2 * Combine video streams to 3D stereo
5 * Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.com>
6 * Copyright (C) 2014 Jan Schmidt <jan@noraisin.net>
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
25 * SECTION:element-glstereomix
28 * Combine 2 input streams to produce a stereoscopic output
29 * stream. Input views are taken from the left pad and right pad
30 * respectively, and mixed according to their timelines.
32 * If either input stream is stereoscopic, the approproriate view
33 * (left or right) is taken from each stream and placed into the output.
35 * The multiview representation on the output is chosen according to
36 * the downstream caps.
40 * gst-launch-1.0 -v videotestsrc pattern=ball name=left \
41 * videotestsrc name=right glstereomix name=mix \
42 * left. ! vid/x-raw,width=640,height=480! glupload ! mix. \
43 * right. ! video/x-raw,width=640,height=480! glupload ! mix. \
44 * mix. ! video/x-raw'(memory:GLMemory)',multiview-mode=side-by-side ! \
45 * queue ! glimagesink output-multiview-mode=side-by-side
46 * ]| Mix 2 different videotestsrc patterns into a side-by-side stereo image and display it.
48 * gst-launch-1.0 -ev v4l2src name=left \
49 * videotestsrc name=right \
50 * glstereomix name=mix \
51 * left. ! video/x-raw,width=640,height=480 ! glupload ! glcolorconvert ! mix. \
52 * right. ! video/x-raw,width=640,height=480 ! glupload ! mix. \
53 * mix. ! video/x-raw'(memory:GLMemory)',multiview-mode=top-bottom ! \
54 * glcolorconvert ! gldownload ! queue ! x264enc ! h264parse ! \
55 * mp4mux ! progressreport ! filesink location=output.mp4
56 * ]| Mix the input from a camera to the left view, and videotestsrc to the right view,
57 * and encode as a top-bottom frame packed H.264 video.
64 #include "gstglstereomix.h"
66 #define GST_CAT_DEFAULT gst_gl_stereo_mix_debug
67 GST_DEBUG_CATEGORY (gst_gl_stereo_mix_debug);
69 G_DEFINE_TYPE (GstGLStereoMixPad, gst_gl_stereo_mix_pad, GST_TYPE_GL_MIXER_PAD);
72 gst_gl_stereo_mix_pad_class_init (GstGLStereoMixPadClass * klass)
77 gst_gl_stereo_mix_pad_init (GstGLStereoMixPad * pad)
81 static void gst_gl_stereo_mix_child_proxy_init (gpointer g_iface,
84 #define gst_gl_stereo_mix_parent_class parent_class
85 G_DEFINE_TYPE_WITH_CODE (GstGLStereoMix, gst_gl_stereo_mix, GST_TYPE_GL_MIXER,
86 G_IMPLEMENT_INTERFACE (GST_TYPE_CHILD_PROXY,
87 gst_gl_stereo_mix_child_proxy_init));
89 static GstCaps *_update_caps (GstVideoAggregator * vagg, GstCaps * caps);
90 static gboolean _negotiated_caps (GstAggregator * aggregator, GstCaps * caps);
91 static gboolean gst_gl_stereo_mix_make_output (GstGLStereoMix * mix);
92 static gboolean gst_gl_stereo_mix_process_frames (GstGLStereoMix * mixer);
94 #define DEFAULT_DOWNMIX GST_GL_STEREO_DOWNMIX_ANAGLYPH_GREEN_MAGENTA_DUBOIS
96 /* GLStereoMix signals and args */
109 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
112 GST_STATIC_CAPS ("video/x-raw(" GST_CAPS_FEATURE_MEMORY_GL_MEMORY "), "
113 "format = (string) RGBA, "
114 "width = " GST_VIDEO_SIZE_RANGE ", "
115 "height = " GST_VIDEO_SIZE_RANGE ", "
116 "framerate = " GST_VIDEO_FPS_RANGE ","
117 "texture-target = (string) 2D"
119 GST_VIDEO_CAPS_MAKE_WITH_FEATURES
120 (GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
122 "; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
125 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
128 GST_STATIC_CAPS ("video/x-raw(" GST_CAPS_FEATURE_MEMORY_GL_MEMORY "), "
129 "format = (string) RGBA, "
130 "width = " GST_VIDEO_SIZE_RANGE ", "
131 "height = " GST_VIDEO_SIZE_RANGE ", "
132 "framerate = " GST_VIDEO_FPS_RANGE ","
133 "texture-target = (string) 2D"
135 GST_VIDEO_CAPS_MAKE_WITH_FEATURES
136 (GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
138 "; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
141 static GstPad *gst_gl_stereo_mix_request_new_pad (GstElement * element,
142 GstPadTemplate * temp, const gchar * req_name, const GstCaps * caps);
143 static void gst_gl_stereo_mix_release_pad (GstElement * element, GstPad * pad);
145 static GstFlowReturn gst_gl_stereo_mix_create_output_buffer (GstVideoAggregator
146 * videoaggregator, GstBuffer ** outbuf);
147 static gboolean gst_gl_stereo_mix_stop (GstAggregator * agg);
148 static gboolean gst_gl_stereo_mix_start (GstAggregator * agg);
149 static gboolean gst_gl_stereo_mix_src_query (GstAggregator * agg,
152 static void gst_gl_stereo_mix_set_property (GObject * object, guint prop_id,
153 const GValue * value, GParamSpec * pspec);
154 static void gst_gl_stereo_mix_get_property (GObject * object, guint prop_id,
155 GValue * value, GParamSpec * pspec);
157 static void gst_gl_stereo_mix_finalize (GObject * object);
160 gst_gl_stereo_mix_aggregate_frames (GstVideoAggregator * vagg,
161 GstBuffer * outbuffer);
164 gst_gl_stereo_mix_class_init (GstGLStereoMixClass * klass)
166 GObjectClass *gobject_class = (GObjectClass *) klass;
167 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
168 GstVideoAggregatorClass *videoaggregator_class =
169 (GstVideoAggregatorClass *) klass;
170 GstAggregatorClass *agg_class = (GstAggregatorClass *) klass;
171 GstGLBaseMixerClass *base_mix_class = (GstGLBaseMixerClass *) klass;
173 GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glstereomixer", 0,
174 "opengl stereoscopic mixer");
176 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_gl_stereo_mix_finalize);
178 gobject_class->get_property = gst_gl_stereo_mix_get_property;
179 gobject_class->set_property = gst_gl_stereo_mix_set_property;
181 gst_element_class_set_metadata (element_class, "OpenGL stereo video combiner",
182 "Filter/Effect/Video", "OpenGL stereo video combiner",
183 "Jan Schmidt <jan@centricular.com>");
185 g_object_class_install_property (gobject_class, PROP_DOWNMIX_MODE,
186 g_param_spec_enum ("downmix-mode", "Mode for mono downmixed output",
187 "Output anaglyph type to generate when downmixing to mono",
188 GST_TYPE_GL_STEREO_DOWNMIX, DEFAULT_DOWNMIX,
189 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
191 gst_element_class_add_static_pad_template_with_gtype (element_class,
192 &src_factory, GST_TYPE_AGGREGATOR_PAD);
193 gst_element_class_add_static_pad_template_with_gtype (element_class,
194 &sink_factory, GST_TYPE_GL_STEREO_MIX_PAD);
196 element_class->request_new_pad =
197 GST_DEBUG_FUNCPTR (gst_gl_stereo_mix_request_new_pad);
198 element_class->release_pad =
199 GST_DEBUG_FUNCPTR (gst_gl_stereo_mix_release_pad);
201 agg_class->stop = gst_gl_stereo_mix_stop;
202 agg_class->start = gst_gl_stereo_mix_start;
203 agg_class->src_query = gst_gl_stereo_mix_src_query;
204 agg_class->negotiated_src_caps = _negotiated_caps;
206 videoaggregator_class->aggregate_frames = gst_gl_stereo_mix_aggregate_frames;
207 videoaggregator_class->update_caps = _update_caps;
208 videoaggregator_class->create_output_buffer =
209 gst_gl_stereo_mix_create_output_buffer;
211 base_mix_class->supported_gl_api =
212 GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3;
214 gst_type_mark_as_plugin_api (GST_TYPE_GL_STEREO_DOWNMIX, 0);
215 gst_type_mark_as_plugin_api (GST_TYPE_GL_STEREO_MIX_PAD, 0);
219 gst_gl_stereo_mix_init (GstGLStereoMix * mix)
224 gst_gl_stereo_mix_finalize (GObject * object)
226 //GstGLStereoMix *mix = GST_GL_STEREO_MIX (object);
228 G_OBJECT_CLASS (parent_class)->finalize (object);
232 gst_gl_stereo_mix_query_caps (GstPad * pad, GstAggregator * agg,
235 GstCaps *filter, *caps;
237 gst_query_parse_caps (query, &filter);
239 caps = gst_pad_get_current_caps (agg->srcpad);
241 caps = gst_pad_get_pad_template_caps (agg->srcpad);
245 caps = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
247 gst_query_set_caps_result (query, caps);
248 gst_caps_unref (caps);
254 gst_gl_stereo_mix_src_query (GstAggregator * agg, GstQuery * query)
256 switch (GST_QUERY_TYPE (query)) {
258 return gst_gl_stereo_mix_query_caps (agg->srcpad, agg, query);
264 return GST_AGGREGATOR_CLASS (parent_class)->src_query (agg, query);
269 gst_gl_stereo_mix_create_output_buffer (GstVideoAggregator * videoaggregator,
272 GstGLStereoMix *mix = GST_GL_STEREO_MIX (videoaggregator);
273 GstFlowReturn ret = GST_FLOW_OK;
277 if (!mix->priv->pool_active) {
278 if (!gst_buffer_pool_set_active (mix->priv->pool, TRUE)) {
279 GST_ELEMENT_ERROR (mix, RESOURCE, SETTINGS,
280 ("failed to activate bufferpool"), ("failed to activate bufferpool"));
281 return GST_FLOW_ERROR;
283 mix->priv->pool_active = TRUE;
286 return gst_buffer_pool_acquire_buffer (mix->priv->pool, outbuf, NULL);
289 if (!gst_gl_stereo_mix_make_output (mix)) {
290 gst_buffer_replace (&mix->primary_out, NULL);
291 gst_buffer_replace (&mix->auxilliary_out, NULL);
292 GST_ELEMENT_ERROR (mix, RESOURCE, SETTINGS,
293 ("Failed to generate output"), ("failed to generate output"));
294 ret = GST_FLOW_ERROR;
297 if (mix->auxilliary_out) {
298 *outbuf = mix->auxilliary_out;
299 mix->auxilliary_out = NULL;
301 *outbuf = mix->primary_out;
302 mix->primary_out = NULL;
308 gst_gl_stereo_mix_make_output (GstGLStereoMix * mix)
311 gboolean res = FALSE;
312 GstElement *element = GST_ELEMENT (mix);
313 gboolean missing_buffer = FALSE;
315 GST_LOG_OBJECT (mix, "Processing buffers");
317 GST_OBJECT_LOCK (mix);
318 walk = element->sinkpads;
320 GstVideoAggregatorPad *vaggpad = walk->data;
321 GstGLStereoMixPad *pad = walk->data;
322 GstBuffer *buffer = gst_video_aggregator_pad_get_current_buffer (vaggpad);
324 GST_LOG_OBJECT (mix, "Checking pad %" GST_PTR_FORMAT, vaggpad);
326 if (buffer != NULL) {
327 pad->current_buffer = buffer;
329 GST_DEBUG_OBJECT (pad, "Got buffer %" GST_PTR_FORMAT,
330 pad->current_buffer);
332 GST_LOG_OBJECT (mix, "No buffer on pad %" GST_PTR_FORMAT, vaggpad);
333 pad->current_buffer = NULL;
334 missing_buffer = TRUE;
336 walk = g_list_next (walk);
338 if (missing_buffer) {
339 /* We're still waiting for a buffer to turn up on at least one input */
340 GST_WARNING_OBJECT (mix, "Not generating output - need more input buffers");
345 /* Copy GL memory from each input frame to the output */
346 if (!gst_gl_stereo_mix_process_frames (mix)) {
347 GST_LOG_OBJECT (mix, "Failed to process frames to output");
351 if (mix->primary_out == NULL)
357 GST_OBJECT_UNLOCK (mix);
363 gst_gl_stereo_mix_aggregate_frames (GstVideoAggregator * vagg,
366 GstGLStereoMix *mix = GST_GL_STEREO_MIX (vagg);
367 /* If we're operating in frame-by-frame mode, push
368 * the primary view now, and let the parent class
369 * push the remaining auxiliary view */
370 if (GST_VIDEO_INFO_MULTIVIEW_MODE (&vagg->info) ==
371 GST_VIDEO_MULTIVIEW_MODE_FRAME_BY_FRAME) {
372 /* Transfer the timestamps video-agg put on the aux buffer */
373 gst_buffer_copy_into (mix->primary_out, outbuf,
374 GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
375 gst_aggregator_finish_buffer (GST_AGGREGATOR (vagg), mix->primary_out);
376 mix->primary_out = NULL;
378 /* And actually, we don't want timestamps on the aux buffer */
379 GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
380 GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
386 gst_gl_stereo_mix_get_property (GObject * object,
387 guint prop_id, GValue * value, GParamSpec * pspec)
389 GstGLStereoMix *mix = GST_GL_STEREO_MIX (object);
392 case PROP_DOWNMIX_MODE:
393 g_value_set_enum (value, mix->downmix_mode);
396 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
402 gst_gl_stereo_mix_set_property (GObject * object,
403 guint prop_id, const GValue * value, GParamSpec * pspec)
405 GstGLStereoMix *mix = GST_GL_STEREO_MIX (object);
408 case PROP_DOWNMIX_MODE:
409 mix->downmix_mode = g_value_get_enum (value);
410 if (mix->viewconvert)
411 g_object_set_property (G_OBJECT (mix->viewconvert), "downmix-mode",
415 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
421 gst_gl_stereo_mix_request_new_pad (GstElement * element, GstPadTemplate * templ,
422 const gchar * req_name, const GstCaps * caps)
427 GST_ELEMENT_CLASS (parent_class)->request_new_pad (element,
428 templ, req_name, caps);
431 goto could_not_create;
433 gst_child_proxy_child_added (GST_CHILD_PROXY (element), G_OBJECT (newpad),
434 GST_OBJECT_NAME (newpad));
436 return GST_PAD_CAST (newpad);
440 GST_DEBUG_OBJECT (element, "could not create/add pad");
446 gst_gl_stereo_mix_release_pad (GstElement * element, GstPad * pad)
448 GST_DEBUG_OBJECT (element, "release pad %s:%s", GST_DEBUG_PAD_NAME (pad));
450 gst_child_proxy_child_removed (GST_CHILD_PROXY (element), G_OBJECT (pad),
451 GST_OBJECT_NAME (pad));
453 GST_ELEMENT_CLASS (parent_class)->release_pad (element, pad);
457 gst_gl_stereo_mix_start (GstAggregator * agg)
459 GstGLStereoMix *mix = GST_GL_STEREO_MIX (agg);
461 if (!GST_AGGREGATOR_CLASS (parent_class)->start (agg))
464 GST_OBJECT_LOCK (mix);
465 mix->viewconvert = gst_gl_view_convert_new ();
466 g_object_set (G_OBJECT (mix->viewconvert), "downmix-mode",
467 mix->downmix_mode, NULL);
468 GST_OBJECT_UNLOCK (mix);
474 gst_gl_stereo_mix_stop (GstAggregator * agg)
476 GstGLStereoMix *mix = GST_GL_STEREO_MIX (agg);
478 if (!GST_AGGREGATOR_CLASS (parent_class)->stop (agg))
481 if (mix->viewconvert) {
482 gst_object_unref (mix->viewconvert);
483 mix->viewconvert = NULL;
489 /* Convert to caps that can be accepted by this element... */
491 get_converted_caps (GstGLStereoMix * mix, GstCaps * caps)
494 GstGLContext *context = GST_GL_BASE_MIXER (mix)->context;
495 GstCaps *result, *tmp;
497 GST_LOG_OBJECT (mix, "Converting caps %" GST_PTR_FORMAT, caps);
498 result = gst_gl_upload_transform_caps (context, GST_PAD_SINK, caps, NULL);
500 GST_TRACE_OBJECT (mix, "transfer returned caps %" GST_PTR_FORMAT, tmp);
503 gst_gl_color_convert_transform_caps (context, GST_PAD_SINK, tmp, NULL);
504 gst_caps_unref (tmp);
505 GST_TRACE_OBJECT (mix, "convert returned caps %" GST_PTR_FORMAT, tmp);
508 result = gst_gl_view_convert_transform_caps (mix->viewconvert,
509 GST_PAD_SINK, tmp, NULL);
510 gst_caps_unref (tmp);
514 GST_LOG_OBJECT (mix, "Converting caps %" GST_PTR_FORMAT, caps);
515 result = gst_gl_view_convert_transform_caps (mix->viewconvert,
516 GST_PAD_SINK, caps, NULL);
519 GST_LOG_OBJECT (mix, "returning caps %" GST_PTR_FORMAT, result);
524 /* Return the possible output caps based on inputs and downstream prefs */
526 _update_caps (GstVideoAggregator * vagg, GstCaps * caps)
528 GstGLStereoMix *mix = GST_GL_STEREO_MIX (vagg);
530 gint best_width = -1, best_height = -1;
531 gdouble best_fps = -1, cur_fps;
532 gint best_fps_n = 0, best_fps_d = 1;
533 GstVideoInfo *mix_info;
534 GstCaps *blend_caps, *tmp_caps;
537 GST_OBJECT_LOCK (vagg);
539 for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
540 GstVideoAggregatorPad *pad = l->data;
541 GstVideoInfo tmp = pad->info;
542 gint this_width, this_height;
545 if (!pad->info.finfo)
548 /* This can happen if we release a pad and another pad hasn't been negotiated_caps yet */
549 if (GST_VIDEO_INFO_FORMAT (&pad->info) == GST_VIDEO_FORMAT_UNKNOWN)
552 /* Convert to per-view width/height for unpacked forms */
553 gst_video_multiview_video_info_change_mode (&tmp,
554 GST_VIDEO_MULTIVIEW_MODE_SEPARATED, GST_VIDEO_MULTIVIEW_FLAGS_NONE);
556 this_width = GST_VIDEO_INFO_WIDTH (&tmp);
557 this_height = GST_VIDEO_INFO_HEIGHT (&tmp);
558 fps_n = GST_VIDEO_INFO_FPS_N (&tmp);
559 fps_d = GST_VIDEO_INFO_FPS_D (&tmp);
561 GST_INFO_OBJECT (vagg, "Input pad %" GST_PTR_FORMAT
562 " w %u h %u", pad, this_width, this_height);
564 if (this_width == 0 || this_height == 0)
567 if (best_width < this_width)
568 best_width = this_width;
569 if (best_height < this_height)
570 best_height = this_height;
575 gst_util_fraction_to_double (fps_n, fps_d, &cur_fps);
577 if (best_fps < cur_fps) {
583 /* FIXME: Preserve PAR for at least one input when different sized inputs */
585 GST_OBJECT_UNLOCK (vagg);
587 mix_info = &mix->mix_info;
588 gst_video_info_set_format (mix_info, GST_VIDEO_FORMAT_RGBA, best_width,
591 GST_VIDEO_INFO_FPS_N (mix_info) = best_fps_n;
592 GST_VIDEO_INFO_FPS_D (mix_info) = best_fps_d;
594 GST_VIDEO_INFO_MULTIVIEW_MODE (mix_info) = GST_VIDEO_MULTIVIEW_MODE_SEPARATED;
595 GST_VIDEO_INFO_VIEWS (mix_info) = 2;
597 /* FIXME: If input is marked as flipped or flopped, preserve those flags */
598 GST_VIDEO_INFO_MULTIVIEW_FLAGS (mix_info) = GST_VIDEO_MULTIVIEW_FLAGS_NONE;
600 /* Choose our output format based on downstream preferences */
601 blend_caps = gst_video_info_to_caps (mix_info);
603 gst_caps_set_features (blend_caps, 0,
604 gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY));
606 tmp_caps = get_converted_caps (GST_GL_STEREO_MIX (vagg), blend_caps);
607 gst_caps_unref (blend_caps);
609 out_caps = gst_caps_intersect (caps, tmp_caps);
610 gst_caps_unref (tmp_caps);
612 GST_DEBUG_OBJECT (vagg, "Possible output caps %" GST_PTR_FORMAT, out_caps);
617 /* Called after videoaggregator fixates our caps */
619 _negotiated_caps (GstAggregator * agg, GstCaps * caps)
621 GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
622 GstGLStereoMix *mix = GST_GL_STEREO_MIX (vagg);
625 GST_LOG_OBJECT (mix, "Configured output caps %" GST_PTR_FORMAT, caps);
627 if (GST_AGGREGATOR_CLASS (parent_class)->negotiated_src_caps)
628 if (!GST_AGGREGATOR_CLASS (parent_class)->negotiated_src_caps (agg, caps))
631 /* Update the glview_convert output */
633 /* We can configure the view_converter now */
634 gst_gl_view_convert_set_context (mix->viewconvert,
635 GST_GL_BASE_MIXER (mix)->context);
637 in_caps = gst_video_info_to_caps (&mix->mix_info);
638 gst_caps_set_features (in_caps, 0,
639 gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY));
640 gst_caps_set_simple (in_caps, "texture-target", G_TYPE_STRING,
641 GST_GL_TEXTURE_TARGET_2D_STR, NULL);
643 gst_gl_view_convert_set_caps (mix->viewconvert, in_caps, caps);
648 /* called with the object lock held */
650 gst_gl_stereo_mix_process_frames (GstGLStereoMix * mixer)
652 GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mixer);
653 GstBuffer *converted_buffer, *inbuf;
654 GstVideoInfo *out_info = &vagg->info;
655 #ifndef G_DISABLE_ASSERT
659 gint valid_views = 0;
662 inbuf = gst_buffer_new ();
663 walk = GST_ELEMENT (mixer)->sinkpads;
665 GstGLStereoMixPad *pad = walk->data;
668 GST_LOG_OBJECT (mixer, "Handling frame %d", valid_views);
670 if (!pad || !pad->current_buffer) {
671 GST_DEBUG ("skipping texture, null frame");
672 walk = g_list_next (walk);
676 in_mem = gst_buffer_get_memory (pad->current_buffer, 0);
678 GST_LOG_OBJECT (mixer,
679 "Appending memory %" GST_PTR_FORMAT " to intermediate buffer", in_mem);
680 /* Appending the memory to a 2nd buffer locks it
681 * exclusive a 2nd time, which will mark it for
682 * copy-on-write. The ref will keep the memory
683 * alive but we add a parent_buffer_meta to also
684 * prevent the input buffer from returning to any buffer
685 * pool it might belong to
687 gst_buffer_append_memory (inbuf, in_mem);
688 /* Use parent buffer meta to keep input buffer alive */
689 gst_buffer_add_parent_buffer_meta (inbuf, pad->current_buffer);
692 walk = g_list_next (walk);
695 if (mixer->mix_info.views != valid_views) {
696 GST_WARNING_OBJECT (mixer, "Not enough input views to process");
700 if (GST_VIDEO_INFO_MULTIVIEW_MODE (out_info) ==
701 GST_VIDEO_MULTIVIEW_MODE_SEPARATED)
702 views = out_info->views;
706 /* We can configure the view_converter now */
707 gst_gl_view_convert_set_context (mixer->viewconvert,
708 GST_GL_BASE_MIXER (mixer)->context);
710 if (gst_gl_view_convert_submit_input_buffer (mixer->viewconvert,
711 FALSE, inbuf) != GST_FLOW_OK)
714 /* Clear any existing buffers, just in case */
715 gst_buffer_replace (&mixer->primary_out, NULL);
716 gst_buffer_replace (&mixer->auxilliary_out, NULL);
718 if (gst_gl_view_convert_get_output (mixer->viewconvert,
719 &mixer->primary_out) != GST_FLOW_OK)
722 if (GST_VIDEO_INFO_MULTIVIEW_MODE (out_info) ==
723 GST_VIDEO_MULTIVIEW_MODE_FRAME_BY_FRAME) {
724 if (gst_gl_view_convert_get_output (mixer->viewconvert,
725 &mixer->auxilliary_out) != GST_FLOW_OK)
729 if (mixer->primary_out == NULL)
732 converted_buffer = mixer->primary_out;
734 #ifndef G_DISABLE_ASSERT
735 n = gst_buffer_n_memory (converted_buffer);
736 g_assert (n == GST_VIDEO_INFO_N_PLANES (out_info) * views);
739 for (v = 0; v < views; v++) {
740 gst_buffer_add_video_meta_full (converted_buffer, v,
741 GST_VIDEO_INFO_FORMAT (out_info),
742 GST_VIDEO_INFO_WIDTH (out_info),
743 GST_VIDEO_INFO_HEIGHT (out_info),
744 GST_VIDEO_INFO_N_PLANES (out_info), out_info->offset, out_info->stride);
745 if (mixer->auxilliary_out) {
746 gst_buffer_add_video_meta_full (mixer->auxilliary_out, v,
747 GST_VIDEO_INFO_FORMAT (out_info),
748 GST_VIDEO_INFO_WIDTH (out_info),
749 GST_VIDEO_INFO_HEIGHT (out_info),
750 GST_VIDEO_INFO_N_PLANES (out_info), out_info->offset,
758 /* GstChildProxy implementation */
760 gst_gl_stereo_mix_child_proxy_get_child_by_index (GstChildProxy * child_proxy,
763 GstGLStereoMix *gl_stereo_mix = GST_GL_STEREO_MIX (child_proxy);
766 GST_OBJECT_LOCK (gl_stereo_mix);
767 obj = g_list_nth_data (GST_ELEMENT_CAST (gl_stereo_mix)->sinkpads, index);
769 gst_object_ref (obj);
770 GST_OBJECT_UNLOCK (gl_stereo_mix);
776 gst_gl_stereo_mix_child_proxy_get_children_count (GstChildProxy * child_proxy)
779 GstGLStereoMix *gl_stereo_mix = GST_GL_STEREO_MIX (child_proxy);
781 GST_OBJECT_LOCK (gl_stereo_mix);
782 count = GST_ELEMENT_CAST (gl_stereo_mix)->numsinkpads;
783 GST_OBJECT_UNLOCK (gl_stereo_mix);
784 GST_INFO_OBJECT (gl_stereo_mix, "Children Count: %d", count);
790 gst_gl_stereo_mix_child_proxy_init (gpointer g_iface, gpointer iface_data)
792 GstChildProxyInterface *iface = g_iface;
794 iface->get_child_by_index = gst_gl_stereo_mix_child_proxy_get_child_by_index;
795 iface->get_children_count = gst_gl_stereo_mix_child_proxy_get_children_count;