl_context_del_fbo (mix->context, mix->fbo, mix->depthbuffer);
1231 mix->depthbuffer = 0;
1233 if (mix->download) {
1234 gst_object_unref (mix->download);
1235 mix->download = NULL;
1238 gst_aggregator_iterate_sinkpads (GST_AGGREGATOR (mix), _clean_upload, NULL);
1240 if (mix->priv->query) {
1241 gst_query_unref (mix->priv->query);
1242 mix->priv->query = NULL;
1245 if (mix->priv->pool) {
1246 gst_object_unref (mix->priv->pool);
1247 mix->priv->pool = NULL;
1251 gst_object_unref (mix->display);
1252 mix->display = NULL;
1256 gst_object_unref (mix->context);
1257 mix->context = NULL;
1260 gst_gl_mixer_reset (mix);