/* Generic video mixer plugin * * GStreamer * Copyright (C) 2009 Julien Isorce * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #ifdef HAVE_STDLIB_H #include #endif #ifdef HAVE_STRING_H #include #endif #include "gstglmixer.h" #define GST_CAT_DEFAULT gst_gl_mixer_debug GST_DEBUG_CATEGORY (gst_gl_mixer_debug); #define GST_GL_MIXER_GET_STATE_LOCK(mix) \ (GST_GL_MIXER(mix)->state_lock) #define GST_GL_MIXER_STATE_LOCK(mix) \ (g_mutex_lock(GST_GL_MIXER_GET_STATE_LOCK (mix))) #define GST_GL_MIXER_STATE_UNLOCK(mix) \ (g_mutex_unlock(GST_GL_MIXER_GET_STATE_LOCK (mix))) static void gst_gl_mixer_pad_class_init (GstGLMixerPadClass * klass); static void gst_gl_mixer_pad_init (GstGLMixerPad * mixerpad); static void gst_gl_mixer_pad_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_gl_mixer_pad_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static gboolean gst_gl_mixer_src_event (GstPad * pad, GstEvent * event); static gboolean gst_gl_mixer_sink_event (GstPad * pad, GstEvent * event); enum { PROP_PAD_0 }; G_DEFINE_TYPE (GstGLMixerPad, gst_gl_mixer_pad, GST_TYPE_PAD); static void gst_gl_mixer_pad_class_init (GstGLMixerPadClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; gobject_class->set_property = gst_gl_mixer_pad_set_property; gobject_class->get_property = gst_gl_mixer_pad_get_property; } static void gst_gl_mixer_pad_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { //GstGLMixerPad *pad = GST_GL_MIXER_PAD (object); switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_gl_mixer_pad_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { //GstGLMixerPad *pad = GST_GL_MIXER_PAD (object); switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_gl_mixer_set_master_geometry (GstGLMixer * mix) { GSList *walk = mix->sinkpads; gint fps_n = 0; gint fps_d = 0; GstGLMixerPad *master = NULL; while (walk) { GstGLMixerPad *mixpad = GST_GL_MIXER_PAD (walk->data); walk = g_slist_next (walk); /* If mix framerate < mixpad framerate, using fractions */ GST_DEBUG_OBJECT (mix, "comparing framerate %d/%d to mixpad's %d/%d", fps_n, fps_d, mixpad->fps_n, mixpad->fps_d); if ((!fps_n && !fps_d) || ((gint64) fps_n * mixpad->fps_d < (gint64) mixpad->fps_n * fps_d)) { fps_n = mixpad->fps_n; fps_d = mixpad->fps_d; GST_DEBUG_OBJECT (mix, "becomes the master pad"); master = mixpad; } } /* set results */ if (mix->master != master || mix->fps_n != fps_n || mix->fps_d != fps_d) { mix->setcaps = TRUE; mix->sendseg = TRUE; mix->master = master; mix->fps_n = fps_n; mix->fps_d = fps_d; } } static gboolean gst_gl_mixer_pad_sink_setcaps (GstPad * pad, GstCaps * vscaps) { GstGLMixer *mix = GST_GL_MIXER (gst_pad_get_parent (pad)); GstGLMixerPad *mixpad = GST_GL_MIXER_PAD (pad); GstStructure *structure = gst_caps_get_structure (vscaps, 0); gint width = 0; gint height = 0; gboolean ret = FALSE; const GValue *framerate = gst_structure_get_value (structure, "framerate"); GST_INFO_OBJECT (mix, "Setting caps %" GST_PTR_FORMAT, vscaps); if (!gst_structure_get_int (structure, "width", &width) || !gst_structure_get_int (structure, "height", &height) || !framerate) goto beach; GST_GL_MIXER_STATE_LOCK (mix); mixpad->fps_n = gst_value_get_fraction_numerator (framerate); mixpad->fps_d = gst_value_get_fraction_denominator (framerate); mixpad->width = width; mixpad->height = height; gst_gl_mixer_set_master_geometry (mix); GST_GL_MIXER_STATE_UNLOCK (mix); ret = TRUE; beach: gst_object_unref (mix); return ret; } static void gst_gl_mixer_pad_init (GstGLMixerPad * mixerpad) { gst_pad_set_setcaps_function (GST_PAD (mixerpad), gst_gl_mixer_pad_sink_setcaps); mixerpad->display = NULL; } /* GLMixer signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { PROP_0 }; static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_GL_VIDEO_CAPS) ); static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS (GST_GL_VIDEO_CAPS) ); static void gst_gl_mixer_finalize (GObject * object); static GstCaps *gst_gl_mixer_getcaps (GstPad * pad); static gboolean gst_gl_mixer_setcaps (GstPad * pad, GstCaps * caps); static gboolean gst_gl_mixer_query (GstPad * pad, GstQuery * query); static GstFlowReturn gst_gl_mixer_collected (GstCollectPads * pads, GstGLMixer * mix); static GstPad *gst_gl_mixer_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * name); static void gst_gl_mixer_release_pad (GstElement * element, GstPad * pad); static void gst_gl_mixer_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_gl_mixer_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstStateChangeReturn gst_gl_mixer_change_state (GstElement * element, GstStateChange transition); static void gst_gl_mixer_child_proxy_init (gpointer g_iface, gpointer iface_data); static void _do_init (GType object_type); GST_BOILERPLATE_FULL (GstGLMixer, gst_gl_mixer, GstElement, GST_TYPE_ELEMENT, _do_init); static void _do_init (GType object_type) { static const GInterfaceInfo child_proxy_info = { (GInterfaceInitFunc) gst_gl_mixer_child_proxy_init, NULL, NULL }; GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glmixer", 0, "opengl mixer"); g_type_add_interface_static (object_type, GST_TYPE_CHILD_PROXY, &child_proxy_info); GST_INFO ("GstChildProxy interface registered"); } static GstObject * gst_gl_mixer_child_proxy_get_child_by_index (GstChildProxy * child_proxy, guint index) { GstGLMixer *mix = GST_GL_MIXER (child_proxy); GstObject *obj; GST_GL_MIXER_STATE_LOCK (mix); if ((obj = g_slist_nth_data (mix->sinkpads, index))) gst_object_ref (obj); GST_GL_MIXER_STATE_UNLOCK (mix); return obj; } static guint gst_gl_mixer_child_proxy_get_children_count (GstChildProxy * child_proxy) { guint count = 0; GstGLMixer *mix = GST_GL_MIXER (child_proxy); GST_GL_MIXER_STATE_LOCK (mix); count = mix->numpads; GST_GL_MIXER_STATE_UNLOCK (mix); GST_INFO_OBJECT (mix, "Children Count: %d", count); return count; } static void gst_gl_mixer_child_proxy_init (gpointer g_iface, gpointer iface_data) { GstChildProxyInterface *iface = g_iface; GST_INFO ("intializing child proxy interface"); iface->get_child_by_index = gst_gl_mixer_child_proxy_get_child_by_index; iface->get_children_count = gst_gl_mixer_child_proxy_get_children_count; } static void gst_gl_mixer_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_factory)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&sink_factory)); } static void gst_gl_mixer_class_init (GstGLMixerClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstElementClass *gstelement_class = (GstElementClass *) klass; gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_gl_mixer_finalize); gobject_class->get_property = gst_gl_mixer_get_property; gobject_class->set_property = gst_gl_mixer_set_property; gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_gl_mixer_request_new_pad); gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_gl_mixer_release_pad); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_gl_mixer_change_state); /* Register the pad class */ (void) (GST_TYPE_GL_MIXER_PAD); klass->set_caps = NULL; } static void gst_gl_mixer_collect_free (GstGLMixerCollect * mixcol) { if (mixcol->buffer) { gst_buffer_unref (mixcol->buffer); mixcol->buffer = NULL; } } static void gst_gl_mixer_reset (GstGLMixer * mix) { GSList *walk; mix->width = 0; mix->height = 0; mix->fps_n = 0; mix->fps_d = 0; mix->setcaps = FALSE; mix->sendseg = FALSE; mix->segment_position = 0; mix->segment_rate = 1.0; mix->last_ts = 0; /* clean up collect data */ walk = mix->collect->data; while (walk) { GstGLMixerCollect *data = (GstGLMixerCollect *) walk->data; gst_gl_mixer_collect_free (data); walk = g_slist_next (walk); } mix->next_sinkpad = 0; } static void gst_gl_mixer_init (GstGLMixer * mix, GstGLMixerClass * g_class) { GstElementClass *klass = GST_ELEMENT_GET_CLASS (mix); mix->srcpad = gst_pad_new_from_template (gst_element_class_get_pad_template (klass, "src"), "src"); gst_pad_set_getcaps_function (GST_PAD (mix->srcpad), GST_DEBUG_FUNCPTR (gst_gl_mixer_getcaps)); gst_pad_set_setcaps_function (GST_PAD (mix->srcpad), GST_DEBUG_FUNCPTR (gst_gl_mixer_setcaps)); gst_pad_set_query_function (GST_PAD (mix->srcpad), GST_DEBUG_FUNCPTR (gst_gl_mixer_query)); gst_pad_set_event_function (GST_PAD (mix->srcpad), GST_DEBUG_FUNCPTR (gst_gl_mixer_src_event)); gst_element_add_pad (GST_ELEMENT (mix), mix->srcpad); mix->collect = gst_collect_pads_new (); gst_collect_pads_set_function (mix->collect, (GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_gl_mixer_collected), mix); mix->state_lock = g_mutex_new (); mix->array_buffers = 0; mix->display = NULL; mix->fbo = 0; mix->depthbuffer = 0; /* initialize variables */ gst_gl_mixer_reset (mix); } static void gst_gl_mixer_finalize (GObject * object) { GstGLMixer *mix = GST_GL_MIXER (object); gst_object_unref (mix->collect); g_mutex_free (mix->state_lock); G_OBJECT_CLASS (parent_class)->finalize (object); } static gboolean gst_gl_mixer_query_duration (GstGLMixer * mix, GstQuery * query) { gint64 max; gboolean res; GstFormat format; GstIterator *it; gboolean done; /* parse format */ gst_query_parse_duration (query, &format, NULL); max = -1; res = TRUE; done = FALSE; /* Take maximum of all durations */ it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix)); while (!done) { GstIteratorResult ires; gpointer item; ires = gst_iterator_next (it, &item); switch (ires) { case GST_ITERATOR_DONE: done = TRUE; break; case GST_ITERATOR_OK: { GstPad *pad = GST_PAD_CAST (item); gint64 duration; /* ask sink peer for duration */ res &= gst_pad_query_peer_duration (pad, &format, &duration); /* take max from all valid return values */ if (res) { /* valid unknown length, stop searching */ if (duration == -1) { max = duration; done = TRUE; } /* else see if bigger than current max */ else if (duration > max) max = duration; } gst_object_unref (pad); break; } case GST_ITERATOR_RESYNC: max = -1; res = TRUE; gst_iterator_resync (it); break; default: res = FALSE; done = TRUE; break; } } gst_iterator_free (it); if (res) { /* and store the max */ GST_DEBUG_OBJECT (mix, "Total duration in format %s: %" GST_TIME_FORMAT, gst_format_get_name (format), GST_TIME_ARGS (max)); gst_query_set_duration (query, format, max); } return res; } static gboolean gst_gl_mixer_query_latency (GstGLMixer * mix, GstQuery * query) { GstClockTime min, max; gboolean live; gboolean res; GstIterator *it; gboolean done; res = TRUE; done = FALSE; live = FALSE; min = 0; max = GST_CLOCK_TIME_NONE; /* Take maximum of all latency values */ it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix)); while (!done) { GstIteratorResult ires; gpointer item; ires = gst_iterator_next (it, &item); switch (ires) { case GST_ITERATOR_DONE: done = TRUE; break; case GST_ITERATOR_OK: { GstPad *pad = GST_PAD_CAST (item); GstQuery *peerquery; GstClockTime min_cur, max_cur; gboolean live_cur; peerquery = gst_query_new_latency (); /* Ask peer for latency */ res &= gst_pad_peer_query (pad, peerquery); /* take max from all valid return values */ if (res) { gst_query_parse_latency (peerquery, &live_cur, &min_cur, &max_cur); if (min_cur > min) min = min_cur; if (max_cur != GST_CLOCK_TIME_NONE && ((max != GST_CLOCK_TIME_NONE && max_cur > max) || (max == GST_CLOCK_TIME_NONE))) max = max_cur; live = live || live_cur; } gst_query_unref (peerquery); gst_object_unref (pad); break; } case GST_ITERATOR_RESYNC: live = FALSE; min = 0; max = GST_CLOCK_TIME_NONE; res = TRUE; gst_iterator_resync (it); break; default: res = FALSE; done = TRUE; break; } } gst_iterator_free (it); if (res) { /* store the results */ GST_DEBUG_OBJECT (mix, "Calculated total latency: live %s, min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT, (live ? "yes" : "no"), GST_TIME_ARGS (min), GST_TIME_ARGS (max)); gst_query_set_latency (query, live, min, max); } return res; } static gboolean gst_gl_mixer_query (GstPad * pad, GstQuery * query) { GstGLMixer *mix = GST_GL_MIXER (gst_pad_get_parent (pad)); gboolean res = FALSE; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_POSITION: { GstFormat format; gst_query_parse_position (query, &format, NULL); switch (format) { case GST_FORMAT_TIME: /* FIXME, bring to stream time, might be tricky */ gst_query_set_position (query, format, mix->last_ts); res = TRUE; break; default: break; } break; } case GST_QUERY_DURATION: res = gst_gl_mixer_query_duration (mix, query); break; case GST_QUERY_LATENCY: res = gst_gl_mixer_query_latency (mix, query); break; case GST_QUERY_CUSTOM: { /* mix is a sink in terms of gl chain, so we are sharing the gldisplay that * comes from src pad with every display of the sink pads */ GSList *walk = mix->sinkpads; GstStructure *structure = gst_query_get_structure (query); res = g_strcmp0 (gst_element_get_name (mix), gst_structure_get_name (structure)) == 0; if (!res) { GstGLDisplay *foreign_display = NULL; gulong foreign_gl_context = 0; if (mix->display) { /* this gl filter is a sink in terms of the gl chain */ foreign_display = mix->display; } else { /* at least one gl element is after in our gl chain */ /* id_value is set by upstream element of itself when going * to paused state */ const GValue *id_value = gst_structure_get_value (structure, "gstgldisplay"); foreign_display = GST_GL_DISPLAY (g_value_get_pointer (id_value)); } foreign_gl_context = gst_gl_display_get_internal_gl_context (foreign_display); /* iterate on each sink pad until reaching the gl element * that requested the query */ while (!res && walk) { GstGLMixerPad *sink_pad = GST_GL_MIXER_PAD (walk->data); GstPad *peer = gst_pad_get_peer (GST_PAD_CAST (sink_pad)); walk = g_slist_next (walk); g_return_val_if_fail (sink_pad->display != NULL, FALSE); gst_gl_display_activate_gl_context (foreign_display, FALSE); res = gst_gl_display_create_context (sink_pad->display, foreign_gl_context); gst_gl_display_activate_gl_context (foreign_display, TRUE); if (res) gst_structure_set (structure, "gstgldisplay", G_TYPE_POINTER, sink_pad->display, NULL); else GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, GST_GL_DISPLAY_ERR_MSG (sink_pad->display), (NULL)); /* does not work: * res = gst_pad_query_default (GST_PAD_CAST (sink_pad), query);*/ res = gst_pad_query (peer, query); gst_object_unref (peer); } } break; } default: /* FIXME, needs a custom query handler because we have multiple * sinkpads, send to the master pad until then */ res = gst_pad_query (GST_PAD_CAST (mix->master), query); break; } gst_object_unref (mix); return res; } static GstCaps * gst_gl_mixer_getcaps (GstPad * pad) { GstGLMixer *mix = GST_GL_MIXER (gst_pad_get_parent (pad)); GstCaps *caps = gst_caps_copy (gst_pad_get_pad_template_caps (mix->srcpad)); GstStructure *structure = gst_caps_get_structure (caps, 0); gst_structure_set (structure, "width", G_TYPE_INT, 8000, NULL); gst_structure_set (structure, "height", G_TYPE_INT, /*G_MAXINT */ 6000, NULL); if (mix->fps_d != 0) gst_structure_set (structure, "framerate", GST_TYPE_FRACTION, mix->fps_n, mix->fps_d, NULL); gst_object_unref (mix); return caps; } static gboolean gst_gl_mixer_setcaps (GstPad * pad, GstCaps * caps) { GstGLMixer *mix = GST_GL_MIXER (gst_pad_get_parent_element (pad)); GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix); GstStructure *structure = gst_caps_get_structure (caps, 0); gint width = 0; gint height = 0; GST_INFO_OBJECT (mix, "set src caps: %" GST_PTR_FORMAT, caps); if (!gst_structure_get_int (structure, "width", &width) || !gst_structure_get_int (structure, "height", &height)) { gst_object_unref (mix); return FALSE; } GST_GL_MIXER_STATE_LOCK (mix); mix->width = width; mix->height = height; GST_GL_MIXER_STATE_UNLOCK (mix); if (!gst_gl_display_gen_fbo (mix->display, mix->width, mix->height, &mix->fbo, &mix->depthbuffer)) { GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, GST_GL_DISPLAY_ERR_MSG (mix->display), (NULL)); gst_object_unref (mix); return FALSE; } if (mixer_class->set_caps) mixer_class->set_caps (mix, caps); gst_object_unref (mix); return TRUE; } static GstPad * gst_gl_mixer_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * req_name) { GstGLMixer *mix = GST_GL_MIXER (element); GstGLMixerPad *mixpad = NULL; GstElementClass *klass = GST_ELEMENT_GET_CLASS (element); if (templ == gst_element_class_get_pad_template (klass, "sink_%d")) { gint serial = 0; gchar *name = NULL; GstGLMixerCollect *mixcol = NULL; if (req_name == NULL || strlen (req_name) < 6) { /* no name given when requesting the pad, use next available int */ serial = mix->next_sinkpad++; } else { /* parse serial number from requested padname */ serial = atoi (&req_name[5]); if (serial >= mix->next_sinkpad) mix->next_sinkpad = serial + 1; } /* create new pad with the name */ name = g_strdup_printf ("sink_%d", serial); mixpad = g_object_new (GST_TYPE_GL_MIXER_PAD, "name", name, "direction", templ->direction, "template", templ, NULL); g_free (name); GST_GL_MIXER_STATE_LOCK (mix); mixcol = (GstGLMixerCollect *) gst_collect_pads_add_pad (mix->collect, GST_PAD (mixpad), sizeof (GstGLMixerCollect)); /* FIXME: hacked way to override/extend the event function of * GstCollectPads; because it sets its own event function giving the * element no access to events */ mix->collect_event = (GstPadEventFunction) GST_PAD_EVENTFUNC (GST_PAD (mixpad)); gst_pad_set_event_function (GST_PAD (mixpad), GST_DEBUG_FUNCPTR (gst_gl_mixer_sink_event)); /* Keep track of each other */ mixcol->mixpad = mixpad; mixpad->mixcol = mixcol; /* Keep an internal list of mixpads for zordering */ mix->sinkpads = g_slist_append (mix->sinkpads, mixpad); mix->numpads++; GST_GL_MIXER_STATE_UNLOCK (mix); } else { g_warning ("glmixer: this is not our template!"); return NULL; } /* add the pad to the element */ gst_element_add_pad (element, GST_PAD (mixpad)); gst_child_proxy_child_added (GST_OBJECT (mix), GST_OBJECT (mixpad)); return GST_PAD (mixpad); } static void gst_gl_mixer_release_pad (GstElement * element, GstPad * pad) { GstGLMixer *mix = GST_GL_MIXER (element); GstGLMixerPad *mixpad = NULL; GST_GL_MIXER_STATE_LOCK (mix); if (G_UNLIKELY (g_slist_find (mix->sinkpads, pad) == NULL)) { g_warning ("Unknown pad %s", GST_PAD_NAME (pad)); goto error; } mixpad = GST_GL_MIXER_PAD (pad); mix->sinkpads = g_slist_remove (mix->sinkpads, pad); gst_gl_mixer_collect_free (mixpad->mixcol); gst_collect_pads_remove_pad (mix->collect, pad); gst_child_proxy_child_removed (GST_OBJECT (mix), GST_OBJECT (mixpad)); /* determine possibly new geometry and master */ gst_gl_mixer_set_master_geometry (mix); mix->numpads--; GST_GL_MIXER_STATE_UNLOCK (mix); gst_element_remove_pad (element, pad); return; error: GST_GL_MIXER_STATE_UNLOCK (mix); } /* try to get a buffer on all pads. As long as the queued value is * negative, we skip buffers */ static gboolean gst_gl_mixer_fill_queues (GstGLMixer * mix) { GSList *walk = NULL; gboolean eos = TRUE; g_return_val_if_fail (GST_IS_GL_MIXER (mix), FALSE); /* try to make sure we have a buffer from each usable pad first */ walk = mix->collect->data; while (walk) { GstCollectData *data = (GstCollectData *) walk->data; GstGLMixerCollect *mixcol = (GstGLMixerCollect *) data; GstGLMixerPad *mixpad = mixcol->mixpad; walk = g_slist_next (walk); if (mixcol->buffer == NULL) { GstBuffer *buf = NULL; GST_LOG_OBJECT (mix, "we need a new buffer"); buf = gst_collect_pads_peek (mix->collect, data); if (buf) { guint64 duration; GST_LOG_OBJECT (mix, "we have a buffer !"); mixcol->buffer = buf; duration = GST_BUFFER_DURATION (mixcol->buffer); /* no duration on the buffer, use the framerate */ if (!GST_CLOCK_TIME_IS_VALID (duration)) { if (mixpad->fps_n == 0) { duration = GST_CLOCK_TIME_NONE; } else { duration = gst_util_uint64_scale_int (GST_SECOND, mixpad->fps_d, mixpad->fps_n); } } if (GST_CLOCK_TIME_IS_VALID (duration)) mixpad->queued += duration; else if (!mixpad->queued) mixpad->queued = GST_CLOCK_TIME_NONE; } else { GST_LOG_OBJECT (mix, "pop returned a NULL buffer"); } } if (mix->sendseg && (mixpad == mix->master)) { GstEvent *event; gint64 stop, start; GstSegment *segment = &data->segment; /* FIXME, use rate/applied_rate as set on all sinkpads. * - currently we just set rate as received from last seek-event * We could potentially figure out the duration as well using * the current segment positions and the stated stop positions. * Also we just start from stream time 0 which is rather * weird. For non-synchronized mixing, the time should be * the min of the stream times of all received segments, * rationale being that the duration is at least going to * be as long as the earliest stream we start mixing. This * would also be correct for synchronized mixing but then * the later streams would be delayed until the stream times * match. */ GST_INFO_OBJECT (mix, "_sending play segment"); start = segment->accum; /* get the duration of the segment if we can and add it to the accumulated * time on the segment. */ if (segment->stop != -1 && segment->start != -1) stop = start + (segment->stop - segment->start); else stop = -1; event = gst_event_new_new_segment_full (FALSE, segment->rate, 1.0, segment->format, start, stop, start + mix->segment_position); gst_pad_push_event (mix->srcpad, event); mix->sendseg = FALSE; } if (mixcol->buffer != NULL && GST_CLOCK_TIME_IS_VALID (mixpad->queued)) { /* got a buffer somewhere so we're not eos */ eos = FALSE; } } return eos; } static void gst_gl_mixer_process_buffers (GstGLMixer * mix, GstBuffer * outbuf) { GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix); GSList *walk = mix->sinkpads; gint array_index = 0; while (walk) { /* We walk with this list because it's ordered */ GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data); GstGLMixerCollect *mixcol = pad->mixcol; walk = g_slist_next (walk); if (mixcol->buffer != NULL) { GstClockTime timestamp; gint64 stream_time; GstSegment *seg; seg = &mixcol->collect.segment; timestamp = GST_BUFFER_TIMESTAMP (mixcol->buffer); stream_time = gst_segment_to_stream_time (seg, GST_FORMAT_TIME, timestamp); /* sync object properties on stream time */ if (GST_CLOCK_TIME_IS_VALID (stream_time)) gst_object_sync_values (G_OBJECT (pad), stream_time); /* put buffer into array */ mix->array_buffers->pdata[array_index] = mixcol->buffer; if (pad == mix->master) { gint64 running_time; running_time = gst_segment_to_running_time (seg, GST_FORMAT_TIME, timestamp); /* outgoing buffers need the running_time */ GST_BUFFER_TIMESTAMP (outbuf) = running_time; GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (mixcol->buffer); mix->last_ts = running_time; if (GST_BUFFER_DURATION_IS_VALID (outbuf)) mix->last_ts += GST_BUFFER_DURATION (outbuf); } } ++array_index; } mix_class->process_buffers (mix, mix->array_buffers, outbuf); } /* remove buffers from the queue that were expired in the * interval of the master, we also prepare the queued value * in the pad so that we can skip and fill buffers later on */ static void gst_gl_mixer_update_queues (GstGLMixer * mix) { GSList *walk; gint64 interval; interval = mix->master->queued; if (interval <= 0) { if (mix->fps_n == 0) { interval = G_MAXINT64; } else { interval = GST_SECOND * mix->fps_d / mix->fps_n; } GST_LOG_OBJECT (mix, "set interval to %" G_GINT64_FORMAT " nanoseconds", interval); } walk = mix->sinkpads; while (walk) { GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data); GstGLMixerCollect *mixcol = pad->mixcol; walk = g_slist_next (walk); if (mixcol->buffer != NULL) { pad->queued -= interval; GST_LOG_OBJECT (pad, "queued now %" G_GINT64_FORMAT, pad->queued); if (pad->queued <= 0) { GstBuffer *buffer = gst_collect_pads_pop (mix->collect, &mixcol->collect); GST_LOG_OBJECT (pad, "unreffing buffer"); if (buffer) gst_buffer_unref (buffer); else GST_WARNING_OBJECT (pad, "Buffer was removed by GstCollectPads in the meantime"); gst_buffer_unref (mixcol->buffer); mixcol->buffer = NULL; } } } } static GstFlowReturn gst_gl_mixer_collected (GstCollectPads * pads, GstGLMixer * mix) { GstFlowReturn ret = GST_FLOW_OK; GstBuffer *outbuf = NULL; GstGLBuffer *gl_outbuf = NULL; gboolean eos = FALSE; gint width = 0; gint height = 0; g_return_val_if_fail (GST_IS_GL_MIXER (mix), GST_FLOW_ERROR); if (mix->width == 0) { GstCaps *newcaps = gst_caps_make_writable (gst_pad_get_negotiated_caps (GST_PAD (mix->master))); gst_pad_set_caps (mix->srcpad, newcaps); } GST_LOG_OBJECT (mix, "all pads are collected"); GST_GL_MIXER_STATE_LOCK (mix); eos = gst_gl_mixer_fill_queues (mix); if (eos) { /* Push EOS downstream */ GST_LOG_OBJECT (mix, "all our sinkpads are EOS, pushing downstream"); gst_pad_push_event (mix->srcpad, gst_event_new_eos ()); ret = GST_FLOW_WRONG_STATE; goto error; } /* Calculating out buffer size from input size */ ret = gst_gl_buffer_parse_caps (GST_PAD_CAPS (mix->srcpad), &width, &height); if (!ret) goto error; gl_outbuf = gst_gl_buffer_new (mix->display, mix->width, mix->height); outbuf = GST_BUFFER (gl_outbuf); gst_buffer_set_caps (outbuf, GST_PAD_CAPS (mix->srcpad)); gst_gl_mixer_process_buffers (mix, outbuf); gst_gl_mixer_update_queues (mix); GST_GL_MIXER_STATE_UNLOCK (mix); ret = gst_pad_push (mix->srcpad, outbuf); beach: return ret; /* ERRORS */ error: { if (outbuf) gst_buffer_unref (outbuf); GST_GL_MIXER_STATE_UNLOCK (mix); goto beach; } } static gboolean forward_event_func (GstPad * pad, GValue * ret, GstEvent * event) { gst_event_ref (event); GST_LOG_OBJECT (pad, "About to send event %s", GST_EVENT_TYPE_NAME (event)); if (!gst_pad_push_event (pad, event)) { g_value_set_boolean (ret, FALSE); GST_WARNING_OBJECT (pad, "Sending event %p (%s) failed.", event, GST_EVENT_TYPE_NAME (event)); } else { GST_LOG_OBJECT (pad, "Sent event %p (%s).", event, GST_EVENT_TYPE_NAME (event)); } gst_object_unref (pad); return TRUE; } /* forwards the event to all sinkpads, takes ownership of the * event * * Returns: TRUE if the event could be forwarded on all * sinkpads. */ static gboolean forward_event (GstGLMixer * mix, GstEvent * event) { GstIterator *it; GValue vret = { 0 }; GST_LOG_OBJECT (mix, "Forwarding event %p (%s)", event, GST_EVENT_TYPE_NAME (event)); g_value_init (&vret, G_TYPE_BOOLEAN); g_value_set_boolean (&vret, TRUE); it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix)); gst_iterator_fold (it, (GstIteratorFoldFunction) forward_event_func, &vret, event); gst_iterator_free (it); gst_event_unref (event); return g_value_get_boolean (&vret); } static gboolean gst_gl_mixer_src_event (GstPad * pad, GstEvent * event) { GstGLMixer *mix = GST_GL_MIXER (gst_pad_get_parent (pad)); gboolean result; switch (GST_EVENT_TYPE (event)) { case GST_EVENT_QOS: /* QoS might be tricky */ result = FALSE; break; case GST_EVENT_SEEK: { GstSeekFlags flags; GstSeekType curtype; gint64 cur; /* parse the seek parameters */ gst_event_parse_seek (event, NULL, NULL, &flags, &curtype, &cur, NULL, NULL); /* check if we are flushing */ if (flags & GST_SEEK_FLAG_FLUSH) { /* make sure we accept nothing anymore and return WRONG_STATE */ gst_collect_pads_set_flushing (mix->collect, TRUE); /* flushing seek, start flush downstream, the flush will be done * when all pads received a FLUSH_STOP. */ gst_pad_push_event (mix->srcpad, gst_event_new_flush_start ()); } /* now wait for the collected to be finished and mark a new * segment */ GST_OBJECT_LOCK (mix->collect); if (curtype == GST_SEEK_TYPE_SET) mix->segment_position = cur; else mix->segment_position = 0; mix->sendseg = TRUE; GST_OBJECT_UNLOCK (mix->collect); result = forward_event (mix, event); break; } case GST_EVENT_NAVIGATION: /* navigation is rather pointless. */ result = FALSE; break; default: /* just forward the rest for now */ result = forward_event (mix, event); break; } gst_object_unref (mix); return result; } static gboolean gst_gl_mixer_sink_event (GstPad * pad, GstEvent * event) { GstGLMixerPad *vpad = GST_GL_MIXER_PAD (pad); GstGLMixer *videomixer = GST_GL_MIXER (gst_pad_get_parent (pad)); gboolean ret; GST_DEBUG_OBJECT (pad, "Got %s event on pad %s:%s", GST_EVENT_TYPE_NAME (event), GST_DEBUG_PAD_NAME (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_FLUSH_STOP: /* mark a pending new segment. This event is synchronized * with the streaming thread so we can safely update the * variable without races. It's somewhat weird because we * assume the collectpads forwarded the FLUSH_STOP past us * and downstream (using our source pad, the bastard!). */ videomixer->sendseg = TRUE; /* Reset pad state after FLUSH_STOP */ if (vpad->mixcol->buffer) gst_buffer_unref (vpad->mixcol->buffer); vpad->mixcol->buffer = NULL; vpad->queued = 0; break; case GST_EVENT_NEWSEGMENT: videomixer->sendseg = TRUE; break; default: break; } /* now GstCollectPads can take care of the rest, e.g. EOS */ ret = videomixer->collect_event (pad, event); gst_object_unref (videomixer); return ret; } static void gst_gl_mixer_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { //GstGLMixer *mix = GST_GL_MIXER (object); switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_gl_mixer_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { //GstGLMixer *mix = GST_GL_MIXER (object); switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstStateChangeReturn gst_gl_mixer_change_state (GstElement * element, GstStateChange transition) { GstGLMixer *mix; GstStateChangeReturn ret; GstGLMixerClass *mixer_class; g_return_val_if_fail (GST_IS_GL_MIXER (element), GST_STATE_CHANGE_FAILURE); mix = GST_GL_MIXER (element); mixer_class = GST_GL_MIXER_GET_CLASS (mix); switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: { GSList *walk = mix->sinkpads; gint i = 0; GstElement *parent = GST_ELEMENT (gst_element_get_parent (mix)); GstStructure *structure = NULL; GstQuery *query = NULL; gboolean isPerformed = FALSE; if (!parent) { GST_ELEMENT_ERROR (mix, CORE, STATE_CHANGE, (NULL), ("A parent bin is required")); return FALSE; } structure = gst_structure_new (gst_element_get_name (mix), NULL); query = gst_query_new_application (GST_QUERY_CUSTOM, structure); /* retrieve the gldisplay that is owned by gl elements after the gl mixer */ isPerformed = gst_element_query (parent, query); if (isPerformed) { const GValue *id_value = gst_structure_get_value (structure, "gstgldisplay"); if (G_VALUE_HOLDS_POINTER (id_value)) /* at least one gl element is after in our gl chain */ mix->display = g_object_ref (GST_GL_DISPLAY (g_value_get_pointer (id_value))); else { /* this gl filter is a sink in terms of the gl chain */ mix->display = gst_gl_display_new (); gst_gl_display_create_context (mix->display, 0); } } gst_query_unref (query); gst_object_unref (GST_OBJECT (parent)); /* instanciate a gldisplay for each sink pad */ while (walk) { GstGLMixerPad *sink_pad = GST_GL_MIXER_PAD (walk->data); walk = g_slist_next (walk); sink_pad->display = gst_gl_display_new (); } mix->array_buffers = g_ptr_array_sized_new (mix->next_sinkpad); for (i = 0; i < mix->next_sinkpad; ++i) { g_ptr_array_add (mix->array_buffers, NULL); } GST_LOG_OBJECT (mix, "starting collectpads"); gst_collect_pads_start (mix->collect); break; } case GST_STATE_CHANGE_PAUSED_TO_READY: { GSList *walk = mix->sinkpads; GST_LOG_OBJECT (mix, "stopping collectpads"); gst_collect_pads_stop (mix->collect); g_ptr_array_free (mix->array_buffers, TRUE); while (walk) { GstGLMixerPad *sink_pad = GST_GL_MIXER_PAD (walk->data); walk = g_slist_next (walk); if (sink_pad->display) gst_gl_display_activate_gl_context (sink_pad->display, FALSE); } if (mixer_class->reset) mixer_class->reset (mix); if (mix->fbo) { gst_gl_display_del_fbo (mix->display, mix->fbo, mix->depthbuffer); mix->fbo = 0; mix->depthbuffer = 0; } if (mix->display) { g_object_unref (mix->display); mix->display = NULL; } while (walk) { GstGLMixerPad *sink_pad = GST_GL_MIXER_PAD (walk->data); walk = g_slist_next (walk); if (sink_pad->display) { gst_gl_display_activate_gl_context (sink_pad->display, TRUE); g_object_unref (sink_pad->display); sink_pad->display = NULL; } } break; } default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: gst_gl_mixer_reset (mix); break; default: break; } return ret; }